CN111037844B - A pre-injection one-shot product and an overmolded two-shot product - Google Patents
A pre-injection one-shot product and an overmolded two-shot product Download PDFInfo
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- CN111037844B CN111037844B CN201911409250.XA CN201911409250A CN111037844B CN 111037844 B CN111037844 B CN 111037844B CN 201911409250 A CN201911409250 A CN 201911409250A CN 111037844 B CN111037844 B CN 111037844B
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- rib
- positioning column
- plastic body
- inner ring
- terminal
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- 238000002347 injection Methods 0.000 title claims abstract description 33
- 239000007924 injection Substances 0.000 title claims abstract description 33
- 239000004033 plastic Substances 0.000 claims abstract description 104
- 238000002844 melting Methods 0.000 claims abstract description 40
- 230000008018 melting Effects 0.000 claims abstract description 40
- 238000001746 injection moulding Methods 0.000 claims description 57
- 239000011248 coating agent Substances 0.000 claims description 20
- 238000000576 coating method Methods 0.000 claims description 20
- 238000005538 encapsulation Methods 0.000 claims description 19
- 239000012778 molding material Substances 0.000 claims description 8
- 230000015556 catabolic process Effects 0.000 abstract description 8
- 238000010073 coating (rubber) Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 8
- 238000000465 moulding Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 238000009422 external insulation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OFCNXPDARWKPPY-UHFFFAOYSA-N allopurinol Chemical compound OC1=NC=NC2=C1C=NN2 OFCNXPDARWKPPY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14008—Inserting articles into the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
本发明公开一种预注塑一射产品和包胶注塑二射产品，预注塑一射产品包括端子及至少一个塑胶体，塑胶体包括第一正面、第一反面及两个侧面，塑胶体的第一正面上、第一反面上、至少一个侧面上均设有至少一个定位柱；定位柱外周设有内圈熔融筋及外圈熔融筋，内圈熔融筋与定位柱之间及外圈熔融筋与内圈熔融筋之间均保持间距；包胶注塑二射产品包括设在预注塑一射产品外周的包覆塑胶体，第一定位柱的上表面与包覆塑胶体的上表面齐平，第二定位柱远离塑胶体的上表面与包覆塑胶体对应的侧面齐平。本发明通过先设计预注塑一射产品，增加定位及熔融筋以防泄露，再对预注塑一射产品二次包胶形成二射产品，可解决柔软端子定位，抗电击穿以及气密性问题。
The present invention discloses a pre-injection one-shot product and a rubber-coated injection two-shot product. The pre-injection one-shot product includes a terminal and at least one plastic body. The plastic body includes a first front side, a first back side and two side surfaces. At least one positioning column is provided on the first front side, the first back side and at least one side surface of the plastic body. The outer periphery of the positioning column is provided with an inner ring melting rib and an outer ring melting rib. The inner ring melting rib and the positioning column and the outer ring melting rib and the inner ring melting rib are kept at a distance. The rubber-coated injection two-shot product includes a coated plastic body provided at the outer periphery of the pre-injection one-shot product. The upper surface of the first positioning column is flush with the upper surface of the coated plastic body, and the upper surface of the second positioning column away from the plastic body is flush with the side surface corresponding to the coated plastic body. The present invention solves the problems of soft terminal positioning, anti-electrical breakdown and airtightness by first designing a pre-injection one-shot product, adding positioning and melting ribs to prevent leakage, and then rubber-coating the pre-injection one-shot product twice to form a two-shot product.
Description
Technical Field
The invention relates to the field of embedded injection molding design, in particular to a pre-injection molding one-shot product and an encapsulation injection molding two-shot product.
Background
With the development and popularization of new energy automobiles, automobile electronic products are increasingly widely used, and the automobile electronic products cannot be separated from weak current signal transmission and strong current transmission. The embedded plastic injection molding of the copper terminal which is developed along with the method is also rapidly developed, and the more the embedded injection molding piece is used in the automobile electronics, the more the design and molding possibility of a complex product is realized by utilizing the excellent conductive performance of the copper terminal and the insulation of the plastic. Meanwhile, the functional requirements of the automobile electronic product on the terminal embedded encapsulation injection molding product are very severe, such as air tightness, electric breakdown resistance, cold and hot impact and the like. However, the existing plastic injection molding products with embedded terminals cannot well solve the positioning of soft terminals in the injection molding products and cannot solve the problem of air tightness of connector terminals.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a pre-injection molding one-shot product and an encapsulation injection molding two-shot product, so as to solve the problems of soft terminal positioning, electric breakdown resistance and air tightness, and the technical scheme is as follows:
The invention provides a pre-injection molding one-shot product and an encapsulated injection molding two-shot product, wherein the pre-injection molding one-shot product comprises a terminal and at least one plastic body arranged on the periphery of the terminal, the plastic body is formed by encapsulating the outer part Zhou Zhusu of the terminal, two ends of the terminal in the length direction extend out of the plastic body, the plastic body comprises a first front face, a first back face and two side faces which are arranged in a vertically opposite mode, the terminal is provided with a second front face and a second back face which are arranged in a vertically opposite mode, at least one positioning column is arranged on the first front face and the first back face of the plastic body, the axis of the positioning column is perpendicular to the surface of the corresponding plastic body, the pre-injection molding one-shot product further comprises an inner ring molten rib circumferentially surrounding the periphery of the positioning column and an outer ring molten rib arranged on the periphery of the inner ring molten rib, and a space is kept between the inner ring molten rib and the positioning column and the inner ring molten rib.
Further, at least one first positioning column is arranged on the first front surface and the first back surface of the plastic body, a second positioning column is arranged on at least one side surface of the plastic body, and the axial line direction of the first positioning column is not parallel to the axial line direction of the second positioning column;
The outer periphery of the first positioning column is provided with a first inner ring molten rib and a first outer ring molten rib arranged on the outer periphery of the first inner ring molten rib, the outer periphery of the second positioning column is provided with a second inner ring molten rib and a second outer ring molten rib arranged on the outer periphery of the second inner ring molten rib, the first inner ring molten rib and the first positioning column and the first outer ring molten rib and the first inner ring molten rib are kept at intervals, and the second inner ring molten rib and the second positioning column and the second outer ring molten rib and the second inner ring molten rib are kept at intervals.
Further, the height of the first outer ring molten rib from the first front surface or the first back surface is smaller than or equal to the height of the first inner ring molten rib from the first front surface or the first back surface, the height of the first inner ring molten rib from the first front surface or the first back surface is smaller than or equal to the height of the first positioning column from the first front surface or the first back surface, the height of the second outer ring molten rib from the side surface is smaller than or equal to the height of the second inner ring molten rib from the side surface, and the height of the second inner ring molten rib from the side surface is smaller than or equal to the height of the second positioning column from the side surface.
Further, the first positioning column and the second positioning column are of cylindrical structures, and the plastic body, the first positioning column, the second positioning column, the first inner ring melting rib, the first outer ring melting rib, the second inner ring melting rib and the second outer ring melting rib all comprise injection molding materials.
Further, the first front face, the second front face, the first back face and the second back face are all arranged in parallel.
Further, the terminal is provided with a plurality of terminals, the plurality of terminals are arranged in parallel, and connecting ribs are arranged between every two adjacent terminals.
Further, the number of the plastic bodies is multiple, and a space is kept between every two adjacent plastic bodies.
Further, the plastic body is of a square structure or a special-shaped structure.
The invention further comprises an encapsulated injection molding two-shot product for preventing terminal leakage, wherein the encapsulated injection molding two-shot product is formed by coating plastic on the pre-injection molding one-shot product through a two-shot mold, the encapsulated injection molding two-shot product comprises an encapsulated plastic body arranged on the periphery of the pre-injection molding one-shot product, the length of the encapsulated plastic body is smaller than that of the terminal, two ends of the terminal in the length direction extend out of the encapsulated plastic body, the upper surface of a first positioning column is flush with the top surface of the encapsulated plastic body, the upper surface of a second positioning column, which is far away from the plastic body, is flush with the side surface corresponding to the encapsulated plastic body, and the upper surface of the plastic body and the side surface corresponding to the encapsulated plastic body are positioned on the same side.
Further, the shape of the coating plastic body corresponds to the shape of the terminal, and the coating plastic body comprises injection molding material.
The technical scheme provided by the invention has the following beneficial effects:
a. According to the pre-injection molding one-shot product provided by the invention, the positioning column is designed on the pre-embedded terminal, the design of the positioning column can ensure the accurate positioning of the pre-embedded one-shot product in the secondary injection mold, the problem of inaccurate positioning of the common one-shot product in the secondary injection mold is solved, and the electrical breakdown conduction, high-voltage performance and external insulation performance of the terminal are ensured;
b. The periphery of the positioning column is provided with a film inner ring melting rib and a film outer ring melting rib, and in the process of secondarily injecting and encapsulating a primary injection product, the film melting rib is melted and fused with the secondarily encapsulated plastic during the secondary encapsulating, so that the air tightness of the terminal is ensured, the plug interface terminal is not leaked, and the sealing performance of the product is further ensured;
c. According to the pre-injection molding one-shot product and the rubber coating injection molding two-shot product, the pre-injection molding one-shot product is designed, the positioning and the melting ribs are added to prevent leakage, and the rubber coating injection molding two-shot product is formed by secondarily injecting the pre-injection molding one-shot product, so that the problems of positioning of a soft terminal, electric breakdown resistance and air tightness can be solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front perspective view of a pre-injection molded one shot product provided in an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1 of a pre-injection molded one shot product provided in an embodiment of the present invention;
FIG. 3 is a rear perspective view of a pre-injection molded one shot product provided in accordance with an embodiment of the present invention;
FIG. 4 is a perspective view of an over-molded two-shot product provided by an embodiment of the present invention;
FIG. 5 is an enlarged view of FIG. 4 of an over-molded two-shot product provided in an embodiment of the present invention;
Fig. 6 is an enlarged view of the positioning post in fig. 4 of an over-molded two-shot product provided by an embodiment of the present invention.
The reference numerals comprise 1-terminal, 11-second front face, 12-second back face, 13-connecting ribs, 2-plastic body, 21-first front face, 22-first back face, 23-side face, 3-first positioning column, 31-first inner ring melting rib, 32-first outer ring melting rib, 4-second positioning column, 41-second inner ring melting rib, 42-second outer ring melting rib, 5-cladding plastic body and 6-top face.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or device.
In one embodiment of the present invention, a pre-injection-molded one-shot product is provided, and a specific structure is shown in fig. 1 and 3, the pre-injection-molded one-shot product comprises a terminal 1 and at least one plastic body 2 arranged on the periphery of the terminal 1, the terminal is a copper terminal, the plastic body 2 is formed by injection molding the periphery of the terminal 1, namely, the terminal is placed in an injection molding device for pre-injection molding, the periphery of the terminal is pre-injected with pre-injection-shot cladding plastic, the injection molding plastic surrounds the periphery of the terminal 1 to form the plastic body 2, and the plastic body 2 does not cover two ends of the terminal in the length direction, but comprises a part of upper surface of the terminal, a part of lower surface corresponding to the upper surface and two sides.
The first front surface 21, the first back surface 22 and the at least one side surface 23 are respectively provided with at least one positioning column, the positioning column structure is shown in fig. 2, the axial lead of the positioning column is vertical to the surface of the corresponding plastic body 2, the pre-injection molding one-shot product further comprises an inner ring melting rib circumferentially surrounding the periphery of the positioning column and an outer ring melting rib arranged on the periphery of the inner ring melting rib, and the inner ring melting rib and the positioning column and the outer ring melting rib and the inner ring melting rib are respectively kept at intervals. The inner ring molten rib and the outer ring molten rib are both in a film shape.
The molding body 2 includes a first front surface 21 and a first back surface 22 which are disposed vertically opposite to each other, and two side surfaces 23 which are disposed horizontally opposite to each other, referring to fig. 1, the terminal 1 has a second front surface 11 and a second back surface 12 which are disposed vertically opposite to each other, and two side surfaces which are disposed horizontally opposite to each other, preferably, the first front surface 21, the second front surface 11, the first back surface 22 and the second back surface 12 are all disposed in parallel, the side surfaces of the molding body 2 are parallel to the side surfaces of the terminal, the first front surface 21 corresponds to the second front surface 11, the first back surface 22 corresponds to the second back surface 12, and the two side surfaces of the molding body 2 correspond to the two side surfaces of the terminal 1, respectively.
When the number of the plastic bodies 2 is multiple, the distance between every two adjacent plastic bodies 2 is kept, the plastic bodies 2 can be of a square structure or a special-shaped structure, only the terminals are coated, and the shape of the plastic bodies 2 is explained, namely, if one terminal is provided, the plastic bodies 2 are formed by injection molding and encapsulation on the periphery of the terminal 1, namely, the plastic bodies 2 are formed by injection molding and encapsulation in a circumferential direction around the periphery of the terminal 1, so that two end parts of the terminal are visible, and other parts of the terminal cannot be seen due to the fact that the plastic bodies 2 are coated. If there are a plurality of terminals, plastic body 2 with a larger area is formed by injection molding and encapsulation on the periphery of terminal 1, so that both ends of all terminals are visible, and other parts of the terminals cannot be seen due to the plastic body 2 being coated.
The first front surface 21 and the first back surface 22 are both provided with at least one first positioning column 3, see fig. 2, the axial lead of the first positioning column 3 is perpendicular to the first front surface 21, at least one side surface 23 of the plastic body 2 is provided with a second positioning column 4, the axial lead of the second positioning column 4 is perpendicular to the side surface 23, if the first front surface 21 is horizontally arranged, the side surfaces are vertically arranged, the axial lead direction of the first positioning column 3 is not parallel to the axial lead direction of the second positioning column 4, and the axial lead direction of the first positioning column 3 is preferably perpendicular to the axial lead direction of the second positioning column 4.
The outer periphery of the first positioning column 3 is provided with a first inner ring molten rib 31 and a first outer ring molten rib 32 arranged on the outer periphery of the first inner ring molten rib 31, as shown in fig. 2, 5 and 6, the outer periphery of the second positioning column 4 is provided with a second inner ring molten rib 41 and a second outer ring molten rib 42 arranged on the outer periphery of the second inner ring molten rib 41, the first inner ring molten rib 31 and the first positioning column 3 and the first outer ring molten rib 32 and the first inner ring molten rib 31 are kept at intervals, the second inner ring molten rib 41 and the second positioning column 4 and the second outer ring molten rib 42 and the second inner ring molten rib 41 are kept at intervals, and during secondary encapsulation, plastic enters into the gaps between the first inner ring molten rib 31 and the first positioning column 3, the gaps between the first outer ring molten rib 32 and the first inner ring molten rib 31, the gaps between the second inner ring molten rib 41 and the second positioning column 4 and the second inner ring molten rib 41, and the gaps between the second outer ring molten rib 42 and the second inner ring molten rib 41, and the sealing performance of the second inner ring molten rib 41 is ensured.
When the first positioning column 3 is of a cylindrical structure, the first inner ring molten rib 31 circumferentially surrounds the outer periphery of the first positioning column 3 to form a first circle, the first outer ring molten rib 32 circumferentially surrounds the outer periphery of the first inner ring molten rib 31 to form a second circle, the first positioning column 3, the first circle and the second circle are coaxially arranged, and the circular core line of the first circle, the circular core line of the first circle and the circular core line of the second circle are all perpendicular to the first front face.
When the second positioning column 4 is in a cylindrical structure, the second inner ring molten rib 41 circumferentially surrounds the outer periphery of the second positioning column 4 to form a third circle, the second outer ring molten rib 42 circumferentially surrounds the outer periphery of the first inner ring molten rib 41 to form a fourth circle, the second positioning column 4, the third circle and the fourth circle are coaxially arranged, and the circular center lines of the third circle, the third circle and the fourth circle are perpendicular to the side surfaces.
The height between the first outer ring molten rib 32 and the first front surface 21 or the first back surface 22 is lower than or equal to the height between the first inner ring molten rib 31 and the first front surface 21 or the first back surface 22, the height between the first inner ring molten rib 31 and the first front surface 21 or the first back surface 22 is lower than or equal to the height between the first positioning column 3 and the first front surface 21 or the first back surface 22, preferably, the height between the first outer ring molten rib 32 and the first back surface 22 is lower than the height between the first inner ring molten rib 31 and the first front surface 21 or the first back surface 22, and the height between the first inner ring molten rib 31 and the first inner ring molten rib 31 is lower than the height between the first positioning column 3 and the first front surface 21 or the first back surface 22, so that the first inner ring molten rib 31 and the first outer ring molten rib 32 are molten in the secondary encapsulation process, and the sealing property is ensured; if the first inner ring molten rib 31, the first outer ring molten rib 32 are flush with the first positioning column 3, when in secondary encapsulation, the top of the first positioning column is attached to the injection molding cavity, and then plastic cannot enter a gap, and in a product formed after secondary encapsulation, part of the injection molded product can be seen to leak due to the fact that plastic is not filled between the first inner ring molten rib 31 and the first positioning column 3 and between the first outer ring molten rib 32 and the first inner ring molten rib 31, therefore, the heights of the first outer ring molten rib 32, the first inner ring molten rib 31 and the first positioning column 3 from the surface of the plastic body 2 positioned on the same side are sequentially increased, so that the plastic can be encapsulated and welded by the secondarily injected plastic, and leakage is avoided.
The height of the second outer ring molten rib 42 from the side surface 23 is lower than or equal to the height of the second inner ring molten rib 41 from the side surface 23, the height of the second inner ring molten rib 41 from the side surface 23 is lower than or equal to the height of the second positioning column 4 from the side surface 23, preferably, the height of the second outer ring molten rib 42 from the side surface 23 is lower than the height of the second inner ring molten rib 41 from the side surface 23, and the height of the second inner ring molten rib 41 from the side surface 23 is lower than the height of the second positioning column 4 from the side surface 23, so that the design purpose is analyzed as above.
The plastic body 2, the first positioning column 3, the second positioning column 4, the first inner ring molten rib 31, the first outer ring molten rib 32, the second inner ring molten rib 41 and the second outer ring molten rib 42 all comprise the same injection molding material, and the injection molding material is a conventional injection molding material and can be purchased in the market.
When the terminal 1 is arranged into a plurality of terminals 1, the terminals 1 are arranged in parallel, connecting ribs 13 are arranged between every two adjacent terminals 1, the terminals are connected through the connecting ribs 13 when the terminals are embedded and shot with products, movement of the terminals is limited during injection molding, the terminals are stable, and after the shot products are injection molded, the connecting ribs 13 are cut off through a punching die.
The invention also provides an encapsulated injection molding two-shot product for preventing terminal leakage, which is formed by encapsulating plastic by the pre-injection molding one-shot product through a two-shot mold (a finished mold), namely, injecting plastic between adjacent terminals, between inner ring molten ribs and positioning columns and between outer ring molten ribs and inner ring molten ribs for two-shot, wherein the encapsulated injection molding two-shot product comprises an encapsulated plastic body 5 arranged on the periphery of the pre-injection molding one-shot product, and the encapsulated plastic body 5 comprises injection molding materials which are the same as the plastic body 2, the first positioning column 3, the second positioning column 4, the first inner ring molten ribs 31, the first outer ring molten ribs 32, the second inner ring molten ribs 41 and the second outer ring molten ribs 42. The length of the coating plastic body 5 is smaller than that of the terminal 1, so that the two ends of the terminal 1 in the length direction extend out of the coating plastic body 5, namely, the coating plastic body 5 does not cover the terminal 1 completely, the upper surface of the first positioning column 3 is flush with the top surface 6 of the coating plastic body 5, the upper surface of the second positioning column 4, which is far away from the plastic body 2, is flush with the corresponding side surface of the coating plastic body 5, the upper surface of the plastic body 2 and the corresponding side surface of the coating plastic body 5 are positioned on the same side, namely, after secondary encapsulation, the plastic body 2 of the pre-injection one-shot product is wrapped and cannot be seen, only the tops of the first positioning column 3 and the second positioning column 4 and the two ends of the terminal can be seen, so that the terminal can be fixed in the left-right direction, and the terminal of the two-shot product after secondary encapsulation can be ensured to be insulated from the outside.
The shape of the coating plastic body 5 corresponds to the shape of the terminal 1, and the coating plastic body 5 is coated outside the terminal 1, if the terminal 1 is in a strip-shaped structure, the coating plastic body 5 is in a strip-shaped structure, and if the terminal 1 is in an inclined structure, the coating plastic body 5 is also in an inclined structure.
The pre-injection molding one-shot product of the embedded terminal, which is designed by the invention, is characterized in that plastic is injected between two adjacent terminals for secondary encapsulation during secondary encapsulation, so that the positioning between the embedded terminals can be ensured, the thickness of the gap filling glue between the terminals is ensured to be the same, and the electrical breakdown performance of the terminals is ensured.
The pre-injection molding one-shot product provided by the invention is characterized in that a positioning column is designed on a pre-embedded terminal, the positioning column can ensure the accurate positioning of the pre-embedded one-shot product in a secondary injection mold, the problem of inaccurate positioning of a common one-shot product in the secondary injection mold is solved, the electric breakdown conduction, high-voltage performance and external insulation performance of the terminal are ensured, the periphery of the positioning column is provided with a film inner ring melting rib and a film outer ring melting rib, and in the process of pre-injection molding the one-shot product for secondary injection encapsulation, the film melting rib is melted during secondary encapsulation and is fused with plastic for secondary encapsulation, the air tightness of the terminal is ensured, the plug interface terminal is not leaked, and the sealing performance of the product is further ensured.
According to the pre-injection molding one-shot product and the rubber coating injection molding two-shot product, the pre-injection molding one-shot product is designed, the positioning and the melting ribs are added to prevent leakage, and the rubber coating injection molding two-shot product is formed by secondarily injecting the pre-injection molding one-shot product, so that the problems of positioning of a soft terminal, electric breakdown resistance and air tightness can be solved.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911409250.XA CN111037844B (en) | 2019-12-31 | 2019-12-31 | A pre-injection one-shot product and an overmolded two-shot product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911409250.XA CN111037844B (en) | 2019-12-31 | 2019-12-31 | A pre-injection one-shot product and an overmolded two-shot product |
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| Publication Number | Publication Date |
|---|---|
| CN111037844A CN111037844A (en) | 2020-04-21 |
| CN111037844B true CN111037844B (en) | 2025-03-04 |
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|---|---|---|---|---|
| CN212097229U (en) * | 2019-12-31 | 2020-12-08 | 苏州品翔电通有限公司 | Pre-injection-molding one-injection product and rubber-coating injection-molding two-injection product |
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