KR20250110955A - Composite material parts forming apparatus and composite material parts formed thereby - Google Patents

Abstract

A plastic composite material part molding device is disclosed. According to an exemplary embodiment of the disclosed present invention, a plastic composite material part molding device molds a composite material molding source into a shape set by a press mold and insert-moldes a plastic material injection member into the composite material molding source, and includes a mold pin mounted on the press mold, wherein the mold pin may include a core portion coupled to the press mold, a pin portion extended from the core portion, and a protrusion formed on the pin portion to secure the injection member.

Description

Plastic composite material parts forming apparatus and plastic composite material parts formed therewith {COMPOSITE MATERIAL PARTS FORMING APPARATUS AND COMPOSITE MATERIAL PARTS FORMED THEREBY}

The present invention relates to a plastic composite material molded structure, and more specifically, to a plastic composite material part molding device for molding a plastic composite material part such as a body panel, and a plastic composite material part molded using the same.

Typically, multiple panel parts are assembled into a vehicle body. Examples of panel parts include side outer panels, roof panels, and hood panels.

These panels are manufactured by forming steel blanks using a press mold.

However, in the case of this forming method, the development period of the press mold is long and the development cost can also be excessive. In addition, a painting process is also required to paint the press-formed steel material panels.

Accordingly, recently, a molding technology for plastic composite panels is being introduced that is advantageous for small-scale production of panels, can help reduce the weight of vehicles, and does not require painting.

Plastic composite panels can be manufactured by forming a plastic composite molding source into a set shape using a press molding machine.

The above plastic composite panel can be assembled with a related part (e.g., a car body) through a fastening member (commonly referred to as 'hardware' by those skilled in the art) consisting of a combination of bolts and nuts.

For this purpose, the plastic composite panel is provided with, in one example, a nut insert-molded into the boss portion (commonly referred to by those skilled in the art as an 'insert nut'). The plastic composite panel can be joined to the corresponding component by a bolt fastened to the nut.

Here, the nut is fixed to a mold pin installed in a press mold, and can be fixed while being inserted into the mold source during press molding of the mold source. Those skilled in the art call this insert molding method of the nut an in-mold molding method.

However, if the nut is not tightly fitted to the mold pin or there is no sealing between the mold pin and the nut, the molding source may flow into the nut and harden. This may cause quality problems in the plastic composite panel.

To improve this, as an example of a method other than the above-mentioned in-mold molding method, there is a method of inserting a nut into the boss of a plastic composite panel after molding is completed (this is commonly referred to as the 'post-pressure method' by those skilled in the art).

However, since the plastic composite panel is usually a thermosetting plastic composite material containing a thermosetting resin, it is not suitable for applying the post-pressure method of inserting a nut into the boss of the plastic composite panel.

The information contained in this background section has been prepared to promote understanding of the background of the invention and may include matters that are not prior art and are already known to those skilled in the art.

An embodiment of the present invention is to provide a plastic composite material part molding device capable of joining a fastening member such as a nut in a post-pressure manner.

In addition, an embodiment of the present invention provides a plastic composite material part having an injection-molded plastic material insert formed therein, which can join a fastening member such as a nut in a post-pressure manner.

A plastic composite material part molding device according to an embodiment of the present invention molds a composite material molding source into a shape set by a press mold, and insert-moldes a plastic material injection member into the composite material molding source, and includes a mold pin mounted on the press mold, and the mold pin may include a core portion coupled to the press mold, a pin portion extended from the core portion, and a protrusion formed on the pin portion to fix the injection member.

In addition, in the plastic composite material part molding device according to the embodiment of the present invention, the mold pin can be mounted on the upper mold of the press mold.

In addition, in the plastic composite material part molding device according to the embodiment of the present invention, the pin portion can be fitted in the vertical direction into an insert groove formed in the injection member.

In addition, in the plastic composite material part molding device according to the embodiment of the present invention, the pin portion can be forcibly fitted into the insert groove by the protrusion portion.

In addition, in the plastic composite material part molding device according to the embodiment of the present invention, the protrusion may include a plurality of spot protrusions protruding in an island type along the radial direction of the pin portion.

In addition, in the plastic composite material part molding device according to the embodiment of the present invention, the protrusion may include a flange projection that protrudes in a flange shape along the radial direction of the pin portion.

And, a plastic composite material part according to an embodiment of the present invention is formed by using a plastic composite material part forming apparatus as described above, and may include i) a molded main body part formed of a composite molding source and formed into a shape set by a press mold, ii) at least one boss part protruding from the molded main body part, and iii) an injection molded plastic material part having an insert groove formed by being inserted and fixed into the at least one boss part by a mold pin and capable of being joined with the mold pin and a fastening member.

Additionally, in the plastic composite material part according to the embodiment of the present invention, the injection molded member may include at least one undercut formed on an outer surface.

In addition, in the plastic composite material part according to the embodiment of the present invention, the composite material molding source may be a thermosetting material including a fiber material.

Additionally, in the plastic composite material part according to the embodiment of the present invention, the injection member may be a thermoplastic plastic material.

In addition, in the plastic composite material part according to the embodiment of the present invention, a nut may be inserted as the fastening member into the insert groove.

In addition, in the plastic composite material part according to the embodiment of the present invention, a bolt may be fastened as the fastening member to the insert groove.

Additionally, the plastic composite material part according to an embodiment of the present invention may be a hood panel.

According to an embodiment of the present invention, molding defects of a plastic composite material part can be minimized, durability of the plastic composite material part can be secured, and the plastic composite material part can be fastened to a related part using various fastening methods.

In addition, the effects that can be obtained or expected by the embodiments of the present invention will be directly or implicitly disclosed in the detailed description of the embodiments of the present invention. That is, the various effects expected according to the embodiments of the present invention will be disclosed in the detailed description to be described later.

Since these drawings are for reference in explaining exemplary embodiments of the present invention, the technical ideas of the present invention should not be interpreted as limited to the attached drawings.
FIG. 1 is a drawing schematically illustrating a plastic composite material part molding device according to an embodiment of the present invention.
FIG. 2 is a drawing schematically illustrating a plastic composite material part molded by a plastic composite material part molding device according to an embodiment of the present invention.
FIG. 3 is a perspective view illustrating a plastic composite material part molded by a plastic composite material part molding device according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view illustrating a plastic composite material part molded by a plastic composite material part molding device according to an embodiment of the present invention.
FIG. 5 is a perspective view illustrating a mold pin applied to a plastic composite material part molding device according to an embodiment of the present invention.
FIG. 6 is a cross-sectional view illustrating a mold pin applied to a plastic composite material part molding device according to an embodiment of the present invention.
FIG. 7 is a drawing illustrating an example of a body joint structure of a plastic composite material part molded using a plastic composite material part molding device according to an embodiment of the present invention.
FIG. 8 is a drawing illustrating another example of a body joint structure of a plastic composite material part molded using a plastic composite material part molding device according to an embodiment of the present invention.
FIG. 9 is a drawing illustrating a modified example of a mold pin applied to a plastic composite material part molding device according to an embodiment of the present invention.
FIGS. 10A and 10B are drawings illustrating modified examples of injection molding members applied to plastic composite parts molded by a plastic composite part molding device according to an embodiment of the present invention.
It should be understood that the drawings referenced above are not necessarily drawn to scale, but rather present rather simplified representations of various preferred features that illustrate the basic principles of the present invention. For example, the specific design features of the present invention, including specific dimensions, orientations, locations, and shapes, will be determined in part by the particular intended application and usage environment.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should also be understood that the terms “comprises” and/or “comprising” as used herein indicate the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, and/or groups thereof.

As used herein, the term 'and/or' includes any and all combinations of one or more of the associated listed items.

The term 'coupled' in this specification indicates a physical relationship between two components in which the components are directly connected to each other or indirectly connected through one or more intermediary components.

As used herein, the terms 'vehicle', 'vehicle', 'automobile' or other similar terms used herein generally include passenger automobiles, including passenger cars, sport utility vehicles (SUVs), buses, trucks, various commercial vehicles, and also include hybrid automobiles, electric automobiles, hybrid-electric automobiles, electric-based Purpose Built Vehicles (PBVs), hydrogen-powered vehicles and other alternative fuel vehicles (e.g., fuels derived from resources other than petroleum).

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

FIG. 1 is a drawing schematically illustrating a plastic composite material part molding device according to an embodiment of the present invention.

Referring to FIG. 1, a plastic composite material part molding device (100) according to an embodiment of the present invention can be applied to a process of manufacturing a plastic composite material part (200) of a set shape, for example, a part to be assembled into a car body.

The plastic composite material part (200) according to an embodiment of the present invention may be, in one example, a hood panel (1) of a vehicle.

Furthermore, the plastic composite material part (200) according to the embodiment of the present invention can be fastened to the vehicle body (3) by a fastening member (10) composed of a combination of bolts and nuts, as shown in FIG. 2.

Referring to FIGS. 1 and 2, a plastic composite material part molding device (100) according to an embodiment of the present invention press-moldes a composite material molding source (5) into a shape set by a press mold (20) and manufactures the above-described plastic composite material part (200).

Here, the composite molding source (5) may be a thermosetting material including a fiber material (7) and a thermosetting resin. The fiber material (7) may include, for example, one or more fibers among carbon fiber, glass fiber, and aramid fiber.

And, the composite molding source (5) may include a polyurethane compound. Such a composite molding source (5) is obvious to those skilled in the art, and thus a detailed description thereof is omitted.

FIG. 3 is a perspective view illustrating a plastic composite material part molded by a plastic composite material part molding device according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view illustrating a plastic composite material part molded by a plastic composite material part molding device according to an embodiment of the present invention.

Referring to FIGS. 3 and 4, the plastic composite material part (200) according to an embodiment of the present invention includes a molded main body part (120), at least one boss part (140), and a plastic material injection member (160).

In an embodiment of the present invention, the molding main body part (120) is formed of a composite molding source (5) and can be molded into a shape set by a press mold (20) (see FIG. 1 below). In one example, the molding main body part (120) can be provided as a panel main body part (e.g., a plate part) of a hood panel (1).

In an embodiment of the present invention, at least one boss portion (140) protrudes upward from the molded body portion (120) based on the drawing.

The above at least one boss portion (140) can be formed together with the molding body portion (120) at a height set by the press mold (20).

And, in an embodiment of the present invention, the injection member (160) may be provided as an insert inserted into at least one boss portion (140) during molding of the molding main body portion (120) and at least one boss portion (140).

The above injection member (160) can be mounted on a press mold (20). When the press mold (20) operates, the above injection member (160) can be inserted into at least one boss portion (140) and fixed to at least one boss portion (140).

The above injection member (160) can be manufactured in various shapes and sizes depending on the intended use of the plastic composite material part (200).

The above injection member (160) can be fastened to the body (3) by a fastening member (10) as shown in FIG. 2.

Such an injection member (160) can be manufactured by a method of injection molding a plastic material using an injection molding machine that is obvious to those skilled in the art. In one example, the injection member (160) can be formed of a thermoplastic plastic material.

In this specification, the 'upper part', 'upper part', 'top' or 'upper surface' of a component represents an end, section, section, or surface of the component that is relatively upper in the drawing, and the 'lower part', 'lower part', 'lower part' or 'lower surface' of a component represents an end, section, section, or surface of the component that is relatively lower in the drawing.

Additionally, in the present specification, the term "end" of a component (e.g., one end, the other end, or both ends, etc.) indicates an end of the component in any one direction, and the term "end" of a component (e.g., one end, the other end, both ends, a front end, or a rear end, etc.) indicates a portion of the component that includes that end.

Meanwhile, referring to FIGS. 1 and 2, the plastic composite material part molding device (100) according to an embodiment of the present invention is configured to insert-mold a plastic material injection member (160) into at least one boss portion (140) when molding a composite material molding source (5) using a press mold (20).

To this end, the press mold (20) of the plastic composite material part molding device (100) according to the embodiment of the present invention includes a lower mold (21), an upper mold (31), and a mold pin (50).

The above lower mold (21) is fixed to the floor of the process workshop. The upper mold (31) is installed so as to be able to move up and down in response to the lower mold (21).

The above upper mold (31) presses the gel-type composite molding source (5) sprayed onto the lower mold (21), and can mold a plastic composite material part (200) according to an embodiment of the present invention.

In an embodiment of the present invention, the mold pin (50) is mounted on the upper mold (31). The mold pin (50) is configured to secure an injection member (160) to be inserted into a composite molding source (5) when the upper mold (31) is operated.

The above mold pin (50) can insert the injection member (160) into at least one boss portion (140) by the operation of the upper mold (31) while fixing the injection member (160). In addition, the mold pin (50) can be separated from the injection member (160) by the operation of the upper mold (31) while fixing the injection member (160) to at least one boss portion (140) by the hardening of the composite molding source (5).

FIG. 5 is a perspective view illustrating a mold pin applied to a plastic composite material part molding device according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view illustrating a mold pin applied to a plastic composite material part molding device according to an embodiment of the present invention.

Referring to FIGS. 5 and 6, the mold pin (50) according to the embodiment of the present invention includes a core portion (51), a pin portion (53), and a protrusion portion (55).

The core part (51) is joined to the upper mold (31) of the press mold (20). In one example, the core part (51) is arranged in the up-down direction and may be provided as a block in the shape of a cylinder. This core part (51) may be joined to the upper mold (31) by a bolting method, a welding method, or a forced-fit method.

The above pin portion (53) extends downward from the lower end of the core portion (51) with an outer diameter smaller than the outer diameter of the core portion (51) so that it can be fitted in the upper and lower direction to the injection member (160). In one example, the pin portion (53) can be integrally connected to the lower end of the core portion (51) as shown in the drawing.

Here, the injection member (160) may be provided in the form of a cap block with an open upper end and a closed lower end based on the drawing. This injection member (160) includes an insert groove (161) that can be fitted into the pin portion (53) in a vertical direction.

In an embodiment of the present invention, the above-described protrusion (55) is configured to secure an injection member (160) that is fitted vertically into the pin portion (53) through an insert groove (161) to the pin portion (53). The above-described protrusion (55) is formed on the pin portion (53).

The above protrusion (55) is formed on the upper side of the pin portion (53) at the lower side of the core portion (51). In one example, the protrusion (55) includes a plurality of spot protrusions (61).

The above spot protrusions (61) are formed in an island type protruding along the radial direction on the upper part of the pin portion (53).

Accordingly, the injection member (160) is fitted vertically into the pin portion (53) of the mold pin (50) through the insert groove (161), and the pin portion (53) can be forcibly fitted into the insert groove (161) of the injection member (160) by the spot protrusions (61) of the protrusions (55). Furthermore, the upper surface of the injection member (160) can support the lower surface of the core portion (51).

Hereinafter, a process of molding a plastic composite material part (200) using a plastic composite material part molding device (100) according to an embodiment of the present invention configured as described above will be described in detail with reference to FIGS. 1 to 6.

First, in an embodiment of the present invention, a gel-type composite molding source (5) is sprayed onto the lower die (21) of a press mold (20).

At this time, the upper mold (31) of the press mold (20) is in a state of being moved upward. In addition, a mold pin (50) is installed in the upper mold (31), and an injection molded part (160) made of plastic material is fixed to the pin portion (53) of the mold pin (50).

Here, the injection member (160) is fitted into the pin portion (53) in the vertical direction through the insert groove (161). At this time, the injection member (160) is forcibly fitted into the pin portion (53) by the spot protrusions (61) of the protrusions (55) formed on the pin portion (53) while supporting the lower surface of the core portion (51) through the upper surface.

Then, when the upper mold (31) of the press mold (20) moves downward and merges with the lower mold (21), a molding body part (120) of a set shape and at least one boss part (140) are molded by the flow of the composite molding source (5).

In this process, an injection member (160) fixed to the pin portion (53) of the mold pin (50) is inserted into at least one boss portion (140).

Here, since the injection member (160) supports the lower surface of the core portion (51) through the upper surface and is forcibly joined to the pin portion (53) by the spot protrusions (61), even if an external force is applied to the injection member (160), it does not shake or twist in the mold pin (50) and can be inserted into at least one boss portion (140).

Next, when the composite molding source (5) is hardened, the injection member (160) is fixed to at least one boss portion (140). Then, the upper die (31) of the press mold (20) is released from the lower die (21).

Accordingly, with the injection member (160) fixed to at least one boss portion (140), as the upper mold (31) is released from the lower mold (21), the mold pin (50) is separated from the injection member (160).

Accordingly, through a series of processes as described above, the production of a plastic composite material part (200) according to an embodiment of the present invention, in which a plastic injection molded member (160) is inserted into at least one boss portion (140), is completed.

Meanwhile, when the molding of the plastic composite material part (200) according to the embodiment of the present invention is completed, as shown in FIG. 7, a nut (11) can be inserted as a fastening member (10) into the insert groove (161) of the injection member (160).

For example, the above nut (11) can be inserted into the insert groove (161) of the injection member (160) in a forced fit manner. Those skilled in the art commonly call such a nut (11) a 'post-pressure nut'.

Accordingly, the plastic composite material part (200) according to the embodiment of the present invention can be assembled with the vehicle body (3) by a bolt (13) fastened to a nut (11).

On the other hand, when the molding of the plastic composite material part (200) according to the embodiment of the present invention is completed, as shown in FIG. 8, a bolt (13) can be fastened as a fastening member (10) to the insert groove (161) of the injection member (160).

In one example, the bolt (13) can be fastened to a screw thread machined on the inner surface of the insert home (161).

In another example, the bolt (13) may be directly fastened to the insert groove (161). That is, the bolt (13) may be fastened to a screw thread formed by being screwed into the inner surface of the insert groove (161).

Accordingly, the plastic composite material part (200) according to the embodiment of the present invention can be assembled with the vehicle body (3) by a bolt (13) fastened to the insert groove (161) of the injection member (160).

The plastic composite material part molding device (100) according to the embodiment of the present invention as described so far insert-moldes injection parts (160) of various shapes and sizes into a composite material molding source (5), and can manufacture a plastic composite material part (200) such as a hood panel (1).

A plastic composite material part (200) like this can be formed by applying a nut (11) inserted into an injection molded member (160) or applying a bolt (13) directly fastened to an injection molded member (160) when the molding is completed by a plastic composite material part molding device (100) according to an embodiment of the present invention.

Accordingly, the plastic composite material part (200) according to an embodiment of the present invention can be fastened to a related part (e.g., a car body) in various fastening methods.

In addition, since the plastic composite material part molding device (100) according to an embodiment of the present invention insert-moldes an injection member (160) into a composite material molding source (5), unlike the in-mold molding method of the prior art, it can solve the quality problem of the composite material molding source (5) getting caught in the nut (11).

Furthermore, the plastic composite material part (200) according to the embodiment of the present invention can secure improved durability and can be repeatedly reused by the nut (11) and bolt (13) applied to the injection member (160).

Furthermore, the plastic composite material part molding device (100) according to an embodiment of the present invention can minimize molding defects of the plastic composite material part (200) because it applies a nut (11) and a bolt (13) to the injection member (160) even if a partial molding defect of at least one boss portion (140) occurs.

FIG. 9 is a drawing illustrating a modified example of a mold pin applied to a plastic composite material part molding device according to an embodiment of the present invention.

Referring to FIG. 9, as a modified example of the mold pin (250) according to an embodiment of the present invention, the protrusion (255) may include a flange protrusion (261) formed along the radial direction on the upper portion of the pin portion (253).

The above flange projection (261) protrudes in a flange shape (or ring shape) along the radial direction from the upper portion of the pin portion (253), and in one example, may be formed in a semicircular cross-sectional shape.

FIGS. 10A and 10B are drawings illustrating modified examples of injection molding members applied to plastic composite parts molded by a plastic composite part molding device according to an embodiment of the present invention.

Referring to FIGS. 10A and 10B, modified examples of the injection member (360) according to an embodiment of the present invention include at least one undercut (363) formed on the outer surface of the injection member (360).

The above at least one undercut (363) protrudes radially from the outer surface of the injection member (360).

In one example, the at least one undercut (363) may include a stem-shaped undercut protrusion (365), as illustrated in FIG. 10a. In another example, the at least one undercut (363) may include a hook-shaped undercut protrusion (367), as illustrated in FIG. 10b.

Accordingly, the bonding force between the composite molding source (not shown) and the injection member 360) can be improved in at least one boss portion (not shown), and the mold pin (not shown) can be easily separated from the injection member (360).

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications may be made within the scope of the claims, the detailed description of the invention, and the attached drawings, which also fall within the scope of the present invention.

1: Hood panel 3: Body
5: Composite molding source 7: Fiber material
10: Fastener 11: Nut
13: Bolt 20: Press Mold
21: Lower type 31: Upper type
250, 50: Mold pin 51: Core part
53, 253: pin 55, 255: protrusion
61: Spot bump
100: Plastic composite material part molding device
120: Plastic body part 140, 340: Boss part
160, 360: Injection part 161: Insert home
200: Plastic composite parts
261: Flange protrusion 363: Undercut
365, 367: Undercut protrusion

Claims (11)

A plastic composite material part molding device that molds a composite material molding source into a shape set by a press mold and insert-moldes a plastic material injection member into the composite material molding source.
A mold pin mounted on the above press mold;
Including,
A plastic composite material part molding device, wherein the mold pin comprises a core portion coupled to the press mold, a pin portion extended from the core portion, and a protrusion formed on the pin portion to secure the injection member. In the first paragraph,
The above mold pins,
A plastic composite material part molding device mounted on the upper mold of the above press mold. In the first paragraph,
The above pin part,
It is fitted in the upper and lower direction into the insert groove formed in the above injection member,
A device for forming a plastic composite material part that is forcibly fitted into the insert groove by the above protrusion. In the first paragraph,
The above protrusion is,
A plastic composite material part molding device including a plurality of spot protrusions protruding in an island type along a radial direction on the above pin portion. In the first paragraph,
The above protrusion is,
A plastic composite material part molding device including a flange projection protruding in a flange shape along a radial direction on the above pin portion. A plastic composite material part molded using a plastic composite material part molding device according to any one of claims 1 to 5,
A molded body portion made of a composite molding source and molded into a shape set by a press mold;
At least one boss portion protruding from the above molded body portion; and
An injection-molded plastic member that is inserted and fixed into at least one boss portion by a mold pin and has an insert groove formed that can be combined with the mold pin and a fastening member;
A plastic composite part comprising: In Article 6,
The above injection member is,
A plastic composite part comprising at least one undercut formed on an outer surface. In Article 6,
The above composite molding source is a thermosetting material containing a fiber material,
The above injection-molded member is a plastic composite material part made of a thermoplastic plastic material. In Article 6,
A plastic composite material part in which a nut is inserted as a fastening member into the above insert home. In Article 6,
A plastic composite material part in which a bolt is fastened as a fastening member to the above insert home. In Article 6,
A plastic composite material part wherein the above plastic composite material part is a hood panel.