CN222198352U

CN222198352U - An extrusion die with positive and negative resistance platforms

Info

Publication number: CN222198352U
Application number: CN202420985909.6U
Authority: CN
Inventors: 陶安江
Original assignee: Xingfa Aluminium Chengdu Co ltd
Current assignee: Xingfa Aluminium Chengdu Co ltd
Priority date: 2024-05-08
Filing date: 2024-05-08
Publication date: 2024-12-20
Anticipated expiration: 2034-05-08

Abstract

The utility model discloses an extrusion die with a male and a female blocking table, which comprises an upper die and a lower die which are matched, wherein the cross section of a section bar produced by the extrusion die is provided with a groove structure, the side surface of a feeding material of the lower die is provided with a concave female blocking table, a through die hole is formed in the female blocking table, the shape of the die hole is matched with the outer contour of the cross section of the section bar, a cantilever is formed at the position of the female blocking table corresponding to the groove structure, the side surface of the feeding material of the cantilever is provided with a convex male blocking table, the upper die is provided with a through flow dividing hole, and the flow dividing hole comprises a first flow dividing hole which is opposite to the male blocking table. Compared with the conventional scheme, the extrusion die with the yin-yang blocking table has the advantages that the blocking table structure is added, the flow distribution is more uniform, the die formability, the strength and the stability are improved, the spring deformation is reduced, the cantilever collapse and fracture conditions are not easy to occur, the better forming effect of the profile structure can be ensured, and the profile with complex structure and high extrusion difficulty can be produced normally.

Description

Extrusion die with negative and positive resistance platform

Technical Field

The utility model belongs to the technical field of section extrusion dies, and particularly relates to an extrusion die with a male and female resistance table.

Background

The sectional shape of the existing decorative material profile is shown in fig. 2, and an extrusion die for extrusion molding generally adopts a split die. The basic principle of extrusion molding is to apply a certain pressure to the raw material aluminum bar to flow out from the die hole of the extrusion die and the gap between the die hole and the die core, thereby obtaining the profile with the required cross-sectional shape and size. For example, the profile shown in fig. 2 has two larger groove structures arranged laterally next to each other, and accordingly, in the lower die of the extrusion die, two cantilever structures are present due to the hollowing out of the die holes. And when extrusion molding, the cantilever structure bears larger pressure and is easy to collapse and deform, and aluminum materials are difficult to fill in die holes around the cantilever structure according to the designed flow, so that the problems of instability, difficult molding, easy partial material shortage of sectional materials, non-ideal wall thickness and the like exist, the yield is low, normal production cannot be realized, and the extrusion die is easy to discard and has short service life.

Disclosure of utility model

The utility model aims to solve the technical problems of providing an extrusion die with a male and female resistance table, solving the problems of unstable scheme, difficult molding and the like of the existing die, realizing more uniform flow distribution through structural improvement, improving the die formability and avoiding the die collapse condition.

According to the technical scheme, the extrusion die with the male and female resistance platforms comprises an upper die and a lower die which are matched, the section of a section bar produced by the extrusion die is provided with a groove structure, a concave female resistance platform is arranged on the feeding side face of the lower die, a through die hole is formed in the female resistance platform, the shape of the die hole is matched with the outer contour of the section bar, a cantilever is formed at the position corresponding to the groove structure of the female resistance platform, a convex male resistance platform is arranged on the feeding side face of the cantilever, the upper die is provided with a through diversion hole, and the diversion hole comprises a first diversion hole opposite to the male resistance platform.

Further, the shape and the size of the feeding side of the positive blocking table are smaller than those of the discharging side of the first diversion hole.

Further, the shape of the positive blocking platform is matched with the shape of the groove structure and/or the first diversion holes.

Further, the positive blocking table is in a straight column shape, and the feeding side surface of the positive blocking table is a plane.

Further, the lower die is provided with a concave welding chamber at the feeding side, and the negative resistance table is positioned in the welding chamber.

Further, the first diversion hole is positioned at the middle position of the upper die, and the diversion hole further comprises a plurality of second diversion holes which are arranged at the outer side positions of the first diversion holes in a surrounding mode.

Further, the split holes are in gradually enlarged shapes from the feeding side to the discharging side, and/or the feeding side surface of the upper die is recessed in the outer side position at the middle position.

Further, the section of the profile is overall rectangular with a width greater than a height, and the groove structure at least comprises two grooves which are arranged side by side along the width direction.

Further, in the cross-sectional shape of the profile, there is an inwardly extending necked-down section at the opening of the groove structure.

Further, in the sectional shape of the section bar, a cavity structure is arranged around the groove structure, and the upper die is convexly provided with a die core corresponding to the cavity structure at the discharging side.

Compared with the prior art, the utility model has the following beneficial technical effects:

Compared with the conventional scheme, the extrusion die with the yin-yang blocking table has the advantages that the blocking table structure is added, the flow distribution is more uniform, the die formability, the strength and the stability are improved, the spring deformation is reduced, the cantilever collapse and fracture conditions are not easy to occur, the better forming effect of the profile structure can be ensured, and the profile with complex structure and high extrusion difficulty can be produced normally.

Drawings

FIG. 1 is a schematic perspective view of an extrusion die according to an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional shape of a profile produced by the extrusion die shown in fig. 1.

Fig. 3 is a schematic structural view of an upper die in the extrusion die shown in fig. 1.

Fig. 4 is a schematic view of the structure of a lower die in the extrusion die shown in fig. 1.

FIG. 5 is a schematic diagram of an overall cross-sectional structure of an extrusion die according to an embodiment of the utility model.

Reference numerals in the drawings illustrate:

1. the upper die, 11, the first diversion hole, 12, the second diversion hole, 13, the die core, 2, the lower die, 21, the die hole, 22, the cantilever, 23, the positive resistance table, 24, the negative resistance table, 25, the welding chamber, 3, the section bar, 31, the groove structure, 32, the necking section, 33, the cavity structure, 4 and the die pad.

Detailed Description

The utility model provides an extrusion die with a male and female resistance table, which solves the problems of unstable scheme, difficult molding and the like of the existing die, realizes more uniform flow distribution through structural improvement, increases the die formability, and avoids the die collapse condition.

Referring to fig. 1 to 4, an extrusion die with a male and female die block according to an embodiment of the present utility model includes an upper die 1 and a lower die 2 which are installed in a matching manner. The cross-sectional shape of the profile 3 produced by the extrusion die has a groove structure 31. The lower die 2 is provided with a through die hole 21, and the shape of the die hole 21 is matched (consistent) with the outer contour of the section bar 3. The lower die 2 is formed with a cantilever 22 at a position corresponding to the groove structure 31, and the "cantilever" refers to a structure formed on the lower die base body due to the hollowed-out of the die hole, wherein only one side (upper side in fig. 1) is connected with other parts of the base body, and the other side surfaces are suspended. Since the cantilever is positioned on the lower die, the cantilever bears the extrusion acting force of the aluminum material, so that the cantilever is easy to be deformed and crushed, and even broken.

One of the main improvements of the present solution is that a concave negative block 24 (or called a groove) is provided on the feeding side of the lower die 2, and the die hole 21 and the cantilever 22 are both located in the negative block 24, in other words, a through die hole 21 is formed in the negative block 24, and the negative block 24 is formed with the cantilever 22 at a position corresponding to the groove structure 31. The feeding side of the cantilever 22 is provided with a convex positive blocking table 23 (or called a half core head), the upper die 1 is provided with a through diversion hole, and the diversion hole comprises a first diversion hole 11 opposite to the positive blocking table 23. The male block 23 protrudes toward the feed side, and is called as male, and the feed side of the female block 24 is lower than the feed side of the male block 23 and lower than the feed side of the rest of the lower die 2, and is called as female. The positive resistance table 23 has the main functions of flow division, the negative resistance table 24 has the main functions of flow resistance, the positive resistance table 23 and the negative resistance table 24 form a positive and negative resistance table structure together, and continuous control in the flowing direction of aluminum materials is realized, so that the flow and flow velocity distribution of each position is effectively regulated, the deformation of the cantilever 22 is reduced, and the like.

The main principle of the utility model is as follows. For the existing scheme without a blocking table, the problem of die collapse is serious, so that the section is partially lacked and the ideal required section shape cannot be obtained. The negative and positive platform that hinders that sets up in this scheme can play the reposition of redundant personnel effect, pushes away the aluminium material all around, guarantees the aluminium material volume of its nib all around, and then hinders the platform 24 through the yin around and carry out the choked flow, realizes adjusting the velocity of flow and strengthening the seam, has also reduced the pressure that the cantilever bore simultaneously, has avoided the mould to warp to can take shape better.

More specifically, the shape and size of the feeding side of the positive blocking platform 23 are smaller than those of the discharging side of the first diversion holes 11, in other words, the positive blocking platform 23 is included in the projection range of the first diversion holes 11 as seen from the view of fig. 1, so that the aluminum material flows from between the positive blocking platform 23 and the first diversion holes 11 more easily. Optionally, the shape of the positive stop 23 matches the shape of the groove structure 31 and/or the first diversion aperture 11, e.g. in the embodiment shown in fig. 1, the shape of the positive stop 23, the groove structure 31, the first diversion aperture 11 are all substantially rectangular. Alternatively, the positive stop 23 is in a shape of a right cylinder, and the feeding side of the positive stop 23 is a plane, for example, in the embodiment shown in fig. 1, the positive stop 23 is generally in a rectangular parallelepiped shape. It will be appreciated that in other embodiments, it is also contemplated that the positive stop 23 may be configured in other shapes, or have a partial shape with a size larger than the first diversion aperture 11, and that the height of the positive stop 23, the size of the negative stop 24, etc. may be designed as desired to adjust the flow rate and distribution of the aluminum material.

Referring to fig. 4 and 5, the lower die 2 is provided with a concave bonding chamber 25 at the feeding side, and the negative resistance table 24 is located in the bonding chamber 25. The weld chamber 25 is shaped to match the discharge side outer contour of the outermost diverter hole, and the female dam 24 matches the outer contour of the die hole 21 and includes cantilever 22. In the scheme, two welding processes generated by the welding chamber 25 and the negative resistance table 24 exist in the section forming process, so that the welding effect is further ensured, defects are avoided, and the section quality is improved.

Referring to fig. 3, the first diversion hole 11 is located at a middle position of the upper die 1, and the diversion hole further includes a plurality of second diversion holes 12, where the second diversion holes 12 are disposed around an outer side of the first diversion hole 11, and a diversion bridge is formed between the diversion holes, so as to divert the aluminum material, and then weld the aluminum material on a feeding side of the lower die 2. In a preferred embodiment, the flow dividing holes are each gradually enlarged from the inlet side to the outlet side, as shown in fig. 3, the flow dividing Kong Shixian is defined by the inlet side and the dotted lines are defined by the inner wall of the hole and the outlet side. And preferably, the feeding side surface of the upper die 1 is recessed at the middle position at the outer position, in other words, the first diversion hole 11 and the diversion bridge around it are of a sunken structure, thereby facilitating pressure relief.

Further, referring to fig. 2, the section of the profile 3 is generally rectangular with a width greater than a height, and the groove structure 31 includes at least two grooves arranged side by side along the width direction. The sectional shape of the profile 3 is basically symmetrical, and two cantilevers 22 of the lower die 2 corresponding to the two groove structures 31 are positioned at the middle part, so that the condition of non-ideal wall thickness of the profile due to deformation is more likely to occur. And, in the cross-sectional shape of the section bar 3, there is a necking section 32 extending inwards at the opening of the groove structure 31, and the connecting part of the cantilever 22 is narrower, so that the collapse is more likely to occur. The scheme is particularly suitable for the conditions, and the forming effect of the profile can be obviously improved. In addition, in the cross-sectional shape of section bar 3, have cavity structure 33 around groove structure 31, go up mould 1 and be provided with the mold core 13 corresponding with cavity structure 33 in ejection of compact side protrusion, this kind of section bar structure is more complicated, and the requirement of split design is relatively higher, adopts this scheme also can adjust flow and distribution more nimble through the design of holding up the platform, guarantees that the wall thickness condition is more ideal.

Referring to fig. 5, in the preferred embodiment, the die hole 21 has a first-stage hollow blade, a second-stage hollow blade and a third-stage hollow blade which are sequentially arranged and gradually enlarged at the discharging side, so as to ensure the surface quality of the profile during discharging. And a die pad 4 is preferably arranged on the discharging side of the lower die 2, so that a supporting effect is further provided, and the lower die 2 is prevented from being deformed.

In conclusion, compared with the conventional scheme, the extrusion die with the male and female blocking table has the advantages that the blocking table structure is increased, the split flow is more uniform, the die formability, strength and stability are improved, the deformation is reduced, cantilever collapse and fracture are not easy to occur, the forming effect of the profile structure is better, and the profile with complex structure and high extrusion difficulty can be normally produced.

Claims

1. The extrusion die with the male and female resistance platforms comprises an upper die (1) and a lower die (2) which are matched, and is characterized in that the cross section of a section bar (3) produced by the extrusion die is provided with a groove structure (31), a concave female resistance platform (24) is arranged on the feeding side surface of the lower die (2), a through die hole (21) is formed in the female resistance platform (24), the shape of the die hole (21) is matched with the outer contour of the cross section of the section bar (3), a cantilever (22) is formed at the position corresponding to the groove structure (31) on the female resistance platform (24), a convex male resistance platform (23) is arranged on the feeding side surface of the cantilever (22), a through flow dividing hole is formed in the upper die (1), and a first flow dividing hole (11) opposite to the male resistance platform (23) is formed in the flow dividing hole.

2. Extrusion die with male and female resistance table according to claim 1, characterized in that the shape size of the feed side of the male resistance table (23) is smaller than the shape size of the discharge side of the first tap hole (11).

3. Extrusion die with male and female impedance blocks according to claim 1, characterized in that the shape of the male impedance blocks (23) matches the shape of the groove structure (31) and/or the first tap hole (11).

4. Extrusion die with male and female resistance table according to claim 1, characterized in that the male resistance table (23) is in the shape of a right cylinder, and the feeding side of the male resistance table (23) is a plane.

5. Extrusion die with male and female resistance table according to claim 1, characterized in that the lower die (2) is provided with a concave soldering chamber (25) at the feed side, and the female resistance table (24) is located in the soldering chamber (25).

6. Extrusion die with male and female impedance block according to any of claims 1-5, characterized in that the first tapping hole (11) is located in a middle position of the upper die (1), the tapping hole further comprising a plurality of second tapping holes (12), the second tapping holes (12) being arranged around the outer position of the first tapping holes (11).

7. Extrusion die with male and female resistance table according to claim 6, characterized in that the flow dividing holes are of gradually expanding shape from the feed side to the discharge side and/or the feed side of the upper die (1) is recessed in the outer side position at the middle position.

8. Extrusion die with male and female resistance table according to any of claims 1-5, characterized in that the cross-sectional shape of the profile (3) as a whole is rectangular with a width greater than the height, the groove structure (31) comprising at least two side-by-side in the width direction.

9. Extrusion die with male and female resistance table according to any of claims 1-5, characterized in that in the cross-sectional shape of the profile (3) there is an inwardly extending necked section (32) at the opening of the groove structure (31).

10. Extrusion die with male and female resistance table according to any of claims 1-5, characterized in that in the cross-sectional shape of the profile (3) around the groove structure (31) there is a cavity structure (33), the upper die (1) being convexly provided with a die core (13) corresponding to the cavity structure (33) on the discharge side.