Support structure for improving flash on encapsulation mold

Abstract

The utility model provides a kind of support structure for improving encapsulation mould flashing, including mould seat, the top of the mould seat is provided with mould, the mould includes the lower mould of fixed installation in the top of the mould seat and the upper mould of mutually cooperation with the lower mould, the lower mould and the upper mould are surrounded with the forming cavity for placing precast piece and for encapsulation layer forming between the upper mould.The first hydraulic cylinder can drive the second mounting disc to move in the utility model, the linkage of first connecting rod, second connecting rod and first hinged seat can drive multiple annularly distributed support parts to open or shrink synchronously, so as to change the diameter of annular support structure formed by multiple support parts, facilitate to adapt to tubular precast piece of different inner diameter, without customizing special insert for precast piece of different inner diameter, greatly reduce production cost, improve overall versatility.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and more specifically, to a support structure for improving the flash of an overmolding mold. Background Technology

[0002] Flash, also known as burrs, overflow, or excess material in the injection molding industry, is a common product defect. For the overmolding process of hollow tubular preforms, this defect is often directly related to the deformation of the preform during injection molding. During the overmolding process of hollow tubular parts, when the overmolding material is injected into the mold, the high temperature and pressure of the material cause the tubular part to deform, resulting in gaps between the deformed part and the mold. The material flows into these gaps, ultimately forming flash.

[0003] A search revealed Chinese patent application number 202223305654.4, which discloses a support structure for improving burr formation in overmolding molds. The structure includes an insert mounted on a mold base. The cross-sectional shape of the insert is identical to that of the cavity in the preform. The distance from the inlet of the preform cavity to the injection molded part is a length of one. The insert extends into the cavity of the preform, and the insertion depth of the insert is greater than the length of one. This invention, by incorporating an insert that is inserted into the interior of the preform, strengthens the preform and makes it more difficult for the preform to deform during injection molding, thereby reducing the problem of burrs. However, the aforementioned patents have the following shortcomings: the inserts cannot be adjusted according to the diameter of the tubular preform; when encapsulating tubular preforms with different inner diameters, inserts of corresponding diameters need to be customized, increasing production costs. Furthermore, the inserts' function of preventing preform deflection or cavity outlet deflection relies on the cooperation between the positioning groove on the insert and the positioning rod inside the preform. If the positioning rod cannot be pre-installed in the preform, this function cannot be achieved, resulting in low applicability. Therefore, this utility model proposes a new solution. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the above-mentioned applications where the insert cannot be adjusted according to the diameter of the tubular preform. When applying rubber coating to tubular preforms with different inner diameters, inserts of corresponding diameters need to be customized, which increases production costs. Moreover, the function of the insert to prevent the preform from deflecting or the cavity outlet from deflecting relies on the positioning groove on the insert cooperating with the positioning rod in the preform. If the positioning rod cannot be reserved in the preform, this function cannot be realized, resulting in low applicability. Therefore, this utility model proposes an improved support structure for the burr of the rubber coating mold.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A support structure for improving the flash of an overmolding die includes a die base, a die on the top of the die base, the die including a lower die fixedly mounted on the top of the die base and an upper die cooperating with the lower die, a forming cavity for placing a preform and for forming an overmolding layer is formed between the lower die and the upper die, and a plurality of drive assemblies mounted on the die base, the number of drive assemblies being the same as the number of openings in the preform, and further including: An adjustment component is fixedly installed on the moving end of the drive component. The adjustment component includes a mounting base connected to the moving end of the drive component. A first hydraulic cylinder is installed inside the mounting base, and an adjustment frame is installed on the moving end of the first hydraulic cylinder. The adjusting frame includes a first mounting plate and a second mounting plate arranged symmetrically. The first mounting plate is fixedly connected to the end face of the mounting base away from the drive assembly. A pull rod is fixedly connected to the end of the second mounting plate facing the first mounting plate. The end of the pull rod away from the second mounting plate is connected to the moving end of the first hydraulic cylinder. A plurality of annularly distributed first connecting rods are hinged to the outer wall of the first mounting plate. A plurality of annularly distributed second connecting rods are hinged to the outer wall of the second mounting plate. A first hinge seat that is rotatably connected to the first connecting rod and the second connecting rod on the same straight line is provided between the first connecting rod and the second connecting rod. Multiple support parts are arranged in a ring on the outside of the adjustment frame and are fixedly connected to the outer wall of the first hinge seat. The lower mold and the upper mold are both provided with insertion holes that cooperate with the support parts. The insertion holes are connected to the inside of the molding cavity. Multiple anti-slip strips are fixedly installed on the support part through multiple grooves evenly opened on the outer wall of the support part, and the anti-slip strips protrude from the surface of the support part.

[0006] As a preferred technical solution of this utility model, the driving component includes a second hydraulic cylinder fixedly mounted on the mold base by a bracket, and the moving end of the second hydraulic cylinder is fixedly connected to a slider seat that is slidably connected to the mold base. The slider seat has an installation groove on its side wall facing the mounting base.

[0007] As a preferred technical solution of this utility model, the mounting base includes a hollow seat body for mounting the first hydraulic cylinder, and a fixing plate is fixedly connected to the end of the seat body. The fixing plate is detachably mounted on the slider seat by means of a first bolt and a mounting groove.

[0008] As a preferred technical solution of this utility model, the support part includes a base plate fixedly connected to the top of the first hinge seat, and a pad is provided on the top of the base plate.

[0009] As a preferred technical solution of this utility model, both the pad and the anti-slip strip are made of elastic material, and each of the four corners of the base plate is provided with a second bolt that is threadedly connected to the pad.

[0010] As a preferred technical solution of this utility model, both the first mounting plate and the mounting base are provided with through holes that cooperate with the pull rod. The outer wall of the first mounting plate is fixedly connected with a plurality of second hinge seats that cooperate with the first connecting rod, and the outer wall of the second mounting plate is fixedly connected with a plurality of third hinge seats that cooperate with the second connecting rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: In the solution of this utility model: 1. The improved support structure for burrs in overmolding molds allows the drive assembly to extend multiple support parts on the adjustment frame into the interior of the preform through insertion holes and openings on the preform during use, supporting its inner wall. This prevents deformation of the hollow tubular preform caused by the pressure of the overmolding material injection, thereby reducing the problem of burrs formed due to preform deformation. Simultaneously, the first hydraulic cylinder can drive the second mounting plate to move. By using the linkage of the first connecting rod, the second connecting rod, and the first hinge seat, multiple annularly distributed support parts can be opened or closed synchronously, thereby changing the diameter of the annular support structure formed by the multiple support parts. This facilitates adaptation to tubular preforms with different inner diameters, eliminating the need to customize special inserts for preforms with different inner diameters, significantly reducing production costs and improving overall versatility. 2. This improved support structure for the overmolding die features multiple annularly distributed support sections that provide uniform support from multiple directions along the inner wall of the preform cavity. Combined with anti-slip strips protruding from the support surface, this increases friction with the inner wall of the preform, preventing relative sliding between the support structure and the preform. Simultaneously, friction secures the preform, eliminating the need for special structures like pre-reserved positioning rods within the preform. This solves the problem of ineffective anti-deflection in existing solutions due to the lack of positioning rods in the preform, thus improving overall applicability. Attached Figure Description

[0012] Figure 1 A schematic diagram illustrating the use of the support structure for improving the flash of overmolding provided by this utility model: Figure 2 A schematic diagram of the insertion hole structure of the support structure for improving the burrs of the overmolding mold provided by this utility model; Figure 3 A schematic diagram of the overall structure of the support structure for improving the burrs of the overmolding mold provided by this utility model; Figure 4 An exploded view of the support structure for improving the burr of the overmolding mold provided by this utility model; Figure 5A schematic diagram of the internal structure of the support structure for improving the burrs of the overmolding mold provided by this utility model; Figure 6 A schematic diagram of the first mounting plate structure for the improved support structure of the overmolding die provided by this utility model; Figure 7 A schematic diagram of the base plate structure for the improved support structure of the overmolding die provided by this utility model.

[0013] The image shows: 1. Drive assembly; 2. Mounting base; 3. Support part; 4. Anti-slip strip; 5. Adjusting frame; 6. First bolt; 7. First hydraulic cylinder; 8. First hinge seat; 9. Groove; 10. Mold base; 11. Lower mold; 12. Upper mold; 13. Precast part; 14. Rubber coating layer; 15. Insertion hole; 16. Molding cavity; 101. Second hydraulic cylinder; 102. Bracket; 103. Slider seat; 104. Mounting groove; 201. Seat body; 202. Fixing plate; 301. Base plate; 302. Pad plate; 303. Second bolt; 501. First mounting plate; 502. Second mounting plate; 503. Through hole; 504. First connecting rod; 505. Second connecting rod; 506. Pull rod; 507. Second hinge seat; 508. Third hinge seat. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0015] like Figures 1-7As shown, this embodiment proposes a support structure to improve the burr of an overmolding mold, including a mold base 10. A mold is provided on the top of the mold base 10. The mold includes a lower mold 11 fixedly installed on the top of the mold base 10 and an upper mold 12 that cooperates with the lower mold 11. A molding cavity 16 for placing a preform 13 and for forming an overmolding layer 14 is provided between the lower mold 11 and the upper mold 12. A plurality of drive assemblies 1 are also installed on the mold base 10, the number of drive assemblies 1 being the same as the number of openings in the preform 13. The structure also includes an adjustment assembly fixedly installed on the moving end of the drive assembly 1, the adjustment assembly including components connected to the moving end of the drive assembly 1. The mounting base 2 houses a first hydraulic cylinder 7, and an adjusting frame 5 is mounted on the moving end of the first hydraulic cylinder 7. The adjusting frame 5 includes a symmetrically arranged first mounting plate 501 and a second mounting plate 502. The first mounting plate 501 is fixedly connected to the end face of the mounting base 2 away from the drive assembly 1. A pull rod 506 is fixedly connected to the end of the second mounting plate 502 facing the first mounting plate 501. One end of the pull rod 506 away from the second mounting plate 502 is connected to the moving end of the first hydraulic cylinder 7. Multiple annularly distributed first connecting rods 504 are hinged to the outer wall of the first mounting plate 501, and the outer wall of the second mounting plate 502 is hinged to... Multiple annularly distributed second connecting rods 505 are provided, and a first hinge seat 8 is provided between the first connecting rods 504 and the second connecting rods 505, which are rotatably connected to both. Multiple support parts 3 are annularly distributed on the outside of the adjusting frame 5 and are fixedly connected to the outer wall of the first hinge seat 8. The lower mold 11 and the upper mold 12 are both provided with insertion holes 15 that cooperate with the support parts 3. The insertion holes 15 are connected to the inside of the molding cavity 16. In use, the driving assembly 1 can drive the multiple support parts 3 on the adjusting frame 5 to extend into the inside of the preform 13 through the insertion holes 15 and the openings on the preform 13, and to purify its inner wall. The support prevents the hollow tubular preform 13 from deforming due to the pressure during the injection of the rubber coating material, thereby reducing the problem of burrs caused by the deformation of the preform 13. At the same time, the first hydraulic cylinder 7 can drive the second mounting plate 502 to move. By using the linkage of the first connecting rod 504, the second connecting rod 505 and the first hinge seat 8, multiple annularly distributed support parts 3 can be driven to open or close synchronously, thereby changing the diameter of the annular support structure formed by multiple support parts 3. This makes it easy to adapt to tubular preforms 13 with different inner diameters. There is no need to customize special inserts for preforms 13 with different inner diameters, which greatly reduces production costs and improves the overall versatility.Multiple anti-slip strips 4 are fixedly installed on the support part 3 through multiple grooves 9 evenly opened on the outer wall of the support part 3. The anti-slip strips 4 protrude from the surface of the support part 3. The multiple annularly distributed support parts 3 can form uniform support from multiple directions on the inner wall of the cavity of the precast part 13. With the anti-slip strips 4 protruding from the surface of the support part 3, the friction between the support structure and the inner wall of the precast part 13 can be increased, preventing relative sliding between the support structure and the precast part 13. At the same time, the precast part 13 is fixed by friction, without relying on special structures such as pre-reserved positioning rods inside the precast part 13. This solves the problem in the existing solution that the precast part 13 cannot effectively prevent deflection due to the lack of positioning rods, and improves the overall applicability.

[0016] like Figure 3 and Figure 4 As shown, in a preferred embodiment, based on the above method, the drive assembly 1 further includes a second hydraulic cylinder 101 fixedly mounted on the mold base 10 via a bracket 102. The moving end of the second hydraulic cylinder 101 is fixedly connected to a slider seat 103 slidably connected to the mold base 10. The slider seat 103 has a mounting groove 104 on its side wall facing the mounting base 2. It should be noted that during use, the second hydraulic cylinder 101 can drive the slider seat 103 to move, thereby causing multiple support parts 3 to extend into the cavity of the preform 13 or to move the support parts 3 out of the cavity of the preform 13.

[0017] like Figures 4-6 As shown, in a preferred embodiment, based on the above method, the mounting base 2 further includes a hollow base body 201 for mounting the first hydraulic cylinder 7. A fixing plate 202 is fixedly connected to the end of the base body 201. The fixing plate 202 is detachably mounted on the slider seat 103 via the first bolt 6 and the mounting groove 104. It should be noted that, in use, the fixing plate 202 facilitates the fixing of the mounting base 2 to the slider seat 103 by cooperating with the first bolt 6 and the mounting groove 104. The base body 201 facilitates the installation of the first hydraulic cylinder 7.

[0018] like Figure 3 , Figure 4 and Figure 7As shown, in a preferred embodiment, based on the above method, the support part 3 further includes a base plate 301 fixedly connected to the top of the first hinge seat 8. A pad 302 is provided on the top of the base plate 301. Both the pad 302 and the anti-slip strip 4 are made of elastic material. Second bolts 303 that are threadedly connected to the pad 302 are provided at the four corners of the base plate 301. It should be noted that, in use, the pad 302 and the anti-slip strip 4 are made of elastic material, which can form flexible contact with the inner wall of the cavity of the precast part 13. When the support part 3 is pressed against the precast part 13, the elastic material can adapt to the slight unevenness that may exist on the inner wall of the precast part 13 through slight deformation, ensuring a tighter fit and avoiding scratches or indentations on the inner wall of the precast part 13 caused by rigid contact. The setting of the second bolts 303 can facilitate the disassembly and assembly of the pad 302, thereby facilitating its replacement.

[0019] like Figure 5 and Figure 6 As shown, in a preferred embodiment, based on the above method, both the first mounting plate 501 and the mounting base 2 are provided with through holes 503 that cooperate with the pull rod 506. The outer wall of the first mounting plate 501 is fixedly connected to a plurality of second hinge seats 507 that cooperate with the first connecting rod 504, and the outer wall of the second mounting plate 502 is fixedly connected to a plurality of third hinge seats 508 that cooperate with the second connecting rod 505. It should be noted that the second hinge seats 507 facilitate the installation of the first connecting rod 504, the third hinge seats 508 facilitate the installation of the second connecting rod 505, and the through holes 503 prevent interference with the movement of the pull rod 506.

[0020] Specifically, the working principle of the improved support structure for the overmolding die is as follows: When overmolding the preform 13, the preform 13 is first placed into the molding cavity 16, and then the upper mold 12 and the lower mold 11 are closed. After the mold is closed, the second hydraulic cylinder 101 is activated, which drives the slider seat 103 to move, so that multiple support parts 3 extend into the interior of the preform 13 through the insertion hole 15 and the opening on the preform 13. Then, the first hydraulic cylinder 7 is activated, which pulls the pull rod 506 to move the second mounting plate 502 toward the first mounting plate 501, so that multiple support parts 3 open synchronously from the preform 13. The cavity wall forms uniform support in multiple directions, avoiding deformation of the hollow tubular preform 13 caused by the pressure of the overmolding material injection. This prevents the formation of burrs due to the deformation of the preform 13. In addition, the anti-slip strip 4 on the surface of the protruding support part 3 fixes the preform 13 through friction, preventing the preform 13 from deflecting or the cavity outlet from deflecting. After the preform 13 is injection molded and overmolded, the first hydraulic cylinder 7 is activated to push the second mounting plate 502 away from the first mounting plate 501 through the pull rod 506, causing the multiple support parts 3 to retract synchronously, thus facilitating its removal from the preform 13.

[0021] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present utility model.

Claims

1. A support structure for improving the burr of an overmolding mold, comprising a mold base (10), wherein a mold is disposed on the top of the mold base (10), the mold comprising a lower mold (11) fixedly mounted on the top of the mold base (10) and an upper mold (12) cooperating with the lower mold (11), a forming cavity (16) for placing a preform (13) and for forming an overmolding layer (14) is provided between the lower mold (11) and the upper mold (12), and a plurality of drive assemblies (1) mounted on the mold base (10), wherein the number of drive assemblies (1) is the same as the number of openings in the preform (13), characterized in that, Also includes: An adjustment component is fixedly installed on the moving end of the drive component (1). The adjustment component includes a mounting base (2) connected to the moving end of the drive component (1). A first hydraulic cylinder (7) is installed inside the mounting base (2). An adjustment frame (5) is installed on the moving end of the first hydraulic cylinder (7). The adjusting frame (5) includes a first mounting plate (501) and a second mounting plate (502) arranged symmetrically. The first mounting plate (501) is fixedly connected to the end face of the mounting base (2) away from the drive assembly (1). A pull rod (506) is fixedly connected to the end of the second mounting plate (502) facing the first mounting plate (501). One end of the pull rod (506) away from the second mounting plate (502) is connected to the moving end of the first hydraulic cylinder (7). A plurality of annularly distributed first connecting rods (504) are hinged to the outer wall of the first mounting plate (501). A plurality of annularly distributed second connecting rods (505) are hinged to the outer wall of the second mounting plate (502). A first hinge seat (8) is provided between the first connecting rods (504) and the second connecting rods (505) on the same straight line and is rotatably connected to both. Multiple support parts (3) are arranged in a ring on the outside of the adjustment frame (5) and fixedly connected to the outer wall of the first hinge seat (8). The lower mold (11) and the upper mold (12) are provided with insertion holes (15) that cooperate with the support parts (3). The insertion holes (15) are connected to the interior of the forming cavity (16). Multiple anti-slip strips (4) are fixedly installed on the support part (3) through multiple grooves (9) evenly opened on the outer wall of the support part (3), and the anti-slip strips (4) protrude from the surface of the support part (3).

2. The support structure for improving the burrs in overmolding according to claim 1, characterized in that, The drive assembly (1) includes a second hydraulic cylinder (101) fixedly mounted on the mold base (10) via a bracket (102). The moving end of the second hydraulic cylinder (101) is fixedly connected to a slider seat (103) which is slidably connected to the mold base (10). The slider seat (103) has an installation groove (104) on its side wall facing the mounting base (2).

3. The support structure for improving the burrs in overmolding according to claim 2, characterized in that, The mounting base (2) includes a hollow seat (201) for mounting the first hydraulic cylinder (7), and a fixing plate (202) is fixedly connected to the end of the seat (201). The fixing plate (202) is detachably mounted on the slider seat (103) by means of a first bolt (6) and a mounting groove (104).

4. The support structure for improving the burrs in overmolding according to claim 1, characterized in that, The support (3) includes a base plate (301) fixedly connected to the top of the first hinge seat (8), and a pad (302) is provided on the top of the base plate (301).

5. The support structure for improving the burrs in overmolding according to claim 4, characterized in that, Both the pad (302) and the anti-slip strip (4) are made of elastic material, and the four corners of the base plate (301) are provided with second bolts (303) that are threadedly connected to the pad (302).

6. The support structure for improving the burrs in overmolding according to claim 1, characterized in that, Both the first mounting plate (501) and the mounting base (2) are provided with through holes (503) that cooperate with the pull rod (506). The outer wall of the first mounting plate (501) is fixedly connected with a plurality of second hinge seats (507) that cooperate with the first connecting rod (504). The outer wall of the second mounting plate (502) is fixedly connected with a plurality of third hinge seats (508) that cooperate with the second connecting rod (505).

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