Sliding block internal shrinkage demolding device for injection molded part with barb

Abstract

The utility model relates to the technical field of production of injection molding parts with barbs, and discloses a sliding block internal shrinkage demolding device for injection molding parts with barbs, which comprises an outer mold and an inner mold, a slot communicated with an injection molding cutting groove is arranged in the side wall of the outer mold, a demolding push block slides in the injection molding cutting groove, and the demolding push block and the injection molding cutting groove form a complete barb casting groove body; a demolding assembly is installed in the inserting groove, a downward pressing assembly matched with the demolding assembly is installed on the upper side of the outer mold, and the downward pressing assembly pushes the demolding assembly to move downwards and drives the demolding push block to slide in the injection molding cutting groove to push the barb out of the injection molding cutting groove. Compared with the prior art, the quick demolding device has the advantages that after the injection molding part is cooled, the inner mold is taken out, the demolding assembly is pushed to move downwards through the pressing assembly, the demolding push block is driven to slide in the injection molding cutting groove, the barb is pushed out of the injection molding cutting groove, the injection molding part with the barb is pulled out of the outer mold, and quick demolding of the injection molding part with the barb is achieved.

Description

Technical Field

[0001] This utility model relates to the field of production technology of injection molded parts with barbs, specifically to a slider retraction demolding device for injection molded parts with barbs. Background Technology

[0002] Car interiors often use hook-and-loop fasteners to install dust covers or close storage box lids, etc. These hook-and-loop fasteners are shown in the attached image. Figure 5 As shown, sleeve-type molds are used for injection molded parts with cylindrical bodies. Injection molded parts with barbed structures are not easy to demold in sleeve-type molds. Usually, a symmetrical two-piece mold structure is used for production to facilitate demolding of the barbed parts. The symmetrical two-piece mold structure requires multiple sets of bolts for connection, which is more cumbersome. After injection molding, burrs are easy to appear on the outside of the barbed joint at the gap between the two mold pieces, which affects the use of the barbed joint. The burrs need to be ground off, which affects production efficiency.

[0003] To address the aforementioned technical problems, this application proposes a slider retraction demolding device for injection molded parts with barbs. Utility Model Content

[0004] I. Technical problems to be solved

[0005] The technical problem this invention aims to solve is that injection molded parts with barbed structures are not easy to demold in sleeve-type molds. When connecting two-piece molds, multiple sets of bolts are required, which is cumbersome. After injection molding, burrs are prone to appear on the sides, affecting the use of the barbed joint.

[0006] II. Technical Solution

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a slider inward demolding device for injection molded parts with barbs, including an outer mold and an inner mold, wherein the injection molded parts with barbs are cast between the outer mold and the inner mold, and the lower part of the injection molded parts with barbs has multiple sets of grooves and barbs on the outer side;

[0008] The bottom inner side of the outer mold is provided with multiple sets of baffles forming grooves and injection grooves forming barbs. The injection grooves are located between the baffles. The inner side wall of the outer mold is provided with a slot that communicates with the injection grooves. A demolding push block slides inside the injection grooves. The demolding push block and the injection grooves form a complete barb casting groove.

[0009] A demolding assembly is installed inside the slot, and a pressing assembly that cooperates with the demolding assembly is installed on the upper side of the outer mold. The pressing assembly pushes the demolding assembly downward, causing the demolding push block to slide inside the injection groove, and pushing the barb out of the injection groove.

[0010] As an improvement, the demolding assembly includes a push plate, springs, and a slider. The push plate is located inside the slot and connected to multiple sets of demolding push blocks that extend into the slot. The multiple sets of springs mount the push plate on the inner wall of the slot, and the slider slides into the slot from the top.

[0011] As an improvement, the side of the slider near the push plate has an inclined structure, and the lower part contacts the outer side of the push plate, while the outer wall of the slider contacts the side wall of the slot.

[0012] As an improvement, the pressing assembly includes a pressing plate, a threaded shaft, and a connecting block. The pressing plate is installed between the tops of two sets of sliders on the same side, the connecting block is installed on the outside of the outer mold, and the threaded shaft slides through the pressing plate and its lower end is threaded into the connecting block.

[0013] As an improvement, a threaded connecting block is installed on the top of the inner mold, and a threaded groove for installing the threaded connecting block is provided on the inner wall of the top of the outer mold. An anti-slip screw block is installed on the top of the threaded connecting block.

[0014] As an improvement, multiple sets of injection tubes pass through between the anti-slip screw block and the threaded connection block, with the lower end of the injection tube located between the outer mold and the inner mold.

[0015] III. Beneficial Effects

[0016] The advantages of this utility model compared with the prior art are as follows: This application adopts an injection mold with an outer mold and an inner mold sleeve structure to prevent burrs from appearing on the outer wall of the injection molded part, which would affect its use. The barb on the outside of the injection molded part is formed by the injection groove on the inner wall of the outer mold and the demolding push block. After the injection molded part cools down, the inner mold is taken out, and the demolding component is pushed down by the pressing component, which drives the demolding push block to slide inside the injection groove, pushes the barb out of the injection groove, and pulls the injection molded part with barb out of the outer mold, thus realizing the rapid demolding of the injection molded part with barb. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a slider retraction demolding device for injection molded parts with barbs according to this utility model.

[0018] Figure 2 This is a schematic diagram of the middle section of the outer mold of a slider retraction demolding device for injection molded parts with barbs according to this utility model.

[0019] Figure 3 This is a schematic diagram of the outer mold slot of a slider retraction demolding device for injection molded parts with barbs according to this utility model.

[0020] Figure 4 This is a schematic diagram of the inner mold structure of a slider retraction demolding device for injection molded parts with barbs according to this utility model.

[0021] Figure 5This is a schematic diagram of the structure of a slider retraction demolding device for injection molded parts with barbs, according to the present invention.

[0022] As shown in the figure: 1. Outer mold; 2. Inner mold; 3. Injection molded part with barbs; 4. Barbs; 5. Groove; 6. Stop bar; 7. Injection groove; 8. Slot; 9. Demolding push block; 10. Push plate; 11. Spring; 12. Lower pressure plate; 13. Threaded shaft; 14. Connecting block; 15. Slider; 16. Threaded connecting block; 17. Anti-slip screw block; 18. Injection tube; 19. Threaded groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] As attached Figure 1 Appendix Figure 2 Appendix Figure 4 and attached Figure 5 As shown, a slider retraction demolding device with a barbed injection molded part includes an outer mold 1 and an inner mold 2. The barbed injection molded part 3 is cast between the outer mold 1 and the inner mold 2. The lower part of the barbed injection molded part 3 has multiple sets of grooves 5 and barbs 4 on the outer side. The material of the barbed injection molded part 3 is tough and can undergo slight deformation. A threaded connecting block 16 is installed on the top of the inner mold 2. The inner wall of the top of the outer mold 1 is provided with a threaded groove 19 that matches the threaded connecting block 16. An anti-slip screw block 17 is installed on the top of the threaded connecting block 16. By rotating the anti-slip screw block 17, the threaded connecting block 16 is installed into the threaded groove 19, and the inner mold 2 is fixedly installed inside the outer mold 1. Multiple sets of injection tubes 18 pass between the anti-slip screw block 17 and the threaded connecting block 16. The lower end of the injection tube 18 is located between the outer mold 1 and the inner mold 2. Material is uniformly injected between the outer mold 1 and the inner mold 2 through the multiple sets of injection tubes 18.

[0025] As attached Figure 2 and attached Figure 3 As shown, the bottom inner side of the outer mold 1 is provided with multiple sets of baffles 6 forming grooves 5 and injection grooves 7 forming barbs 4. The injection grooves 7 are located between the baffles 6, and the baffles 6 are in sealed contact with the inner mold 2. The inner side wall of the outer mold 1 is provided with slots 8 that communicate with the injection grooves 7. A demolding pusher 9 slides inside the injection grooves 7. The demolding pusher 9 and the injection grooves 7 form a complete casting groove for barbs 4. After the material enters between the outer mold 1 and the inner mold 2, the baffles 6 separate the material from the injection grooves 7, and the material enters between the demolding pusher 9 and the injection grooves 7 to form barbs 4.

[0026] As attached Figure 2 and attached Figure 3 As shown, a demolding assembly is installed inside the slot 8. The demolding assembly includes a push plate 10, a spring 11, and a slider 15. The push plate 10 is located inside the slot 8 and is connected to multiple sets of demolding push blocks 9 that pass through the slot 8. The multiple sets of springs 11 mount the push plate 10 on the inner wall of the slot 8. The slider 15 slides into the slot 8 from the top. The side of the slider 15 near the push plate 10 has a sloping structure, and its lower part contacts the outer side of the push plate 10. When the sloping slider 15 moves downward, it pushes the push plate 10 into the injection groove 7. The outer wall of the slider 15 contacts the side wall of the slot 8. The side wall of the slot 8 supports the outer wall of the slider 15 to ensure stable movement of the slider 15.

[0027] As attached Figure 2 and attached Figure 3 As shown, a pressing assembly that engages with the demolding assembly is installed on the upper side of the outer mold 1. The pressing assembly includes a pressing plate 12, a threaded shaft 13, and a connecting block 14. The pressing plate 12 is installed between the tops of two sets of sliders 15 on the same side. The connecting block 14 is installed on the outer side of the outer mold 1. The threaded shaft 13 slides through the pressing plate 12 and its lower end is threaded into the connecting block 14. The threaded shaft 13 moves into the connecting block 14, causing the pressing plate 12 to move downward, and at the same time, causing the two sets of sliders 15 to move downward.

[0028] The specific usage method is as follows:

[0029] After the injection molded part cools, the threaded connecting block 16 is rotated out of the threaded groove 19, the inner mold 2 is removed from the outer mold 1, the threaded shaft 13 in the pressing assembly is rotated, the threaded shaft 13 moves downward inside the connecting block 14, and the top of the threaded shaft 13 drives the lower pressure plate 12 to move downward. The lower pressure plate 12 and the slider 15 are fixedly connected. The lower pressure plate 12 drives the slider 15 to retract into the slot 8, and the slider 15 squeezes the push plate 10, causing the push plate 10 to move towards the injection groove 7. The demolding push block 9 moves inside the injection groove 7. The material of the barbed injection molded part 3 has the ability to deform and has a groove 5 at the bottom. The barb 4 on the lower outer side of the barbed injection molded part 3 is pushed out of the injection groove 7, and the barbed injection molded part 3 is pulled from the top of the outer mold 1 to achieve rapid demolding of the barbed injection molded part 3.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A slider retraction demolding device for a barbed injection molded part, comprising an outer mold (1) and an inner mold (2), wherein a barbed injection molded part (3) is cast between the outer mold (1) and the inner mold (2), the barbed injection molded part (3) having multiple sets of grooves (5) at its lower part and barbs (4) on its outer side, characterized in that: The bottom inner side of the outer mold (1) is provided with multiple sets of baffles (6) forming grooves (5) and injection grooves (7) forming barbs (4). The injection grooves (7) are located between the baffles (6). The inner side wall of the outer mold (1) is provided with slots (8) that communicate with the injection grooves (7). A demolding push block (9) slides inside the injection grooves (7). The demolding push block (9) and the injection grooves (7) form a complete barb (4) casting groove. The slot (8) is equipped with a demolding component, and the upper side of the outer mold (1) is equipped with a pressing component that cooperates with the demolding component. The pressing component pushes the demolding component to move downward, causing the demolding push block (9) to slide inside the injection groove (7) and push the barb (4) out of the injection groove (7).

2. The slider retraction demolding device for injection molded parts with barbs according to claim 1, characterized in that: The demolding assembly includes a push plate (10), a spring (11) and a slider (15). The push plate (10) is located inside the slot (8) and is connected to multiple sets of demolding push blocks (9) that pass through the slot (8). The multiple sets of springs (11) mount the push plate (10) on the inner wall of the slot (8). The slider (15) slides into the slot (8) from the top.

3. The slider retraction demolding device for injection molded parts with barbs according to claim 2, characterized in that: The slider (15) has a sloping structure on the side near the push plate (10), and its lower part is in contact with the outer side of the push plate (10). The outer wall of the slider (15) is in contact with the side wall of the slot (8).

4. The slider retraction demolding device for injection molded parts with barbs according to claim 3, characterized in that: The pressing assembly includes a pressing plate (12), a threaded shaft (13), and a connecting block (14). The pressing plate (12) is installed between the tops of two sets of sliders (15) on the same side. The connecting block (14) is installed on the outside of the outer mold (1). The threaded shaft (13) slides through the pressing plate (12) and its lower end is threaded into the connecting block (14).

5. The slider retraction demolding device for injection molded parts with barbs according to claim 1, characterized in that: The inner mold (2) is equipped with a threaded connecting block (16) on its top, and the outer mold (1) has a threaded groove (19) on its top inner wall that is fitted with the threaded connecting block (16). The threaded connecting block (16) is equipped with an anti-slip screw block (17) on its top.

6. The slider retraction demolding device for injection molded parts with barbs according to claim 5, characterized in that: Multiple sets of injection tubes (18) pass through between the anti-slip screw block (17) and the threaded connection block (16), with the lower end of the injection tube (18) located between the outer mold (1) and the inner mold (2).

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