Mold stripping structure

Abstract

The utility model provides a die stripping structure. A first cavity is formed in a die in a concave mode, a first through groove is formed in the first cavity in a penetrating mode, a first die core and a second die core are coaxially arranged in the first through groove, an annular groove is formed in the end of the first die core, and a boss part is arranged at the end of the second die core. A second cavity is formed between the annular groove and the boss part; the periphery of the inner side wall of the annular groove is concaved inwards to form a groove part. A first mold core and a second mold core are coaxially arranged in a first through groove of a first cavity in a mold, the first mold core is further moved relative to the second mold core, and then a groove part, used for forming an inverted buckle part, of the second cavity is staggered and separated from a notch part at the bottom end of a product connecting part, so that the connecting part has a space capable of deforming inwards; and finally, the product can be easily and forcibly separated, so that the product is prevented from being damaged, the reject ratio and the production cost are reduced, and the market demand is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould technical field, specifically, relate to a mould structure. BACKGROUND

[0002] The conventional rubber product of four around inverted buckling needs four core-pulling, and the mould structure is complex and the forming time is long, if directly strong, it is easy to cause the product to be damaged, thereby make the bad rate high, product processing cost is higher.

[0003] Therefore, the applicant specifically proposes the present application after studying the prior art. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a mould structure, aims at improving at least one of above -mentioned technical problems.

[0005] In order to solve above technical problem, the utility model provides a mould structure, the first cavity is formed to the concave on mould, the first through groove is arranged in the first cavity, the first mould core and the second mould core are arranged coaxially in the first through groove, the end of the first mould core is provided with annular groove, the end of the second mould core is provided with boss part, the second cavity is formed between the annular groove and the boss part, the inner wall circumferential concave of the annular groove is formed with the recess part, wherein, the annular groove can be axially moved to the first through groove outside relative to the second mould core, so that the recess part and the boss part are staggered and separated.

[0006] As further optimization, the second through groove is arranged through the middle of the first mould core, and the second mould core is connected with the second through groove in a sliding fit.

[0007] As further optimization, the limit groove is radially arranged at the bottom end of the first through groove, the limit part is formed by extending radially outward at the bottom end of the first mould core, and the limit part is located in the limit groove.

[0008] As further optimization, the third through groove is arranged through the top end of the limit groove, the reset thimble is slidably arranged in the third through groove, and the bottom end of the reset thimble abuts against the upper end of the limit part.

[0009] As further optimization, the fourth through groove is arranged through the first cavity, and the ejector pin is slidably connected with the fourth through groove.

[0010] As further optimization, the fourth through groove is provided with four, and is located at the four corner positions of the first cavity.

[0011] Through the above technical scheme, the utility model can achieve the following technical effects:

[0012] This application provides a mold ejection structure in which a first mold core and a second mold core are coaxially arranged in a first through groove of a first cavity on the mold, and the first mold core is moved relative to the second mold core. This causes the groove portion of the second cavity used to form the undercut portion and the bottom groove portion of the product connection portion to be staggered and separated, so that the connection portion has space to deform inward. Finally, the product can be easily and forcefully ejected, avoiding product damage, reducing defect rate and production cost, and meeting market demand. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of a mold ejection structure according to the present invention;

[0015] Figure 2 This is a utility model Figure 1 An enlarged schematic diagram of point A in the middle;

[0016] Figure 3 This is a cross-sectional schematic diagram of a mold ejection structure according to the present invention;

[0017] Figure 4 This is a utility model Figure 3 An enlarged diagram of point B in the middle;

[0018] Figure 5 This is a cross-sectional structural diagram of a product according to one embodiment of the present invention;

[0019] The markings in the diagram are: 1. Lower mold; 2. First cavity; 3. First through groove; 4. First mold core; 5. Second mold core; 6. Second through groove; 7. Annular groove; 8. Boss; 9. Second cavity; 10. Cover; 11. Connecting part; 12. Groove; 13. Undercut; 14. Slot; 15. Limiting groove; 16. Limiting part; 17. Third through groove; 18. Return ejector pin; 19. Fourth through groove; 20. Demolding ejector pin. Detailed Implementation

[0020] 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 a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Depend on Figures 1 to 5 As shown, this utility model embodiment provides a mold ejection structure for injection molding rubber products. In this embodiment, the mold includes a lower mold 1 and an upper mold (not shown in the figure). A first cavity 2 is formed in the concave upper part of the lower mold 1. During injection molding, the upper mold and the lower mold 1 abut against each other to seal the first cavity 2. Details are omitted here. Preferably, a first through groove 3 is provided through the first cavity 2. A first mold core 4 and a second mold core 5 are coaxially arranged in the first through groove 3. A second through groove 6 is provided through the middle of the first mold core 4. The second mold core 5 is adapted to slide and connect with the second through groove 6. In this embodiment, the first mold core 4 has an annular groove 7 at its end, and the second mold core 5 has a boss 8 at its end. Multiple bosses 8 are provided in this embodiment. A second cavity 9 is formed between the annular groove 7 and the bosses 8, and the second cavity 9 communicates with the first cavity 2. After injection molding, the first cavity 2 forms the cover portion 10 of the product, and the second cavity 9 forms the connecting portion 11 of the product. The inner sidewall of the annular groove 7 has a recessed groove 12 to form the undercut portion 13 of the connecting portion 11. The annular groove 7 can be axially moved relative to the second mold core 5 to the outside of the first through groove 3, so that the recessed groove 12 and the bosses 8 are staggered and separated. In this embodiment, the second mold core 5 remains stationary and is pushed upwards from the bottom of the first mold core 4 into the first through groove 3 by a pusher pin, or it can be driven by a cylinder. Various methods exist, which will not be elaborated here. Since the boss part 8 forms a groove part 14 at the bottom of the molded product, by first moving the first mold core 4 upward, the product is separated from the boss part 8. At this time, the connecting part 11 has space to deform towards the groove part 14, so that the undercut part 13 can be dislodged from the groove part 12. At this time, the product can be easily and forcefully removed by simply pulling it outward.

[0022] Preferably, a limiting groove 15 is radially provided at the bottom end of the first through groove 3, and a limiting part 16 is formed by radially extending outward from the bottom end of the first mold core 4. The limiting part 16 is located within the limiting groove 15. When the first mold core 4 moves upward, the limiting part 16 abuts against the top end of the limiting groove 15, which can prevent the first mold core 4 from moving too upward.

[0023] Preferably, a third through groove 17 is provided through the top of the limiting groove 15; a return ejector pin 18 is slidably disposed in the third through groove 17, and the bottom end of the return ejector pin 18 abuts against the upper end of the limiting part 16. During demolding, the limiting part 16 and the top end of the return ejector pin 18 extend from the upper end of the lower mold 1. After demolding is completed, the upper mold descends again to contact the lower mold 1, which can push it back into the third through groove 17, thereby pushing the limiting part 16 downward through the return ejector pin 18, so that the first mold core 4 returns downward into the first through groove 3.

[0024] Preferably, a plurality of fourth through slots 19 are provided through the first cavity 2; it also includes a plurality of ejector pins 20, which are slidably connected to the fourth through slots 19. Ejector pins 20 assist in demolding the cover portion 10 of the product. Furthermore, four fourth through slots 19 are provided, located at the four corners of the first cavity 2, to enhance the demolding effect.

[0025] As a preferred embodiment, the mold is provided with multiple cavities, eight in this embodiment, so that multiple products can be injection molded at one time, which increases product output, improves production efficiency, and reduces production costs.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mold ejection structure, wherein a first cavity is formed recessed in the mold, characterized in that, A first through groove is provided through the first cavity, and a first mold core and a second mold core are coaxially arranged in the first through groove. An annular groove is provided at the end of the first mold core, and a boss is provided at the end of the second mold core. A second cavity is formed between the annular groove and the boss. A groove is formed by recessing the inner sidewall of the annular groove. The annular groove can be axially moved relative to the second mold core to the outside of the first through groove, so that the groove and the boss are staggered and separated.

2. The mold ejection structure according to claim 1, characterized in that... The first mold core has a second through groove through its middle section, and the second mold core is adapted to slide and connect with the second through groove.

3. The mold ejection structure according to claim 1, characterized in that... The bottom end of the first through groove is radially provided with a limiting groove, and the bottom end of the first mold core extends radially outward to form a limiting part, which is located in the limiting groove.

4. The mold ejection structure according to claim 3, characterized in that... A third through groove is provided through the top of the limiting groove; a return pin is slidably provided in the third through groove, and the bottom end of the return pin abuts against the upper end of the limiting part.

5. The mold ejection structure according to claim 1, characterized in that... The first cavity is provided with a plurality of fourth through slots; it also includes a plurality of ejector pins, which are slidably connected to the fourth through slots.

6. The mold ejection structure according to claim 5, characterized in that... The fourth through groove is provided in four parts, which are located at the four corners of the first cavity.

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