Glue overflow-free structure

Abstract

The utility model discloses a kind of overflow glue-free structures, comprising: oppositely arranged upper die forming mold core and lower die forming mold core;Upper die forming mold core includes upper die mold core body, several inserts embedded on upper die mold core body, upper die mold core body has the upper die forming groove formed from surface to inside recess;Lower die forming mold core includes lower die mold core body, several high-molecular sealing members embedded with interference in lower die mold core body, lower die mold core body has the lower die forming groove formed from surface to inside recess;Several high-molecular sealing members end is respectively placed in the end surface of lower die forming groove, the end surface of high-molecular sealing member is slightly higher than the end surface of lower die mold core body, its height is the deformation variable of high-molecular sealing member;By upper and lower die forming mold core cooperation and high-molecular sealing member design, high-molecular sealing member is embedded with interference and slightly higher than lower die end surface, deformation fills gap when mould closes, effectively prevent overflow glue, improve product precision and appearance quality, while avoid damage caused to sealing member when mould closes.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and more particularly to a structure that prevents glue overflow. Background Technology

[0002] In injection molding, excess adhesive is a common and troublesome problem. If adhesive overflows from the mold openings, it not only wastes raw materials but also contaminates production equipment and the working environment, increasing cleaning costs and maintenance workload. Furthermore, excess adhesive affects the product's appearance quality and dimensional accuracy, leading to a higher defect rate and, in severe cases, even impacting the product's performance and reducing its market competitiveness.

[0003] According to Chinese patent CN217144653U, a rubber coating mold is disclosed. This mold is provided with an upper limit groove and a lower limit groove. An upper rubber coating cavity is provided in the upper limit groove and a lower rubber coating cavity is provided in the lower limit groove. The upper and lower rubber coating cavities are combined to form a complete rubber coating cavity. The rubber coating cavity realizes the rubber coating of the area to be coated. An upper sealing sheet and a lower sealing sheet are used to seal the two ends of the area to be coated. Since the upper and lower sealing sheets are made of flexible materials, they undergo a small amount of deformation during the rubber coating process, thereby sealing the gap that appears in the rubber coating cavity after the mold is closed. This achieves sealing of the rubber coating area and effectively avoids the defect of rubber overflow.

[0004] However, during use, both the upper and lower sealing films protrude from the surface of the mold. After a long period of high-frequency mold opening and closing, the upper and lower sealing films, being made of flexible materials, are easily damaged by friction and collision with the mold.

[0005] Therefore, it is necessary to develop a glue-free structure to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a stable and reliable adhesive-free structure.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a glue-free structure, comprising:

[0008] The upper mold forming core and the lower mold forming core are set relative to each other;

[0009] The upper mold forming core includes an upper mold core body and a plurality of inserts embedded in the upper mold core body. The upper mold core body has an upper mold forming groove formed by recessing inward from the side opposite to the lower mold forming core.

[0010] The lower mold forming core includes a lower mold core body and a plurality of polymer sealing members that are interference-fitted into the lower mold core body. The lower mold core body has a lower mold forming groove formed by recessing inward from the side opposite to the upper mold forming core.

[0011] The ends of several of the polymer seals are respectively placed on the end face of the lower mold forming groove. The end face of the polymer seal is slightly higher than the end face of the lower mold core body, and its height is the deformation of the polymer seal.

[0012] Furthermore, the height of the end face of the polymer seal above the end face of the lower mold core body is mm.

[0013] Furthermore, the lower mold core body has a groove formed by recessing from the surface inward, and one end of the polymer seal extends outward to form a retaining protrusion. The retaining protrusion abuts against the groove to fix the position of the polymer seal.

[0014] Furthermore, the polymer sealant is recessed inward on the side corresponding to the lower mold forming groove to form a shaping groove.

[0015] Furthermore, the polymer seal is provided with a positioning block extending from its surface toward the upper mold forming core, and the upper mold core body is provided with a positioning hole corresponding to the position of the positioning block, so that the positioning block extends into the positioning hole when the mold is closed.

[0016] Furthermore, the lower mold forming core has at least one ejection channel, which penetrates the lower mold core body and communicates with the lower mold forming groove for ejecting the formed product.

[0017] Furthermore, the lower mold forming groove includes a first lower mold forming groove and a second lower mold forming groove, and the polymer sealing element is located at both ends of the first lower mold forming groove and the second lower mold forming groove, respectively.

[0018] Furthermore, the polymer sealing element includes a first shaped sealing element and a second shaped sealing element. The first shaped sealing element and the second shaped sealing element are disposed at both ends of the first lower mold forming groove, and their corresponding sides are recessed inward to form a shaped groove.

[0019] Furthermore, the polymer seal includes a third shaped seal and a fourth shaped seal, which are disposed at both ends of the second lower mold forming groove.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is a glue-free structure with stable and reliable characteristics. Through the matching of upper and lower mold cores and the design of polymer sealing components, the polymer sealing components are interference-fitted and slightly higher than the end face of the lower mold. When the mold is closed, the deformation fills the gap, effectively preventing glue overflow, improving product precision and appearance quality, and avoiding damage to the sealing components when the mold is closed. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0022] Figure 1 This is a three-dimensional structural diagram of a glue-free structure according to the present invention;

[0023] Figure 2 for Figure 1 A three-dimensional structural diagram of the upper mold core of the overflow-free structure shown from another angle;

[0024] Figure 3 for Figure 1 The diagram shows a three-dimensional structure of the lower mold core for a glue-free molding structure.

[0025] In the diagram: 1. Upper mold forming core; 11. Upper mold core body; 12. Insert; 121. First insert; 122. Second insert; 123. Third insert; 124. Insert slot; 125. Holding protrusion; 13. Upper mold forming groove; 131. First upper mold forming groove; 132. Second upper mold forming groove; 133. First through hole; 134. Second through hole; 14. Injection channel; 15. Slot; 2. Lower mold forming core; 21. Lower mold core body; 22. Polymer seal; 221. First shaping seal; 222. Second shaping seal; 223. Third shaping seal; 224. Fourth shaping seal; 225. Shaping groove; 226. Positioning block; 23. Lower mold forming groove; 231. First lower mold forming groove; 232. Second lower mold forming groove; 24. Ejection channel. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please refer to Figures 1 to 3 This utility model is a glue-free structure, which includes an upper mold forming core 1 and a lower mold forming core 2, which are arranged opposite to each other.

[0028] Please refer to Figures 1 to 2 The upper mold forming core 1 includes an upper mold core body 11 and an insert 12 penetrating the upper mold core body 11. The shape of the upper mold core body 11 can be changed according to requirements. The upper mold core body 11 has an upper mold forming groove 13 formed by recessing inward from the side opposite to the lower mold forming core 2. The upper mold forming groove 13 includes a first upper mold forming groove 131 and a second upper mold forming groove 132. The shapes of the first upper mold forming groove 131 and the second upper mold forming groove 132 can be changed according to requirements. In this embodiment, the first upper mold forming groove 131 is cylindrical, and a first through hole 133 is opened at the end away from the second upper mold forming groove 132. The diameter of the first through hole 133 is smaller than the diameter of the first upper mold forming groove 131. The second upper mold forming groove 132 is approximately rectangular, and a second through hole 134 is opened at the end away from the first upper mold forming groove 131.

[0029] Specifically, the upper mold forming core 1 has a pair of injection channels 14, which respectively penetrate the upper surface of the upper mold core body 11 and communicate with the first upper mold forming groove 131 and the second upper mold forming groove 132.

[0030] Please refer to Figure 2 The insert 12 includes a first insert 121, a second insert 122, and a third insert 123. The first insert 121 penetrates the upper surface of the upper mold core body 11, and its end extends to the outside of the first through hole 133. The side of the first insert 121 corresponding to the first through hole 133 is recessed inward to form an insert groove 124. The second insert 122 penetrates the upper surface of the upper mold core body 11, and its end extends to the other end of the first upper mold forming groove 131. The inner wall of the first upper mold forming groove 131, the first insert 121, and the second insert 122 surround each other to form a forming cavity. The third insert 123 penetrates the upper surface of the upper mold core body 11, and its end extends to the outside of the second through hole 134. The side of the third insert 123 corresponding to the second through hole 134 is recessed inward to form an insert groove 124. The inner wall of the second upper mold forming groove 132 and the third insert 123 surround each other to form a forming cavity.

[0031] Preferably, the upper mold core body 11 has a groove 15 formed by recessing from the surface inward, and one end of the first insert 121, the second insert 122 and the third insert 123 extends outward to form a retaining protrusion 125. The retaining protrusion 125 abuts against the groove 15 to fix the position of the first insert 121, the second insert 122 and the third insert 123.

[0032] Please refer to Figure 1 and Figure 3 The lower mold core 2 includes a lower mold core body 21 and a polymer sealing element 22 penetrating the lower mold core body 21. The shape of the lower mold core body 21 can be changed according to requirements. The lower mold core body 21 has a lower mold forming groove 23 formed by recessing inward from the side opposite to the upper mold core 1. The lower mold forming groove 23 includes a first lower mold forming groove 231 and a second lower mold forming groove 232. The first lower mold forming groove 231 corresponds to the first upper mold forming groove 131, and its shape matches the shape of the first upper mold forming groove 131, being cylindrical. The second lower mold forming groove 232 corresponds to the second upper mold forming groove 132, and its shape matches the shape of the second upper mold forming groove 132, being approximately rectangular.

[0033] Specifically, the lower mold forming core 2 has a pair of ejection channels 24, which respectively penetrate the upper surface of the lower mold core body 21 and communicate with the first lower mold forming groove 231 and the second lower mold forming groove 232. After forming, the ejector pin (not shown) moves along the ejection channel 24 to eject the formed part located in the first lower mold forming groove 231 and the second lower mold forming groove 232.

[0034] Please refer to Figure 3 The polymer sealing element 22 includes a first plastic sealing element 221 and a second plastic sealing element 222 disposed at both ends of the first lower mold forming groove 231, and a third plastic sealing element 223 and a fourth plastic sealing element 224 disposed at both ends of the second lower mold forming groove 232.

[0035] The first molding seal 221 and the second molding seal 222 both pass through the lower mold core body 21, and their ends extend to both ends of the first lower mold forming groove 231. The corresponding sides of the first molding seal 221 and the second molding seal 222 are recessed inward to form molding grooves 225. The first lower mold forming groove 231, the first molding seal 221, and the second molding seal 222 enclose each other to form a molding cavity. The third molding seal 223 and the fourth molding seal 224 both pass through the lower mold core body 21, and their ends extend to both ends of the second lower mold forming groove 232. The corresponding side of the fourth molding seal 224 is recessed inward to form molding grooves 225. The second lower mold forming groove 232, the third molding seal 223, and the fourth molding seal 224 enclose each other to form a molding cavity.

[0036] Specifically, the polymer seal 22 is made of flexible material and is interference-fitted onto the lower mold core body 21, with its surface protruding from the surface of the lower mold core body 21. Furthermore, the first molding seal 221, the second molding seal 222, the third molding seal 223, and the fourth molding seal 224 are all provided with positioning blocks 226 extending from their surfaces toward the upper mold core 1. When the mold is closed, the positioning blocks 226 extend into the upper mold core body 11.

[0037] Preferably, the lower mold core body 21 has a groove 15 formed by recessing from the surface inward. One end of the first plastic seal 221, the second plastic seal 222, the third plastic seal 223, and the fourth plastic seal 224 extends outward to form a retaining protrusion 125. The retaining protrusion 125 abuts against the groove 15 to fix the position of the first plastic seal 221, the second plastic seal 222, the third plastic seal 223, and the fourth plastic seal 224.

[0038] In use, the overflow-free structure of this utility model involves installing the upper mold core 1 and the lower mold core 2 into their respective positions on the injection molding machine. The first insert 121, the second insert 122, and the third insert 123 are fixed to the upper mold core body 11 by engaging with the slot 15 of the upper mold core body 11 via the retaining protrusion 125. The first plastic seal 221, the second plastic seal 222, the third plastic seal 223, and the fourth plastic seal 224 are fixed to the lower mold core body 21 by engaging with the slot 15 of the lower mold core body 21 via the retaining protrusion 125, ensuring that the polymer seal 22 is interference-fitted, with its surface protruding beyond the surface of the lower mold core body 21 by a height of 0.1 mm.

[0039] Start the injection molding machine to move the upper mold core 1 and the lower mold core 2 relative to each other and close the mold. During the mold closing process, the positioning block 226 of the polymer seal 22 on the lower mold core 2 extends into the upper mold core body 11 for positioning. Adhesive material is injected through the injection channel 14, flowing into the molding cavity formed by the first upper mold molding groove 131, the second upper mold molding groove 132, the corresponding insert 12, and the lower mold molding groove 23. When the adhesive material fills the lower mold molding groove 23, the polymer seal 22 deforms due to the pressure inside the cavity. The deformed polymer seal 22 fills the gap between itself and the lower mold core body 21, preventing the adhesive material from overflowing from the mold gaps. After the adhesive material cures, start the injection molding machine to open the mold, separating the upper mold core 1 and the lower mold core 2. Then, the ejector pin moves along the ejection channel 24 of the lower mold forming core 2, ejecting the formed part from the first lower mold forming groove 231 and the second lower mold forming groove 232, completing the demolding operation.

[0040] This utility model is a glue-free structure with stable and reliable characteristics. Through the matching of upper and lower mold cores and the design of polymer sealing components, the polymer sealing components are interference-fitted and slightly higher than the end face of the lower mold. When the mold is closed, the deformation fills the gap, effectively preventing glue overflow, improving product precision and appearance quality, and avoiding damage to the sealing components when the mold is closed.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A glue-free structure, characterized in that, include: The upper mold forming core (1) and the lower mold forming core (2) are set opposite to each other; The upper mold forming core (1) includes an upper mold core body (11) and a plurality of inserts (12) embedded in the upper mold core body (11). The upper mold core body (11) has an upper mold forming groove (13) formed by recessing inward from the side opposite to the lower mold forming core (2). The lower mold forming core (2) includes a lower mold core body (21) and a plurality of polymer sealing members (22) that are interference-fitted into the lower mold core body (21). The lower mold core body (21) has a lower mold forming groove (23) formed by recessing inward from the side opposite to the upper mold forming core (1). The ends of several of the polymer seals (22) are respectively placed on the end face of the lower mold forming groove (23). The end face of the polymer seal (22) is slightly higher than the end face of the lower mold core body (21), and its height is the deformation of the polymer seal (22).

2. The adhesive-free structure according to claim 1, characterized in that, The height of the end face of the polymer seal (22) above the end face of the lower mold core body (21) is 0.1 mm.

3. The adhesive-free structure according to claim 1, characterized in that, The lower mold core body (21) has a groove (15) formed by recessing from the surface inward. One end of the polymer seal (22) extends outward to form a retaining protrusion (125). The retaining protrusion (125) abuts against the groove (15) to fix the position of the polymer seal (22).

4. The adhesive-free structure according to claim 1, characterized in that, The polymer seal (22) is recessed inward on the side corresponding to the lower mold forming groove (23) to form a shaping groove (225).

5. The adhesive-free structure according to claim 1, characterized in that, The polymer sealing component (22) is provided with a positioning block (226) extending from its surface toward the upper mold forming core (1). The upper mold core body (11) is provided with a positioning hole corresponding to the position of the positioning block (226). When the mold is closed, the positioning block (226) extends into the positioning hole.

6. The adhesive-free structure according to claim 1, characterized in that, The lower mold forming core (2) has at least one ejection channel (24), which passes through the lower mold core body (21) and is connected to the lower mold forming groove (23) for ejecting the formed product.

7. The adhesive-free structure according to claim 1, characterized in that, The lower mold forming groove (23) includes a first lower mold forming groove (231) and a second lower mold forming groove (232), and the polymer sealing element (22) is located at both ends of the first lower mold forming groove (231) and the second lower mold forming groove (232).

8. The adhesive-free structure according to claim 7, characterized in that, The polymer sealing element (22) includes a first shaped sealing element (221) and a second shaped sealing element (222). The first shaped sealing element (221) and the second shaped sealing element (222) are disposed at both ends of the first lower mold forming groove (231), and their corresponding sides are recessed inward to form a shaped groove (225).

9. The adhesive-free structure according to claim 7, characterized in that, The polymer seal (22) includes a third shaped seal (223) and a fourth shaped seal (224), which are disposed at both ends of the second lower mold forming groove (232).

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