Excess material and air venting structure for a mold core

Abstract

The utility model discloses a kind of excess material and air exhaust structure of mould core, including first mould and second mould, which are provided with multiple core holes jointly;Lower core is provided in the core hole of first mould and second mould;Gas guide hole is opened on the inner side wall of lower core;Exhaust groove is opened on the outer side wall of lower core.Due to the replacement of gas running groove structure into gas guide hole structure, the appearance of product is affected very little by the excess material formed at gas guide hole, and the excess material formed at gas guide hole will be automatically disconnected due to shear force when demoulding, so artificial cutting is not needed, and the appearance of product will not be affected.The excess material and air exhaust structure of mould core provided by the utility model can effectively exhaust air in cavity, avoid affecting the appearance of product, simplify the processing process of rubber excess material, reduce maintenance cost and improve overall production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically, it relates to a structure for removing excess material and air from a mold core. Background Technology

[0002] In the field of rubber mold manufacturing, during the injection molding process, in order to remove air from the cavity and prevent the formation of air bubbles, such as... Figure 1 As shown, air vents are typically created in the core. While this design effectively removes air, it presents several significant problems in practical applications, negatively impacting production efficiency and product quality.

[0003] First, product appearance is damaged. The design of traditional air vents often leaves obvious marks on the surface of rubber products. These marks not only affect the product's aesthetics but may also reduce its market competitiveness. To remove these marks, manufacturers usually need additional manual operations, such as grinding or polishing, which undoubtedly increases production costs and time. Second, there is the problem of rubber residue adhesion. During the injection molding process, rubber material sometimes overflows through the air vents, forming residue that adheres to the mold surface. This residue is not only difficult to clean but may also mix into new products during the next injection molding, leading to product defects or non-conformities. Cleaning this residue requires downtime and consumes a lot of manpower, seriously affecting production efficiency. In addition, maintenance costs increase. Because the design of the air vents easily leads to the adhesion of rubber residue, the cleaning and maintenance of the mold becomes more frequent and complex. In the long run, this not only increases mold wear but also shortens the mold's lifespan, further increasing production costs.

[0004] In summary, the traditional air vent design of rubber molds has shortcomings in terms of air venting effect, product appearance, rubber residue handling, and mold maintenance. Utility Model Content

[0005] The purpose of this utility model is to provide a residual material and air discharge structure for mold cores, which solves the technical problem in the prior art that, due to the design of the air vent, rubber material is discharged along with the air, resulting in damage to the product appearance, adhesion of rubber residue, and increased maintenance costs.

[0006] The objective of this utility model can be achieved through the following technical solutions: A structure for removing excess material and air from a mold core includes a first mold and a second mold, which together have multiple core holes; a lower core is provided in the core holes of both the first mold and the second mold; an air guide hole is provided on the inner side wall of the lower core; and an exhaust groove is provided on the outer side wall of the lower core.

[0007] Furthermore, the air guide holes and exhaust grooves are used to open up channels between the inside and outside of the core cavity, allowing air to escape from the cavity when the rubber is injected into the core.

[0008] Furthermore, the excess material formed at the air vent will automatically break off due to shearing force during demolding.

[0009] Furthermore, the first mold or the second mold has a retention cavity corresponding to the position of the air guide hole.

[0010] Furthermore, when the indwelling cavity, the platform supporting the first mold or the second mold, and the lower core are fitted together, they form a container for holding the adhesive material.

[0011] Furthermore, the lower core has a groove corresponding to the position of the retention cavity.

[0012] Furthermore, the cross-section of the groove is triangular.

[0013] Furthermore, the angle at the upper end of the groove is 18°.

[0014] The beneficial effects of this utility model are: 1. This utility model utilizes air guide holes and venting grooves to open up channels between the inside and outside of the mold core cavity, allowing air to escape from the cavity when rubber is injected into the core. Because the venting groove structure is replaced by an air guide hole structure, the product appearance is minimally affected by residual material formed at the air guide holes. Furthermore, the residual material formed at these air guide holes will automatically break off due to shearing force during demolding, eliminating the need for manual cutting and thus not affecting the product's appearance. The residual material and air venting structure of the mold core provided by this utility model effectively vents air from the cavity, avoids affecting the product's appearance, simplifies the handling of residual rubber material, reduces maintenance costs, and improves overall production efficiency.

[0015] 2. In the process of venting through the air vent, the rubber material is discharged to the outside of the core along with the air. At this time, since a retention cavity is opened on the mold, the retention cavity, the platform supporting the first mold or the second mold, and the lower core will form a container for the rubber material when they are in contact (i.e. when the mold is closed). The rubber material inside the core can be stored in the container when it is discharged, thus preventing the rubber from running around.

[0016] 3. The design of this utility model, through the groove, can be used in conjunction with the retention cavity to fix the excess material in the area, making it easier for operators to clean. The rubber excess material groove is designed as a triangle, and its upper angle is 18°, which can effectively fix it in the lower mold, making it even easier to clean. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the lower core structure in the existing technology; Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a cross-sectional view of the lower core of this utility model; Figure 4 This is a schematic diagram of the groove structure in this utility model; Figure 5 This is a schematic diagram of the air guide hole structure in this utility model; Figure 6 This is a schematic diagram of the structure of the residual material after molding in this utility model.

[0018] The attached diagram lists the components represented by each number as follows: 1. First mold; 2. Second mold; 3. Lower core; 4. Upper core; 5. Groove; 6. Air guide hole; 7. Exhaust groove; 8. Retention cavity. Detailed Implementation

[0019] 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.

[0020] Please see Figure 2 - Figure 3 As shown, a mold core residual material and air discharge structure includes a first mold 1 and a second mold 2. The first mold 1 and the second mold 2 are provided with a plurality of core holes. The core holes of the first mold 1 and the second mold 2 are provided with a lower core 3, and an upper core 4 is provided above the lower core 3.

[0021] Please refer to it again. Figure 3 , Figure 4 as well as Figure 5 As shown, to solve the technical problem in the prior art where air venting grooves leave traces on the product after molding, affecting the product's appearance and requiring manual removal, this utility model has the following structural design: Air guide holes 6 are provided on the inner sidewall of the lower core 3; venting grooves 7 are provided on the outer sidewall of the lower core 3. In practical application, the air guide holes 6 and venting grooves 7 are used to open up channels between the inside and outside of the core cavity, allowing air to escape from the cavity when the resin is injected into the core. Because the air venting groove structure is replaced by the air guide hole 6 structure, the product appearance is minimally affected by the residual material formed at the air guide hole 6. Furthermore, the residual material formed at the air guide hole 6 will automatically break off due to shearing force during demolding, thus eliminating the need for manual cutting and preventing any impact on the product's appearance.

[0022] However, it should be noted that since the inside and outside of the cavity are connected by the air vent 6, the adhesive will also be discharged from the air vent 6 during the process of injecting the adhesive into the core.

[0023] Please refer to it again. Figure 3 As shown, to solve the above problems, this utility model also has the following structural design: a retention cavity 8 is provided in the first mold 1 or the second mold 2 corresponding to the position of the air guide hole 6. Specifically, during the air venting process of the air guide hole 6, the rubber material is discharged to the outside of the core along with the air. At this time, since the retention cavity 8 is provided on the mold, when the retention cavity 8, the platform supporting the first mold 1 or the second mold 2, and the lower core 3 are in contact (i.e., when the mold is closed), they will form a container to hold the rubber material. When the rubber material inside the core is discharged, it can be stored inside the container to prevent the rubber from running around.

[0024] Please refer to it again. Figure 3 As shown, furthermore, in order to fix the residual material generated in the retention cavity 8 area and place it in an easily cleanable area, this utility model has the following structural design: the lower core 3 has a groove 5 corresponding to the position of the retention cavity 8. Preferably, the cross-section of the groove 5 is triangular, but not limited to a triangle. Preferably, the angle of the upper end of the groove 5 is 18°, but not limited to 18°. Through the design of the groove 5, the residual material can be fixed in the area of ​​the retention cavity 8 (e.g., Figure 6 As shown, this is the residual material after molding, which facilitates cleaning by operators. The rubber residual material groove 5 is designed as a triangle, and its upper angle is 18°, which can effectively fix it to the lower mold, making it even easier to clean. The residual material and air discharge structure of the mold core provided by this utility model can effectively discharge the air in the cavity, avoid affecting the appearance of the product, simplify the handling process of rubber residual material, reduce maintenance costs, and improve overall production efficiency.

[0025] It should be noted that, in this document, terms such as “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.

[0026] 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.

Claims

1. A structure for removing excess material and air from a mold core, comprising a first mold (1) and a second mold (2), wherein the first mold (1) and the second mold (2) are provided with a plurality of core holes; a lower core (3) is provided in the core holes of both the first mold (1) and the second mold (2); characterized in that: The lower core (3) has an air guide hole (6) on its inner side wall and an exhaust groove (7) on its outer side wall.

2. The residual material and air discharge structure for a mold core according to claim 1, characterized in that: The air guide hole (6) and the exhaust groove (7) are used to open the channels between the inside and outside of the core cavity, so that air can be discharged from the cavity when the rubber is injected into the core.

3. The residual material and air discharge structure for a mold core according to claim 2, characterized in that: The excess material formed at the air vent (6) will automatically break off due to shearing force during demolding.

4. The residual material and air discharge structure for a mold core according to claim 1, characterized in that: The first mold (1) or the second mold (2) has a retention cavity (8) at the position corresponding to the air guide hole (6).

5. The residual material and air discharge structure for a mold core according to claim 4, characterized in that: When the indwelling cavity (8), the platform supporting the first mold (1) or the second mold (2) and the lower core (3) are attached together, they form a container for holding the adhesive.

6. The residual material and air discharge structure for a mold core according to claim 4, characterized in that: The lower core (3) has a groove (5) corresponding to the position of the retention cavity (8).

7. The residual material and air discharge structure for a mold core according to claim 6, characterized in that: The cross-section of the groove (5) is triangular.

8. The residual material and air discharge structure for a mold core according to claim 7, characterized in that: The angle at the upper end of the groove (5) is 18°.

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