Submarine glue feeding injection mold

Abstract

The utility model discloses a latent glue feeding injection mold, which relates to the technical field of molds, and comprises an upper mold and a lower mold, the upper mold is provided with an upper mold core, the lower mold is provided with a lower mold core, and the upper mold core and the lower mold core are mutually butted to form a mold cavity for forming a product; an injection molding runner is arranged between the upper mold and the lower mold, the injection molding runner comprises a main runner and a sub-runner connected to the main runner, the sub-runner comprises a first runner arranged on the parting surface of the lower mold core and a second runner arranged in the lower mold core, and the second runner is in butt joint with the mold cavity; a first protrusion corresponding to the mold cavity is arranged on the parting surface of the lower mold core in a protruding mode, the second runner is communicated to the first protrusion, a glue injection opening is formed in the surface of the first protrusion, a second protrusion corresponding to the mold cavity is arranged on the parting surface of the upper mold core in a protruding mode, and the second protrusion corresponds to the first protrusion. A spacing distance is formed between the second bulge and the first bulge; and the appearance quality of the product is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and particularly relates to an injection mold with a submarine gate system. Background Art

[0002] A mold is a tool used in industrial production to obtain various molds and tools for products through injection molding, blow molding, extrusion molding, die casting, forging, smelting, stamping, etc. In short, a mold is a tool for making formed articles. Such a tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the surface of an article by changing the physical state of the formed material, and is known as the "mother of industry". An injection mold is a tool for producing plastic products. Generally, an injection mold consists of an upper mold and a lower mold. When injection molding, the upper mold and the lower mold are closed to form a runner system and a cavity for the plastic product. During injection molding, the mold is clamped on an injection molding machine, molten plastic is injected into the cavity, and is cooled and formed in the cavity. At the same time, the molten plastic is also cooled into runner system condensate in the runner system. After the plastic product is formed, the upper mold and the lower mold are separated, and the plastic product is ejected from the cavity by an ejection system and leaves the mold. Finally, the upper mold and the lower mold are closed again for the next injection molding, and the whole injection molding process is carried out cyclically.

[0003] As Figure 1 shown, for a plastic part product with an inclined surface on its outer peripheral side and a through hole vertically opened on its end surface, in the conventional injection molding process, generally, injection is carried out at the center edge of one of its inclined surfaces. However, during the demolding process of the product, since the rubber material at the inclined surface of the product is relatively thin, the inclined surface is prone to partial warping when disconnected from the gate position, resulting in appearance defects.

[0004] Therefore, it is necessary to propose an improved technical solution to solve the above problems. Content of the Utility Model

[0005] The utility model aims to provide a technical solution that can solve the above problems to overcome the above deficiencies.

[0006] An injection mold with a submarine gate system includes an upper mold and a lower mold. The upper mold has an upper mold core, and the lower mold has a lower mold core. The upper mold core and the lower mold core are mutually butted to form a cavity for molding a product.

[0007] An injection runner is arranged between the upper mold and the lower mold. The injection runner includes a main runner and a sub-runner connected to the main runner. The sub-runner includes a first runner arranged on the parting surface of the lower mold core and a second runner arranged in the lower mold core, and the second runner is butted against the cavity.

[0008] On the parting surface of the lower mold core, a first protrusion corresponding to the mold cavity is convexly provided. The second runner is communicated to the first protrusion, and a glue injection port is formed on the surface of the first protrusion. On the parting surface of the upper mold core, a second protrusion corresponding to the mold cavity is convexly provided. The second protrusion corresponds to the first protrusion, and there is a spacing distance between the second protrusion and the first protrusion.

[0009] As a further solution of the present utility model: The second runner is in a C shape, and one end of the second runner corresponding to the first runner is gradually reduced in diameter towards one end of the second runner corresponding to the glue injection port.

[0010] As a further solution of the present utility model: The lower mold core is fitted with an inlay component. The inlay component includes a first inlay and a second inlay that are butt-jointed with each other. A first groove is formed on the inner side of the first inlay, and a second groove is formed on the inner side of the second inlay. The first groove and the second groove are butt-jointed and jointly form the second runner.

[0011] As a further solution of the present utility model: A first convex block is convexly provided on the upper end surface of the first inlay, and a second convex block is convexly provided on the upper end surface of the second inlay. The first convex block and the second convex block are butt-jointed with each other and jointly form the first protrusion.

[0012] As a further solution of the present utility model: The connection part of the first convex block and the second convex block forms the glue injection port. The first convex block is provided with a first chamber communicated with the first groove, and the second convex block is provided with a second chamber communicated with the second groove. The first chamber and the second chamber are butt-jointed with each other and jointly form a channel for communicating the second runner with the glue injection port.

[0013] As a further solution of the present utility model: Fixing grooves that jointly act on the first inlay and the second inlay are formed on the parting surface of the lower mold core. Limiting structures are convexly provided on one side of the first inlay and the second inlay corresponding to the fixing grooves.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] By utilizing the structural features of the product, the present utility model improves the conventional way of injecting glue at the center edge of the product to a submersible glue injection method corresponding to the through hole of the product, thereby effectively transferring the water inlet position of the injection runner formed on the surface of the product to the through hole of the product. After the product is demolded, the surface appearance of the product is not affected, and thus the quality of the product appearance is effectively guaranteed.

[0016] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the attached drawings required for the description of the embodiments or the prior art. Obviously, the attached drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other attached drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the product of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the cooperation between the upper die core and the lower die core of the present invention;

[0020] Figure 3 It is a schematic structural diagram of the lower die core of the present invention;

[0021] Figure 4 It is Figure 3 The enlarged structural diagram of part A in

[0022] Figure 5 It is Figure 3 The enlarged structural diagram of part B in

[0023] Figure 6 It is a schematic structural diagram of the upper die core;

[0024] Figure 7 It is a schematic structural diagram of the first insert and the second insert.

[0025] The reference numerals and names in the drawings are as follows:

[0026] 1. Upper die core; 2. Lower die core; 3. Main runner; 4. Sub - runner; 5. First runner; 6. Second runner; 7. First protrusion; 8. Glue injection port; 9. Second protrusion; 10. Mosaic assembly; 11. First insert; 12. Second insert; 13. First groove; 14. Second groove; 15. First convex block; 16. Second convex block; 17. First chamber; 18. Second chamber; 19. Limiting structure; 20. Through hole. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] Please refer to Figure 1-7, in the embodiment of the present utility model, an injection mold with a submarine gate includes an upper mold and a lower mold. The upper mold has an upper mold core 1, and the lower mold has a lower mold core 2. The upper mold core 1 and the lower mold core 2 are butt-jointed to form a cavity for molding a product;

[0029] An injection runner is arranged between the upper mold and the lower mold. The injection runner includes a main runner 3 and a sub-runner 4 connected to the main runner 3. The sub-runner 4 includes a first runner 5 arranged on the parting surface of the lower mold core 2 and a second runner 6 arranged in the lower mold core 2, and the second runner 6 is docked with the cavity;

[0030] A first protrusion 7 corresponding to the cavity is convexly provided on the parting surface of the lower mold core 2. The second runner 6 communicates with the first protrusion 7 and forms a glue injection port 8 on the surface of the first protrusion 7. A second protrusion 9 corresponding to the cavity is convexly provided on the parting surface of the upper mold core 1. The second protrusion 9 corresponds to the first protrusion 7, and there is a spacing distance between the second protrusion 9 and the first protrusion 7.

[0031] In the technical solution of the present utility model, by providing a first runner 5 on the parting surface of the lower mold core 2 and combining with a second runner 6 formed in the lower mold core 2 and docked with the cavity and connected to the first runner 5, a submarine gate feeding method is formed. By convexly providing a first protrusion 7 corresponding to the cavity on the parting surface of the lower mold core 2 and combining with a second protrusion 9 corresponding to the cavity convexly provided on the parting surface of the upper mold core 1, the first protrusion 7 and the second protrusion 9 are in corresponding positions and show a tendency of docking, so as to form a through hole 20 of the product. And a glue injection port 8 connected to the second runner 6 can be provided on the first protrusion 7. Combining with the spacing distance between the first protrusion 7 and the second protrusion 9, a glue injection space is formed, so as to realize the transportation of the rubber material in the cavity and form the product. The present utility model improves the conventional feeding method at the center edge of the product to a submarine gate feeding method corresponding to the through hole 20 of the product by utilizing the structural characteristics of the product, so as to effectively transfer the gate position where the injection runner is formed on the product surface to the through hole 20 of the product, so that after the product is demolded, it does not affect the surface appearance of the product, and thus effectively guarantees the quality of the product appearance.

[0032] Among them, when the product is molded, a runner waste is formed between the first protrusion 7 and the second protrusion 9. After the product is demolded, the runner waste can be removed from the through hole 20 of the product by a reprocessing method.

[0033] In the embodiment of the present utility model, the second runner 6 is in a C shape, and one end of the second runner 6 corresponding to the first runner 5 is gradually reduced in diameter towards one end corresponding to the glue injection port 8 of the second runner 6.

[0034] The submarine gate is mostly in a C shape, which will not be elaborated here. Through the setting that the end of the second runner 6 corresponding to the first runner 5 gradually reduces in diameter towards the end corresponding to the injection port 8 of the second runner 6, the rubber material flowing at a high speed or near high speed in the first runner 5 can be effectively buffered through the second runner 6, thereby avoiding the occurrence of cold flow phenomenon and sintering phenomenon caused by too fast flow rate of the rubber material.

[0035] In the embodiment of the present utility model, the lower mold core 2 is fitted with an inlay assembly 10. The inlay assembly 10 includes a first insert 11 and a second insert 12 that are butt-jointed with each other. A first groove 13 is formed inside the first insert 11, and a second groove 14 is formed inside the second insert 12. The first groove 13 and the second groove 14 are butt-jointed and jointly form the second runner 6.

[0036] By fitting an inlay component in the lower mold and forming the second runner 6 through this inlay component, it is beneficial to simplify the processing. And by dividing the inlay component into the first insert 11 and the second insert 12, it is convenient to form the first groove 13 inside the first insert 11 and the second groove 14 inside the second insert 12, that is, the first groove 13 and the second groove 14 are butt-jointed together to form the second runner 6. While being convenient for processing, it is also beneficial to ensure the shape and its accuracy of the second runner 6.

[0037] In the embodiment of the present utility model, a first convex block 15 protrudes from the upper end surface of the first insert 11, and a second convex block 16 protrudes from the upper end surface of the second insert 12. The first convex block 15 and the second convex block 16 are butt-jointed with each other and jointly form the first protrusion 7.

[0038] The inlay component can not only form the second runner 6 but also form the first protrusion 7, which is beneficial to simplify the production of the lower mold core 2.

[0039] In the embodiment of the present utility model, the connection part of the first convex block 15 and the second convex block 16 forms the injection port 8. The first convex block 15 is provided with a first chamber 17 communicating with the first groove 13, and the second convex block 16 is provided with a second chamber 18 communicating with the second groove 14. The first chamber 17 and the second chamber 18 are butt-jointed with each other and jointly form a channel for communicating the second runner 6 and the injection port 8.

[0040] As described above, through the setting of the inlay component, while being beneficial to simplify the production and processing, it is also possible to adjust in time according to the molding condition of the product (especially reflected in the process of product realization / testing) by modifying the shapes of the first groove 13 (second groove 14), the first convex block 15 (second convex block 16), and the first chamber 17 (second chamber 18) inside the inlay component.

[0041] In the embodiment of the present utility model, a fixing groove that acts on the first insert 11 and the second insert 12 together is formed on the parting surface of the lower die insert 2, and a limiting structure 19 is convexly provided on one side of the first insert 11 and the second insert 12 corresponding to the fixing groove.

[0042] Through the arrangement of the limiting structure 19, the first insert 11 and the second insert 12 are prevented from separating from the fixing groove.

[0043] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model.

Claims

1. A latent injection mold, characterized in that: It comprises an upper mold and a lower mold, wherein the upper mold has an upper mold core, and the lower mold has a lower mold core, and the upper mold core and the lower mold core are connected to each other to form a mold cavity for molding products; An injection channel is arranged between the upper mold and the lower mold, the injection channel includes a main channel and a branch channel connected to the main channel, the branch channel includes a first channel arranged on the parting surface of the lower mold core and a second channel arranged in the lower mold core, and the second channel is connected to the mold cavity; A first protrusion corresponding to the mold cavity is convexly provided on the parting surface of the lower mold core, the second flow channel is connected to the first protrusion, and a glue injection port is formed on the surface of the first protrusion, and a second protrusion corresponding to the mold cavity is convexly provided on the parting surface of the upper mold core, the second protrusion corresponds to the first protrusion, and there is a spacing distance between the second protrusion and the first protrusion.

2. The latent injection mold according to claim 1, characterized in that: The second flow channel is in a C shape, and an end of the second flow channel corresponding to the first flow channel is gradually reduced in diameter toward an end of the second flow channel corresponding to the injection port.

3. The latent injection mold according to claim 1, characterized in that: The lower mold core is embedded with an inlay component, which includes a first inlay and a second inlay that are butted against each other. A first groove is provided on the inner side of the first inlay, and a second groove is provided on the inner side of the second inlay. The first groove and the second groove are butted against each other to form the second flow channel.

4. The latent injection mold according to claim 3, characterized in that: A first convex block is convexly provided on the upper end surface of the first insert, and a second convex block is convexly provided on the upper end surface of the second insert. The first convex block and the second convex block are butted against each other to form the first protrusion together.

5. The latent injection mold according to claim 4, characterized in that: The connection between the first protrusion and the second protrusion forms the glue injection port, the first protrusion is provided with a first chamber connected to the first groove, the second protrusion is provided with a second chamber connected to the second groove, the first chamber and the second chamber are connected to each other and jointly form a channel for connecting the second flow channel and the glue injection port.

6. The latent injection mold according to claim 3, characterized in that: A fixing groove that acts on the first insert and the second insert is formed on the parting surface of the lower mold core, and a limiting structure is protruded on one side of the first insert and the second insert corresponding to the fixing groove.

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