Inverted injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to an inverted injection mold which comprises an upper plate, an upper mold plate, a lower mold plate, a supporting plate, a partition plate, a placing plate and a bottom plate from top to bottom, and an upper mold groove and a lower mold groove are formed in the opposite sides of the upper mold plate and the lower mold plate respectively. An upper mold core and a lower mold core are respectively arranged in the upper mold groove and the lower mold groove, and a mold cavity is formed between the upper mold core and the lower mold core after the upper mold core and the lower mold core are closed; the mold cavity is communicated with a pouring part, the pouring part comprises a glue inlet formed in the lower end of the bottom plate, a splitter plate communicated with the glue inlet is embedded in the placement plate, and a plurality of splitter strips communicated with the interior of the splitter plate are arranged on the upper end face of the splitter plate; the end part of the shunting strip is communicated with a shunting pipe which is vertically arranged and penetrates through the lower mold core, and the upper end of the shunting pipe is connected with a hot nozzle communicated with the mold cavity. The injection mold improves the production rate of injection products.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an inverted injection mold. Background Art

[0002] An injection mold is a tool for producing plastic products and also a tool for endowing plastic products with complete structures and precise dimensions; in the injection mold process, the heat-melted material is injected into the mold cavity under high pressure, and after cooling and solidification, the formed product is obtained.

[0003] For example, on May 2, 2023, a patent with the publication number CN218948339U and the name of an injection mold for a switch panel was disclosed, which includes an upper panel, a top plate, a heating plate, an upper mold opening plate, a lower mold opening plate, a support seat, a bottom plate and a lower panel from top to bottom in sequence. An upper mold core is embedded in the upper mold opening plate, and a lower mold core is embedded in the lower mold opening plate. After the upper mold core and the lower mold core are closed, a mold cavity is formed. This solution uses the upper mold opening plate and the lower mold opening plate to cover the upper mold core and the lower mold core respectively to fix the upper insert and the lower insert, with a simple structure and convenient disassembly, corresponding to various production requirements; however, the applicant found that it is an injection product using a positive injection mirror surface. In the positive injection mold, since the workpiece and the punching waste exist simultaneously in the working area of the mold, the second stamping can only be carried out after confirming that the punching waste is removed, so its productivity is relatively low. Summary of the Invention

[0004] In view of this, the purpose of the present utility model is to provide an inverted injection mold to solve the problem of relatively low productivity.

[0005] Based on the above purpose, the present utility model provides an inverted injection mold, which includes an upper plate, an upper template, a lower template, a support plate, a partition plate, a placement plate and a bottom plate from top to bottom. On one side of the upper template and the lower template facing each other, an upper mold groove and a lower mold groove are respectively opened. An upper mold core and a lower mold core are respectively arranged in the upper mold groove and the lower mold groove. After the upper mold core and the lower mold core are closed, a mold cavity is formed between them. The size and shape of the mold cavity are the same as those of the injection product; the mold cavity is communicated with a casting part, and the casting part includes a glue inlet arranged at the lower end of the bottom plate. A flow splitter plate communicated with the glue inlet is embedded in the placement plate. Multiple flow splitting strips communicated with the inside of the flow splitter plate are arranged on the upper end surface of the flow splitter plate. The end of the flow splitting strip is communicated with a vertically arranged flow splitting tube that penetrates the lower mold core, and the upper end of the flow splitting tube is connected with a hot nozzle communicated with the mold cavity.

[0006] Optionally, oil cylinders are embedded on both sides of the placement plate. There are two support plates. A thimble plate connected to the telescopic end of the oil cylinder is arranged between the two support plates. The upper end of the thimble plate is connected with a top plate, and multiple ejector pins penetrating the lower mold core are arranged on the top plate.

[0007] Optionally, a sleeve sleeving the outer side of the shunt pipe is embedded on the lower die core. A small ring pipe and a large ring pipe are respectively arranged at the upper end and the lower end of the sleeve. The small ring pipe and the large ring pipe are both communicated with a pipe located outside the sleeve. A communicating pipe communicating the small ring pipe and the large ring pipe is arranged in the middle of the sleeve.

[0008] Optionally, the diameter of the small ring pipe is smaller than that of the large ring pipe.

[0009] Optionally, the communicating pipe is a spiral conveying pipe.

[0010] Optionally, the diameter of the upper end of the spiral conveying pipe is smaller than that of the lower end of the spiral conveying pipe.

[0011] The beneficial effects of the present utility model: A flip-chip injection mold provided by the present utility model adopts flip-chip injection molding, which improves the productivity and the yield rate of injection-molded products and reduces the cost of injection-molded products. In addition, the molten plastic enters the manifold through the glue inlet, and then comes to the shunt pipe through a plurality of shunt bars. The plurality of shunt pipes are arranged at equal intervals, and the hot nozzles connected to the upper ends of the shunt pipes uniformly inject the molten plastic into the mold cavity, where it is cooled and solidified. The injection-molded product is formed in the mold cavity between the upper die core and the lower die core, which improves the productivity and the yield rate of the injection-molded products. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 is a structural schematic diagram of the present utility model;

[0014] Figure 2 is a top view structural schematic diagram of the present utility model;

[0015] Figure 3 is Figure 2 a structural schematic diagram of the cross-section A-A in

[0016] Figure 4 is a bottom view structural schematic diagram of the present utility model;

[0017] Figure 5 is a structural schematic diagram of the upper template of the present utility model;

[0018] Figure 6 is a structural schematic diagram of the connection between the lower die core and the casting part of the present utility model;

[0019] Figure 7 This is a schematic structural diagram of the sleeve of the present utility model.

[0020] In the figure: 1, upper template; 2, upper die slot; 3, upper die core; 4, lower template; 5, lower die slot; 6, lower die core; 7, bottom plate; 8, upper plate; 9, support plate; 10, placement plate; 11, partition plate; 12, glue inlet; 13, flow splitter plate; 14, flow splitting strip; 15, flow splitting pipe; 16, hot nozzle; 17, oil cylinder; 18, ejector plate; 19, sleeve; 20, small ring pipe; 21, large ring pipe. Specific embodiments

[0021] To make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the following further describes the present utility model in detail with reference to specific embodiments and the accompanying drawings.

[0022] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present utility model should have the ordinary meaning understood by those with ordinary skills in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0023] Such as Figures 1 to 7As shown in the figure, an inverted injection mold includes an upper plate 8, an upper template 1, a lower template 4, a support plate 9, a partition plate 11, a placement plate 10, and a bottom plate 7 from top to bottom. On one side of the upper template 1 and the lower template 4 facing each other, an upper mold cavity 2 and a lower mold cavity 5 are respectively provided. An upper mold core 3 and a lower mold core 6 are respectively arranged in the upper mold cavity 2 and the lower mold cavity 5. After the upper mold core 3 and the lower mold core 6 are closed, a mold cavity is formed between them. The size and shape of the mold cavity are the same as those of the injection product. When injection molding with the mold closed, the injection product is specifically formed in the mold cavity between the upper mold core 3 and the lower mold core 6. The mold cavity is communicated with a pouring member. The pouring member includes a glue inlet 12 arranged at the lower end of the bottom plate 7. A manifold plate 13 communicated with the glue inlet 12 is embedded in the placement plate 10. A plurality of flow dividing strips 14 communicated with the inside of the manifold plate 13 are arranged on the upper end surface of the manifold plate 13. The end of the flow dividing strip 14 is communicated with a flow dividing tube 15 arranged vertically and penetrating through the lower mold core 6. The upper end of the flow dividing tube 15 is connected with a hot nozzle 16 communicated with the mold cavity.

[0024] This injection mold adopts inverted injection molding, which improves the production rate and yield of injection products and reduces the cost of injection products. In addition, the molten plastic enters the manifold plate 13 through the glue inlet 12, and then comes to the flow dividing tubes 15 through a plurality of flow dividing strips 14. The plurality of flow dividing tubes 15 are arranged at equal intervals. The hot nozzles 16 connected to the upper ends of the flow dividing tubes 15 evenly inject the molten plastic into the mold cavity, where it cools and solidifies. The injection product is formed in the mold cavity between the upper mold core 3 and the lower mold core 6, improving the production rate and yield of the injection product. In addition, this injection mold is used to inject the switch panel injection product with a mirror surface. The wall thickness of the switch panel injection product can be as low as.mm at the lowest, achieving cost reduction and efficiency increase for the injection product.

[0025] Oil cylinders 17 are embedded on both sides of the placement plate 10. There are two support plates 9. A ejector pin plate 18 connected to the telescopic end of the oil cylinder 17 is arranged between the two support plates 9. The upper end of the ejector pin plate 18 is connected with a top plate. A plurality of ejector pins penetrating through the lower mold core 6 are arranged on the top plate. During demolding, the oil cylinder 17 is started to drive the ejector pin plate 18 to move, driving a plurality of ejector pins to simultaneously eject the injection product molded in the mold cavity, so that the injection product is evenly stressed during demolding and the demolding action can be completed at one time.

[0026] A sleeve 19 sleeving outside the flow dividing pipe 15 is embedded on the lower die core 6. A small ring pipe 20 and a large ring pipe 21 are respectively arranged at the upper end and the lower end of the sleeve 19. The diameter of the small ring pipe 20 is smaller than that of the large ring pipe 21. Both the small ring pipe 20 and the large ring pipe 21 are communicated with a pipe located outside the sleeve 19. A communicating pipe communicating the small ring pipe 20 and the large ring pipe 21 is arranged in the middle of the sleeve 19. In order to facilitate the cooling or heating and heat preservation of the injection molded product, by inputting a liquid such as a cooling solution or a heating and heat preservation solution into the pipe, the liquid can come to the small ring pipe 20 through the large ring pipe 21 and the communicating pipe, and then be discharged through the pipe communicated with the small ring pipe 20, so as to realize the cooling or heating and heat preservation of the injection molded product, and improve the yield and production efficiency of the injection molded product.

[0027] The communicating pipe is a spiral conveying pipe. The diameter of the upper end of the spiral conveying pipe is smaller than that of the lower end of the spiral conveying pipe. The arrangement of the spiral conveying pipe facilitates the longer residence time of the liquid entering the sleeve 19 through the pipe in the sleeve 19. The liquid can be a cooling solution and a heating and heat preservation solution, thereby improving the cooling or heating effect, and improving the yield and production efficiency of the injection molded product.

[0028] Those of ordinary skill in the art should understand that: the discussion of any embodiment above is only exemplary, and is not intended to imply that the scope of the present invention is limited to these examples; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, and they are not provided in detail for the sake of brevity.

[0029] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations falling within the broad scope of the appended claims. Therefore, any omission, modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An inverted injection mold, characterized in that, It includes an upper plate (8), an upper template (1), a lower template (4), a support plate (9), a partition plate (11), a placement plate (10) and a bottom plate (7) from top to bottom. On one side where the upper template (1) and the lower template (4) face each other, an upper die cavity (2) and a lower die cavity (5) are respectively formed. An upper die core (3) and a lower die core (6) are respectively arranged in the upper die cavity (2) and the lower die cavity (5). After the upper die core (3) and the lower die core (6) are closed, a die cavity is formed between them. The size and shape of the die cavity are consistent with those of the injection molded product. The die cavity is communicated with a casting member. The casting member includes a glue inlet (12) arranged at the lower end of the bottom plate (7). A flow splitter plate (13) communicated with the glue inlet (12) is embedded in the placement plate (10). A plurality of flow splitting strips (14) communicated with the inside of the flow splitter plate (13) are arranged on the upper end surface of the flow splitter plate (13). The end of the flow splitting strip (14) is communicated with a flow splitting pipe (15) arranged vertically and penetrating through the lower die core (6). The upper end of the flow splitting pipe (15) is connected with a hot nozzle (16) communicated with the die cavity.

2. The inverted injection mold according to claim 1, wherein, Oil cylinders (17) are embedded on both sides of the placement plate (10). There are two support plates (9). A ejector pin plate (18) connected to the telescopic end of the oil cylinder (17) is arranged between the two support plates (9). The upper end of the ejector pin plate (18) is connected with a top plate. A plurality of ejector pins penetrating through the lower die core (6) are arranged on the top plate.

3. The inverted injection mold according to claim 1, characterized in that, A sleeve (19) sleeved outside the flow splitting pipe (15) is embedded on the lower die core (6). A small ring pipe (20) and a large ring pipe (21) are respectively arranged at the upper end and the lower end of the sleeve (19). The small ring pipe (20) and the large ring pipe (21) are both communicated with a pipe located outside the sleeve (19). A communication pipe communicating the small ring pipe (20) and the large ring pipe (21) is arranged in the middle of the sleeve (19).

4. The inverted injection mold according to claim 3, characterized in that, The diameter of the small ring pipe (20) is smaller than that of the large ring pipe (21).

5. A flip-chip injection mold according to claim 3 or 4, characterized in that, The communication pipe is a spiral conveying pipe.

6. The inverted injection mold according to claim 5, characterized in that, The diameter of the upper end of the spiral conveying pipe is smaller than that of the lower end of the spiral conveying pipe.

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