Injection mold for producing thin-wall type product

Abstract

The utility model discloses an injection mold for producing a thin-wall type product, which comprises a lower mold, a lower mold cavity is arranged at the top of the lower mold, an inner mold cavity is arranged in the lower mold, and side water pumps are fixedly connected on the peripheral side walls of the lower mold. By arranging a lower mold, a lower mold cavity, an inner mold cavity, a side water pump, a side water inlet pipe, a side flow valve, a lower water pump, a lower water inlet pipe, a lower flow valve, a cooling box, a protective net cover and a refrigeration plate, when an external upper mold and the lower mold are combined, after injection molding is completed, the side water pump and the lower water pump are started at the same time, and cooling liquid is uniformly injected into the inner mold cavity from multiple points; and after the inner mold cavity is filled with the cooling liquid, the lower water pump is reversely started, the cooling liquid in the inner mold cavity is discharged, water circulation is formed by the cooling liquid and the side water pump, and the lower mold is further cooled, so that the thin-wall type product is rapidly and uniformly cooled, the cooling efficiency and the cooling uniformity degree are improved, and the cooling size deviation is reduced.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold for producing thin-walled products. Background Technology

[0002] Injection molds are key tools used in the injection molding process, primarily for manufacturing plastic products with complex shapes. They work by heating and melting plastic material, injecting it into the cavity of a mold, and allowing it to cool and solidify to obtain the desired plastic product. Injection molds not only give plastic products their complete structure but also ensure dimensional accuracy.

[0003] In existing injection molds for producing thin-walled products, coolant is typically injected into the mold during cooling molding. The coolant carries away the heat inside the mold, allowing the thin-walled product to cool down quickly. However, because the walls of thin-walled products are very thin, the end where the coolant is injected cools first, while the end further away cools later. This can easily lead to uneven cooling and large dimensional deviations. Utility Model Content

[0004] The purpose of this invention is to provide an injection mold for producing thin-walled products. When the upper and lower molds are engaged and injection molding is completed, the side water pump and the lower water pump are started simultaneously to inject coolant into the inner mold cavity from multiple points evenly, thereby forming multi-point uniform and rapid cooling. After the inner mold cavity is filled, the lower water pump is started in reverse to discharge the coolant in the inner mold cavity, forming a water circulation with the side water pump to further cool the lower mold. This allows the thin-walled product to be cooled quickly and evenly, improving cooling efficiency and uniformity, and reducing cooling dimensional deviations.

[0005] To achieve the above objectives, an injection mold for producing thin-walled products is provided, comprising: a lower mold, a lower mold cavity at the top of the lower mold, an inner mold cavity inside the lower mold, a side water pump fixedly connected to the four side walls of the lower mold, a side water inlet pipe fixedly connected to the end of the side water pump away from the lower mold, a side flow valve fixedly connected to the circumferential surface of the side water inlet pipe, a lower water pump fixedly connected to the bottom of the lower mold, a lower water inlet pipe fixedly connected to the end of the lower water pump away from the lower mold, a lower flow valve fixedly connected to the circumferential surface of the lower water inlet pipe, a cooling box disposed below the lower mold, a protective mesh fixedly connected to the bottom of the cooling box, and a cooling plate fixedly connected to the bottom of the cooling box, the cooling plate being located inside the protective mesh.

[0006] According to the injection mold for producing thin-walled products, the side water pump is fixedly connected to a side water outlet pipe at one end near the lower mold, and the lower water pump is fixedly connected to a lower water outlet pipe at one end near the lower mold. Both the side water outlet pipe and the lower water outlet pipe are located inside the lower mold, and both the side water outlet pipe and the lower water outlet pipe communicate with the inner mold cavity.

[0007] According to the injection mold for producing thin-walled products, there are four side water pumps, four side water inlet pipes, four side flow valves, and four side water outlet pipes, which are symmetrically distributed around the lower mold.

[0008] According to the injection mold for producing thin-walled products, the water pump is a circulating water pump.

[0009] According to the injection mold for producing thin-walled products, the bottom of the lower mold is fixedly connected with a support column, and the number of the support columns is four, which are symmetrically distributed at the four corners of the bottom of the lower mold. The bottom of the support column is fixedly connected to a cooling box.

[0010] According to the injection mold for producing thin-walled products, the interior of the cooling box is filled with coolant, and the protective mesh cover is a stainless steel mesh cover.

[0011] According to the injection mold for producing thin-walled products, the cooling end of the cooling plate is located inside the cooling box, and the heating end of the cooling plate is located inside the protective mesh cover.

[0012] The above solution has the following beneficial effects: By setting up a lower mold, lower mold cavity, inner mold cavity, side water pump, side water inlet pipe, side flow valve, lower water pump, lower water inlet pipe, lower flow valve, cooling box, protective mesh cover, and cooling plate, when the upper mold and lower mold are engaged and injection molding is completed, the side water pump and lower water pump are started simultaneously to inject coolant into the inner mold cavity from multiple points evenly, thereby forming multi-point uniform and rapid cooling. When the inner mold cavity is full, the lower water pump is started in reverse to discharge the coolant in the inner mold cavity, forming a water circulation with the side water pump to further cool the lower mold, thereby enabling thin-walled products to cool quickly and evenly, improving cooling efficiency and cooling uniformity, and reducing cooling dimensional deviations.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a front view of an injection mold for producing thin-walled products according to this utility model;

[0016] Figure 2 This is a side view of an injection mold for producing thin-walled products according to the present invention.

[0017] Figure 3 This is a schematic diagram of the lower mold section structure of an injection mold for producing thin-walled products according to the present invention.

[0018] Figure 4 This is a cross-sectional structural diagram of the cooling box of an injection mold for producing thin-walled products according to the present invention.

[0019] Legend:

[0020] 1. Lower mold; 2. Lower mold cavity; 3. Inner mold cavity; 4. Side water pump; 5. Side water inlet pipe; 6. Side flow valve; 7. Lower water pump; 8. Lower water inlet pipe; 9. Lower flow valve; 10. Cooling box; 11. Protective mesh cover; 12. Refrigeration plate; 13. Support column. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-4This utility model embodiment discloses an injection mold for producing thin-walled products, comprising: a lower mold 1, a lower mold cavity 2 at the top of the lower mold 1, the lower mold 1 being a dedicated mold for producing thin-walled products, and the lower mold cavity 2 being a dedicated molding cavity for producing thin-walled products, which can be customized according to actual needs; an inner mold cavity 3 being provided inside the lower mold 1, the inner mold cavity 3 having a similar shape to the lower mold cavity 2, facilitating uniform cooling and molding during cooling; and side water pumps 4 being fixedly connected to the four side walls of the lower mold 1. A side water inlet pipe 5 is fixedly connected to one end of the lower mold 1, extending into the cooling tank 10. A side flow valve 6 is fixedly connected to the circumferential surface of the side water inlet pipe 5 to monitor the flow rate of the coolant injected into the inner mold cavity 3. A lower water pump 7 is fixedly connected to the bottom of the lower mold 1. The lower water pump 7 is a circulating water pump that can be started in both directions to achieve water pumping and drainage. A lower water inlet pipe 8 is fixedly connected to the end of the lower water pump 7 away from the lower mold 1, extending into the cooling tank 10. A side flow valve 6 is fixedly connected to the circumferential surface of the lower water inlet pipe 8. A lower flow valve 9 is used to monitor the flow rate of coolant injected into the inner mold cavity 3. A cooling box 10 is provided below the lower mold 1, and the interior of the cooling box 10 is filled with coolant. A protective mesh cover 11, which is made of stainless steel, is fixedly connected to the bottom of the cooling box 10. A cooling plate 12 is fixedly connected to the bottom of the cooling box 10, and the cooling plate 12 is located inside the protective mesh cover 11. The protective mesh cover 11 is used to protect the cooling plate 12. The cooling end of the cooling plate 12 is located inside the cooling box 10, and the heating end of the cooling plate 12 is located inside the inner mold cavity 3. Inside the protective mesh cover 11, the cooling plate 12 contains many pairs of N-type and P-type semiconductor materials connected in series to form thermopile. These thermopile pairs are sandwiched between two insulating and thermally conductive ceramic plates. When current passes through the thermopile, heat is transferred from one end to the other, forming a cooling end and a heating end. The cooling end of the cooling plate 12 cools the coolant inside the cooling box 10, while the heating end of the cooling plate 12 generates heat. External air dissipates heat from the heating end of the cooling plate 12 through the protective mesh cover 11.

[0023] The side water pump 4 is fixedly connected to a side water outlet pipe at one end near the lower mold 1, and the lower water pump 7 is fixedly connected to a lower water outlet pipe at one end near the lower mold 1. Both the side water outlet pipe and the lower water outlet pipe are located inside the lower mold 1 and are connected to the inner mold cavity 3. There are four side water pumps 4, four side water inlet pipes 5, four side flow valves 6 and four side water outlet pipes, which are symmetrically distributed around the lower mold 1. When the side water pump 4 is started synchronously, coolant can be injected into the inner mold cavity 3 at the same time, thereby forming multiple cooling points so that the thin-walled products inside the lower mold 1 can be cooled quickly and evenly.

[0024] The bottom of the lower mold 1 is fixedly connected to a support column 13. There are four support columns 13, which are symmetrically distributed at the four corners of the bottom of the lower mold 1. The bottom of the support column 13 is fixedly connected to the cooling box 10.

[0025] Working principle: The electrical structures in this utility model are connected to an external controller via wires. Then, the external controller synchronously starts the side water pump 4 and the bottom water pump 7 to quickly and evenly inject the coolant in the cooling tank 10 into the inner mold cavity 3 until it is completely filled. Then, the bottom water pump 7 is started in reverse to extract the coolant in the inner mold cavity 3 and inject it into the cooling tank 10. The side water pump 4 continues to inject, and the bottom water pump 7 continues to extract, forming a cooling cycle. This achieves rapid and uniform cooling and molding of thin-walled products in the lower mold 1. The coolant that has undergone heat exchange is further cooled by the cooling plate 12 to maintain its cooling function. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0026] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An injection mold for producing thin-walled products, comprising: The lower mold (1) is characterized in that a lower mold cavity (2) is provided at the top of the lower mold (1), an inner mold cavity (3) is provided inside the lower mold (1), a side water pump (4) is fixedly connected to the four sides of the lower mold (1), a side water inlet pipe (5) is fixedly connected to the end of the side water pump (4) away from the lower mold (1), a side flow valve (6) is fixedly connected to the circumferential surface of the side water inlet pipe (5), and a lower water pump is fixedly connected to the bottom of the lower mold (1). (7) The lower water pump (7) is fixedly connected to a lower water inlet pipe (8) at one end away from the lower mold (1). A lower flow valve (9) is fixedly connected to the circumferential surface of the lower water inlet pipe (8). A cooling box (10) is provided below the lower mold (1). A protective net cover (11) is fixedly connected to the bottom of the cooling box (10). A cooling plate (12) is fixedly connected to the bottom of the cooling box (10). The cooling plate (12) is located inside the protective net cover (11).

2. The injection mold for producing thin-walled products according to claim 1, characterized in that, The side water pump (4) is fixedly connected to a side water outlet pipe at one end near the lower mold (1), and the lower water pump (7) is fixedly connected to a lower water outlet pipe at one end near the lower mold (1). Both the side water outlet pipe and the lower water outlet pipe are located inside the lower mold (1), and both the side water outlet pipe and the lower water outlet pipe are connected to the inner mold cavity (3).

3. The injection mold for producing thin-walled products according to claim 2, characterized in that, The number of the side water pump (4), the side water inlet pipe (5), the side flow valve (6) and the side water outlet pipe are all four, and they are symmetrically distributed around the lower mold (1).

4. The injection mold for producing thin-walled products according to claim 1, characterized in that, The downspout pump (7) is a circulating water pump.

5. The injection mold for producing thin-walled products according to claim 1, characterized in that, The bottom of the lower mold (1) is fixedly connected to a support column (13). There are four support columns (13), which are symmetrically distributed at the four corners of the bottom of the lower mold (1). The bottom of the support column (13) is fixedly connected to the cooling box (10).

6. The injection mold for producing thin-walled products according to claim 1, characterized in that, The interior of the cooling tank (10) is filled with coolant, and the protective mesh cover (11) is a stainless steel mesh cover.

7. The injection mold for producing thin-walled products according to claim 1, characterized in that, The cooling end of the cooling plate (12) is located inside the cooling box (10), and the heating end of the cooling plate (12) is located inside the protective mesh cover (11).

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