Injection mold capable of efficiently cooling

Abstract

The invention relates to the field of injection molds, and provides an injection mold capable of efficiently cooling, a plurality of inner fins are transversely and uniformly arranged in an inner cavity of a mold body, cooling water enters the inner cavity through a water inlet pipe, the cooling water flows in the inner cavity so as to cool the mold body, and when the cooling water flows through, the cooling water and the inner fins obtain a larger contact surface, so that the cooling effect is improved. A larger heat exchange area is obtained, so that heat absorption is better carried out, the mold body is cooled, and an injection molding part is cooled and formed; the inner cavity communicates with the guide pipe to discharge cooling water from the guide pipe into the water storage mechanism, and the water storage mechanism is connected with the spraying mechanism to further cool the mold.

Description

Technical Field

[0001] The present invention relates to the field of injection molds, and particularly to an injection mold capable of efficiently cooling down. Background Art

[0002] An injection mold is a key tool for plastic processing and forming. Molten plastic is injected into the mold cavity through an injection molding machine, and after cooling and solidifying, the product is demolded. The mold consists of a moving mold, a fixed mold, a gate, a runner, a cooling system, etc., and can accurately form complex structures with high dimensional accuracy. Its advantages include high production efficiency, short cycle, strong material adaptability, large-scale production, and long mold life, which can effectively reduce the manufacturing cost and is widely used in industries such as electronics, automobiles, and daily necessities.

[0003] The structure and size of the mold are designed according to the shape and size of the required product to ensure that the product can meet the expected quality and performance requirements. The cooling principle of the injection mold is mainly based on two methods: heat conduction and convection. During the injection process, the plastic material is injected into the mold cavity at a high temperature, and then it is necessary to cool down the mold and the injection molded part by water cooling or air cooling. Finally, the injection molded part is cooled and formed.

[0004] When the prior art cools by water cooling, due to the large amount of heat of the mold, a relatively large amount of cold water needs to pass through to achieve the required cooling purpose. A large amount of water is used during the cooling process, and the cooling efficiency still needs to be improved. Therefore, an injection mold capable of efficiently cooling down is needed. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an injection mold capable of efficiently cooling down, which solves the problems in the background art.

[0006] Based on the above purpose, the present invention provides an injection mold capable of efficiently cooling down, including a left mold and a right mold. The left mold and the right mold are symmetrically arranged left and right, and both include a mold body, a back plate, and a mounting plate. The mold body is fixed on the front surface of the back plate, the mounting plate is arranged at the back of the back plate, a mold groove is formed on the side of the mold body away from the back plate, and an inner cavity is arranged inside the mold body. It is characterized in that a plurality of inner fins are uniformly arranged in the transverse direction inside the inner cavity, and the inner fins are parallel to each other; a water inlet pipe communicating with the inside of the inner cavity is connected to the upper side of the mold body, and the water inlet pipe is connected to the cooling water source; a conduit communicating with the inside of the inner cavity is connected to the other side of the water inlet pipe on the upper side of the mold body, the other end of the conduit is communicated with a water storage mechanism, and a spraying mechanism is connected to cool down the mold body.

[0007] Preferably, the water storage mechanism includes a water storage tank, which is fixed between the back plate and the mounting plate. The other end of the conduit is communicated to the upper interior of the water storage tank, and a drain pipe communicated with its interior is also connected to the upper side of the water storage tank; the water storage tank is connected to a spraying mechanism to cool the mold body.

[0008] Preferably, first valves are installed on the water inlet pipe, the conduit and the drain pipe.

[0009] Preferably, the spraying mechanism includes a slot opened on the surface of one side of the mold body near the back plate, and a plurality of outer fins are vertically and evenly fixed in the slot. The outer fins are parallel to each other, and a plurality of spray pipes are vertically fixed on the surface of the back plate on the side of the slot. The spray pipes are parallel to each other and also parallel to the outer fins. A plurality of spray holes facing the outer fins are evenly arranged on the surface of the spray pipes; a water supply pipe communicated with its interior is connected to the lower side of the water storage tank, and the water supply pipe penetrates into the interior of the slot and is placed below the spray pipes, and the bottom of the spray pipes is communicated with the water supply pipe.

[0010] Preferably, a pressure pipe is also connected to the upper part of the water storage tank, and the pressure pipe is connected to a high-pressure gas source pipeline.

[0011] Preferably, second valves are installed on both the pressure pipe and the water supply pipe.

[0012] Preferably, a plurality of fans are installed at the bottom of the slot.

[0013] Preferably, a water-absorbing cotton is fixedly attached to the surface of the mold body in the slot, and the outer fins penetrate through the water-absorbing cotton.

[0014] Preferably, an injection hole is provided at the bottom of the mold cavity, and an injection pipe communicated with the injection hole is connected below the mold body, and the injection pipe is communicated to an injection molding machine.

[0015] Preferably, positioning grooves are provided on the surfaces of the four corners of the mold body of the left mold, and positioning pins matched with the positioning grooves are provided on the surfaces of the four corners of the mold body of the right mold.

[0016] The beneficial effects of the present invention: By horizontally and evenly arranging a plurality of inner fins in the inner cavity of the mold body, cooling water enters through the water inlet pipe in the inner cavity, and the cooling water flows in the inner cavity to cool the mold body. When the cooling water flows through, it obtains a larger contact surface with the inner fins and a larger heat exchange area, so as to better absorb heat and cool the mold body, so that the injection molded part is cooled and formed; the inner cavity is communicated with the conduit to discharge the cooling water from the conduit to the water storage mechanism, and the water storage mechanism is connected to the spraying mechanism to further cool the mold.

[0017] The catheter of the present invention is connected to the water storage tank of the water storage mechanism to drain the cooling water into the water storage tank. The water storage tank drains water through a drain pipe. The water storage tank is connected to a water spray pipe in a slot through a water supply pipe, and the water storage tank is pressurized through a pressure pipe, so that the spray holes of the water spray pipe spray water onto the outer fins. The outer fins are located in the slot on the back of the mold body. The atomized water is sprayed into the slot with a high temperature, and the atomized water is quickly vaporized, and more heat can be absorbed through the outer fins in a short time to cool the mold body. A plurality of fans are installed at the bottom of the slot. While spraying water mist, the fans are started to blow upward, and the generated air flow cooperation with the high temperature environment can make the water mist vaporize faster and absorb heat. The absorbent cotton in the slot will absorb and store a certain amount of water, and can continue to evaporate and absorb heat later. When cooling down through water circulation later, it can still absorb heat.

[0018] The present invention is divided into a left mold and a right mold. The injection plastic is input through an injection pipe and enters the mold cavity through an injection hole for injection molding. The left mold is matched with the positioning pin of the right mold through a positioning groove, so that the two are combined together for injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention 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 those of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a schematic diagram of the left mold of the present invention; Figure 2 is a schematic diagram of the slot of the present invention; Figure 3 is a schematic diagram of the fan of the present invention; Figure 4 is a side view of the left mold of the present invention; Figure 5 is a top view of the mold body of the present invention.

[0021] The labels in the figure are: 1 - mold body, 11 - mold cavity, 111 - injection hole, 112 - injection pipe, 12 - inner cavity, 121 - inner fins, 122 - water inlet pipe, 13 - positioning groove, 2 - back plate, 3 - mounting plate, 4 - slot, 41 - outer fins, 42 - absorbent cotton, 43 - water spray pipe, 431 - spray hole, 44 - fan, 5 - water storage tank, 51 - water supply pipe, 52 - catheter, 53 - drain pipe, 6 - first valve, 7 - second valve. DETAILED DESCRIPTION OF THE INVENTION

[0022] To make the objectives, technical solutions and advantages of the present invention more clear and understandable, the following further elaborates on the present invention in detail with reference to specific embodiments.

[0023] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote 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 position relationships, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0024] As Figures 1 to 5 shown, this embodiment provides an injection mold that can efficiently cool down, which includes a left mold and a right mold. The left mold and the right mold are symmetrically arranged left and right, and both include a mold body 1, a back plate 2 and a mounting plate 3. The mold body 1 is fixed to the front surface of the back plate 2, the mounting plate 3 is arranged at the rear of the back plate 2, a mold cavity 11 is formed on the side of the mold body 1 away from the back plate 2, and an inner cavity 12 is arranged inside the mold body 1. It is characterized in that a plurality of inner fins 121 are uniformly arranged in the inner cavity 12 in the horizontal direction, and the inner fins 121 are parallel to each other; a water inlet pipe 122 communicating with the inside of the inner cavity 12 is connected to the upper side of the mold body 1, and the water inlet pipe 122 is connected to a cooling water source; a conduit 52 communicating with the inside of the inner cavity 12 is connected to the other side of the water inlet pipe 122 on the upper side of the mold body 1, the other end of the conduit 52 is communicated with a water storage mechanism, and a spraying mechanism is connected to cool down the mold body 1. Perforations 32 are installed at the four corners of the surface of the mounting plate 3, and the perforations 32 penetrate both sides of the mounting plate 3. During use, bolts pass through the perforations 32 to fix the mounting plate 3, and finally the installation and fixation of the mold body 1 are realized. By horizontally and uniformly arranging a plurality of inner fins 121 in the inner cavity 12 of the mold body 1, cooling water enters the inner cavity 12 through the water inlet pipe 11, and the cooling water flows in the inner cavity 12 to cool down the mold body 1. When the cooling water flows through, it has a larger contact surface with the inner fins 121, obtaining a larger heat exchange area, so as to better absorb heat, cool down the mold body 1, and thus enable the injection molded part to be cooled and formed; the inner cavity 12 communicates with the conduit 52 to discharge the cooling water from the conduit 52 to the water storage mechanism, and the water storage mechanism is connected to the spraying mechanism to further cool down the mold.

[0025] The water storage mechanism includes a water storage tank 5, which is fixed between the back plate 2 and the mounting plate 3. The other end of the conduit 52 communicates with the upper interior of the water storage tank 5. A drain pipe 53 communicating with its interior is also connected to the upper side of the water storage tank 5. The water storage tank 5 is connected to a spraying mechanism to cool the mold body 1. First valves 6 are installed on the water inlet pipe 122, the conduit 52, and the drain pipe 53. The spraying mechanism includes a slot 4 opened on the surface of the back of the mold body 1 close to the back plate 2. A plurality of outer fins 41 are vertically and evenly fixed in the slot 4. The outer fins 41 are parallel to each other. A plurality of spray pipes 43 are vertically fixed on the surface of the back plate 2 on the side of the slot 4. The spray pipes 43 are parallel to each other and also parallel to the outer fins 41. A plurality of spray holes 431 facing the outer fins 41 are evenly arranged on the surface of the spray pipes 43. A water supply pipe 51 communicating with its interior is connected to the lower side of the water storage tank 5. The water supply pipe 51 penetrates into the interior of the slot 4 and is placed below the spray pipes 43, and the bottom of the spray pipes 43 is communicated with the water supply pipe 51. A pressure pipe 54 is also connected to the upper part of the water storage tank 5. The pressure pipe 54 is connected to a high-pressure gas source pipeline. Second valves 7 are installed on both the pressure pipe 54 and the water supply pipe 51. A plurality of fans 44 are installed at the bottom of the slot 4. In order to adapt to the high humidity and high temperature conditions existing at the slot 4, the fans preferably select fans 44 with waterproof and heat-resistant functions, which can adapt to extreme working environments, and the blowing direction of the waterproof and heat-resistant fans is upward. While spraying water mist, the fans are started to blow upward, and the airflow generated can cooperate with the high-temperature environment to make the water mist vaporize faster and absorb heat. A water-absorbing cotton 42 is fixedly attached to the surface of the mold body 1 in the slot 4. The outer fins 41 penetrate through the water-absorbing cotton 42. When the second valve 7 is closed and the water mist spraying stops, the water-absorbing cotton 42 will absorb and store a certain amount of water, and then can continue to evaporate and absorb heat. When cooling down through water circulation later, it can still continue to absorb heat. The conduit 52 communicates with the water storage tank 5 of the water storage mechanism to drain the cooling water into the water storage tank 5. The water storage tank 5 drains water through the drain pipe 53. The water storage tank 5 communicates with the spray pipes 43 in the slot 4 through the water supply pipe 51. The water storage tank 5 is pressurized through the pressure pipe 54, so that the spray holes 431 of the spray pipes 43 spray water onto the outer fins 41. The outer fins 41 are located in the slot 4 on the back of the mold body 1. The atomized water is sprayed into the hot slot 4, and the atomized water is quickly vaporized, and can absorb more heat through the outer fins 41 in a short time to cool the mold body 1. A plurality of fans 44 are installed at the bottom of the slot 4. While spraying water mist, the fans are started to blow upward, and the airflow generated can cooperate with the high-temperature environment to make the water mist vaporize faster and absorb heat. The water-absorbing cotton 42 in the slot 4 will absorb and store a certain amount of water, and then can continue to evaporate and absorb heat. When cooling down through water circulation later, it can still continue to absorb heat.

[0026] The bottom of the mold cavity 11 is provided with an injection hole 111. A connecting injection pipe 112 communicating with the injection hole 111 is connected below the mold body 1, and the injection pipe 112 is communicated to an injection molding machine. Positioning grooves 13 are respectively formed on the four corners of the mold body 1 of the left mold, and positioning pins matching the positioning grooves 13 are arranged on the four corners of the mold body 1 of the right mold. The mold is divided into a left mold and a right mold. The injection molding material is input through the injection pipe 112 and enters the mold cavity through the injection hole 111 for injection molding. The left mold is combined with the right mold through the cooperation of the positioning grooves 13 and the positioning pins of the right mold for injection molding.

[0027] In use, the mounting plate 3, the back plate 2 and the mold body 1 are installed and fixed through the perforations 32 on the surface of the mounting plate 3. The water inlet pipe 122 is connected to the cooling water supply pipeline, the drain pipe 53 is connected to the waste water collection pipe, the pressure pipe 54 is connected to the high-pressure gas source, and the waterproof and heat-resistant fan 44, the first valve 6 and the second valve 7 are all connected to the industrial control computer. The injection pipe 112 is connected to the injection molding machine, and the left and right molds are aligned with each other for cooperative use. During the first injection molding, first control the mold body 1 of the left mold to be aligned with and close to the mold body 1 of the right mold, and at the same time align the mold cavities 11. During this process, positioning is carried out through the positioning pins and positioning grooves 13 of the mold. The injection molding machine injects the molten plastic into the mold cavity 11 through the injection pipe 112. After the injection is completed, simultaneously open the first valve 6 on the water inlet pipe 122, the conduit 52 and the drain pipe 53, so that the cooling water enters the inner cavity 12, flows towards the conduit 52 through the inner fins 121 and cools the entire mold body 1 through the inner fins 121, so that the injection molded part in the mold cavity 11 is cooled and formed. The water passing through the inner cavity 12 then flows into the water storage tank 5 through the conduit 52 for storage, and the excess water will finally be discharged from the drain pipe 53. Then close the first valve 6 on the water inlet pipe 122, the conduit 52 and the drain pipe 53, and the injection molded part can be taken out after the mold is opened; during subsequent injection molding, first control the mold body 1 of the left mold to be aligned with and close to the mold body 1 of the right mold, and at the same time align the mold cavities 11. During this process, positioning is carried out through the positioning pins and positioning grooves 13 of the mold. The injection molding machine injects the molten plastic into the mold cavity 11 through the injection pipe 112. After the injection is completed, first open the second valve 7 on the pressure pipe 54 and the water supply pipe 51, and use the pressurized pressure to press the water stored in the water storage tank 5 into the water supply pipe 51 and supply it to each vertically arranged spray pipe 43, and spray it towards the outer fins 41 from the spray holes 431 on its surface. At the same time, start the waterproof and heat-resistant fan 44 to blow air upwards. Since the atomized water is sprayed onto the high-temperature slotted opening 4, the atomized water is quickly vaporized under the combined action of the air flow, and can absorb more heat through the outer fins 41 in a short time to cool the mold body 1. Then close the second valve 7 on the water supply pipe 51 and the pressure pipe 54. Part of the water will be absorbed and stored in the absorbent cotton 42, and can continue to evaporate for a period of time to absorb heat. At the same time, open the first valve 6 on the water inlet pipe 122, the conduit 52 and the drain pipe 53, so that the cooling water enters the inner cavity 12, flows towards the conduit 52 through the inner fins 121 and cools the entire mold body 1 through the inner fins 121, which can provide a more efficient cooling effect than the first injection molding, so that the injection molded part in the mold cavity 11 is cooled and formed. The water passing through the inner cavity 12 then flows into the water storage tank 5 through the conduit 52 for storage, and the excess water will finally be discharged from the drain pipe 53. Then close the first valve 6 on the water inlet pipe 122, the conduit 52 and the drain pipe 53, and the injection molded part can be taken out after the mold is opened.

[0028] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept 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, which are not provided in detail for the sake of brevity. Any omission, modification, equivalent replacement, 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 injection mold capable of efficiently cooling down, comprising a left mold and a right mold, the left mold and the right mold are symmetrically arranged left and right, and both of them include a mold body (1), a back plate (2) and a mounting plate (3). The mold body (1) is fixed on the front surface of the back plate (2), the mounting plate (3) is arranged at the back end of the back plate (2), a mold cavity (11) is formed on the side of the mold body (1) away from the back plate (2), and an inner cavity (12) is arranged inside the mold body (1), characterized in that, Inside the inner cavity (12), a plurality of inner fins (121) are uniformly arranged in the transverse direction, and the inner fins (121) are parallel to each other; an inlet water pipe (122) communicating with the inside of the inner cavity (12) is connected to the upper side of the mold body (1), and the inlet water pipe (122) is connected to a cooling water source; a conduit (52) communicating with the inside of the inner cavity (12) is connected to the upper side of the mold body (1) on the other side of the inlet water pipe (122), and the other end of the conduit (52) communicates with a water storage mechanism, and a spraying mechanism is connected to cool the mold body (1).

2. The injection mold capable of efficiently cooling according to claim 1, wherein The water storage mechanism includes a water storage tank (5), the water storage tank (5) is fixed between the back plate (2) and the mounting plate (3), the other end of the conduit (52) communicates with the upper inner part of the water storage tank (5), and a drain pipe (53) communicating with its inside is also connected to the upper side of the water storage tank (5); the water storage tank (5) is connected to a spraying mechanism to cool the mold body (1).

3. The injection mold capable of efficiently cooling according to claim 2, characterized in that, First valves (6) are installed on the inlet water pipe (122), the conduit (52) and the drain pipe (53).

4. The injection mold capable of efficiently cooling according to claim 3, characterized in that, The spraying mechanism includes a slot (4) opened on the surface of the back of the mold body (1) close to the back plate (2), a plurality of outer fins (41) are vertically and uniformly fixed in the slot (4), the outer fins (41) are parallel to each other, and a plurality of spray pipes (43) are vertically fixed on the surface of the back plate (2) on the side of the slot (4), the spray pipes (43) are parallel to each other, the spray pipes (43) are also parallel to the outer fins (41), and a plurality of spray holes (431) facing the outer fins (41) are uniformly arranged on the surface of the spray pipes (43); a water supply pipe (51) communicating with its inside is connected to the lower side of the water storage tank (5), the water supply pipe (51) penetrates into the inside of the slot (4) and is placed below the spray pipes (43), and the bottom of the spray pipes (43) is communicated with the water supply pipe (51).

5. The injection mold capable of efficiently cooling according to claim 4, characterized in that, A pressure pipe (54) is also connected to the upper side of the water storage tank (5), and the pressure pipe (54) is connected to a high-pressure gas source pipeline.

6. The injection mold capable of efficiently cooling according to claim 5, wherein Second valves (7) are installed on the pressure pipe (54) and the water supply pipe (51).

7. The injection mold capable of efficiently cooling according to claim 4, characterized in that, A plurality of fans (44) are installed at the bottom of the slot (4).

8. The injection mold capable of efficiently cooling according to claim 4, wherein A water absorbent cotton (42) is fixedly attached to the surface of the mold body 1 in the slot (4), and the outer fins (41) penetrate through the water absorbent cotton (42).

9. The injection mold capable of efficiently cooling according to claim 1, wherein, An injection hole (111) is provided at the bottom of the mold cavity (11), an injection pipe (112) communicating with the injection hole (111) is connected to the lower part of the mold body (1), and the injection pipe (112) is communicated with an injection molding machine.

10. The injection mold capable of efficiently cooling according to claim 1, characterized in that, Positioning grooves (13) are opened on the surfaces of the four corners of the mold body (1) of the left mold, and positioning pins matching the positioning grooves (13) are arranged on the surfaces of the four corners of the mold body (1) of the right mold.

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