Injection mold with cooling assembly

Abstract

The application discloses an injection mold with a cooling assembly, comprising a fixed mold body, a movable mold body, a cooling assembly, a ferromagnetic bottom plate and an electromagnet, and can realize cooling treatment of the mold after injection molding by the fixed mold body and the movable mold body, detect local high-temperature places of the finished product by the cooling assembly, and make the heat-absorbing block move and tightly adhere to the heat-conducting inner liner and absorb the heat of the high-temperature part of the finished product under the action of the high temperature, so that the heat absorbed by the heat-absorbing block is taken away by the flow of the cooling liquid in the return hose, and the effect of cooling is achieved. Through the high-temperature detection of the injection product by the cooling assembly, the local high temperature can be cooled, and the cooling is beneficial to subsequent demolding, so that the damage and deformation of demolding are greatly reduced, the cost caused by the damage is reduced, and the working efficiency of injection molding is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and more specifically, to an injection mold having a cooling component. Background Technology

[0002] Injection molds are tools used to produce plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used for the mass production of certain complex-shaped parts. Specifically, it refers to injecting molten plastic into the mold cavity under high pressure by an injection molding machine, and after cooling and solidification, obtaining the molded product. An injection mold consists of two parts: a moving mold and a fixed mold. The moving mold is installed on the moving platen of the injection molding machine, and the fixed mold is installed on the fixed platen of the injection molding machine. During injection molding, the moving mold and the fixed mold close to form the gating system and the cavity. When the mold is opened, the moving mold and the fixed mold separate to remove the plastic product. In order to reduce the heavy workload of mold design and manufacturing, most injection molds use standard mold bases.

[0003] Injection molds mainly consist of a gating system, a temperature control system, molding parts, and structural parts. For injection molds used in thermoplastics, the temperature control system primarily involves designing a cooling system to cool the mold. A common method for mold cooling is to create cooling water channels within the mold, using circulating cooling water to remove heat from the mold. Heating of the mold is achieved using hot water or steam through these cooling water channels.

[0004] However, currently, existing injection molds still exhibit localized insufficient cooling during the cooling process of the molded finished product. Consequently, some areas of the finished product remain in a softened state due to high temperatures during demolding, making them prone to damage or deformation. This results in substandard finished products, necessitating re-injection, cooling, and demolding. This not only significantly increases costs but also reduces injection time, leading to low injection molding efficiency.

[0005] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide an injection mold with a cooling component. Summary of the Invention

[0006] The purpose of this invention is to provide an injection mold with a cooling component to solve the above-mentioned problems.

[0007] To achieve the above objectives, an embodiment of the present invention provides the following technical solution:

[0008] An injection mold with a cooling assembly includes a fixed mold body, a moving mold body, a cooling assembly, a ferromagnetic base plate, and an electromagnet. The fixed mold body has positioning grooves on all four sides of its upper end. The moving mold body is located above the fixed mold body. Positioning pins are fixedly connected to all four sides of the moving mold body near the fixed mold body, and the positioning pins match the positioning grooves. An injection cavity is formed between the fixed mold body and the moving mold body. An injection hole is provided on the upper end of the moving mold body, and the injection hole is connected to the injection cavity.

[0009] A cooling groove is provided in the fixed mold body. The cooling component is slidably connected in the cooling groove. The cooling component includes a heat-conducting component, which is slidably connected in the cooling groove. A heat-absorbing component is fixedly connected to the upper end of the heat-conducting component. A plurality of return holes are provided in the middle of the fixed mold body. A return hose is fixedly connected in the return hole and is located between the heat-conducting component and the heat-absorbing component. Coolant is provided in the return hose.

[0010] The ferromagnetic base plate is fixedly connected to the lower end of the cooling assembly, and the ferromagnetic base plate is slidably connected to the cooling tank. The electromagnet is fixedly connected to the inner wall of the injection molding cavity.

[0011] As a further improvement of the present invention, the heat-conducting component includes a base plate, which is slidably connected to a cooling groove. A plurality of heat-conducting grooves are formed in the middle of the base plate, and expansion balls are provided in the heat-conducting grooves.

[0012] As a further improvement of the present invention, the base plate is made of a thermally conductive material and the expansion ball is made of a heat-absorbing material.

[0013] As a further improvement of the present invention, the heat-absorbing component includes a mounting frame, which is fixedly connected to the upper end of the heat-conducting component. A plurality of heat-absorbing blocks are provided in the middle of the mounting frame, and the plurality of heat-absorbing blocks are connected to each other by heat-conducting connecting ropes. The heat-conducting connecting ropes around the perimeter are fixedly connected to the inner wall of the mounting frame, and heat-absorbing balls are fixedly connected inside the heat-conducting connecting ropes.

[0014] As a further improvement of the present invention, the mounting frame is made of a high-temperature resistant material, the heat-absorbing block is made of a material with a high thermal conductivity coefficient, the heat-conducting connecting rope is made of a high-toughness, high-temperature resistant material, and the heat-absorbing ball is made of graphene material.

[0015] As a further improvement of the present invention, the expansion ball includes an expansion bladder, the expansion bladder is disposed in a heat-conducting groove, a plurality of heat-conducting wires are passed through the middle of the expansion bladder, the outer end of the expansion bladder is wrapped with a heat-absorbing outer shell, the inner end of the expansion bladder is provided with a heat-conducting inner shell, and the heat-conducting inner shell is filled with a thermal expansion body.

[0016] As a further improvement of the present invention, the expansion bladder, the heat-absorbing outer shell and the heat-conducting inner shell are all made of high-toughness thermal expansion material.

[0017] As a further improvement of the present invention, the fixed mold body is provided with multiple demolding grooves, and the demolding grooves are connected to the injection cavity. The demolding hole is slidably connected with ejector pins, and the multiple ejector pins pass through the cooling assembly and are distributed between the multiple heat-absorbing blocks.

[0018] As a further improvement of the present invention, a pair of heat-conducting inner liner is fixedly connected inside the injection molding cavity, and the ejector pin penetrates through the heat-conducting inner liner.

[0019] As a further improvement of the present invention, the thermal expansion body is one of rigid PVC, polyvinylidene chloride, and vinyl acetate copolymer.

[0020] Compared with the prior art, the advantages of this invention are:

[0021] This solution enables cooling after injection molding using both the fixed and moving mold bodies. A cooling assembly detects areas of localized high temperature in the finished product. Under this high temperature, the expansion ball expands and compresses the heat-absorbing block, causing it to move and adhere to the heat-conducting inner liner, absorbing the heat from the high-temperature portion of the finished product. The heat absorbed by the heat-absorbing block is then carried away by the flow of coolant in the return hose, achieving a cooling effect. This high-temperature detection by the cooling assembly not only cools localized high temperatures but also facilitates subsequent demolding, significantly reducing demolding damage and deformation, lowering costs associated with such damage, and effectively improving injection molding efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall exploded structure of the present invention;

[0023] Figure 2 This is a front cross-sectional view of the present invention;

[0024] Figure 3 This is a front cross-sectional view of the cooling assembly of the present invention;

[0025] Figure 4 This is a top view cross-sectional structural diagram of the heat-conducting component of the present invention;

[0026] Figure 5 This is a top view cross-sectional structural diagram of the heat-absorbing element of the present invention;

[0027] Figure 6 This is a front cross-sectional view of the expansion sphere structure of the present invention.

[0028] Explanation of the labels in the diagram:

[0029] 1. Fixed mold body; 2. Moving mold body; 3. Positioning pin; 4. Positioning groove; 5. Injection hole; 6. Heat-conducting inner liner; 7. Cooling tank; 8. Cooling assembly; 81. Heat-conducting component; 811. Base plate; 812. Heat-conducting groove; 813. Expansion ball; 8131. Expansion bladder; 8132. Heat-conducting wire; 8133. Heat-absorbing outer shell; 8134. Heat-conducting inner shell; 8135. Thermal expansion body; 82. Heat-absorbing component; 821. Mounting frame; 822. Heat-absorbing block; 823. Heat-conducting connecting rope; 824. Heat-absorbing ball; 83. Return hose; 9. Ferromagnetic base plate; 10. Electromagnet; 11. Ejector pin; 12. Return hole. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] Example 1:

[0032] Please see Figure 1 and Figure 2 An injection mold with a cooling assembly includes a fixed mold body 1, a moving mold body 2, a cooling assembly 8, a ferromagnetic base plate 9, and an electromagnet 10. Positioning grooves 4 are formed around the upper circumference of the fixed mold body 1. The moving mold body 2 is positioned above the fixed mold body 1. Positioning pins 3 are fixedly connected to the circumference of the moving mold body 2 near the fixed mold body 1, and the positioning pins 3 match the positioning grooves 4. The engagement of the positioning pins 3 and positioning grooves 4 not only provides guidance but also prevents the fixed mold body 1 and moving mold body 2 from shifting during injection molding, thus preventing mold deformation. An injection cavity is formed between the fixed mold body 1 and the moving mold body 2. An injection hole is formed at the upper end of the moving mold body 2. 5. The injection hole 5 is connected to the injection cavity. Material is injected through the injection hole 5 and formed into a finished product in the injection cavity. This process is existing technology and can be used by those skilled in the art. This specification will not elaborate on it. Furthermore, the mold body 1 and the moving mold body 2 are cooled after injection molding using existing cooling technology. Subsequently, the cooling component 8 is used to detect areas of local high temperature in the finished product. The high temperature detection of the injection molded product by the cooling component 8 can cool down the local high temperature. At the same time, the cooling facilitates subsequent demolding, thereby greatly reducing demolding damage and deformation, reducing the cost caused by damage, and effectively improving the efficiency of injection molding.

[0033] Please see Figure 2 and Figure 3A cooling tank 7 is provided inside the fixed mold body 1. A cooling component 8 is slidably connected to the cooling tank 7. The cooling component 8 is located at the bottom of the cooling tank 7 to prevent it from being affected by the temperature of the uncooled finished product. The cooling component 8 includes a heat-conducting element 81, which is slidably connected to the cooling tank 7. A heat-absorbing element 82 is fixedly connected to the upper end of the heat-conducting element 81. A plurality of return holes 12 are provided in the middle of the fixed mold body 1. A return hose 83 is fixedly connected to the return hole 12 and is located between the heat-conducting element 81 and the heat-absorbing element 82. Coolant is provided in the return hose 83. After being heated by the heat-conducting element 81, it reacts with the heat-absorbing element 82. The heat-absorbing element 82 is used to detect the temperature of the finished product in the mold. At the same time, the coolant flowing in the return hose 83 cools down the high-temperature part.

[0034] Please see Figure 4 The heat-conducting component 81 includes a base plate 811, which is slidably connected to the cooling tank 7. Multiple heat-conducting grooves 812 are provided in the middle of the base plate 811, and expansion balls 813 are provided in the heat-conducting grooves 812. The heat absorbed by the base plate 811 is conducted to the expansion balls 813, so that the multiple expansion balls 813 at the corresponding locations are heated and expanded.

[0035] The base plate 811 is made of a thermally conductive material, such as graphene composite material. The expansion ball 813 is made of a heat-absorbing material, such as expanded polystyrene. The base plate 811 conducts heat to the expansion ball 813, and the expansion ball 813 absorbs the heat by utilizing its own heat-absorbing properties, thereby making itself more fully heated and achieving a better expansion effect.

[0036] Please see Figure 5 The heat-absorbing component 82 includes a mounting frame 821, which is fixedly connected to the upper end of the heat-conducting component 81. Multiple heat-absorbing blocks 822 are located in the middle of the mounting frame 821. These blocks are connected by heat-conducting connecting ropes 823, and the surrounding heat-conducting connecting ropes 823 are fixedly connected to the inner wall of the mounting frame 821. Heat-absorbing balls 824 are fixedly connected within the heat-conducting connecting ropes 823. After expansion by the expansion balls 813, the heat-absorbing blocks 822 are compressed and moved to fit tightly against the heat-conducting inner liner 6, absorbing heat from the locally high-temperature areas within the heat-conducting inner liner 6, thereby achieving a cooling effect. Simultaneously, the heat-conducting connecting ropes 823 can transfer the temperature of the saturated heat-absorbing balls 824 to the remaining unabsorbed heat-absorbing balls 824, providing auxiliary cooling and further improving the cooling effect.

[0037] The mounting frame 821 is made of high-temperature resistant material, the heat-absorbing block 822 is made of a material with high thermal conductivity, such as boron nitride, the heat-conducting connecting rope 823 is made of high-toughness, high-temperature resistant material, such as high-temperature nylon, and the heat-absorbing ball 824 is made of graphene. The high-temperature resistance of the mounting frame 821 can prevent it from being damaged by excessive heat, while the heat-absorbing block 822 can effectively absorb and conduct heat to the heat-absorbing ball 824 using a material with high thermal conductivity. At the same time, the graphene can play a good role in heat absorption, heat conduction, and heat dissipation.

[0038] Please see Figure 6 The expansion ball 813 includes an expansion bladder 8131, which is located inside a heat-conducting groove 812. Multiple heat-conducting wires 8132 pass through the middle of the expansion bladder 8131. The outer end of the expansion bladder 8131 is wrapped with a heat-absorbing outer shell 8133, and the inner end of the expansion bladder 8131 is provided with a heat-conducting inner shell 8134. The heat-conducting inner shell 8134 is filled with a thermal expansion body 8135. The heat-absorbing outer shell 8133 absorbs external heat and transfers the heat to the heat-conducting inner shell 8134 through the heat-conducting wires 8132. The heat is then conducted to the thermal expansion body 8135 by the heat-conducting inner shell 8134, causing the thermal expansion body 8135 to deform after being heated. This causes the expansion ball 813 to expand and compress the heat-absorbing block 822.

[0039] The expansion bladder 8131, the heat-absorbing outer shell 8133, and the heat-conducting inner shell 8134 are all made of high-toughness thermal expansion material. The high-toughness thermal expansion material not only makes the expansion bladder 8131, the heat-absorbing outer shell 8133, and the heat-conducting inner shell 8134 less likely to melt at high temperatures, but also makes the expansion ball 813 less likely to break when heated and expanded.

[0040] The thermal expansion body 8135 is made of one of rigid PVC, polyvinylidene chloride, and vinyl acetate copolymer. By selecting the thermal expansion material, the expansion ball 813 can have a better thermal expansion effect.

[0041] Please continue reading. Figure 2 The ferromagnetic base plate 9 is fixedly connected to the lower end of the cooling assembly 8, and the ferromagnetic base plate 9 is slidably connected to the cooling tank 7. The electromagnet 10 is fixedly connected to the inner wall of the injection cavity. The magnetic force of the electromagnet 10 attracts the ferromagnetic base plate 9, thereby causing the ferromagnetic base plate 9 to move the cooling assembly 8 upward and close to the finished product, so as to inspect the finished product and cool down the local high temperature area of ​​the finished product.

[0042] Please continue reading. Figure 1The fixed mold body 1 has multiple demolding grooves, which are connected to the injection cavity. Ejector pins 11 are slidably connected in the demolding hole, and multiple ejector pins 11 pass through the cooling component 8 and are distributed between multiple heat absorption blocks 822. The cooled finished product is ejected by the ejector pins 11, thereby completing the demolding process. Here, the ejector pins 11 use existing technology for demolding, and those skilled in the art can select them. This specification will not elaborate further.

[0043] A pair of heat-conducting inner liner 6 are fixedly connected inside the injection cavity, and the ejector pin 11 penetrates through the heat-conducting inner liner 6. The temperature of the finished product is conducted to its outer end through the heat-conducting inner liner 6. The cooling component 8 is used to detect local high temperature and cool it down.

[0044] Working Principle: In this invention, when the moving mold body 2 and the fixed mold body 1 are bonded together, multiple positioning pins 3 and positioning grooves 4 engage. This effectively prevents misalignment between the fixed mold body 1 and the moving mold body 2 when material is injected through the injection hole 5. After the product is formed, existing cooling technology is still used to cool the finished product. Then, the electromagnet 10 is powered on, causing it to become magnetic and attract the ferromagnetic base plate 9. Driven by the ferromagnetic base plate 9, the cooling component 8 is brought closer to the finished product. The cooling component 8 is then used to inspect the finished product. If any uncooled portions are found, the expansion balls 813 in the middle of the base plate 811, which are in contrast to the high-temperature portion of the finished product, will heat up and expand. The expansion balls 813 then expand... The heat-absorbing blocks 822 are squeezed so that multiple heat-absorbing blocks 822 are tightly attached to the surface of the heat-conducting inner liner 6, transferring heat to the high-temperature part of the finished product. Then, the heat-absorbing balls 824 absorb the heat, thereby achieving the purpose of cooling the high-temperature part of the finished product. When the heat-absorbing balls 824 are saturated with heat, the coolant in the return hose 83 absorbs and carries away the heat. Here, the coolant can be replaced with cooling water or cooling oil depending on the cost. Cooling water has a higher cost performance, but it is easy to generate water vapor during use, which may affect the injection molded product. Cooling oil has a poor cooling effect. It is selected according to the user's needs. After local cooling, the electromagnet 10 is controlled to repel the ferromagnetic base plate 9, so that the cooling component 8 returns to its original position.

[0045] As can be seen from the above technical solutions, the present invention has the following beneficial effects:

[0046] This solution enables the cooling of the molded product after injection molding via the fixed mold body 1 and the moving mold body 2. The cooling component 8 then detects areas of localized high temperature in the finished product. Under the influence of this high temperature, the expansion ball 813 expands and compresses the heat-absorbing block 822, causing it to move and adhere tightly to the heat-conducting inner liner 6, absorbing the heat from the high-temperature portion of the finished product. The heat absorbed by the heat-absorbing block 822 is then carried away by the flow of coolant in the return hose 83, achieving a cooling effect. The high-temperature detection of the injection-molded product by the cooling component 8 not only cools localized high temperatures but also facilitates subsequent demolding, significantly reducing demolding damage and deformation, lowering costs associated with such damage, and effectively improving injection molding efficiency.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An injection mold with a cooling assembly, characterized in that: include: The fixed mold body (1) has positioning grooves (4) on all four sides of its upper end. The moving mold body (2) is located above the fixed mold body (1). The moving mold body (2) is fixedly connected with positioning posts (3) around one end of the moving mold body (2) near the fixed mold body (1), and the positioning posts (3) match the positioning grooves (4). An injection cavity is formed between the fixed mold body (1) and the moving mold body (2). An injection hole (5) is provided at the upper end of the moving mold body (2), and the injection hole (5) is connected to the injection cavity. A pair of heat-conducting inner liner (6) is fixedly connected inside the injection cavity. Cooling component (8), the fixed mold body (1) has a cooling groove (7) inside, the cooling component (8) is slidably connected in the cooling groove (7), the cooling component (8) includes a heat-conducting component (81), the heat-conducting component (81) is slidably connected in the cooling groove (7), and a heat-absorbing component (82) is fixedly connected to the upper end of the heat-conducting component (81). The fixed mold body (1) has multiple reflux holes (12) in the middle. A reflux hose (83) is fixedly connected in the reflux hole (12). The reflux hose (83) is located between the heat conduction component (81) and the heat absorption component (82). Coolant is provided in the reflux hose (83). Ferromagnetic base plate (9), which is fixedly connected to the lower end of the cooling assembly (8) and slidably connected to the cooling tank (7); An electromagnet (10) is located inside the injection molding cavity, and the electromagnet (10) is fixedly connected to the inner wall of the injection molding cavity; The heat-conducting component (81) includes a base plate (811), which is slidably connected to the cooling groove (7). The base plate (811) has multiple heat-conducting grooves (812) in the middle, and expansion balls (813) are provided in the heat-conducting grooves (812). The heat-absorbing component (82) includes a mounting frame (821), which is fixedly connected to the upper end of the heat-conducting component (81). The mounting frame (821) has multiple heat-absorbing blocks (822) in the middle. Under the action of high temperature, the expansion ball (813) expands and squeezes the heat-absorbing block (822), thereby causing the heat-absorbing block (822) to move and stick tightly to the heat-conducting inner liner (6) and absorb the heat of the high-temperature part of the finished product.

2. The injection mold with a cooling assembly according to claim 1, characterized in that: The base plate (811) is made of a thermally conductive material, and the expansion ball (813) is made of a heat-absorbing material.

3. The injection mold with a cooling assembly according to claim 1, characterized in that: Multiple heat-absorbing blocks (822) are connected by heat-conducting connecting ropes (823), and the heat-conducting connecting ropes (823) around the perimeter are fixedly connected to the inner wall of the mounting frame (821). Heat-absorbing balls (824) are fixedly connected inside the heat-conducting connecting ropes (823).

4. An injection mold with a cooling assembly according to claim 3, characterized in that: The mounting frame (821) is made of high-temperature resistant material, the heat-absorbing block (822) is made of a material with high thermal conductivity, the heat-conducting connecting rope (823) is made of high-toughness high-temperature resistant material, and the heat-absorbing ball (824) is made of graphene material.

5. An injection mold with a cooling assembly according to claim 1, characterized in that: The expansion ball (813) includes an expansion bladder (8131), which is located inside a heat-conducting groove (812). Multiple heat-conducting wires (8132) pass through the middle of the expansion bladder (8131). The outer end of the expansion bladder (8131) is wrapped with a heat-absorbing outer shell (8133), and the inner end of the expansion bladder (8131) is provided with a heat-conducting inner shell (8134). The heat-conducting inner shell (8134) is filled with a thermal expansion body (8135).

6. An injection mold with a cooling assembly according to claim 5, characterized in that: The expansion bladder (8131), the heat-absorbing outer shell (8133), and the heat-conducting inner shell (8134) are all made of high-toughness thermal expansion material.

7. An injection mold with a cooling assembly according to claim 1, characterized in that: The fixed mold body (1) has multiple demolding grooves, and the demolding grooves are connected to the injection cavity. The demolding grooves are slidably connected with ejector pins (11), and the multiple ejector pins (11) pass through the cooling assembly (8) and are distributed between multiple heat absorption blocks (822).

8. An injection mold with a cooling assembly according to claim 1, characterized in that: The pin (11) penetrates the heat-conducting inner liner (6).

9. An injection mold with a cooling assembly according to claim 5, characterized in that: The thermal expansion body (8135) is made of one of rigid PVC, polyvinylidene chloride, or vinyl acetate copolymer.

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