A cooling device for injection mold

Abstract

The utility model provides a cooling device for an injection mold, comprising a bottom mold and a top mold, wherein the top mold and the bottom mold surround a molding cavity when the mold is closed, and is characterized in that: a liquid cavity is arranged in the top mold and the bottom mold, and the liquid cavity corresponds to the surface geometry of the molding cavity; a heat exchange flow channel is arranged on the side of the liquid cavity close to the molding cavity, and the heat exchange flow channel is connected with the liquid cavity; a liquid exchange port for communicating with the outside is arranged on the liquid cavity, and a condensing device for circulating a cooling medium into the liquid cavity is connected to the liquid exchange port; an injection channel for injecting raw materials into the molding cavity is arranged on the top mold; a threaded groove is arranged at the liquid exchange port; the utility model can solve the problem in the prior art that the cooling component has a small transfer area and a slow heat transfer efficiency during heat conduction, thereby reducing the cooling effect.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a cooling device for injection molds. Background Art

[0002] Injection molds are tools for producing plastic products. They inject the heated and molten plastic into the mold cavity under high pressure by an injection molding machine, and obtain the molded product after cooling and solidification. Injection molding production has the advantages of fast speed, high efficiency and simple operation.

[0003] In order to speed up the molding speed of the injection molded product, a cooling device needs to be arranged in the injection mold to cool the injection molded product; for example, the utility model disclosed in the publication number CN220720143U discloses an exhaustable high-sealing injection mold (hereinafter referred to as: prior art 1) comprising a bottom plate, two support blocks are welded on the top surface of the bottom plate, a bottom mold is bolted together on the top surfaces of the two support blocks, both side walls of the bottom plate are welded with an inverted L-shaped support plate, a first hydraulic pump is bolted to the bottom surfaces of the two support plates, a first hydraulic rod is fixedly connected to the output end of the first hydraulic pump, a top mold is bolted together on the bottom surfaces of the two first hydraulic rods, an injection pipe is fixedly connected to the top mold, two exhaust mechanisms are arranged on the top surface of the top mold, a demolding mechanism is arranged above the bottom mold, and cooling components are arranged on the side walls of the top mold and the bottom mold.

[0004] Although the cooling of the injection molded product is achieved in the prior art 1 by setting a cooling component on the side of the top mold and the bottom mold; however, the cooling component in the prior art 1 has a small transfer area and a slow heat transfer efficiency during heat conduction, and heat is only transferred through the contact surface between the condenser and the injection molded product, which will cause the cooling component to be unable to uniformly cool the injection molded product, thereby reducing the cooling effect. Utility Model Content

[0005] The utility model aims to provide a cooling device for injection molds, which can solve the problem in the prior art that the cooling assembly has a small transfer area and a slow heat transfer efficiency during heat conduction, thereby reducing the cooling effect.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A cooling device for an injection mold, comprising a bottom mold and a top mold, wherein the top mold and the bottom mold surround a molding cavity when the mold is closed, characterized in that: a liquid cavity is provided in each of the top mold and the bottom mold, and the liquid cavity corresponds to the surface geometry of the molding cavity;

[0008] A heat exchange channel is arranged on one side of the liquid cavity close to the mold cavity, and the heat exchange channel is connected to the liquid cavity; a liquid exchange port for connecting with the outside is arranged on the liquid cavity, and the liquid exchange port is connected to a condensing device for circulating a cooling medium into the liquid cavity.

[0009] The top mold is provided with an injection channel for injecting raw materials into the mold cavity.

[0010] Preferably, a threaded groove is provided at the fluid exchange port.

[0011] Preferably, both the top mold and the bottom mold are provided with positioning holes, and positioning blocks are detachably installed in the positioning holes.

[0012] Preferably, the positioning block is detachably mounted in the positioning hole by means of bolts.

[0013] Preferably, connecting grooves are provided on the top mold and the bottom mold.

[0014] Preferably, a collecting hopper is detachably mounted at the feed inlet of the injection channel.

[0015] Preferably, a stripper rod is slidably mounted on the bottom mold, and one end of the stripper rod away from the cavity is fixedly connected to a push plate.

[0016] Preferably, a guide rod is fixedly connected to the bottom mold, and the push plate is slidably mounted on the guide rod.

[0017] Preferably, a spring is fixedly connected to the bottom mold, and one end of the spring away from the bottom mold is fixedly connected to the push plate.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] In this embodiment, the liquid exchange port includes a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively connected to the liquid inlet pipe and the liquid outlet pipe provided on the condensing device, so that the condensing device can circulate the cooling medium into the liquid cavity; the feed end of the injection channel is used to be connected to the injection device, and the injection device injects the melted raw material into the cavity through the injection channel; after the injection device injects the raw material into the cavity, in order to speed up the molding speed of the injection molded product, the cooling medium is injected into the liquid cavity through the condensing device so that the cooling medium cools the injection molded product formed in the cavity;

[0020] By arranging the surface geometric shapes of the liquid cavity and the mold cavity correspondingly, the heat exchange area between the cooling medium entering the liquid cavity and the mold cavity can be increased, thereby improving the cooling effect; by arranging a heat exchange flow channel on the side of the liquid cavity close to the mold cavity, the contact area between the top mold and the bottom mold arranged between the liquid cavity and the mold cavity and the cooling medium can be further increased, thereby further improving the cooling effect and achieving uniform cooling of the injection molded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a three-dimensional diagram of the utility model.

[0023] Figure 2 It is a structural schematic diagram of the utility model.

[0024] Figure 3 For this utility model Figure 2 A partial enlarged view of point A in the middle.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 101-bottom mold, 102-top mold, 103-cavity, 104-liquid cavity, 105-spring, 106-heat exchange channel, 107-liquid exchange port, 108-injection channel, 109-liquid outlet, 110-positioning block, 111-positioning hole, 112-connecting groove, 113-collecting hopper, 114-stripping rod, 115-push plate, 116-guide rod. DETAILED DESCRIPTION

[0027] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0028] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0031] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0033] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1-Figure 3 This embodiment discloses a cooling device for an injection mold, comprising a bottom mold 101 and a top mold 102, wherein the top mold 102 and the bottom mold 101 surround a molding cavity 103 when the molds are closed, and a liquid cavity 104 is provided in each of the top mold 102 and the bottom mold 101, and the liquid cavity 104 corresponds to the surface geometry of the molding cavity 103;

[0035] A heat exchange channel 106 communicating with the liquid cavity 104 is disposed on one side of the liquid cavity 104 close to the mold cavity 103 ; a liquid exchange port 107 communicating with the outside is disposed on the liquid cavity 104 , and the liquid exchange port 107 is connected to a condensing device for circulating a cooling medium into the liquid cavity 104 .

[0036] The top mold 102 is provided with an injection channel 108 for injecting raw materials into the mold cavity 103 .

[0037] In the present embodiment, the liquid exchange port 107 includes a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively connected to the liquid inlet pipe and the liquid outlet pipe provided on the condensing device, so that the condensing device can circulate the cooling medium into the liquid cavity; the feed end of the injection channel 108 is used to be connected to the injection device, and the injection device injects the melted raw material into the cavity 103 through the injection channel 108; after the injection device injects the raw material into the cavity 103, in order to speed up the molding speed of the injection molded product, the cooling medium is injected into the liquid cavity 104 through the condensing device so that the cooling medium cools the injection molded product formed in the cavity 103; in the present embodiment In the example, the liquid cavity 104 is arranged corresponding to the surface geometric shape of the cavity 103, so that the heat exchange area between the cooling medium entering the liquid cavity 104 and the cavity 103 is increased, thereby achieving uniform cooling of the cavity 103 and improving the cooling effect of the injection molded product; by arranging a heat exchange channel 106 on the side of the liquid cavity 104 close to the cavity 103, the contact area between the top mold 102 and the bottom mold 101 and the cooling medium can be further increased, thereby further improving the cooling effect and achieving uniform cooling of the injection molded product; in this embodiment, the injection device and the condensation device are both conventional devices in the prior art, and their structures and functions are not explained one by one here.

[0038] In some embodiments, a thread groove is provided at the liquid exchange port 107. The thread groove is provided at the liquid inlet and the liquid outlet, and the liquid inlet pipe and the liquid outlet pipe connected to the condensing device are detachably connected to the liquid inlet pipe and the liquid outlet pipe through the thread groove, respectively, for easy installation and replacement.

[0039] In some embodiments, the top mold 102 and the bottom mold 101 are both provided with positioning holes 111, and positioning blocks 110 are detachably installed in the positioning holes 111. When it is necessary to perform injection molding on a large workpiece or a workpiece whose injection material is not easy to cool and needs to be kept for a long time, after the top mold 102 is installed on the bottom mold 101, the positioning blocks 110 installed in the positioning holes 111 can fix and limit the top mold 102 and the bottom mold 101, thereby preventing the top mold 102 and the bottom mold 101 from being displaced during the injection device into the cavity 103 or the subsequent static process, resulting in deformation of the injection product.

[0040] In some embodiments, the positioning block 110 is detachably mounted in the positioning hole 111 by bolts. By making the positioning block 110 detachably mounted in the positioning hole 111 by bolts, the positioning block 110 can be easily installed and removed.

[0041] In some embodiments, the top mold 102 and the bottom mold 101 are provided with connection grooves 112. The top mold 102 and the bottom mold 101 can be connected to a fixing mechanism or a driving mechanism according to actual conditions through the connection grooves 112, so that the process of closing the top mold 102 and the bottom mold 101 is more stable; the fixing mechanism and the driving mechanism in this embodiment are conventional devices in the prior art, and their principles and functions are not described one by one here.

[0042] In some embodiments, a collecting hopper 113 is detachably mounted at the feed port of the injection channel 108 .

[0043] The collecting hopper 113 is detachably connected via bolts, and the collecting hopper 113 can be easily replaced and cleaned by detachably connecting the collecting hopper 113 to the feed port of the injection channel 108 .

[0044] In some embodiments, a stripper rod 114 is slidably mounted on the bottom mold 101 , and a push plate 115 is fixedly connected to one end of the stripper rod 114 away from the cavity 103 . After the injection molding is completed, the top mold 102 is separated from the bottom mold 101; when the finished injection molded product needs to be removed from the bottom mold 101, the push plate 115 is pressed to make the push plate 115 move vertically upward, and the stripping rod 114 fixedly connected to the push plate 115 moves upward under the drive of the push plate 115 until it contacts the finished injection molded product. After the stripping rod 114 contacts the finished injection molded product, the finished injection molded product is separated from the bottom mold 101 under the action of the stripping rod 114, so that the finished injection molded product can be removed from the bottom mold 101; in this embodiment, there are four stripping rods 114, and the ends of the four stripping rods 114 away from the cavity 103 are fixedly connected to the push plate 115, and the bottom mold 101 is provided with a clearance hole for making way for the stripping rod 114, and the liquid cavity 104 is not connected to the clearance hole.

[0045] In some embodiments, a guide rod 116 is fixedly connected to the bottom mold 101, and the push plate 115 is slidably mounted on the guide rod 116. The guide rod 116 can guide the push plate 115, so that the push plate 115 and the stripper rod 114 connected to the push plate 115 can move more stably.

[0046] In some embodiments, a spring 105 is fixedly connected to the bottom mold 101, and one end of the spring 105 away from the bottom mold 101 is fixedly connected to the push plate 115. When the push plate 115 drives the stripper rod 114 to move upward, the spring 105 of the connected bottom mold 101 and the push plate 115 is compressed. When the stripper rod 114 contacts the injection molded product and drives the injection molded product to separate from the bottom mold 101, the push plate 115 can drive the stripper rod 114 to reset under the action of the spring 105 resisting elastic deformation, and the spring 105 can be set to avoid the stripper rod 114 from moving too fast when the push plate 115 is pressed to drive the stripper rod 114 to move, resulting in the stripper rod 114 causing damage to the injection molded product after collision with the injection molded product; in this embodiment, a telescopic device is connected to the bottom end of the top plate, and the telescopic device is used to drive the top plate to move. The telescopic device described in this embodiment is a commonly used driving device in the prior art, and its structure and principle are not described one by one here.

[0047] In some embodiments, the top mold 102 is provided with an exhaust hole for exhausting the high-temperature and high-pressure gas generated in the cavity 103 to prevent bubbles or other defects on the surface of the injection molded product when the gas in the cavity 103 is difficult to be exhausted in the injection mold.

[0048] In some embodiments, a wavy or curved convex structure is provided on one side of the liquid cavity 104 close to the mold cavity 103. The convex structure can further increase the contact area between the cooling medium and the top mold 102 and the bottom mold 101, thereby further improving the cooling efficiency and cooling effect of the cooling medium on the injection molding material in the mold cavity 103.

[0049] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooling device for an injection mold, comprising a bottom mold (101) and a top mold (102), wherein the top mold (102) and the bottom mold (101) enclose a molding cavity (103) when the molds are closed, characterized in that: The top mold (102) and the bottom mold (101) are both provided with a liquid cavity (104), and the surface geometry of the liquid cavity (104) corresponds to that of the mold cavity (103); A heat exchange channel (106) is provided on one side of the liquid cavity (104) close to the cavity (103), and the heat exchange channel is in communication with the liquid cavity (104); a liquid exchange port (107) for communicating with the outside is provided on the liquid cavity (104), and a condensing device for circulating a cooling medium into the liquid cavity (104) is connected to the liquid exchange port (107); The top mold (102) is provided with an injection channel (108) for injecting raw materials into the mold cavity (103).

2. A cooling device for an injection mold according to claim 1, characterized in that: The liquid exchange port (107) is provided with a threaded groove.

3. A cooling device for an injection mold according to claim 1, characterized in that: The top mold (102) and the bottom mold (101) are both provided with positioning holes (111), and positioning blocks (110) are detachably installed in the positioning holes (111).

4. A cooling device for an injection mold according to claim 3, characterized in that: The positioning block (110) is detachably mounted in the positioning hole (111) by means of bolts.

5. A cooling device for an injection mold according to claim 1, characterized in that: The top mold (102) and the bottom mold (101) are provided with connecting grooves (112).

6. A cooling device for an injection mold according to claim 1, characterized in that: A collecting hopper (113) is detachably mounted at the material inlet of the injection channel (108).

7. A cooling device for an injection mold according to claim 6, characterized in that: A stripping rod (114) is slidably mounted on the bottom mold (101), and one end of the stripping rod (114) away from the mold cavity (103) is fixedly connected to a push plate (115).

8. A cooling device for an injection mold according to claim 7, characterized in that: A guide rod (116) is fixedly connected to the bottom mold (101), and the push plate (115) is slidably mounted on the guide rod (116).

9. A cooling device for an injection mold according to claim 8, characterized in that: A spring (105) is fixedly connected to the bottom mold (101), and one end of the spring (105) away from the bottom mold (101) is fixedly connected to the push plate (115).

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