Low-pressure injection mold water cooling device
By designing a metal water-cooling box in a low-pressure injection mold, the uniform distribution of coolant is achieved, solving the problem of uneven cooling in traditional water-cooling devices and improving the molding quality and production efficiency of plastic products.
Patent Information
- Application Number
- CN202522085844.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-09-28
AI Technical Summary
Traditional low-pressure injection mold water cooling devices have a single coolant flow path, resulting in uneven cooling of the mold cavity, which affects the consistency of plastic product molding quality and production efficiency.
Design a metal water-cooled box, including a water supply box and a cooling box. The water supply component distributes the coolant evenly around each cooling tank to achieve synchronous and uniform cooling of the coolant.
It improves the molding quality of plastic products, reduces defects such as shrinkage and deformation caused by uneven cooling, and increases production efficiency.
Smart Images
Figure CN224928441U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection mold cooling, and in particular to a water cooling device for low-pressure injection molds. Background Technology
[0002] Low-pressure injection molds are key process equipment in the molding of plastic products. Their working principle involves injecting molten plastic raw material into the mold cavity, where it cools and solidifies to obtain a plastic product with a specific shape and size. During the injection molding cycle, the large amount of heat carried by the molten plastic needs to be removed quickly and effectively. The cooling efficiency of the mold directly determines the molding cycle, dimensional stability, and internal quality of the product. Therefore, forced cooling of the mold is an essential step. Water cooling, using water as the cooling medium, is widely used due to its low cost and high heat exchange efficiency.
[0003] Traditional water-cooling devices often have a relatively simple coolant flow path, which cannot directly and evenly cover all parts of the mold. Especially for multiple mold slots distributed on the mold, the coolant usually flows around each mold slot in sequence. This results in differences in the temperature and flow rate of the coolant in contact with different mold slots, which in turn makes it impossible for the cooling rate of each mold slot to be synchronized, affecting the consistency of molding quality and production efficiency of plastic products. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of traditional low-pressure injection mold water cooling devices in the prior art, which suffer from uneven cooling, and to propose a new low-pressure injection mold water cooling device.
[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution: A water-cooling device for a low-pressure injection mold includes a low-pressure injection mold body. The low-pressure injection mold body has a transversely penetrating mounting groove in the middle. A metal water-cooling box is installed in the mounting groove. The upper surface of the metal water-cooling box has cooling grooves that are adapted to the mold grooves of the low-pressure injection mold body. The metal water-cooling box is composed of an independent but assembleable water supply box and a cooling box. The water supply box and the cooling box are equipped with water supply components for delivering coolant to the cooling box and distributing the coolant evenly around each cooling groove.
[0006] Preferably, the water supply assembly includes a partition fixedly installed in the middle of the water supply box, the partition being used to separate the water supply box into two spaces, both ends of the two spaces of the water supply box being equipped with first pipes, and a plurality of second pipes being evenly installed at the bottom of the cooling box, the lower ends of the second pipes being connected to the two spaces of the water supply box.
[0007] Preferably, the first pipe includes an external water inlet pipe and an external water outlet pipe fixedly installed at both ends of the water supply box, and the external water inlet pipe and the external water outlet pipe are respectively connected to two spaces of the water supply box.
[0008] Preferably, the second pipe includes a plurality of internal water inlet pipes and internal drain pipes vertically installed at the bottom of the cooling box, wherein the internal water inlet pipes and internal drain pipes are respectively connected to two spaces of the water supply box.
[0009] Preferably, a fixing component is provided between the two ends of the metal water-cooled box and the low-pressure injection mold body. The fixing component includes a fixing frame, which is fixedly connected to the outer wall of the low-pressure injection mold body by high-strength bolts. A screw is threaded on the fixing frame, and a connecting plate is rotatably connected to the upper end of the screw. A connecting frame is provided at the bottom of the metal water-cooled box, and the connecting plate is inserted into the connecting frame.
[0010] Preferably, two limiting rods are vertically fixed on the fixing frame, and the upper ends of the two limiting rods pass through the connecting plate.
[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, cooling grooves adapted to the mold slots are opened on the metal water-cooling box, and coolant is quickly delivered into the cooling box using a water supply component, so that the coolant directly surrounds each cooling groove instead of flowing through them sequentially. This allows each mold slot to receive the cooling effect of the coolant simultaneously and evenly, resulting in more synchronized cooling speeds, greatly improving the molding quality of plastic products and reducing defects such as shrinkage marks and deformation caused by uneven cooling. Attached Figure Description
[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the metal water-cooled box installation structure of this utility model; Figure 3 This is a cross-sectional view of the cooling box structure of this utility model; Figure 4 This is a schematic diagram of the fixing component structure of this utility model.
[0013] The numbers in the diagram are as follows: 1. Low-pressure injection mold body; 11. Mounting slot; 12. Metal water-cooling box; 121. Water supply box; 122. Cooling box; 13. Cooling tank; 2. Water supply assembly; 21. Partition plate; 3. First pipe; 31. External water inlet pipe; 32. External drain pipe; 4. Second pipe; 41. Internal water inlet pipe; 42. Internal drain pipe; 5. Fixing assembly; 51. Fixing bracket; 52. Screw; 53. Connecting plate; 54. Connecting frame; 55. High-strength bolt; 6. Limiting rod. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0016] In the description of this specification, the references to terms such as "embodiment," "one embodiment," "some implementations," "exemplary," and "one implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.
[0017] Example: This example provides a water-cooling device for low-pressure injection molds. See [link / reference] Figure 1-4 Specifically, it includes a low-pressure injection mold body 1, with a horizontally penetrating mounting groove 11 in the middle of the low-pressure injection mold body 1. A metal water-cooling box 12 is installed in the mounting groove 11. A cooling groove 13 is opened on the upper surface of the metal water-cooling box 12, which is adapted to the mold groove of the low-pressure injection mold body 1. The metal water-cooling box 12 is composed of a water supply box 121 and a cooling box 122 that are independent and can be assembled and connected. A water supply component 2 is provided on the water supply box 121 and the cooling box 122 for supplying coolant to the cooling box 122 and distributing the coolant evenly around each cooling groove 13.
[0018] In this embodiment, the mounting groove 11 provides an installation position for the metal water-cooled box 12. The height of the mounting groove 11 is greater than the height of the metal water-cooled box 12. After the metal water-cooled box 12 enters the mounting groove 11, it moves upward, allowing the cooling groove 13 to fit against the outer wall of the mold groove of the low-pressure injection mold body 1. The metal water-cooled box 12, through the cooling groove 13 on its upper surface, cooperates with the mold groove to cool the injection-molded product in the mold groove, accelerating product molding and improving production efficiency. The cooling groove 13 is adapted to the mold groove, enabling more direct and effective cooling of the product in the mold groove, resulting in a more uniform cooling effect. The water supply assembly 2 is used to provide coolant circulation.
[0019] In the specific implementation process, such as Figure 2 and Figure 3 As shown, the water supply assembly 2 includes a partition 21 fixedly installed in the middle of the water supply box 121. The partition 21 is used to separate the water supply box 121 into two spaces. A first pipe 3 is installed at both ends of the two spaces of the water supply box 121. A plurality of second pipes 4 are evenly installed at the bottom of the cooling box 122. The lower end of the second pipes 4 is connected to the two spaces of the water supply box 121.
[0020] In this embodiment, the water delivery box 121, serving as part of the coolant storage and delivery channel, is divided into two spaces by a partition 21 to facilitate coolant circulation. The cooling box 122 is in direct contact with the cooling tank 13, and the coolant enters the cooling box 122 through the second pipe 4 at its bottom, cooling the area surrounding the cooling tank 13. The partition 21 divides the water delivery box 121 into two independent spaces, allowing the coolant to flow along a specific path, achieving coolant circulation. This split design simplifies the complex internal flow channel processing into two relatively simple components, facilitating manufacturing, cleaning, and maintenance. The cooling box 122 directly contacts the high-temperature mold for heat exchange, while the water delivery box 121 focuses on fluid distribution and collection, achieving functional separation.
[0021] In the specific implementation process, such as Figure 2 and Figure 3 As shown, the first pipe 3 includes an external water inlet pipe 31 and an external drain pipe 32 fixedly installed at both ends of the water supply box 121. The external water inlet pipe 31 and the external drain pipe 32 are respectively connected to two spaces of the water supply box 121.
[0022] In this embodiment, the external inlet pipe 31 is used to introduce external coolant into one space of the water supply box 121, and the external drain pipe 32 is used to drain the coolant in another space of the water supply box 121 to the outside, thereby refreshing the coolant. Both the external inlet pipe 31 and the external drain pipe 32 are connected to an external fluid delivery device.
[0023] In the specific implementation process, such as Figure 2 and Figure 3As shown, the second pipe 4 includes multiple internal water inlet pipes 41 and internal drain pipes 42 that are vertically installed at the bottom of the cooling box 122. The internal water inlet pipes 41 and internal drain pipes 42 are respectively connected to two spaces of the water supply box 121.
[0024] In this embodiment, the internal water inlet pipe 41 transports the coolant in one space of the water supply box 121 to the cooling box 122, and the internal drain pipe 42 drains the used coolant in the cooling box 122 back to another space of the water supply box 121, forming an internal circulation of coolant. The upper end of the internal water inlet pipe 41 is higher than the internal drain pipe 42. The internal water inlet pipe 41 and the internal drain pipe 42 have the same diameter and are equidistantly distributed along the length of the cooling box 122. Each set of internal water inlet pipes 41 and internal drain pipes 42 is set at the corresponding cooling tank 13 to ensure that the flow rate of each cooling tank 13 is consistent.
[0025] In the specific implementation process, such as Figure 3 and Figure 4 As shown, a fixing component 5 is provided between the two ends of the metal water-cooled box 12 and the low-pressure injection mold body 1. The fixing component 5 includes a fixing frame 51, which is fixedly connected to the outer wall of the low-pressure injection mold body 1 by high-strength bolts 55. A screw 52 is threaded on the fixing frame 51, and a connecting plate 53 is rotatably connected to the upper end of the screw 52. A connecting frame 54 is provided at the bottom of the metal water-cooled box 12, and the connecting plate 53 is inserted into the connecting frame 54. Two limiting rods 6 are vertically fixed on the fixing frame 51, and the upper ends of the two limiting rods 6 pass through the connecting plate 53.
[0026] In this embodiment, after the connecting plate 53 is inserted into the connecting frame 54 at the bottom of the metal water-cooled box 12, the position of the fixing bracket 51 is fixed by high-strength bolts 55. By rotating the screw 52, the metal water-cooled box 12 moves upward along the fixing bracket 51. The upper end of the screw 52 pushes the connecting plate 53 downward. The connecting plate 53, through the connecting frame 54, drives the metal water-cooled box 12 upward, fitting against the top of the mounting groove 11, thus fixing the metal water-cooled box 12 and facilitating maintenance of the metal water-cooled box 12. When the connecting plate 53 moves, it is limited by the limiting rod 6, so that it can only move vertically.
[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A water-cooling device for a low-pressure injection mold, comprising a low-pressure injection mold body (1), characterized in that: The low-pressure injection mold body (1) has a horizontally penetrating mounting groove (11) in the middle. A metal water-cooling box (12) is installed in the mounting groove (11). A cooling groove (13) adapted to the mold groove of the low-pressure injection mold body (1) is opened on the upper surface of the metal water-cooling box (12). The metal water-cooling box (12) is composed of a water supply box (121) and a cooling box (122) that are independent and can be assembled and connected. A water supply component (2) is provided on the water supply box (121) and the cooling box (122) to transport the coolant to the cooling box (122) and to make the coolant evenly distributed around each cooling groove (13).
2. The water-cooling device for low-pressure injection molds according to claim 1, characterized in that: The water supply assembly (2) includes a partition (21) fixedly installed in the middle of the water supply box (121). The partition (21) is used to separate the water supply box (121) into two spaces. A first pipe (3) is installed at both ends of the two spaces of the water supply box (121). A plurality of second pipes (4) are evenly installed at the bottom of the cooling box (122). The lower end of the second pipe (4) is connected to the two spaces of the water supply box (121).
3. The water-cooling device for low-pressure injection molds according to claim 2, characterized in that: The first pipe (3) includes an external water inlet pipe (31) and an external drain pipe (32) fixedly installed at both ends of the water supply box (121). The external water inlet pipe (31) and the external drain pipe (32) are respectively connected to two spaces of the water supply box (121).
4. The water-cooling device for low-pressure injection molds according to claim 3, characterized in that: The second pipe (4) includes multiple internal water inlet pipes (41) and internal drain pipes (42) installed vertically at the bottom of the cooling box (122), and the internal water inlet pipes (41) and internal drain pipes (42) are respectively connected to two spaces of the water supply box (121).
5. The water-cooling device for low-pressure injection molds according to claim 1, characterized in that: A fixing component (5) is provided between the two ends of the metal water-cooled box (12) and the low-pressure injection mold body (1). The fixing component (5) includes a fixing frame (51). The fixing frame (51) is fixedly connected to the outer wall of the low-pressure injection mold body (1) by high-strength bolts (55). A screw (52) is threaded on the fixing frame (51). A connecting plate (53) is rotatably connected to the upper end of the screw (52). A connecting frame (54) is provided at the bottom of the metal water-cooled box (12). The connecting plate (53) is inserted into the connecting frame (54).
6. The water-cooling device for a low-pressure injection mold according to claim 5, characterized in that: Two limiting rods (6) are vertically fixed on the fixing frame (51), and the upper ends of the two limiting rods (6) pass through the connecting plate (53).