High-precision foam forming mold with layered temperature control

Abstract

The utility model relates to a high-precision foam forming mould with layered temperature control belongs to foam forming mould technical field, including work table and set up in the top plate of work table, the top of work table is provided with the heating cooling component that can carry out heating cooling processing to the foam raw material in movable mould inside, the heating cooling component includes the lower mould component fixedly connected in work table top, the inside of lower mould component is opened has with outside intercommunication's steam heating channel. This high-precision foam forming mould with layered temperature control, through independently setting up steam heating channel and the serpentine cooling channel below it in the inside of lower mould component, realized the independent temperature control of the mould's '' first heating after cooling '' in stages, steam heating channel and the branch channel design that it intercommunication, greatly increased the contact area and the residence time of heating steam and mould steel, ensure that the mould can evenly, quickly rise to the required foaming temperature in short time.

Description

Technical Field

[0001] This utility model relates to the field of foam molding mold technology, specifically a high-precision foam molding mold with layered temperature control. Background Technology

[0002] Foam molding molds are key tooling devices used to fill molds with foaming resin, which is then heated, melted, foamed, and cooled to solidify, producing foamed plastic parts. In the production process of foam products, the precision and uniformity of the mold's temperature control directly determine the product's molding quality, density distribution, surface finish, and production cycle. Traditional foam molding molds often have relatively simple temperature control systems, typically consisting of only simple straight-through channels inside the mold for introducing heating steam or cooling water.

[0003] Chinese utility model patent CN222309570U discloses a foam molding mold, including a base plate. The top of the base plate is fixedly connected to the bottom of an upper main body. Telescopic devices are provided on both sides of the bottom of the upper main body, and the bottom of the upper main body is fixedly connected to the top of the telescopic devices. The bottom of the telescopic devices is fixedly connected to the top of an upper mold plate. The top of the base plate, near the middle, is fixedly connected to the bottom of a lower mold plate. A demolding mechanism is provided at the bottom of the lower mold plate. This utility model, through the design of the demolding mechanism, achieves automatic demolding via a device. It solves the problem that existing devices do not have components for easy demolding and removal, requiring manual removal of the processed foam. Since the freshly processed foam adheres to the inner wall of the lower mold, removal is difficult and cumbersome. This invention improves the convenience of demolding.

[0004] However, in the process of using this utility model, the solution mainly focuses on the mechanization improvement of the demolding mechanism, without optimizing the temperature control system of the mold body. As a result, it is impossible to achieve heating and cooling of foam raw materials. Therefore, a high-precision foam molding mold with layered temperature control is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a high-precision foam molding mold with layered temperature control, which has the advantage of achieving precise temperature control in layers. This solves the problem that the existing solutions mainly focus on the mechanization improvement of the demolding mechanism, without optimizing the temperature control system of the mold body, thus failing to achieve heating and cooling of the foam raw material.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-precision foam molding mold with layered temperature control, comprising a worktable and a top plate disposed on the worktable, wherein the top of the worktable is provided with a heating and cooling component capable of heating and cooling the foam raw material inside the moving mold;

[0007] The heating and cooling assembly includes a lower mold assembly fixedly connected to the top of the workbench. The lower mold assembly has a steam heating channel inside that communicates with the outside. The left and right sides of the lower mold assembly are respectively fixedly connected to an air inlet port and an air outlet port that communicate with the steam heating channel. The lower mold assembly also has a cooling channel inside that communicates with its front side.

[0008] Furthermore, the cooling channel is located at the bottom of the steam heating channel, and a mold groove for facilitating foam molding is provided on the upper surface of the lower mold assembly.

[0009] Furthermore, the lower mold assembly has a branch channel connected to the steam heating channel inside, and the cooling channel is a serpentine channel. The special design of the cooling channel and the steam heating channel can significantly improve the contact area and contact time between the heating steam and cooling water and the lower mold assembly.

[0010] Furthermore, the workbench is equipped with an ejector pin demolding mechanism to facilitate the demolding of the molded foam. The ejector pin demolding mechanism includes two ejector rods that are slidably connected to the inside of the workbench and extend into the inside of the lower mold assembly. The top of the ejector rods is flush with the inner bottom wall of the mold groove.

[0011] Furthermore, the worktable is internally rotatably connected to a drive shaft, and externally connected to a rotating plate. A connecting plate is fixedly connected between the bottom ends of the two ejector rods, and a hinge rod is hinged between the rotating plate and the connecting plate.

[0012] Furthermore, a drive motor capable of driving the drive shaft to rotate is fixedly connected inside the worktable, and there are two rotating plates, which are symmetrically distributed outside the drive shaft.

[0013] Furthermore, the top of the workbench is fixedly connected to four support rods that penetrate the top plate, and all four support rods are fixedly connected to the top plate.

[0014] Furthermore, a hydraulic cylinder extending to the bottom of the top plate is fixedly connected to the top of the top plate, an upper mold assembly is fixedly connected to the output end of the hydraulic cylinder, and an upper mold head capable of sealing with the lower mold assembly is fixedly connected to the bottom of the upper mold assembly.

[0015] Compared with the prior art, this utility model provides a high-precision foam molding mold with layered temperature control, which has the following beneficial effects:

[0016] 1. This high-precision foam molding mold with layered temperature control achieves phased independent temperature control of the mold by independently setting a steam heating channel inside the lower mold assembly and a serpentine cooling channel below it. The design of the steam heating channel and its connected branch channels greatly increases the contact area and residence time between the heating steam and the mold steel, ensuring that the mold can rise to the required foaming temperature uniformly and quickly in a short time, so that the raw material can be fully and homogeneously melted. In the subsequent cooling stage, the serpentine cooling channel also increases the flow channel length and contact area, so that the cooling water can efficiently and uniformly remove the heat from the mold, achieving rapid and uniform cooling and shaping.

[0017] 2. This high-precision foam molding mold with layered temperature control uses a drive motor to drive the drive shaft and rotating plate. The rotational motion is converted into the synchronous linear upward motion of two ejector rods through the hinge rod and connecting plate, thus smoothly ejecting the product from the mold slot. Compared with the demolding mechanism in the comparison document that requires manual operation, this solution automates the demolding action, is more efficient, and provides stable and uniform ejection force, further protecting the fragile foam product from damage during demolding. The heating and cooling components and the ejector pin demolding mechanism have comprehensively upgraded the mold from the two key aspects of "molding quality" and "removal efficiency". Attached Figure Description

[0018] Figure 1 This is a perspective view of the present utility model;

[0019] Figure 2 This is an exploded view of the heating and cooling assembly of this utility model;

[0020] Figure 3 This is a perspective view of the ejector pin demolding mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the mold assembly of this utility model.

[0022] In the diagram: 1. Workbench; 2. Top plate; 3. Lower mold assembly; 4. Steam heating channel; 5. Air inlet port; 6. Air outlet port; 7. Cooling channel; 8. Mold groove; 9. Ejector rod; 10. Connecting plate; 11. Drive shaft; 12. Rotating plate; 13. Hinge rod; 14. Drive motor; 15. Support rod; 16. Hydraulic cylinder; 17. Upper mold assembly; 18. Upper mold head. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 and Figure 2 This embodiment of a high-precision foam molding mold with layered temperature control includes a workbench 1 and a top plate 2 disposed on the workbench 1. The top of the workbench 1 is provided with a heating and cooling assembly capable of heating and cooling the foam raw material inside the moving mold. The heating and cooling assembly includes a lower mold assembly 3 fixedly connected to the top of the workbench 1. The lower mold assembly 3 has a steam heating channel 4 connected to the outside. The left and right sides of the lower mold assembly 3 are respectively fixedly connected with an air inlet port 5 and an air outlet port 6 connected to the steam heating channel 4. The lower mold assembly 3 has a cooling channel 7 connected to its front side.

[0025] Specifically, the cooling channel 7 is located at the bottom of the steam heating channel 4, and the upper surface of the lower mold assembly 3 is provided with a mold groove 8 to facilitate foam molding. The interior of the lower mold assembly 3 is provided with a branch channel connected to the steam heating channel 4. The cooling channel 7 is a serpentine channel. The special design of the cooling channel 7 and the steam heating channel 4 can significantly improve the contact area and contact time between the heating steam and cooling water and the lower mold assembly 3.

[0026] It should be noted that the steam heating channel 4 and the cooling channel 7 adopt an independent structure design with upper and lower layers. A heat insulation layer is set between the two, which can realize independent closed-loop control of the heating and cooling processes without interference. This solves the problems of low temperature control accuracy, large heat loss and cold loss and high energy consumption caused by the traditional integrated heating and cooling design of molds.

[0027] Please see Figure 1 and Figure 3 In this embodiment, the workbench 1 is provided with an ejector pin demolding mechanism to facilitate the demolding of the molded foam. The ejector pin demolding mechanism includes two ejector rods 9 that are slidably connected inside the workbench 1 and extend into the lower mold assembly 3. The top of the ejector rods 9 is flush with the inner bottom wall of the mold groove 8. A drive shaft 11 is rotatably connected inside the workbench 1. A rotating plate 12 is fixedly connected to the outside of the drive shaft 11. A connecting plate 10 is fixedly connected between the bottom ends of the two ejector rods 9. A hinge rod 13 is hinged between the rotating plate 12 and the connecting plate 10.

[0028] Specifically, the workbench 1 is internally fixedly connected to a drive motor 14 that can drive the drive shaft 11 to rotate. There are two rotating plates 12, which are symmetrically distributed outside the drive shaft 11. The ejector rod 9 does not interfere with the cooling channel 7 and the steam heating channel 4.

[0029] It should be noted that the ejector pin demolding mechanism adopts a motor-driven crank-connecting rod structure, replacing the traditional manual rotation demolding structure. This enables fully automated demolding operations, significantly reducing the intensity of manual operation and directly adapting to the continuous operation requirements of automated production lines. The symmetrically arranged double rotating plates 12 and double hinge rods 13 structure ensure that the connecting plate 10 drives the two ejector rods 9 to move vertically synchronously. The ejection force is evenly distributed at the bottom of the foam product, avoiding damage or deformation of the product due to excessive force at a single point, and effectively improving the demolding yield.

[0030] Please see Figure 1 and Figure 4 In this embodiment, the top of the workbench 1 is fixedly connected to four support rods 15 that penetrate the top plate 2. All four support rods 15 are fixedly connected to the top plate 2. The top of the top plate 2 is fixedly connected to a hydraulic cylinder 16 that extends to its bottom. The output end of the hydraulic cylinder 16 is fixedly connected to an upper mold assembly 17. The bottom of the upper mold assembly 17 is fixedly connected to an upper mold head 18 that can seal with the lower mold assembly 3.

[0031] Specifically, the bottom of the upper mold assembly 17 is fixedly connected to a positioning post extending into the interior of the lower mold assembly 3, and the upper surface of the lower mold assembly 3 is provided with a positioning groove that matches the positioning post. Both the upper mold head 18 and the mold groove 8 are provided with an anti-sticking coating.

[0032] The working principle of the above embodiments is as follows:

[0033] First, the piston rod of the hydraulic cylinder 16 is extended, driving the upper mold assembly 17 and the upper mold head 18 to descend vertically, completing the mold closing action. This causes the upper mold head 18 and the mold groove 8 of the lower mold assembly 3 to enclose a closed foam molding cavity. Foam molding material is then filled into the cavity. Next, high-temperature steam is introduced into the steam heating channel 4 through the air inlet port 5. The steam is evenly distributed in the area below the mold groove 8 through branch channels, uniformly and stably heating the foam material in the cavity, allowing the material to fully melt and foam. During the heating process, the steam after heat exchange is discharged through the air outlet port 6 and recycled. After the foaming process is completed, the steam supply is stopped, and circulating cooling water is introduced into the cooling channel 7. The serpentine arrangement of the cooling channel 7 allows the cooling water to circulate with the steam. The lower mold assembly 3 undergoes thorough heat exchange, rapidly and uniformly cooling the molding cavity to allow the foam product to cool and solidify. After solidification, the piston rod of the hydraulic cylinder 16 retracts, driving the upper mold assembly 17 and the upper mold head 18 to move vertically upward, completing the mold opening action. Subsequently, the drive motor 14 is started, driving the drive shaft 11 and the rotating plate 12 to rotate synchronously. The rotating plate 12 pushes the connecting plate 10 vertically and smoothly upward through the hinge rod 13, thereby driving the two ejector rods 9 to push upward synchronously, smoothly ejecting the molded foam product from the mold groove 8 and completing the demolding operation. After demolding, the drive motor 14 rotates in the opposite direction, driving the ejector rods 9 to return to the initial position where the top is flush with the bottom wall of the mold groove 8, waiting for the next molding cycle.

[0034] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0035] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision foam molding mold with layered temperature control, comprising a worktable (1) and a top plate (2) disposed on the worktable (1), characterized in that: The top of the workbench (1) is provided with a heating and cooling assembly capable of heating and cooling the foam material inside the moving mold; The heating and cooling assembly includes a lower mold assembly (3) fixedly connected to the top of the workbench (1). The lower mold assembly (3) has a steam heating channel (4) connected to the outside. The left and right sides of the lower mold assembly (3) are respectively fixedly connected to an air inlet (5) and an air outlet (6) connected to the steam heating channel (4). The lower mold assembly (3) has a cooling channel (7) connected to its front side.

2. The high-precision foam molding mold with layered temperature control according to claim 1, characterized in that: The cooling channel (7) is located at the bottom of the steam heating channel (4), and the upper surface of the lower mold assembly (3) is provided with a mold groove (8) to facilitate foam molding.

3. A high-precision foam molding mold with layered temperature control according to claim 1, characterized in that: The lower mold assembly (3) has a branch channel connected to the steam heating channel (4) inside. The cooling channel (7) is a serpentine channel. The design of the cooling channel (7) and the steam heating channel (4) can significantly improve the contact area and contact time between the heating steam and cooling water and the lower mold assembly (3).

4. A high-precision foam molding mold with layered temperature control according to claim 2, characterized in that: The workbench (1) is equipped with an ejector pin demolding mechanism for demolding the molded foam. The ejector pin demolding mechanism includes two ejector rods (9) that are slidably connected inside the workbench (1) and extend into the lower mold assembly (3). The top of the ejector rods (9) is flush with the inner bottom wall of the mold groove (8).

5. A high-precision foam molding mold with layered temperature control according to claim 4, characterized in that: The workbench (1) is rotatably connected to a drive shaft (11), and a rotating plate (12) is fixedly connected to the outside of the drive shaft (11). A connecting plate (10) is fixedly connected between the bottom ends of the two ejector rods (9), and a hinge rod (13) is hinged between the rotating plate (12) and the connecting plate (10).

6. A high-precision foam molding mold with layered temperature control according to claim 5, characterized in that: The workbench (1) is fixedly connected to a drive motor (14) that can drive the drive shaft (11) to rotate. There are two rotating plates (12), which are symmetrically distributed outside the drive shaft (11).

7. A high-precision foam molding mold with layered temperature control according to claim 1, characterized in that: The top of the workbench (1) is fixedly connected to four support rods (15) that penetrate the top plate (2), and all four support rods (15) are fixedly connected to the top plate (2).

8. A high-precision foam molding mold with layered temperature control according to claim 1, characterized in that: The top of the top plate (2) is fixedly connected to a hydraulic cylinder (16) extending to its bottom. An upper mold assembly (17) is fixedly connected to the output end of the hydraulic cylinder (16). An upper mold head (18) that can seal with the lower mold assembly (3) is fixedly connected to the bottom of the upper mold assembly (17).

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