PU sole shaping device

Abstract

The utility model relates to a PU (polyurethane) sole shaping device, which comprises a lower die holder, an upper die, a die set and a refrigerant filling component fixed on the surface of the lower die holder, and effectively improves the flowing uniformity and stability of refrigerants by optimizing a cooling runner structure, strengthening sealing fit and adopting a circulating liquid cooling system. The cooling system of the device ensures that a refrigerant can uniformly take away heat on the surface of the mold, so that rapid cooling and shaping of the PU shoe sole are realized. Through the precisely designed cooling flow channel and the sealing device, refrigerant leakage is avoided, the cooling efficiency is improved, and the consistency of the cooling rate is ensured. And due to the structural design of the device, the mold is more convenient to disassemble and assemble, so that the production efficiency and the equipment adaptability are improved. The device can be widely applied to the forming process of the PU shoe sole, the forming quality is improved, the forming defects caused by uneven cooling are reduced, and the device has high technical value and practicability.

Description

Technical Field

[0001] This utility model relates to the field of PU shoe sole injection molding technology, specifically a PU shoe sole shaping device. Background Technology

[0002] Most existing PU sole molding devices employ traditional cooling systems, which typically rely on a single cooling pipe to cool the mold surface. In this traditional design, coolant flows through the cooling pipes across the outer surface of the mold, carrying away the heat generated by the mold and thus cooling and molding the PU sole. The cooling system's pipes are generally connected to the mold surface, and heat exchange occurs through the unidirectional flow of coolant, ensuring temperature control during the molding process. Furthermore, some traditional devices are designed with detachable mold sections for easy replacement with different molds.

[0003] Traditional cooling solutions have certain limitations in terms of efficiency, especially when the coolant flow is uneven or the cooling rate is inconsistent. This can lead to uneven temperature distribution during the molding process, thus affecting the molding quality of PU shoe soles. Because the cooling channel layout on the mold surface is relatively simple in traditional designs, the flow of coolant is often restricted, resulting in poor cooling in certain areas, leading to poor molding or excessively long molding times.

[0004] Furthermore, in traditional technologies, the connection between the cooling pipes and the mold surface is often poorly sealed, potentially leading to refrigerant leakage during flow and resulting in low coolant circulation efficiency. This not only affects the performance of the cooling system but may also cause instability in coolant flow, thus impacting molding quality and efficiency. At the same time, the disassembly and assembly process of the cooling system in traditional designs is relatively complex, requiring more time and labor costs, further affecting production efficiency.

[0005] In view of this, we have studied and improved the existing problems and provided a PU sole shaping device to solve the current problems. The aim of this technology is to solve the problems and improve the practical value. Utility Model Content

[0006] The present invention aims to solve the technical problems existing in the prior art or related technologies.

[0007] This utility model relates to a PU shoe sole shaping device, mainly used for rapidly cooling the heat in the PU shoe sole molding cavity and ensuring the consistency of the cooling rate during the molding process. This device improves the overall cooling effect and molding accuracy by optimizing the cooling system design, increasing the refrigerant flow efficiency, and strengthening the sealing performance.

[0008] A PU shoe sole shaping device includes: a lower mold base, an upper mold, a molding assembly, and a refrigerant filling component fixed to the surface of the lower mold base. The molding assembly includes a molding base fixed to the top surface of the lower mold base and a molding die fixed to the bottom surface of the upper mold. The surface of the upper mold is provided with an injection tube penetrating the molding die. The outer periphery of the molding base is provided with a finned groove located on the same horizontal plane as the refrigerant filling component. The refrigerant filling component includes a guide seat, a drive cylinder, and a cold cavity wall. The drive cylinder is fixed to the surface of the guide seat for driving the cold cavity wall to slide linearly on the surface of the guide seat. One side of the cold cavity wall slides opposite to one side of the molding base, and the surface of the cold cavity wall is provided with a flow channel groove facing the surface of the finned groove. The inner side of the cold cavity wall is provided with a liquid flow hole. The other side of the cold cavity wall is inclined. The bottom surface of the lower mold base is provided with a mold closing strip for abutting against the inclined surface of the cold cavity wall.

[0009] By adopting the above technical solution, this design ensures the sealing of the refrigerant flow channel through the tight fit between the cold cavity wall and the mold base surface, and the cooperation between the mold closing strip and the drive cylinder, thus preventing refrigerant leakage and ensuring the stable flow of coolant, thereby effectively improving the efficiency of the cooling system and the molding quality of the PU shoe sole.

[0010] In a preferred embodiment, this invention can be further configured such that: the inner side of the mold base and the molding die is provided with a mold cavity for molding PU shoe soles, and the finned groove routing on the outer periphery of the mold base is similar to the contour line of the PU shoe sole molding cavity. Specifically, the contour of the finned groove is the same as the contour of the PU shoe sole molding cavity to ensure that the refrigerant inside the finned groove cools the PU shoe sole at the same rate on the outer periphery of the PU shoe sole molding cavity, avoiding poor molding caused by uneven cooling.

[0011] By adopting the above technical solution, and by ensuring that the fin groove contour design is consistent with the contour of the PU shoe sole molding cavity, the refrigerant flows evenly around the entire outer periphery of the cavity, thereby achieving uniform cooling, avoiding molding defects caused by uneven cooling, and improving molding accuracy and quality.

[0012] In a preferred embodiment, the present invention can be further configured such that: the inner side of the lower mold base is provided with an ejector pin venting assembly for demolding, and the top end of the ejector pin venting assembly extends through to the inner side of the mold base for venting during the injection molding process and for venting after demolding.

[0013] By adopting the above technical solution, the ejector pin venting assembly can remove air in a timely manner during the injection molding process, reduce gas residue, ensure smooth gas flow during the molding process, and help with easy demolding after molding, thereby improving production efficiency and product quality.

[0014] In a preferred embodiment, the present invention can be further configured such that: the number of refrigerant charging components is two sets, and the two sides of the symmetrical module are arranged, the guide seat is fixed to the surface of the lower mold base, and the cold cavity walls on both sides move towards the surface of the opposing mold base.

[0015] By adopting the above technical solution, the two sets of refrigerant filling components are symmetrically arranged, which can evenly and symmetrically act on both sides of the mold, ensuring the symmetry of the refrigerant flow channel and the consistency of the cooling effect, and further improving the molding accuracy and consistency of the PU shoe sole.

[0016] In a preferred embodiment, the present invention can be further configured such that: the surfaces of the cold cavity walls on both sides are provided with liquid guide pipes that communicate with the liquid flow holes, and the liquid guide pipes on both sides of the cold cavity walls are connected to the circulating liquid cooling system.

[0017] By adopting the above technical solution, the coolant can be continuously circulated through the connection between the liquid guide pipe set on the surface of the cold cavity wall and the cooling system, ensuring a stable supply of coolant and efficient cooling, thereby effectively improving cooling efficiency and molding speed.

[0018] In a preferred embodiment, the present invention can be further configured such that the circulating liquid cooling system includes:

[0019] Cold liquid storage tank, used to store coolant;

[0020] The liquid pump delivers coolant to the inside of the flow channel through pipelines, ensuring that the coolant flows through the flow channel and finned channel and circulates with the coolant storage tank components.

[0021] A liquid cooler, fixed inside a coolant storage tank, is used to reduce the temperature of the coolant and ensure continuous and effective cooling.

[0022] By adopting the above technical solution, the circulating liquid cooling system achieves continuous flow and temperature control of the coolant through the coordinated work of the coolant storage tank, liquid pump and liquid cooler, effectively improving cooling efficiency and ensuring the stability of the cooling process, thereby improving the molding quality and consistency of PU shoe soles.

[0023] In a preferred embodiment, the present invention can be further configured such that the flow channel port faces the fin flow channel surface and is located on the same horizontal plane, and a double flow channel is formed on both sides of the mold base through the flow channel and the fin flow channel.

[0024] By adopting the above technical solution, the dual-channel design allows the refrigerant to flow evenly on both sides of the mold surface, avoiding the problem of uneven cooling on one side and improving cooling efficiency and the molding quality of the shoe sole.

[0025] The beneficial effects achieved by this utility model are as follows:

[0026] 1. In this utility model, by setting a refrigerant flow channel fin groove on the outer periphery of the mold base, the refrigerant flows on the outer periphery of the PU shoe sole molding cavity, which can uniformly remove heat, ensure a consistent cooling rate during the PU shoe sole molding process, and avoid poor molding caused by uneven cooling.

[0027] 2. In this utility model, the clamping strip and the driving cylinder are used on the surface of the cold cavity wall to make the cold cavity wall and the mold base surface fit tightly, thereby ensuring the sealing fit between the flow channel groove and the fin groove. Different types of modules can be quickly disassembled and assembled, and the leakage of refrigerant during the flow process is effectively prevented. This ensures that the refrigerant can circulate stably in the flow channel and improves the sealing performance and efficiency of the cooling system. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0029] Figure 2 This is a cross-sectional structural diagram of one embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the module and refrigerant charging assembly structure according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the refrigerant charging assembly structure according to an embodiment of the present invention.

[0032] Figure label:

[0033] 100. Lower mold base; 110. Upper mold; 120. Injection tube; 130. Mold closing strip; 200. Molding module; 210. Mold base; 220. Molding mold; 211. Flow channel; 300. Refrigerant filling assembly; 310. Guide seat; 320. Drive cylinder; 330. Cooling cavity wall; 331. Flow channel; 332. Liquid flow hole. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0035] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0036] The following is in conjunction with the appendix Figures 1-4 This invention describes a PU shoe sole shaping device provided by some embodiments of the present invention. Example 1

[0037] This embodiment provides a PU shoe sole shaping device, the main feature of which is that through an efficient cooling system, sealing design and optimized layout of mold cooling channels, it ensures uniform cooling and consistent cooling rate during the PU shoe sole molding process, and avoids refrigerant leakage, thereby improving molding quality and production efficiency.

[0038] Device Structure

[0039] This device includes: a lower mold base 100, an upper mold 110, a molding module 200, and a refrigerant filling assembly 300 fixed to the surface of the lower mold base 100. The molding module 200 includes a molding base 210 fixed to the top surface of the lower mold base 100 and a molding die 220 fixed to the bottom surface of the upper mold 110. The surface of the upper mold 110 is provided with an injection tube 120 penetrating the molding die 220, and the outer periphery of the molding base 210 is provided with a finned groove 211 located at the same horizontal plane as the refrigerant filling assembly 300.

[0040] The refrigerant charging assembly 300 includes a guide seat 310, a drive cylinder 320, and a cold cavity wall 330. The drive cylinder 320 is fixed to the surface of the guide seat 310 and is responsible for driving the cold cavity wall 330 to slide linearly on the surface of the guide seat 310. One side of the cold cavity wall 330 slides opposite to one side of the mold base 210, and the surface of the cold cavity wall 330 is provided with a flow channel groove 331 on the surface of the opposing fin groove 211. The inner side of the cold cavity wall 330 is provided with a liquid flow hole 332, and the other side is inclined.

[0041] In this embodiment, the tight fit between the cold cavity wall 330 and the surface of the mold base 210 ensures the sealing of the refrigerant flow channel and prevents refrigerant leakage. The cooperation between the sealing system's mold clamping strip 130 and the drive cylinder 320 ensures stable flow of coolant within the flow channel, improving cooling efficiency.

[0042] Cooling system design

[0043] The mold base 210 and the molding die 220 are provided with a mold cavity for molding PU shoe soles. The fin groove 211 on the outer periphery of the mold base 210 is similar to the mold cavity contour to ensure uniform flow of the refrigerant and carry away heat to avoid local overheating.

[0044] In this embodiment, the precisely designed cooling channels enable the refrigerant to flow uniformly throughout the outer periphery of the mold cavity, improving the consistency of the cooling rate and preventing molding defects.

[0045] Cooling channel sealing and refrigerant flow

[0046] The refrigerant charging assembly 300 is symmetrically arranged on both sides of the mold module 200 in two sets, ensuring that the coolant forms a dual flow channel through the cold cavity wall 330 and the fin groove 211, increasing the uniformity of coolant flow and preventing uneven local cooling.

[0047] In this embodiment, the dual-channel design allows the refrigerant to flow more evenly on both sides of the mold, improving the overall cooling efficiency.

[0048] Refrigerant circulation system

[0049] The surfaces of the cold cavity walls 330 on both sides are provided with liquid guide pipes that communicate with the liquid flow holes 332. The liquid guide pipes are connected through a circulating liquid cooling system to ensure that the coolant circulates stably in the cold cavity walls 330, carrying away the heat from the surfaces of the mold base 210 and the molding mold 220, and ensuring that the PU shoe sole is cooled quickly.

[0050] In this embodiment, the stable flow and circulation design of the coolant greatly improves the cooling efficiency and ensures a consistent cooling rate during the molding process of the PU shoe sole. Example 2

[0051] This embodiment further expands the application of this utility model. Based on the same principle, it optimizes the structure of the cooling channel and improves the working stability and ease of disassembly and assembly of the device.

[0052] Device structure and operation method

[0053] Similar to Embodiment 1, the basic structure of this device includes: a lower mold base 100, an upper mold 110, a molding die assembly 200, and a refrigerant filling assembly 300 fixed to the surface of the lower mold base 100. The molding die assembly 200 includes a molding die base 210 and a forming mold 220, and the surface of the upper mold 110 is provided with an injection tube 120 penetrating the forming mold 220. Through a precisely designed cooling channel, the fin grooves 211 on the outer periphery of the molding die base 210 inside the mold conform to the contour of the forming mold cavity, ensuring uniform refrigerant flow.

[0054] In this embodiment, in Example 2, a more efficient cooling rate was achieved by optimizing the cooling channel structure, thereby improving the molding accuracy of the PU shoe sole.

[0055] Sealing design and refrigerant flow

[0056] This embodiment particularly enhances the fit between the clamping strip 130 and the drive cylinder 320. Through the precise fit between the inclined surface and the sealing surface, a better sealing effect is ensured for the refrigerant flow channel. The drive cylinder 320 drives the cold cavity wall 330 to slide linearly on the surface of the guide seat 310, and the flow channel opened on the surface of the cold cavity wall 330 forms a sealed channel with the surface of the fin groove 211.

[0057] In this embodiment, a more precise sealing design prevents refrigerant leakage, ensures uniform flow of coolant within the flow channel, and effectively improves the cooling efficiency of the device.

[0058] Coolant circulation system

[0059] In the coolant circulation system, the same method as in Example 1 is used, in which the liquid pump, the coolant storage tank, and the liquid cooler work together. The liquid guide pipes connecting the cold cavity walls 330 on both sides to the liquid flow holes 332 enable the coolant to circulate rapidly and cool down evenly, ensuring that the heat on the surfaces of the mold base 210 and the forming mold 220 is quickly removed.

[0060] In this embodiment, the design of the circulating liquid cooling system ensures efficient use of coolant, improves overall cooling performance, and shortens the setting time of PU shoe soles.

[0061] Optimization of disassembly and assembly methods

[0062] The symmetrical design of the refrigerant filling components 300 on both sides ensures stability while also making the mold easier to assemble and disassemble. When the drive cylinder 320 drives the cooling cavity wall 330 to slide, the mold gap can be easily adjusted to meet the replacement needs of different molds.

[0063] In this embodiment, the optimized disassembly and assembly method greatly improves the efficiency of the production line, reduces equipment maintenance time, and reduces the difficulty of manual operation.

[0064] Summarize

[0065] Through the detailed descriptions of Examples 1 and 2, it can be seen that this invention significantly improves the molding precision, cooling rate, and cooling uniformity of PU shoe soles by optimizing the cooling system, sealing design, refrigerant flow channels, and coolant circulation method, while also enhancing production efficiency and equipment maintenance convenience. The two sets of symmetrically arranged refrigerant flow channels, precise refrigerant sealing, and optimized design of the liquid cooling system ensure the stability and high efficiency of this device in practical applications.

[0066] Working principle and usage process of this utility model:

[0067] The mold base 210 and the molding die 220 are respectively arranged on the top surface of the lower mold base 100 and the bottom surface of the upper mold 110. The injection tube 120 on the top surface of the upper mold 110 passes through the molding die 220 and extends to the inside of the mold base 210 and the molding die 220 for the molten PU injection liquid to enter. During the mold closing process of the upper mold 110 and the lower mold base 100, the mold base 210 and the molding die 220 close synchronously, and the cold cavity wall 330 is pushed to fit against the mold base 210 and the sides of the molding die 220 by the two drive cylinders 320. The mold closing strip 130 on the bottom surface of the upper mold 110 presses the surface of the cold cavity wall 330 obliquely to lock the position of the cold cavity wall 330 and form a tight seal with the outer periphery of the mold base 210. Thus, a complete frame-shaped flow channel cavity is formed by the combination of the flow channel groove 331 and the fin groove 211.

[0068] After injection molding, the refrigerant is injected into the flow channel cavity through the liquid flow hole 332 on the surface of the cold cavity wall 330 on one side, flows along the surface of the fin groove 211, and is discharged through the liquid flow hole 332 on the surface of the cold cavity wall 330 on the other side. The low temperature refrigerant continuously carries away the heat from the surface of the mold base 210 and the molding die 220 on the surface of the fin groove 211, thereby achieving rapid cooling of the mold assembly 200 and rapid cooling and shaping of the PU shoe sole injected inside. The drive cylinder 320 executes the movement of the cold cavity wall 330 to closely fit the surface of the mold assembly 200 and further utilizes the mold closing pressure to make the mold closing strip 130 obliquely press and lock the surface of the cold cavity wall 330, improve the sealing performance, and prevent refrigerant leakage.

[0069] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A PU sole setting device, characterized in that, The application relates to a PU shoe sole forming device, which comprises a lower die base (100), an upper die (110), a die set (200) and a refrigerant filling assembly (300) fixed to the surface of the lower die base (100), the die set (200) comprises a die base (210) fixed to the top surface of the lower die base (100) and a forming die (220) fixed to the bottom surface of the upper die (110), the surface of the upper die (110) is provided with an injection tube (120) penetrating through the forming die (220), the outer periphery of the die base (210) is provided with a fin flow groove (211) located at the same horizontal plane as the refrigerant filling assembly (300), the refrigerant filling assembly (300) comprises a guide base (310), a driving cylinder (320) and a cold cavity wall (330), the driving cylinder (320) is fixed to the surface of the guide base (310) and used for driving the cold cavity wall (330) to linearly slide on the surface of the guide base (310), one side of the cold cavity wall (330) is opposite to one side of the die base (210) and slides, the surface of the cold cavity wall (330) is provided with a flow channel groove (331) opposite to the surface of the fin flow groove (211), the inner side of the cold cavity wall (330) is provided with a liquid flow hole (332), the other side of the cold cavity wall (330) is in a slope shape, and the bottom surface of the lower die base (100) is provided with a die closing pressure strip (130) used for abutting against the slope of the cold cavity wall (330). The inner sides of the die base (210) and the forming die (220) are provided with die cavities used for PU shoe sole forming, and the fin flow groove (211) on the outer periphery of the die base (210) has a similar line to the outline of the PU shoe sole forming die cavity.

2. A PU sole setting device according to claim 1, wherein, The inner side of the lower die base (100) is provided with a ejector pin exhaust assembly used for demolding, and the top end of the ejector pin exhaust assembly penetrates through the inner side of the die base (210) and is used for exhaust during injection and demolding after forming.

3. The PU sole shaping device according to claim 1, wherein, The number of the refrigerant filling assemblies (300) is two groups, and the two groups are symmetrically arranged on the two sides of the die set (200), the guide base (310) is fixed to the surface of the lower die base (100), and the two cold cavity walls (330) are opposite to the surface of the die base (210) and move.

4. The PU sole shaping device according to claim 1, wherein, The surfaces of the two cold cavity walls (330) are both provided with liquid guide pipes communicated with the liquid flow holes (332), and the liquid guide pipes of the two cold cavity walls (330) are communicated with a circulating liquid cooling system.

5. The PU sole shaping device according to claim 1, wherein, The circulating liquid cooling system comprises:

6. A PU sole setting device as claimed in claim 5, wherein, a cold liquid storage tank used for storing cooling liquid; a liquid pump used for conveying the cooling liquid to the inside of the flow channel groove (331) through a pipeline, so that the cooling liquid flows through the flow channel groove (331) and the fin flow groove (211) and is circulated with the cold liquid storage tank component; a liquid cooler fixed to the inside of the cold liquid storage tank and used for reducing the temperature of the cooling liquid and ensuring continuous and effective cooling. The port of the flow channel groove (331) is opposite to the surface of the fin flow groove (211) and located at the same horizontal plane, and double flow channels are formed on the two sides of the die base (210) through the flow channel groove (331) and the fin flow groove (211).

7. The PU sole shaping device according to claim 1, wherein ​

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