Mold insert pin structure with cooling channel

Abstract

The utility model discloses a mold insert pin structure with a cooling channel in the field of mold insert pins. The mold insert pin structure comprises a hollow fixing sleeve and an ejector pin movably arranged in the hollow fixing sleeve. The first annular groove and the two second annular grooves are coaxially formed in the outer side of the fixing sleeve, the second annular grooves are distributed in the two ends of the first annular groove, sealing rings are arranged in the second annular grooves, cooling water can be effectively prevented from leaking, and stable operation of a cooling system is guaranteed. The heat dissipation piece is installed in the first annular groove and composed of a heat dissipation patch and a plurality of heat dissipation fins, and the heat dissipation patch is coaxially arranged at the bottom of the first annular groove in a sleeving mode and can rapidly absorb heat of the mold insert pin. The heat dissipation fins are arranged on the outer side of the heat dissipation patch in parallel in the circumferential direction, and every two adjacent heat dissipation fins are distributed in a staggered mode to form a bent cooling channel. Due to the unique design, the contact area and the contact time of cooling water and the radiating fins are increased, the cooling water can exchange heat with the radiating fins more sufficiently in the flowing process, the radiating efficiency is greatly improved, the working temperature of the mold insert pin is effectively reduced, and the service life of a mold is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of mold insert technology, specifically a mold insert structure with cooling channels. Background Technology

[0002] In the field of mold manufacturing and processing, mold inserts, as key molding components, play a crucial role in the stability and reliability of their performance, which is essential for the quality of molded products and production efficiency. With the increasing demands of modern industry for precision, quality, and production efficiency in molded products, the high-temperature problem faced by mold inserts during operation is becoming increasingly prominent. Existing mold insert structures are significantly inadequate in terms of heat dissipation, making it difficult to meet the needs of actual production.

[0003] Currently, traditional mold insert structures mostly focus on achieving the molding function. During the molding process, plastic and other molding materials undergo physical and chemical changes under high temperature and high pressure. The mold insert is in direct contact with the molding material and absorbs a large amount of heat, causing its operating temperature to rise sharply. Excessive operating temperature can cause a series of problems. For example, the thermal expansion of the mold insert material may lead to a decrease in the fit accuracy between it and other parts of the mold, or even jamming, affecting the normal opening and closing of the mold and the smooth progress of the molding operation. Long-term high temperature environment will also accelerate the wear and aging of the mold insert, reduce its service life, and increase the maintenance and replacement costs of the mold.

[0004] Furthermore, due to the lack of an effective heat dissipation structure in the mold inserts, heat cannot be dissipated in time, leading to heat accumulation in and around the mold inserts. This heat accumulation not only affects the performance of the mold inserts themselves but also adversely impacts the quality of the molded products. For example, uneven cooling of the molding material within the mold can result in defects such as uneven shrinkage, deformation, and excessive internal stress in the product, reducing dimensional accuracy and quality stability, increasing the defect rate, and severely impacting the company's production and economic benefits. Utility Model Content

[0005] In order to overcome the shortcomings of existing technical solutions, this utility model provides a mold insert structure with cooling channels, which can effectively solve the technical problem that current mold inserts are not easy to dissipate heat quickly.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] The mold insert structure with cooling channel includes a hollow fixed sleeve and an ejector pin movably disposed inside the fixed sleeve. The outer side of the fixed sleeve is coaxially provided with a first annular groove and two second annular grooves. The two second annular grooves are distributed at both ends of the first annular groove, and a sealing ring is installed in the second annular groove.

[0008] A heat dissipation component is installed in the first annular groove. The heat dissipation component includes a heat dissipation patch and multiple heat dissipation fins. The heat dissipation patch is coaxially sleeved at the bottom of the first annular groove. The heat dissipation fins are arranged circumferentially parallel to the outside of the heat dissipation patch, and adjacent heat dissipation fins are staggered to form a curved cooling channel.

[0009] Furthermore, one end of the ejector pin extends and pushes out of the top of the fixing sleeve, and the other end of the ejector pin is coaxially provided with a first protrusion.

[0010] Furthermore, a second protrusion is coaxially provided at one end of the fixing sleeve, and the second protrusion and the first protrusion form an openable contact surface.

[0011] Furthermore, the second annular groove is provided with a first concave-convex surface in the circumferential direction, and the inner wall of the sealing ring is provided with a second concave-convex surface that matches the first concave-convex surface.

[0012] Furthermore, one end of the heat dissipation fin is fixed to the inner wall of the first annular groove, the other end of the heat dissipation fin extends axially along the fixing sleeve, and the heat dissipation fin has a plurality of holes with both ends open.

[0013] Furthermore, the heat dissipation patch is composed of several patch units forming a closed loop, and adjacent patch units are welded and fixed together.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The mold insert structure with cooling channel provided by this utility model has a first annular groove on the outside of the fixed sleeve that contacts the water flow inside the mold. A heat dissipation component is provided in the first annular groove to facilitate heat dissipation and form a cooling channel. Through a unique structural design, the heat dissipation component increases the contact area and contact time between the cooling water and the heat dissipation fins, so that the cooling water can exchange heat with the heat dissipation fins more fully during the flow process, which greatly improves the heat dissipation efficiency and effectively reduces the working temperature of the mold insert. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure and connection of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure of the fixing sleeve, sealing ring and heat sink in an embodiment of this utility model;

[0018] Figure 3 This is an exploded view of the connection between the fixing sleeve, sealing ring, and heat sink in an embodiment of this utility model;

[0019] Numbering on the map:

[0020] 1-Fixing sleeve, 2-Ejector pin, 3-Sealing ring, 4-Heat dissipation component;

[0021] 101-First annular groove, 102-Second annular groove, 103-Second protrusion, 104-First concave-convex surface;

[0022] 201 - First protrusion;

[0023] 301 - Second concave-convex surface;

[0024] 401 - Heat sink patch, 402 - Heat sink fins, 403 - Hole position;

[0025] 4011 - Surface Mount Monomer. Detailed Implementation

[0026] 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.

[0027] like Figure 1-3 As shown, this technical solution provides a mold insert structure with cooling channels. This mold insert structure is mainly used inside the lower mold core. Its overall structure includes a hollow fixed sleeve 1 and an ejector pin 2 movably disposed inside the fixed sleeve 1. The fixed sleeve 1 is installed in the cooling water channel inside the lower mold core, allowing the water in the cooling water channel to contact the heat dissipation component 4 on the first annular groove 101, thereby achieving cooling of the mold insert structure. It should be noted that, in order to allow the structure of the heat dissipation component 4 to form a better cooling channel, the width of the cooling water channel inside the lower mold core is the same as the outer diameter of the upper part of the fixed sleeve 1.

[0028] The fixing sleeve 1 has a hollow structure, with a first annular groove 101 and two second annular grooves 102 coaxially arranged on its outer side. The two second annular grooves 102 are distributed at both ends of the first annular groove 101. This arrangement helps to achieve sealing and heat dissipation at different positions of the fixing sleeve 1.

[0029] One end of the fixing sleeve 1 is coaxially provided with a second protrusion 103, which plays an important role in the subsequent cooperation with the ejector pin 2.

[0030] The second annular groove 102 has a first concave-convex surface 104 circumferentially arranged for tight engagement with the sealing ring 3. The sealing ring 3 is installed in the second annular groove 102, and its inner wall has a second concave-convex surface 301 that matches the first concave-convex surface 104. Through the mutual engagement of the first concave-convex surface 104 and the second concave-convex surface 301, the sealing ring 3 can be tightly installed in the second annular groove 102, effectively preventing cooling water from leaking from the second annular groove 102 and ensuring the normal operation of the cooling system.

[0031] Ejector pin 2 is movably disposed inside the fixed sleeve 1. One end of it extends out and pushes out the top of the fixed sleeve 1. During the operation of the mold, this end is used to contact the forming part of the mold to realize the ejection function.

[0032] The other end of the ejector pin 2 is coaxially provided with a first protrusion 201, which forms an openable contact surface with the second protrusion 103 of the fixed sleeve 1. When the ejector pin 2 moves within the fixed sleeve 1, the contact surface of the first protrusion 201 and the second protrusion 103 will open or close accordingly. This design can ensure the stability and sealing of the ejector pin 2 during its movement.

[0033] A heat sink 4 is installed within the first annular groove 101. The heat sink 4 includes a heat sink 401 and multiple heat sink fins 402. The heat sink 401 is coaxially sleeved on the bottom of the first annular groove 101 and is composed of several individual fins 4011 forming a closed loop. Adjacent fins 4011 are welded together. This structure increases the contact area between the heat sink 401 and the bottom of the first annular groove 101, improving heat dissipation efficiency. Simultaneously, the welding method ensures the integrity and stability of the heat sink 401.

[0034] The heat dissipation fins 402 are arranged circumferentially parallel to the outer side of the heat dissipation patch 401, and adjacent heat dissipation fins 402 are staggered to form a curved cooling channel. This curved cooling channel design can increase the contact area and contact time between the cooling water and the heat dissipation fins 402, improve the heat exchange efficiency, and thus more effectively remove the heat generated by the mold insert structure.

[0035] When fixed, one end of the heat dissipation fin 402 is fixed to the inner wall of the first annular groove 101, ensuring the stability of the heat dissipation fin 402; the other end extends axially along the fixing sleeve 1, and the heat dissipation fin 402 is provided with several holes 403 with both ends open. The holes 403 can further increase the flow channels of cooling water and improve the cooling effect.

[0036] When the mold is working, cooling water in the cooling channels within the lower mold core flows into the first annular groove 101 of the fixed sleeve 1. Since the heat sink 4 is installed within the first annular groove 101, the cooling water is in full contact with the heat sink fins 402 and heat sink pads 401, carrying away the heat generated by the mold insert structure. Simultaneously, the ejector pin 2 moves within the fixed sleeve 1 according to the mold's working requirements. The openable contact surfaces of the first protrusion 201 and the second protrusion 103 ensure the stability and sealing of the ejector pin 2's movement. The sealing ring 3 effectively prevents cooling water leakage from the second annular groove 102, ensuring the normal operation of the cooling system.

[0037] Compared with traditional technologies, the mold insert structure with cooling channels provided by this technical solution has a first annular groove 101 on the outside of the fixed sleeve 1 that contacts the water flow inside the mold. A heat dissipation component 4 is provided in the first annular groove 101 to facilitate heat dissipation and form a cooling channel. Through a unique structural design, the heat dissipation component 4 increases the contact area and contact time between the cooling water and the heat dissipation fins 402, so that the cooling water can exchange heat with the heat dissipation fins 402 more fully during the flow process, which greatly improves the heat dissipation efficiency and effectively reduces the working temperature of the mold insert.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A mold insert structure with a cooling channel, comprising a hollow fixed sleeve and an ejector pin movably disposed inside the fixed sleeve, characterized in that: The outer side of the fixing sleeve is coaxially provided with a first annular groove and two second annular grooves. The two second annular grooves are distributed at both ends of the first annular groove, and a sealing ring is installed in the second annular groove. A heat dissipation component is installed in the first annular groove. The heat dissipation component includes a heat dissipation patch and multiple heat dissipation fins. The heat dissipation patch is coaxially sleeved at the bottom of the first annular groove. The heat dissipation fins are arranged circumferentially parallel to the outside of the heat dissipation patch, and adjacent heat dissipation fins are staggered to form a curved cooling channel.

2. The mold insert structure with cooling channel according to claim 1, characterized in that: One end of the ejector pin extends and pushes out of the top of the fixing sleeve, and the other end of the ejector pin is coaxially provided with a first protrusion.

3. The mold insert structure with cooling channel according to claim 2, characterized in that: One end of the fixing sleeve is coaxially provided with a second protrusion, and the second protrusion and the first protrusion form an openable contact surface.

4. The mold insert structure with cooling channel according to claim 1, characterized in that: The second annular groove has a first concave-convex surface circumferentially arranged, and the inner wall of the sealing ring has a second concave-convex surface that matches the first concave-convex surface.

5. The mold insert structure with cooling channel according to claim 1, characterized in that: One end of the heat dissipation fin is fixed to the inner wall of the first annular groove, and the other end of the heat dissipation fin extends axially along the fixing sleeve. The heat dissipation fin has several holes with two ends connected.

6. The mold insert structure with cooling channel according to any one of claims 1-5, characterized in that: The heat dissipation patch is composed of several patch units forming a closed loop, and adjacent patch units are welded and fixed together.

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