A modular mold

Abstract

This utility model proposes a combined mold, relating to mold cooling structure technology. Specifically, it discloses a mold body with a central hole on its side wall. A mold sub-body is installed on one side of the mold body, and a protrusion is provided on the side of the mold sub-body opposite to the mold body. A connecting hole communicating with the central hole is provided on the mold sub-body. Several first cooling channels are provided in the mold body, and second cooling channels are provided in the mold sub-body. The first and second cooling channels are interconnected. The combined design of the mold body and mold sub-body avoids the scrapping of the entire mold and significantly reduces maintenance costs. The interconnected design of the axial first cooling channel and the circumferential annular second cooling channel covers the mold core and the edge of the sub-body, achieving uniform cooling throughout the entire area and significantly shortening the injection molding cycle. The annular second cooling channel dissipates heat synchronously through a spiral flow path, offsetting the radial thermal expansion of the mold sub-body and avoiding deformation or cracking caused by local overheating.

Description

Technical Field

[0001] This utility model relates to the field of mold cooling structure technology, and more specifically, to a combined mold. Background Technology

[0002] Injection molds are tools used to produce plastic products; they are also tools that give plastic products their complete structure and precise dimensions. Injection molding is a processing method used for the mass production of certain complex-shaped parts. Specifically, it refers to injecting molten plastic into a mold cavity under high pressure using an injection molding machine, and after cooling and solidification, obtaining the molded product. Injection molded products need to be cooled before demolding. To achieve rapid cooling of injection molded products, the mold is equipped with cooling channels for cooling. For ease of manufacturing, the cooling channels run through both sides of the mold, and are straight cooling channels. Straight cooling channels are difficult to cover the heat dissipation needs of the mold core (such as the cavity) and edge areas, resulting in low cooling efficiency and prolonged molding cycle. At the same time, the mold sub-body and the main body are usually fixed by welding or bolts. When the mold is locally high in temperature, radial thermal expansion can easily occur, causing deformation or cracking, affecting the dimensional accuracy of the injection molded parts. In addition, there is a risk of leakage or foreign objects blocking the cooling channels at the connection between the mold sub-body and the main body, which can lead to the sub-body being damaged and requiring the entire part to be replaced, resulting in material waste and downtime losses. Utility Model Content

[0003] The purpose of this utility model is to provide a modular mold that addresses the shortcomings of existing technologies and solves the problems mentioned in the background.

[0004] The technical solution of this utility model is implemented as follows:

[0005] The utility model provides a combined mold, including a mold body, a central hole on the side wall of the mold body, a mold sub-body installed on one side of the mold body, a protrusion on the side of the mold sub-body opposite to the mold body, a connecting hole on the mold sub-body communicating with the central hole, a plurality of first cooling channels in the mold body, a second cooling channel in the mold sub-body, and the first cooling channels and the second cooling channels communicating with each other.

[0006] In some technical solutions of this utility model, a groove communicating with the central hole is provided on the side of the mold body away from the mold sub-body.

[0007] In some technical solutions of this utility model, the inner diameter of the settling tank is larger than the inner diameter of the central hole, and the settling tank and the central hole are coaxial.

[0008] In some technical solutions of this utility model, the second cooling channel has an annular structure.

[0009] In some technical solutions of this utility model, a through hole communicating with the first cooling channel is provided on the outer side wall of the mold body.

[0010] In some technical solutions of this utility model, the first cooling channel is arranged along the axial direction of the mold body.

[0011] In some technical solutions of this utility model, the mold sub-body is integrally formed with the mold body through additive manufacturing.

[0012] In some technical solutions of this utility model, an inner bevel structure is provided on the side of the connecting hole away from the mold body. The small diameter end of the inner bevel structure faces the center hole, and the inner diameter of the small diameter end of the inner bevel structure is equal to the inner diameter of the connecting hole.

[0013] Compared with the prior art, this utility model has at least the following advantages or beneficial effects: the mold body and mold sub-body are combined in a design that allows the sub-body to be replaced individually when damaged, avoiding the scrapping of the entire mold and significantly reducing maintenance costs; the axial first cooling channel and the circumferential annular second cooling channel are connected to cover the mold core (cavity) and the edge of the sub-body, achieving uniform cooling across the entire area and significantly shortening the injection molding cycle; the annular second cooling channel dissipates heat synchronously through a spiral flow path, offsetting the radial thermal expansion of the mold sub-body and avoiding deformation or cracking caused by local overheating; the throttling valve in the through hole can adjust the flow rate of each cooling channel, adapting to the needs of multi-material co-injection molding and precisely controlling the temperature gradient in different areas. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a half-sectional structural diagram of the present invention.

[0016] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0017] Reference numerals: 1. Mold body; 2. Mold sub-body; 3. Sink; 4. Center hole; 5. Mounting slot; 6. Connecting hole; 7. Inner bevel structure; 8. First cooling channel; 9. Second cooling channel; 10. Through hole. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0020] Example

[0021] This utility model provides a combined mold, such as Figures 1-3 As shown, the mold includes a mold body 1. A central hole 4 is formed on the side wall of the mold body 1. A mold sub-body 2 is installed on one side of the mold body 1. The mold sub-body 2 has a protrusion on the side opposite to the mold body. A connecting hole 6 is formed on the mold sub-body 2, which communicates with the central hole 4. The central hole 4 and the connecting hole 6 together form an injection channel. The mold body has several first cooling channels 8, and the mold sub-body 2 has second cooling channels 9. The first cooling channels 8 and the second cooling channels 9 are interconnected. The axially arranged first cooling channels 8 and the circumferentially arranged second cooling channels 9 form a circulating cooling system. The first cooling channels 8 target high-temperature areas of the mold body (such as the core of the cavity), and the second cooling channels 9 surround the edge of the mold sub-body 2 to eliminate local thermal stress. The mold body and the mold sub-body 2 are positioned and installed through a convex-concave fit structure. The central hole 4 and the connecting hole 6 form a continuous injection channel for material injection or gas discharge. The first cooling channel 8 (axially arranged) and the second cooling channel 9 (annular structure) are connected to form a cooling circuit. The cooling medium enters from the outer through-hole 10 of the mold body, flows through the first cooling channel 8, and then enters the second cooling channel 9 of the mold sub-body 2. Finally, it is discharged through the circuit, achieving uniform cooling of the entire mold. The dual-channel cooling system covers the core and edge areas of the mold, shortening the molding cycle. The annular second cooling channel 9 counteracts the radial thermal expansion of the sub-body. The sub-body can be replaced individually, avoiding the scrapping of the entire mold.

[0022] In some technical solutions of this utility model, a recess 3 communicating with the central hole 4 is provided on the side of the mold body away from the mold sub-body 2. The inner diameter of the recess 3 is larger than that of the central hole 4, forming a stepped structure. The internal stress generated by shrinkage during material solidification is dispersed and released in the area of ​​the recess 3. The recess 3, as an extension cavity of the central hole 4, accommodates overflow or auxiliary positioning inserts during the injection molding stage, and releases stress through the space of the recess 3 during demolding. The recess 3 also provides space for nozzle installation, ensuring precise alignment between the nozzle and the injection hole, while reducing the thickness of the outer wall of the mold to reduce weight.

[0023] In some technical solutions of this utility model, the inner diameter of the sink 3 is larger than the inner diameter of the central hole 4, and the sink 3 and the central hole 4 are coaxial. The coaxial design of the sink 3 and the central hole 4 forms a coaxial flow channel, avoiding turbulence when the cooling medium or melt passes through, and achieving laminar flow transmission. The coaxial design avoids assembly eccentricity through geometric constraints, and the redundancy of the inner diameter of the sink 3 provides fault tolerance space, reduces the installation accuracy requirements, and reduces material leakage or wear problems caused by misalignment.

[0024] In some technical solutions of this utility model, the second cooling channel 9 is an annular structure. The annular second cooling channel 9 is distributed circumferentially around the mold sub-body 2, and the cooling medium flows in a spiral path, simultaneously cooling the entire circumference of the sub-body. The cross-sectional shape of the annular channel (such as elliptical or irregular structure) is determined by thermal simulation, increasing the heat exchange area by 25%. This solves the end overheating problem caused by traditional straight channels and is suitable for mold sub-body 2 with curved surfaces or irregular protrusions.

[0025] In some technical solutions of this utility model, a through hole 10 communicating with the first cooling channel 8 is provided on the outer side wall of the mold body 1. The through hole 10 serves as the inlet / outlet of the cooling system and is connected to external pipelines through a quick-connect coupling to support parallel cooling of multiple molds. A throttling valve is installed inside the through hole 10 to individually adjust the flow distribution of each channel. The valve enables zoned temperature control to meet the requirements of multi-material co-injection molding.

[0026] In some technical solutions of this utility model, the first cooling channel 8 is arranged along the axial direction of the mold body 1. The axial first cooling channel 8 is arranged parallel to the mold opening and closing direction, and the cooling medium flows linearly along the length direction. The number of first cooling channels 8 is at least two.

[0027] In some technical solutions of this utility model, the mold sub-body 2 is integrally formed with the mold body 1 through additive manufacturing. The mold sub-body 2 is manufactured layer by layer using laser cladding technology, and the cooling channels are generated simultaneously during the forming process. Additive manufacturing technology achieves a seamless connection between the mold body and the mold sub-body 2, avoiding the risk of cooling channel blockage caused by traditional welding or bolt connections. Furthermore, when the second cooling channel 9 inside the mold sub-body 2 is manufactured layer by layer using laser cladding technology, cooling channels with complex cross-sections can be designed, improving local heat exchange efficiency and enhancing the cooling efficiency of this mechanism.

[0028] In some technical solutions of this utility model, an inner bevel structure 7 is provided on the side of the connecting hole 6 away from the mold body 1. The small diameter end of the inner bevel structure 7 faces the center hole 4, and the inner diameter of the small diameter end of the inner bevel structure 7 is equal to the inner diameter of the connecting hole 6. The inner bevel structure 7 guides the melt to smoothly transition from the connecting hole 6 to the center hole 4, improving the uniformity of injection filling, reducing product surface defects, and reducing cold material at the gate.

[0029] Preferably, a plurality of annular mounting grooves 5 are formed on the outer side wall of the mold body. The annular mounting grooves 5 on the outer circumference of the mold are used to fix clamping mechanisms or sensors, improve the modularity of the mold, facilitate the integration of temperature / pressure monitoring devices, and support intelligent manufacturing.

[0030] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modular mold, characterized in that, The mold includes a mold body (1), a central hole (4) is provided on the side wall of the mold body (1), a mold sub-body (2) is installed on one side of the mold body (1), the mold sub-body (2) has a protrusion on the side away from the mold body, the mold sub-body (2) has a connecting hole (6) that communicates with the central hole (4), the mold body has a plurality of first cooling channels (8), the mold sub-body (2) has a second cooling channel (9), and the first cooling channels (8) and the second cooling channels (9) are interconnected.

2. The combined mold according to claim 1, characterized in that, The mold body has a groove (3) that communicates with the central hole (4) on the side opposite to the mold sub-body (2).

3. A combined mold according to claim 2, characterized in that, The inner diameter of the settling groove (3) is larger than the inner diameter of the central hole (4), and the settling groove (3) and the central hole (4) are coaxial.

4. A combined mold according to claim 1, characterized in that, The second cooling channel (9) has a ring structure.

5. A combined mold according to claim 1, characterized in that, The outer wall of the mold body (1) is provided with a through hole (10) that communicates with the first cooling channel (8).

6. A combined mold according to claim 5, characterized in that, The first cooling channel (8) is arranged along the axial direction of the mold body (1).

7. A combined mold according to claim 1, characterized in that, The mold sub-body (2) is integrally formed with the mold body (1) by additive manufacturing.

8. A combined mold according to claim 1, characterized in that, The connecting hole (6) has an inner bevel structure (7) on the side away from the mold body (1). The small diameter end of the inner bevel structure (7) faces the center hole (4), and the inner diameter of the small diameter end of the inner bevel structure (7) is equal to the inner diameter of the connecting hole (6).

Images