High-precision injection molding press-fit mold

Abstract

The utility model provides a high-precision injection molding press-fit mold, which relates to the field of molds, and comprises a mold frame, a movable mold, a fixed mold, a pressing plate, a pressing plate and a pressing plate, the spiral cold water channel is formed in the mold core, an inlet of the spiral cold water channel communicates with the fixed mold through a first flow channel, and an outlet of the spiral cold water channel communicates with the fixed mold through a second flow channel; and introducing a pipe fitting. The spiral cold water channel design is adopted, the contact area of cooling liquid and the mold core is increased, the cooling liquid flows along a spiral path, heat is fully taken away, the situation that a traditional water channel is unreasonable in layout is changed, the cooling efficiency is improved, and the forming period is shortened. Meanwhile, the longitudinal distances between the adjacent spiral cold water channels are equal, and the sections are trapezoidal, so that the mold core can be uniformly cooled, non-uniform shrinkage of a plastic part is avoided, the size precision is ensured, the rejection rate is reduced, and the market requirements of high-precision plastic products are met.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular to a high-precision injection molding die. Background Technology

[0002] In modern industrial production, injection molding is widely used in many fields due to its high efficiency, precision, and ability to mass-produce complex plastic products. Injection molds, as the core equipment of this process, directly affect the quality and production efficiency of plastic products.

[0003] Traditional injection molding dies suffer from significant flaws in their cooling system design. The layout of cooling channels often lacks precise planning, with some areas having sparse channels while others are overly dense. This irrational design results in low cooling efficiency during the molding process, significantly extending the cooling time and consequently lengthening the entire molding cycle, severely impacting production efficiency. Furthermore, uneven cooling leads to inconsistent shrinkage across different parts of the molded part, causing uneven shrinkage. This makes it difficult to guarantee dimensional accuracy, increasing the scrap rate and production costs, failing to meet the growing market demand for high-precision plastic products. Therefore, a high-precision injection molding die is proposed. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by employing a spiral cooling channel design. This increases the contact area between the coolant and the mold core, allowing the coolant to flow along the spiral path and effectively remove heat. This overcomes the unreasonable layout of traditional cooling channels, improving cooling efficiency and shortening the molding cycle. Furthermore, the equal longitudinal spacing and trapezoidal cross-section of adjacent spiral cooling channels ensure uniform cooling of the mold core, preventing uneven shrinkage of the plastic part, guaranteeing dimensional accuracy, reducing scrap rates, and meeting the market demand for high-precision plastic products.

[0005] In order to solve the above-mentioned technical problems, the present invention solves the problems of low cooling efficiency and uneven shrinkage caused by unreasonable water channel layout in the design of traditional injection mold cooling systems through the following technical solution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-precision injection molding die, comprising:

[0008] A mold frame on which a moving mold and a fixed mold are mounted, wherein a mold core is provided inside the fixed mold;

[0009] A spiral cooling water channel is formed inside the mold core. The inlet of the spiral cooling water channel is connected to the fixed mold through a first flow channel, and the outlet is connected to the fixed mold through a second flow channel.

[0010] The inlet pipes are inserted into the corresponding first and second flow channels to introduce coolant into the spiral cooling water channel.

[0011] Preferably, the front view cross-section of the spiral cooling water channel is trapezoidal, and the longitudinal spacing between adjacent spiral cooling water channels is equal.

[0012] Preferably, both the first flow channel and the second flow channel include a first connecting section and a second connecting section. The first connecting section is arranged laterally in the mold core and connected to the first or last end of the spiral cooling water channel. The second connecting section is arranged laterally in the fixed mold and communicates with the first connecting section. The inlet pipe is inserted from the opening of the second connecting section and extends into the interior of the first connecting section.

[0013] Preferably, the first end of the inlet pipe is connected to a fixed joint, and the outer periphery of the opening at the first end of the second connecting section is provided with a locking sleeve. The fixed joint and the locking sleeve are connected by a threaded rotation.

[0014] Preferably, the outer periphery of the opening of the fixed joint is provided with an annular limiting ring to limit the connection depth between the fixed joint and the locking sleeve.

[0015] Preferably, the opening of the fixed joint is provided with an interface for connecting an external coolant pipe.

[0016] Preferably, a first sealing ring is fitted around the outer edge of the limiting ring near the coolant pipe to seal the coolant pipe, and a second sealing ring is fitted around the outer edge of the limiting ring near the locking sleeve to seal the connection between the fixing joint and the locking sleeve.

[0017] Preferably, the diameter of the fixed joint is larger than the diameter of the inlet pipe and is adapted to the inner diameter of the first end of the second connecting section.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The high-precision injection molding die provided in this application adopts a spiral cooling channel design, which increases the contact area between the coolant and the mold core. The coolant flows along the spiral path, effectively carrying away heat, thus changing the unreasonable layout of traditional cooling channels, improving cooling efficiency, and shortening the molding cycle. Simultaneously, the equal longitudinal spacing and trapezoidal cross-section of adjacent spiral cooling channels ensure uniform cooling of the mold core, preventing uneven shrinkage of the plastic part, guaranteeing dimensional accuracy, reducing scrap rate, and meeting the market demand for high-precision plastic products.

[0020] This application introduces a pipe fitting that is installed and fixed via a threaded connection between a fixed connector and a locking sleeve. This method is simple and convenient, facilitating disassembly and maintenance. Furthermore, the inclusion of a limiting ring and a sealing ring not only ensures a tight seal but also limits the connection depth, guaranteeing installation accuracy and reducing the probability of coolant leaks and other malfunctions caused by connection issues.

[0021] The interface at the fixed joint opening of this application can be designed in a form that is common to most pipes, which facilitates connection with different coolant pipes, enhances the applicability of the mold in actual production, and reduces the cost and inconvenience caused by pipe mismatch. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0025] Figure 3 This is a schematic diagram showing the disassembled structure of the mold, mold core, and inlet pipe of this utility model to eliminate hidden lines.

[0026] Figure 4 This is a top sectional view of the fixed mold and mold core of this utility model;

[0027] Figure 5 This is a partial top-view cross-sectional structural diagram of the disassembly point of the fixed mold, mold core, and inlet pipe of this utility model.

[0028] Figure 6 This is a schematic diagram of the pipe fitting introduced in this utility model;

[0029] Figure 7 This is a partial structural diagram of the pipe fitting introduced in this utility model;

[0030] Figure 8 This utility model Figure 4 A magnified structural diagram of point A in the middle.

[0031] Drawing number explanation: 1. Mold frame; 2. Moving mold; 3. Fixed mold; 4. Mold core; 5. Spiral cooling water channel; 6. First flow channel; 601. Second flow channel; 6001. First connecting section; 6002. Second connecting section; 7. Inlet pipe fitting; 8. Fixed joint; 9. Limiting ring; 901. First sealing ring; 902. First sealing ring; 10. Interface; 11. Locking sleeve. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings.

[0033] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0034] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0035] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0036] Please see Figure 1-8 A high-precision injection molding die, comprising:

[0037] A mold frame 1 is provided with a moving mold 2 and a fixed mold 3, and a mold core 4 is provided inside the fixed mold 3.

[0038] The spiral cooling water channel 5 is located inside the mold core 4. The inlet of the spiral cooling water channel 5 is connected to the fixed mold 3 through the first flow channel 6, and the outlet is connected to the fixed mold 3 through the second flow channel 601.

[0039] The inlet pipe 7 is inserted into the corresponding first flow channel 6 and second flow channel 601 to introduce coolant into the spiral cooling water channel 5.

[0040] The high-precision injection molding die of this application is mainly composed of components such as mold frame 1, moving mold 2, fixed mold 3, mold core 4, spiral cooling water channel 5, first flow channel 6, second flow channel 601, and inlet pipe 7. The following is a detailed description of its structure and working principle.

[0041] I. Detailed Structure and Connection Methods of Each Component

[0042] Mold assembly: The moving mold 2 and the fixed mold 3 are mounted on the mold frame 1, and the mold core 4 is installed inside the fixed mold 3. A spiral cooling channel 5 is pre-machined inside the mold core 4. At the same time, a first flow channel 6 and a second flow channel 601 are machined in the fixed mold 3 and the mold core 4. The first flow channel 6 and the second flow channel 601 both include a first connecting section 6001 arranged laterally in the mold core 4 and a second connecting section 6002 arranged laterally in the fixed mold 3. The first connecting section 6001 is connected to the first or last end of the spiral cooling channel 5 and is connected to the second connecting section 6002.

[0043] Installation of inlet fitting 7: Insert inlet fitting 7 into the corresponding opening of the second connecting section 6002, extending it into the interior of the first connecting section 6001. Connect the first end of inlet fitting 7 to a fixing connector 8. Install a locking sleeve 11 on the outer periphery of the opening at the first end of the second connecting section 6002 on the outer wall of the fixed mold 3. By rotating the fixing connector 8, its external thread engages with the internal thread of the locking sleeve 11, fixing the inlet fitting 7 onto the fixed mold 3. A universal interface 10 is provided at the opening of the fixing connector 8 for connecting external coolant pipes. Simultaneously, a first sealing ring 901 and a second sealing ring 902 are respectively fitted at the limiting ring opening 9 on the outer periphery of the fixing connector 8 opening to ensure the sealing of the coolant pipe connection and the connection between the fixing connector 8 and the locking sleeve 11.

[0044] II. Working Principle

[0045] When the injection molding equipment is ready to perform injection molding, the external coolant pipe is first connected to the fixed joint 8 through the universal interface 10. Coolant (water + ethylene glycol) flows through the coolant pipe into the fixed joint 8 under the action of an external power source such as a water pump, and then flows into the inlet pipe 7.

[0046] The coolant is introduced from the second connecting section 6002 through the inlet pipe 7, and then enters the spiral cooling channel 5 inside the mold core 4 after passing through the first connecting section 6001. Since the spiral cooling channel 5 surrounds the mold core 4 in a spiral shape, the coolant can fully exchange heat with the mold core 4 during the flow process, carrying away the heat generated by the mold core 4 during the injection molding process.

[0047] After the coolant completes heat exchange in the spiral cooling water channel 5, it is discharged through the first connecting section 6001 and the second connecting section 6002 at the other end, and then through the corresponding inlet pipe 7, returning to the coolant circulation system to realize the circulation flow of coolant.

[0048] The trapezoidal cross-section design of the spiral cooling water channel 5 makes the flow velocity and flow rate distribution of the coolant more reasonable at different locations during the flow process, which helps to improve heat exchange efficiency. At the same time, the equal longitudinal spacing of adjacent spiral cooling water channels 5 ensures that the coolant flow rate and cooling intensity received by all parts of the mold core 4 are consistent, thereby making the temperature distribution of the mold core 4 uniform.

[0049] Uniform core temperature ensures that the cooling shrinkage of various parts of the plastic part is basically the same during the molding process, avoiding the uneven shrinkage problem caused by uneven cooling in traditional molds, thus ensuring the dimensional accuracy of the plastic part and reducing the generation of scrap.

[0050] The design of the fitting between the inlet pipe 7 and the second connecting section 6002, as well as the threaded connection between the fixed connector 8 and the locking sleeve 11, ensures the stability of the inlet pipe 7 installation. Meanwhile, the limiting ring 9 restricts the connection depth, ensuring accurate installation. The first sealing ring 901 and the second sealing ring 902 respectively ensure the sealing of the coolant pipe connection and the connection between the fixed connector 8 and the locking sleeve 11, preventing coolant leakage and ensuring that the coolant can circulate normally within the designed channel, maintaining the normal operation of the mold cooling system.

[0051] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A high-precision injection compression mold characterized by comprising: The utility model relates to a mould frame (1) is installed with movable mould (2) and fixed mould (3) on it, and the fixed mould (3) is equipped with mould core (4) inside, spiral cold water channel (5) is opened in the mould core (4) inside, and the import of spiral cold water channel (5) is communicated with fixed mould (3) through first flow passage (6), and the export is communicated with fixed mould (3) through second flow passage (601), and the introduction pipe fitting (7) is inserted respectively in the inside of corresponding first flow passage (6) and second flow passage (601) and is used to introduce cooling liquid to spiral cold water channel (5). The front view section of the spiral cold water channel (5) is trapezoidal, and the longitudinal distance of adjacent spiral cold water channels (5) is equal. The first flow passage (6) and the second flow passage (601) each include a first communication section (6001) and a second communication section (6002). The first communication section (6001) is disposed in the mould core (4) in a transverse direction and is connected to the head end or tail end of the spiral cold water channel (5). The second communication section (6002) is disposed in the fixed mould (3) in a transverse direction and is in communication with the first communication section (6001). The introduction pipe fitting (7) is inserted into the first communication section (6001) from the opening of the second communication section (6002). The head end of the introduction pipe fitting (7) is connected to a fixed joint (8). The outer periphery of the opening of the head end of the second communication section (6002) is provided with a locking sleeve (11). The fixed joint (8) and the locking sleeve (11) are connected by screwing.

2. The high-precision injection compression mold according to claim 1, characterized in that: The outer periphery of the opening of the fixed joint (8) is provided with an annular limiting ring (9) for limiting the connection depth of the fixed joint (8) and the locking sleeve (11).

3. The high precision injection molding press mold of claim 1, wherein: An interface (10) is provided at the opening of the fixed joint (8) for connecting to a cooling liquid pipe.

4. The high-precision injection molding press mold according to claim 3, characterized in that: A first sealing ring (901) is sleeved on the outer periphery of one end of the limiting ring (9) close to the cooling liquid pipe for sealing the cooling liquid pipe. A second sealing ring (902) is sleeved on the outer periphery of one end of the limiting ring (9) close to the locking sleeve (11) for sealing the connection between the fixed joint (8) and the locking sleeve (11).

5. The high precision injection molding press mold of claim 4, wherein: The diameter of the fixed joint (8) is greater than the diameter of the introduction pipe fitting (7) and is adapted to the inner diameter of the head end of the second communication section (6002).

6. The high precision injection molding press mold of claim 4, wherein: ​ 7. The high precision injection molding press mold of claim 5, wherein: ​ 8. The high precision injection molding press mold of claim 4, wherein: ​

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