Injection mold with insert facilitating replacement
By setting an installation groove at the bottom of the mold and designing a replacement mechanism on the insert, combined with guide holes and installation holes, the problem of inconvenient insert replacement in existing molds is solved, enabling quick disassembly and assembly and stable installation of inserts, thus improving the convenience and flexibility of the mold.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI PAIYA PRECISION MOULD CO LTD
- Filing Date
- 2025-08-25
- Publication Date
- 2026-07-24
AI Technical Summary
The existing injection mold requires disassembly of the lower mold when changing inserts, which makes the replacement inconvenient and affects the ease of use and flexibility.
The bottom of the mold is equipped with an installation groove and a replacement mechanism on the insert, including a bottom opening, insertion hole, insertion rod, upright plate, bolt and reinforcing plate. The insert can be installed or removed by rotating the bolt. The design of guide hole, center hole and mounting hole can achieve stable installation and quick disassembly of the insert.
It enables quick assembly and disassembly of inserts, saves time on mold mounting and dismounting, improves the convenience and flexibility of molds, and ensures the precise construction and auxiliary function of inserts in molds.
Smart Images

Figure CN224545179U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of injection molds, and more particularly to an injection mold that facilitates the replacement of inserts. Background Technology
[0002] Inserts are a technical term in mold manufacturing, specifically referring to irregularly shaped components embedded inside a mold. Their core functions include mold plate positioning, gap filling, and assisting in the coordinated operation of the molding system. In injection molds, inserts, through their cooperation with the mold plate, achieve the precise construction of the plastic part's molding cavity, while also undertaking auxiliary functions such as runner guidance and cold material storage. Inserts manufactured using precision processes such as electrical discharge machining (EDM) and wire cutting must meet strict dimensional tolerance requirements, and their surface roughness values are typically controlled within a low range.
[0003] In the production and use of existing molds, it is usually necessary to frequently change inserts of different specifications. The existing replacement method often requires the mold to be removed from the mold before the insert can be replaced, which makes the replacement inconvenient and affects the convenience and flexibility of the injection mold. Therefore, there is a need for an injection mold that makes it easy to replace inserts. Utility Model Content
[0004] To improve the convenience and flexibility of changing inserts in molds, this application provides an injection mold that facilitates insert replacement.
[0005] The technical solution of the injection mold for easy replacement of inserts provided in this application is as follows: An injection mold for easy replacement of inserts includes a mold, the bottom of which is provided with an installation groove, an insert is provided in the installation groove, and a replacement mechanism is provided on the insert;
[0006] The replacement mechanism includes multiple bottom openings on the insert, one of which contains an installation component. The top inner wall of the installation groove has multiple corresponding insertion holes, each containing multiple insertion rods and a vertical plate. The insertion rods and the vertical plate are located within the installation component. The insert has two symmetrical fixing holes, each containing a corresponding bolt. A reinforcing plate is slidably fitted onto the bolt.
[0007] By adopting the above technical solution, the bolt can be rotated and moved outward, thereby allowing for disassembly and assembly. This releases the positioning and installation of the insert, and allows for direct disassembly and assembly operations outside the mold. Therefore, it saves time on the upper and lower molds, further improving the convenience and flexibility of use. The insert, through its cooperation with the mold, achieves the precise construction of the plastic part molding cavity, while also undertaking auxiliary functions such as guiding the runner and storing cold material.
[0008] Preferably, the mold has multiple guide holes symmetrically formed on it, and there are four guide holes distributed around the mold.
[0009] By adopting the above technical solution, the guide hole can serve as a guide for installation and movement.
[0010] Preferably, the mold has multiple strip-shaped openings and corresponding center holes.
[0011] By adopting the above technical solution and setting a central hole, an auxiliary installation function can be achieved.
[0012] Preferably, the mold has multiple first mounting holes.
[0013] By adopting the above technical solution, the first mounting hole can be set to assist in installation and fixation.
[0014] Preferably, the bottom of the mold is provided with a plurality of corresponding second mounting holes and third mounting holes.
[0015] By adopting the above technical solution, the second and third mounting holes can be provided to assist in the installation.
[0016] Preferably, there are four second mounting holes, which are symmetrically arranged on both sides.
[0017] By adopting the above technical solution, and by setting four second mounting holes symmetrically on both sides, the stability and firmness after installation can be further improved.
[0018] Preferably, the mold has corresponding round holes on both sides.
[0019] By adopting the above technical solution, the circular holes can be used to assist in installation and positioning.
[0020] In summary, this application includes at least one of the following beneficial technical effects:
[0021] 1. This application utilizes the cooperation of mounting grooves, etc., to rotate bolts, which can rotate and move outwards, thereby allowing for disassembly and assembly. This releases the positioning and installation of inserts, and allows for direct disassembly and assembly operations outside the mold. Therefore, it can save time for upper and lower molds, and further improve the convenience and flexibility of use.
[0022] 2. This application utilizes the cooperation of a bottom opening, etc., to further install and use the insert through the bottom opening and mounting components. The guide hole serves to guide the installation movement, the first mounting hole and the second mounting hole serve to assist in the installation, and the reinforcing plate further improves the stability and firmness of the positioning installation. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of an injection mold that facilitates the replacement of inserts, according to an embodiment of this application.
[0024] Figure 2 This is a schematic diagram illustrating the bottom structure of an injection mold for easy replacement of inserts, as described in an embodiment of this application.
[0025] Figure 3 This is a partial unfolded schematic diagram of the bottom structure of an injection mold for easy replacement of inserts, as described in an embodiment of this application.
[0026] Figure 4 This is a schematic diagram illustrating the fixed part of the disassembly and assembly structure, which is the main feature of this application embodiment;
[0027] Reference numerals: 1. Mold; 2. Guide hole; 3. Strip opening; 4. Center hole; 5. First mounting hole; 6. Second mounting hole; 7. Mounting groove; 8. Insert; 9. Bottom opening; 10. Mounting component; 11. Fixing hole; 12. Insertion hole; 13. Third mounting hole; 14. Insert rod; 15. Vertical plate; 16. Bolt; 17. Reinforcing plate; 18. Round hole. Detailed Implementation
[0028] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.
[0029] This application discloses an injection mold that facilitates the replacement of inserts.
[0030] Reference Figure 1-3 An injection mold for easy replacement of inserts includes a mold 1, which is a prior art in the field, so its specific structure and usage process are not described in detail. The bottom of the mold 1 is provided with an installation groove 7, which can play an auxiliary role in installation. An insert 8 is provided in the installation groove 7, which is a prior art product in the field, so its specific structure and usage process are not described in detail. A replacement mechanism is provided on the insert 8.
[0031] The replacement mechanism includes multiple bottom openings 9 on the insert 8. The bottom openings 9 facilitate installation. One of the bottom openings 9 contains an installation component 10. The top inner wall of the installation groove 7 has multiple corresponding insertion holes 12. The insertion holes 12 contain multiple insertion rods 14 and a vertical plate 15. The insertion holes 12 allow the insertion rods 14 to be installed inside, which facilitates auxiliary injection molding.
[0032] The insert 14 and the upright plate 15 are located inside the mounting component 10. The mounting component 10 is existing technology in this field, so the specific internal structure and installation process are not described in detail. The insert 8 has two symmetrical fixing holes 11, which can be used to assist in the installation. Each fixing hole 11 is equipped with a corresponding bolt 16, which can be used to fix the installation and facilitate disassembly and assembly. A reinforcing plate 17 is slidably fitted on the bolt 16, which can further improve the stability and firmness during positioning and installation. The insert 8, through cooperation with the mold 1, realizes the precise construction of the plastic part molding cavity, and at the same time undertakes auxiliary functions such as guiding the flow channel and storing cold material.
[0033] When it is necessary to disassemble the insert 8 at the bottom of the mold 1, the bolt 16 can be rotated and moved outward, thereby allowing for disassembly and assembly. This releases the positioning and installation of the insert 8, and allows for direct disassembly and assembly operations outside the mold 1. This saves time on the upper and lower molds and further improves the convenience and flexibility of use.
[0034] Reference Figure 3-4 The replacement mechanism also includes multiple guide holes 2 on the mold 1. By setting the guide holes 2, it can play a role in assisting the installation and guiding movement. There are four guide holes 2 distributed around the mold 1. The mold 1 has multiple strip-shaped openings 3 and corresponding center holes 4. By setting the center holes 4, it can play a role in assisting the installation. The mold 1 has multiple first mounting holes 5. The bottom of the mold 1 has multiple corresponding second mounting holes 6 and third mounting holes 13. The second mounting holes 6 and third mounting holes 13 are the same size. There are four second mounting holes 6, which are symmetrically arranged on both sides. The mold 1 has corresponding round holes 18 on both sides. By setting the round holes 18, it can play a role in assisting the installation and positioning.
[0035] In use, the insert 8 can be assisted in installation through the mounting slot 7, and the insert 8 can be further installed and used through the bottom opening 9 and the mounting component 10. The guide hole 2 can be used to guide the installation and move the insert. The first mounting hole 5 and the second mounting hole 6 can be used to assist in installation. The reinforcing plate 17 can further improve the stability and firmness of the positioning installation.
[0036] The implementation principle of an injection mold that facilitates the replacement of inserts in this application embodiment is as follows: When it is necessary to disassemble the insert 8 at the bottom of the mold 1, the bolt 16 is rotated and can be moved outward, thereby allowing it to be disassembled and installed. This releases the positioning installation of the insert 8, and the disassembly and installation can be performed directly outside the mold 1. Therefore, it can save the time of mold raising and lowering, and further improve the convenience and flexibility of use.
[0037] The insert 8 can be assisted in installation through the mounting groove 7, and can be further installed and used through the bottom opening 9 and the mounting component 10. The guide hole 2 can be used for installation guidance and movement. The first mounting hole 5 and the second mounting hole 6 can be used for auxiliary installation. The reinforcing plate 17 can further improve the stability and firmness of the positioning installation. The insert 8 achieves the precise construction of the plastic part molding cavity through cooperation with the mold 1, and at the same time undertakes auxiliary functions such as guiding the runner and storing cold material.
[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An injection mold for easy replacement of inserts, comprising a mold (1), characterized in that: The bottom of the mold (1) is provided with an installation groove (7), and an insert (8) is provided in the installation groove (7). The insert (8) is provided with a replacement mechanism. The replacement mechanism includes multiple bottom openings (9) on the insert (8), one of which is provided with an installation component (10). The top inner wall of the installation groove (7) is provided with multiple corresponding insertion holes (12). Multiple insertion rods (14) and a vertical plate (15) are provided in the insertion holes (12). The insertion rods (14) and the vertical plate (15) are located in the installation component (10). Two fixing holes (11) are symmetrically opened on the insert (8). Each of the two fixing holes (11) is provided with a corresponding bolt (16). A reinforcing plate (17) is slidably sleeved on the bolt (16).
2. The injection mold for easy replacement of inserts according to claim 1, characterized in that: The mold (1) has a plurality of guide holes (2) symmetrically opened on it. There are four guide holes (2) distributed around the mold (1).
3. The injection mold for easy replacement of inserts according to claim 1, characterized in that: The mold (1) has multiple slots (3) and corresponding center holes (4).
4. The injection mold for easy replacement of inserts according to claim 1, characterized in that: The mold (1) has multiple first mounting holes (5).
5. The injection mold for easy replacement of inserts according to claim 1, characterized in that: The bottom of the mold (1) is provided with a plurality of corresponding second mounting holes (6) and third mounting holes (13).
6. The injection mold for easy replacement of inserts according to claim 5, characterized in that: The second mounting hole (6) is set in four parts, and is symmetrically set on both sides.
7. The injection mold for easy replacement of inserts according to claim 1, characterized in that: The mold (1) has corresponding round holes (18) on both sides.