Quick replacement jig for injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a quick replacement jig for an injection mold, which comprises a mold base, a lower mold component, a hydraulic rod, a top plate and an upper mold component, a jig component is mounted on the inner side of the lower mold component, a limiting insertion component is fixedly connected to the inner side of the lower mold component, and the lower mold component comprises a mold shell. A negative pressure groove, a horizontal sliding hole, an annular air channel and a mounting groove are formed in the inner side of the mold shell, a first sealing ring is fixedly connected to the inner side of the negative pressure groove, an electromagnetic valve and a high-pressure fan are fixedly connected to the inner side of the mounting groove, the jig assembly comprises an injection mold body, and anti-disengaging insertion holes are formed in the front end and the rear end of the injection mold body; according to the device, the traditional mode that bolts are disassembled one by one is avoided, tools are not needed, the labor intensity is reduced, the replacement efficiency is improved, the mold installation precision is ensured, and the device is suitable for the production environment of frequent mold replacement.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a quick-change fixture for injection molds. Background Technology

[0002] A quick-change fixture for injection molds is a device or system specifically designed for quick mold changes on injection molding machines. By optimizing the loading, unloading, positioning, and fixing of molds, it significantly shortens mold changeover time and improves production efficiency. This fixture typically employs technologies such as hydraulic clamping, magnetic locking, modular design, and automated control to achieve rapid mold locking and unlocking, automatic centering and guiding, as well as standardized mold bases and quick-change module interfaces. Its core purpose is to reduce equipment downtime, adapt to the needs of multi-variety, small-batch production, and reduce manual intervention and operational difficulty.

[0003] In traditional injection mold replacement processes, it is usually necessary to manually disassemble and install multiple bolts one by one to fix the mold. Operators must use tools such as wrenches for manual operation. This method of work is not only labor-intensive but also inefficient. Especially in production environments where molds need to be changed frequently, operators are prone to fatigue from repeating this high-intensity physical labor for a long time. This fatigue not only leads to a decrease in work efficiency but may also affect the accuracy of operation, thereby increasing the risk of mold installation errors and ultimately adversely affecting production progress and product quality. Therefore, a quick change fixture for injection molds is proposed to address the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a quick change fixture for injection molds, in order to solve the problem that in the traditional process of changing injection molds, it is usually necessary to manually disassemble and install multiple bolts one by one to complete the mold fixing work. Operators must use tools such as wrenches to perform manual operations. This working method is not only labor-intensive, but also inefficient, especially in production environments where molds need to be changed frequently.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A quick-change fixture for injection molds includes a mold base, a lower mold assembly, a hydraulic rod, a top plate, and an upper mold assembly. The fixture assembly is mounted inside the lower mold assembly. A limit-positioning connector is fixedly connected inside the lower mold assembly. The lower mold assembly includes a mold shell. The inner side of the mold shell has a negative pressure groove, a horizontal sliding hole, an annular air passage, and a mounting groove. A first sealing ring is fixedly connected inside the negative pressure groove. A solenoid valve and a high-pressure blower are fixedly connected inside the mounting groove. The fixture assembly includes an injection mold body. Anti-detachment insertion holes are provided at both the front and rear ends of the injection mold body. A pin is inserted into each anti-detachment insertion hole. A folded plate is fixedly connected to one side of each pin. A column is fixedly connected to the bottom of the folded plate. An expansion insertion hole is provided inside the column. The column is inserted into the inner side of the negative pressure groove. The outer side of the folded plate is in close contact with the inner side of the mold shell.

[0007] As a further optimization of this utility model, the following features are provided: a lower mold assembly and a hydraulic rod are fixedly connected to the top of the mold base; a top plate is fixedly connected to the bottom of the hydraulic rod; an upper mold assembly is fixedly connected to the bottom of the top plate; the structural arrangement of the upper mold assembly is the same as that of the lower mold assembly; there is one hydraulic rod; and a telescopic rod is fixed between the mold base and the top plate.

[0008] As a further optimization of this utility model, the limiting insertion assembly includes a spring, a slide plate is fixedly connected to one side of the spring, a limiting insertion rod is fixedly connected to the side of the slide plate away from the spring, and a second sealing ring is fixedly connected to the outer side of the slide plate.

[0009] As a further optimization of this utility model, one end of the spring is fixedly connected to the inner side of the horizontal sliding hole, the horizontal sliding hole penetrates the outer side of the mold shell, the outer side of the second sealing ring is in contact with the inner side of the horizontal sliding hole, the limiting rod is inserted into the inner side of the expansion hole, the outer side of the limiting rod is in contact with the inner side of the expansion hole, and the end of the expansion hole near the limiting rod has a flared structure.

[0010] As a further optimization of this utility model, the lower end of the injection mold body is provided with two folded plates, the folded plates are L-shaped, the anti-detachment insertion hole penetrates one end of the injection mold body, the anti-detachment insertion hole is a flared structure, and the number of insertion posts is the same as the number of anti-detachment insertion holes.

[0011] As a further optimization of this utility model, the outer side of the column is fitted with the inner side of the first sealing ring, the first sealing ring is located at the upper end of the expansion hole, the number of negative pressure grooves is the same as the number of columns, and a gap is provided between the inner side of the negative pressure groove and the outer side of the column.

[0012] As a further optimization of this utility model, the negative pressure groove penetrates the upper end of the mold shell, the negative pressure groove is connected to the annular air passage, the annular air passage is connected to the mounting groove, and the mounting groove penetrates the right end of the mold shell.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In this invention, the device, through the setting of a lower mold assembly, a fixture assembly, and a limiting plug-in assembly, adopts the principle of negative pressure and automatic control for quick fixture replacement. This avoids the traditional method of disassembling bolts one by one, eliminates the need for tools, reduces the labor intensity of workers, improves replacement efficiency, and ensures the installation accuracy of the mold after replacement, thereby ensuring the quality of subsequent production. It is particularly suitable for production environments where molds are frequently changed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the upper mold assembly structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the lower mold assembly structure of this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the fixture assembly of this utility model;

[0019] Figure 5 This is a cross-sectional structural diagram of the folded plate of this utility model;

[0020] Figure 6 This is a cross-sectional structural diagram of the mold shell of this utility model;

[0021] Figure 7 This is a schematic diagram of the solenoid valve structure of this utility model;

[0022] Figure 8 This is a schematic diagram of the mounting groove structure of this utility model;

[0023] Figure 9 This is a schematic diagram of the high-pressure blower structure of this utility model;

[0024] Figure 10 This is a schematic diagram of the limiting plug-in assembly structure of this utility model.

[0025] In the picture: 1. Mold base;

[0026] 2. Lower mold assembly; 21. Mold shell; 22. Negative pressure groove; 23. First sealing ring; 24. Horizontal sliding hole; 25. Annular air passage; 26. Mounting groove; 27. Solenoid valve; 28. High-pressure blower;

[0027] 3. Hydraulic rod; 4. Top plate; 5. Upper mold assembly;

[0028] 6. Fixture assembly; 61. Injection mold body; 62. Anti-detachment insertion hole; 63. Insertion post; 64. Folding plate; 65. Column; 66. Expansion insertion hole;

[0029] 7. Limiting insertion assembly; 71. Spring; 72. Limiting insertion rod; 73. Slide plate; 74. Second sealing ring. Detailed Implementation

[0030] 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.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] Please see Figure 1-10 This utility model provides a technical solution:

[0033] A quick-change fixture for injection molds includes a mold base 1, a lower mold assembly 2, a hydraulic rod 3, a top plate 4, and an upper mold assembly 5. A fixture assembly 6 is installed inside the lower mold assembly 2, and a limit plug-in assembly 7 is fixedly connected to the inner side of the lower mold assembly 2. The lower mold assembly 2 includes a mold shell 21, and the inner side of the mold shell 21 has a negative pressure groove 22, a horizontal sliding hole 24, an annular air passage 25, and a mounting groove 26. A first sealing ring 23 is fixedly connected to the inner side of the negative pressure groove 22, and the mounting groove... The inner side of the 26 is fixedly connected to a solenoid valve 27 and a high-pressure blower 28. The fixture assembly 6 includes an injection mold body 61. The front and rear ends of the injection mold body 61 are provided with anti-detachment insertion holes 62. Insertion posts 63 are inserted into the anti-detachment insertion holes 62. A folded plate 64 is fixedly connected to one side of the insertion post 63. A column 65 is fixedly connected to the bottom end of the folded plate 64. An expansion insertion hole 66 is provided on the inner side of the column 65. The column 65 is inserted into the inner side of the negative pressure groove 22. The outer side of the folded plate 64 is in close contact with the inner side of the mold shell 21.

[0034] As a further implementation of this solution, the top of the mold base 1 is fixedly connected to the lower mold assembly 2 and the hydraulic rod 3. The bottom of the hydraulic rod 3 is fixedly connected to the top plate 4. The bottom of the top plate 4 is fixedly connected to the upper mold assembly 5. The structural arrangement of the upper mold assembly 5 is the same as that of the lower mold assembly 2. There is one hydraulic rod 3. A telescopic rod is fixed between the mold base 1 and the top plate 4. Through the above settings, the modular connection of the mold assembly is realized, which facilitates quick disassembly and assembly, improves the efficiency of mold replacement, and ensures the stability and reliability of the structure.

[0035] As a further implementation of this solution, the limiting insertion assembly 7 includes a spring 71. A slide plate 73 is fixedly connected to one side of the spring 71. A limiting insertion rod 72 is fixedly connected to the side of the slide plate 73 away from the spring 71. A second sealing ring 74 is fixedly connected to the outside of the slide plate 73. One end of the spring 71 is fixedly connected to the inside of the horizontal sliding hole 24. The horizontal sliding hole 24 penetrates the outside of the mold housing 21. The outside of the second sealing ring 74 fits against the inside of the horizontal sliding hole 24. The limiting insertion rod 72 is inserted into the inside of the expansion insertion hole 66. The outside of the limiting insertion rod 72 fits against the inside of the expansion insertion hole 66. The end of the expansion insertion hole 66 near the limiting insertion rod 72 has a flared structure. Through the above settings, the flared structure and sealing design can quickly realize the insertion and positioning of the mold, while preventing gas leakage, ensuring the effective operation of the negative pressure system, further improving the efficiency and reliability of mold replacement, and improving the stability and accuracy of mold replacement.

[0036] As a further implementation of this solution, two folded plates 64 are provided at the lower end of the injection mold body 61. The folded plates 64 are L-shaped. Anti-detachment insertion holes 62 penetrate one end of the injection mold body 61. The anti-detachment insertion holes 62 have a flared structure. The number of insertion pins 63 is the same as the number of anti-detachment insertion holes 62. Through the above settings, the L-shaped folded plates 64 and the flared structure anti-detachment insertion holes 62 facilitate the quick alignment and installation of the mold, reduce the complexity of manual operation, improve the speed and accuracy of mold replacement, and reduce the difficulty of operation.

[0037] As a further implementation of this solution, the outer side of the column 65 is fitted with the inner side of the first sealing ring 23, and the first sealing ring 23 is located at the upper end of the expansion hole 66. The number of negative pressure grooves 22 is the same as the number of columns 65. A gap is provided between the inner side of the negative pressure groove 22 and the outer side of the column 65. The negative pressure groove 22 penetrates the upper end of the mold shell 21 and is connected to the annular air passage 25. The annular air passage 25 is connected to the mounting groove 26, and the mounting groove 26 penetrates the right end of the mold shell 21. Through the above settings, it can be ensured that the mold fits tightly under negative pressure. At the same time, the gap design avoids excessive compression and ensures free flow of gas at the lower end of the first sealing ring 23. This achieves rapid response and efficient operation of the negative pressure system, enabling rapid mold fixing and release, significantly shortening mold change time and improving production efficiency.

[0038] Workflow: To achieve rapid mold replacement, the mold is first disassembled. The solenoid valve 27 is opened via the existing controller. At this time, the external through-hole enters the mounting groove 26 and the annular air passage 25 through the high-pressure blower 28, and then enters the negative pressure groove 22 through the annular air passage 25. Under the action of the spring 71, the spring 71 pulls the slide plate 73 and the limiting rod 72, causing the limiting rod 72 to slide out from the expansion hole 66 and retract into the horizontal sliding hole 24. Simultaneously, the gas inside the horizontal sliding hole 24 flows out, and the horizontal sliding... The through-hole 24 structure maintains a constant pressure inside the horizontal sliding hole 24. The second sealing ring 74 seals the sliding plate 73 and the mold housing 21, preventing gas from escaping between them. At this point, the folding plate 64 can be pulled out from inside the mold housing 21. The folding plate 64 drives the column 65 out of the negative pressure groove 22. When the folding plate 64 and the injection mold body 61 are far away from the inside of the mold housing 21, the two folding plates 64 are separated, so that the insert 63 is far away from the inside of the anti-detachment insertion hole 62.

[0039] During assembly, install the injection mold body 61 that needs to be replaced. Align the anti-detachment insertion hole 62 of the injection mold body 61 with the insertion post 63, inserting the two insertion posts 63 into the anti-detachment insertion hole 62. Then align and fit the two folded plates 64 together. Align the uprights 65 with the negative pressure grooves 22 respectively, inserting the uprights 65 into the negative pressure grooves 22, so that the folded plates 64 are installed inside the mold shell 21, fitting snugly against the inside of the mold shell 21. Start the high-pressure blower 28 to evacuate air from the mounting groove 26 and the annular air passage 25. At this time, a negative pressure is generated inside the negative pressure groove 22. Under the action of the negative pressure, the uprights 65 can be kept moving downward, thereby ensuring the installation of the folded plates 64 and the mold shell 21. When the negative pressure is generated inside the negative pressure groove 22, the limiting rod 72 drives the sliding plate 73 to move into the negative pressure groove 22. The sliding plate 73 pulls the spring 71, and the spring 71 deforms. External air enters the horizontal sliding hole 24. At this time, the limiting rod 72 is inserted into the column 65, thereby limiting the column 65 and preventing the column 65 from detaching from the mold shell 21. After the high pressure blower 28 has been running for a certain period of time, the solenoid valve 27 is closed by the existing controller and the high pressure blower 28 is turned off. At this time, the negative pressure groove 22 is kept in a negative pressure state, which plays the role of positioning the limiting rod 72. Then, the upper mold assembly 5 is replaced according to the above principle to complete the replacement work.

[0040] Based on the above principles, when replacing injection molds, the device avoids the traditional method of disassembling bolts one by one. This replacement method does not require the use of tools, reduces the labor intensity of workers, improves replacement efficiency, and is suitable for production environments where molds are frequently changed. At the same time, it can ensure the installation accuracy of the replaced mold and ensure the quality of subsequent production.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A quick change tooling for injection moulds comprising a mould base (1), a lower mould assembly (2), a hydraulic ram (3), a top plate (4) and an upper mould assembly (5), characterised in that: A jig assembly (6) is mounted inside the lower mold assembly (2), and a limiting plug-in assembly (7) is fixedly connected to the inside of the lower mold assembly (2); The lower mold assembly (2) comprises a mold shell (21), and a negative pressure groove (22), a horizontal sliding hole (24), an annular air channel (25) and a mounting groove (26) are formed in the inside of the mold shell (21), a first sealing ring (23) is fixedly connected to the inside of the negative pressure groove (22), and an electromagnetic valve (27) and a high-pressure fan (28) are fixedly connected to the inside of the mounting groove (26); The jig assembly (6) comprises an injection mold body (61), and a anti-loose plug hole (62) is formed in the front end and the rear end of the injection mold body (61), a plug column (63) is inserted into the anti-loose plug hole (62), a zigzag plate (64) is fixedly connected to one side of the plug column (63), and a stand column (65) is fixedly connected to the bottom end of the zigzag plate (64), and an expansion plug hole (66) is formed in the inside of the stand column (65). The stand column (65) is inserted into the inside of the negative pressure groove (22), and the outside of the zigzag plate (64) is tightly attached to the inside of the mold shell (21).

2. The quick change tooling for an injection mold of claim 1, wherein: The top end of the mold base (1) is fixedly connected with the lower mold assembly (2) and the hydraulic rod (3), the bottom end of the hydraulic rod (3) is fixedly connected with the top plate (4), the bottom end of the top plate (4) is fixedly connected with the upper mold assembly (5), and the structure arrangement of the upper mold assembly (5) is the same as that of the lower mold assembly (2).

3. The quick change tooling for an injection mold of claim 1, wherein: The limiting plug-in assembly (7) comprises a spring (71), one side of the spring (71) is fixedly connected with a sliding disc (73), the side, away from the spring (71), of the sliding disc (73) is fixedly connected with a limiting plug rod (72), and the outside of the sliding disc (73) is fixedly connected with a second sealing ring (74).

4. The quick change tooling for an injection mold of claim 3, wherein: One end of the spring (71) is fixedly connected to the inside of the horizontal sliding hole (24), the horizontal sliding hole (24) penetrates through the outside of the mold shell (21), the outside of the second sealing ring (74) is tightly attached to the inside of the horizontal sliding hole (24), the limiting plug rod (72) is inserted into the inside of the expansion plug hole (66), the outside of the limiting plug rod (72) is tightly attached to the inside of the expansion plug hole (66), and one end of the expansion plug hole (66), close to the limiting plug rod (72), is of an expanding structure.

5. The quick change tooling for an injection mold of claim 1, wherein: The lower end of the injection mold body (61) is provided with two zigzag plates (64), the shape of the zigzag plate (64) is L-shaped, the anti-loose plug hole (62) penetrates through one end of the injection mold body (61), the anti-loose plug hole (62) is of an expanding structure, and the number of the plug columns (63) is the same as that of the anti-loose plug holes (62).

6. The quick change tooling for an injection mold of claim 1, wherein: The outside of the stand column (65) is tightly attached to the inside of the first sealing ring (23), the first sealing ring (23) is located at the upper end of the expansion plug hole (66), the number of the negative pressure grooves (22) is the same as that of the stand columns (65), and a spacing is arranged between the inside of the negative pressure groove (22) and the outside of the stand column (65).

7. The quick change tooling for an injection mold of claim 1, wherein: The negative pressure groove (22) penetrates the upper end of the mold shell (21), the negative pressure groove (22) communicates with the annular air channel (25), the annular air channel (25) communicates with the mounting groove (26), and the mounting groove (26) penetrates the right end of the mold shell (21).

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