A high precision press

Abstract

This application relates to the field of machining, and in particular to a high-precision vulcanizing machine with a mold-closing mechanism. The machine includes a frame, a lower mold base and a lower mold on the frame, and an upper mold base and an upper mold located above the lower mold on the frame. The upper mold is connected to a drive assembly. The upper mold base has a plug-in block on its side wall, and the lower mold base has a slot for the plug-in block to be inserted into its side wall. An automatic locking assembly is present at the connection between the upper and lower molds. The plug-in block and the inner wall of the slot have heat-insulating pads. The automatic locking assembly includes a horizontally sliding locking rod. The upper mold has a locking groove, and the upper mold base has a pressure rod. The locking rod is L-shaped with a beveled end. The lower mold base has a positioning seat, and the locking rod has a guide post and a return spring. The upper mold base has a material-pressing cylinder. The drive assembly includes a hydraulic cylinder and a guide shaft. This application achieves the technical effects of reducing displacement caused by thermal expansion and contraction during vulcanization, improving mold-closing precision, preventing heat damage to the plug-in block and the inner wall of the slot, and realizing automatic locking and unlocking for stable connection.

Description

[0001] A high-precision vulcanizing machine Technical Field

[0002] This application relates to the field of machining, and in particular to a high-precision vulcanizing machine. Background Technology

[0003] In numerous industrial sectors, such as rubber and plastic products, the development of vulcanizing machines is crucial. With continuous industrial advancements, vulcanizing machines apply high temperatures and pressures to molds, causing materials like rubber or plastics to undergo vulcanization and molding. This allows for the production of various products meeting specific specifications, satisfying the substantial demands of different industries and driving the development of related sectors. Furthermore, as modern industry demands ever-increasing product precision, the role of vulcanizing machines in production becomes increasingly critical. Their performance directly impacts the quality and market competitiveness of the final product, playing a vital role in the improvement and upgrading of the entire industrial system.

[0004] Currently, the industry employs several thermal compensation techniques to address the impact of heat on vulcanizing machines during operation. One common approach is based on preset fixed compensation values. This involves reserving compensation space in advance during the vulcanizing machine design phase, considering factors such as the mold's installation position. For example, engineers might refer to past usage of similar vulcanizing machines and estimate the approximate coefficient of thermal expansion to determine the size of the reserved space to accommodate potential thermal expansion. Another common method is to set fixed compensation parameters in the control system to adjust the mold closing action. Through programming, the vulcanizing machine adjusts its mold closing action according to preset parameters during operation. Both of these methods are widely used in the industry to address the impact of thermal expansion on vulcanizing machines.

[0005] However, existing thermal compensation techniques based on preset fixed compensation values ​​have significant drawbacks. Various factors, such as different vulcanization processes, mold materials, and actual production environment temperatures, can cause substantial differences in the actual thermal expansion of the vulcanizing machine. Fixed compensation values ​​are difficult to accurately match actual thermal expansion displacement changes, failing to effectively ensure that mold closing accuracy remains at an ideal state, which may consequently affect the quality of the final product. Utility Model Content

[0006] The purpose of this application is to overcome the above-mentioned technical problems and provide a high-precision vulcanizing machine. A high-precision vulcanizing machine includes a frame, a lower mold base on the frame, a lower mold on the lower mold base, an upper mold base above the lower mold on the frame, an upper mold at the bottom of the upper mold base, a drive assembly connected to the upper mold base for driving the upper mold base to move up and down, a plug-in block fixedly connected to the side wall of the upper mold base, a slot provided on the side wall of the lower mold base for the plug-in block to be inserted, and an automatic locking assembly provided at the connection between the upper mold and the lower mold.

[0007] By adopting the above technical solution, when the user uses the drive component to drive the upper mold base and the upper mold to move downward to close the mold, the plug block is inserted into the plug slot for locking and fixing. The automatic locking component automatically locks the upper mold and the lower mold, reducing displacement caused by thermal expansion and contraction during vulcanization and improving the mold closing accuracy.

[0008] Preferably, both the plug block and the inner wall of the slot are fixedly connected with heat insulation pads.

[0009] By adopting the above technical solution, the heat insulation pad can reduce the damage to the plug block and the inner wall of the slot caused by the heat emitted from the upper and lower molds when the user uses it.

[0010] Preferably, the automatic locking assembly includes a locking rod that is horizontally slidably connected to the lower mold base, a locking groove is provided on the side wall of the upper mold, and a pressing rod extending downward is provided on the upper mold base, the pressing rod being used to press the locking rod into the locking groove.

[0011] By adopting the above technical solution, when the upper mold closes downwards, the clamping rod pushes the locking rod to slide into the locking groove, so that the locking rod is inserted into the locking groove, thereby locking the upper mold and the lower mold and reducing the movement of the upper mold and the lower mold due to thermal expansion and contraction.

[0012] Preferably, the locking rod is L-shaped, with an inclined surface at the end of the locking rod and a mating surface that cooperates with the inclined surface in the locking groove.

[0013] By adopting the above technical solution, when the user uses the inclined surface and the mating surface, the locking rod can be easily engaged in the voice locking groove. The locking rod is L-shaped, which can increase the contact area between the locking rod and the upper mold, making the connection between the locking rod and the upper mold more stable.

[0014] Preferably, a positioning seat is fixedly connected to the lower mold base, a guide post is fixedly connected to the locking rod, the guide post is horizontally slidably connected to the positioning seat, and a return spring is sleeved on the guide post.

[0015] By adopting the above technical solution, when the upper mold base drives the clamping rod to slide upward, the pressure of the clamping rod on the locking rod disappears, and the tension of the return spring drives the locking rod to slide away from the upper mold base, so that the locking rod automatically disengages from the locking groove.

[0016] Preferably, a pressing cylinder is fixedly connected to the upper mold base. The pressing cylinder is vertically arranged, and a connecting rod is fixedly connected to the bottom of the pressing cylinder. The two ends of the connecting rod are connected and fixed to the clamping rod. A clearance groove is opened on the upper mold base corresponding to the position of the clamping rod.

[0017] By adopting the above technical solution, when the user uses the material pressing cylinder, the piston rod extends and pushes the pressing rod downward, which in turn pushes the locking rod to slide towards the locking groove and insert it into the locking groove, thus achieving automatic fixation. When the piston rod of the material pressing cylinder retracts, it is easy for the locking rod and the locking groove to automatically unlock and separate, which facilitates the separation of the upper mold and the lower mold.

[0018] Preferably, the drive assembly includes a hydraulic cylinder fixedly connected to the top of the frame, the piston rod of the hydraulic cylinder is vertically downward and fixedly connected to the top of the upper mold base, a guide shaft is fixedly connected to the upper mold base, the guide shaft is vertically arranged, and the guide shaft is slidably connected to the frame.

[0019] By adopting the above technical solution, when the user uses the hydraulic cylinder, the piston rod extends or retracts, driving the upper mold base and the lower mold base to move downward or upward, thereby realizing the closing and separation of the upper and lower molds. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a cross-sectional view of an embodiment of this application; Figure 3 This is a cross-sectional view made to highlight the auto-lock component.

[0021] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Lower mold base; 12. Upper mold base; 13. Upper mold; 14. Lower mold; 15. Drive assembly; 151. Hydraulic cylinder; 152. Guide shaft; 16. Insert block; 17. Slot; 18. Heat insulation pad; 2. Automatic locking assembly; 20. Locking groove; 21. Locking rod; 22. Pressing rod; 23. Positioning seat; 24. Guide column; 25. Return spring; 26. Material pressing cylinder; 261. Connecting rod; 27. Relief groove. Detailed Implementation

[0022] The following will be combined with the appendix Figure 1-3 The technical solutions in the embodiments of this utility model are described in further detail below. The described embodiments are only possible technical implementations of this utility model, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are also within the protection scope of this utility model.

[0023] This application mainly adopts the setting of plug-in blocks, slots and automatic locking components to reduce the displacement caused by thermal expansion and contraction during vulcanization and improve the mold closing accuracy. The following is a further detailed description of this application.

[0024] This application provides a high-precision vulcanizing machine, including a frame 1, a lower mold base 11, an upper mold base 12, an upper mold 13, a lower mold 14, a drive assembly 15, a plug-in block 16, a slot 17, and an automatic locking assembly 2. The lower mold base 11 is mounted on the frame 1, and the upper mold base 12 is located above it and driven to move up and down by the drive assembly 15. The plug-in block 16 on the side wall of the upper mold base 12 can engage with the slot 17 on the side wall of the lower mold base 11. The automatic locking assembly 2 is located at the connection between the upper mold 13 and the lower mold 14. This structural design reduces displacement caused by thermal expansion and contraction during vulcanization, improving mold closing accuracy. Because the engagement of the plug-in block 16 and the slot 17 provides initial positioning and fixation, the automatic locking assembly 2 further locks the upper mold 13 and the lower mold 14, ensuring that even with thermal expansion and contraction during vulcanization, the upper mold 13 and the lower mold 14 maintain a relatively stable positional relationship.

[0025] Specifically, the drive assembly 15 includes a hydraulic cylinder 151 and a guide shaft 152. The hydraulic cylinder 151 is fixedly connected to the top of the frame 1, and its piston rod is vertically downward and fixedly connected to the top of the upper mold base 12. The hydraulic cylinder 151 is a common power drive device that uses the pressure of a liquid to generate linear motion. In this solution, the hydraulic cylinder 151 is the core component for driving the upper mold base 12 to move up and down. Its working principle is to inject or discharge hydraulic oil into the hydraulic cylinder 151, causing the piston rod to extend or retract, thereby driving the upper mold base 12 to move. Alternatively, the drive assembly 15 can also be a pneumatic cylinder, which uses the pressure of compressed air to drive the piston rod to move, thus achieving the same up and down movement of the upper mold base 12. The guide shaft 152 is vertically arranged and fixedly connected to the upper mold base 12, and it is slidably connected to the frame 1. The guide shaft 152 is generally a cylindrical rod made of metal, and its surface is precision machined to ensure good sliding performance. The guide shaft 152 serves to guide the movement of the upper mold base 12, ensuring its stability during vertical movement and preventing wobbling or deviation. Alternatively, the guide shaft 152 can also employ a combination of a guide rail and a slider. The guide rail is fixed to the frame 1, and the slider is connected to the upper mold base 12, sliding along the guide rail to provide guidance. The hydraulic cylinder 151 and the guide shaft 152 are interconnected via the upper mold base 12. The piston rod of the hydraulic cylinder 151 drives the upper mold base 12, while the guide shaft 152 ensures the stability and accuracy of the upper mold base 12's movement. This combination logic allows the upper mold base 12 to move smoothly up and down along the direction of the guide shaft 152 under the drive of the hydraulic cylinder 151, achieving the closing and separation of the upper mold 13 and the lower mold 14.

[0026] Specifically, the automatic locking assembly 2 includes a locking rod 21, a clamping rod 22, a positioning seat 23, a guide post 24, a return spring 25, and a pressure cylinder 26. The locking rod 21 is horizontally slidably connected to the lower mold base 11. It is L-shaped, which increases the contact area between the locking rod 21 and the upper mold 13, making the connection more stable. The end of the locking rod 21 has a bevel, and a locking groove 20 is formed in the side wall of the upper mold 13. The locking groove 20 in the side wall of the upper mold 13 has a mating surface that cooperates with the bevel. The cooperation between the bevel and the mating surface facilitates the locking rod 21 being engaged within the locking groove 20. The locking rod 21 is generally made of high-strength metal to ensure it can withstand greater pressure during locking. The positioning seat 23 is fixedly connected to the lower mold base 11, and the guide post 24 is fixedly connected to the locking rod 21 and horizontally slidably connected to the positioning seat 23. The guide post 24 is a cylindrical rod. Its cooperation with the positioning seat 23 provides guidance for the sliding of the locking rod 21, ensuring the horizontal movement accuracy of the locking rod 21. A return spring 25 is sleeved on the guide post 24. The function of the return spring 25 is to use its tension to drive the locking rod 21 to slide away from the upper mold base 12 when the pressure of the clamping rod 22 on the locking rod 21 is removed, so that the locking rod 21 automatically disengages from the locking groove 20. The pressure cylinder 26 is fixedly connected to the upper mold base 12 and is vertically arranged. A connecting rod 261 is fixedly connected to its bottom. The two ends of the connecting rod 261 are connected and fixed to the clamping rod 22. The upper mold base 12 has a clearance groove 27 corresponding to the position of the clamping rod 22. The pressure cylinder 26 controls the extension and retraction of the piston rod to push the clamping rod 22 up and down. When the piston rod extends, it pushes the clamping rod 22 downward, thereby pushing the locking rod 21 to slide towards the locking groove 20 and insert it into the locking groove 20, achieving automatic fixing. When the piston rod retracts, it facilitates the automatic unlocking and separation of the locking rod 21 and the locking groove 20, facilitating the separation of the upper mold 13 and the lower mold 14. The working principle of the pressure cylinder 26 is similar to that of the hydraulic cylinder 151, except that its power source is compressed air. Alternatively, an electric push rod can be used to replace the pressure cylinder 26. The electric push rod is driven by a motor to rotate the lead screw, thereby achieving the extension and retraction of the push rod and achieving the same purpose of pushing the clamping rod 22. These components work together. When the drive assembly 15 drives the upper mold base 12 to move downward to close the mold, the pressure cylinder 26 pushes the clamping rod 22 downward. The clamping rod 22 pushes the locking rod 21 to insert into the locking groove 20, thereby locking the upper mold 13 and the lower mold 14. When the mold closing is completed and separation is required, the pressure cylinder 26 retracts the piston rod, and the return spring 25 separates the locking rod 21 from the locking groove 20. The upper mold base 12 then moves upward to achieve separation.

[0027] Specifically, the insertion block 16 and the slot 17 are respectively disposed on the side wall of the upper mold base 12 and the side wall of the lower mold base 11. They cooperate with each other for initial positioning and fixing of the upper mold base 12 and the lower mold base 11. The insertion block 16 is fixedly connected to the side wall of the upper mold base 12. It is generally a block structure, and its shape can be square, round, etc. The material of the insertion block 16 is usually metal to ensure its strength and wear resistance. Alternatively, the insertion block 16 can also be made of high-strength plastic material, as long as it meets certain strength and rigidity requirements. The slot 17 is opened on the side wall of the lower mold base 11, and its shape matches the insertion block 16 so that the insertion block 16 can be smoothly inserted. The inner wall of the slot 17 is smoothed to reduce friction with the insertion block 16. In order to reduce the heat emitted from the upper mold 13 and the lower mold 14 from damaging the inner walls of the insertion block 16 and the slot 17, heat insulation pads 18 are fixedly connected to the inner walls of both the insertion block 16 and the slot 17. The heat insulation pad 18 is typically made of materials with good heat insulation properties, such as ceramic fiber or asbestos. Alternatively, newer heat insulation materials such as aerogel felt can be used. The engagement method of the plug-in block 16 and the slot 17 is such that when the drive assembly 15 moves the upper mold base 12 downward, the plug-in block 16 accurately inserts into the slot 17, playing a role in initial positioning and fixation, so that the upper mold 13 and the lower mold 14 can be roughly aligned before mold closing, providing a basis for the subsequent operation of the automatic locking assembly 2.

[0028] The implementation principle of this embodiment is as follows: The vulcanizing machine in this embodiment drives the upper mold base 12 to move up and down through the drive component 15, realizing the closing and separation of the upper mold 13 and the lower mold 14. During the mold closing process, the plug-in block 16 cooperates with the slot 17 for initial positioning and fixation, and the automatic locking component 2 further locks the upper mold 13 and the lower mold 14, reducing the displacement caused by thermal expansion and contraction during vulcanization and improving the mold closing accuracy. At the same time, the heat insulation pad 18 protects the plug-in block 16 and the slot 17, extending their service life. Compared with the prior art, this embodiment can better adapt to the influence of different vulcanization processes, mold materials, and production environment temperatures, effectively ensuring that the mold closing accuracy is always in an ideal state and improving the quality of the final product.

[0029] 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. A high-precision vulcanizing machine, comprising a frame (1), a lower mold base (11) disposed on the frame (1), a lower mold (14) disposed on the lower mold base (11), an upper mold base (12) disposed above the lower mold (14) on the frame (1), an upper mold (13) disposed at the bottom of the upper mold base (12), and a drive assembly (15) connected to the upper mold base (12) for driving the upper mold base (12) to move up and down, characterized in that: The upper mold base (12) is fixedly connected to the side wall of the plug-in block (16), and the lower mold base (11) is provided with a slot (17) on the side wall. The slot (17) is used for the plug-in block (16) to be inserted. An automatic locking component (2) is provided at the connection between the upper mold (13) and the lower mold (14).

2. The high-precision vulcanizing machine according to claim 1, characterized in that: The inner walls of the plug block (16) and the slot (17) are both fixedly connected with heat insulation pads (18).

3. A high-precision vulcanizing machine according to claim 1, characterized in that: The automatic locking assembly (2) includes a locking rod (21) that is horizontally slidably connected to the lower mold base (11), a locking groove (20) is provided on the side wall of the upper mold (13), and a pressing rod (22) that extends downward is provided on the upper mold base (12). The pressing rod (22) is used to press the locking rod (21) into the locking groove (20).

4. A high-precision vulcanizing machine according to claim 3, characterized in that: The locking rod (21) is L-shaped, with an inclined surface at the end of the locking rod (21) and a mating surface that cooperates with the inclined surface in the locking groove (20).

5. A high-precision vulcanizing machine according to claim 4, characterized in that: A positioning seat (23) is fixedly connected to the lower mold base (11), and a guide post (24) is fixedly connected to the locking rod (21). The guide post (24) is horizontally slidably connected to the positioning seat (23), and a reset spring (25) is sleeved on the guide post (24).

6. A high-precision vulcanizing machine according to claim 4, characterized in that: A pressing cylinder (26) is fixedly connected to the upper mold base (12). The pressing cylinder (26) is vertically arranged. A connecting rod (261) is fixedly connected to the bottom of the pressing cylinder (26). The two ends of the connecting rod (261) are connected and fixed to the pressing rod (22). A clearance groove (27) is opened on the upper mold base (12) corresponding to the position of the pressing rod (22).

7. A high-precision vulcanizing machine according to claim 1, characterized in that: The drive assembly (15) includes a hydraulic cylinder (151) fixedly connected to the top of the frame (1). The piston rod of the hydraulic cylinder (151) is vertically downward and fixedly connected to the top of the upper mold base (12). A guide shaft (152) is fixedly connected to the upper mold base (12). The guide shaft (152) is vertically arranged and slidably connected to the frame (1).

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