A flat press for rubber testing
Patent Information
- Application Number
- CN202522615319.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-10
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-10
AI Technical Summary
[0003]针对上述情况，本实用新型提供了一种橡胶检测用平板硫化机，能够很好解决现有技术中轮胎生产过程中胶片样品检测用平板硫化机存在的技术问题
该平板硫化机可采用多层热压板一次性进行多片胶片样品的硫化试验，并且通过将热压板的中间硫化板部分设计成抽屉式可插拔的分离结构，还加装了多层热压板之间的弹簧辅助回落复位设置，同时硫化板部分还增加了压缩空气风冷降温设施，以及风刀出气剥离胶片样品功能，能够极大提高平板硫化机更换试验胶片样品的速度，提升硫化过程中热压板升降运动的稳定性和平整性，提高轮胎生产过程中胶片样品的硫化试验效率及安全性，同时能够有效降低工作人员手部发生高温烫伤的操作风险。
Smart Images
Figure CN224897794U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of tire rubber testing equipment, specifically relating to a flat vulcanizing machine for rubber testing. Background Technology
[0002] Tires are mainly assembled from components such as the airtight layer, belt layer, sidewall rubber, and tread rubber. The sidewall rubber and tread rubber, among others, require sampling and testing using a flatbed vulcanizing machine during production. This primarily verifies the rubber's tensile strength, cross-linking properties, and heat resistance. The vulcanization test involves placing the rubber sample onto a heated pressure plate of the flatbed vulcanizing machine. Then, under the lifting action of the lifting mechanism, the sample is gradually compressed by the pressure plate, and the vulcanization test begins under heat and pressure. The heating methods for the hot pressure plate of the flatbed vulcanizing machine include electric heating, steam heating, and heat transfer oil heating. The lifting mechanism of the flatbed vulcanizing machine mainly uses hydraulic lifting and electric cylinder lifting for pressurization. After each vulcanization test, the rubber sample needs to be removed from the hot pressure plate of the flatbed vulcanizing machine for replacement with another sample. The film sample continues for the next vulcanization test. However, after the vulcanization test, the temperature of the hot platen and top platen of the flat vulcanizing machine is still very high, and the film sample is tightly adhered to the hot platen with great adhesive force, making it difficult to remove. Therefore, if quality inspectors were to forcefully reach between the hot platen and top platen to remove the film sample, there is a risk of burns. Waiting for the hot platen to cool down would take too long, severely impacting the efficiency of the vulcanization testing. Furthermore, the existing flat vulcanizing machine's hot platen relies entirely on its own weight for descent. There is a possibility that one or two corners of the hot platen may collide with the guide rail during descent, causing incomplete descent. This could lead to an imbalance in the film's lifting during the next vulcanization test, creating a safety hazard. Therefore, it is essential to further improve and refine the existing flat vulcanizing machine. Utility Model Content
[0003] In view of the above situation, this utility model provides a flat vulcanizing machine for rubber testing, which can effectively solve the technical problems existing in the flat vulcanizing machine for testing rubber samples in the tire production process.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: A flat vulcanizing machine for rubber testing includes a lower base and an upper pressure plate, as well as four vertical guide rails supporting and connecting the lower base and the upper pressure plate. A liftable hot press plate is arranged between the four guide rails. A heating device is laid in the lower middle part of the hot press plate. A lifting mechanism for driving the lifting movement of the hot press plate is arranged above the center of the lower base. The heating device is an electric heating wire, and the lifting mechanism is a hydraulic cylinder. All four guide rails are vertical cylindrical guide rails. The left and right corners of the hot press plate are slidably connected to the four guide rails via arc-shaped guide sliders. The radius of the arc-shaped guide sliders is equal to the radius of the guide rails. The hot press plate is designed to be removable and has a drawer-type vulcanizing plate in the upper middle part, which facilitates the removal of the vulcanizing plate from the middle of the hot press plate to place the film sample. The vulcanizing plate has a hollow cooling chamber in the middle for rapid air cooling. The rear side of the cooling chamber has an air inlet for introducing compressed air, and the front side of the cooling chamber has an air outlet for discharging compressed air. The air inlet is equipped with a stainless steel air connector for quick connection of a compressed air pipe, and the air outlet is welded with a guide air knife that guides the compressed air to blow laterally onto the upper surface of the vulcanizing plate, facilitating the removal and peeling of the film sample from the vulcanizing plate.
[0005] Furthermore, the upper middle part of the hot press plate is provided with a drawer track groove extending in the front-to-back direction, and the left and right sides of the vulcanized plate are integrally fixed with drawer track parts that can be slidably inserted into the drawer track groove. The vulcanized plate is slidably arranged in the drawer track groove of the hot press plate, and the upper surface of the vulcanized plate is flush with the upper surface of the hot press plate.
[0006] Furthermore, multiple layers of hot press plates are detachably arranged between the four column guide rails from bottom to top. Each layer of hot press plate has a limit clamp below its four guide sliders. Each limit clamp can be detachably fastened to the outside of the column guide rail, and the four limit clamps of the same layer of hot press plate are at the same height on the column guide rail.
[0007] Furthermore, a reset spring is correspondingly provided above the four guide sliders of each hot press plate. Each reset spring is movably sleeved on the outside of the column guide rail. The upper end of each reset spring abuts against the lower side of each limiting clamp, and the lower end of each reset spring abuts against the upper side of each guide slider, thereby pressing down on each guide slider.
[0008] Furthermore, a hydraulic station is provided on the side of the lower base to provide hydraulic lifting power to the hydraulic cylinder. The hydraulic station is equipped with an oil circuit control valve group for controlling the lifting and lowering of the hydraulic cylinder.
[0009] Furthermore, a control box is also provided on the outer side of the lower base. The control box contains a heating control circuit for controlling the working state of the electric heating wire, and a gas path solenoid valve group for controlling the on / off of compressed air in the cooling chamber.
[0010] This utility model also includes other components that enable its normal use, all of which are conventional means in the field. In addition, devices or components not limited in this utility model, such as: the lower base, upper pressure plate, column guide rod, hydraulic cylinder of the flat vulcanizing machine, as well as the oil circuit control valve group on the hydraulic station and the heating control circuit and compressed air solenoid valve group in the control box, all adopt the prior art in the field.
[0011] The beneficial effects of this utility model are as follows: This flat vulcanizing machine can perform vulcanization tests on multiple rubber samples at once using multi-layer hot press plates. By designing the middle vulcanizing plate of the hot press plate as a drawer-type, pluggable, and detachable structure, and by adding a spring-assisted return and reset mechanism between the multiple layers of hot press plates, the vulcanizing plate section also features a compressed air cooling system and an air knife function for peeling off the rubber samples. This greatly improves the speed of changing test rubber samples, enhances the stability and flatness of the hot press plate's lifting and lowering movement during vulcanization, improves the efficiency and safety of rubber sample vulcanization tests in tire production, and effectively reduces the risk of workers suffering burns from high temperatures. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of the flat vulcanizing machine for rubber testing in this utility model; Figure 2 for Figure 1 Schematic diagram of the hot press plate structure along the AA direction in the middle; Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the vulcanized plate along the BB direction; Figure 4 for Figure 1 A schematic cross-sectional view of the cooling cavity along the CC direction; Figure 5 for Figure 1 A three-dimensional structural diagram of the guide slider. Detailed Implementation
[0013] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without creative effort to obtain all other embodiments should be included within the protection scope of the present invention.
[0014] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "inner," "outer," "center," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0015] Example like Figure 1-5 As shown, a flat vulcanizing machine for rubber testing includes a lower base 1 and an upper pressure plate 2, as well as four vertical guide rails 3 supporting and connecting the lower base and the upper pressure plate. Two layers of hot press plates 4 are detachably arranged between the four guide rails from bottom to top. An electric heating wire 5 is laid in the lower middle part of the hot press plate. A hydraulic cylinder 6 for driving the lifting and lowering movement of the hot press plate is located above the center of the lower base. All four guide rails are vertical cylindrical guide rails. The left and right corners of each hot press plate are slidably connected to the four guide rails via arc-shaped guide sliders 7. The radius of the arc-shaped guide sliders is adapted to the radius of the guide rails. The lower base, upper pressure plate, guide rails, hot press plates, and internal electric heating wires of the flat vulcanizing machine all adopt existing technology and will not be described in detail here.
[0016] The upper middle part of the hot press plate is provided with a drawer-type vulcanizing plate 18, which is convenient to pull out from the middle of the hot press plate to place the film sample 8. The vulcanizing plate has a hollow cooling cavity 9 in the middle for rapid air cooling of the vulcanizing plate, avoiding the waste of time that can only be spent waiting for the hot press plate to cool down naturally as in the prior art. The rear side of the cooling cavity has an air inlet for introducing compressed air, and the front side of the cooling cavity has an air outlet for discharging compressed air. The air inlet is equipped with a stainless steel air connector 10 for quick connection of compressed air pipe. After the vulcanization test, compressed air can be quickly connected for air cooling. During hot press vulcanization, the compressed air pipe can be separated and pulled out. The air outlet is welded with a guide air knife 11 that can guide the compressed air from the outlet back and blow it laterally onto the upper surface of the vulcanizing plate.
[0017] The air-draining knife is made of steel plate through sheet metal processing. It has a flat rectangular air duct structure with a V-shaped fold. Its air inlet end is sealed and welded to the air outlet of the cooling chamber. Its air outlet end is a flat duckbill structure close to the upper surface edge of the vulcanizing plate in the left and right direction. It can blow high-pressure airflow towards the bottom of the film sample in the middle of the vulcanizing plate. This helps to peel the film sample from the surface of the vulcanizing plate by using high-pressure airflow. This avoids the time-consuming and laborious process of picking up the film sample from the vulcanizing plate by hand, as is done in the existing technology. It also poses a risk of burns to the hands.
[0018] The upper middle part of the hot press plate is provided with a drawer track groove 12 extending in the front-to-back direction. The left and right sides of the vulcanized plate are integrally fixed with drawer track parts that can be slidably inserted into the drawer track groove. The vulcanized plate is slidably disposed in the drawer track groove of the hot press plate, and the upper surface of the vulcanized plate is flush with the upper surface of the hot press plate. The lower surface of the vulcanized plate slides against the surface of the drawer track groove of the hot press plate, thereby ensuring good heat conduction between the hot press plate and the vulcanized plate.
[0019] Each layer of hot press plate has four guide sliders with corresponding limit clamps 13 below them. Each limit clamp can be detachably fastened to the outside of the column guide rail. The four limit clamps of the same hot press plate are at the same height on the column guide rail. They are used to limit the fall height when each hot press plate falls back. The height of each limit clamp on the column guide rail can be adjusted by sliding it up and down after loosening the locking screw of the limit clamp.
[0020] Each layer of hot press plate is equipped with a return spring 14 above the four guide sliders. Each return spring is movably sleeved on the outside of the column guide rail. The upper end of each return spring abuts against the lower side of each limit clamp, and the lower end of each return spring abuts against the upper side of each guide slider. This serves to press down on the guide sliders of the hot press plate, ensuring that the four corners of each layer of hot press plate fall back into place when they fall back.
[0021] A hydraulic station 15 is fitted to the side of the lower base to provide hydraulic lifting power to the hydraulic cylinder. The hydraulic station is equipped with an oil circuit control valve group (not shown in the figure) for controlling the lifting and lowering of the hydraulic cylinder. A control box 16 is also located on the outside of the lower base. The control box contains a heating control circuit (not shown in the figure) for controlling the working state of the electric heating wire, and an air circuit solenoid valve group (not shown in the figure) for controlling the compressed air supply to the cooling chamber. The control box contains a PLC automatic control system, and a foot switch 17 is located on the outside of the control box for controlling the operation of the flat vulcanizing machine. This foot switch enables one-button fully automatic program control of the lifting and lowering of the hydraulic cylinder, the electric heating of the hot press plate, and the air cooling of the vulcanizing plate. The hydraulic station and its oil circuit control valve group, the compressed air and its air circuit solenoid valve group, the heating control circuit, and the PLC automatic control system in the control box all utilize existing technology and will not be described in detail here.
[0022] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A flat vulcanizing machine for rubber testing, comprising a lower base and an upper pressure plate, and four vertical guide rails supporting and connecting the lower base and the upper pressure plate, wherein a liftable hot pressure plate is arranged between the four vertical guide rails, a heating device is laid in the lower middle part of the hot pressure plate, and a lifting mechanism for driving the lifting movement of the hot pressure plate is arranged above the center of the lower base, characterized in that: The heating device is an electric heating wire, the lifting mechanism is a hydraulic cylinder, and the four column guide rails are all vertical cylindrical guide rails. The left and right corners of the hot press plate are slidably connected to the four column guide rails via arc-shaped guide sliders. The radius of the arc-shaped guide sliders is adapted to the radius of the column guide rails. A drawer-type vulcanizing plate is pluggably installed in the upper middle part of the hot press plate, which facilitates the removal of the vulcanizing plate from the middle of the hot press plate to place the film sample. A hollow cooling chamber is opened in the middle of the vulcanizing plate for rapid air cooling. An air inlet for compressed air is opened on the rear side of the cooling chamber, and an air outlet for compressed air is opened on the front side of the cooling chamber. A stainless steel air connector is installed on the air inlet for quick connection of the compressed air pipe. A guide air knife is welded on the air outlet to guide the compressed air out and blow it laterally onto the upper surface of the vulcanizing plate, which facilitates the peeling of the film sample from the vulcanizing plate.
2. The flat vulcanizing machine for rubber testing according to claim 1, characterized in that: The upper middle part of the hot press plate is provided with a drawer track groove extending in the front-to-back direction, and the left and right sides of the vulcanized plate are integrally fixed with drawer track parts that can slide and insert into the drawer track groove.
3. The flat vulcanizing machine for rubber testing according to claim 1, characterized in that: Multiple layers of hot press plates are detachably arranged between the four column guide rails from bottom to top. Each layer of hot press plate has a limit clamp below its four guide sliders. Each limit clamp can be detachably fastened to the outside of the column guide rail, and the four limit clamps of the same layer of hot press plate are at the same height on the column guide rail.
4. A flat vulcanizing machine for rubber testing according to claim 3, characterized in that: Each layer of hot press plate has a corresponding reset spring above the four guide sliders. Each reset spring is movably sleeved on the outside of the column guide rail. The upper end of each reset spring abuts against the lower side of each limit clamp, and the lower end of each reset spring abuts against the upper side of each guide slider.
5. A flat vulcanizing machine for rubber testing according to claim 1, characterized in that: A hydraulic station is provided on the side of the lower base to provide hydraulic lifting power to the hydraulic cylinder. The hydraulic station is equipped with an oil circuit control valve group for controlling the lifting and lowering of the hydraulic cylinder.
6. A flat vulcanizing machine for rubber testing according to claim 5, characterized in that: A control box is also provided on the outside of the lower base. The control box contains a heating control circuit for controlling the working state of the electric heating wire, and a gas path solenoid valve group for controlling the on / off of compressed air in the cooling chamber.