Driving lifting mechanism of lower heating plate for press vulcanizer

Abstract

The utility model belongs to the technical field of rubber vulcanization, and particularly relates to a driving lifting mechanism of a lower heating plate for a press vulcanizer, which comprises a rack, a plunger cylinder is arranged at the bottom of the rack, the plunger cylinder comprises an oil cylinder body and a plunger, a multi-layer sealing structure is arranged at the top of the oil cylinder body, the plunger is shorter than the oil cylinder body, and the plunger is arranged in the oil cylinder body. When the plunger descends to the bottom of the oil cylinder body, the multi-layer sealing structure is higher than the upper end face of the plunger, and a connecting flange plate is detachably installed at the top end of the plunger. When the plunger cylinder works, the connecting relation between the plunger and the connecting flange plate is removed, the plunger descends to the bottom of the oil cylinder body, the multi-layer sealing structure can be exposed, a worker can replace the multi-layer sealing structure conveniently, in addition, when the plunger cylinder does not work, the plunger completely descends into the cylinder body, and the phenomenon that the plunger is oxidized, rusted and the like due to the fact that the plunger is exposed in the air for a long time is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber vulcanization, in particular to a driving lifting mechanism for a lower heating plate of a flat vulcanizing machine. Background Art

[0002] The plate vulcanizer is an important molding equipment for various rubber model products and non-model products. It has the characteristics of high pressure, wide adaptability, high efficiency, and small footprint. It is widely used in rubber product companies. The main function of the plate vulcanizer is to provide the pressure and temperature required for vulcanization. The pressure is generated by the lifting mechanism. At present, the commonly used lifting mechanisms in the market are piston cylinders and plunger cylinders. The plate vulcanizer mostly uses plunger cylinders, and the plunger cylinders are divided into upper and lower structures. The sealing system is a mechanism to prevent the leakage of the working medium (internal leakage and external leakage) and to prevent foreign matter (such as air, dust and water, etc.) from entering the hydraulic components and hydraulic systems. The sealing effect of the hydraulic cylinder directly affects whether the hydraulic system can work normally. To a certain extent, it has restricted the improvement of the performance and reliability of the hydraulic components and hydraulic systems, and the length of their service life. Therefore, it is particularly important to provide a hydraulic cylinder with good sealing effect.

[0003] CN219311789U provides a hydraulic cylinder for a plate vulcanizer and a plate vulcanizer, belonging to the technical field of rubber vulcanization production. In the utility model, an internal pressure seal and a dust ring for sealing are arranged on the top inner wall of the oil cylinder body. During long-term use, the internal pressure seal and the dust ring are worn. When wear occurs, the flange needs to be disassembled and replaced, or the plunger needs to be pulled out to replace the seal, which is troublesome to replace. When the plunger cylinder is not working, the top of the plunger is exposed to the air for a long time, which is easy to cause oxidation and rust, affecting the use of the plunger cylinder. Utility Model Content

[0004] In order to overcome the above-mentioned defects existing in the prior art, the utility model provides a driving lifting mechanism for a lower heating plate of a flat vulcanizing machine.

[0005] A driving and lifting mechanism for a lower heating plate of a flat vulcanizing machine comprises a frame, a plunger cylinder is provided at the bottom of the frame, the plunger cylinder comprises a cylinder body and a plunger, a multi-layer sealing structure is provided at the top of the cylinder body, the length of the plunger is less than the length of the cylinder body, when the plunger descends to the bottom of the cylinder body, the multi-layer sealing structure is higher than the upper end surface of the plunger, and a connecting flange is detachably installed at the top of the plunger.

[0006] Furthermore, the multi-layer sealing structure includes a dust ring, a nitrile rubber sealing ring and a polyurethane sealing ring from top to bottom.

[0007] Furthermore, an upper heating plate is fixedly installed on the top of the frame, a lower heating plate is provided below the upper heating plate, a fixed flange is provided below the lower heating plate, and the connecting flange is bolted to the fixed flange.

[0008] Furthermore, an oil inlet nozzle is provided on the side wall of the oil cylinder body, one end of the oil inlet nozzle is connected to the oil cylinder body, and the other end is connected to the oil supply device through a pipeline.

[0009] Furthermore, a limiting protrusion is provided below the multi-layer sealing structure, and the inner side wall of the limiting protrusion is flush with the inner side walls of the dust ring, the nitrile rubber sealing ring and the polyurethane sealing ring. The oil inlet nozzle is located below the limiting protrusion, and the end of the oil inlet nozzle extending into the interior of the cylinder body is smaller than the protruding length of the limiting protrusion.

[0010] Furthermore, a first groove, a second groove and a third groove corresponding to the dust ring, the nitrile rubber sealing ring and the polyurethane sealing ring are respectively provided on the inner wall of the oil cylinder body, and an anti-slip protrusion is provided on the first groove.

[0011] Due to the adoption of the above technical scheme, the beneficial technical effect of the utility model is as follows: the utility model is provided with a multi-layer sealing structure on the top inner wall of the oil cylinder body, which is conducive to achieving effective sealing of the plunger cylinder. When the multi-layer sealing structure needs to be replaced after long-term use, the connection between the plunger and the connecting flange is released, and the plunger drops to the bottom of the oil cylinder body, so that the multi-layer sealing structure can be exposed, which is convenient for the staff to replace it. In addition, when the plunger cylinder is not working, the plunger is completely dropped into the cylinder body. Due to the limiting effect of the connecting flange, the plunger cannot drop to the bottom of the oil cylinder body. The multi-layer sealing structure plays a sealing role and prevents the plunger from being exposed to the air for a long time, causing oxidation and rusting of the plunger, and also prevents dust from falling into the oil cylinder body and affecting the normal use of the plunger cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a driving and lifting mechanism for a lower heating plate of a flat vulcanizing machine according to the utility model;

[0013] Figure 2 This is a front view of a driving and lifting mechanism for a lower heating plate of a flat vulcanizing machine according to the utility model;

[0014] Figure 3 It is a side view of a driving lifting mechanism of a lower heating plate for a flat vulcanizing machine of the utility model;

[0015] Figure 4 For this utility model Figure 2 Schematic diagram of the cross-sectional structure in the AA direction;

[0016] Figure 5 For this utility model Figure 4 A magnified schematic diagram of the middle B area;

[0017] Figure 6 This is a schematic diagram of the structure of the oil cylinder body in the utility model;

[0018] Figure 7 For this utility model Figure 2 Schematic diagram of the cross-sectional structure of the oil cylinder body.

[0019] In the figure, 1, frame, 2, cylinder body, 3, plunger, 4, connecting flange, 5, dust ring, 6, nitrile rubber sealing ring, 7, polyurethane sealing ring, 8, upper heating plate, 9, lower heating plate, 10, fixed flange, 11, oil inlet nozzle, 12, limiting protrusion, 13, first groove, 14, second groove, 15, third groove, 16, anti-slip protrusion. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the technical solution of the utility model, the utility model is further described below in conjunction with the accompanying drawings. Obviously, the accompanying drawings described below are only one embodiment of the utility model. For ordinary technicians in this field, without paying any creative work, other embodiments can be obtained based on this drawing and embodiment, which all belong to the protection scope of the utility model.

[0021] according to Figure 1-7 As shown, a driving and lifting mechanism for a lower heating plate 9 for a flat vulcanizing machine includes a frame 1, a plunger 3 cylinder is provided at the bottom of the frame 1, the plunger 3 cylinder includes a cylinder body 2 and a plunger 3, a multi-layer sealing structure is provided on the top of the cylinder body 2, the length of the plunger 3 is less than the length of the cylinder body 2, when the plunger 3 descends to the bottom of the cylinder body 2, the multi-layer sealing structure is higher than the upper end surface of the plunger 3, and a connecting flange 4 is detachably installed on the top of the plunger 3.

[0022] In the above specific embodiment, a multi-layer sealing structure is provided on the top inner wall of the cylinder body 2, which is conducive to achieving effective sealing of the plunger 3 cylinder. When the multi-layer sealing structure needs to be replaced after long-term use, the connection between the plunger 3 and the connecting flange 4 is released, and the plunger 3 drops to the bottom of the cylinder body 2, so that the multi-layer sealing structure can be exposed, which is convenient for the staff to replace it. In addition, when the plunger 3 cylinder is not working, the plunger 3 is completely dropped into the cylinder body. Due to the limiting effect of the connecting flange 4, the plunger 3 cannot drop to the bottom of the cylinder body 2. The multi-layer sealing structure plays a sealing role and prevents the plunger 3 from being exposed to the air for a long time, causing oxidation and rusting of the plunger 3, and also prevents dust from falling into the cylinder body 2 and affecting the normal use of the plunger 3 cylinder.

[0023] The multi-layer sealing structure includes a dust ring 5, a nitrile rubber sealing ring 6 and a polyurethane sealing ring 7 from top to bottom. The dust ring 5 is installed at the top to prevent dust from entering the cylinder body 2. The nitrile rubber sealing ring 6 has the characteristic of high temperature resistance, and the polyurethane sealing ring 7 has the characteristic of wear resistance. At the same time, compared with the prior art that only seals through one or two layers, setting a three-layer sealing structure is beneficial to increasing the sealing performance of the plunger 3 cylinder.

[0024] An upper heating plate 8 is fixedly installed on the top of the frame 1, and a lower heating plate 9 is provided below the upper heating plate 8. A fixed flange 10 is provided below the lower heating plate 9. The connecting flange 4 is bolted to the fixed flange 10. When the multi-layer sealing structure needs to be replaced, the lower heating plate 9 is supported by a support to prevent the lower heating plate 9 from moving downward, and then the connection between the connecting flange 4 and the plunger 3 is released. Preferably, the connecting flange 4 is connected to the plunger 3 by bolts, and the plunger 3 can be lowered by releasing the hydraulic oil in the cylinder body 2. When the hydraulic oil in the cylinder body 2 is completely released, the plunger 3 drops to the bottom of the cylinder body 2. At this time, the multi-layer sealing structure is exposed and can be replaced.

[0025] An oil inlet nozzle 11 is disposed on the side wall of the oil cylinder body 2 , one end of the oil inlet nozzle 11 is communicated with the oil cylinder body 2 , and the other end is connected to the oil supply device through a pipeline.

[0026] A limiting protrusion 12 is provided below the multi-layer sealing structure, and the inner side wall of the limiting protrusion 12 is flush with the inner side walls of the dust ring 5, the nitrile rubber sealing ring 6 and the polyurethane sealing ring 7. The oil inlet nozzle 11 is located below the limiting protrusion 12, and the end of the oil inlet nozzle 11 extending into the cylinder body 2 is smaller than the protruding length of the limiting protrusion 12. The limiting protrusion 12 can prevent the oil inlet nozzle 11 from interfering with the plunger 3.

[0027] The inner wall of the cylinder body 2 is provided with a first groove 13, a second groove 14 and a third groove 15 corresponding to the dust ring 5, the nitrile rubber sealing ring 6 and the polyurethane sealing ring 7, respectively. The first groove 13 is provided with an anti-slip protrusion 16. When the plunger 3 is lifted or lowered, the anti-slip protrusion 16 can prevent the dust ring 5 from falling off.

[0028] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A driving and lifting mechanism for a lower heating plate (9) for a flat vulcanizing machine, comprising a frame (1), characterized in that: A plunger (3) cylinder is provided at the bottom of the frame (1), and the plunger (3) cylinder comprises a cylinder body (2) and a plunger (3). A multi-layer sealing structure is provided at the top of the cylinder body (2). The length of the plunger (3) is less than the length of the cylinder body (2). When the plunger (3) descends to the bottom of the cylinder body (2), the multi-layer sealing structure is higher than the upper end surface of the plunger (3). A connecting flange (4) is detachably mounted on the top of the plunger (3).

2. The driving and lifting mechanism of the lower heating plate (9) for a flat-plate vulcanizing machine according to claim 1, characterized in that: The multi-layer sealing structure comprises, from top to bottom, a dustproof ring (5), a nitrile rubber sealing ring (6) and a polyurethane sealing ring (7).

3. The driving and lifting mechanism of the lower heating plate (9) for a flat vulcanizing machine according to claim 2, characterized in that: An upper heating plate (8) is fixedly mounted on the top of the frame (1), a lower heating plate (9) is provided below the upper heating plate (8), a fixed flange (10) is provided below the lower heating plate (9), and the connecting flange (4) is bolted to the fixed flange (10).

4. The driving and lifting mechanism of the lower heating plate (9) for a flat-plate vulcanizing machine according to claim 3 is characterized in that: An oil inlet nozzle (11) is provided on the side wall of the oil cylinder body (2); one end of the oil inlet nozzle (11) is connected to the oil cylinder body (2), and the other end is connected to the oil supply device through a pipeline.

5. The driving and lifting mechanism of the lower heating plate (9) for a flat-plate vulcanizing machine according to claim 4, characterized in that: A limiting protrusion (12) is provided below the multi-layer sealing structure, and the inner side wall of the limiting protrusion (12) is flush with the inner side walls of the dust ring (5), the nitrile rubber sealing ring (6) and the polyurethane sealing ring (7). The oil inlet nozzle (11) is located below the limiting protrusion (12), and the end of the oil inlet nozzle (11) extending into the interior of the oil cylinder body (2) is smaller than the protruding length of the limiting protrusion (12).

6. The driving and lifting mechanism of the lower heating plate (9) for a flat-plate vulcanizing machine according to claim 5, characterized in that: The inner wall of the oil cylinder body (2) is provided with a first groove (13), a second groove (14) and a third groove (15) corresponding to the dust ring (5), the nitrile rubber sealing ring (6) and the polyurethane sealing ring (7), respectively, and the first groove (13) is provided with an anti-slip protrusion (16).

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