Novel plate vulcanizing machine for laboratory

Abstract

The utility model relates to a novel plate vulcanizing machine for a laboratory. Comprising a frame body, a hydraulic station assembly is fixed in the frame body, a supporting plate is fixed on the frame body, a hydraulic cylinder is fixed below the supporting plate, the hydraulic cylinder is connected with a flange, a large guide column is fixed on the supporting plate, the large guide column is connected with an upper plate and a self-locking nut, a preheating limiting part is fixed on the upper plate, and the preheating limiting part is connected with the self-locking nut. An upper plate stud penetrates through an upper plate to be connected with an upper heating plate assembly, the upper plate is connected with a small guide column and a lock nut, the small guide column penetrates through a middle plate to enable the middle plate to suspend on the outer surface of a large guide column, a lower plate is fixed to a flange, a lower cooling plate assembly is fixed to the lower plate, and a lower heating plate assembly is fixed to the middle plate. And an upper cooling plate assembly is fixed below the middle plate. According to the utility model, the upper heating plate assembly floats, the pressing material is preheated only under the gravity of the upper heating plate assembly during preheating, and the floating structure improves the pressure distribution uniformity between the upper heating plate assembly and the lower heating plate assembly.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rubber industry and plastic product field, is often used in material performance test and new product research and development, can through the adjustment vulcanization process parameter, such as pressure, temperature, time etc., to study the performance variation law of rubber, plastic and other materials under different formula and process condition, provides the basis for the optimized design and process improvement of product. BACKGROUND

[0002] In recent years, the rubber and plastic industry at home and abroad has developed rapidly, not only considerable progress in various processing technologies, but also great development in equipment. In the production process of rubber, plastic and other products, quality control is crucial. The laboratory flat vulcanizing machine can be used for preparing standard samples and testing the physical properties of raw materials, semi-finished products and finished products. The laboratory flat vulcanizing machine is a widely used instrument at present. There are many manufacturers of flat vulcanizing machines in China, but there are great differences in quality, performance and function, and there are many problems such as poor uniformity of heating plate temperature, uneven pressure distribution between mold and heating plate assembly, unstable pressure control, etc. Therefore, we propose a floating upper heating plate assembly. When the mold is subjected to pressure, the floating heating plate assembly can automatically adjust the position according to the different shapes and stress conditions of the mold, making the pressure distribution between the mold and the heating plate assembly more uniform. The heating plate assembly has six heating pipes and three temperature sensors inside, which can independently control the temperature to ensure the uniformity of the heating plate temperature. SUMMARY

[0003] The utility model aims at providing a kind of new flat vulcanizing machine for laboratory.It is composed of frame, sheet metal shell, hydraulic device, characterized by, frame is fixed with hydraulic station assembly, energy accumulator, the support plate, counterweight plate, electric control box are fixed on the frame, the hydraulic cylinder is fixed below the support plate, the hydraulic cylinder is connected with flange, the big guide column, lower limit, door limit are fixed on the support plate, the big guide column is connected with upper plate and self-locking nut, preheating limit is fixed on the upper plate, upper plate stud is connected with upper heating plate assembly by passing through upper plate, the upper plate is connected with small guide column and lock nut, small guide column passes through middle plate and makes middle plate suspend on the surface of big guide column, upper cooling plate assembly is fixed below the middle plate, upper plate stud is connected with washer and adjusting nut, upper heating plate assembly suspends below upper plate by upper plate stud, upper heating plate assembly is connected with junction box, flange is fixed with lower plate, lower cooling plate assembly is fixed on the lower plate, lower plate is connected with lower guide column sleeve, lower heating plate assembly is fixed on the middle plate, middle plate is connected with middle plate guide column sleeve, big guide column passes through middle plate guide column sleeve and lower guide column sleeve.

[0004] Preferably, the upper heating plate assembly, upper plate stud, gasket, adjusting nut, and preheating limiter form a floating structure for the upper heating plate assembly, which improves the uniformity of pressure distribution between the upper and lower heating plate assemblies during material pressing.

[0005] Preferably, the lower cooling plate assembly, lower plate, flange, hydraulic cylinder, hydraulic station assembly, and accumulator form a hydraulic lifting system with stable pressure control, which can enable the upper heating plate assembly and the lower heating plate assembly to press the plates under hydraulic drive.

[0006] Preferably, the internal structure of the upper heating plate assembly includes heating tube mounting holes, temperature sensor mounting holes, and fixed heating tube mounting holes. Six heating tubes and three temperature sensors can be installed in the internal structure. The three temperature sensors control the temperature independently, which can ensure the uniformity of the heating plate temperature.

[0007] Compared with existing technologies, the beneficial effects of this utility model are as follows:

[0008] 1. The upper heating plate assembly floats during the vulcanization process. When the mold is under pressure, the floating heating plate assembly can automatically adjust its position according to the different shapes of the mold and the stress conditions, making the pressure distribution between the mold and the heating plate assembly more uniform.

[0009] 2. The heating plate assembly is equipped with six heating elements and three temperature sensors. Each of the three temperature sensors controls the temperature independently, ensuring the uniformity of the heating plate temperature.

[0010] 3. This device has a hydraulic self-locking function. The hydraulic system adopts an accumulator and a proportional hydraulic system, which can make the pressure control precise and stable, the speed adjustable, and can be set with seven-stage gradient pressure increase and automatic pressure compensation function. Attached Figure Description

[0011] Figure 1 This is the front view of the present invention.

[0012] Figure 2 This is the left view of the present invention.

[0013] Figure 3 This is a structural diagram of the upper heating plate assembly of this utility model.

[0014] Wherein: 1-frame, 2-hydraulic cylinder, 3-hydraulic station assembly, 4-supporting plate, 5-lower limit, 6-flange, 7-lower plate, 8-lower cooling plate assembly, 9-upper cooling plate assembly, 10-middle plate, 11-lower heating plate assembly, 12-upper heating plate assembly, 13-upper plate, 14-large guide column, 15-upper plate stud, 16-gasket, 17-adjusting nut, 18-preheating limit, 19-door limit, 20-self-locking nut, 21-middle plate guide column sleeve, 22-lower plate guide column sleeve, 23-counterweight plate, 24-electric control box, 25-accumulator, 26-junction box, 27-lock nut, 28-small guide column, 201-heating pipe mounting hole, 202-temperature sensor mounting hole, 203-fixed heating plate mounting hole. DETAILED DESCRIPTION

[0015] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Figure 1 、 2 The technical solutions of the present application will be described clearly and completely below with reference to the drawings. The embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0016] Specifically, a novel flat vulcanizing machine for laboratory. Its composition includes frame, sheet metal shell, hydraulic device, characterized in that the frame is fixed with a hydraulic station assembly, an accumulator, the frame is fixed with a supporting plate, a counterweight plate and an electric control box, the supporting plate is fixed with a hydraulic cylinder below, the hydraulic cylinder is connected with a flange, the supporting plate is fixed with a large guide column, a lower limit and a door limit, the large guide column is connected with an upper plate and a self-locking nut, the upper plate is fixed with a preheating limit, an upper plate stud passes through the upper plate and is connected with an upper heating plate assembly, the upper plate is connected with a small guide column and a lock nut, the small guide column passes through the middle plate to make the middle plate suspended on the outer surface of the large guide column, the middle plate is fixed with an upper cooling plate assembly below, the upper plate stud is connected with a gasket and an adjusting nut, the upper heating plate assembly is suspended below the upper plate through the upper plate stud, the upper heating plate assembly is connected with a junction box, the flange is fixed with a lower plate, the lower plate is fixed with a lower cooling plate assembly, the lower plate is connected with a lower guide column sleeve, the middle plate is fixed with a lower heating plate assembly, the middle plate is connected with a middle plate guide column sleeve, and the large guide column passes through the middle plate guide column sleeve and the lower guide column sleeve.

[0017] Further, the upper heating plate assembly, the upper plate stud, the gasket, the adjusting nut and the preheating limit form an upper heating plate assembly floating structure, which improves the uniformity of pressure distribution between the upper and lower heating plate assemblies during pressing.

[0018] Further, the lower cooling plate assembly, the lower plate, the flange, the hydraulic cylinder, the hydraulic station assembly and the accumulator constitute a pressure control stable hydraulic lifting system, so that the upper heating plate assembly and the lower heating plate assembly are pressed under the driving of the hydraulic pressure.

[0019] Further, the internal structure of the upper heating plate assembly includes heating pipe mounting holes, temperature sensor mounting holes and fixed heating pipe mounting holes.

[0020] Working principle: the uniformity of the temperature of the upper and lower heating plates is very important in the tablet pressing experiment by using the flat plate curing machine. The temperature of the upper and lower heating plates is controlled by three temperature sensors, which are individually controlled and use RKC temperature controller as the temperature controller, so as to ensure the uniformity of the temperature of the upper and lower heating plates. The temperature rising mode has three modes: full power rising, gradient rising and slope rising, which can meet the requirements of different experimental materials on the temperature rising mode. The machine is provided with preheating limit, which can ensure that the preheating of the material is only under the gravity of the upper heating plate assembly, so that the floating structure can improve the uniformity of the pressure distribution between the upper and lower heating plate assemblies. The control system uses PLC controller and color touch screen, and the man-machine interface operation system can set multiple pressure and pressure holding time, set exhaust times, exhaust pressure film time and exhaust residence time, display temperature curve and pressure curve, and has alarm query function. The hydraulic system uses accumulator and proportional hydraulic system to control the pressure accurately and stably, and the speed can be adjusted. The device is provided with threshold and emergency stop button, which can stop the hydraulic cylinder when the safety door is opened or the emergency stop button is pressed, so as to ensure the safety of the person and the equipment.

[0021] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples. The refinements, modifications, additions or replacements made by the ordinary skilled in the art within the essential scope of the present application also belong to the protection scope of the present application.

Claims

1. A new type of laboratory press comprising a frame, a sheet metal housing, a hydraulic device, characterized in that, The frame body (1) is fixed with a hydraulic station assembly (3) and an accumulator (25), the frame body (1) is fixed with a support plate (4), a counterweight plate (23) and an electric control box (24), the support plate (4) is fixed with a hydraulic cylinder (2) below, the hydraulic cylinder (2) is connected with a flange (6), the support plate (4) is fixed with a large guide column (14), a lower limit (5) and a door limit (19), the large guide column (14) is connected with an upper plate (13) and a self-locking nut (20), the upper plate (13) is fixed with a preheating limit (18), an upper plate stud (15) passes through the upper plate (13) and is connected with an upper heating plate assembly (12), the upper plate (13) is connected with a small guide column (28) and a lock nut (27), the small guide column (28) passes through a middle plate (10) to make the middle plate (10) suspended outside the surface of the large guide column (14), the middle plate (10) is fixed with an upper cooling plate assembly (9) below, the upper plate stud (15) is connected with a gasket (16) and an adjusting nut (17), the upper heating plate assembly (12) is suspended below the upper plate (13) through the upper plate stud (15), the upper heating plate assembly (12) is connected with a junction box (26), the flange (6) is fixed with a lower plate (7), the lower plate (7) is fixed with a lower cooling plate assembly (8), the lower plate (7) is connected with a lower guide column sleeve (22), the middle plate (10) is fixed with a lower heating plate assembly (11), the middle plate (10) is connected with a middle plate guide column sleeve (21), the large guide column (14) passes through the middle plate guide column sleeve (21) and the lower guide column sleeve (22).

2. A new type of laboratory press according to claim 1, characterized in that, The upper heating plate assembly (12), the upper plate stud (15), the gasket (16), the adjusting nut (17) and the preheating limit (18) form a floating structure of the upper heating plate assembly (12), so that the pressure distribution uniformity between the upper and lower heating plate assemblies is improved when pressing.

3. A new type of laboratory press according to claim 1, characterized in that, The lower cooling plate assembly (8), the lower plate (7), the flange (6), the hydraulic cylinder (2), the hydraulic station assembly (3) and the accumulator (25) form a pressure control stable hydraulic lifting system, so that the upper heating plate assembly (12) and the lower heating plate assembly (11) can be pressed under the driving of the hydraulic pressure.

4. A new type of laboratory press according to claim 1, characterized in that, The internal structure of the upper heating plate assembly (12) includes a heating pipe mounting hole (201), a temperature sensor mounting hole (202) and a fixed heating pipe mounting hole (203), six heating pipes and three temperature sensors can be installed in the internal structure, the three temperature sensors are separately controlled, and the uniformity of the temperature of the heating plate can be ensured.

Images