Automatic extruding, calendering and vulcanizing mechanism for silica gel rubber products

Abstract

The utility model discloses an automatic extrusion calendering vulcanization mechanism for silica gel rubber products, which comprises an extrusion component, a calendering rack is arranged outside one side of the extrusion component, a calender is fixedly mounted on the calendering rack, an upper calendering roller is rotatably mounted in the calender, and a lower calendering roller is arranged below the upper calendering roller. A roller distance adjusting assembly is fixedly installed at the bottom end of the lower calendering roller, a magnetic grid displacement sensor is fixedly installed on a roller frame of the upper calendering roller, a magnetic head of the magnetic grid displacement sensor is installed on a rack of the lower calendering roller, and a drum type vulcanizing machine is arranged outside the side, away from the material extruding assembly, of the calender. According to the automatic extruding, calendering and vulcanizing mechanism, automatic extruding, calendering, vulcanizing and rolling work of silica gel rubber products can be automatically completed, the automation degree is high, interval adjustment during calendering is convenient, errors are small, the production efficiency is high, the production cost is low, the production cost is low, and the production efficiency is high. The problems of low speed and low precision caused by manual adjustment in the prior art are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon and rubber production equipment, in particular to an automatic extrusion, calendering and vulcanization mechanism for silicon rubber products. Background Art

[0002] Silicone rubber is also known as silica gel. Silicone rubber refers to a rubber whose main chain is composed of alternating silicon and oxygen atoms, and the silicon atom is usually connected to two organic groups. Ordinary silicone rubber is mainly composed of siloxane chains containing methyl and a small amount of vinyl. The introduction of phenyl groups can improve the high and low temperature resistance of silicone rubber, while the introduction of trifluoropropyl and cyano groups can improve the heat and oil resistance of silicone rubber. Silicone rubber has good low temperature resistance and can generally still work at -55°C. After the introduction of phenyl, it can reach -73°C. The heat resistance of silicone rubber is also outstanding. It can work for a long time at 180°C, and can withstand several weeks or longer at slightly above 200°C and still be elastic. It can instantly withstand high temperatures above 300°C;

[0003] Silicone rubber is divided into heat-cured type (high temperature vulcanized silicone HTV) and room temperature vulcanized type (RTV). Among them, the room temperature vulcanized type is further divided into condensation reaction type and addition reaction type. High temperature silicone rubber is mainly used to manufacture various silicone rubber products, while room temperature silicone rubber is mainly used as adhesive, potting material or mold. The heat-cured type has the largest usage. The heat-cured type is further divided into methyl silicone rubber (MQ), methyl vinyl silicone rubber (VMQ, with the largest usage and product brand), methyl vinyl phenyl silicone rubber PVMQ (low temperature resistance, radiation resistance), and others include nitrile silicone rubber, fluorosilicone rubber, etc.

[0004] Rubber refers to a highly elastic polymer material with reversible deformation. It is elastic at room temperature, can produce large deformation under very small external force, and can return to its original shape after the external force is removed. Rubber is a completely amorphous polymer with a low glass transition temperature (Tg). Its molecular weight is often large, greater than hundreds of thousands. Rubber is divided into two types: natural rubber and synthetic rubber. Natural rubber is processed from gum extracted from plants such as rubber trees and rubber grass; synthetic rubber is obtained by polymerization of various monomers. Rubber products are widely used in industry or various aspects of life;

[0005] In the existing silicone rubber and rubber production process, the raw materials of silicone rubber and rubber need to be extruded, calendered and vulcanized. The calendering work after extrusion is mostly performed by a calender. However, in actual use, the spacing between the two calendering rollers of the existing calendering mechanism needs to be manually adjusted. The manual adjustment has the problem of slow adjustment speed, which affects the work efficiency, and the manual adjustment spacing has poor accuracy, which affects the calendering thickness, thereby reducing the production quality of the product; and in the existing production process, after the silicone rubber is added with vulcanizing agent and the color is changed in the open mill, it is directly placed on a three-roller or five-roller calender to be calendered into a thin sheet, and then directly fed into a drum vulcanizer for vulcanization. When making some products with a thickness of more than 1MM, bubbles are inevitably generated in the colloid, which seriously affects the product quality. Utility Model Content

[0006] The utility model aims to provide an automatic extrusion, calendering and vulcanization mechanism for silicone rubber products to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic extrusion, calendering and vulcanization mechanism for silicone rubber products, comprising an extrusion component, a calendering frame is arranged on the outside of one side of the extrusion component, a calender is fixedly installed on the calendering frame, an upper calendering roller is rotatably installed in the calender, a lower calendering roller is arranged below the upper calendering roller, a roller spacing adjustment component is fixedly installed on the bottom end of the lower calendering roller, a magnetic grating displacement sensor is fixedly installed on the bearing seat of the upper calendering roller, the magnetic head of the magnetic grating displacement sensor is installed on the bearing seat of the lower calendering roller, a drum vulcanizer is arranged on the outside of the calender away from the extrusion component, and a winder is arranged on the outside of the drum vulcanizer away from the calender.

[0008] Preferably, a film discharge shaft is installed on the upper surface of the calender frame and located on one side of the calender.

[0009] Preferably, a vulcanizing heating roller is installed in the middle of the drum vulcanizer, a plurality of vulcanizing tension rollers are installed around the vulcanizing heating roller, and a laminating unloading shaft is installed on one side above the vulcanizing heating roller.

[0010] Preferably, the extrusion assembly includes an extrusion rack, an extrusion motor is fixedly mounted on the bottom end of the extrusion rack, an extrusion reduction box is fixedly mounted on the top upper surface of the extrusion rack, and the output shaft of the extrusion motor is connected to the input end of the extrusion reduction box via a belt drive.

[0011] Preferably, a screw extruder is provided at the output end of the extrusion reduction box, the inner screw of the screw extruder is fixedly connected to the output end of the extrusion reduction box, an injection port is fixedly installed on one side of the upper surface of the screw extruder, an extrusion die is fixedly installed at the discharge end of the screw extruder, and the output end of the extrusion die is connected to the input end of the calender.

[0012] Preferably, the roller spacing adjustment assembly comprises a servo motor, the output shaft of the servo motor is fixedly connected to an adjustment reducer, the output end of the adjustment reducer is fixedly connected to a lead screw, and the top end of the lead screw is externally threadedly connected to an adjustment support block.

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

[0014] The utility model of the silicone rubber automatic extrusion calendering vulcanization mechanism can automatically complete the automatic extrusion, calendering, vulcanization and winding of silicone rubber products, with a high degree of automation, convenient spacing adjustment during calendering, small error, and effectively solves the technical problems of slow speed and low precision caused by existing manual adjustment;

[0015] The use of a screw extruder can effectively avoid the technical problems of pores or material shortages that often exist in the production of silicone rubber or rubber products, so that there are no more bubbles in the product, effectively improving the product quality and yield rate;

[0016] At the same time, the magnetic grid displacement sensor can be used in conjunction with PLC and Dongfu motor to control the lifting and lowering adjustment. It has the characteristics of automatic spacing adjustment, convenient adjustment, fast speed, can greatly improve production efficiency, can make the thickness tolerance reach the most ideal state, effectively reduce errors, and improve the production quality of product calendering;

[0017] Due to the addition of a film unwinding shaft, the technical effect of vulcanizing multiple layers of fabric or film with rubber can be achieved in actual use; in addition, since many PET films have many exquisite patterns on their surfaces, by selecting this type of film material, after the rubber is calendered on the film, the silicone rubber product produced can have the same pattern as the film, which greatly enriches the variety and aesthetics of the product, improves the economic value, and has good market appeal;

[0018] Finally, by adding two discharge shafts, a film discharge shaft and a bonding discharge shaft 603, the discharge work can be performed during use, so that multiple layers of rubber can be bonded and vulcanized together, and the technical characteristics of multi-layer bonding and vulcanization of rubber of various colors can be realized. Two layers of cloth can be sandwiched between two layers of rubber or three layers of cloth can be sandwiched between two layers of rubber, which greatly expands the application field of the product, greatly expands the types and functions of the product, and produces greater economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the extrusion calendering vulcanization mechanism of the embodiment of the utility model;

[0020] Figure 2 The figure is a schematic structural diagram of the roller spacing adjustment mechanism according to an embodiment of the utility model.

[0021] In the figure: 1. extrusion assembly; 101. extrusion frame; 102. extrusion motor; 103. extrusion reduction box; 104. belt; 105. screw extruder; 106. injection port; 107. extrusion die; 2. calender frame; 3. calender; 301. upper calender roller; 302. lower calender roller; 4. roller distance adjustment assembly; 401. servo motor; 402. adjustment reduction box; 403. screw rod; 404. adjustment support block; 5. magnetic grid displacement sensor; 6. drum vulcanizer; 601. vulcanization heating roller; 602. vulcanization tension roller; 603. bonding unloading shaft; 7. winding roller; 8. film unloading shaft. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1-2The utility model provides an embodiment: an automatic extrusion calendering vulcanization mechanism for silicone rubber products, including an extrusion component 1, a calendering frame 2 is arranged on the outside of one side of the extrusion component 1, a calendering machine 3 is fixedly installed on the calendering frame 2, an upper calendering roller 301 is rotatably installed in the calendering machine 3, a lower calendering roller 302 is arranged below the upper calendering roller 301, and the spacing between the upper calendering roller 301 and the lower calendering roller 302 forms a calendering thickness, so that when the silicone rubber material passes between the upper calendering roller 301 and the lower calendering roller 302, the calendering work of the specified thickness can be completed, a roller spacing adjustment component 4 is fixedly installed at the bottom end of the lower calendering roller 302, a magnetic grid displacement sensor 5 is fixedly installed on the roller frame of the upper calendering roller 301, and the magnetic head of the magnetic grid displacement sensor 5 is installed on the bearing seat of the lower calendering roller 302;

[0026] The magnetic grid displacement sensor 5 is a magnetic grid displacement sensor, which is a displacement sensor that uses the magnetic action between the magnetic grid and the magnetic head to measure; it is a new type of digital sensor with low cost and easy installation and use;

[0027] When used in the utility model, the magnetic grid displacement sensor 5 can be used in conjunction with the magnetic head, and the magnetic grid displacement sensor 5 can detect the distance between the magnetic head and the magnetic head. By detecting the distance, the actual distance between the upper calendering roller 301 and the lower calendering roller 302 can be determined. In actual use, it has the effect of automatic electronic measurement of the distance, which can effectively improve the adjustment accuracy of the calendering roller distance.

[0028] A drum vulcanizer 6 is arranged outside the calender 3 on a side away from the extrusion component 1. The drum vulcanizer 6 is used to heat and vulcanize the silicone rubber material. A winder 7 is arranged outside the drum vulcanizer 6 on a side away from the calender 3. The winder 7 can wind up the vulcanized silicone rubber material.

[0029] Among them, a film discharge shaft 8 is installed on the upper surface of the calender frame 2 and located on one side of the calender 3, and the film discharge shaft 8 can perform a rotary discharge process on the film or cloth;

[0030] This structural design, in actual use, can achieve the technical effect of vulcanizing multiple layers of fabric or film with rubber material due to the addition of a film or fabric unwinding shaft (mainly used for unwinding inelastic fabric or film);

[0031] In addition, since many PET films have many exquisite patterns on their surfaces, by selecting this type of film material and calendering the rubber on the film, the silicone rubber products produced can have the same pattern as the film, which greatly enriches the product variety and aesthetics, improves the economic value, and has better market appeal.

[0032] In this embodiment, a vulcanizing heating roller 601 is installed in the middle of the drum vulcanizer 6. The rubber material passes through the vulcanizing heating roller 601 during production, so that the rubber material is heated and vulcanized by the vulcanizing heating roller 601.

[0033] A plurality of vulcanization tension rollers 602 are installed around the vulcanization heating roller 601. The vulcanization tension roller 602 can increase the tension force when the rubber material is conveyed, thereby preventing the rubber material from being loose. A laminating and unloading shaft 603 is installed on one side above the vulcanization heating roller 601. The laminating and unloading shaft 603 is a multi-layer laminating and unloading shaft.

[0034] The laminating and unwinding shaft 603 performs the unwinding work when in use. Due to the addition of a multi-layer laminating and unwinding shaft (mainly used for unwinding elastic fabrics), multiple layers of rubber can be laminated and vulcanized together, and the technical characteristics of multi-layer laminating and vulcanization of multiple colors of rubber can be realized, which greatly expands the types and functions of products and generates greater economic benefits.

[0035] In this embodiment, the extrusion assembly 1 includes an extrusion frame 101, an extrusion motor 102 is fixedly installed at the bottom end of the extrusion frame 101, and an extrusion reduction box 103 is fixedly installed on the top upper surface of the extrusion frame 101. The output shaft of the extrusion motor 102 and the input end of the extrusion reduction box 103 are connected by a belt 104, so that the extrusion motor 102 can drive the extrusion reduction box 103 to work through the belt 104, thereby achieving the purpose of rotation deceleration;

[0036] Furthermore, a screw extruder 105 is provided at the output end of the extrusion reduction box 103, and the inner screw of the screw extruder 105 is fixedly connected to the output end of the extrusion reduction box 103. The extrusion reduction box 103 can drive the screw of the screw extruder 105 to rotate, thereby completing the normal extrusion work of the screw extruder 105;

[0037] An injection port 106 is fixedly installed on one side of the upper surface of the screw extruder 105, and an extrusion die head 107 is fixedly installed at the discharge end of the screw extruder 105. The output end of the extrusion die head 107 is connected to the input end of the calender 3, so that the rubber material extruded through the extrusion die head 107 can enter the calender 3 for calendering.

[0038] In this embodiment, as shown in the attached specification Figure 2 As shown, the roller gap adjustment component 4 includes a servo motor 401, the output shaft of the servo motor 401 is fixedly connected to an adjustment reducer 402, the output end of the adjustment reducer 402 is fixedly connected to a screw rod 403, and the top end of the screw rod 403 is externally threadedly connected to an adjustment support block 404;

[0039] With this structural design, when it is necessary to adjust the spacing between the upper calendering roller 301 and the lower calendering roller 302, the servo motor 401 can drive the screw rod 403 to rotate by adjusting the reducer 402. Since the top end of the screw rod 403 is threadedly connected with an adjusting support block 404, when the screw rod 403 rotates, the adjusting support block 404 threadedly connected thereto will move up and down along the screw rod 403, thereby driving the lower calendering roller 302 to move by the up and down movement of the adjusting support block 404, thereby completing the spacing adjustment work between the two calendering rollers.

[0040] Working principle: When the extrusion calendering vulcanization mechanism of the utility model is working, the materials of silicon and rubber products can enter the screw extruder 105 through the injection port 106, and the extrusion motor 102 can drive the extrusion reduction box 103 to work through the belt 104. At this time, the extrusion reduction box 103 can drive the screw of the screw extruder 105 to rotate, so that the rubber material inside the screw extruder 105 can be frequently spirally extruded, and the extruded rubber material enters the calender 3 through the extrusion die head 107;

[0041] Before the rubber material enters the calender 3, the film discharge shaft 8 performs the film discharge processing synchronously, so that the film used for rubber material production is placed in the calender 3, and the rubber material can contact the film after entering;

[0042] At this time, the extruded rubber material passes through the gap between the upper calendering roller 301 and the lower calendering roller 302 in the calendering machine 3, so that the calendering work of the rubber material is completed by the rotation between the upper calendering roller 301 and the lower calendering roller 302;

[0043] The calendered rubber material enters the drum vulcanizer 6, and the vulcanization tension roller 602 of the drum vulcanizer 6 is used for conveying (the conveying line is shown in the attached manual). Figure 1 As shown, during the conveying process, the rubber material passes through the vulcanizing heating roller 601, so that the rubber material in the conveying process is heated by the vulcanizing heating roller 601 to produce a thermal vulcanization reaction. After the material is discharged from the drum vulcanizer 6, the rubber material reaches an ideal vulcanization state;

[0044] At this time, the winding machine 7 can effectively wind up the vulcanized silicon and rubber materials, completing the automatic extrusion, calendering and vulcanization of silicone rubber products;

[0045] When the spacing between the upper calendering roller 301 and the lower calendering roller 302 needs to be adjusted, the servo motor 401 can drive the screw rod 403 to rotate by adjusting the reducer 402. Since the top of the screw rod 403 is threadedly connected with an adjusting support block 404, when the screw rod 403 rotates, the adjusting support block 404 threadedly connected thereto will move up and down along the screw rod 403, thereby driving the lower calendering roller 302 to move by adjusting the support block 404 up and down, thereby completing the spacing adjustment work between the two calendering rollers.

[0046] At the same time, the utility model is provided with a magnetic grid displacement sensor 5 and a magnetic head used in conjunction with it. The magnetic grid displacement sensor 5 can measure the actual spacing between the two rollers by cooperating with the magnetic head, and transmit the signal to the PLC controller of the machine control assembly. The PLC controller compares the actual spacing with the preset adjustment spacing. When a positive error or a negative error is found, a forward or reverse signal is sent to the servo motor 401, thereby driving the screw rod 403 to rotate, so that the screw rod 403 drives the lower calendering roller 302 to move again. During this adjustment, the magnetic grid displacement sensor 5 measures the actual adjustment spacing. At this time, the actual measured data is compared with the required spacing numerical data, so that the adjustment signal is sent to the servo motor 401 through the PLC of the mechanism for up and down lifting and lowering adjustment. Finally, the required roller spacing distance between the upper calendering roller 301 and the lower calendering roller 302 can be achieved, thereby completing the use effect of automated high-precision adjustment.

[0047] It should also be noted that the data transmission and control effect between the magnetic grating displacement sensor and the PLC and servo motor is a common and simple control technology solution in the existing PLC control field, which is a mature existing technology and will not be described in detail in this manual;

[0048] In summary, the automatic extrusion, calendering and vulcanization mechanism of silicone rubber of the utility model can automatically complete the automatic extrusion, calendering, vulcanization and winding of silicone rubber products, with high degree of automation, convenient adjustment and small error;

[0049] The use of a screw extruder can effectively avoid the technical problems of pores or material shortages that often exist in the production of silicone rubber or rubber products, so that there are no more bubbles in the product, effectively improving the product quality and yield rate;

[0050] At the same time, the magnetic grid displacement sensor can be used in conjunction with PLC and Dongfu motor to control the lifting and lowering adjustment. It has the characteristics of automatic spacing adjustment, convenient adjustment, fast speed, can greatly improve production efficiency, can make the thickness tolerance reach the most ideal state, effectively reduce errors, and improve the production quality of product calendering;

[0051] Due to the addition of a film unwinding shaft, the technical effect of vulcanizing multiple layers of fabric or film with rubber can be achieved in actual use; in addition, since many PET films have many exquisite patterns on their surfaces, by selecting this type of film material, after the rubber is calendered on the film, the silicone rubber product produced can have the same pattern as the film, which greatly enriches the variety and aesthetics of the product, improves the economic value, and has good market appeal;

[0052] Finally, by adding two discharge shafts, namely the film discharge shaft 8 and the bonding discharge shaft 603, the discharge work can be performed during use, so that multiple layers of rubber can be bonded and vulcanized together, and the technical characteristics of multi-layer bonding and vulcanization of rubber of various colors can be realized. Two layers of cloth can be sandwiched between two layers of rubber or three layers of cloth can be sandwiched between two layers of rubber, which greatly expands the application field of the product, greatly expands the types and functions of the product, and produces greater economic benefits.

[0053] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An automatic extrusion, calendering and vulcanization mechanism for silicone rubber products, comprising an extrusion component (1), characterized in that: A calender frame (2) is arranged outside one side of the extrusion component (1), a calender (3) is fixedly installed on the calender frame (2), an upper calender roller (301) is rotatably installed in the calender (3), a lower calender roller (302) is arranged below the upper calender roller (301), a roller spacing adjustment component (4) is fixedly installed at the bottom end of the lower calender roller (302), a magnetic grating displacement sensor (5) is fixedly installed on the bearing seat of the upper calender roller (301), and the magnetic head of the magnetic grating displacement sensor (5) is installed on the bearing seat of the lower calender roller (302), a drum vulcanizer (6) is arranged outside the side of the calender (3) away from the extrusion component (1), and a winder (7) is arranged outside the side of the drum vulcanizer (6) away from the calender (3).

2. The automatic extrusion, calendering and vulcanization mechanism for silicone rubber products according to claim 1, characterized in that: A film discharge shaft (8) is installed on the upper surface of the calender (3) frame (2) and located on one side of the calender (3).

3. The automatic extrusion, calendering and vulcanization mechanism for silicone rubber products according to claim 1, characterized in that: A vulcanizing heating roller (601) is installed in the middle of the drum vulcanizer (6), a plurality of vulcanizing tension rollers (602) are installed around the vulcanizing heating roller (601), and a bonding unloading shaft (603) is installed on one side above the vulcanizing heating roller (601).

4. The automatic extrusion, calendering and vulcanization mechanism for silicone rubber products according to claim 1, characterized in that: The extrusion assembly (1) comprises an extrusion frame (101), an extrusion motor (102) is fixedly mounted on the bottom end of the extrusion frame (101), an extrusion reduction box (103) is fixedly mounted on the top upper surface of the extrusion frame (101), and the output shaft of the extrusion motor (102) and the input end of the extrusion reduction box (103) are connected by a belt (104).

5. The automatic extrusion, calendering and vulcanization mechanism for silicone rubber products according to claim 4, characterized in that: A screw extruder (105) is provided at the output end of the extrusion reduction box (103); an inner screw of the screw extruder (105) is fixedly connected to the output end of the extrusion reduction box (103); an injection port (106) is fixedly installed on one side of the upper surface of the screw extruder (105); an extrusion die head (107) is fixedly installed at the discharge end of the screw extruder (105); and the output end of the extrusion die head (107) is connected to the input end of the calender (3).

6. The automatic extrusion, calendering and vulcanization mechanism for silicone rubber products according to claim 1, characterized in that: The roller spacing adjustment component (4) comprises a servo motor (401), the output shaft of the servo motor (401) is fixedly connected to an adjustment reducer (402), the output end of the adjustment reducer (402) is fixedly connected to a lead screw (403), and the top end of the lead screw (403) is externally threadedly connected to an adjustment support block (404).

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