A vertical vulcanization heat insulation structure of a silicone rubber extruder

Abstract

The utility model relates to a silica gel extruder vertical vulcanization heat insulation structure, solve the problem that the current extruder head - vulcanization box between adopting annular air blowing cooling, the temperature of head rises obviously after long time operation, influence production's problem. The structure includes the frame, sets up the extruder on the frame, is provided with the extruder head at the front end of extruder, the extruder head sets up vertically downward, is provided with the heating vulcanization box below the extruder head, is provided with the annular exhaust hood between the extruder head and heating vulcanization box, the colloid that extruded the extruder head passes through the center of annular exhaust hood and enters heating vulcanization box, the annular exhaust hood sets up the annular air duct, evenly sets up the air intake in annular air duct inner wall, one side of annular air duct outer wall connects the air draught fan. The utility model uses the air draught structure, discharges the heat between the extruder head - vulcanization box to the remote place, has improved the heat insulation effect, has guaranteed that the extruder can long time steady operation.

Description

Technical Field

[0001] This utility model belongs to the field of extruders and relates to a colloidal extrusion vulcanization equipment, and particularly to a vertical vulcanization heat insulation structure for a silicone extruder. Background Technology

[0002] An extruder is a type of colloid molding equipment. Its working principle involves an annular flow channel inside the extruder, through which molten rubber is propelled forward under pressure. An extruder head is located at the front end of the extruder, and its design varies depending on the requirements, thus determining the cross-sectional structure of the extruded colloid. The extruder head operates at a relatively low temperature, allowing the molten rubber in the flow channel to cool rapidly after being extruded and molded. To improve product performance, the molded colloid typically undergoes vulcanization. Throughout the process, the operating temperature at the extruder head generally does not exceed 40°C, while the vulcanization temperature can reach approximately 500°C.

[0003] Figure 1 , 2 This is an existing vertical vulcanization extruder. In this equipment, the extruder head is set vertically downward. Compared with the horizontal extruder head, this downward extrusion method results in better product uniformity in all directions, but the space below the extruder head is also relatively limited. Figure 1 , 2 Below the extruder head 3 is the vulcanizing box 4. An annular air blowing device 5 is installed between the extruder head and the vulcanizing box. The annular air blowing device is connected to a blower 6. The extruded product passes through the middle of the annular air blowing device. The annular air blowing device blows air rapidly, forming an air film between the extruder head and the vulcanizing box to insulate heat. However, this structure cannot completely insulate heat. After working for 1-2 hours, the air blown out by the annular device gradually becomes hot, which will cause the temperature of the extruder head to rise to about 80-100℃, affecting production. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the temperature of the extruder head rises significantly after long-term operation due to the use of annular air blowing for cooling between the extruder head and the vulcanizing box, which affects production. This invention provides a vertical vulcanization heat insulation structure for silicone extruders, which uses an exhaust structure to extract heat between the extruder head and the vulcanizing box and discharge it to a distance, thereby improving the heat insulation effect and ensuring that the extruder can operate stably for a long time.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a vertical vulcanization heat insulation structure for a silicone extruder, including a frame, an extruder mounted on the frame, an extruder head mounted at the front end of the extruder, the extruder head being vertically downward, a heating vulcanization box mounted below the extruder head, an annular exhaust hood being mounted between the extruder head and the heating vulcanization box, the colloid extruded from the extruder head passing through the center of the annular exhaust hood and entering the heating vulcanization box, the annular exhaust hood being provided with an annular air duct, exhaust ports being evenly arranged on the inner wall of the annular air duct, and an exhaust fan being connected to one side of the outer wall of the annular air duct.

[0006] This device employs a ventilation-type cooling and heat insulation structure. A ring-shaped exhaust hood is installed between the extruder head and the heating vulcanizing chamber to extract high-temperature gases and discharge them to a distance, maintaining the extruder head at a suitable operating temperature not exceeding 40°C for extended periods. The ring-shaped exhaust hood provides 360-degree ventilation without dead zones, effectively removing heat.

[0007] Preferably, the exhaust fan is a centrifugal fan, and the exhaust port of the centrifugal fan is arranged facing upwards. The exhaust port can be connected to an exhaust pipe to exhaust air to a higher location.

[0008] Preferably, a protective cover is provided on the outer side of the exhaust end of the exhaust fan, and the protective cover has perforated holes. The protective cover is used to prevent operators from accidentally touching and getting burned.

[0009] Preferably, an air inlet gap is left between the upper end of the annular exhaust hood and the extruder head. The upper end of the annular exhaust hood is the main air inlet, and the air flowing from all sides into the annular exhaust hood can continuously cool the extruder head.

[0010] Preferably, the lower end of the annular exhaust hood abuts against the top of the heating vulcanizing box.

[0011] Preferably, the distance between the lower end of the extruder head and the upper end of the heating vulcanizing box is 150-200mm.

[0012] Preferably, the extruder head temperature is 25-40℃, and the heating vulcanizing box temperature is greater than 450℃.

[0013] This invention employs a ventilation structure to extract heat from between the extruder head and the vulcanizing box and discharge it to a distance, thereby improving the heat insulation effect and ensuring that the extruder can operate stably for a long time. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of an existing extruder vulcanization insulation structure.

[0016] Figure 2 yes Figure 1 Schematic diagram of the structure at point A in the middle.

[0017] Figure 3 This is a schematic diagram of the structure of this utility model.

[0018] Figure 4 This is the utility model Figure 3 The structural diagram at point B in the diagram.

[0019] Figure 5 This is a cross-sectional view of the ventilation structure of this utility model.

[0020] In the diagram: 1. Frame, 2. Extruder, 3. Extruder head, 4. Heating vulcanizing box, 5. Annular blower, 6. Blower, 7. Annular exhaust hood, 8. Exhaust fan, 9. Exhaust vent, 10. Annular air duct, 11. Exhaust port. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0022] Example: A vertical vulcanization insulation structure for a silicone extruder, such as... Figure 3 , 4 As shown in Figure 5, this device includes a frame 1, on which an extruder 2 is mounted. An extruder head 3 is located at the front end of the extruder 2. The extruder head 3 is vertically downwards, and a heating vulcanizing chamber 4 is located below it. The distance between the lower end of the extruder head and the upper end of the heating vulcanizing chamber is 165 mm. The temperature of the extruder head is 35°C, and the temperature of the heating vulcanizing chamber is 500°C. An annular exhaust hood 7 is provided between the extruder head 3 and the heating vulcanizing chamber 4. The extruded colloid from the extruder head 3 passes through the central hole of the annular exhaust hood 7 and enters the heating vulcanizing chamber 4. An air inlet gap is left between the upper end of the annular exhaust hood 7 and the extruder head 3; the lower end of the annular exhaust hood 7 abuts against the top of the heating vulcanizing chamber 4.

[0023] like Figure 3 As shown, the annular exhaust hood 7 is equipped with an annular air duct 10, and exhaust ports 11 are evenly distributed on the inner wall of the annular air duct. An exhaust fan 8 is connected to one side of the outer wall of the annular air duct. The exhaust fan 8 is a centrifugal fan, and the exhaust port 9 of the centrifugal fan is set upward. The exhaust port is connected to the feed section of the extruder 2 to preheat the rubber material to be melted.

[0024] The exhaust fan has a protective cover on its outer side, and the protective cover has perforated holes.

[0025] During operation, the annular exhaust hood continuously extracts the high-temperature gas between the extruder head 3 and the heated vulcanizing box 4 and discharges it to a distance, which can maintain the extruder head at a suitable working temperature of no more than 40°C for a long time. Meanwhile, the annular exhaust hood 7 draws in air from the top, and the air flowing into the annular exhaust hood from all sides can continuously cool the extruder head 3.

Claims

1. A vertical vulcanization heat insulation structure for a silicone extruder, comprising a frame, an extruder mounted on the frame, and an extruder head at the front end of the extruder, characterized in that... The extruder head is vertically downward, and a heating and vulcanizing box is located below the extruder head. An annular exhaust hood is provided between the extruder head and the heating and vulcanizing box. The colloid extruded by the extruder head passes through the center of the annular exhaust hood and enters the heating and vulcanizing box. The annular exhaust hood is provided with an annular air duct, and exhaust ports are evenly arranged on the inner wall of the annular air duct. An exhaust fan is connected to one side of the outer wall of the annular air duct.

2. The vertical vulcanization heat insulation structure for a silicone extruder according to claim 1, characterized in that, The exhaust fan is a centrifugal fan, and the exhaust port of the centrifugal fan is set upward.

3. The vertical vulcanization heat insulation structure for a silicone extruder according to claim 1, characterized in that, The exhaust fan has a protective cover on its outer side, and the protective cover has perforated holes.

4. The vertical vulcanization heat insulation structure for a silicone extruder according to claim 1, characterized in that, An air inlet gap is left between the upper end of the annular exhaust hood and the extruder head.

5. The vertical vulcanization heat insulation structure for a silicone extruder according to claim 1, characterized in that, The lower end of the annular exhaust hood abuts against the top of the heating vulcanizing box.

6. The vertical vulcanization heat insulation structure for a silicone extruder according to claim 1, characterized in that, The distance between the lower end of the extruder head and the upper end of the heating and vulcanizing box is 150-200mm.

7. The vertical vulcanization heat insulation structure for a silicone extruder according to claim 1, characterized in that, The extruder head temperature is 25-40℃, and the heating vulcanizing box temperature is greater than 450℃.

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