A screw temperature control device for a plastic extruder

Abstract

The utility model relates to the technical field of plastic extruder, especially a screw temperature control device of plastic extruder, including bearing unit, bearing unit, including extrusion main part, the inside installation of extrusion main part has extrusion pipe, the outside of extrusion pipe is sleeved and has heating jacket, and the bottom of extrusion main part is installed drive motor, extrusion unit, including the extrusion screw that is located extrusion pipe's by inside to outside activity and is connected, the outside swing joint of extrusion screw one end has mechanical seal flange, the inside swing of mechanical seal flange inserts has ball, and the inside of extrusion screw is set up cooling cavity, cooling unit, including the return pipe and delivery pipe that are located mechanical seal flange outside thread connection, one end of return pipe is penetrated and has cooling box, and the side bolt connection of cooling box has pump machine, and one end of pump machine hot melt connection has delivery pipe, through mechanical seal flange, cooling cavity, delivery pipe and return pipe, improved the cooling effect, not only will not influence plasticization efficiency, also will not influence plasticization quality.

Description

Technical Field

[0001] This utility model relates to the field of plastic extruder technology, specifically to a screw temperature control device for a plastic extruder. Background Technology

[0002] The screw temperature control device of a plastic extruder is a key component in the extrusion molding process. Its main function is to ensure that the plastic raw material has stable plasticization quality, flow properties and product precision during the extrusion process by accurately controlling the screw temperature.

[0003] Existing patent document CN213441094U discloses a screw temperature control device for a plastic extruder, including a temperature controller body, a terminal block, and a pressure plate. The temperature controller body has a terminal interface on its back. Fixing plates are fixed to the temperature controller body on both sides of the terminal interface. A threaded rod is threaded onto each fixing plate. A handwheel is fixed to one end of the threaded rod, and the other end of the threaded rod is rotatably connected to the middle of one side of the pressure plate via a rotating shaft. A rubber pad is fixed to the other side of the pressure plate, facing the terminal interface. The terminal block is inserted into the terminal interface, with its two sides held in place by the rubber pad. This invention has the advantage of providing a positioning mechanism at the connection between the terminal block and the temperature controller body, enhancing the stability of the terminal block connection.

[0004] However, in the existing screw temperature control devices for plastic extruders, the heating element typically conducts heat to the screw through the extrusion tube after emitting heat. Although this method can heat the screw to the required temperature, the temperature of the heating element needs to be reduced during the cooling process to achieve the cooling purpose. However, this method has poor cooling effect, which not only affects plasticizing efficiency but also plasticizing quality. To address this issue, we propose a screw temperature control device for plastic extruders. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a screw temperature control device for a plastic extruder, thereby solving the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a screw temperature control device for a plastic extruder, comprising a support unit, the support unit including an extrusion body, an extrusion tube installed inside the extrusion body, a heating sleeve sleeved on the outside of the extrusion tube, and a drive motor installed at the bottom of the extrusion body; an extrusion unit including an extrusion screw that is movably connected from the inside to the outside of the extrusion tube, a mechanical seal flange movably connected to the outside of one end of the extrusion screw, a ball bearing movably embedded in the inside of the mechanical seal flange, and a cooling chamber opened inside the extrusion screw; a cooling unit including a return pipe and a delivery pipe threadedly connected to the outside of the mechanical seal flange, a cooling box passing through one end of the return pipe, a pump bolted to one side of the cooling box, and a delivery pipe heat-fused to one end of the pump.

[0007] Preferably, a material preparation hopper is fixedly fixed through the top of the extrusion body, and the bottom end of the material preparation hopper is inserted and connected to the extrusion tube.

[0008] Preferably, a helical blade is welded to the outer side of the extrusion screw, and a drive wheel is keyed to the outer side of the extrusion screw away from the helical blade.

[0009] Preferably, the drive end of the drive motor is keyed to a drive wheel, and the outer side of the drive wheel is driven by a toothed belt, which is driven by the drive wheel.

[0010] Preferably, a liquid filling pipe is integrally formed on the top side of the cooling box, and an installation groove is provided at the bottom of the cooling box. A semiconductor cooling chip is embedded in the top of the inner side of the installation groove, and a cooling fan is bolted to the inner side of the installation groove.

[0011] Preferably, there are two mechanical seal flanges, one of which is threadedly connected to the return pipe and the other is threadedly connected to the delivery pipe.

[0012] This utility model provides a screw temperature control device for a plastic extruder, which has the following beneficial effects:

[0013] The screw temperature control device of this type of plastic extruder, through the setting of a mechanical seal flange, cooling chamber, delivery pipe, and return pipe, allows the operator to start the pump when the extrusion screw temperature is too high and needs to be cooled down. The pump draws coolant from inside the cooling tank, and the coolant enters the mechanical seal flange through the delivery pipe, then flows into the cooling chamber. The coolant absorbs heat and cools the extrusion screw. Subsequently, the coolant enters another mechanical seal flange through the cooling chamber and returns to the cooling tank through the return pipe. Therefore, the cooling effect is improved, and it does not affect the plasticizing efficiency or the plasticizing quality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a partial structural schematic diagram of the cooling box of this utility model;

[0016] Figure 3 This is a cross-sectional view of the cooling unit of this utility model;

[0017] Figure 4 This is a cross-sectional view of the extrusion unit of this utility model.

[0018] In the diagram: 1. Bearing unit; 101. Extrusion body; 102. Feed hopper; 103. Extrusion tube; 104. Heating jacket; 105. Drive motor; 106. Drive wheel; 107. Toothed belt; 2. Extrusion unit; 201. Extrusion screw; 202. Spiral blade; 203. Transmission wheel; 204. Mechanical seal flange; 205. Ball bearing; 206. Cooling chamber; 3. Cooling unit; 301. Cooling box; 302. Liquid inlet pipe; 303. Pump; 304. Delivery pipe; 305. Return pipe; 306. Mounting slot; 307. Semiconductor cooling chip; 308. Cooling fan. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a screw temperature control device for a plastic extruder, including a support unit 1, the support unit 1 including an extrusion body 101, an extrusion tube 103 installed inside the extrusion body 101, a heating sleeve 104 sleeved on the outside of the extrusion tube 103, and a drive motor 105 installed at the bottom of the extrusion body 101.

[0021] The extrusion unit 2 includes an extrusion screw 201 that is movably connected from the inside to the outside of the extrusion tube 103. A mechanical seal flange 204 is movably connected to the outer side of one end of the extrusion screw 201. A ball bearing 205 is movably embedded in the inner side of the mechanical seal flange 204. A cooling chamber 206 is provided inside the extrusion screw 201.

[0022] The cooling unit 3 includes a return pipe 305 and a delivery pipe 304 threadedly connected to the outside of the mechanical seal flange 204. One end of the return pipe 305 passes through the cooling box 301. A pump 303 is bolted to one side of the cooling box 301. One end of the pump 303 is heat-fused to the delivery pipe 304.

[0023] Furthermore, a material preparation hopper 102 is fixedly installed through the top of the extrusion body 101, and the bottom end of the material preparation hopper 102 is connected to the extrusion tube 103. The material preparation hopper 102 can be used to prepare plastic granules to avoid material shortage.

[0024] Furthermore, a spiral blade 202 is welded to the outside of the extrusion screw 201, and a drive wheel 203 is keyed to the side of the extrusion screw 201 away from the spiral blade 202. The spiral blade 202 can better transport the plastic, so that the plastic can be extruded from the extrusion tube 103.

[0025] Furthermore, the drive end of the drive motor 105 is keyed to a drive wheel 106, and the outer side of the drive wheel 106 is connected to a toothed belt 107. The toothed belt 107 is connected to the transmission wheel 203. When the drive motor 105 is started, the drive motor 105 drives the toothed belt 107 to rotate through the drive wheel 106, and the toothed belt 107 drives the extrusion screw 201 to rotate through the transmission wheel 203.

[0026] Furthermore, a liquid filling pipe 302 is integrally formed on the top side of the cooling box 301, and an installation groove 306 is provided at the bottom of the cooling box 301. A semiconductor cooling chip 307 is embedded in the top of the inner side of the installation groove 306, and a cooling fan 308 is bolted to the inner side of the installation groove 306. When the semiconductor cooling chip 307 is running, the cooling surface of the semiconductor cooling chip 307 cools the coolant, and at the same time, the heating surface of the semiconductor cooling chip 307 emits heat, and the cooling fan 308 can dissipate the heat.

[0027] Furthermore, two mechanical seal flanges 204 are provided. One mechanical seal flange 204 is threadedly connected to the return pipe 305, and the other mechanical seal flange 204 is threadedly connected to the delivery pipe 304. The mechanical seal flanges 204 enable the extrusion screw 201 to deliver coolant even during rotation.

[0028] Working Principle: After installation, first check the installation, fixation, and safety precautions of this utility model. When using the screw temperature control device of the plastic extruder, the operator adds plastic granules to the preparation hopper 102, and the plastic granules enter the extrusion tube 103. Then, the drive motor 105 is started. The drive motor 105 drives the toothed belt 107 to rotate through the drive wheel 106, and the toothed belt 107 drives the extrusion screw 201 to rotate through the transmission wheel 203. At this time, the extrusion screw 201 conveys the plastic granules through the spiral blade 202. At the same time, the heating jacket 104 emits heat and transfers it to the extrusion tube 103, thereby plasticizing the plastic granules. Simultaneously, the heat acts on the extrusion screw 201, and the plasticized plastic flows out from the extrusion tube 103. 03. When the temperature of the extrusion screw 201 is too high and needs to be cooled, the operator starts the pump 303. The pump 303 draws the coolant from the cooling tank 301. The coolant enters the mechanical seal flange 204 through the delivery pipe 304, and then flows into the cooling chamber 206. The coolant absorbs heat and cools the extrusion screw 201. Then, the coolant enters another mechanical seal flange 204 through the cooling chamber 206 and flows back into the cooling tank 301 through the return pipe 305. At the same time, the semiconductor refrigeration chip 307 operates, and the cooling surface of the semiconductor refrigeration chip 307 cools the coolant. This completes the use of this utility model. This utility model has a simple structure and is safe and convenient to use.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw temperature control device for a plastic extruder, comprising a support unit (1), characterized in that: The supporting unit (1) includes an extrusion body (101), an extrusion tube (103) installed inside the extrusion body (101), a heating sleeve (104) sleeved on the outside of the extrusion tube (103), and a drive motor (105) installed at the bottom of the extrusion body (101); the extrusion unit (2) includes an extrusion screw (201) located in the extrusion tube (103) and movably connected from the inside to the outside, a mechanical seal flange (204) movably connected to the outside of one end of the extrusion screw (201), and the mechanical seal flange (204) movably connected to the outside of one end of the extrusion screw (201). A ball bearing (205) is movably embedded inside the mechanical seal flange (204), and a cooling chamber (206) is opened inside the extrusion screw (201); the cooling unit (3) includes a return pipe (305) and a delivery pipe (304) threadedly connected to the outside of the mechanical seal flange (204), one end of the return pipe (305) passes through the cooling box (301), a pump (303) is bolted to one side of the cooling box (301), and a delivery pipe (304) is heat-fused to one end of the pump (303).

2. The screw temperature control device for a plastic extruder according to claim 1, characterized in that: The top of the extrusion body (101) is fixed with a material preparation hopper (102), and the bottom end of the material preparation hopper (102) is connected to the extrusion tube (103).

3. The screw temperature control device for a plastic extruder according to claim 1, characterized in that: The outer side of the extrusion screw (201) is welded with a spiral blade (202), and a drive wheel (203) is keyed to the outer side of the extrusion screw (201) away from the spiral blade (202).

4. The screw temperature control device for a plastic extruder according to claim 1, characterized in that: The drive motor (105) is keyed to a drive wheel (106), and a toothed belt (107) is driven to the outside of the drive wheel (106). The toothed belt (107) is driven to the drive wheel (203).

5. The screw temperature control device for a plastic extruder according to claim 1, characterized in that: A liquid filling pipe (302) is integrally formed on the top side of the cooling box (301), and an installation groove (306) is provided at the bottom of the cooling box (301). A semiconductor cooling chip (307) is embedded in the top of the inner side of the installation groove (306), and a cooling fan (308) is bolted to the inner side of the installation groove (306).

6. The screw temperature control device for a plastic extruder according to claim 1, characterized in that: Two mechanical seal flanges (204) are provided, one of which is threaded to the return pipe (305) and the other is threaded to the delivery pipe (304).

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