Extrusion device

Abstract

The utility model discloses extrusion equipment which comprises a machine barrel and a screw rod, the machine barrel is provided with a plurality of sets of bidirectional cooling flow channels which are sequentially distributed from front to back, each set of bidirectional cooling flow channel spirally extends to form a first cooling flow channel and a second cooling flow channel from front to back, and the first cooling flow channels and the second cooling flow channels are alternately arranged in the axial direction of the machine barrel from front to back; the extrusion equipment further comprises a temperature control system, the temperature control system comprises a plurality of heaters, a plurality of fans, a first constant-temperature water tank communicated with the multiple sets of bidirectional cooling flow channels and a second constant-temperature water tank communicated with the cooling holes, and the first constant-temperature water tank is communicated with the multiple sets of bidirectional cooling flow channels. The machine barrel is sequentially divided into a plurality of areas from front to back, and each area is provided with a set of bidirectional cooling flow channels, at least one heater and at least one fan. The temperature of the machine barrel and the temperature of the screw are controlled through the heater in an air cooling and water cooling mode, and it is guaranteed that the extrusion equipment stably and efficiently extrudes fully-plasticized materials in a high-yield mode.

Description

Technical Field

[0001] This application relates to the technical field of plastic product production equipment, and particularly to an extrusion device. Background Art

[0002] In an extrusion device, a screw rotates in a barrel, causing the raw material to rub against the screw and the barrel, thereby gradually melting and plasticizing. Currently, in order to improve the plasticizing effect and efficiency, manufacturers set heaters on the barrel. By heating the barrel with the heaters, the temperature can be quickly increased, enabling the raw material to be quickly plasticized. However, due to the friction between the screw and the barrel and the heating effect of the heaters, the barrel and the screw are prone to overheating. The overheated screw and barrel will cause the material to burn in too high a temperature, resulting in waste of raw materials and reduction of production efficiency. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of this application is to provide an extrusion device.

[0004] To achieve the above object, this application adopts the following technical solution: An extrusion device includes a barrel extending from front to back and a screw rotatably arranged in the barrel. A plurality of groups of bidirectional cooling channels are arranged on the barrel in sequence from front to back. Each group of bidirectional cooling channels includes a first cooling channel and a second cooling channel that spirally extend from front to back on the outer surface of the barrel. The first cooling channel and the second cooling channel are alternately arranged from front to back in the axial direction of the barrel, and the flow directions of the first cooling channel and the second cooling channel are opposite. A cooling hole extending from front to back is formed in the core of the screw. The extrusion device further includes a temperature control system. The temperature control system includes a plurality of heaters, a plurality of blowers, a first constant temperature water tank communicated with the plurality of groups of bidirectional cooling channels, and a second constant temperature water tank communicated with the cooling hole. The barrel is sequentially divided into several regions from front to back, and each region is configured with a group of the bidirectional cooling channels, at least one heater, and at least one blower.

[0005] In the above technical solution, further preferably, a plurality of outer cover shells are sleeved outside each barrel. The plurality of outer cover shells are arranged in sequence from front to back. Each outer cover shell forms an accommodation space with the outer surface of the barrel. The heaters and the bidirectional cooling channels are arranged in the corresponding accommodation spaces. The blowers are installed on the corresponding outer cover shells and are in fluid communication with the corresponding accommodation spaces.

[0006] In the above technical solution, further preferably, the temperature control system further includes a controller and a plurality of temperature monitoring elements that are signal-connected to the controller. Each of the regions is configured with one of the temperature monitoring elements, and the temperature monitoring elements are used to detect the temperature of the corresponding regions.

[0007] In the above technical solution, further preferably, the plurality of heaters, the plurality of blowers, the first constant temperature water tank, and the second constant temperature water tank are signal-connected to the controller.

[0008] In the above technical solution, further preferably, a water cooling pipeline is connected between the first constant temperature water tank and the plurality of groups of two-way cooling channels. The water cooling pipeline includes a plurality of water delivery pipes and a plurality of control valves that are signal-connected to the controller. Each of the groups of two-way cooling channels is connected to the first constant temperature water tank by the water delivery pipes, and the control valves are respectively arranged at the water inlets of each of the groups of two-way cooling channels.

[0009] In the above technical solution, further preferably, a plurality of threaded portions are provided on the outer surface of the barrel. The plurality of threaded portions are arranged at intervals from front to back. Each of the threaded portions includes two thread grooves that helically extend from front to back, and the two thread grooves are alternately distributed axially on the barrel from front to back. A cooling water pipe is installed in each of the thread grooves, and each of the cooling water pipes is communicated with the water cooling pipeline.

[0010] In the above technical solution, further preferably, the cooling water pipe is a copper pipe with a diameter of 16 mm.

[0011] The present application has the following beneficial effects compared with the prior art:

[0012] The present application controls the temperature of the barrel and the screw by means of heaters, air cooling, and water cooling, so that the temperature of each region of the barrel and the temperature of the screw reach the temperature most favorable for material plasticization, thereby improving the plasticization effect and plasticization efficiency of the material; when the temperature of the barrel rises, the barrel is cooled by water cooling and air cooling at the same time, improving the cooling efficiency, effectively preventing the phenomenon of material burning due to equipment overheating, and ensuring that the extrusion equipment stably, efficiently, and highly produces fully plasticized materials. Description of the Drawings

[0013] Figure 1 is the front view of an extrusion device provided by an embodiment of the present application;

[0014] Figure 2 is Figure 1 the top view of the extrusion device in

[0015] Figure 3 isFigure 1 Schematic structural diagram of the screw in

[0016] Figure 4 is Figure 1 Schematic structural diagram of the barrel in

[0017] Figure 5 is Figure 4 Partial enlarged schematic diagram at position A in

[0018] Wherein: 100, extrusion equipment; 10, barrel; 101, thread groove; 1, cooling water pipe; 20, screw; 201, cooling hole; 30, temperature control system; 2, heater; 3, fan; 4, first constant temperature water tank; 5, second constant temperature water tank; 6, water cooling pipeline; 61, water delivery pipe; 7, cooling pipeline; 40, outer cover housing. Specific embodiments

[0019] [[ID=2I]]To describe in detail the technical content, structural features, achieved objectives and effects of the application, the technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, the various exemplary embodiments can also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, the various exemplary embodiments can be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shapes, structures and characteristics of the exemplary embodiments can be used or implemented in another exemplary embodiment.

[0020] The embodiments of the present application provide an extrusion equipment, as Figure 1 [[ID=Z6]]、 2 shown, the extrusion equipment 100 includes a barrel 10 extending from front to back, a screw 20 rotatably arranged in the barrel 10, and a temperature control system 30.

[0021] As Figure 1 、 4 、5 shown, a plurality of groups of bidirectional cooling channels are arranged on the outer surface of the barrel 10. The plurality of groups of bidirectional cooling channels are spaced apart from front to back. Each group of bidirectional cooling channels includes a first cooling channel and a second cooling channel spirally extending on the outer surface of the barrel 10. The first cooling channel and the second cooling channel are alternately arranged axially on the barrel 10 from front to back, and the flow directions of the first cooling channel and the second cooling channel are opposite. One cooling channel conveys cooling water from front to back, and the other cooling channel conveys cooling water from back to front, so as to quickly reduce the temperature of the barrel 10, and the bidirectional cooling channels improve the cooling efficiency.

[0022] In the embodiment of the present application, a plurality of threaded portions are formed on the outer surface of the barrel 10 from front to back. Each threaded portion has two thread grooves 101 that helically extend from front to back, and the two thread grooves 101 are alternately distributed along the axial direction of the barrel 10 from front to back. A cooling water pipe 1 extending along the thread groove 101 is installed in each thread groove 101. The inner wall surface of one cooling water pipe 1 defines a first cooling flow path, and the inner wall surface of the other cooling water pipe 1 defines a second cooling flow path. The water inlets and outlets of the two cooling water pipes 1 are opposite, so that cooling water flowing in opposite directions is input to rapidly cool the barrel 10.

[0023] As Figure 1 、 3 shown, a cooling hole 201 extending from front to back is formed in the core of the screw 20, and the screw 20 is cooled by introducing cooling water into the cooling hole 201.

[0024] As Figure 1 、 2 shown, the temperature control system 30 includes a plurality of heaters 2, a plurality of blowers 3, a first constant temperature water tank 4 communicating with a plurality of groups of two-way cooling flow paths, and a second constant temperature water tank 5 communicating with the cooling hole 201. The plurality of heaters 2 are arranged on the barrel 10 from front to back for heating the barrel 10. The plurality of blowers 3 are arranged in sequence from front to back for blowing air to the outer surface of the barrel 10 to accelerate the heat dissipation of the barrel 10. The first constant temperature water tank 4 is used to stably supply cooling water with a constant temperature to the plurality of groups of two-way cooling flow paths, and the second constant temperature water tank 5 is used to stably supply cooling water with a constant temperature to the cooling hole 201.

[0025] The barrel 10 is successively divided into a plurality of regions from front to back. Each region is configured with a group of two-way cooling flow paths, at least one heater 2 and at least one blower 3. The temperature control system 30 further includes a controller (not shown in the figure) and a plurality of temperature monitoring elements (not shown in the figure) signal-connected to the controller. The plurality of heaters 2, the plurality of blowers 3, the first constant temperature water tank 4 and the second constant temperature water tank 5 are signal-connected to the controller. One temperature monitoring element is configured for each region. The temperature monitoring element is used to detect the temperature of the corresponding region and transmit the detection result to the controller. The controller controls the operations of the plurality of heaters 2, the plurality of blowers 3, the first constant temperature water tank 4 and the second constant temperature water tank 5 based on the detection results of the respective temperature monitoring elements.

[0026] A plurality of outer cover shells 40 are sleeved outside each barrel 10. The plurality of outer cover shells 40 are successively arranged from front to back. Each outer cover shell 40 forms an accommodation space with the outer surface of the barrel. The heater 2 and the two-way cooling flow path are arranged in the corresponding accommodation space; the blower 3 is installed on the corresponding outer cover shell 40 and is in fluid communication with the corresponding accommodation space.

[0027] A water-cooling pipeline 6 is connected between the first constant-temperature water tank 4 and several groups of bidirectional cooling channels. The water-cooling pipeline 6 includes several water delivery pipes 61 and several control valves (not shown in the figure) that are signal-connected to the controller. A water delivery pipe 61 is connected between each group of bidirectional cooling channels and the first constant-temperature water tank 4. The cooling water pipe 1 is connected to the water delivery pipe 61 of the water-cooling pipeline 6, and a control valve is provided at the water inlet of each cooling water pipe. The controller controls the opening and closing of each control valve based on the temperature detection result. When the control valve is opened, the cooling water in the first constant-temperature water tank 4 is introduced into the cooling water pipe 1, and the cooling water conveyed in the cooling water pipe 1 can cool the barrel 10. In the embodiment of the present application, the cooling water pipe 1 is a copper pipe with a diameter of 16 mm. The conveying flow rate of the cooling water in the relatively thick cooling water pipe 1 is high, thereby improving the cooling efficiency of the barrel 10.

[0028] Each group of bidirectional cooling channels receives the cooling water in the first constant-temperature water tank 4 through the water-cooling pipeline 6, and conveys the water with an increased temperature after heat exchange with the barrel 10 back to the first constant-temperature water tank 4 through the water-cooling pipeline 6. The first constant-temperature water tank 4 cools the heated water and then circulates and outputs it.

[0029] A temperature-lowering pipeline 7 is also connected between the second constant-temperature water tank 5 and the cooling holes 201. A control valve signal-connected to the controller is also provided in the temperature-lowering pipeline 7. The second constant-temperature water tank 5 conveys cooling water into the screw 20 through the temperature-lowering pipeline 7, thereby reducing the temperature of the screw 20 and preventing the screw 20 from burning the material due to overheating during the plasticization of the material, ensuring the stable plasticization and plasticization efficiency of the screw 20 for the material. The working principle of the second constant-temperature water tank 5 is the same as that of the first constant-temperature water tank 4, and will not be elaborated here.

[0030] During the working process of the extrusion device 100, the temperature monitoring elements in each area monitor the temperature of the corresponding area in real time. The preset temperature range of each area is input in advance in the controller. When the temperature monitoring element detects that the real-time temperature of the corresponding area is lower than the preset temperature range, the controller controls the heater 2 in this area to turn on to heat the current area until the temperature of this area is within the preset temperature range; when the temperature monitoring element detects that the temperature of the corresponding area is higher than the preset temperature range, the controller controls the heater 2 in this area to turn off, and at the same time controls the control valve of the bidirectional cooling channel and the fan 3 in this area to turn on, so that the cooling water in the first constant-temperature water tank 4 enters the bidirectional cooling channel, and the two-way spiral-flowing cooling water cools the corresponding area of the barrel 10, and the fan 3 blows air to the surface of this area to improve the heat dissipation efficiency until the temperature of this area drops to within the preset temperature range. The temperature control system 30 controls the temperature of the barrel 10, so that each area of the barrel 10 is within a suitable temperature range. The suitable temperature is conducive to the plasticization of the material; the air cooling of the fan 3 and the water cooling of the bidirectional cooling channel cool the barrel 10 at the same time, quickly reducing the temperature of the corresponding area, improving the cooling efficiency, and effectively avoiding the influence of overheating on the quality of the material.

[0031] The above has shown and described the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements. The scope of protection required by the present application is defined by the appended claims, the specification and their equivalents.

Claims

1. An extrusion device, comprising a barrel extending from front to back and a screw rotatably arranged in the barrel, characterized in that, A plurality of groups of bidirectional cooling channels are arranged on the barrel in sequence from front to back. Each group of the bidirectional cooling channels includes a first cooling channel and a second cooling channel that spirally extend from front to back on the outer surface of the barrel. The first cooling channel and the second cooling channel are alternately arranged in the axial direction of the barrel from front to back, and the flow directions of the first cooling channel and the second cooling channel are opposite; a cooling hole extending from front to back is formed in the core of the screw. The extrusion equipment further includes a temperature control system. The temperature control system includes a plurality of heaters, a plurality of blowers, a first constant temperature water tank communicated with the plurality of groups of bidirectional cooling channels, and a second constant temperature water tank communicated with the cooling hole. The barrel is sequentially divided into a plurality of regions from front to back, and each of the regions is configured with a group of the bidirectional cooling channels, at least one heater and at least one blower.

2. The extrusion device according to claim 1, characterized in that, A plurality of outer cover shells are sleeved outside each of the barrels. The plurality of outer cover shells are arranged in sequence from front to back. Each of the outer cover shells and the outer surface of the barrel form an accommodating space. The heater and the bidirectional cooling channel are arranged in the corresponding accommodating space; the blower is installed on the corresponding outer cover shell and is in fluid communication with the corresponding accommodating space.

3. The extrusion device according to claim 1, characterized in that, The temperature control system further includes a controller and a plurality of temperature monitoring elements signal-connected to the controller. Each of the regions is configured with one of the temperature monitoring elements, and the temperature monitoring element is used for detecting the temperature of the corresponding region.

4. The extrusion device according to claim 3, characterized in that, The plurality of heaters, the plurality of blowers, the first constant temperature water tank and the second constant temperature water tank are signal-connected to the controller.

5. The extrusion device according to claim 3, characterized in that, A water cooling pipeline is connected between the first constant temperature water tank and the plurality of groups of bidirectional cooling channels. The water cooling pipeline includes a plurality of water delivery pipes and a plurality of control valves signal-connected to the controller. The water delivery pipes are connected between each group of the bidirectional cooling channels and the first constant temperature water tank, and the control valves are respectively arranged at the water inlets of each group of the bidirectional cooling channels.

6. The extrusion device according to claim 5, characterized in that, A plurality of threaded portions are formed on the outer surface of the barrel. The plurality of threaded portions are arranged at intervals from front to back. Each of the threaded portions includes two threaded grooves spirally extending from front to back, and the two threaded grooves are alternately distributed in the axial direction of the barrel from front to back. A cooling water pipe is installed in each of the threaded grooves, and each of the cooling water pipes is communicated with the water cooling pipeline.

7. The extrusion device according to claim 6, characterized in that, The cooling water pipe is a copper pipe with a diameter of 16 mm.

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