Pipe mold with air cooling device
By setting an annular air outlet and a flow channel close to the extrusion outlet in the air cooling device of the pipe mold, the problem of poor cooling effect of traditional air cooling devices is solved, and more efficient pipe molding and better product quality are achieved.
Patent Information
- Application Number
- CN202311428084.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-31
- Publication Date
- 2025-05-02
AI Technical Summary
The air-cooling device of traditional large-diameter solid-wall pipe molds has poor cooling effect, resulting in large melting sags and obvious wall thickness deviations of the finished pipes, affecting the quality and appearance of the product.
A pipe mold with an air-cooling device is designed. The air-cooling device includes an annular air outlet and a diversion channel arranged near the extrusion outlet. The diversion channel guides the air-cooling medium from the extrusion outlet to the air inlet, and quickly takes away heat through the annular air outlet.
By rapidly cooling the annular air outlet close to the extrusion outlet, the pipe forming efficiency is improved, the probability of pipe blank sagging is reduced, the pipe wall thickness deviation is reduced, and the product quality and appearance are improved.
Smart Images
Figure CN119910879A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of plastic extrusion dies, and in particular to a pipe die with an air cooling device. Background Art
[0002] Traditional large-diameter solid-wall tube molds have air cooling devices at the core. When producing products, due to different startup methods, some use suction and some use exhaust. No matter what method is used, it is to take away the heat from the outlet mold to improve the quality and appearance of the product. However, the traditional air cooling device uses a bell mouth or a straight tube at the outlet to maximize the heat removal, and the fan model is increased, but these measures do not produce very good results. The quality and appearance of the products produced are not very good, especially the finished product of thick-walled tubes. The product sag is still very large, and the wall thickness deviation is very serious, which affects the quality and appearance of the product. Summary of the invention
[0003] In order to solve the above technical problems, the purpose of this application is to provide a pipe mold with an air cooling device.
[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a pipe mold with an air cooling device, the pipe mold includes a core mold with an input end and an output end, an outer mold body coaxially sleeved outside the core mold, and an extrusion channel formed between the outer mold body and the core mold, the outer mold body and the output end define an extrusion port of the extrusion channel, the output end is located at the rear side of the input end, at least part of the air cooling device is arranged close to the extrusion port, the air cooling device includes an air duct with an air inlet and an air outlet and a guide component arranged between the air inlet and the extrusion port, the air inlet is located at the rear side of the air outlet, the guide component has a guide channel for guiding the air-cooling medium from the inner side of the extrusion port to the air inlet, one end of the guide channel is connected to the air-cooling source fluid outside the pipe mold, and is arranged close to the inner wall surface of the extrusion port, the other end is connected to the air inlet, and the guide channel is radially inclined inward from back to front.
[0005] In the above technical solution, it is further preferred that one end of the guide channel is an annular air outlet coaxially arranged with the extrusion port.
[0006] In the above technical solution, it is further preferred that the annular air outlet is coaxially arranged with the air inlet.
[0007] In the above technical solution, it is further preferred that an outer wall surface of the guide channel and a plane where the air inlet is located have an angle α, and the angle α is 0°-15°.
[0008] In the above technical solution, it is further preferred that an inner wall surface of the guide channel and a plane where the air inlet is located have an angle β.
[0009] In the above technical solution, it is further preferred that the angle β is equal to the angle α.
[0010] In the above technical solution, it is further preferred that the area of the annular air outlet is larger than the area of the air inlet.
[0011] In the above technical solution, it is further preferred that the core mold has an inner cavity for accommodating at least part of the air cooling device, the diameter of the inner cavity at the output end is less than or equal to the outer diameter of the guide channel, and the outer diameter of the guide channel is smaller than the outer diameter of the output end.
[0012] Compared with the prior art, the present invention has the following beneficial effects: The air cooling device of the present application has an annular air port close to the extrusion port so as to quickly cool the extrusion port, improve the tube forming efficiency, reduce the probability of tube blank sagging, greatly reduce the wall thickness deviation of the tube wall, and improve the quality and appearance of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 A schematic diagram of the structure of a pipe mold with an air cooling device provided in an embodiment of the present application; Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.
[0014] Among them: 100, pipe mold; 1, core mold; 11, input end; 12, output end; 13, inner cavity; 2, outer mold body; 3, extrusion channel; 31, extrusion port; 4, air cooling device; 41, air duct; 411, air inlet; 412, air outlet; 42, first wind hood; 421, inner end; 422, outer end; 43, second wind hood; 431, rear end; 44, guide channel; 441, annular air outlet. DETAILED DESCRIPTION
[0015] To describe the technical content, structural features, achieved purpose and effect of the application in detail, the technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of 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, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.
[0016] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.
[0017] The “front” and “back” mentioned in this application are as follows: Figure 1 Before and after shown.
[0018] An embodiment of the present application provides a pipe mold with an air cooling device, which is used to extrude molten material into a pipe blank, and is particularly suitable for thick-walled pipes.
[0019] like Figure 1 As shown, the pipe mold 100 includes a core mold 1, an outer mold body 2, an extrusion channel 3 and an air cooling device 4. The core mold 1 has an input end 11 and an output end 12 that are opposite to each other at the front and rear ends, and the input end 11 is located in front of the output end 12; the outer mold body 2 is coaxially sleeved on the outside of the core mold 1, and an extrusion channel 3 is formed between the outer mold body 2 and the core mold 1. The rear end of the outer mold body 2 and the output end 12 define an extrusion port 31 of the extrusion channel 3. The molten material is transported from front to back in the extrusion channel 3, and is finally extruded from the extrusion port 31 to form a tube blank of the pipe.
[0020] The core mold 1 has an inner cavity 13 for accommodating at least part of the air cooling device 4. At least part of the air cooling device 4 is arranged close to the extrusion port 31 to take away the heat at the extrusion port 31, reduce the temperature at the extrusion port 31, and improve the tube forming efficiency.
[0021] like Figure 1 , 2As shown, the air cooling device 4 includes an air duct 41 extending from front to back in the inner cavity 13 and a guide component arranged between the air duct 41 and the extrusion port 31 , wherein the guide component has a guide channel 44 for guiding the air cooling medium from the inner side of the extrusion port 31 to the air duct 41 .
[0022] The air duct 41 has an air inlet 411 and an air outlet 412 . The air inlet 411 is located at the output end 12 , and the air outlet 412 is located at the input end 11 . The cooling air passes through the core mold 1 from the back to the front.
[0023] The flow guide component includes a first wind hood 42 connected to the air inlet and a second wind hood 43 arranged at the rear side of the first wind hood 42. The first wind hood 42 is in a truncated cone shape. The first wind hood 42 has an inner end 421 connected to the air inlet 411 and an outer end 422 close to the extrusion port 31. The diameter of the first wind hood 42 gradually increases from the inner end 421 to the outer end 422, and the outer end 422 is located at the rear side of the inner end 421.
[0024] The second wind shield 43 is coaxially arranged with the first wind shield 42 and blocks the rear of the air duct 41. The second wind shield 43 is conical. The first wind shield 42 and the second wind shield 43 define a guide channel 44. The inner end 421 of the first wind shield 42 defines a gap connecting the guide channel 44 and the air duct 41. The inclined surface connected between the inner end 421 and the outer end 422 of the first wind shield 42 constitutes the outer wall surface of the guide channel 44. The air inlet 411 is located on a plane W perpendicular to the axis of the air duct 41. There is an angle α between the outer wall surface of the guide channel 44 and the plane W, and the angle α is 0°-15°. The inclined surface between the front end and the rear end 431 of the second wind shield 43 constitutes the inner wall surface of the guide channel 44. There is an angle β between the inner wall surface and the plane W. In the embodiment of the present application, the angle β is equal to the angle α. The guide channel 44 is radially inclined inward from the back to the front. The guide channel 44 with a steeper slope is conducive to the transportation of cooling air.
[0025] An annular air port 441 of the guide channel 44 is formed between the rear end 431 of the second air hood 43 and the outer end 422 of the first air hood 42. The annular air port 441 is one end of the guide channel 44 close to the extrusion port 31 and is connected to the air cooling source, and the other end of the guide channel 44 is connected to the air inlet 411; the annular air port 441 is coaxially arranged with the extrusion port 31 and close to the inner wall surface of the extrusion port 31. The cooling air enters the guide channel 44 from the annular air port 441, and then leaves the pipe mold 100 from the input end 11 of the core mold 1 through the connected air duct 41. In the embodiment of the present application, the area of the annular air port 441 is larger than the area of the air inlet 411, which effectively increases the air volume of the annular air port 441, and the steeper slope of the guide channel 44 accelerates the speed of the cooling air flowing through the annular air port 441, quickly takes away the heat at the extrusion port 31 to reduce the temperature at the extrusion port 31.
[0026] The outer diameter of the first hood 42 is greater than or equal to the diameter of the inner cavity 13 at the output end 12, and is smaller than the outer diameter of the output end 12, so that the annular tuyere 441 is close to the extrusion port 31, and the heat of the extrusion port 31 can be quickly taken away when the pipe mold 100 is working, which is conducive to the rapid cooling and forming of the tube billet extruded from the extrusion port 31, and the deformation of the tube billet that has not been cooled and formed for a long time under the influence of gravity is avoided, which affects the quality of the final product, and improves the shaping efficiency of the subsequent shaping device. The outer diameter of the second hood 43 is smaller than the outer diameter of the first hood 42 to form an annular tuyere 441 with an area larger than the cross-sectional area of the air duct 41.
[0027] The air cooling device of the present application has an annular air port close to the extrusion port so as to quickly cool the extrusion port, improve the tube forming efficiency, reduce the probability of tube blank sagging, greatly reduce the wall thickness deviation of the tube wall, and improve the quality and appearance of the product.
[0028] The above shows and describes 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, and the above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, and the scope of protection required by the present application is defined by the attached claims, description and their equivalents.
Claims
1. A pipe mold with an air cooling device, the pipe mold comprising a core mold having an input end and an output end, an outer mold body coaxially sleeved outside the core mold, and an extrusion channel formed between the outer mold body and the core mold, the outer mold body and the output end define an extrusion port of the extrusion channel, the output end is located at the rear side of the input end, characterized in that: At least part of the air cooling device is arranged close to the extrusion port, and the air cooling device includes an air duct with an air inlet and an air outlet, and a guide component arranged between the air inlet and the extrusion port, the air inlet is located at the rear side of the air outlet, and the guide component has a guide channel for guiding the air-cooling medium from the inner side of the extrusion port to the air inlet, one end of the guide channel is connected to the air-cooling source fluid outside the pipe mold and is arranged close to the inner wall surface of the extrusion port, and the other end is connected to the air inlet, and the guide channel is radially inclined inward from back to front.
2. The pipe mold according to claim 1, characterized in that: One end of the guide channel is an annular air outlet coaxially arranged with the extrusion port.
3. The pipe mold according to claim 2, characterized in that: The annular air outlet is coaxially arranged with the air inlet.
4. The pipe mold according to claim 2, characterized in that: An angle α is formed between the outer wall surface of the guide channel and the plane where the air inlet is located, and the angle α is 0°-15°.
5. The pipe mold according to claim 4, characterized in that: An inner wall surface of the guide channel and the plane where the air inlet is located form an angle β.
6. The pipe mold according to claim 5, characterized in that: The angle β is equal to the angle α.
7. The pipe mold according to claim 2, characterized in that: The area of the annular air outlet is larger than the area of the air inlet.
8. The pipe mold according to claim 1, characterized in that: The core mold has an inner cavity for accommodating at least part of the air cooling device, the diameter of the inner cavity at the output end is less than or equal to the outer diameter of the guide channel, and the outer diameter of the guide channel is smaller than the outer diameter of the output end.