Dynamic forming method and device for large-diameter PVC pipe

A PVC pipe, dynamic forming technology, applied in the direction of tubular goods, household appliances, other household appliances, etc., can solve the problems of low cost, narrow PVC processing temperature range, etc., to achieve the effect of saving materials

Active Publication Date: 2014-03-26
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Compared with PE, the cost of PVC raw materials is low, and PVC pipes have a series of advantages such as corrosion resistance, oil resistance, acid and alkali resistance, pressure resistance, wear resistance, aging resistance and other incomparable advantages, making many

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  • Dynamic forming method and device for large-diameter PVC pipe
  • Dynamic forming method and device for large-diameter PVC pipe
  • Dynamic forming method and device for large-diameter PVC pipe

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[0030] The patent of the present invention is now described in detail in conjunction with the drawings as follows:

[0031] The present invention is a method and device for dynamic forming of large-caliber PVC pipes, which adopts extrusion, winding, and welding methods, and uses ultrasonic welding device 1 to develop a large-scale large-diameter large-diameter PVC pipe with low cost, accurate temperature control, energy saving and environmental protection, and continuous production. The dynamic forming method and device of the diameter PVC pipe, the ultrasonic welding temperature is controlled precisely, so as to avoid the degradation of PVC due to fusion welding, when producing the PVC pipe with a diameter of 2000mm or more, just replace the roller mold 3 with a larger diameter. It is difficult to produce large-caliber PVC pipes.

[0032] To achieve the above objective, the present invention provides a method and a method for dynamic molding of large-caliber PVC pipes, which inclu...

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Abstract

The invention aims to overcome the defect that the large-aperture PVC pipe is difficult to produce in the prior art and provides a dynamic forming method and device for a large-diameter PVC pipe. The forming device comprises an extruder, a baking oven, an ultrasonic welding device and a large-diameter roller mould. Plasticizing extrusion is performed on PVC special materials by an extruder, the PVC special materials are transferred through a conveying belt, and are heated again through the baking oven on the conveying belt, meanwhile, a motor pulls the materials at a high speed, so as to enable the materials to be oriented in the extrusion direction, finally, the materials are wound on the surface of the large-diameter roller mould, the mould rotates while performs rectilinear motion forwards, the component force for mould performing rectilinear motion enables the materials to be oriented in the axial direction of the mould, the gapes among materials are welded and sewed through the ultrasonic welding device, a cylindrical welding head is pressed on the PVC material and rotates together with the mould, so that synchronous extrusion winding and welding are achieved, and the cycle is shortened greatly due to continuous production. The mould is shrinkable, the demoulding is convenient, and when the PVC-O pipe with the diameter of 2,000 or even larger is produced, all that is needed is to replace the roller mould with larger diameter.

Description

technical field [0001] The invention relates to a large-diameter PVC pipe dynamic forming method and device, belonging to the field of pipe forming. technical background [0002] Large-diameter pipelines are the main arteries in the pipeline transportation industry. The development and production of high-strength, light-weight wear-resistant, impact-resistant, and corrosion-resistant large-caliber plastic pipes is one of the main development directions of the plastics industry in the future, and has been included in the "Current Priority Development" issued by the Ministry of Science and Technology and the State Planning Commission in July 1999. Guide to Key Areas of High-Tech Industries. [0003] At present, the general process of producing pipes is: the material is plasticized and extruded by the extruder, then enters the mold, and then passes through the sizing sleeve, spraying vacuum calibrating box and cooling water tank to cool and shape, then cuts and stacks to obtai...

Claims

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Application Information

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IPC IPC(8): B29C69/00B29L23/00
Inventor 杨卫民杨华光焦志伟丁玉梅
Owner BEIJING UNIV OF CHEM TECH
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