A ppr pipe extrusion production equipment

Abstract

PPR pipe extruding production equipment comprises an extruding machine including a machine body and a machine barrel, and a forming die connected with the extruding machine, wherein a cone-shaped double screw is arranged inside the machine barrel of the extruding machine, and is in clearance fit with the machine barrel; temperature control device groups with different temperature are sequentially arranged on the outer wall of the machine barrel in the motion direction of material; the forming die comprises at least two die cavities; each die cavity is provided with an opening mould and a core rod; a temperature control device is arranged at the tail end of each opening mould. According to the PPR pipe extruding equipment, the defects that a plastic part generates residual stress and products are gloomy and reluster due to the temperature difference at various sections of the machine barrel are avoided; the temperature compensation or temperature reduction can be performed at different sections as per the property of material to better mix material and improve the yield of products; besides, each die cavity adopts a structure of one mould with two cavity or one mould with multiple cavities to increase the output; the temperature control devices arranged at the tail ends of the opening moulds can provide temperature compensation or temperature reduction to reduce the pipe diameter variation caused by sudden pressure release, volume expansion or cooling when products leave from the opening moulds, so that the yield of products is improved.

Description

technical field

[0001] The invention relates to pipe production equipment, in particular to a PPR pipe extrusion production equipment. Background technique

[0002] Random copolymer polypropylene (PPR) pipe system has many advantages such as light weight, corrosion resistance, no fouling, long service life, convenient installation, reliable connection, etc. It has been widely used since it was introduced into China. The Ministry of Construction of my country has made PPR pipes for hot and cold water the first of the three major new plastic pipes to be promoted. In recent years, with the rapid development of my country's economy, the consumption of PPR pipes has also increased significantly, the market share has increased rapidly, and the development momentum has been rapid. In the field of cold and hot water transportation, the amount of PPR pipes occupies the first place, and the total consumption accounts for about 50% of all plastic pipes for cold and hot water transport...

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