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Drip irrigation pipe head binding method

A bonding method and technology for drip irrigation pipes, which are applied in botany equipment and methods, climate change adaptation, gardening, etc., can solve problems such as difficult control, high defective rate, and drippers that have not been preheated, so as to improve productivity and Adhesive strength, effect of improving compressive strength

Inactive Publication Date: 2006-03-08
INST OF SOIL & WATER CONVERVATION CHINESE ACAD OF SCI +1
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Problems solved by technology

[0002] The existing drip irrigation pipe dripper bonding, first, the dripper has not been preheated; second, the formula of the dripper material and the tube embryo material is very different, and the tube embryo material is required to be soft and elastic, and it must be suitable for extrusion processing. Process conditions, the material is mainly high-pressure polyethylene, the melt index is generally 1 to 2, and the dripper has to withstand the impact of punching, which requires relatively high strength and hardness, and is suitable for the requirements of the injection molding process. The material is mainly low-pressure polyethylene. , the melt index is generally around 10, which requires the temperature of the machine head and die to be controlled at around 220°C, which is difficult to control
At the same time, due to the short time of the dripper in the machine head, it is difficult for the temperature of the dripper to approach the temperature of the tube embryo, resulting in insufficient bonding strength between the dripper and the tube embryo, and a high rate of defective products

Method used

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Embodiment Construction

[0007] The present invention will be further described below in conjunction with the accompanying drawings.

[0008] According to the technical scheme, the material formula and method steps are:

[0009] 1. Material preparation: The selection of dripper and tube embryo material is the basis of the processing technology, that is, the material must not only meet the performance of the product, the injection molding (extrusion) processing technology, but also meet the bonding processing technology. Therefore, (1) The dripper material should have certain strength and hardness, and it should also be suitable for the processing technology of injection molding. Its melt index is 6-8, and the material formula is high pressure polyethylene: low pressure polyethylene: medium density polyethylene = 2 : 6: 2 (mass ratio); tube embryo material should have a certain degree of flexibility to meet the extrusion process, its melt index is 6-8, and the material formula is high pressure polyethy...

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Abstract

The invention provides an emitter splicing method of drip irrigation pipe, including drip irrigation pipe and emitter materials provision and emitter splicing, its character: the formula for the emitter material, high pressure polythene : low pressure polythene : medium density polythene = 2: 6 : 2, the formula for pipe blank, high pressure polythene : linear polythene : low pressure polythene = 2 : 6 : 2, the melt index of the emitter and pipe blank materials is 6-8, the temperature of nose and mouth mould is 190-200 deg.C and the splicing strength is high and stable. It is applied to splicing various inserted and sheet emitters of drip irrigation pipe.

Description

technical field [0001] The patent of the invention relates to the production, processing and technology of a drip irrigation pipe, in particular to a bonding method for drip irrigation pipe emitters. Background technique [0002] The existing drip irrigation pipe dripper bonding, first, the dripper has not been preheated; second, the formula of the dripper material and the tube embryo material is very different, and the tube embryo material is required to be soft and elastic, and it must be suitable for extrusion processing. Process conditions, the material is mainly high-pressure polyethylene, the melt index is generally 1 to 2, and the dripper has to withstand the impact of punching, which requires relatively high strength and hardness, and is suitable for the requirements of the injection molding process. The material is mainly low-pressure polyethylene. , The melt index is generally around 10, which requires the temperature of the head and die to be controlled at around ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C65/02A01G25/02
CPCY02A40/22
Inventor 牛文全陈泽沛吴普特蓝新民
Owner INST OF SOIL & WATER CONVERVATION CHINESE ACAD OF SCI
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