Production method and production line of conducting tube

Abstract

The invention discloses a production method and a production line of a low-cost and high-intensity conducting tube prepared by a 'double-layer coextrusion-tensile reinforcement-billet tube coating' process. The production method comprises the following steps of: plastifying two different kinds of blended plastic; extruding the plastified plastic into a double-layer coextruded composite die head to form a double-layer coextruded composite billet tube; adhering the explosive fine powder to the inner wall of the billet tube uniformly through a die head mandril inner hole; cooling and shaping the composite billet tube; allowing the billet tube to enter a high-temperature heating box to perform preheating and drawing and then enter a cooling water tank to cool and shape; coating by using the die head of an extruder; cooling and removing water; rolling to form a finished product by using a rolling machine. The high-intensity conducting tube manufactured by a blended material and a new process can guarantee the advantages of the conventional conducting tube and can solve the problems of low tension intensity, inconvenience in construction due to softness of the tube, low yield, high energy consumption and the like of the conventional conducting tube. Special conducting tubes with special properties can be manufactured by changing the formula of inner and outer layers or the quality of the raw materials.

Description

technical field [0001] The patent of the invention relates to the field of civil blasting equipment, in particular to a production method and production line of a low-cost high-strength plastic nonel. Background technique [0002] At present, there are two main methods of manufacturing plastic (PE) detonators at home and abroad. The first one is the most common domestic single-extrusion single-layer ordinary detonator production technology, and the raw material is low-density polyethylene. The advantages of this method are: low cost and mature technology; the disadvantages are: low tensile strength, inconvenient construction of soft detonating tube, etc. Ordinary plastic detonators can withstand a tensile force of 70N at room temperature. In order to improve the tensile strength of the nonel, the raw material can be changed to blended plastic, and the tensile force at room temperature can be increased to 110N. There is also the use of detonation tube modification enhanceme...

AI Technical Summary

Problems solved by technology

The advantages of this method are: low cost and mature technology; the disadvantages are: low tensile strength, inconvenient construction of soft detonating tube, etc.

However, the tensile strength and production efficiency of plastic detonators are low

[0005] Detonation tube modification process and modification strengthening device (CN 14821111A) through multiple cold and hot stretching and setting, the molecular orientation arrangement of the original detonation tube is improved, and the tensile strength and oil resistance of the plastic detonation tube are improved. However, the plastic nonel produced has a single composition, and the composition of the inner and outer tube walls cannot be adjusted arbitrarily, so that it is impossible to prepare a special nonel with special properties (such as oil resistance, temperature resistance, etc.)

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