Production method and production line of conducting tube

A production method and detonation tube technology are applied in the production method and production line field of low-cost high-strength plastic detonation tubes, which can solve the problems of low tensile strength, single composition of plastic detonation tubes, and inability to prepare detonation tubes, etc., to achieve Improve the tensile performance, improve the appearance performance, and improve the effect of material selection range

Inactive Publication Date: 2011-09-07
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 orientatio

Method used

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  • Production method and production line of conducting tube
  • Production method and production line of conducting tube
  • Production method and production line of conducting tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Two extruders 1￠25 / ￠50 controlled by two frequency conversion motors are used to plasticize two different blended plastics. The plasticizing temperature is 160°C, and the plasticizing time is 10 minutes. Among them, the plastic material and mass ratio squeezed into the outer layer are polyethylene / polypropylene / hydroquinone / vinyl alcohol / calcium carbonate=50 / 40 / 2 / 7 / 1, accounting for 70% of the mass of the embryo tube; squeezed into the core The high-viscosity polyethylene copolymer of the layer accounts for 30% of the germ tube mass;

[0055] (2) Extrude the plasticized material into the two-layer co-extrusion composite die head 2 to form a two-layer co-extrusion composite embryo tube. The outer diameter of the formed two-layer co-extruded composite embryo tube is 10mm, and the inner diameter is 5mm;

[0056] (3) Fine powder of explosives adheres evenly to the inner wall of the germ tube through the inner hole of the mandrel of the die head;

[0057] (4) The germ...

Embodiment 2

[0063] In plastic plasticization, the plasticizing temperature is 240°C, the plasticizing time is 2min, and the plastic material and mass ratio of the extruded plastic into the outer layer are polyethylene / polypropylene / p-phenylenediamine / vinyl alcohol / talcum powder=60 / 30 / 2 / 7 / 1, accounting for 50% of the mass of the embryo tube; the high-viscosity polyethylene copolymer extruded into the core layer accounts for 50% of the mass of the embryo tube; the outer diameter of the formed two-layer co-extruded composite embryo tube is 8mm, and the inner diameter is 4mm;

[0064] The cooling temperature of the water cooling box 3 is 25°C, the preheating temperature of the high temperature heating box 5 is 70°C, and the cooling temperature of the cooling water box 7 is 25°C.

[0065] After cooling and shaping, the embryo tube has an outer diameter of 1.8mm, an inner diameter of 1.0m, and a tensile strength of 150N; when coating, the plasticizing temperature of the extruder is 240°C, and ...

Embodiment 3

[0068] In plastic plasticization, the plasticizing temperature is 20°C, and the plasticizing time is 6 minutes. The plastic material and mass ratio of extruding into the outer layer are polyethylene / polypropylene / thiobisphenol / vinyl alcohol / sorbitol=40 / 50 / 2 / 7 / 1, accounting for 90% of the quality of the germ tube; extruding into the core layer The high-viscosity polyethylene copolymer accounts for 10% of the quality of the embryo tube; the outer diameter of the formed two-layer co-extruded composite embryo tube is 12mm, and the inner diameter is 6mm;

[0069] The cooling temperature of the water cooling box 3 is 5°C, the preheating temperature of the high temperature heating box 5 is 100°C, and the cooling temperature of the cooling water box 7 is 5°C.

[0070] The outer diameter of the embryo tube after cooling and setting is 2.2mm, the inner diameter is 1.4m, and the tensile strength is 150N; the plasticizing temperature of the extruder is 220°C during coating, and the die te...

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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...

Claims

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Application Information

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IPC IPC(8): C06C5/08
Inventor 钱华刘大斌占必文邓维其邓昭明彭文林聂煜聂祥进井志明潘峰
Owner NANJING UNIV OF SCI & TECH
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