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Resin base tobacco packaging machine mould box and preparing method

A resin-based, tobacco machinery technology, applied in the direction of packaging cigarettes, etc., can solve the problems of short mold box life and high cost of use, and achieve the effects of low cost, reduced production cost and excellent performance

Inactive Publication Date: 2007-12-12
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to propose a thermoplastic polyimide substrate with high temperature resistance, good wear resistance and low cost in order to overcome the above-mentioned technical problems of high cost of foreign mold boxes and short service life of domestic mold boxes. Material cigarette machine mold box and preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A thermoplastic polyimide-based cigarette machine mold box, comprising the following process steps: TPI with a mass fraction of 70%, PTFE with 10% and MoS with 5% 2 After mechanical mixing, it is added to an extruder, and at the same time, 15% CF is added to obtain composite pellet particles, and the particles are prepared by injection molding to obtain samples and cigarette machine mold boxes. The injection molding process conditions are as follows: the injection molding temperature is 360°C, the injection molding pressure is 150MPa, and the mold temperature is 150°C. Its properties are as follows: bending strength 190MPa, elastic modulus 4.5GPa, thermal expansion coefficient 3.6×10 -5 / ℃, friction coefficient 0.08, volume friction rate 5.0×10 -15 m 3 / (N.m); The mold box for G.Dx1 wheel was prepared, and the service life of the user feedback can reach more than 1 year.

Embodiment 2

[0021] A thermoplastic polyimide-based cigarette machine mold box, comprising the following process steps: the mass fraction of 85% TPI, 10% PTFE+5% Al 2 o 3 After mechanical mixing, it is granulated by an extruder, and the composite granules are prepared by injection molding to prepare samples and cigarette machine mold boxes. The injection molding process conditions are as follows: the injection molding temperature is 340°C, the injection molding pressure is 100MPa, and the mold temperature is 60°C. Its mechanical properties are as follows: bending strength 145MPa, elastic modulus 5.2GPa, thermal expansion coefficient 4.3×10 -5 / ℃, friction coefficient 0.12, volume wear rate 1.8×10 -14 m 3 / (N.m); 2XAQD5 model box was prepared, and the user had no bad feedback after 10 months of trial.

Embodiment 3

[0023] A thermoplastic polyimide-based cigarette machine mold box, comprising the following process steps: TPI with a mass fraction of 65%, GF with 15%, PTFE with 5%, and SiO with 15% 2 After uniform mechanical mixing, the sample and the cigarette machine mold box were prepared by hot molding. The compression molding process is as follows: molding at 340°C, pressure 12MPa (product surface), the properties of the obtained material are as follows: bending strength 170MPa, elastic modulus 5.6GPa, thermal expansion coefficient 3.2×10 -5 / ℃, friction coefficient 0.14, volume wear rate 8.4×10 -15 m 3 / (N.m); The prepared mold box for G.Dx2 wheel has a trial life of more than 8 months.

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PUM

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Abstract

The present invention relates to mold box for resin base tobacco packaging machine and its making process, and is especially mold box of thermoplastic polyimide and its making process. The making process includes the main steps of: mixing the materials including thermoplastic polyimide in 55-95 wt%, reinforcing fiber in 0-30 wt% and solid lubricant in 5-25 wt% homogeneously; extrusion pelletizing and hot pressing. The present invention has low making cost, excellent performance and long service life.

Description

technical field [0001] The invention relates to a mold box for resin-based tobacco packaging machinery and a preparation method thereof, in particular to a thermoplastic polyimide-based mold box and a preparation method. Background technique [0002] In the 1980s, my country National Tobacco Corporation introduced technology for each major equipment in cigarette production through the "combination of technology and trade", which played a positive role in the development of my country's tobacco industry. But it also makes the development of my country's tobacco industry subject to foreign countries to a certain extent, and the equipment maintenance procedures (equipment maintenance and parts replacement) are complicated and expensive. Mold box is a key part of tobacco packaging machinery, its quality directly affects the quality and efficiency of packaging. Tobacco packaging machinery runs extremely fast. If the self-lubricating performance of the mold box is poor, it will a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/08C08K7/04B65B19/02
Inventor 黄培王晓东宋艳江
Owner NANJING TECH UNIV