Process for manufacturing PTFE sewing thread through extrusion method
A technology of PTFE and sewing thread, which is applied in stretch spinning, textile and papermaking, and filament/thread forming, etc. It can solve the problems of uneven thickness, complex structure, and inconvenient use of the drawn thread, and reduce labor. The effect of strength and manpower input, simple equipment structure and simple process
Inactive Publication Date: 2016-08-24
陈路
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Problems solved by technology
[0003] The manufacturing process of the existing PTFE sewing thread is relatively complicated, using mechanical calendering and manual stretching, which has problems such as high labor intensity, low production efficiency, and poor uniformity of product thickness, which affects the use effect, semi-mechanical production mode, and production efficiency. Low
The extrusion equipment used in the process has a complex structure and is not convenient to use, and the extruded strips are short and easy to break during extrusion; the wire drawing equipment used in the process has a complex structure and is not convenient to use, and The thickness of the drawn wire is uneven, and the wire is easy to break during the wire drawing process, which reduces production efficiency and increases production costs
The existing PTFE sewing thread manufacturing process can no longer meet the needs of production
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[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0032] A kind of extrusion method of the present invention manufactures the technique of PTFE sewing thread, it comprises the following steps:
[0033] (1) Billet extrusion
[0034] Put the rod-shaped PTFE blank in the extruder and extrude it into a strip with a diameter of 0.8-1.5 mm through the die of the extruder;
[0035] (2) Stretching and thinning of strip filaments
[0036] The strip silk obtained in step (1) is removed aviation kerosene through a deg...
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Abstract
The invention discloses a process for manufacturing a PTFE sewing thread through an extrusion method. The process comprises the following steps of 1, blank extrusion, wherein a rod-shaped PTFE blank is put in a banded extruder for extrusion and is extruded into a banded filament with the diameter of 0.8-1.5 millimeters through a die head of the banded extruder; 2, drafting and fine-drawing of the banded filament, wherein jet fuel of the banded filament manufactured in the step 1 is removed through a deoiling device on a drawbench, the banded filament is sintered through a sintering device and is drafted and fine-drawn through a drafting device, and then the PTFE sewing thread is manufactured; 3, rolling, the PTFE sewing thread manufactured in the step 2 is rolled through a rolling device of the drawbench. According to the process, the process is simple, equipment used in the manufacturing procedures is simple, use and operation are easy, product quality is easy to control, labor intensity and manpower investment are reduced, production efficiency is improved, the manufactured PTFE banded filament does not break and is long, and the uniformity, strength and percent of pass of the PTFE banded filament are guaranteed.
Description
technical field [0001] The invention relates to a process for manufacturing PTFE sewing thread by extrusion method. Background technique [0002] Polytetrafluoroethylene (Teflon or PTFE), commonly known as the "King of Plastics", is a polymer compound formed by polymerization of tetrafluoroethylene, which has excellent chemical stability, corrosion resistance, sealing, high lubrication and non-stick properties, electrical Insulation and good aging resistance. Used as engineering plastics, it can be made into PTFE tubes, rods, strips, plates, films, etc. PTFE is a thermoplastic, but it is difficult to process with ordinary thermoplastic molding methods. Its "difficulty in processing" comes from its special formability, such as PTFE's large melting dryness, shear sensitivity, and large shrinkage. Creep resistance and low coefficient of friction. [0003] The manufacturing process of the existing PTFE sewing thread is relatively complicated, using mechanical calendering and ...
Claims
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IPC IPC(8): D01D5/00D01D5/16D01D10/02
Inventor 陈路
Owner 陈路