PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Process Analysis of PTFE Rod Quality Problems
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2022-11-16
Visits:
Teflon rods include Teflon molded rods, Teflon plunger extruded rods and Teflon paste extruded rods. This article is mainly on the PTFE plunger extrusion rod prone to quality problems
Process analysis was performed.
1. teflon rod diameter instability:
1. The speed of extrusion screw is not stable.
2. The heating temperature of the barrel is not stable.
3. The filter screen at the porous plate is blocked.
4. The traction speed is not stable.
Figure 1: PTFE rod Source: Dankai
2. ptfe rod roundness irregular:
1. The temperature of the molding die is unstable.
2. The melt temperature of extrusion molding is unstable.
3, the screw wear is serious, the extrusion melt pressure is not stable.
4. The traction machine is not running smoothly.
Figure 2: PTFE rod Source: Dankai
3. PTFE rod appearance rough, dull:
1. The heating temperature of the barrel is low, and the raw material plasticization is uneven.
2. The temperature of the molding die is low.
3, raw material impurities.
4. The mold is uneven and the finish is poor.
4. PTFE rod has bubbles or silver wire on the surface:
1. High moisture content of raw materials.
2. The temperature of the heating barrel is too high.
5. extrusion material breakage:
1. The inlet of supply hopper is blocked.
2. The temperature of the barrel feeding section is too high.
3. There are many impurities on the filter screen, blocking the filter screen.
6. extruded PTFE rod bending:
1. The temperature difference of each section of die or sizing sleeve is too large.
2. The cooling of the product is uneven.
The auxiliary machine and the central line of the extruder are not in a straight line.
4, the product is not completely cooled.
PTFE rod has a wide range of applications, mainly used for some mechanical matching, precision processing parts, etc., including sealing, insulation, wear resistance, corrosion resistance and so on.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
Analysis, PTFE, extrusion, temperature, heating, molding, mold
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