Methods for Repairing and Maintaining Extruder Barrel Wear, along with Relevant Precautions
Time：
2017-03-04
Http://www.shuangdasuji.com The wear of the barrel in a plastic extruder primarily manifests as an increase in the inner diameter of the barrel over time due to continuous use. Because the barrel’s surface hardness is higher than that of the screw, barrel damage typically occurs later than screw wear. When repairing or restoring the barrel, the following points should be carefully observed: (www.shuangdajx.cn) 1. If the barrel’s diameter has increased due to wear and still retains a certain nitrided layer, the internal bore can be directly bored and ground to achieve the desired new diameter, after which a new screw can be manufactured to match this updated dimension. 2. Through machining…
http://www.shuangdasuji.com The wear of a plastic extruder’s barrel primarily manifests as an increase in the barrel’s inner diameter over time due to continuous use. Because the barrel’s surface hardness is higher than that of the screw, the barrel typically sustains damage later than the screw. When repairing or refurbishing the barrel, it is important to pay attention to the following:
The following matters are as follows: (www.shuangdajx.cn)
1. If the barrel’s diameter has increased due to wear and still retains a certain nitrided layer, the inner bore can be directly bored and lapped to achieve the desired new diameter, after which a new screw can be machined to match the revised dimensions.
2. Through machining, the inner diameter of the barrel is reconditioned and re‑cast with an alloy, with the wall thickness maintained within 1–2 mm, followed by precision finishing to the new dimensions.
3. Under normal operating conditions, the homogenization section of the barrel wears more rapidly than other areas. This section can be re-bored and reground, then fitted with a nitrided alloy‑steel liner. The inner diameter of the liner should be matched to the screw diameter, leaving an appropriate clearance for proper fit, and subsequently machined to specification.
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