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What method can be used to repair the screw barrel of a small extruder?
What method can be used to repair the screw barrel of a small extruder?
In the operation of a small extruder, the barrel of the screw machine is worn out from time to time, and the internal hardness of the extruder barrel is higher than that of the screw rod, and its damage is later than that of the screw rod. The scrap of the extruder screw barrel is that the diameter of the cylinder is increased because of the wear and tear of the time. It is repaired as follows:
First, add the barrel diameter due to wear, if there is a nitrided layer, then we can speak out the inner hole machine barrel screw directly boring, grinding into a new size, then according to the preparation of new screw diameter.
Two, plastic extruder screw machine barrel diameter, processed by the machine, from scratch casting alloy, the thickness is generally between one millimeter to two millimeters, and then fine processing to size.
Three, usually, plastic extruder screw and barrel are wear section will be faster, the segment (5~7D) by boring dressing, matched with a nitriding alloy steel bushing, the inner hole diameter of the screw diameter in normal reference, joint clearance, processing and preparation.
Exaggerate a little here, the two main parts of screw and barrel, a screw rod is long, is a relatively small diameter and long hole, machining and heat treatment process are more complex, precision assurance difficult (n, n). So, to wear these two parts after repair is still more (g ng) for new parts, must be comprehensive analysis from the economic angle. If the cost of repair than the replacement cost of the screw lower resolution, this is not necessarily the right choice (z), compared to repair charges and expenses update, only one aspect. The extruder screw machine cylinder depends on the ratio of the repair cost to the time after which the screw is applied and the time to update the screw and to update the screw. It is an exact choice to take economies with smaller ratios.
(data comes from the Internet for reference only
In the operation of a small extruder, the barrel of the screw machine is worn out from time to time, and the internal hardness of the extruder barrel is higher than that of the screw rod, and its damage is later than that of the screw rod. The scrap of the extruder screw barrel is that the diameter of the cylinder is increased because of the wear and tear of the time. It is repaired as follows:
First, add the barrel diameter due to wear, if there is a nitrided layer, then we can speak out the inner hole machine barrel screw directly boring, grinding into a new size, then according to the preparation of new screw diameter.
Two, plastic extruder screw machine barrel diameter, processed by the machine, from scratch casting alloy, the thickness is generally between one millimeter to two millimeters, and then fine processing to size.
Three, usually, plastic extruder screw and barrel are wear section will be faster, the segment (5~7D) by boring dressing, matched with a nitriding alloy steel bushing, the inner hole diameter of the screw diameter in normal reference, joint clearance, processing and preparation.
Exaggerate a little here, the two main parts of screw and barrel, a screw rod is long, is a relatively small diameter and long hole, machining and heat treatment process are more complex, precision assurance difficult (n, n). So, to wear these two parts after repair is still more (g ng) for new parts, must be comprehensive analysis from the economic angle. If the cost of repair than the replacement cost of the screw lower resolution, this is not necessarily the right choice (z), compared to repair charges and expenses update, only one aspect. The extruder screw machine cylinder depends on the ratio of the repair cost to the time after which the screw is applied and the time to update the screw and to update the screw. It is an exact choice to take economies with smaller ratios.
(data comes from the Internet for reference only
