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Extruder What Are The Operational Requirements For Formal Operation?

The extruder can be divided into continuous extrusion and discontinuous extrusion according to the type of action. According to the direction of the head flow and the angle of the screw center line, the machine head is divided into bevel head (angle 120 °) and right angle head The The head of the nose is fixed with bolts on the fuselage, the mold inside the die has a core sitting, and fixed with a nut in the nose into the line port, the core seat in front of a core, core and core The center has holes for passing through the core. Plastic extruder is also a kind of plastic machinery.

Plastic extruders are also one of the types of plastic machinery. Extruder according to the direction of the head material and the angle of the screw center line, the machine can be divided into right angle head and bevel nose and so on. The head of the shell is usually bolted to the fixed on the fuselage, the head of the mold inside the mold core seat, and then use the nut to be fixed in the nose of the nose port, the core seat is also equipped with And the center of the mandrel and the mandrel has holes which act on the core. Depending on the type of pressurization, the extrusion process can be divided into two types: continuous extrusion and intermittent extrusion. The former equipment used for the screw extruder, the latter equipment for the plunger extruder. In this screw extruder can be roughly by virtue of the number of screws for the single screw extruder and multi-screw extruder.

The working mechanism of the screw extruder depends on the pressure and shear force produced by the rotation of the screw, which allows the material to be fully plasticized and evenly mixed and molded by die; sometimes it can be done at the same time using an extruder Mixing, plasticizing and molding a series of processes, so as to continuous production. In addition, the working mechanism of the plunger extruder is mainly by the use of plunger pressure, the first plastic material in advance from the die extrusion to achieve the effect of forming. The material in the material cylinder after the extrusion out of the plunger will return to wait until the addition of a new round of plastic materials and then the next round of operation, this production process is discontinuous production, and the basic material can not be fully stirred As well as the mixing, in addition to the production of pre-plasticization, so the actual production is usually not often used in this method, can only be applied to the poor mobility or viscosity is very large plastic, like nitrocellulose plastic this Plastic products of the molding process.

Plastic screw extruder work, the fuselage, head and screw and material to produce a strong friction between the pieces easy to wear, if the operation is not easy to make the machine prematurely damaged, so when using the extruder must Note the operation requirements of the extruder.

1) Before the official run ready to drive the following should do the following aspects of the work.

2) carefully check the equipment, water, point system is in a normal, safe and reliable state.

3) the nose, body and screw preheated to the process requirements of the temperature, while opening the bottom of the hopper cooling jacket, access to cold water.

4) Before driving the machine to be constant temperature for some time. Due to the temperature of the extruder temperature control instrument in advance of the actual temperature of the material, if not constant temperature for a certain period of time, it will cause the instrument temperature has reached the required temperature, twenty material temperature is low. At this time if the material, because the actual temperature is low, so that the material melt viscosity is too high and axial overload, will lead to damage to equipment and even cause personal injury accident.

5) When the parts reach the specified temperature, tighten the connection bolts on the nose part of the nose to check the connection status so as to ensure that no leakage occurs during operation.

6) check the hopper and the remaining material, no foreign matter exists, especially metal and other hard debris, so as not to damage the screw or barrel.

7) should be put on the clean before the filter, check the head is consistent with product variety, size requirements, the nose parts are clean.

8) The parts to be lubricated should have sufficient oil.

9) clean operation site, keep the host and auxiliary equipment and console clean, raw materials, products, tools placed in orderly.

10) Check the running equipment, check the operation is normal.

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