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The problem of temperature control for the production of PVC extrusion slot

by:CSSSLD     2021-01-23
In the process of PVC extrusion production, the temperature control is important. PVC extrusion products often appear problem, usually is strongly associated with the temperature control. Let's simple to explain the principle of temperature control in the production of PVC extrusion and problems.

according to the heating period of actual office in PVC processing, with conical twin-screw extruder with PVC extrusion production can be divided into heating, temperature control and thermal insulation in three aspects. Heating and temperature control is the key in extruder, by a row of air flow, divided into two separate relativity and part of the relationship between each other, heat preservation whole process area by the core of the confluence, extrusion die and extrusion die mold parts.

here we first should clearly know that there are two kinds of PVC extrusion process of pyrogen, one is electric heating device to external heat, one kind is carried out by double screw on PVC raw material cutting, molding and friction effect, and the PVC itself points in the middle of the friction effect caused by the heat. The 2 kinds of pyrogen in extrusion of different link give full play to the different USES. Manipulation is external heat temperature control equipment. No heating in the inside of the extrusion temperature of the part of the nose, mouth mould is generally very easy to manipulate, Main parameters design of supernormal extrusion grinding tool, can cause internal heat) ; If there are internal heat, cutting effect is stronger, but not more than the requirements of the raw materials melting extrusion and melting for the exhaust pipe services, also relatively stable, and easy to manipulate. Cutting of relativity is weak, the key depends on the heating, but outside heating can not enough to the requirements of the raw materials melting feeder segment ( Outside the heating power output with lower extruder especially highlight) ; Cutting heat is across the requirements of the raw materials melting metrological verification period of manipulation are usually not affected by the temperature control equipment.

and thus in the whole process of the extrusion temperature, the feeding, the metrological verification period is the key of the temperature control and the difficult problem. Extrusion is raw material temperature control subject, rather than the screw tubes and the temperature of the grinding tool. Set the temperature is only way, and display the temperature information under different work condition of standard, and the temperature of the raw material and different matching ( Feed raw material temperature is less than information display temperature, metrological verification period of high temperature of raw information display temperature) Association, the location of the installation is the thermal resistance associated, display temperature information only about the temperature of the raw materials, just according to the set temperature and standards.

it is, to the production of PVC extrusion machinery and materials for each part of the relationship of the temperature, the temperature control of each level is critical, then we will continue to segment each link should be how to put the keys to control the temperature.
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