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Changshu smoothly da plastic products factory improve the low-temperature impact properties of PVC plastic profile
by：CSSSLD
2021-01-23
GB / T8814 -
In 2004 has strict rules to the low temperature impact test, such as the length of the plastic material, quality of drop hammer, hammer head radius, sample freezing conditions, test environment, etc. , in order to make the test results are accurate, we will strictly abide by the rules.
Among them: & other;
On drop hammer impact at the center of the sample & throughout;
Should be understood as & other;
The drop hammer impact at the center of the cavity of sample & throughout;
The test results are more realistic significance.
Below smooth da plastic products factory in changshu share improve the low-temperature impact properties of the PVC plastic profile two measures:
1, strict inspection materials quality, pay close attention to mold discharging mouth and vacuum port state of material, mold discharging mouth place should be the same color, have certain luster, uniform discharge, use hand to knead should have good flexibility, host vacuum port material show & other Tofu & throughout; State, when the initial plasticizing cannot shine, the host parameters such as current, head pressure should be smooth.
2, standardized process control, ensure the plasticizing effect. The temperature control should be & other; Basin & throughout; Type process, from the extruder area to the head of the heating temperature should be & other Basin & throughout; Type, barrel three or four zone temperature slightly low, make the material by & other; Throughout the cold & hot outside; Gradually become & other; The internal and external balance & throughout; To ensure the material is heated evenly. On the basis of the formula, the extrusion process do not have big changes.
when the normal production of 80 boxes, smooth appearance, low temperature impact test results for 10 sample damaged 1; Reproduction, after cleaning up mould for pressing process before extrusion, appearance is not smooth, edge have small waves, the low temperature impact test results for 10 6 sample damage. This formula is verified at constant & other; A good appearance makes a good internal & throughout; The experience.
1, strict inspection materials quality, pay close attention to mold discharging mouth and vacuum port state of material, mold discharging mouth place should be the same color, have certain luster, uniform discharge, use hand to knead should have good flexibility, host vacuum port material show & other Tofu & throughout; State, when the initial plasticizing cannot shine, the host parameters such as current, head pressure should be smooth.
2, standardized process control, ensure the plasticizing effect. The temperature control should be & other; Basin & throughout; Type process, from the extruder area to the head of the heating temperature should be & other Basin & throughout; Type, barrel three or four zone temperature slightly low, make the material by & other; Throughout the cold & hot outside; Gradually become & other; The internal and external balance & throughout; To ensure the material is heated evenly. On the basis of the formula, the extrusion process do not have big changes.
when the normal production of 80 boxes, smooth appearance, low temperature impact test results for 10 sample damaged 1; Reproduction, after cleaning up mould for pressing process before extrusion, appearance is not smooth, edge have small waves, the low temperature impact test results for 10 6 sample damage. This formula is verified at constant & other; A good appearance makes a good internal & throughout; The experience.
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