Rubber filter press process
Time：
2018-10-10
For thin-walled products or those with stringent quality requirements, it is necessary to remove impurities from the rubber compound to prevent adverse effects on airtightness and tear resistance. During the filtration process, talc should not be added to the compound to avoid scorching when the temperature rises excessively. Prior to filtration, the compound should undergo hot mixing on an open mill to enhance its thermoplasticity. The hot‑mixing and feeding procedures are identical to those used in standard extruders. Temperature settings for the filter press are as follows: barrel 40–50°C, die head 60–90°C, and filter plate 60–80°C. After filtration, the temperature of NR compound should not exceed 130°C; for compounds containing 30% SBR, the temperature should remain below 140°C. The filtered compound may then be processed on an open mill…
For thin-walled parts or products with stringent quality requirements, it is necessary to remove impurities from the rubber compound to prevent adverse effects on the product’s air tightness and tear resistance. During the filtration process, talc should not be added to the compound to avoid scorching when the compound temperature becomes excessively high.
Before filtration, the rubber compound should be hot‑mixed on an open mill to enhance its thermoplasticity. The hot‑mixing and feeding procedures are the same as those used for conventional extruders. The temperatures of the various sections of the filter machine are as follows: the barrel 40–50°C, the die head 60–90°C, and the filter plate 60–80°C. After filtration, the temperature of the NR compound does not exceed 130°C; even when 30% BR is incorporated, the temperature remains below 140°C.
The filtered rubber compound can be sheeted on an open mill to cool down, and talc and accelerators can be added according to process requirements.
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Shuangda
Hebei Shuangda Rubber Machinery Co., Ltd.
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