Raw materials lead to bad, black spots in the production process due to black spots in the raw materials which accounted for 20% of the total non-performing rate, so the need to carefully read the compound before the product to see if there is black dot impurity phenomenon. Followed by the second back to the material caused by excessive black spots, the general mixing compound long-term storage of vulcanizing agent failure after the need to add new curing agent vulcanizing agent, so in the second refining process from the hands and vulcanizing agent and the air which appears compound Pollution phenomenon led to the formation of vulcanized products have black spots of impurities, so the black spots for the control of raw materials need to pay attention to the requirements of the two sides of the operator Lianjiao, contact with the rubber tools, cutting the tool and the indoor environment of the environment clean!
Molding operations lead to: in the production process which the exhaust line of the machine is too likely to appear when the exhaust spots inhaled black spots impurities, so the environment around the machine and the indoor environment needs strict control, the mold has too much debris Also do not pay attention to the new on-line mold above the phenomenon of debris more, so the general silicone products manufacturers will first mold blasting or spray Teflon in the mold to keep mold clean can solve the key black spots in the The process of pound material need to pay attention to the hands clean, the work surface and all around the black spots may cause impurities in all the items clean up, human phenomenon is an important factor in the appearance of bad phenomenon, so because when their own finishing and rectification to develop good Operating habits, to prevent the appearance of black spots bad phenomenon!
