Common problems and solutions in the use of PVC film vacuum suction plastic water

Today, ZHONGSHAN LINYANG PLASTIC CO.LTD will come to you to explain the common problems and solutions in the use of PVC film vacuum suction plastic water: Phenomenon: groove foaming and large area foaming analysis: 1. The temperature or pressure does not meet the requirements, 2. The amount of glue is not enough, the amount of spraying is small or the sheet is glued; 3. The preheating (softening the PVC film) or the plastic time (molding time) is not enough; 4. After the plastic forming, the temperature has not dropped case, remove the pressure. 5. The heat resistance of the glue itself is not enough. Solution: 1. Increase the temperature or vacuum degree; 2. Increase the amount of glue and choose a good quality plate; 3. Increase the preheating or forming time; 4. After the plastic forming, the temperature is cooled to room temperature or slightly higher before removing out of the vacuum. 5. Use with curing agent. Analysis of the causes of local foaming: 1. The glue is not sprayed uniformly, resulting in a small amount of local glue, which reduces the bonding strength; 2. The problem of PVC film, PVC film contains plasticizers, in the case of aging or heat, increase The plasticizer is easy to migrate to the surface, which affects the bonding strength; 3. There is a problem with the heating tube in the blister machine, resulting in uneven temperature. Solutions: 1. Try to make the amount of glue sprayed evenly; 2. Use good quality PVC film; 3. Repair the equipment in time. Phenomenon: Analysis of the reasons for not being able to absorb the edge or shrinking the edge: 1. During blistering, the side temperature is too low or the vacuum degree is not enough; 2. The temperature resistance of the glue is not enough; 3. After the blister molding, the temperature has not dropped yet case, remove the pressure. Solution: 1. Increase the temperature or vacuum degree; 2. Use with curing agent; 3. After plastic forming, the temperature is cooled to room temperature or slightly higher, and then the vacuum is withdrawn. Phenomenon: Analysis of the causes of pitting on the surface of the blistered product: 1. The particle size of the glue is large, and the use of thin PVC film is prone to pitting, which is characterized by uniform dispersion; 2. When used with a curing agent , the curing agent is not completely dispersed; 3. The surface of the sheet is not cleaned, or after the glue is sprayed, the workshop is dusty and sticks up, the pitting is very unevenly dispersed, and the size is different; 4. The viscosity of the glue is too large, Uneven dispersion; 5. The viscosity of the glue is too small or the solid content is low, causing the board to fluff. Such pits generally appear in the corners of the grooves and appear in blocks. 6. The air pressure of the spray gun is not enough, and the atomization is not good. 7. The glue is not filtered (in this case: a bucket of glue is used to the end, if it falls into the booty or there is conjunctiva, it should be filtered with a filter). Solution: 1. Choose glue with small particle size; 2. When preparing curing agent, prolong the stirring time so that the curing agent can be completely dispersed; 3. Clean the surface of the board before spraying glue, and separate the glue spraying workshop; 4. Choose glue with suitable viscosity or high solid content; 5. After the glue is dry, it can be polished with fine sandpaper; 6. Increase the vacuum degree to adjust the atomization effect; 7. When using, filter it with a filter. Phenomenon: local orange peel Cause analysis: 1. Too much glue is sprayed locally; 2. There is oil on the surface of the sheet, which causes the glue to shrink; 3. The curing agent is not completely dispersed, resulting in shrinkage. Solution: 1. Spray the glue evenly in an appropriate amount; 2. Keep the surface of the board clean; 3. Fully stir the curing agent to make it evenly dispersed. Zhongshan ZHONGSHAN LINYANG PLASTIC CO.LTD Decorative Materials Co., Ltd. was established in 2003. It is a modern enterprise specializing in the production, sales and service of PVC plastic molds for cabinets. The company covers an area of u200bu200b20,000 square meters and has an existing asset of 200 million yuan. It is the largest PVC sales company in the Central Plains region. At the same time, small batch delivery and 24-hour fastest delivery service are provided.

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