Common problems and solutions in the use of vacuum plastic water

Phenomenon: blistering in the grooves and large-area blistering analysis: 1. The temperature or pressure does not meet the requirements, resulting in false suction; 2. The amount of glue is not enough, the amount of spraying is small, or the plate seeps glue; 3. Preheating (softening the PVC film) Or the blister time (molding time) is not enough; 4. After the blister molding, the pressure is withdrawn before the temperature has dropped. 5.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 applied and choose a board with good quality; 3. Increase the preheating or molding 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 spraying is not uniform, resulting in a small amount of local glue, which reduces the bonding strength; 2. The problem of PVC film, PVC film contains plasticizers, which increase in aging or heating conditions. 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. Solution: 1. Try to make the amount of glue sprayed evenly; 2. Use good quality PVC film; 3. Overhaul the equipment in time. Phenomenon: Analysis of the reasons for not being able to absorb or shrinking: 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 In this 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 After plastic forming, the temperature is cooled to room temperature or slightly higher, and then the vacuum is withdrawn.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: There are pockmarks on the surface of the blistered product. Analysis of the reasons: 1. The particle size of the glue is large, and the use of thin PVC film is easy to produce pockmarks. The characteristics of such pockmarks are uniform dispersion; 2. When used with a curing agent , the curing agent is not completely dispersed; 3. The surface of the board is not cleaned, or after the glue is sprayed, there is a lot of dust in the workshop, and the pockmarks are very unevenly dispersed and vary in size; 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 adding 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 glue with 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 screen. Phenomenon: orange peel occurs locally Reason analysis: 1. Too much glue is sprayed locally; 2. There is oil on the surface of the plate, 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 Decoration 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. A good brand that you can trust!

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