Français
1. Forming temperature.
When the recipe is fixed, the temperature is the basis of the vulcanization. If the temperature is higher than 180 degrees, the vulcanization speed is very fast and the production is high, but it is easy to produce dirty mold, shiny, deformation of the product, small size, thin system thickness. However, it is easy to produce dirty mold, shiny, deformation of product, small size, excessive thickness of thin system, brittle hair edge, etc.
2. Vulcanization time:
The length of vulcanization time directly affects the quality of products. If the vulcanization time is short, the product will be impervious to maturation, colorful, easy to be white and not durable; if the time is too long, the product will The relationship between temperature and time must be made according to the thickness of the product and the type of rubber, and thick products must be vulcanized at low temperature for a long time. If the time is not enough, the product will be stuck on the mold, and it will be difficult to remove it by digging and washing the mold, the mold should be closed again. Basically, the material can be glued down. One of the biggest problems of molding is that the employees adjust the machine privately to cause scrap.
3.Machine pressure:
It is the set pressure of molding vulcanizing machine, which is controlled by pressure gauge and computer. Enough pressure can make the rubber pressed into the mold completely when the mold is closed, and eliminate the bubbles caused by the trace moisture of the rubber when vulcanizing, and control the product bubbles with the exhaust. The size of the pressure excitation is related to the shape size of the mold, the mold is small, the pressure excitation should be reduced accordingly to prevent the mold and the flat plate of the vulcanizer from deformation. When adjusting the pressure of the vulcanizer, the maximum pressure should not exceed the maximum pressure of the vulcanizer, otherwise the machine will be damaged and so on. Empty mold without pressure (except injection mold) is an effective measure to protect the mold cutter and prolong mold life.
4. Rubber shape and molding vulcanization method:
It refers to the shape of the rubber preform, which can be long, small square, or in a circle. The thickness, length and width of the rubber must be close to the product. The closer the shape of the rubber is to the product, the shorter the flow time of the rubber in the mold, the shorter the flow distance, the thinner the edge, the less the amount of rubber used, and the higher the qualified rate of the product;
5. Adhesive weight and structure size:
The weight of the glue must be greater than the weight of the product, otherwise there will be a lack of glue. But the more glue you put in, the thicker the edge of the product will be, and the size will be bigger. The weight of the glue is directly related to the shape of the glue. How to use the least amount of glue and the most reasonable shape to produce without glue shortage is a reflection of the level of skill of the molding staff. If the weight of the material is enough, but the length is longer than the mold, there will be a shortage of glue, and if the shape and weight of the material are suitable, but it is placed on the wrong side, there will be a thin side and a thick side, and in serious cases, there will be a lack of glue on one side and a thick side. The shape of the rubber is suitable, the total weight of the star is suitable, but the thickness and width of the cut is not uniform, or the fill Uneven gluing will also cause the lack of glue. When there is a lack of glue in the product, do not rush to add more glue, first of all, you should take the complete mold containing the edge, check the weight, and then see if the thickness of the product is even. Then we should see if the thickness of the product is even, and finally decide whether to add more material. The technical content and experience of the molding foreman is very important!
6. Operation speed:
It refers to the operating speed when vulcanizing the rubber and taking the product. Rubber vulcanization is a chemical reaction, the rubber will start to vulcanize from the time it is put on the hot mold, one mold with many holes. For products with multiple cavities in one mold, from the first piece of rubber to the last piece of rubber, the shorter the time to set up the rubber, the better, set up the rubber to close the mold immediately, otherwise, it is easy to have dirty mold, hot rubber, edge Otherwise, it will be easy to have dirty mold, hot glue, thick edge, deformation and other abnormalities. When you take the product, the pneumatic assistance can easily blow out the product, but it will lower the temperature of the mold. If you are not skilled in operation, it is most likely that the mold The temperature is getting lower and lower, resulting in uncooked products and sticky molds, and novices are most likely to have this problem. In the production of glossy glue board, the speed of setting, closing and starting the mold has the most obvious effect on the quality of the glossy surface.
The most obvious impact on the quality of the glossy surface, why some products with strict appearance requirements choose to hang on the mold operation, one of the main principles is also here!
When the recipe is fixed, the temperature is the basis of the vulcanization. If the temperature is higher than 180 degrees, the vulcanization speed is very fast and the production is high, but it is easy to produce dirty mold, shiny, deformation of the product, small size, thin system thickness. However, it is easy to produce dirty mold, shiny, deformation of product, small size, excessive thickness of thin system, brittle hair edge, etc.
2. Vulcanization time:
The length of vulcanization time directly affects the quality of products. If the vulcanization time is short, the product will be impervious to maturation, colorful, easy to be white and not durable; if the time is too long, the product will The relationship between temperature and time must be made according to the thickness of the product and the type of rubber, and thick products must be vulcanized at low temperature for a long time. If the time is not enough, the product will be stuck on the mold, and it will be difficult to remove it by digging and washing the mold, the mold should be closed again. Basically, the material can be glued down. One of the biggest problems of molding is that the employees adjust the machine privately to cause scrap.
3.Machine pressure:
It is the set pressure of molding vulcanizing machine, which is controlled by pressure gauge and computer. Enough pressure can make the rubber pressed into the mold completely when the mold is closed, and eliminate the bubbles caused by the trace moisture of the rubber when vulcanizing, and control the product bubbles with the exhaust. The size of the pressure excitation is related to the shape size of the mold, the mold is small, the pressure excitation should be reduced accordingly to prevent the mold and the flat plate of the vulcanizer from deformation. When adjusting the pressure of the vulcanizer, the maximum pressure should not exceed the maximum pressure of the vulcanizer, otherwise the machine will be damaged and so on. Empty mold without pressure (except injection mold) is an effective measure to protect the mold cutter and prolong mold life.
4. Rubber shape and molding vulcanization method:
It refers to the shape of the rubber preform, which can be long, small square, or in a circle. The thickness, length and width of the rubber must be close to the product. The closer the shape of the rubber is to the product, the shorter the flow time of the rubber in the mold, the shorter the flow distance, the thinner the edge, the less the amount of rubber used, and the higher the qualified rate of the product;
5. Adhesive weight and structure size:
The weight of the glue must be greater than the weight of the product, otherwise there will be a lack of glue. But the more glue you put in, the thicker the edge of the product will be, and the size will be bigger. The weight of the glue is directly related to the shape of the glue. How to use the least amount of glue and the most reasonable shape to produce without glue shortage is a reflection of the level of skill of the molding staff. If the weight of the material is enough, but the length is longer than the mold, there will be a shortage of glue, and if the shape and weight of the material are suitable, but it is placed on the wrong side, there will be a thin side and a thick side, and in serious cases, there will be a lack of glue on one side and a thick side. The shape of the rubber is suitable, the total weight of the star is suitable, but the thickness and width of the cut is not uniform, or the fill Uneven gluing will also cause the lack of glue. When there is a lack of glue in the product, do not rush to add more glue, first of all, you should take the complete mold containing the edge, check the weight, and then see if the thickness of the product is even. Then we should see if the thickness of the product is even, and finally decide whether to add more material. The technical content and experience of the molding foreman is very important!
6. Operation speed:
It refers to the operating speed when vulcanizing the rubber and taking the product. Rubber vulcanization is a chemical reaction, the rubber will start to vulcanize from the time it is put on the hot mold, one mold with many holes. For products with multiple cavities in one mold, from the first piece of rubber to the last piece of rubber, the shorter the time to set up the rubber, the better, set up the rubber to close the mold immediately, otherwise, it is easy to have dirty mold, hot rubber, edge Otherwise, it will be easy to have dirty mold, hot glue, thick edge, deformation and other abnormalities. When you take the product, the pneumatic assistance can easily blow out the product, but it will lower the temperature of the mold. If you are not skilled in operation, it is most likely that the mold The temperature is getting lower and lower, resulting in uncooked products and sticky molds, and novices are most likely to have this problem. In the production of glossy glue board, the speed of setting, closing and starting the mold has the most obvious effect on the quality of the glossy surface.
The most obvious impact on the quality of the glossy surface, why some products with strict appearance requirements choose to hang on the mold operation, one of the main principles is also here!
