What are the design principles of chemical plastic barrel moulds

The functions of plastic containers are twofold. Plastic containers are endowed with the desired shape, quality, cooling and pushing out plastic parts. Dies determine the performance, shape, size and accuracy of the final plastic parts. Therefore, the design of advanced and reasonable injection mould structure is the key to achieve quality requirements, product quality stability and economic benefits. In order to design plastic mould well, we should grasp the following principles:
1. The selection of parting surface is reasonable. In order to get the condensate of the product and the pouring system out of the mould, the parting surface of the mould must be set. Parting surface is an important factor to determine the structure of the die. The setting of parting surface determines the structure and manufacturing process of the die, and affects the flow of melt and the demoulding of the plastic parts. The general selection principle of parting surface is to ensure the quality of plastic parts, simplify the structure of the die and facilitate demoulding.
2. Proper selection of drawing slope. In order to make it easy for the forming part to come out of the cavity, the drawing slope is necessary. The gradient depends on the shape of the product, the type of plastic, the structure of the die, the surface accuracy and the direction of processing. In general situations, the appropriate slope is about 30'~1 30'. There is no precise formula for calculating the slope of die drawing. In most cases, according to the empirical value, the larger demoulding slope is taken without obstructing production.