In the last article, we talked about the part1 part of the mold design to the trial mold process, and then we will continue to explain it to you.
2. Proofreading, reviewing, tracing, and sending photos
(1) The relationship between the mold and its parts and the drawing of the plastic part
Whether the material, hardness, dimensional accuracy, structure, etc. of the mold and mold parts meet the requirements of the plastic parts drawings.
(2) Plastic parts
Whether the flow, shrinkage, welding marks, cracks, demoulding angle of the plastic material flow affect the performance, dimensional accuracy, surface quality and other requirements of the plastic parts. Whether the pattern design is insufficient, whether the processing is simple, and whether the shrinkage rate of the molding material is selected correctly.
(3) Forming equipment
Insufficient injection volume, injection pressure, and clamping force, whether there is any problem with the installation of the mold, the south core of the plastic part, and the demolding, and whether the nozzle of the injection machine and the nozzle sleeve are properly contacted.
(4) Mould structure
1) Whether the position of the parting surface and the precision of the finishing process meet the requirements, whether there will be flashing, and whether the plastic parts can be guaranteed to stay on the side of the mold with the ejector device after the mold is opened.
2) Whether the demolding method is correct, whether the size, position and quantity of the promotion rod and push tube are appropriate, whether the push plate will be jammed by the core, and will it cause scratches on the molded parts.
3) Regulating mold temperature. The power and quantity of the heater; whether the location, size, and quantity of the flow line of the cooling medium are appropriate.
4) The method of processing the undercut of plastic parts, and whether the mechanism for removing the undercut is appropriate, such as whether the slider and the push rod in the inclined guide column core pulling mechanism interfere with each other.
5) Whether the position and size of the pouring and exhaust system are appropriate.
(5) Design drawings
1) Whether the placement of the mold parts on the assembly drawing is appropriate, whether it is clearly expressed, and whether there are omissions
2) The part number, name, production quantity, in-house or outsourcing of the part on the part drawing, standard or non-standard part, matching processing accuracy of the part, correction processing and margin at the high-precision dimension of the molded plastic part, Whether the material, heat treatment, surface treatment, and surface finishing degree of the mold parts are marked and clearly described.
3) The working dimensions and matching dimensions of the main parts and the molded parts. The size figures should be correct and do not cause the manufacturer to convert.
4) Check the view positions of all parts drawings and assembly drawings, whether the projection is correct, whether the drawing method meets the drawing national standard, and whether there is any missing size.
Post time: Nov-13-2021