Plastic mold processing drawing planning and analysis
a. Plastic mold processing drawings, all parts drawings,
1. graphic requirements: it must be drawn to scale and allowed to expand or reduce. The view selection is reasonable, the projection is correct, and the installation is stable. In order to make the processing patent number easy to understand and convenient for the equipment, the graphics should be common with the general assembly drawing as much as possible, and the graphics should be clear.
2. indicate that the standard requirements are common, convergent, orderly and perfect. The order of marking standards is: first mark the primary part standards and die inclination, then mark the collaborative standards, and then mark all standards. On the non primary part drawing, collaborative standards shall be marked first, and then all standards shall be marked.
3. surface roughness. Mark the applied roughness on the upper right corner of the drawing, such as “other 3.2”. Other roughness symbols are separately marked on each surface of the part.
4. other contents, such as part title, mold drawing number, data trademark, heat treatment and hardness requirements, surface treatment, graphic proportion, machining accuracy of free standard, technical clarification, etc., shall be filled in correctly.
b. Plastic mold processing drawings. Proofreading, drawing review, drawing tracing, and submitting to the sun
The contents of self proofreading are:
1. page standards of plastic mold processing drawings and their parts and plastic parts drawings
Whether the raw materials, hardness, standard accuracy and layout of mold and mold parts meet the requirements of plastic part drawings.
2. plastic parts
Whether the activity, shrinkage cavity, weld line, crack and demoulding slope of injection flow of injection molded products affect the application function, standard accuracy, surface quality and other requirements of plastic parts. Whether there is a lack of drawing planning, whether the processing is simple, and whether the shortening rate of molding data is selected correctly.
3. molding equipment
Whether the injection volume, injection pressure and clamping force are enough, whether there is any doubt about the equipment of the mold, the South core and demoulding of the plastic parts, and whether the nozzle of the injection machine is in correct contact with the mouth sleeve.
4. layout of plastic mold processing drawings
1) Whether the parting surface orientation and finish machining accuracy meet the needs, whether the overflow will occur, and whether the plastic parts can be ensured to remain on the side of the mold with ejection equipment after mold opening.
2) Whether the demoulding method is correct, whether the size, orientation and quantity of the extension rod and push tube are appropriate, whether the push plate will be stuck by the core, and whether the scratch formed parts will be formed.
3) Mold temperature conditioning. Power and quantity of heater; Whether the direction, size and quantity of the moving route of the cooling medium are appropriate.
4) How to deal with the side concave of plastic parts? Is the arrangement of the side concave appropriate? For example, is the slider and push rod in the inclined guide pillar core pulling arrangement disturbing each other.
5) Whether the orientation and size of the pouring and exhaust system are appropriate.