Draw mold diagram
Before drawing the mold assembly drawing, the process drawing should be drawn, and it should meet the requirements of the part drawing and process data. The size guaranteed by the next process should be marked with the words “process size” on the drawing. If after forming, apart from repairing the burr, no other machining is performed, then the process drawing is exactly the same as the part drawing.
It is better to mark the part number, name, material, material shrinkage rate, drawing ratio, etc. under the process drawing. Usually the process drawing is on the mold assembly drawing.
1. Draw the assembly structure diagram
As far as possible when drawing the assembly drawing, use a ratio of 1:1, first start drawing from the cavity, and draw the main view and other views at the same time.
(1) The mold assembly drawing should include the following:
1) Mold forming part structure
2) The structure of the gating system and the exhaust system.
3) Parting surface and way of parting and taking parts.
4) Shape structure and all connecting parts, positioning and guiding parts.
5) Mark the height dimension of the cavity (not mandatory, as required) and the overall dimensions of the mold. 6) Auxiliary tools (tools for picking and unloading molds, correction tools, etc.).
7) Code all the part numbers in order and fill in the detailed list.
8) Mark technical requirements and instructions for use.
(2) The technical requirements of the mold assembly drawing:
1) Performance requirements for certain systems of molds. For example, the assembly requirements for ejector system and slider core pulling structure.
2) Requirements for mold assembly process. For example, after the mold is assembled, the bonding gap of the bonding surface of the parting surface should not be greater than the parallelism requirements of the upper and lower sides of the mold of 0.05mm, and indicate the size determined by the assembly and the requirements for this size.
3) Mold use, assembly and disassembly methods.
4) Anti-oxidation treatment, mold number, lettering, marking, oil seal, storage and other requirements.
5) Requirements related to mold trial and inspection.
2. Draw all parts diagram
The order of disassembling and drawing the parts drawing from the mold assembly drawing should be: first inside and then outside, first complicated and then simple, forming parts first, then structural parts.
1) Graphic requirements: must be drawn in proportion to allow zoom in or zoom out. The view selection is reasonable, the projection is correct, and the layout is appropriate. In order to make the processing patent number easy to understand and easy to assemble, the graphics should be as consistent as possible with the assembly drawing, and the graphics should be clear.
2) The dimensioning requirements are unified, centralized, orderly and complete. The order of dimensioning is: first mark the main part dimensions and the draft angle, then mark the matching dimensions, and then mark all the dimensions. Mark the mating dimensions on the non-main parts drawing first, and then mark all the dimensions. 3) Surface roughness. Mark the most used roughness on the upper right corner of the drawing, such as “Remaining 3.2.” Other roughness symbols are marked on each surface of the part.
4) Other content, such as part name, mold drawing number, material designation, heat treatment and hardness requirements, surface treatment, graphic ratio, free size processing accuracy, technical description, etc. must be filled in correctly.
Post time: Nov-12-2021