Plastic Mold Manufacturing Process

"Fast": It requires the preparation of the shortest time-consuming process documents in the shortest time. The following four points should be paid attention to in the work:

1. Technologists should be able to be familiar with the machine tool equipment and technical level of the unit. It is best to operate each machine tool and have a good understanding of processing to meet the requirements of complexity and particularity of mold parts. They can quickly determine the best processing flow and improve the speed by getting a drawing.

2. Determine the reasonable minimum machining allowance. Between the upper and lower processes and the coarse and fine processes, the necessary machining allowance is set aside to reduce the processing time of each process.

3. As the mold parts are mostly single pieces, small batches and process cards, they cannot be as careful and detailed as batch products, but they should strive to understand at a glance without omission. The key processes should be clearly explained and the processing precautions should be clearly written, and the operation guidance should be written to reduce the adaptation time of operators and reduce processing errors.

4. The fixtures, measuring tools and auxiliary tools needed in the processing process should be designed in advance and prepared in advance.

"Good": It requires craftsmen to be able to write the most reasonable and best process documents to prevent and deal with problems in the processing process. It is also one of the standards to measure whether a craftsman is excellent. Mainly should pay attention to the following points:

1, reasonable arrangement of heat treatment process. One of the characteristics of mold products is the mechanical properties of the material, heat treatment requirements are very strict, convex and concave mold, fixed plate and other key parts, in the initial stage to arrange annealing, improve processing performance, after quenching, aging, eliminate stress deformation.

2, strictly distinguish between coarse and fine process. Generally, the division of rough and fine processes is determined by the heat treatment process, and the processing after the final heat treatment is mostly finishing. The margin should be arranged as far as possible in the rough machining stage to reduce the loss of the tool and the electrode and electrode wire of the electric machining.

3, to use pretreatment process measures. For-some parts such as concave dies and convex die fixing plates with more materials removed in the middle, a unilateral allowance of about 0.5mm should be adopted before finishing. The roughly shaped cavity should be machined first, then quenched and aged, and then finished to eliminate the stress and deformation in the machining. For some thin-walled parts, such as the discharge sleeve, a reinforced process table should be pre-processed to prevent the deformation of the machining clamp.

4, appropriately set aside processing benchmark. In production, it is often encountered that the processing benchmark cannot coincide with the design benchmark. At this time, it is necessary to pre-process a process benchmark to facilitate processing in each process. For high-precision products such as progressive dies, dimensional accuracy conversion is required.

5, also need to use professional terminology. In the process documents, the well-known professional terms and processing expression methods should be fully used to clearly convey the processing intention. Fuzzy language such as color and "processing to drawings" and "shape and dimension tolerances to requirements" should be avoided. The process and drawings should be organically combined to make the parties understand what should be done,

How to do this, it is also convenient for inspectors to "save": it is to fully save manpower, material resources, financial resources, and improve unit production efficiency. Mainly should pay attention to the following points:

1. From the viewpoint of mechanical processing technology and overall planning, the principle of centralized process processing should be adopted for single pieces and small batches of products such as molds, and the processing should be arranged on one machine tool as far as possible to shorten the process flow. This can reduce the repeated labor time of clamping, drawing reading, calculation, etc., reduce the time of sequence transfer and inspection, and improve the production efficiency.

2. Fully estimate the working hour quota for each machine tool, and try not to use slow ones as fast as possible and solve them by rough machining,