What preparations need to be done before injection mold debugging?


Drawing check The injection mold debugging must be prep […]

Drawing check
The injection mold debugging must be prepared according to the mold debugging notice issued by the external cooperation department or the production department. The first step is to review the drawings. There are two drawings here, one is the product drawing for mold debugging, and the other is the mold drawing. According to the product drawing, understand the material, geometric size, function and appearance requirements of the product, such as color, spots, impurities, joint marks, dents, etc. According to the mold drawing, you can know the equipment used for mold debugging, whether the technical parameters are consistent with the mold requirements, and whether the tools and accessories are complete. After reviewing the drawings, pass them to the next process.

Equipment inspection
Check the oil circuit, water circuit, circuit, and mechanical movement parts of the equipment used, and maintain the equipment as required; check the technical parameters of the equipment: the diameter of the positioning ring, the size of the nozzle sphere R, the nozzle aperture, the minimum mold thickness, the maximum mold thickness, and the The mold stroke, tie rod spacing, ejection method, etc. must be full

Meet the requirements of the trial model and make preparations before driving.
The tryout equipment should be the same as the machine in the future production. This is because the technical parameters of the equipment are related to the technical standards of the trial products. Temperature fluctuations, pressure changes, idle cycle time, and mechanical and hydraulic drive stability will affect the quality of the product. Using equipment with large clamping force to try out the mold, and switching to an injection machine with small clamping force, the molding conditions may need to be changed.

Material preparation
Check whether the specifications, models, brands, additives, color masterbatches, etc. of the processed plastic raw materials meet the requirements, and dry the raw materials with high humidity to determine the ratio.

In principle, the raw materials should be the raw materials specified in the drawings, because the mold is designed according to the physical and mechanical properties of the raw materials. It can also use raw materials with good fluidity, easy fast curing, and good thermal stability. The structure of the test mold can truly reflect the distribution of product parts, fillets, wall thickness, and stiffeners, which can be used as a reference for modifying the injection mold.

Mold inspection
Before the injection mold is installed on the injection machine, the mold should be checked according to the mold drawing, so that the problem can be found in time and the mold can be repaired. According to the injection mold assembly drawing, you can check the shape of the mold, the size of the positioning ring, the size of the main runner inlet, the size of the sphere R that matches the nozzle, the inlet and outlet of the cooling water, and the height and width of the pressure plate. The gating system and cavity of the mold need to be opened for inspection. When the movable mold and the fixed mold of the mold are separated, the direction marks should be paid attention to to avoid mistakes when closing.

Cooling water pipe or heating line
Connect the mold cooling water pipe or heating circuit to check. If the parting surface adopts hydraulic pressure or motor, it should also be connected to check separately.

Tools and accessories
The tryout tool is a special tool for the tryout personnel. It is contained in a portable toolbox and is easy to carry. Each debugger should be equipped with one set. The tools related to mold trial are mechanical handles, spacers, thermometers for checking mold temperature, measuring cards for checking mold dimensions, tools for checking products, etc., as well as copper rods, copper sheets and sandpaper commonly used in operation. spare parts.

The inspection of the inserts is very important. The various inserts of the trial mold include metal inserts, plastic inserts, rubber inserts, paper product inserts, and stereotypes to ensure that the product is not deformed after molding, etc., must be strictly Check to avoid damaging the mold and causing irreparable losses.