Plastic molds are very important for injection molding production. In order to ensure the safety of molds and workers, it is necessary to prepare response policies and prevention measures in advance. For the stiffness, strength, processability, and quality of the mold, it is generally required that the mold can produce one thousand products in a row without presenting severe quality and defect problems.

The mold should be equipped with working and storage limiters. Nitrogen cylinders should be used for single-layer storage of automated line molds, and rigid storage limiters should be used for double-layer or three-layer storage. The nitrogen cylinder mainly plays a buffering role and ensures that the internal parts of the mold are not affected by stress, avoiding mold collisions and even accidents.

In order to facilitate the replacement of damaged parts in the mold, it is necessary to set up a safety channel, preferably a square with a scale of 150 millimeters or more.

Safety measures should be taken for the moving parts of the upper mold, while protective plates and covers should be provided for the lower mold. The parts of the mold should also take into account issues such as loose screws, preventing cracking, detachment, inability to withstand impact, and oxidation.

In order to save time and facilitate the transportation of molds, connecting plates need to be set up for the upper and lower molds, and the molds should be arranged reasonably according to the characteristics of the press while ensuring the safety of the molds, making the installation and operation of the molds more convenient.

After the completion of manufacturing, injection molds still need to undergo customer inspection, which can be divided into four stages. Only when no serious problems are found during the inspection process can the mold be confirmed to be capable of being handed over.

Single debugging and line debugging inspection mainly check whether the installed mold can be smoothly installed on the processing equipment, whether the mold can be stable and produce parts that meet the standards. Together, it is necessary to carefully inspect the quality of the product and whether there are any significant defects. Also, eliminate safety and operational disadvantages in production, so that the mold can operate safely and achieve the goal of mass production. It is also possible to make corrections to areas that do not meet the scale requirements based on the conditions after the trial mold.

Connecting batch verification and batch production verification mainly ensures that under normal production conditions, the mold can be stable and produce parts continuously without any problems. The suspension and adjustment of the mold in the center should be recorded. The quality of stamped parts is required to be stable. When sampling and testing according to the production ratio, it is necessary to ensure that all parts have qualified dimensions, and that the appearance quality and minor issues present are within the allowable scale.

General drawing molds also have hardness requirements, and only need to undergo specific quality testing to confirm that there are no problems and meet the requirements before inspection.

Due to various adverse factors, injection molds can cause cracks in the drawn parts, which is a very serious appearance defect. Excessive defective products, even completely discarded, greatly waste materials and reduce production power, wasting resource losses. How should this situation be resolved?

The coloring of the pressing surface is uneven and poorly polished, the pressing ribs are damaged, the length of the mold support after installation is not the same, and there are unreasonable areas in the exhaust holes and drawn corners. It is possible to treat and repair each of the above conditions one by one.

The position of the trial punching plate and the unreasonable air cushion pressure need to be adjusted within an appropriate scale. They can be used together with the method of placing gauze or other plastic cloth on the pressing surface to modify the flow and inflow of the plate.

The size and shape of the punching board are unreasonable and do not have a certain number of process holes. It can be improved by modifying the size and adding process holes of the punching board, and printing grid lines on the trial punching board to better understand the condition of the board.

The surface in the direction of material flow is relatively rough and needs to be polished. The rounded part of the process supplement can also be enlarged. In subsequent processes, the corresponding rounded corners of the shaping and drawing molds can also be used appropriately, just paying attention to the shaping amount and stamping direction.