The relationship between raw materials and processing time in injection molding

According to statistics, raw material costs account for 70% to 85% of the cost of large plastic components in mold injection plants, 50% to 65% of the cost of medium-sized plastic components, and about 30% of the cost of small plastic components. The cost of raw materials is the main part of injection production costs, and the injection production process should strengthen the control of nozzle materials, waste, rubber heads, and raw materials. The links that cause raw material loss in injection production in mold injection factories include: mixed materials, incorrect powders, ultra short materials, water ball team mixing, incorrect filling materials, incorrect added materials, baked material blocks, completely cleaned baked material barrels, raw material contamination, high defect rate, adjustment time, unclassified rubber heads (flat recycling)

According to the statistical analysis of the injection cost of the mold injection molding plant, the average loss of raw material conversion in mold production is 2 kilograms, with an average price of 20 yuan/kilogram per kilogram of raw material. The losses per kilogram of rotation, color change, beer replenishment, raw material replacement, repair machine/repair, experimental mold, conversion machine, etc. are relatively small, and the materials (mixing, powder mixing, and powder mixing) are also small

The above content does not include the loss of raw materials caused by other aspects of the mold injection plant, such as incorrect materials, returns, water addition, incorrect materials added, ultra short supplementary materials, raw material contamination, etc.

Therefore, all employees in the injection workshop of the mold injection plant should raise their awareness of raw material conservation, strengthen raw material management and control, improve the work quality and sense of responsibility of each employee, reduce raw material waste in various stages of injection production, and create more profits for the enterprise. The shorter the injection cycle time in the mold injection factory, the better, while ensuring product quality. The shorter the injection cycle and the more production quantity, the lower the manufacturing cost per unit product. The injection cycle time includes injection time, holding time, cooling time (melting time), opening time, ejection time (including residence time), opening time, material retrieval time, closing time, clamping time, etc. (in special cases, it also includes injection table forward/backward time and injection demolding time).

The main methods to shorten the injection molding cycle time in mold injection molding factories include: reducing plastic wall thickness/channel size (reducing cooling time), reducing the distance between opening and closing molds/top rod travel, quickly removing products, robot operation, improving the opening/closing speed of safety doors, reducing plastic adhesion, selecting the correct cooling time, and setting the opening/clamping speed.

Assuming the standard injection cycle of a machine in a mold injection factory is 24 seconds, if the actual injection cycle is extended to 30 seconds, a lot of money can be compensated in one month. The more machines in a mold injection factory, the more compensation they will receive.