Precautions for mold processing and maintenance

With the continuous development of various industries, the mold industry is not willing to fall behind, so what are the injection molding standards of the mold industry, and how to maintain the mold? Next, we will introduce in detail

1、 What are the design standards of injection molding laminated mold?

1. Different from the conventional mold, the cavity of the laminated injection mold is distributed on two or more layers, which is equivalent to the overlapping arrangement. The most common two-layer mold is usually composed of two single-layer molds installed back-to-back, and the parting surface is usually opened synchronously by the gear and rack mechanism

2. Generally, when the injection molding machine is used with conventional mold, its injection volume and opening stroke only use 20% ~ 40% of the rated value, which does not give full play to the performance of the injection molding machine. Compared with the conventional mold, the production efficiency of the two-layer stacked mold is nearly 100% higher than that of the standard mold, and the mold locking pressure is only about 10% higher than that of the standard mold, The injection cost is reduced

3. The laminated injection mold is most suitable for large flat parts, shallow cavity shell parts, small multi cavity thin wall parts and parts requiring mass production

Double layer die

For example, the first layer of mold can produce one kind of product, while the second layer of mold can produce another product. These products can be a combination of the same or different materials, the same or different colors. For example, the first layer of injection container cover and the second layer mold can be used to inject the main body of the container

2、 How to maintain the mold?

1. First of all, the processing enterprise should provide a resume card for each die, recording and counting its use, care (lubrication, cleaning, rust prevention) and damage in detail, so as to find out which parts and components have been damaged and the degree of wear, so as to provide information for finding and solving problems, as well as the molding process parameters and product materials of the mold, so as to shorten the trial run time of the mold, Improve production efficiency

2. The processing enterprise should test the performance of the injection molding machine and mold under normal operation, and measure the size of the final molded plastic part. Through this information, the existing state of the mold can be determined, and the damage of the cavity, core, cooling system and parting surface can be found. According to the information provided by the plastic parts, the damage status of the mold and the maintenance measures can be judged

3. It is necessary to focus on tracking and testing several important parts of the mold: the function of ejecting and guiding parts is to ensure the opening and closing movement of the mold and the ejection of the plastic part. If any part of the mold is jammed due to damage, it will lead to production stop. Therefore, it is necessary to maintain the lubrication of the ejector pin and guide pillar (the most suitable lubricant should be selected), and regularly check whether the ejector pin and guide pillar have deformation and surface damage, Once found, it should be replaced in time; After completing a production cycle, professional antirust oil should be applied to the working surface, moving and guiding parts of the die, especially to the protection of the elastic strength of the bearing parts of the mould with gear and rack and the spring mould, so as to ensure that they are always in the best working state;

With the continuous production time, the cooling channel is easy to deposit scale, rust, sludge and algae, which makes the cross-section of the cooling channel smaller and the cooling channel narrow, which greatly reduces the heat exchange rate between the coolant and the mold, and increases the production cost of the enterprise. Therefore, attention should be paid to the cleaning of the flow channel. For the hot runner mold, the maintenance of the heating and control system is conducive to preventing the occurrence of production failure, Therefore, it is particularly important Therefore, after the end of each production cycle, ohmmeter should be used to measure the belt heater, rod heater, heating probe and thermocouple on the mold. If there is any damage, it should be replaced in time, and compared with the mold resume to make records, so as to timely find problems and take countermeasures

4. Attention should be paid to the surface maintenance of the mold, which directly affects the surface quality of the product, and the key point is to prevent corrosion. Therefore, it is particularly important to select a suitable, high-quality and professional antirust oil, Copper bar, copper wire and professional mold cleaning agent can be used to remove residual injection molding and other deposits in the mold, and then air dry It is forbidden to clean iron wire, steel bar and other hard objects to avoid scratching the surface. If there are rust spots caused by corrosive injection molding, use grinding machine to grind and polish, spray professional antirust oil, and then store the mold in a dry, cool and dust-free place A well maintained mold can shorten the mold assembly and test run time, reduce production failures, make the production run smoothly, ensure product quality, reduce waste loss, and reduce the enterprise's operating costs and fixed assets investment. At the beginning of the next production cycle, the enterprise can smoothly produce qualified products, In the current fierce market competition, good mold maintenance can help enterprises To sum up, if you still have doubts about the knowledge of mold, welcome to consult us, we will have professional personnel to answer your doubts