Plastic mold is a kind of combination mold used for compression molding, extrusion molding, injection molding, blow molding and low foaming molding. A series of plastic parts with different shapes and sizes can be processed with the coordinated changes of the convex, concave and auxiliary molding systems. In order to meet the needs of molded parts, we need to pay attention to some matters when selecting plastic molds, and put forward corresponding requirements. The following six requirements should be met when selecting more appropriate plastic molds.
- High corrosion resistance Many resins and additives have corrosion effects on the surface of the mold cavity. This corrosion causes the metal on the surface of the mold cavity to dissolve, peel off, deteriorate the surface condition, and deteriorate the quality of the plastic parts. Therefore, it is better to use corrosion-resistant steel, or chrome plating, cymbal nickel treatment on the cavity surface.
- Good abrasion resistance The glossiness and precision of the surface of plastic plastic parts are directly related to the abrasion resistance of the surface of the plastic mold cavity. Especially when glass fiber, inorganic filler and some pigments are added to some plastics, they flow together with the plastic melt at high speed in the flow channel and cavity, causing great friction on the cavity surface. If the materials are not abrasion resistant, they will soon wear, causing damage to the quality of the plastic parts.
- Good dimensional stability When plastic molding, the temperature of the plastic mold cavity should be above 300 ℃. For this purpose, it is better to select tool steel (heat treated steel) with proper tempering treatment. Otherwise, the material microstructure will be changed, resulting in changes in the size of the plastic mold.
- The die parts that are easy to process are mostly made of metal materials, and some structural shapes are very complex. In order to shorten the production cycle and improve efficiency, the die materials are required to be easy to process into the shape and precision required by the drawings.
- Plastic plastic parts with good polishing performance usually require good luster and surface state, so the roughness of the cavity surface is required to be very small. In this way, the cavity surface must be processed, such as polishing, grinding, etc. Therefore, the selected steel should not contain rough impurities and pores.
- In order to improve the hardness and wear resistance, the plastic mold is generally subject to heat treatment, but this treatment should make its size change very small. Therefore, it is better to use pre hardened steel that can be machined.
Choosing the right plastic mold is essential for producing high-quality plastic products. With so many options available in the market, it can be overwhelming to select the right one for your specific needs. In this article, we will discuss six important factors that are needed to purchase the right plastic mold.
- Type of Plastic: The first factor to consider is the type of plastic you will be using for your production. Different types of plastic have different properties, such as melting point, shrinkage, and flow rate. The mold must be designed and manufactured to handle the specific type of plastic to achieve the desired quality and consistency in the final product.
- Production Volume: The second factor to consider is the production volume. If you need to produce a high volume of products, you will need a mold that can withstand high levels of wear and tear. A high-quality mold can last longer and produce more consistent results, saving you money in the long run.
- Lead Time: The third factor to consider is the lead time for the mold. The lead time is the time it takes to design and manufacture the mold. If you have a tight deadline, you may need to select a mold manufacturer that can produce the mold quickly without compromising on quality.
- Cost: The fourth factor to consider is the cost of the mold. The cost of the mold will depend on several factors, such as the complexity of the design, the type of plastic used, and the production volume. It is important to balance cost with quality to ensure that you get the best value for your money.
- Quality: The fifth factor to consider is the quality of the mold. The quality of the mold can have a significant impact on the quality of the final product. A high-quality mold will produce consistent results, minimize defects, and last longer, reducing the need for frequent repairs or replacements.
- Customer Support: The sixth factor to consider is customer support. A reputable mold manufacturer should provide excellent customer support and be available to answer any questions or concerns you may have throughout the process.
In conclusion, selecting the right plastic mold requires careful consideration of several factors, including the type of plastic, production volume, lead time, cost, quality, and customer support. By taking these factors into account, you can choose a mold that will produce high-quality products efficiently and cost-effectively.