Advantages of A-type sprue bushing in high temperature resistance
Publish Time: 2025-02-28
In modern plastic molding processing, mold design and accessories selection have a vital impact on the quality of finished products and production efficiency. As one of the key accessories in plastic molds, A-type sprue bushing plays the role of connecting the gate and the mold core to ensure that the plastic material can smoothly enter the mold cavity. The high temperature resistance of A-type sprue bushing is crucial for the smooth progress of the plastic processing process.
1. Selection of high temperature resistant materials
The high temperature resistance of A-type sprue bushing is directly related to the thermal stability of the selected material. High-quality A-type sprue bushings are usually made of high temperature resistant alloy steel, copper alloy or special high temperature resistant plastics. These materials have a high melting point and thermal expansion coefficient, which enables them to maintain sufficient strength and stability in high temperature environments.
Alloy steel material: Many high-end A-type sprue bushings use alloy steel materials with excellent thermal stability, such as H13 mold steel, which can withstand high working temperatures and can usually withstand high temperatures of 350°C to 500°C without deformation or damage.
Copper alloy material: Copper alloy A-type sprue bushings have good thermal conductivity and can quickly dissipate heat at high temperatures to prevent local high temperatures from affecting the performance of the mold. The high temperature resistance of copper alloys makes them commonly used in high-temperature plastic processing in injection molding. These high-temperature resistant materials enable A-type sprue bushings to remain stable for a long time in high-temperature working environments, and are not easy to wear or corrode, thereby increasing the service life of the mold.
2. Thermal conductivity improves mold working efficiency
In the plastic injection molding process, mold temperature control is crucial. As part of the mold temperature conduction, A-type sprue bushings are required to have excellent thermal conductivity to ensure that heat can be quickly and evenly transferred to all parts of the mold to avoid defects caused by local overheating. High temperature resistant materials such as copper alloys and special alloy steels have good thermal conductivity, which enables A-type sprue bushing to conduct heat quickly and avoid product quality problems caused by excessive temperature differences.
In addition, good thermal conductivity helps shorten the injection molding cycle and improve production efficiency. In a high temperature environment, A-type sprue bushing can help quickly cool and solidify plastics, improve mold turnover, and reduce energy consumption.
3. Improve mold stability and wear resistance
Under high temperature conditions, the thermal stability of the mold and its accessories is an important factor in ensuring the long-term operation of the mold. The high temperature resistant material of A-type sprue bushing can maintain good strength and hardness in a high temperature environment, avoiding softening, deformation or wear of the material caused by high temperature, thereby ensuring the long-term stability of the mold.
The high temperature resistant A-type sprue bushing also has strong wear resistance. Even in the high temperature and high pressure injection molding process, the parts of the A-type sprue bushing that contact the plastic can resist wear and extend the service life of the mold. This advantage is particularly suitable for processing plastic materials with high viscosity and high melting point, such as nylon and polycarbonate (PC).
4. Corrosion resistance and oxidation resistance
Under high temperature environment, some plastic materials (such as PVC, polyurethane, etc.) may release corrosive gases, which will accelerate the wear and corrosion of mold accessories. High temperature resistant A-type sprue bushing materials usually have strong corrosion resistance, which can effectively resist the erosion of plastic gas or chemicals and maintain the long-term stability of mold accessories.
In addition, the oxidation resistance of high temperature resistant materials enables A-type sprue bushing to remain stable in high temperature oxidation environment, avoid surface oxidation or discoloration, and ensure the performance of mold accessories throughout the production cycle.
5. Ensure the accuracy of injection molding process
During the injection molding process, temperature control is an important factor affecting product quality. The advantage of A-type sprue bushing in high temperature resistance can effectively control the temperature of the mold, thereby avoiding molding defects caused by uneven temperature difference. Especially when processing thermoplastic materials, stable high temperature performance can ensure the consistency of material fluidity and avoid problems such as uneven material distribution or bubbles caused by temperature fluctuations, thereby ensuring the accuracy of injection molding and the quality of products.
6. Improve production efficiency and cost-effectiveness
The high temperature resistance of A-type sprue bushing directly affects production efficiency and cost. During the injection molding process, high temperature and stable A-type sprue bushing can accelerate the molding process of plastics and reduce cooling time, thereby improving production efficiency. At the same time, since high temperature resistant materials can extend the service life of A-type sprue bushing, the cost of frequent replacement of mold accessories is reduced, and the maintenance cost in production is reduced.
The high temperature resistance of A-type sprue bushing, a plastic mold accessory, is an important advantage in efficient and stable production. By selecting high temperature resistant materials (such as high alloy steel, copper alloy, etc.), A-type sprue bushing can maintain stable performance in high temperature working environment, provide excellent heat conduction performance, wear resistance, corrosion resistance and oxidation resistance, these characteristics can not only increase the service life of the mold, but also improve the efficiency of the injection molding process and the quality of the product.
