Plastic machinery
There are many types of plastic machinery. According to the processing technology, it is divided into three categories: extruder, injection molding machine and blow molding machine. Extruder The extruder extrudes the molten plastic through a fixed-shaped extrusion port under the action of a screw, and is cut by water-cooling after being pulled by a tractor. It is mainly used for a large number of products of the same cross-section. Extruder continuous production, such as pipe, rod, profile, etc., can also be used for plastic modification granulation. The basic mechanism of extrusion is simple – a screw rotates in the barrel and pushes the plastic forward. The screw is actually a bevel or slope that is wrapped around the center layer. Its purpose is to increase the pressure in order to overcome the large resistance. In the case of an extruder, there are three types of resistance that need to be overcome: the friction of the solid particles (feed) against the wall of the cylinder and the mutual friction between the coils before the rotation of the screw (feeding zone); Adhesion on the wall of the barrel; the internal flow resistance of the melt as it is pushed forward. Divided into single screw extruder and twin screw extruder. Injection molding machine The injection molding machine injects molten plastic into the mold. After cooling, it is a product. It is widely used. It is used differently depending on the plastic. The injection molding machine is the most used processing machine in the plastics processing industry, not only has a large number of products. The injection molding machine can be directly produced by an injection molding machine, and it is also a key device that constitutes the injection-blowing process. Injection molding machine control system features: 1. Adopt advanced computer control from famous factory; 2. Self-diagnosis fault function; 3. Directly input data such as pressure, speed, time, stroke and temperature; 4.LCD color liquid crystal display; 5. Centralized lubrication; 6. Pressure coupling oil circuit saves electricity; The 7.24 volt DC oil pressure directional valve coil will never be damaged; 8. Mold cooling water regulating device; 9.MCB insurance electric heating control; 10. Advanced computer control system, large screen display, user interface, easy to use; 11. High-precision electronic ruler stroke control with an accuracy of ±0.1mm; 12. Improve reproducibility by using pressure and oil quantity feedback; 13. Mechanical, electrical, oil pressure triple safety device, in any case to ensure the safety of the operator (PD60-PD148 optional oil pressure); 14. Improve reproducibility and operability by installing superior position sensors; 15. Use ultra-precision molding with closed-loop control. Plastic machinery, also known as plastic machinery, can be confirmed from the positioning of plastics and plastics. Plastics and plastics are a thing in the eyes of the industry. In the past, domestic factories were called plastic factories, while in Hong Kong and Taiwan, plastic factories were plastic companies. At present, some domestic-funded enterprises in China have basically hanged the brand of Plastics ** Co., Ltd. in order to facilitate communication with foreign businessmen. 1.2 The LED contains chips of two or three colors. Smd Led Lamp Beads,Lamp Beads 5050 Rgb,Rgb Smd Lamp Beads,Light Board Patch Led Dongguan XINYUDA Technology Co., Ltd. , https://www.gdxige.com
1.3 Colored or colorless, light-emitting diodes of the above colors can also be divided into four types: colored transparent, colorless transparent, colored scattering and colorless scattering. Scattered Light Emitting Diode and LED can be used as indicator light.
Colloid appearance: colorless transparency, colored transparency, colored scattering, colorless scattering, etc;
Straight LED Lamp Beads are divided according to the specifications:
2.1 Shape: round lamp, square lamp, rectangular, surface light emitting tube, side tube, surface mounting microtube, etc.
2.2 Round lamps are divided into φ 2mm. φ 4.4mm. φ 5mm. φ 8mm. φ 10mm and φ 20mm, etc.
2.3 Generally φ 3mm LED is recorded as T-1; hold φ 5mm is recorded as T-1 (3/4); hold φ 4.4mm is recorded as T-1 (1/4).
High directivity: generally, it is a pointed epoxy package, or a package with a metal reflection cavity, without scattering agent. The half-value angle is 5 ° - 20 ° or less, with high directivity, which can be used as local lighting source or combined with light detector to form an automatic detection system;