Equipment Components: Single-screw extruder ------ Die ------ Cooling and shaping water tank ------ Belt traction machine ------ Cutting machine
Extrusion Section: For the production of profiles with small cross-sectional dimensions, such as thermal insulation strips, a single-screw extruder or co-extrusion is generally chosen for molding to avoid wasting production resources and energy. The selection of a single-screw extruder depends on two main factors: the size of the product cross-section and the required output. The larger the extrusion output, the larger the screw diameter; the larger the cross-sectional area (larger cross-sectional size) of the profile, the larger the screw diameter.
Extrusion Die: The extrusion die is the main component for product molding. Its function is to continuously and uniformly transform the cylindrical melt provided by the extruder into a well-plasticized mold with a cross-section and geometric dimensions similar to the channel. After cooling and other processes, a high-performance profile product is obtained.
Cooling and Shaping Section: The cooling and shaping platform is equipped with a water tank and a water circulation system. The water tank is made of stainless steel, and cooling is achieved through circulating water spraying. The shaping platform is equipped with a forward and backward movement device and left/right and height adjustment devices.
Traction Section: The traction machine is used to continuously and automatically pull the cooled and hardened sealing strip from the machine head. It is a frequency converter with variable speed control.
Cutting and Collection Section: After being controlled by a limit switch according to the required length, the machine automatically cuts and pushes down after a delay, enabling continuous production. The cutting machine uses a fixed-length switch signal as an instruction to complete the entire cutting process. During the cutting process, it remains synchronized with the profile movement. The cutting process is driven by electric and pneumatic power. The cutting machine is equipped with a dust collection device to promptly remove the debris generated during cutting.
1. Feeding System: Stable control of PP filling delivery
2. Temperature Control System: Precise low-temperature control to prevent PP degradation
3. Molding Mold: Optimized flow channel to control thermal insulation strip shrinkage
4. Shaping and Cooling System: Rapid shaping to suppress thermal insulation strip warping
5. Traction and Cutting System: Precise control of length and cross-sectional accuracy
Plastic welding rods are filler materials used for plastic welding. They are long strip products (commonly in the form of round bars, flat bars, and triangular bars) made from specific types of plastics (such as PP, PE, PVC, ABS, etc.) through an extrusion process. Their core function is to melt and bond with the plastic parts (base material) being welded after heating (such as with a hot air gun or plastic welding gun) to form a strong connection. Its features and advantages closely revolve around "material compatibility, welding reliability, and ease of use," specifically as follows:
The core characteristic of plastic welding electrodes stems from their "homogeneous" material design with the base material and their optimized physical properties for welding processes, distinguishing them from other plastic connection methods such as glue and bolts:
The core design principle of plastic welding electrodes is "electrode material = welded plastic material," ensuring "molecular-level fusion" with the base material during welding and avoiding bonding failure due to material differences:
Common materials and applicable scenarios are clearly defined, with no cross-compatibility issues:
PP (Polypropylene) welding electrodes: Suitable for PP material products (such as plastic water tanks, PP pipes, car bumpers), acid and alkali resistant, high temperature resistant (can withstand hot water around 100℃);
PE (Polyethylene) welding electrodes: Suitable for PE material products (such as outdoor trash cans, PE storage tanks, agricultural pipes), low temperature resistant (not brittle at -40℃), impact resistant;
PVC (Polyvinyl Chloride) welding electrodes: Available in rigid versions (suitable for PVC) Pipes, sheets, and flexible materials (suitable for PVC waterproof membranes and plastic films) are resistant to chemical corrosion and suitable for chemical applications.
ABS (Acrylonitrile-Butadiene-Styrene) welding electrodes are suitable for ABS products (such as appliance housings, toys, and automotive interior parts), offering high surface gloss and easy coloring after welding.
