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-section
High Strength and Deformation Resistance (Structural Support Requirements)
Excellent Impact Resistance: Maintains good toughness even at temperatures as low as -40℃ or as high as 80℃. It will not crack at low temperatures (unlike inferior plastic strips such as PVC) and will not soften or sag at high temperatures, making it suitable for various climates (from frigid to subtropical).
Strong Weather Resistance and Chemical Stability (Outdoor Use Requirements)
UV Aging Resistance: High-quality products contain antioxidants and UV absorbers. After a 1000-hour xenon lamp aging test, the surface shows no obvious yellowing or cracking, and the tensile strength retention rate is ≥85%. This ensures stable performance throughout the lifespan of doors and windows (typically 20-30 years), preventing insulation failure and poor sealing due to aging.
Acid and Alkali Resistance and Corrosion Resistance: Resistant to outdoor rainwater, acidic substances in smog (such as sulfur dioxide), and cleaning agents (such as neutral detergents for door and window cleaning). It will not rust like metal strips, nor will it soften or corrode like PVC strips.
Precise Dimensional Stability (Sealing and Fit Requirements)
High-Precision Molding: Utilizing extrusion molding technology, the cross-sectional dimensional error can be controlled within ±0.05mm (as with common C-type and I-type thermal insulation strips). This ensures precise matching with aluminum profile grooves, guaranteeing no loosening after installation and improving the overall sealing performance of doors and windows.
Environmental Protection and Safety (Green Building Requirements)
No Harmful Substance Release, Recyclable: After disposal, it can be crushed and regranulated (glass fiber separation is required), reducing plastic waste pollution and aligning with the "circular economy" concept, unlike some non-recyclable composite insulation materials.
