Equipment Components: Single-screw extruder ------ Die ------ Cooling and shaping water tank ------ Belt traction machine ------ Winding 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 strips out from the machine head. It is a frequency converter.
Rewinding Machine Section: Its core function is to achieve non-stop roll changing through "alternating operation of dual reels," while precisely controlling the winding tension and wire arrangement accuracy to ensure that the roll material is neat and undamaged.
The characteristics of plastic fireproof expansion strip equipment are "targeted design based on the special raw materials, performance and compliance requirements of fireproof expansion strips", and the advantage is that these designs directly solve the industry's pain points of "difficulty in meeting standards, low efficiency, high cost and high risk" - it can not only ensure that the products meet fire protection standards, but also achieve efficient, compliant and flexible production, which is the core support for the large-scale and high-quality production of plastic fireproof expansion strips.
High-Temperature Expansion Flame Retardant:
Core fire-resistant performance, rapid expansion, and immediate sealing: When the fire temperature reaches 150-250℃, the internal expanding flame retardant rapidly decomposes to produce gases (such as CO₂ and NH₃), propelling the plastic substrate to expand. The expansion ratio can reach 5-30 times the original volume (depending on the formulation, high-expansion products can seal larger gaps). The resulting charred layer structure is dense and high-strength, tightly filling gaps, blocking the path of flame propagation, and simultaneously preventing the diffusion of high-temperature gases and toxic fumes (such as carbon monoxide and hydrogen chloride produced by plastic combustion).
Stability and adaptability at room temperature:
Balancing installation and usage needs, good flexibility and easy molding: The base material is mostly elastic plastic (such as EPDM, silicone rubber), which has good flexibility and ductility at room temperature. It can be bent and cut to fit irregular gaps (such as door and window corners, curved curtain wall gaps). No on-site pouring or mixing is required; it can be installed directly by pasting, embedding, etc., with a high degree of fit (unlike rigid fireproof bricks and fireproof boards, which cannot fit irregular gaps).
Weather resistance and chemical stability:
Adaptable to diverse environments, anti-aging and corrosion resistant: High-quality products contain antioxidants and UV absorbers, which can resist sun exposure, rain, and ozone aging when used outdoors (e.g., the anti-aging life of EPDM base material can reach 15-20 years), and will not yellow or become brittle due to long-term exposure; at the same time, it can withstand common building chemicals (such as cement slurry, cleaning agents, weak acids and alkalis), and will not be corroded or degraded, making it suitable for various indoor and outdoor scenarios (such as exterior curtain walls, underground garage pipe gaps).
Environmentally friendly and low-toxicity:
Meets safety standards, no volatilization at room temperature: No odor or release of harmful substances (such as formaldehyde and heavy metals) at room temperature, and will not affect indoor air quality after installation, meeting the standards for green building (LEED) and indoor environmental protection for civil buildings.
