90 rubber strip extruder

Model XJ-75 XJ-90 XJ-120 XJ-150 Screw Diameter (mm) 75 90 120 150 Length-to-Diameter Ratio 20:1 20:1 20:1 20:1 Motor Power (kW) 30 55 110 132 Screw Speed (r/min) 30–65 30–60 30–50 30–50 Production Capacity (kg/h) 80–180 100–300 180–540 500–750 Applications Suitable for extruding various types of rubber (EPDM, natural rubber, nitrile rubber, butyl rubber, reclaimed rubber), used in the production of composite sealing strips for building doors and windows, single-extruded sealing strips for automobiles, as well as dense and foamed rubber products in strip, rod, tube, or sheet forms for construction, electrical appliances, machinery, water conservancy, and other industries. Working Stages The process is divided into four stages: In the first stage, the machine must feed material, convey it, and compact the compounded rubber; in the second stage, the rubber compound must be heated and plasticized to become a more fluid mass; in the third stage, the extruder mixes and thermally homogenizes the compounded rubber; and in the fourth stage, pressure must be built up to force the compounded rubber through the die. For hot-feed extruders, the second and third stages are provided by a preheated open mill. Cold-Feed Equipment Operation and Maintenance 1. Before use, add 25–30 kg of oil to the hardened gear reducer (refer to the oil level indicator). Use gear oil in summer and No. 45 mechanical oil in winter. Regular oil changes can extend the service life of the reducer. 2. Periodically open the fixed cover of the cold-feed unit every 1–2 months to perform routine maintenance on the feeder, adjust the clearance between the copper knife and the feeding roller, and check the roller bearings. Failure to do so may result in rubber leakage. Lubricate the cold-feed gears with grease once per shift. 3. Prior to startup, calibrate the die diameter and tighten all flanges and fasteners. 4. Operating temperature should be maintained between 40°C and 70°C. Temperatures that are too low can damage the machine, while excessively high temperatures may cause rubber vulcanization (over‑curing), leading to equipment failure and impaired operation. 5. Before shutdown, ensure all rubber has been completely extruded from the barrel and screw, then cool the barrel and screw using circulating water until they reach room temperature. Otherwise, this may affect subsequent use. 6. Winter operating precautions: Before freezing conditions set in, add antifreeze to the circulating water to prevent ice formation and potential equipment damage.

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90 rubber strip extruder

Model number	XJ-75	XJ-90	XJ-120	XJ-150
Screw diameter mm	75	90	120	150
Length-to-diameter ratio	20:1	20:1	20:1	20:1
Motor power (kW)	30	55	110	132
Screw rotation speed r/min	30-65	30-60	30-50	30-50
Production rate kg/h	80-180	100-300	180-540	500-750

Purpose

Suitable for extruding a wide range of rubbers—including EPDM, natural rubber, nitrile rubber, butyl rubber, and reclaimed rubber—this equipment is ideal for producing composite sealing strips for architectural doors and windows, single‑extruded sealing strips, as well as various dense and foamed rubber products in strip, rod, tube, and sheet forms for applications in construction, electrical appliances, machinery, water conservancy, and other industries.

Work phase

The process is divided into four stages: In the first stage, the machine must feed, convey, and compact the compounded rubber; in the second stage, the compound must be heated and plasticized to become a more flowable mass; in the third stage, the extruder must mix and thermally homogenize the compounded rubber; and in the fourth stage, pressure must be built up to force the compounded rubber through the die. For hot-feed extruders, the second and third stages are performed by a preheated open mill.

Operation and Maintenance of Cold-Feed Equipment

1. Before use, the hardened‑tooth‑surface reducer must be filled with 25–30 kg of lubricant (refer to the oil dipstick). Use gear oil in summer and No. 45 mechanical oil in winter. Regular oil changes will help extend the service life of the reducer.

2. The fixed cover of the cold-feed system should be opened regularly, once every 1–2 months, to perform routine maintenance on the feed mechanism and adjust the clearance between the copper knife and the feed roller; otherwise, glue leakage may occur. Additionally, grease (lithium-based lubricant) should be applied to the cold-feed gears once per shift.

3. Before powering on, calibrate the bore gauge and tighten the flange and all fasteners.

4. The operating temperature range is 40°C to 70°C; temperatures that are too low can damage the machine, while excessively high temperatures may cause rubber vulcanization (scorching), resulting in equipment failure and impaired operation.

5. Before shutting down, ensure that all material has been completely extruded from the barrel and screw, and cool the barrel and screw to ambient temperature using circulating water; otherwise, this may affect subsequent use.

6. Winter-use precautions: Before freezing temperatures set in, antifreeze must be added to the circulating water to prevent ice formation and potential damage to the equipment.