| Daily maintenance standards for crochet machine |
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| Daily maintenance standards for crochet machine Applicable models: 750 ribbon lace crochet machine, 980 fancy yarn crochet machine Classify maintenance according to pre shift, in shift, post shift, weekly, monthly, and quarterly levels, while distinguishing key precautions for mechanical/computer models. 1、 Pre shift maintenance (10 minutes before startup) Cleaning inspection Clean the yarn frame, yarn guide eye, tensioner, crochet machine, and settling plate area of flying flowers, yarn shavings, and oil stains; A pile of flying flowers can easily cause needle jumping and yarn breakage. Check for any deformation, breakage, or burrs on the crochet hook, sinker, and presser foot; Replace the needle immediately if it is crooked or damaged. Lubrication inspection Check the oil level in the centralized lubricating oil tank, and replenish the special lubricating oil for the crochet machine in a timely manner if the oil level is below the scale line (it is forbidden to mix gear oil and waste engine oil). Confirm that the automatic lubrication pipeline is unobstructed and the oil dripping is normal; The non automatic lubrication model manually drips oil onto the cam, slider, and crochet arm. Transmission and electrical inspection The tightness of the belt is moderate and there is no cracking; Check the tightness of the chain. Test drive the spindle, and the machine has no abnormal noise or jamming; Check whether the servo drive and electronic crossbar wiring of the computer model are loose. Auxiliary device Is the action of the yarn breakage self stop sensor, rubber root yarn feeder, and winding tension device sensitive. 2、 In class inspection (every 2 hours during the production process) Pay attention to abnormal noise, vibration, and abnormal heating: the temperature of the cam box and swing arm mechanism should not be too high. Observe the fuel supply status and prevent dry grinding; Do not spray oil excessively to avoid oil contamination of yarn and webbing. Replace the worn-out grooves on the guiding porcelain eyes in a timely manner to prevent continuous breakage of the yarn. Do not operate at overload and overspeed for a long time; Stop the machine for inspection in case of needle skipping or sparse gear, and prohibit production with defects. Key point: Oil stains falling onto finished woven tapes/feather yarns are considered significant quality defects. 3、 Post shift maintenance (after shutdown) Whole machine cleaning with flying flowers Use a brush and vacuum cleaner to clean the needle bed, cam area, traction roller, and yarn separation reed flying flowers; Prohibit high-pressure air guns from blowing directly into bearings and servo motors at close range. Clean the traction roller and rubber pressure roller Remove adhesive yarn fluff and oil stains; Rubber rollers should avoid contact with solvents to prevent aging and swelling. Lubrication Closing Drive at low speed for a few turns to evenly distribute the oil on the sports pair; It is recommended to apply a thin layer of anti rust oil to crochet hooks and metal moving parts during long-term shutdown. Environment and Power Supply Turn off the main gas source and power supply; The remaining yarn on the yarn rack should be neatly arranged to prevent disorderly entanglement. 4、 Weekly maintenance Thoroughly clean the outside of the cam box, swing arm slider, and weft yarn lateral guide rail of accumulated dust and oil sludge. Check all fasteners: needle bed screws, swing arm pins, yarn frame base, and tension mechanism bolts to prevent looseness and gear deviation. Clean the filter screen of the lubricating oil filter to prevent oil blockage and wear caused by oil shortage. Computer model: Clean the electronic horizontal screw and apply a thin layer of screw specific lubricating grease; Check the limit switch. Correct the gap between the crochet hook and the sinker; Gap deviation is the core cause of needle skipping. 5、 Monthly maintenance Check the wear level of the chain and synchronous belt, and readjust the tightness. Check for oil leakage in the spindle oil seal and cam box; Replace the oil seal in a timely manner to avoid contaminating the product due to oil leakage. The tensioner and yarn feeding roller bearings should be checked for any abnormal noise by listening to the sound. If there is a lack of oil and grease, the bearings should be replaced directly if they get stuck. Clean the heat dissipation filter of the electrical control box to prevent poor heat dissipation from causing alarms in the frequency converter and servo. Check the effectiveness of the safety functions of the automatic stop and emergency stop switches for yarn breakage. 6、 Quarterly maintenance (3 months) Centralized lubrication system: Drain oil stains from the bottom of the oil tank and replace with new lubricating oil as needed. Disassemble and inspect the wear of the cam and the clearance between the swing arm bushings. If the clearance is too large, replace the bushings in a timely manner. Comprehensive calibration of the whole machine synchronization: crochet loop forming time, settling plate matching timing (must be calibrated after maintenance and long-term high-speed operation). Add lubricating grease to the motor bearings; Check if the grounding wire is secure. 7、 Key maintenance points for key components Crochet hooks and sinkers Do not collide or bump; Long term shutdown does not require drying and rust prevention; Replace immediately if burrs, bends, or cracks appear. Guide porcelain eye Replace immediately if there is a groove, don't settle for it; Ceramic eye damage will continue to cause yarn breakage. Cam mechanism (core vulnerable part of crochet machine) Strictly prohibit dry grinding due to lack of oil; Stop the machine immediately if there is any abnormal noise; After the cam is corroded, it cannot be repaired and needs to be replaced directly. Electronic horizontal screw (computer 750 crochet machine) Prevent flying flowers from entering the screw rod; Do not collide; Regularly clean and lubricate with lubricating grease, and strictly prohibit oil shortage. Pulling rubber roller Avoid direct contact with engine oil; Surface slippage can be wiped with specialized cleaning agents, do not use banana oil or thinner. 8、 Maintenance taboos (easy to step on) Prohibit the indiscriminate mixing of different types of lubricating oil; High pressure air guns are not allowed to blow forcefully into the gaps between servo motors, encoders, and bearings; During machine operation, it is prohibited to wipe the needle bed or reach into the movement area; Do not overfill, as oil splashing onto the fabric can cause oil stains and defective products; Long term accumulation of flying flowers without cleaning can absorb heat, block oil circuits, and accelerate component wear. |
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