1, raw material inspection and identification of warehouse manager in charge of supply and procurement of raw and auxiliary materials by material test, laboratory technicians were detected in a timely manner, comparing the experimental data of the indicators and requirements, given the material test results. The warehouse keeper identifies the raw material and auxiliary material according to the test result, identifies, protects and isolates the nonconforming material, and prevents the unqualified material from entering the production line.
2, material, material and resin material mixing chamber (1) to receive from the warehouse staff responsible for correct and quality specifications and quantity of raw materials to the production line. In the process of material ingredients, to make the right move, to prevent the collapse of yarn, leaky bucket etc.. (2) the mixing chamber scaleman according to workshop temperature, carefully test formula, and record; strict measurement work, ensure that the amount of additives, fully mixing of resin (usually 3 hours); stir well after re sampling test (change the formula), to see whether the results are consistent with the formula, such as is not the same, should be timely to find the reasons and notify the person in charge of production. The formula, preparation and test of resin material, use the same batch of curing agent and accelerator.
3. Preparation before production (1) equipment debugging. First, carefully check the equipment operation and work site is normal, special resin curing agent should carefully check whether the pump is double clothing clogging, resin and curing agent ratio is needed to meet the requirements; to ensure the lining, wound dressing, stripping and other equipment, stable operation and working accuracy. Note the nose, jaw clutch teeth and the gear line. (2) material preparation. Place all the required materials in a designated place and confirm the material that has been tested. (3) cleaning dies. First of all, repair the mold socket, cutting groove, the mold surface without pit, dust, debris and other attachments, not smooth when you must wax, so that the surface of the mold smooth and smooth. Test the die head, especially the socket end is eccentric, the eccentricity should be controlled within 3MM. (4) inspection of sprinkler head. Clean the spray holes in time so that the resin can be sprinkled smoothly. (5) wrapping polyester film. Uniformly coated with a polyester film on the surface of the mold, it is required that the film be free of breakage, wrinkle free, smooth and clean on both sides, and the mouth must be flat to prevent the formation of circumferential strip wrinkles.
4, lining process (1) according to the design requirements of surface layer and the lining layer made of overlapping width, the edge is damaged and broken in a timely manner to fill, resin and curing agent are mixed evenly, finished knitted mat after combined roller rolling repeatedly from bubble to ensure fiber impregnated. Pay attention to observe the spray hole, confirm whether the curing agent flows out, mix evenly, prevent local curing bad. (2) to resin coat, resin curing agent with low or high curing agent must be scraped off; the local poor resin to fill the resin, to prevent the emergence of leukoplakia. (3) the resin flux of the first and second layers of the felt layer is more than 97% of the designed resin content, so that the surface felt layer is completely saturated, and the total amount of the resin inside the liner is not changed. (4) short cut felt and felt are rolled to the end of the socket at both ends of the mold and rolled with an iron press roller. (5) to force uniform mesh, non elastic edge socket and decapitation overlap with multi foot resin, and start to hand even at the broken ends. Non operation method of increasing tension tensile fiberglass mesh, using scissors cut. (6) preliminary self check. The lining shall be free of poor adhesive, dirt, sundries, felt, white spots and so on. Measure lining thickness to determine whether or not to exceed or exceed design thickness. Take timely measures to rework defects.
5, the depth of far infrared curing curing station power began to open, far infrared curing depth of the liner in the curing process should be based on appropriate speed (core initial speed 3.5rpm, the speed for the pipeline after the gel, 2.5rpm) mold to maintain the uniform rotation, curing, and keep proper distance the pipeline (more than 500MM).
6, the process quality inspection, winding again carefully check the appearance of the lining and curing degree (after the gel does not stick hand start winding) whether qualified, unqualified is strictly prohibited winding.
7, winding (1) according to the design table requirements input parameters, pay attention to the socket stop angle, add and subtract speed section length, cut points, the number of cross and winding length to be accurate. (2) fabrication of inner structural layer. The inner structure layer is wrapped with multi point winding, and the zero position is adjusted to ensure the position of the pipe feather and the length of the pipe. The starting bell hoop is not allowed to have dry gauze soaked in acetone or winding yarn and resin mixed uneven wound on the tube wall, must ensure the yarn soaked completely, cannot have the mesh, yarn, yarn, yarn slip knot, uneven phenomenon, compact and uniform requirements of yarn cloth over the entire the surface of the tube. In the process of winding, the speed is stable, and the bus is not willing to stop or change speed to avoid slipping. When walking to the car around the liner spigot end, according to the design requirements in the yarn wrapped between the glass surface mat, car mobile time break, cannot for two or more than two layers of glass mat, carpet surface is completely covered in the winding yarn, then the surface felt. (3) sand layer production. The sand layer is made of fixed ratio double service and pressure molding sand filling technology. According to the design of resin content requirements, select quartz sand, resin ratio. Before adding sand, check whether the spraying machine's resin curing agent and double service pump is normal, whether the spray hole of the gun head is smooth, whether the curing agent flows out or not, and the mixture is even