Pvc-u tube size specifications:
Hard pvc-u pipe has a nominal outer diameter of 50CM, but the soft PVC pipe is generally 50mm;
Hard pvc-u tube specifications: GB/T13020-1991;
Soft pvc-u tube specifications: GB/T13527.1-1992;
The hard pvc-u tube has a nominal outer diameter of: (unit: mm) 2.5, 3, 4, 5, 6, ..... 355, 400, 450, 500, 560, 630, 710, 800, 900, 1000, etc. References: Mechanical Design Handbook, 2nd Edition, Volume 1, 3-526, 530;
Injection molding process conditions:
Drying treatment: Drying is usually not required.
Melting temperature: 185~205C Mold temperature: 20~50C Injection pressure: up to 1500bar Holding pressure: up to 1000bar Injection speed: In order to avoid material degradation, a general injection speed is generally used.
Runners and gates: All regular gates can be used. If you are working with smaller parts, it is best to use tip-type gates or submerged gates; for thicker parts, it is best to use fan-shaped gates. The minimum diameter of the tip or submerged gate shall be 1 mm; the thickness of the fan gate shall not be less than 1 mm.
Typical use:
Water supply pipes, household pipes, house wall panels, commercial machine casings, electronic product packaging, medical equipment, food packaging, etc.
Upvc pipe manufacturing process:
The process of manufacturing upvc pipe is: through computer processing, PVC resin, stabilizer, lubricant, coloring agent, filler are mixed, and then pumped into the extruder hopper, while heating, through the screw rotation, will The raw material is pushed forward, so that it gradually becomes a molten plasticizing belt, enters the die of the machine head, and extrudes the soft tubular product, and then passes through vacuum sizing, spray cooling, spray marking, traction cutting, expansion, etc. The series process is made into upvc tubing.
Pvc-u tube application:
The pvc-u tube is essentially a vacuum blister film used for surface packaging of various types of panels. It is also known as decorative film and adhesive film, and is used in many industries such as building materials, packaging, and medicine. Among them, the building materials industry accounts for the largest proportion, accounting for 60%, followed by the packaging industry, and there are several other small-scale applications.
Construction and maintenance of pvc-u pipe:
The connection method of pvc-u pipe mainly includes three kinds of sealing rubber ring, bonding and flange connection. Pipes with a diameter of 100 mm or more generally use a rubber ring interface; pipes with a pipe diameter of less than 100 mm generally use bonded joints, and some use live joints. When the pipeline crosses the sewer or other pipelines, the metal pipe is generally used, and the plastic pipe and the metal pipe are flanged. The connection between the front and rear of the valve and the pipe is also flanged.
1. When the small-diameter pipe is solvent-bonded, the socket should be rounded to form a groove, and the fracture should be flat and vertical, so that the joint can be firmly bonded to avoid water leakage.
2. PVC pipe with a diameter of 100 mm or more is a rubber ring interface. Before installation, personnel must be arranged to chamfer the pipe socket and check whether the quality of the rubber ring is qualified. The socket, apron, etc. must be wiped clean during installation.
3. Pipe trench excavation installed in traditional pipelines only requires the pipe to be placed in the pipe trench and can be sealed. When the original soil layer is not loosened, the cushion can be pressed without pressing.
4, the general pvc-u pipe branch pipe can be used with tee or vertical water stop bolt split. During the construction, a saddle-shaped fitting can be added with a half-closed tee and clamped with a U-shaped bolt, so that the wall is thickened, and then the hole is directly drilled and then externally threaded plastic parts are taken out. Tests have shown that the pressure test acceptance after construction by this method can fully meet the requirements of the specification. In addition, in the position where the water flow in the pipe generates thrust, such as the elbow, the tee and the pipe end sealing plate, the thrust pier should be provided to withstand the thrust of the water flow.
5. As a new type of non-metallic pipe, pvc-u pipe can not detect its specific location by using existing metal pipe detection equipment. However, if a pipe is buried in the pipeline, it can be easily solved by laying a wire on the pipe.
Bulletproof Mask,Ballistic Mask ,Ballistic Face Mask ,Bulletproof Face Mask
Bulletproof Product Co., Ltd. , http://www.rongyi-bodyarmor.com