UHMWPE Parts Customization-Hony Plastic

Advantages of UHMWPE molding production process

1. The loss of raw materials is small, will not cause excessive loss (usually 2%~5% of the product quality).

2. The internal stress of the product is very low, and the warping deformation is also very small, the mechanical properties are more stable.

3. The wear and tear of the mold cavity is very small, and the maintenance cost of the mold is low.

4. The cost of molding equipment is low, the mold structure is simple, the manufacturing cost is usually lower than the injection mold or transfer mold.

5. It can mold larger flat products. Molding can be formed by the size of the product only by the existing molding machine clamping force and template size.

6. The shrinkage of the product is small and repeatability is good.

7. In a given template can be placed on the mold cavity number of molds, high productivity.

8. It can be adapted to automatic feeding and automatic removal of products.

9. High production efficiency, easy to realize specialization and automatic production.

10. High dimensional accuracy and good repeatability.

11. Smooth surface, no need for secondary modification, can be molded once the complex structure of the product, mass production, the price is relatively low.

UHMWPE parts processing technology

1.Sintering molding process

Choose powder resin, molecular weight is not restricted; powder resin is pressed into various shapes of blanks (such as rods, plates, wheels, sets, etc.), the pressure is 42MPa, holding time is 30 ~ 90 seconds, the thermal expansion and contraction rate of the mold is 1 ~ 3%; and then sintered at 250 ~ 300 ℃, the sintering time according to the thickness of the product is determined to be 1 hour / 10mino

2. Extrusion molding process

UHMWPE resin should be used with LDPE, LCP or additives blended to improve fluidity. Equipment selection of plunger type or the same direction twin-screw extruder to avoid the shortcomings of low friction coefficient, the material is easy to slip. Extrusion temperature of 180 ~ 200 ℃, screw speed 10 ~ 15R / min; single-screw extruder can also be used for simple shaped products, but the need to increase the processing of auxiliary equipment, increase motor power.

3. Injection molding process

Should also be used with LDPE, LCP or additives co-mingled UHMWPE resin; injection molding machine screws and molds need to be improved. Injection pressure of 12OMPa or more, screw speed 40 ~ 60r/min, barrel temperature 180 ~ 220 ℃, mold temperature 85 ~ 110 ℃.

4. Extrude a pressure molding

Extrude the molten billet first, and then add the mold to make the required products.

Types of modification methods for UHMWPE parts

1.Lubricant modification

Adding lubricant in UHMWPE can improve its processing performance, but the amount added should not be too much, otherwise the performance of UHMWPE will be greatly reduced.

2. Liquid crystal polymer in-situ compounding technology

Add appropriate ratio of LCP and specific additives in UHMWPE, after mixing evenly, it can be pelletized smoothly by general-purpose single-screw extruder.

3.Other modification

Filling modification of UHMWPE with different fillers can achieve the effect of improving hardness, flame retardancy, heat resistance, shrinkage and abrasion resistance, reduce friction factor, reduce costs and so on. Fillers are generally treated with silane, the amount should not exceed 20%. In addition, the modification of UHMWPE with layered inorganic nano-materials by the insertion method technology can achieve a variety of modification effects such as enhancement. UHMWPE can also be modified by grafting, such as solid-phase grafting, solution grafting, suspension grafting, etc., in order to solve the problems related to interfacial compatibility.

Customized Applications for UHMWPE Parts

1. Bearings

UHMW can be used to make sliding bearings, such as rolling bearings and plain bearings. Its low coefficient of friction and wear resistance can reduce friction loss and improve bearing life.

2. Guide parts

UHMWPE is mainly used to manufacture guiding parts, such as guiding wheels and guiding plates. Its abrasion and corrosion resistance can maintain the accuracy and stability of guide parts.

3. Guides

UHMWPE can be used to manufacture guide rails, such as linear guides, slideways, etc. Its low coefficient of friction can reduce the resistance to movement. Its low coefficient of friction can reduce the resistance of movement and improve the smoothness of movement of guide rails.

4. Gears

UHMWPE can be used to manufacture gears, such as reduction gears, transmission gears and so on. Its wear resistance and low coefficient of friction can reduce the wear and energy loss between gears.

5. seals

UHMWPE can be used to manufacture seals, such as seals, gaskets and so on. Its corrosion resistance can maintain the sealing performance and life of seals.