General Introduction

Wishpower masters the production process of silicone rubber with excellent electrical properties. Provides stable quality and competitive prices for our final products.

With the expansion of business scale, Wishpower acquired several metal processing plants to meet higher precision requirements and production capacity requirements.

Pultrusion is a manufacturing process for producing continuous lengths of reinforced polymer structural shapes with constant cross-sections. Raw materials are a liquid resin mixture (containing resin, fillers and specialized additives) and flexible textile reinforcing fibers. The process involves pulling these raw materials (rather than pushing, as is the case in extrusion) through a heated steel forming die using a continuous pulling device.

The reinforcement materials are in continuous forms such as rolls of fiberglass mat and doffs of fiberglass roving. As the reinforcements are saturated with the resin mixture (“wet-out”) in the resin bath and pulled through the die, the gelation, or hardening, of the resin is initiated by the heat from the die and a rigid, cured profile is formed that corresponds to the shape of the die.
While pultrusion machine design varies with part geometry, the basic pultrusion process concept is described in the schematic shown below.

Raw Material / Parts Inspection

The produciton and inspection of Electric insulation silicone rubber

Silicone rubber standard: DL/T 376-2010
Electrical performance
1. Volume resistivity ≥1.0 X 10 Ω·m;
2.Surface resistivity ≥1.0 X 10 Ω;
3.Breakdown strength AC ≥20KV/mm, DC≥30KV/mm;
4.Tracking and electrical erosion ≥TMA4.5 grade;
5，Hydrophobicity satisfy the requirement on standard 6.2

Mechanical performance
1，Tearing strength（rectangularity）≥10kN/m;
2，Mechanical breaking strength ≥4MPa;
3，Tensile elongation ≥150%；
4，Shaw intensity ≥50Shore A;
5，Flammability≥ FV-0

Aging resistance
1. Ageing test for 1,000 hours

Hardware inspection procedures：Ball and socket（IEC 60120)：
1.Appearance
2.Dimension inspection
3.Zinc layer thickness inspection
4.Hardness inspection
5.go no-go gauge（ball and socket）
6.Locking system inspection

Wish rods will be applied below test according to rod inspection processure
and IEC61109:
1.Appearance
2.Dimension inspection
3.Dye penetration test
4.Water difussion test
5.Stress corrosion test(acid-resistant rod)
6.Power frequency test
7.40kV/10mm oil puncture test

Production Machines

Quality Control

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