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Die-cast cage and cast cage
Source: China Bearing Network Time: 2017-11-15
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1. The original data of the die-casting cage made by die-casting method is aluminum alloy and brass; the original data is melted and poured into the die-casting mold of the die-casting machine; the cage is die-casted at one time. The casting gate is driven on the lathe. The process characteristics are:
(1) The cage is directly die-casted; it can achieve outstanding shape and scale accuracy; no machining is required; production efficiency is high.
(2) After die-casting; metal crystals are condensed; finely arranged; good appearance and wear resistance.
(3) High data utilization rate; lower cost.
However, when die-casting aluminum alloy cages; large-tonnage equipment is required; mold design and production are messy; the die-casting holes are simply scratched during die-casting. Under the condition that the bearings are subjected to impact, sensation and speed, the demand is further improved. the quality of.
2. Plastic casting method to make the cage to put the vacuum dry granular engineering plastic into the barrel; to melt into a semi-liquid state by heating with a resistance wire; pressurizing with a plunger or moving the screw; and writing the semi-liquid material from the nozzle into the injection molding machine In the forming mold; after holding and cooling, the required cage is obtained. His technological features are:
(1) The holder is plastically formed at one time; it can obtain accurate shape and scale accuracy and low surface roughness value; no machining is required; production efficiency is high.
(2) Simple mold and plastic casting; easy installation of bearings; simple automatic control.
(3) Plastic cages have outstanding functions such as wear resistance, antimagnetic and low conflict.
However, due to the defects of thermal deformation, aging and brittleness of the plastic itself; and some problems in the layout of the cage and the plastic injection process; the use of the plastic cage is limited.
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