Rubber Silicone Plastic Processing Water Cooling Heating Mixing Small Experimental Equipment

BAXIT small rubber silicone plastic water cooling heating mixer BXT-KL-16

Brief introduction:

一,open mixer equipment problem overview

Open mixing machine is short for open mixing machine, is one of the main equipment of rubber factory, rubber factory used to prepare plastic mixing rubber, mixing rubber or hot mixing, out of a roller exposed mixing machine. The main working parts are two different inward rotating hollow roller or drilling roller, the device on the operator's side is called the front roller, can be moved forward and backward through manual or electric action, so as to adjust the roller distance, to meet the operation requirements; The back roller is fixed and cannot be moved forward or backward. The size of the two rollers is generally the same, and each rotates at different speeds. The raw rubber or rubber material is involved in the gap between the two rollers with the rotation of the roller, and is subjected to strong shear action to achieve the purpose of plastic-mixing or mixing.

二,open mixer fault phenomenon and cause analysis

During the operation of the opening mixer in a rubber factory, the bearing was damaged, which caused the equipment to stop. The disassembly inspection found that the bearing position was seriously worn, and the wear amount of the serious position was about 3mm. If the bearing size is not repaired and restored in time, the bearing will continue to aggravate the wear, reduce the service life of the bearing, and appear abnormal noise and serious runout and swing in the operation of the equipment, which will seriously affect the stability of the equipment and product quality, and bring great trouble to the production enterprises.

Bearing a wear reason is mainly due to the bad working conditions, bearing in the process of long-term operation is larger, the lubrication time into foreign body result in bearing damage or due to bearing fatigue strength bearing and the bearing is no longer in "hold" status, bearing inner ring and bearing of relative movement, if not found in time and adopt measures to will cause gap widening, Directly cause bearing position wear.

三,Technical analysis of traditional restoration mode and composite material field restoration mode

(1) Traditional restoration mode

For bearing wear problem, conventional solution mainly by machining after welding, thermal spray and brush plating, and no good repair way to reduce the waste of money and time, and there are some disadvantages, both machining after welding and thermal spraying method, the thermal stress was an unavoidable phenomenon that cannot be eliminated. Easy to cause material damage, resulting in parts bending or fracture; The brush plating is limited by the thickness of the coating, easy to peel, and the above methods are to repair metal with metal, can not change the "hard to hard" relationship, under the comprehensive action of the forces, will still cause again wear. From the maintenance cost and maintenance period, this method is more to return to the factory to repair or rely on external cooperation, disassembly transportation cost is high, the repair period is long.

(2) Field repair mode of composite materials

In this restoration process, the composite material technology scraping method is used to repair. Firstly, the polymer composite material 2211F is applied to the parts to be repaired, and then the sample ruler is used to scratch the benchmark size along the unworn datum surface.

Polymer composites 2211 f is a kind of high temperature resistance, strong corrosion resistance and can be machined metal repair, protect composite material, this material has a good bonding power and mechanical performance, not only has the strength and hardness of metal, and its retreat, remove free repair using polymer materials shall not be machined without repair welding thermal stress effect, repair the thickness is not restricted, The application technology of polymer composite material can make the enterprise in the first time quickly and effectively repair the site, effectively avoid all kinds of time and economic losses, and the repair of polymer composite material belongs to cold welding technology, there is no thermal stress and other problems, can effectively avoid the secondary damage of the substrate. The metal repair material 2211F is more reliable.

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