Modified polypropylene inner container precision cutting processing technique

Abstract

The invention discloses a modified polypropylene inner container precision cutting processing technique. The modified polypropylene inner container precision cutting processing technique comprises the following steps: a, pore-forming: drilling a pore at a calibrated hole-forming position by using a forming tool, controlling a tool rotary speed at 300-370 revolution per min (rpm), allowing a margin of 0.9-1.5 mm; b, cooling; c, finely reaming: finely processing the pore formed in the step a by using a reamer to remove burr, allowing the margin of 0.3-0.5 mm; d, grinding the finely reamed pore by using an abrasive paper with a sand fineness more than or equal to 600 meshes, grinding to cut the margin allowed after the finely reaming. By using the cutting processing technique provided by theinvention, the processing precision is high, and the product defect is hard to appear.

Description

technical field [0001] The invention relates to a precision cutting process for a modified polypropylene liner, wherein the inner liner is more specifically a solar water heater liner. Background technique [0002] In recent years, there have been plastic liner water tanks in domestic ordinary direct-plug non-pressurized solar water heaters. Generally, a water tank has 10-30 vacuum nozzles. The plastic liner can only be made into a "bottle-shaped" container with one opening in blow molding to form a blank. Generally, holes cannot be formed directly during the blank molding process. The 10-30 vacuum nozzles mentioned above can only Holes are formed by subsequent machining. According to technical requirements, the size of the nozzle must be relatively accurate, the tolerance range is small, the surface roughness after processing is small, and there are no burrs. However, it is still difficult to precisely cut plastic parts at present, because the material of plastic parts h...

AI Technical Summary

Problems solved by technology

However, it is still difficult to perform precision cutting on plastic parts at present, because the material of plastic parts has its special properties, that is, the softening point and melting point are relatively low, and the heat generated by general cutting is enough to make it soften and deform or even partially melt

Not only is it difficult to guarantee the accuracy of dimensions, but it is also difficult to guarantee the surface quality

[0003] This problem is particularly prominent in the solar energy industry. Once the plastic liner has poor dimensional accuracy or large burrs or poor surface quality, the direct consequence is that it will cause problems during use. water tank leaking

At present, most of the machining methods used in this industry in China only have one process of drilling, so it is difficult to guarantee the dimensional accuracy, which will cause problems in the future.