Advice on maintenance of precision injection molding

Advice on maintenance of precision injection molding

30 Nov 2019

Compared with other molds, the precision injection molding is more complicated and precise, and the requirements for operation and maintenance of the product are higher. Therefore, in the whole production process, the correct use and careful maintenance and maintenance will maintain the normal production and improve the enterprise. Benefits are of great significance.

precision injection molding

First, select the appropriate molding equipment, determine the reasonable process conditions, if the injection molding machine is too small, it can not meet the requirements, too much is a waste of energy, and will damage the mold or template due to improper adjustment of the clamping force, reducing efficiency.

When selecting the injection machine, the maximum injection amount, the effective distance of the tie rod, the mold mounting size on the template, the maximum mold thickness, the minimum mold thickness, the template stroke, the ejection mode, the ejection stroke, the injection pressure, the clamping force, etc. should be performed. Verification, can be used after the request is sufficient.

Second, after the mold is mounted on the injection machine, the empty mold must be operated first. Observe whether the operation of each part is flexible, whether there is abnormal phenomenon, the ejection stroke, whether the opening stroke is in place, whether the parting surface is tightly matched when the mold is closed, and whether the pressure plate screw is tightened.

Third, when the mold is used, it is necessary to maintain normal temperature and work under normal temperature to extend the service life of the mold.

Fourth, the sliding parts on the mold should be observed at any time, scrub and add grease at the right time to ensure that these sliding parts are flexible and prevent tight seizure.

Fifth. Before each mold clamping, it should be noted that whether the cavity is cleaned or not, no residual products or any other foreign objects are allowed.

Sixth, the cavity surface has special requirements of the mold, the surface roughness Ra is less than or equal to 0.2cm, absolutely can not be wiped by hand or cotton, apply compressed air, or use advanced napkins and high-grade cotton wool to gently rub the alcohol wipe.

Senventh.The surface of the cavity should be cleaned regularly. The injection mold will decompose the low molecular compound to corrode the mold cavity during the molding process, so that the surface of the bright cavity gradually becomes dull and reduces the quality of the product, so it needs to be scrubbed regularly.