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Laying of moulds

  • Author:liuweiqiong
  • Source:liuweiqiong
  • Release on:2017-10-30
From 1 hours to 3 hours after spray coating, such as coating after curing, surface is not sticky, paving layer. At present, the traditional multi-step stacking method is adopted. 

1, raw materials. A, mold resin, mold resin has higher thermal deformation temperature and low shrinkage, we basically choose between benzene resin, vinyl resin. B, glass fiber reinforced material, short cut felt is a very good mold strengthening material, it can minimize the printing of fiber lines. Compared with knitted fiber felt and fiber woven products, short cut felt has more outstanding advantages.

2, the first floor. The mold layer begins from the top layer of the paste. The quality of the first layer requirements is very high, to avoid all die after the completion of the repair or damage to the possibility of gel. According to the complexity of the shape of the mold, paste the first layer fiber with 30 g / M 2 mat, 300 g / M 2, 450 g / M 2 whichincludesimportedwetthinfeltproductionline, laminated iron roller must be used carefully rolling layer, ensure that all bubbles had to catch the net, and to ensure the reasonable proportion of resin and fiber. 

3, thickening layer. Laminating process is generally M450 * 4~5+RX * N, small mold about 8mm thick, big mold guarantee 15mm or so. Producers must strictly implement the laminate process and schedule.

4. Pap hardness. A good way to lay out plans is to look at changes in the hardness of the layers. When the hardness of the deposited layer reaches 80%~90% of full curing hardness, the next layer can be applied. When measuring hardness by means of a Vickers hardness tester, attention should be paid to recording multiple readings and averaging out the hardness values.