Advantages:

(1) the loss of raw materials is small and will not result in excessive loss (usually 2%~5% of the product quality).

(2) the internal stress of the product is very low, and the warping deformation is very small, and the mechanical properties are relatively stable.

(3) mold cavity wear is very small, mold maintenance costs are low.

(4) the cost of the forming equipment is lower, and the die structure is simple, and the cost of manufacture is usually lower than that of the injection mold or the transfer molding mould.

(5) more than large flat products can be formed. The size of molded products can only be determined by the clamping force of the existing molding machine and the size of the template.

(6) the shrinkage rate of the product is small and the repeatability is good.

(7) mold cavity can be placed in a number of mold cavity on a given template, high productivity.

(7) mold cavity can be placed in a number of mold cavity on a given template, high productivity.

(8) can be adapted to automatic feeding and automatic removal of products.

(9) the production efficiency is high, it is easy to realize the specialization and the automation production.

(10) the product has high precision and good repeatability.

(11) the surface is smooth, no need for the two modification.

(12) a product that can be formed in a complex structure at a time.

(13) mass production, the price is relatively low.

Molding process flow:

(1) feeding: according to the need of adding a predetermined amount of material into the mould, and the feeding quantity directly affects the product of density and size. Feeding quantity more than product burr thickness, accurate size of poor and difficult to release, and may damage to the mold; small feeding amount, then the product is not close, luster, and even cause lack of material and waste generated.

(2) closing: after feeding even male and female mold is closed. When the mold with quick, to be Yin, male fast contact changed to slow. Soon after the first slow operation method to reduce non productive time, prevent scratch mold, avoid raw materials in the cavity due to clamping too soon be air, and even the insert displacement, the molding rod is destroyed. Until the mold is closed can increase the pressure to pressurize the raw material is heated.

(3) exhaust: thermosetting plastic is moulded, often water and low molecular weight compounds released in order to exclude these low molecular weight compounds, volatile volatiles and air, pressure relief loose die exhaust in a very short time in plastic mold die cavity of the plastic responses to appropriate time. Exhaust operation can shorten the curing time and improve the physical and mechanical properties of products, avoid the product internal delamination and bubble; but premature exhaust, sooner or later will not prematurely is not up to the purpose of exhaust; too late May due to the material surface has solidified gas row.

(4) curing: curing of thermosetting plastic is in the molding temperature maintained for a period of time, to achieve the required degree of crosslinking resin polycondensation reaction, make the products with the required physical and mechanical performance. Plastics curing rate is not high also WIP can complete demoulding curing will temporarily ended, and then reused after processing to complete the curing process; to improve the utilization rate of the equipment. Molded curing time usually in order to protect the pressure holding time, generally 30 seconds to a few minutes range, most not more than 30 minutes. Too long or too short curing time on the product performance has an impact.

(5) release: mold release is usually on the top of the rod to complete with a shaped rod or some of the embedded parts of the product should be the first to use a special tool to take off, and then carry out stripping.

(6) mold blow wash: after demoulding, usually use compressed air blowing wash mold cavity and the mold of the die face, if die fastener is tight, available copper knife or a copper brush clean, and even the need to polish brush.

(7) after treatment: in order to further improve the product quality, thermosetting plastic products after stripping is often under high temperature after treatment. After treatment can make plastic curing more completely; while reducing or eliminating the internal stress of products, reduce product of moisture and volatile, is conducive to improve the electrical properties and strength of products.