The screw injection molding machine differentiates from the plunger injection molding machine mainly in that the horizontally-pushed plunger in the charging barrel is replaced by a rotary screw which undertakes all the fusion, plastication as well as injection of the materials in the charging barrel. […]
The plunger injection molding machine pushes forward the fused plastics in the charging barrel […]
According to the TIR made by testing workers and the TVR by quality inspection department, the MPI (Manufacture Processing Instruction) can thereby be formulated, wherein the following aspects are included: […]
Mold Verify Report (TVR) is based on the products acquired from mold testing to assess whether corresponding molds reach the requirement through the measurement thereof. […]
The improper design for the structure of plastic parts, the incorrect setting of injection molding technical condition, inappropriate design of mold feed system, […]
During ejection, white ejector mark usually appears on the plastic parts in contact with the ejector pin and such ejector mark will easily crack during actual use of the products. The causes thereof comprise: […]
The injection parts stick to the mold, making it rather difficult for ejection. The causes thereof comprise: […]
The condensed material of sprue sticks to the sprue of molds, which poses difficulty for ejection. […]
Color is normal on the surface of products, though black spots or lines occasionally occur. The dark spots or black lines are fundamentally caused by the thermal degradation of material or carbonization of impurities due to various factors. The raw material is mixed with impurities (such as impurities falling off when the operator is unripping [...]
Aberration refers to the discrepancy of color on the products wherein the tint is uneven. The causes whereof comprise: […]