In the mold injection processing, the problem is more prone to shrinkage. Why is that? How can we solve this problem?

　　模具缺陷

　　Mold defects

　　對此，澆口和（hé）流道截麵應根據具體情況適當擴大（dà），澆口位（wèi）置應盡量對稱設置，進料口應設（shè）置在（zài）塑件壁厚部分。如果在離澆口較遠的地（dì）方出現凹（āo）痕和（hé）縮痕，原因通常是模具結構中某處的熔體流動不暢，阻礙了（le）壓力傳遞。對此，模具澆注係統的結（jié）構尺（chǐ）寸應適當擴大，流道應盡量延長至出（chū）現凹陷的部位。

　　In this regard, the gate and runner section should be appropriately expanded according to the specific situation, the gate position should be set symmetrically as far as possible, and the feed inlet should be set in the wall thickness part of the plastic parts. If dents and indentations occur further away from the gate, they are usually due to poor melt flow somewhere in the mold structure, impeding pressure transfer. In this regard, the structural size of the casting system should be appropriately expanded, and the runner should be extended to the sunken part as far as possible.

　　機台問（wèn）題

　　The machine problem

　　噴嘴孔過大，熔（róng）料會倒流收縮，過小，阻力過大（dà），出料量不足。如果合模力不足，毛邊也會收縮，所以濟南注塑模具認為檢查合（hé）模係統是否有問題。塑（sù）化量不足，應選用塑化量大的機器，檢查螺杆、機筒（tǒng）是否磨損。機器設備的配置和維修檢查也不（bú）馬（mǎ）虎，加工中心、精雕等精密模具生產設備，還有各類注塑機，從設計開模到注塑，每一個環節嚴格把控（kòng），目（mù）的是提（tí）供更專業、更完善的服務。

　　If the nozzle hole is too large, the molten material will backflow and shrink. If the nozzle hole is too small, the resistance is too large and the discharge quantity is insufficient. If the clamping force is not enough, the burr edge will shrink, so Ji 'nan injection mold thinks that check whether there is a problem with the clamping system. If the plasticizing quantity is insufficient, the machine with large plasticizing quantity should be selected to check whether the screw and barrel are worn. Machine equipment configuration and maintenance inspection is not careless, processing center, precision carving and other precision mold production equipment, as well as all kinds of injection molding machine, from design to mold injection, each link is strictly controlled, the purpose is to provide more professional, more perfect service.

　　加工方麵

　　processing

　　料筒溫度過高，體積變化大，特別是前爐溫度。對於流動性較差的塑料，應適當提高溫度（dù）以保證光滑度。注射壓力、速度、背壓太（tài）低，注射時間太短，使物料體積（jī）或密度不（bú）足而收縮壓力、速度、背壓過大，時間過長，造成飛邊（biān）和縮（suō）水。加料量，即緩衝墊過大時，會消耗注射壓力，過小時，加料量不足。對精度要求不高的零件，注射保壓後，外層基本凝結硬化，夾層部分仍較軟可頂出，盡（jìn）快脫模，使它可以在空氣（qì）或熱水中緩慢（màn）冷（lěng）卻（què），可使（shǐ）縮孔平滑，不顯眼，不影響使用。

　　The barrel temperature is too high, and the volume changes greatly, especially the temperature of the front furnace. For plastic with poor fluidity, temperature should be appropriately raised to ensure smoothness. Injection pressure, speed, back pressure is too low, injection time is too short, so that the material volume or density is insufficient and the shrinkage pressure, speed, back pressure is too large, too long, resulting in flapping and shrinkage. The amount of feeding, that is, when the cushion is too large, it will consume the injection pressure, too small, the amount of feeding is insufficient. For parts with low precision requirements, after injection, the outer layer is basically condensed and hardened, and the sandwich part is still soft and can be pushed out as soon as possible, so that it can be cooled slowly in air or hot water, and the shrinkage cavity can be smooth, unobtruded and does not affect the use.

　　另外，原料不符合成型要求、塑件結構設（shè）計不合理（lǐ）也是注塑模具加工時出（chū）現收縮現象（xiàng）的原因，一定要各方麵多加注意才行，更多精彩內容就來http://www.lsjtcyjt.cn我們網站了解吧！

　　In addition, raw materials do not meet the requirements of molding, the unreasonable structural design of plastic parts is also the reason for the shrinkage phenomenon of injection mold processing, we must pay more attention to all aspects of the line, more exciting content to http://www.lsjtcyjt.cn our website to understand it!