塑胶射出成型模的理想浇口 SAMT青岛年会 090511.ppt

結論 Conclusion 一般來說，澆口關鍵尺寸在不大於加澆口處的產品厚度的前提下，愈大愈好。 為了避免見到較大的澆口痕跡， 澆口可加在隱蔽處；為了避免去澆口的困難，帶銳角的缺口(如圖7的矩形邊緣澆口、圖8的潛伏式澆口、圖9的針點澆口)可以併入澆口設計。 Generally speaking, the key dimension of a gate is the larger the better as long as it is not larger than the thickness of the part where the gate is attached to. In order not to see a larger gate vestige, gate can be located at a nonappearance surface of the part. For easier degating, a sharp notch can be incorporated into the gate design (e.g. the rectangular edge gate in Figure 7, the submarine gate in Figure 8, and the pin gate in Figure 9). 在爱护环境、珍惜资源、 持续发展的前提下，促进精实高效成型科技的发展与创新。 -先进成型技术学会- 问答 ？ 谢谢 ！ 塑膠射出成型模的理想澆口IDEAL GATE OF PLASTIC INJECTION MOLD 徐 昌 煜Charles Hsu先進成型技術學會 創會理事Founding Director, SAMT 2011年9月5日於山東省青島市黃海飯店 為了產品的美觀和去澆口的簡易， 許多塑膠射出成型模採用的澆口偏小。 然而，塑膠射出成型模澆口的大小與產品良率和成型週期息息相關，本文嘗試導出理想澆口的關鍵尺寸和形狀。 Small gates are commonly used in many plastic injection molds for reasons of better part appearance and easier degating. However, the size of the gate is closely related with the yield and cycle time of a plastic injection molding part. This article tries to derive the key dimension and shape of an ideal gate. 摘要 Abstract 前言 Preface 經過幾個實例的探討，認識澆口關鍵尺寸對注塑缺陷以及成型時間的影響，找出訂定理想澆口的原則，確保產品的品質和生產力。 ? Through the review of several case studies, we would know of the effects of the gate key dimension to plastic injection molding defects and cycle time and find out the principles of deriving an ideal gate, in order to guarantee the quality and productivity of plastic part. 澆口的關鍵尺寸 Key Dimension of a Gate 澆口的關鍵尺寸是澆口最小斷面的最小尺寸。 該最小尺寸或為厚度或為直徑，就矩形斷面的邊緣澆口(edge gate)而言是其厚度，就針點澆口(pin gate)而言是其直徑， 就橢圓形斷面的潛伏式澆口(submarine gate)而言是橢圓的短軸軸長。 ? The key dimension of a gate is the smallest dimension of the smallest cross-section of the gate. This dimension can be the thickness of a rectangular edge gate or the diameter of a pin gate or the leng