塑胶制品模具的制造和设计

一、设计依据
尺寸精度与其相关尺寸的正确性。
根据塑胶制品的整个产品上的具体要和功能来确定其外面质量和具体尺寸属于哪一种:
外观质量要求较高,尺寸精度要求较低的塑胶制品,如玩具;
功能性塑胶制品,尺寸要求严格;
外观与尺寸都要求很严的塑胶制品,如照相机。
脱模斜度是否合理。
脱模斜度直接关系到塑胶制品的脱模和质量,即关系到注射过程中,注射是否能顺利进行:
脱模斜度有足够;
斜度要与塑胶制品在成型的分模或分模面相适应;是否会影响外观和壁厚尺寸的精度;
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塑膠注塑模使用行位(Slide側向抽芯)結构

 

1. 塑膠注塑模在什么情況下需要使用行位(Slide側向抽芯)結构。
A)有側凹或倒扣 B)側面(壁)不允許有出模角 C)包R枕位枕出有較大陰陽啤把嚴重影響產品外觀
2. 根据側凹位置,行位分內側行位和外側行位,按前后模又可分前模行位(行位在A板內滑動)和后模行位(行位在B板內滑動) 。前模行位常用較杯(前模哈夫Half)形式,因結构簡單,鎖模效果好,當不能采用較杯形式時,必須設計特殊結构的模胚,即面板与A板間應有一次分型。
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行业标准规范英汉对照-工艺装备2

151 GB/T 4257-1984 扩孔钻技术条件 Core drills--Technical requirements
152 GB/T 4258-1984 60°、90°、120°直柄锥面锪钻 Countersinks with parallel shanks for angles 60°90°and 120°inclusive
153 GB/T 4259-1984 锥面锪钻技术条件 Countersinks--technical requirements
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行业标准规范英汉对照-工艺装备

1 GB/T 967-1994 螺母丝锥 Nut taps
2 GB/T 968-1994 丝锥螺纹公差 Manufacturing tolerances on the threaded portion of taps
3 GB/T 969-1994 丝锥技术条件 Technical specification for taps
4 GB/T 970.1-1994 圆板牙 型式和尺寸 The types and dimensions for circular screwing dies
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Injection Mold Slide and lifter Standards

Injection Mold Slide and lifter Standards

Section 2: Slides/Lifters Standards and Design
Contents:
A) Mechanical injecion mold Slide Design Standards
B) Hydraulic injecion mold Slide Design Standards
B) Injection Mold Lifter Standard
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Demonstrate SLA process planning capabilities

Demonstrate SLA process planning capabilities that combine adaptive slicing and
orientation concerns with trade-offs among build time, surface finish, and accuracy.
 When building a part on SLA machine, sometimes a designer is interested in the best
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Plastic mold, Plastic mould

Mold or die are the common terms used to describe the tooling used to produce plastic parts in molding.

Traditionally, molds have been expensive to manufacture. They were usually only used in mass production where thousands of parts were being produced. Molds are typically constructed from hardened steel, pre-hardened steel, aluminium, and/or beryllium-copper alloy. The choice of material to build a mold from is primarily one of economics, steel molds generally cost more to construct, but their longer lifespan will offset the higher initial cost over a higher number of parts made before wearing out. Pre-hardened steel molds are less wear resistant and are used for lower volume requirements or larger components. The steel hardness is typically 38-45 on the Rockwell-C scale. Hardened steel molds are heat treated after machining. These are by far the superior in terms of wear resistance and lifespan. Typical hardness ranges between 50 and 60 Rockwell-C (HRC). Aluminium molds can cost substantially less, and when designed and machined with modern computerized equipment, can be economical for molding tens or even hundreds of thousands of parts. Beryllium copper is used in areas of the mold which require fast heat removal or areas that see the most shear heat generated.The molds can be manufactured by either CNC machining or by using Electrical Discharge Machining processes

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Injection molding, Plastic injection mould

Injection molding (British English: moulding) is a manufacturing process for producing parts from both thermoplastic and thermosetting plastic materials. Material is fed into a heated barrel, mixed, and forced into a mold cavity where it cools and hardens to the configuration of the mold cavity.  After a product is designed, usually by an industrial designer or an engineer, molds are made by a moldmaker (or toolmaker) from metal, usually either steel or aluminium, and precision-machined to form the features of the desired part. Injection molding is widely used for manufacturing a variety of parts, from the smallest component to entire body panels of cars.

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