2.模具的基本结构 模具的基本结构 模具的基本 （1）工作原理 从根本上说，注射模具包括两个部分:一部分包括浇口和浇注系统，另 一部分是放置顶出系统。模具零件是在分型面被定位的（参考DIN 16700）。
basically ‘beisikəli ] ad. 基本上,主要地 Consists of [ kən‘sist ] v.由… 组成 halves [ hɑ:vz ] 同分数 is located at被放置在 DIN 16700德国标准化组织16700
模具结构
Efficient production of the most diverse injection -molded parts depends primarily on the injection mold.
高效率地生产各类注射成型 注射成型零件首先取决于 取决于注射模具。 高效率地 注射成型 取决于 diverse [ dai'və:s ] a. 不同的, 多种多样的
Unit One
Mold Constructions
模具结构
2.Basic Mold Construction （1）Operating Principle Basically the injection mold consists of two halves. One mold half contains the sprue bushing and runner system， the other half houses the ejection system. The molded part is located at the parting line（ref. To DIN 16700）.
Unit One
பைடு நூலகம்
Mold Constructions
The production time required for a given molded part depends on the wall thickness， the injection speed， the recovery rate， the time required to cool the molded material， the cooling capacity of the mold and the necessary incidental time such as duration of pressure holding time， ejection time， delay time， etc.
Unit One
Mold Constructions
③injection -molding machine（ clamping force， plasticizing and injection capacity）; ④mold costs. There are several known procedures for calculating the economical number of cavities. Unfortunately they are so varied that it is impossible to condense them.
For ease of construction and to lower manufacturing cost， injection molds are becoming standardized. Some firms offer ready -made bases of square or round design as standard or stripper plate molds for immediate use. Only the inserts then have to be fitted into the bases.
因此确定型腔数量的主要因素涉及以下几点: ①订单大小（制品数量及相关交货时间）; ②制品形状（尺寸、质量要求）; Therefore [‘ðɛəfɔ:] 因此;因而;所以 Concerning [kən‘sə:niŋ] 关于，因素 Cavities [‘kæviti] 型控 母模 Order订购;订货，汇票,汇单 Delivery [di‘livəri] 交付,交货 Shape [ʃeip] 形状;样子,外形
一个给定的模具零件的生产周期取决于壁厚、注射速度、收缩 率、模内材料的冷却时间、冷却的效能及必要的辅助时间，如压 力持续时间、排气时间及延迟时间等。
Recovery rate [ri‘kʌvəri] 回收率 ,复原 Capacity [kə‘pæsiti] 容量,容积,能量,生产力 incidental [,insi‘dentl]附带的 ,伴随的,辅助的 such as 例如 Duration [dju'reiʃən] 持续,持久;持续期间
③注射机（合模力、可塑性、注射容量）; ④模具费用。 尽管已有多种计算经济型腔数目的方法，但这些计算方法多种多 样，根本没法将它们提炼成为简便公式。 clamping force [klæmp] 夹紧力，合模力 Capacity [kə‘pæsiti]容量,容积 Procedures [prə‘si:dʒə]程序;方法;步骤 Unfortunately遗憾地;不幸地 Condense [kən‘dens]压缩;浓缩 ；使简洁,缩短
Unit One
Mold Constructions
As an example: The theoretical max. number of cavities is: F1=Max.injection volume of machine（cm3）/Volume of molded parts，sprue and runner（cm3） F2=Plasticizing capacity（cm3/min）/Number of shots/min× （part，sprue and runner（cm3）） F2 must be equal to or smaller than F1. F1 is the maximum number of cavities attainable.
Unit One
Mold Constructions
（2） Single or Multicavity Molds To set up a calculation conceiving the choice of cavities in an injection mold requires accurate knowledge of the material to be processed， of the injection -molding machine and of the molds. The mold costs increase with the rising number of cavities and the relative machine costs decrease.
continue [ kən‘tinju: ] v. 继续,连续 ； development[ di’veləpmənt ] n. 发展,显影 technology[ tek‘nɔlədʒi ] n. 技术,工艺 ；demands[ di’mɑ:nd ] v. 要求 processes[ prə‘ses ] n. 过程， 工艺流程 过程，
Unit One
Mold Constructions
Therefore the decision concerning the number of cavities to be determined depends on: ①size of the order（number of molded parts in connection with delivery time）; ②shape of the molded parts（size， quality requirements）;
undoubtedly[ ʌn‘daʊtidli ] ad. 无疑(毕定) molding shop 成型车间 influence[ ‘influəns ] v. 影响 if any”引出转折状语从句，译为“即便要”。 引出转折状语从句，译为“即便要” on对，依赖
Unit One
Mold Constructions
The durability of the molds depends on their care and treatment. Since the moving components and cavity of the mold are always hardened and ground ， they should produce between 500 000 and 1 000 000 000 shots.
Unit One
Mold Constructions
模具结构
Passage One Plastics
Forming and Molds
第一段 第二段
塑料成型与模具
Passage Two Three
-plate Injection Molds
三板式注射模具
Mold [ məuld ] 模具 Constructions [ kən‘strʌkʃən ] 结构 Passage [ ‘pæsidʒ ] 段落 Plastics [ 'plæstiks ] 塑料 Forming [ fɔ:m ] 形成和成型 plate[ pleit ] 碟,盘,金属板,板块 Injection [ in'dʒekʃən ] 注射
模具的使用寿命取决于对它们的维护保养和加工处理，例如对一 些活动件及型腔的表面硬化和磨削加工，使得它们的生产批量可 以达到500 000～1 000 000 000件。 Grind [ graind ] （ground，ground） v.磨削，磨光