The temperature of Jinan injection molding process has a great impact on the filling flow, curing and setting of plastic melt, production efficiency and the shape and dimensional accuracy of plastic parts.

每種塑料注射成型都（dōu）有一個合理的（de）模具溫度區域，使熔（róng）體的流動性好容易充滿型腔，塑（sù）件脫模後收縮和翹曲變形小、尺寸穩定，力學性能和表麵質量也高。為控製模具的溫度，必須（xū）設計溫度（dù）調節係統，一般采用模具冷卻或加熱的方（fāng）法，必要時兩種兼有，手機外殼模具中使用冷卻（què）裝置較多。

Each kind of plastic injection molding has a reasonable mold temperature area, which makes the melt flow well and easy to fill the mold cavity. After demoulding, the plastic parts have small shrinkage and warpage deformation, stable size, and high mechanical properties and surface quality. In order to control the temperature of the mold, the temperature regulation system must be designed. Generally, the method of mold cooling or heating is adopted. If necessary, both methods are used. There are many cooling devices in the mold of mobiles phones shell.

1. 溫度調節的必要性

1. Necessity of temperature regulation

模具溫度對膠件的成型質量、成型效率有著較大的影響。在溫度較高的模具裏，熔（róng）融膠料的流動性較好，有利（lì）於膠料充填型腔（qiāng），獲取高質量的膠件外（wài）觀表麵，但會使膠料固化時間變長（zhǎng），頂出（chū）時易變形，對結晶性膠料而言，更有利於（yú）結晶過程進行，避免存（cún）放及使用（yòng）中膠件尺寸（cùn）發生變化；在溫度較（jiào）低的（de）模具裏，熔融膠料難於充滿型腔（qiāng），導致內應力增加，表麵無光澤，產生銀紋、熔接痕等（děng）缺陷。

Mold temperature has a great influence on the forming quality and efficiency of rubber parts. In the mold with high temperature, the fluidity of molten rubber is good, which is conducive to filling the cavity and obtaining the appearance surface of high-quality rubber parts, but it will prolong the curing time of rubber and be easy to deform during ejection. For crystalline rubber, it is more conducive to the crystallization process and avoid the size change of rubber parts during storage and use; In the mold with low temperature, the molten rubber is difficult to fill the cavity, resulting in increased internal stress, dull surface, crazing, fusion marks and other defects.

不同的膠料具有不同的加工工藝性，並且各種（zhǒng）膠件的表麵（miàn）要求和結構不同，為了在有效的時間（jiān）內生產出符合質量要求的膠件（jiàn），這就要求模具保（bǎo）持一定的溫度，模溫越穩定，生產出的膠件在尺寸形狀、膠（jiāo）件（jiàn）外觀質量等方麵的要（yào）求就越一致。因此，除了模具製（zhì）造（zào）方麵的因素外，模溫是控製膠件質量（liàng）高低的重要因素，模具設計時應充分考慮模具溫（wēn）度（dù）的控製方法。

Different rubber materials have different processing techniques, and the surface requirements and structures of various rubber parts are different. In order to produce rubber parts that meet the quality requirements in the most effective time, the mold is required to maintain a certain temperature. The more stable the mold temperature is, the more consistent the requirements of the produced rubber parts in terms of size, shape, appearance quality and so on. Therefore, in addition to the factors of mold manufacturing, mold temperature is an important factor to control the quality of rubber parts. The control method of mold temperature should be fully considered in mold design.

2 . 模具溫度（dù）控製的原則

2 . Principle of mold temperature control

為了保證在有效的時間內生產出高外觀質量要求、尺寸穩定、變形小的膠件，設計時應（yīng）清楚了解模具溫（wēn）度控製（zhì）的基本原則。

In order to ensure the production of rubber parts with high appearance quality requirements, stable size and small deformation in the most effective time, the basic principles of mold temperature control should be clearly understood in the design.

① 不同膠料要求不同的模具溫度（dù）。

① Different rubber materials require different mold temperatures.

② 不同表麵質量、不同結構的模具要求不同的模具溫度，這就要求在設計溫（wēn）控（kòng）係統時具有（yǒu）針對性（xìng）。

② Molds with different surface quality and different structures require different mold temperatures, which requires pertinence in the design of temperature control system.

③ 前模的溫度高於後模的溫度，一般情況下溫度差為2~3?左右。

③ The temperature of the front mold is higher than that of the rear mold. Generally, the temperature difference is about 2 ~ 3 ?.

④ 有火花紋要（yào）求的前模溫度比一般光（guāng）麵要求的前模溫度高，當前模須通熱水或熱油時，一般溫度差為40?左右。

④ The temperature of the front die with spark pattern is higher than that required by the general smooth surface. When the front die needs hot water or hot oil, the general temperature difference is about 40 ?.

⑤ 當實際（jì）的模具溫度不能達到要求（qiú）模溫時，應對模具進行升溫，因此（cǐ）模具設計時，應充（chōng）分（fèn）考慮膠（jiāo）料帶入模具的熱量能否滿足模溫要求。

⑤ When the actual mold temperature cannot reach the required mold temperature, the mold shall be heated. Therefore, when designing the mold, we should fully consider whether the heat brought into the mold by the rubber can meet the mold temperature requirements.

⑥ 由膠料帶入模具的熱量除通過熱輻射、熱傳導的方式消耗外，絕（jué）大部分的（de）熱量需由循環的傳熱介質帶出模外。

⑥ Except that the heat brought into the mold by the rubber is consumed by heat radiation and heat conduction, most of the heat needs to be brought out of the mold by the circulating heat transfer medium.

⑦ 模溫（wēn）應（yīng）均衡，不能有局部過熱、過冷。

⑦ The mold temperature shall be balanced, and there shall be no local overheating and supercooling.