Experimental Investigation on Mold Separation Characteristics of Toggle⁃type Full Electric Injection Molding Machine

doi:10.19491/j.issn.1001-9278.2020.05.010

Abstract

Abstract:

The phenomenon of mold separation caused by a cavity pressure greater than the clamping force during the injection molding process has a significant impact on the quality of injection?molded products. Based on an all?electric three?plate elbow?bar injection?molding machine, the characteristics of mold separation during the injection molding process and the change in clamping force caused by the mold separation were systematically investigated. The results indicated that the change in clamping force could reflect the degree of mold separation during the injection cycle of the toggle injection?molding machine. Both the increment of maximum clamping force and the change of clamping force could be used as an indicator to measure the weight of injection?molded product.

Key words: characteristics of mold separation, mold separation, maximum increment in clamping force, clamping force change

CLC Number:

TQ320.66⁺2

Gang LIU, Nanhong FU, Xiaolong JIAO, Xiyu DOU, Yuxuan XU, Pengcheng XIE. Experimental Investigation on Mold Separation Characteristics of Toggle⁃type Full Electric Injection Molding Machine[J]. China Plastics, 2020, 34(5): 59-62.

Figures/Tables 7

Fig.1. Structural diagram of the mold cavity

注射速度/

$m m ? s - 1$

转压点位置/

$m m$

保压压力/

$M P a$

保压时间/

$s$

储料位置/

$m m$

注射速度/

$m m ? s - 1$

转压点位置/

$m m$

保压压力/

$M P a$

保压时间/

$s$

储料位置/

$m m$

Tab.1. Main technological parameters of the experiment

Fig.2. Schematic diagram of variables related to mold separation characteristics

Fig.3. Mold separation characteristic curve

Fig.4. Clamping force?time curve

相关系数（r）
锁模力最大增量	锁模力变
0.99	-0.94

Tab.2. Maximum clamping force increase, clamping force change?product mass correlation coefficient

Fig.5. Maximum increase of clamping force?product mass, clamping force change?product mass curve

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