Relationship between Operating Variables and Temperature of Elastomer Entering the Mold on a Coaxial Screw/Pot Injection Molding Machine

1976 ◽  
Vol 49 (1) ◽  
pp. 28-33
Author(s):  
D. Reber ◽  
I. Chen ◽  
K. J. Siwiecki
Keyword(s):  
Injection Molding ◽  
Linear Model ◽  
Material Properties ◽  
Induction Time ◽  
Minor Effect ◽  
Molding Machine ◽  
Injection Molding Machine ◽  
Shear Rates ◽  
Operating Variables ◽  
Low Shear

Abstract The conclusions from this study are : 1. A linear model can be easily developed and is a useful tool to aid in setting up an injection molding machine. 2. An elastomer temperature in the holding chamber close to the 3-min induction-time temperature usually yields reasonable cure times without scorch in the coaxial screw/pot machine described. 3. Material properties, especially viscosity, seem to have a relatively minor effect on elastomer purge temperature because of low shear rates. However, in a mold with small runners viscosity could have a significant effect on elastomer temperature.

Choice and Exchange of Lubricating Oil for Injection Molding Machine

2019 ◽  
Vol 12 (4) ◽  
pp. 378-382
Author(s):  
Shan Syedhidayat ◽  
Quan Wang ◽  
Al-Hadad M.A.A. Mohsen ◽  
Jinrong Wang
Keyword(s):  
Injection Molding ◽  
Dimensional Accuracy ◽  
Low Noise ◽  
Working Environment ◽  
Lubricating Oil ◽  
Lubrication System ◽  
Molding Machine ◽  
Oil And Grease ◽  
Injection Molding Machine ◽  
The Stability

Background: One of the most common manufacturing equipment for polymer product is injection molding machine. In order to ensure the precise, stable and continuous operation of the injection molding machine, the maintenance of the lubrication system must be done well. The stability, reliability, rationality and low noise performance of the lubrication system of injection molding machine directly affect the quality of injection products, dimensional accuracy, molding cycle, working environment and maintenance. Objective: The purpose of this study is to introduce the methods of choice, maintenance of lubricating oil for injection molding machine from many literatures and patents in the recent years, such as lubricating oil device, lubricating composite and structure. Methods: An example of the 260M5 automatic injection molding machine is introduced for the inspection and maintenance of the lubrication system including lubricating oil and lubricating grease. Results: To ensure the lubrication of the injection molding machine, it needs to strictly observe the lubrication time and modulus of the injection molding machine. It needs to strictly control the temperature rise of the lubricating oil and select the correct lubricating oil and grease to ensure the lubrication quality. Conclusion: In the operation of the injection molding machine, it is necessary to check that the lubricating oil is sufficient and the lubricating points are working properly. It ensures sufficient lubrication of the injection molding machine and strictly observes the lubrication time and modulus of the injection molding machine. The stored lubricating oil should be sealed well to prevent air pollution.

Analysis on vibration characteristics of screw in filling process of dynamic injection molding machine

2016 ◽  
Vol 36 (8) ◽  
pp. 861-866 ◽  
Author(s):  
Quan Wang ◽  
Zhenghuan Wu
Keyword(s):  
Injection Molding ◽  
Processing Parameters ◽  
Axial Vibration ◽  
Filling Process ◽  
Molding Machine ◽  
Lumped Mass ◽  
Injection Molding Machine ◽  
Injection Speed ◽  
And Performance ◽  
Injection Screw

Abstract This paper presents a study of the characteristics of axial vibration of a screw in the filling process for a novel dynamic injection molding machine. By simplifying a generalized model of the injection screw, physical and mathematic models are established to describe the dynamic response of the axial vibration of a screw using the method of lumped-mass. The damping coefficient of the screw is calculated in the dynamic filling process. The amplitude-frequency characteristics are analyzed by the simulation and experimental test of polypropylene. The results show that the amplitude of a dynamic injection molding machine is not only is related to structure parameters of the screw and performance of the material, such as non-Newtonian index, but also depends on the processing parameters, such as vibration intensity and injection speed.

Based on Vector Control of All-Electric Injection Molding Machine Control System Design

2012 ◽  
Vol 490-495 ◽  
pp. 2210-2214
Author(s):  
Ming Hui Li ◽  
Zheng Qi Li
Keyword(s):  
Control System ◽  
Injection Molding ◽  
Vector Control ◽  
System Design ◽  
High Reliability ◽  
Permanent Magnet Synchronous Motor ◽  
Control System Design ◽  
Molding Machine ◽  
Injection Molding Machine ◽  
Machine Control

According to the all-electric injection molding machine control system requirements, the vector control applied to the permanent magnet synchronous motor control, we propose a fully electric injection molding machine control system design, through analysis and research that can further improve the program precise all-electric injection molding machine control, its stability, high reliability, to better meet the all-electric injection molding machine of precision and stability requirements.

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