Common tie bar placement issues & fixes includes mismatch between mold and injection molding machine, inconsistent or deformed rod length, etc.
The tie bar distance refers to the distance between the horizontal and vertical tie bars in an injection molding machine, which directly affects the size and installation method of the mold. Specifically, the width of the mold should be less than half of the horizontal rod spacing, and the length should be less than half of the vertical rod spacing
The placement problem and solution of injection molding machine pull rod can be analyzed and summarized from the following aspects.
Common tie bar placement issues
1. Mismatch between mold and injection molding machine:
When installing the mold, if the mold size does not match the injection molding machine model, it may cause the pull rod to not be installed or fixed correctly, thereby affecting the stability of the mold.
2. Inconsistent or deformed rod length:
Due to the uneven length of the four rods or the influence of heat and cold stress, they bend, resulting in uneven stress and leading to fracture.
3. Improper fixing method of the pull rod:
if the pull rod nut is not cleaned or the lubricating oil is insufficient, the pull rod cannot work properly.
Unreasonable mold design: for example, improper design of the unloading groove of the mold, resulting in excessive stress on the pull rod.
Common tie bar placement fixes
1. Ensure that the mold matches the injection molding machine:
Before installation, check whether the size of the mold matches the model of the injection molding machine, and confirm the number and position of the pull rods.
2. Optimize the length and material selection of the pull rod:
Avoid sudden changes in shaft diameter, choose materials with good comprehensive performance, and reduce stress concentration through rounded transitions.
3. Strengthen rod fixation:
Use double nut locking or shoulder shaft support to secure the rod and ensure its stability.
4. Improve mold design:
Optimize the design of the unloading groove, reduce the bending deformation of the fixed template, and minimize the adverse effects of the four pull rod bias load.
5. Regular maintenance and inspection:
Regularly clean the rod nut and add lubricating grease to avoid jamming caused by insufficient lubrication.
6. Using data analysis tools:
By monitoring device performance data, quickly diagnose and adjust rod balance.
Specific operating steps:
1. Preparation before installation: Check the integrity of the mold, confirm the number and position of the pull rods.
2. Adjust the length of the pull rod: Ensure that the lengths of the four pull rods are consistent, and correct them if necessary by using copper pads, paper, or other methods.
3. Fixed pull rod: Use double nut locking or shoulder shaft support to fix the pull rod, ensuring it is horizontal and stable.
4. Trial operation inspection: After installation, conduct a trial operation to check for leaks or other abnormal situations.
Through the above measures, the problems that occur during the placement of the pull rod in the injection molding machine can be effectively solved, and the service life and production efficiency of the mold can be improved.
Haichen injection molding machine
Haichen is one Chinese injection molding machine manufacturer. Our servo energy saving injection molding machines quality under CE safety standards certificated.
Haichen have rich experience of producing plastic products, with successfully cases for your reference. We can supply complete production line as per customer’s specific demand.
Consider the above. You can choose a suitable plastic injection molding machine and mold to ensure product’s quality and production efficiency.
