Maintenance and upkeep requirements for plastic pipe fitting molds

Plastic pipe fitting molds are key tools for producing plastic pipes, and their maintenance and upkeep directly affect the lifespan and production quality of the molds. The following are the comprehensive maintenance requirements for plastic pipe fitting molds:

1、 Daily maintenance requirements

Cleaning and rust prevention:

Immediately remove plastic residue from the mold cavity and mating surface after each production, use a copper brush or soft cloth to clean, and avoid scratching the mold surface with steel tools

Blow the debris in the gaps of the moving parts (such as the ejector pin and slider) with compressed air, and then wipe them with cleaning agent

The cooling water circuit needs to be regularly blown clean of impurities with compressed air to prevent the accumulation of scale from affecting the cooling effect

Lubrication and maintenance:

Moving parts such as ejector pins, guide posts, and sliders need to be lubricated once a day using high-temperature and high-pressure resistant grease (such as molybdenum disulfide grease)

Lubrication frequency should be increased under high-frequency use or high temperature conditions

Component inspection:

Check whether the top pin is bent or stuck, and the clearance between the guide column and guide sleeve (normal 0.02-0.05mm)

Check if there are any pressure marks, residual flying edges, or deformation on the mating surface

2、 Regular maintenance requirements

Deep cleaning:

Thoroughly clean the long-term unused molds every quarter and check the internal rust prevention effect

The cooling system is rinsed weekly with a specialized cleaning agent to remove scale

Professional maintenance:

Add oil to the mold every 12 hours, and increase the frequency of refueling for special structures

Check if the fixed template screws and locking clips are loose

Comprehensive inspection:

Regularly inspect mold parts such as mold cavity, mold core, guide column, etc., to ensure that there is no damage or crack

Adjust parameters such as injection pressure and speed according to production needs

3、 Common faults and their solutions

Difficulty in material removal from the gate:

Reason: Poor smoothness of the sprue taper hole, material too soft, or nozzle spherical curvature too small

Processing: Grind the taper hole to Ra0.4 or above, set the gate pulling rod or ejector mechanism

Damage to guide post:

Reason: Excessive lateral displacement force or use as a load-bearing component

Solution: Add positioning keys to ensure the perpendicularity between the guide column holes and the parting surface

Dynamic template bending:

Reason: Excessive back pressure or use of low strength steel plates

Solution: Select high-quality steel and add support columns or blocks if necessary

Top pole issue:

Reason: Excessive force on demolding or insufficient lubrication

Solution: Check if the ejector pin is bent and replace the severely worn ejector pin in a timely manner

4、 Storage requirements

Environmental control:

The storage environment should be dry, well ventilated, and avoid moisture and high temperatures

To prevent the mold from getting damp and rusting, apply specialized protective oil if necessary

Placement method:

The mold should be placed vertically or fixed with a dedicated bracket to avoid deformation caused by stacking

Molds that have not been used for a long time need to be drained of water in the cooling water circuit and blown dry

Management measures:

Establish mold archives to record usage and maintenance status

New molds should be classified and managed, and stored according to usage needs

Through the maintenance measures of the above system, the service life of plastic pipe fitting molds can be effectively extended, ensuring production quality and efficiency. It is recommended to establish a complete maintenance record system, regularly inspect the status of molds, and promptly identify and address potential issues.