How to properly operate and maintain green sand molding machines?

I. Workflow of Green Sand Molding Machine [https://www.junengmachinery.com/products/]

Raw Material Processing

New sand requires drying treatment (moisture controlled below 2%)

Used sand needs crushing, magnetic separation, and cooling (to about 25 degrees C)

Harder stone materials are preferred, typically initially crushed using jaw crushers or cone crushers

Sand Mixing

Mixing equipment includes wheel-type, pendulum-type, blade-type, or rotor-type mixers

Mixing process points:

Add sand and water first, then bentonite (can reduce mixing time by 1/3-1/4)

Control water addition to 75% of total required water for wet mixing

Add supplemental water until compactness or moisture content meets standards

Mold Preparation

Fill prepared sand into molds

Mechanically compact to form molds (can be manual or machine molding)

Machine molding is suitable for mass production, improving efficiency and casting precision

Pre-Pouring Treatment

Mold assembly: Combine sand molds and cores into complete molds

No drying required before pouring (characteristic of green sand)

Post-Processing

Cool castings to appropriate temperature after pouring

Shakeout: Remove sand and core sand

Cleaning: Remove gates, risers, surface sand, and burrs

II. Operation and Maintenance Guide

1. Standard Operating Procedures

Pre-startup Checks

Verify that the vortex chamber observation door is securely closed

Confirm impeller rotation direction should be counterclockwise

Check all instrument readings and oil circuits

Run unloaded for 1-2 minutes before feeding

Shutdown Procedures

Continue operation until material is fully discharged after stopping feed

Check all safety conditions before powering off

Clean all machine parts and complete shift logs

2. Daily Maintenance

Regular Inspections

Check internal wear conditions per shift

Inspect drive belt tension for even force distribution

Verify safety devices are functional

Lubrication Maintenance

Use Mobil automotive grease, add every 400 operating hours

Clean spindle after 2000 operating hours

Replace bearings after 7200 operating hours

Wear Parts Maintenance

Rotor maintenance: Insert head into upper/lower disc holes, secure inner/outer rings with bolts

Hammer maintenance: Reverse when worn, maintain proper distance from strike plate

Plate hammer maintenance: Rotate positions regularly

3. Common Fault Handling

Symptom
Possible Cause
Solution

Unstable operation
Severe wear of impeller parts

Excessive feed size

Blockage in impeller flow

Replace worn parts

Control feed size

Clear blockage

Abnormal noise
Loose bolts, liners, or impeller
Tighten all components

Bearing overheating
Dust ingress

Bearing failure

Lack of lubrication

Clean contaminants

Replace bearing

Lubricate properly

Increased output size
Loose belt

Excessive feed size

Improper impeller speed

Adjust belt tension

Control feed size

Regulate impeller speed

Seal damage/oil leakage
Shaft sleeve rubbing

Seal wear

Replace seals

4. Safety Regulations

Personnel Requirements

Operators must be trained and certified

Designated operators only

Wear proper PPE (hairnets for female workers)

Operation Safety

Notify all personnel before startup

Never reach into moving parts

Stop immediately for abnormal noises

Maintenance Safety

Power off before troubleshooting

Use warning tags during internal repairs

Never remove safety guards or modify wiring

Environmental Safety

Keep work area clean and clear

Ensure proper ventilation and lighting

Maintain functional fire extinguishers

Image: https://www.junengmachinery.com/uploads/junengFactory.jpg

Quanzhou Juneng Machinery Co.,Ltd. is a subsidiary of Shengda Machinery Co.,Ltd. specializing in casting equipment. A high-tech R&D enterprise that has long been engaged in the development and production of casting equipment, automatic molding machines, and casting assembly lines.

If you need a Green Sand Molding Machine [https://www.junengmachinery.com/products/], you can contact us through the following contact information:

Sales Manager : zoe

E-mail : zoe@junengmachine.com [mailto:zoe@junengmachine.com]

Telephone : +86 13030998585

Media Contact
Company Name: Quanzhou Juneng Machinery Co.,Ltd.
Email:Send Email [https://www.abnewswire.com/email_contact_us.php?pr=how-to-properly-operate-and-maintain-green-sand-molding-machines]
Country: China
Website: https://www.junengmachinery.com/

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