Core Insert Making Guideline

When we manufacture the mold core and cavity inserts during the mold manufacturing, there are some dimensions that we need to manufacture with some tolerances so that it fits well in the pocket of the mold core insert.

And this will save some work when we will fit the mould core insert, high tolerance, and good manufacturing technology will save lots of time for the mold master, below are some manufacturing mold core /cavity insert Guideline that we need to pay attention to make high quality plastic mold.

When we make the corner radius In the manual milling machine, make a 0.2mm big step there, after hardening, we don’t have to grind on the corner when we fit the insert.

For the outside dimension of the mold cavity/core Inserts, the tolerance should be +0/-0.015mm, this will be easy fit into the pocket, smooth and good quality.

The tolerance for the hole to the sprue bushing should be H7 (0/+0.015mm).

The depth of the treading should be 1.5-2 multiply by the diameter of the tread. In this case for M8 screw, the depth of the treading should be 1.5 to 2 multiply by 8, equal to 12-16mm.

The guidance of the ejector pin should be about 15-20mm long, this will make sure that the ejector pins ejecting smoothly with long lifetime.

The clearance area for the ejector pins should be 1mm bigger than the diameter of the ejector pins., please see below illustration with explaining.

Specification

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Advance Precision Production Equipment -- Ensure the best quality and shortens the production Period!
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More than 100 sets of high-precision production equipment and test instruments, including CNC grinding machines, high precision ID/OD grinding and forming machines, CNC lathes, EDM processing machines, milling machines, plane & center grinding machines, wire-electrode cutting machines, Coordinate measuring machines(CMM), high-precision height gages, projectors, etc.

Professional Production Tolerance
1. Grinding tolerance ±0.001mm
2. EDM processing ±0.003mm
3. CNC processing ±0.005mm
4. Wire-electrode cutting ±0.003mm
5. Coaxiality, roundness and straightness ±0.002mm

Raw Material :
ABS mold, PP mold, PA mold, PE mold, PC mold, TPU mold, TPE mold, POM mold, Nylon mold, PA6+GF mold, PA6 mold, PET mold, HDPE mold, etc

Why Choose Us:

1. Provide low cost and short lead time.

2. Find best solution according to technical requirements and budget constraints.

3. Review technical issue according to your specificaiton.

4. Manage and report the process all though project process.

5. Assess capacity prior to committing the project schedule.

6. Regular vendor process review to promote supply chain management.

7. Experience mold engineers provide after sales technical support.

8. Very competitive price.

FAQ:

Q1. Are You A Manufacturer Or A Trading Company?
A: We are direct manufacturer with over 15 years' export experience for precision parts, welcome to visit us.

Q2. How Can I Get The Quotation?
A: Please contact our sales man with your demands, information include material, model number and any other special requirements.

Q3. Can You Produce Precise Parts According To Our Drawing Or Our Samples?
A: Yes, we can produce parts according to your 2D or 3D drawings, and we can make measurement for your samples to make drawings for production.

Q4. What Is The Quality Guarantee?
A: We will make 100% inspection before packing and delivery to make sure the products 100% meet your requirements.
We will keep the production drawing and test report with 3 months, if you found any problems when received the parts, please contact us at the first time, we will give you a solution within 8 hours.

Q5. How Do You Guarantee The Deliver Time?
A: We have independent PMC department to arrange the production plan.
We have production meeting every morning to report the production progress and discuss the problems.
We will make production progress report to you every week and take some pictures for your reference, that's you can know our production progress clearly.