1. Class 101 Molds
(SPI-SPE Standard, 1,000K cycles or more, long-term precision production molds)

Requires detailed mold construction drawings.

Minimum mold material hardness: 280 BHN (e.g., DME #2 steel / 4140 steel).

Mold cavity components must have a minimum hardness of 48–50 HRC.

Other components such as sliders, lifters, wedges, and inserts must also be hardened.

Temperature control is required for sliders and lifters.

If cooling is needed in sliders/lifters, stainless steel lines with proper temperature control must be used.

All cooling channels should preferably use 420 stainless steel with EDM finishing to prevent rust and debris buildup.

Locks must use angle pins or self-locking mechanisms.

2. Class 102 Molds
(Not exceeding 1,000K cycles, suitable for high-volume production)

Requires detailed mold construction drawings.

Minimum mold material hardness: 280 BHN (DME #2 steel / 4140 steel).

Cavity components must be at least 48–52 HRC.

All core/cavity parts must be hardened.

Use angle pins or self-locking as needed.

Note: The following features may or may not be required, depending on expected production volume.
Please confirm during quotation whether the following are necessary:
A. Top clamping plate
B. Guide pillars
C. Locating rings
D. Support pillars

3. Class 103 Molds
(Less than 500K cycles, medium-volume production molds)

Requires detailed construction drawings.

Minimum mold material hardness: 165 BHN (DME #1 steel / 1040 steel).

Mold cavity can use P20 steel (28–32 HRC) or pre-hardened steel (36–38 HRC), depending on requirements.

4. Class 104 Molds
(Less than 100K cycles, low-volume production)

Basic construction drawings required.

Mold material: P20 steel (28–32 HRC) or soft aluminum (e.g., 1040 steel).

Inserts and sliders may be softer steel, aluminum, or not hardened, depending on need.

5. Class 105 Molds
(Fewer than 500 cycles, prototype or test molds)

Aluminum molds, epoxy, or other soft materials are allowed,
as long as they provide sufficient strength for limited production or testing.

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Shenzhen JBR Precision Industry Product Co., Ltd. (JBR) was established in 1995 by Mr. Liang Chen. Located at Shenzhen city, Guangdong, China, its core competence is injection ...

CONTACT US

Buiding NO. 3, Xin Gang Lian Industrial Park,Songgang Town, Bao'an District, Shenzhen City, Guangdong Province, P.R.China

info@j-mold.com

0086-755-2706 5898 ext 809

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