jacob@gainpower-mfg.com

GPMFG

Top Mold / tooling manufacturer in China

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Beginning of project

Mold Design&Project Management

GPMFG provides complete Engineering support from Tooling/Mold Development,Manufactring,Test,Trial production and after sales

Usual drawing format:stp,step,x_t

Customized Tooling/Molds For Your Industries

We Understand More About The Needs Of The Industry, You Just Need To Provide The Design.

Molds for Plastic Injection Molding

Single Cavity Mold

Single cavity molds usually are applied for small or medium mass production.Each injection produces only one part,so the mold cost is low but the production cost is high. Lead-time: around 3-5 weeks.

Multi Cavity Mold

Multi-cavity molds usually are applied for big mass production.Each injection produces several same parts,so the mold cost is high but the production cost is low. Lead-time: around 4-6 weeks.

Stack Mold

Our stack mold tooling is designed to increase your molding output and minimize part costs, with options for both equal and varying cavity numbers in each parting surface. Lead-time: around 4-6 weeks.

Family Mold

Family molds are a type of multi-cavity mold that allows for the production of different parts with varying shapes, sizes, and features in a single molding cycle. By using a family mold, we can increase production efficiency and reduce costs, as they can produce multiple parts simultaneously with one mold.

Perfume bottle cover Tooling/Mold

Industry: Cosmetic product packing
Mold Base steel:P20
Mold Cavity Steel :1.2083(HRC48-52)
Cavity: 8 Cavities
Mold Life:1,000,000 shot
Surface Finish:Mirror Polish
Mold Feature: Double ejection

Food Container Tooling/Mold

Industry: Foods packing
Mold Base steel:P20
Mold Cavity Steel :P20,BE-CU
Cavity: 1*1
Mold Life:1,000,000 shot
Surface Finish: Standard Polish
Mold Feature: Fast cooling for molding

Controler Housing Tooling/Mold

Industry: Electronic & Electrical
Mold Base steel: 1050
Mold Cavity Steel :1.2344(HRC48-52)
Cavity: 1*1
Mold Life:500,000 shot
Surface Finish: MT-11010
Mold Feature: YUDO hot nozzle

Electrical housing Tooling/Mold

Industry: Electronic & Electrical
Mold Base steel:S50C
Mold Cavity Steel :1.2344(HRC48-52)
Cavity: 1*1
Mold Life:500,000 shot
Surface Finish: MT-11010
Mold Feature: Colored Nylong

Medical Tooling/Mold

Industry: Medical device
Mold Base steel:S50C
Mold Cavity Steel :1.2344(HRC48-52)
Cavity: 1+1
Mold Life:500,000 shot
Surface Finish: VDI-27
Mold Feature: Family mold

Medical Tooling/Mold

Industry: Medical device
Mold Base steel:P20
Mold Cavity Steel :1.2344(HRC48-52)
Cavity: 1*4
Mold Life:1,000,000 shot
Surface Finish: Mirror Polish
Mold Feature: HASCO hot nozzle

T-branch pipe Tooling/Mold

Industry: Household
Mold Base steel:P20
Mold Cavity Steel :1.2344(HRC48-52)
Cavity: 1*1
Mold Life:500,000 shot
Surface Finish: Mirror Polish
Mold Feature: Unscrewing movement

U pipe Tooling/Mold

Industry: Household
Mold Base steel:P20
Mold Cavity Steel :1.2344(HRC48-52)
Cavity: 1*1
Mold Life:500,000 shot
Surface Finish: Mirror Polish
Mold Feature: Arc slider

Oil pipe Tooling/Mold

Industry: Automobile
Mold Base steel: S50C
Mold Cavity Steel :1.2344(HRC48-52)
Cavity: 1*2
Mold Life:500,000 shot
Surface Finish: MT-11010
Mold Feature: Multiple Sliders

Automobile Tooling/Mold

Industry: Automobile
Mold Base steel:P20
Mold Cavity Steel :1.2343(HRC48-52)
Cavity: 1*1
Mold Life:500,000 shot
Surface Finish: Mirror Polish
Mold Feature: Synventive hot nozzle

Gallery of Molds

Finished Products Center

Mold Manufacturing

DFM and mold design

Injection mold design begins with a DFM program (Design for Manufacturability), presenting crucial mold design information such as dimensions, cavity layout, runner system, pouring method, parting line, ejection method, mechanical design, accessories, steel selection, and cooling design. After customer approval, detailed 3D design and NC programming are carried out, taking 3-5 days for a complete design. Complex projects may require mold flow analysis or frequent part design updates, prolonging the process.

Planning, Mold base, steel and accessories preparation

Upon mold design approval, our project manager will create a detailed project schedule covering the entire process until T1 sampling. Your assigned project manager at GPMFG will provide weekly updates. Mold base and steel can be ordered immediately after design approval, while accessories like the hot runner system may have longer lead times. It is crucial to closely monitor and track these procedures to avoid delays in subsequent steps.

Rough machine

In order to obtain the desired rough shape or cavity/core, the steel must undergo initial sizing, milling, drilling, and lathe processes. Typically, a steel thickness of 0.15-0.3 mm is retained for precision machining in subsequent stages.

Heat treatment

Heat treatment is a critical process following rough machining, as it serves two key purposes: achieving specific hardness levels and attaining internal balance. For instance, materials like 1.2343 and 1.2344 typically require hardening to a range of HRC48-52.

CNC precision machining

CNC precision machining involves meticulous attention to detail. Unlike rough machining, the CNC process operates at a slower pace with reduced cutting amounts. This method produces finely machined mold inserts with a smooth, glossy finish and accurate dimensions, achieving a maximum tolerance of 0.01-0.005mm.

Wire cut and EDM

Wire cutting is specifically used for various through holes (ejector pin holes, lifters, inserts), while EDM is suitable for features that cannot be machined by CNC due to depth or narrowness. To minimize the time and cost associated with EDM, experienced designers optimize mold design by dividing the main insert into multiple sub-inserts. This allows for direct CNC machining of the inserts, reducing the reliance on wire cutting and EDM processes.

Surface Finish and Fitting

Once all the components have been completed and prepared, our engineers gather them together and expertly assemble them according to the design drawing. This crucial task heavily relies on their vast experience and exceptional skills. In some instances, certain parts may require polishing or even reworking in order to achieve a perfect fit. Moreover, the core or cavity often have specific surface finish requirements, such as texture, polish, or engraving, which are meticulously addressed.

Mold trial

When everything is prepared, we will put the mold on the injection molding machine for a test. Make sure you clearly state your requirements, how many plastic parts you need as samples, instruct the moldmaker to use the correct resin, and that injection parameters and measurement reports should be provided with the molded plastic parts.

Mold and part inspection

Mold inspection

All of sliders or lifters can move properly
Mold cavity and core move smoothly without interference
No burrs or sharp corners on the mold base
All of cooling outlets are equipped with proper adapters
Mold core, cavity, and mold base are sprayed with rusty-protection oil
Mold information brand is firmly fastened

parts inspection

Part material is in accordance with customer’s definition
Part color is correctly made according to pantone number
All of part features are correctly and completely made
No flash, deformation, shrinkage, crack, or other obvious appearance defects
All of critical dimension and control number must be measured and qualified by SPC process.
Part assembly test with other components from the whole system
Drop test, vibration test, salt-spray, rubbing test

About GPMFG

GainPower-MFG is a top mold manufacturer in China that can produce a wide range of mold types. Within our production facility we have 27 mold making machines ranging in size from 50 tons to 1300 tons. These include CNC, EDM, wire cutting, lathe, CMM, milling, hot stamping, pad printing and screen printing units.

From insert molding and overmolding to spin-on molds, GPMFG can mass produce the molds you need for your project.

Molds suitable for presses ranging from 50 to 1300T
Up to 32-cavity molds
Molds classified from Class 101 to Class 105
Prototype molding, 2K molding, 3 shot molding, insert & overmolding
In-house tool welding
Tolerance: ±0.005mm

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OUR CERTIFICATE

Selection of Mold Steel

Component Name	Steel&Hardness	Equivalent Steel	Mold Life(Shot)	Price Index	Applications
Mold base	1050	1730	500,000	1	Plastic injection mold
	LKM P20	2311	1,000,000	1.35	Plastic injection mold
	LKM P20	2311	500,000	1.35	Die-casting mold
	H13 (HRC 44-46)	2344(HRC44-46)/SKD61	1,000,000	2.1	Plastic injection mold
Mold Cavity/Core	P20	2311/718H/2378	200,000	1	Plastic injection mold
	P20H(HB330-370)	2738H/718HH/NAK80	300,000	1.3	Plastic injection mold
	S136H(HB290-330)	2083H/420H/2316H	500,000	2.2	Plastic injection mold
	S-136 (HRC 48-52)	2083/420ESR/2316	1,000,000	3.2	Plastic injection mold
	H13 (HRC 48-52)	2344/2343/SKD61	1,000,000	3.2	Plastic injection mold
	H13 (HRC 48-52)	2344/2343/SKD61	80-150K	3.2	Die-casting mold
	8407 (HRC 50-52)	8418	150-300K	5	Die-casting mold

Mold Class & Life

Mold Class	Purpose	Shot Life	Tolerance	Cost	Lead Time
Class 105	Prototype Testing	Under 500 cycles	± 0.02mm	$	7-10 days
Class 104	Low-volume Production	Under 100.000 cycles	± 0.02mm	$$$	10-15 days
Class 103	Low-volume Production	Under 500.000 cycles	± 0.02mm	$$$$	10-15 days
Class 102	Medium-volume Production	Medium to high production	± 0.02mm	$$$$$	10-15 days
Class 101	High-volume Production	Over 1,000,000 cycles	± 0.02mm	$$$$$$	10-18 days

Free Mold Flow Analysis
Save 50-70% costs
40% reduction in delivery time
Prototype manufacturing
100% tool ownership.
Guaranteed after-sales service
Timely feedback on project progress
Project evaluation and professional advice

Jacob Deng