Home<\/a> \u203a Factory & Capabilities<\/a> \u203a Mold Making<\/p>\n\t\t\t\t\t Mold Making \u00b7 \u00b10.01 mm \u00b7 Molds up to 1.5 m<\/p>\n\t\t\t\t\t Hongqing designs and builds injection molds in its own tool shop in Qiaotou, Dongguan, China, with Sodick EDM, Sodick wire EDM and Makino high-speed machining centers working to \u00b10.01 mm on molds up to 1.5 m. Molds are usually S136 steel rated for 500,000 shots, trials run on our own 80T\u20131300T presses, tooling takes from 30 days, and the mold belongs to you.<\/p>\n\t\t \n\t\tWe'll sign an NDA before you send drawings \u00b7 Or email info@dghongqing.com<\/strong>\n\t<\/a><\/p>\n\t\t\t\t\t Last updated: October 2026<\/p>\n\t\t \u00b10.01 mm machining<\/p>\n\t\t\t\t\t Molds up to 1.5 m<\/p>\n\t\t\t\t\t S136 steel \u00b7 500,000 shots<\/p>\n\t\t\t\t\t You own your molds<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/section>\n Tool shop specs<\/p>\n\t\t\t\t\t These figures match our factory page, and you can check each one during a factory visit or video audit.<\/p>\n\t\t\n<\/div>\n Equipment<\/p>\n\t\t\t\t\t Sodick EDM, Sodick wire EDM, Makino high-speed machining centers and more<\/p>\n\t\t\n<\/div>\n Machining accuracy<\/p>\n\t\t\t\t\t \u00b10.01 mm<\/p>\n\t\t\n<\/div>\n Mold size<\/p>\n\t\t\t\t\t Up to 1.5 m, for large housings, appliance parts and automotive components<\/p>\n\t\t\n<\/div>\n Mold features<\/p>\n\t\t\t\t\t Slides, lifters, inserts, undercuts and multi-cavity; two-shot and insert molds<\/p>\n\t\t\n<\/div>\n Steel and tool life<\/p>\n\t\t\t\t\t Usually S136 steel rated for 500,000 shots; other steels can be discussed for lower volumes<\/p>\n\t\t\n<\/div>\n Mold trials<\/p>\n\t\t\t\t\t Run on our own 80T\u20131300T presses (T1\u2013Tn), with samples shipped for your approval<\/p>\n\t\t\n<\/div>\n Lead time<\/p>\n\t\t\t\t\t Tooling from 30 days; the full schedule is given in writing after we review your 3D files<\/p>\n\t\t\n<\/div>\n Ownership<\/p>\n\t\t\t\t\t The mold is yours under the contract and can be moved out if needed<\/p>\n\t\t\n<\/div>\n Payment<\/p>\n\t\t\t\t\t Tooling starts after a 50% deposit; the remaining payment milestones are set in the contract<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n Hongqing's in-house tool shop, photographed at our Qiaotou, Dongguan plant<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n DFM review<\/p>\n\t\t\t\t\t Once we have your 3D files, Hongqing's engineers issue a DFM report that flags anything likely to cause sink, warpage, flash or ejection problems; changes are approved by you before tooling starts.<\/p>\n\t\t\n<\/div>\n 01<\/p>\n\t\t\t\t\t Wall thickness<\/p>\n\t\t\t\t\t We check for even walls and overly thick ribs and bosses to prevent sink, warpage and internal stress.<\/p>\n\t\t\n<\/div>\n 02<\/p>\n\t\t\t\t\t Ejection<\/p>\n\t\t\t\t\t We confirm draft on every face and solve undercuts with slides or lifters, or suggest design changes, so parts eject cleanly.<\/p>\n\t\t\n<\/div>\n 03<\/p>\n\t\t\t\t\t Form<\/p>\n\t\t\t\t\t We set the parting line, gates and vents so weld lines and gate marks stay off cosmetic surfaces.<\/p>\n\t\t\n<\/div>\n 04<\/p>\n\t\t\t\t\t Production<\/p>\n\t\t\t\t\t Ejector and cooling channel layout affects dimensional stability and cycle time, and therefore the part price.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n Tooling process<\/p>\n\t\t\t\t\t Tooling takes from 30 days; the full schedule is given in writing after we review your 3D files, and every milestone that needs your approval is confirmed before we move on.<\/p>\n\t\t\n<\/div>\n\t\t\t EDM area: fine details and sharp corners of each mold are machined here<\/p>\n\t\t\n<\/div>\n 1<\/p>\n\t\t We run a DFM review of your 3D files and issue a written USD quote based on part size, cavity count, steel, number of slides and lifters, surface texture, and whether the part is two-shot or overmolded.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n 2<\/p>\n\t\t Our engineers design the mold: parting, gating, ejection, cooling channels and insert layout, plus the steel and machining plan.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n 3<\/p>\n\t\t Makino high-speed machining centers cut the cavity and core, Sodick EDM machines fine details and sharp corners, and Sodick wire EDM cuts inserts and precision fits to \u00b10.01 mm.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n 4<\/p>\n\t\t The assembled mold is trialed on our own presses and T1 samples are shipped to you to approve appearance, dimensions and fit.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n 5<\/p>\n\t\t We adjust the mold and trial again (T2, T3\u2026) until the samples pass; adjustments are made in our own tool shop, so the mold never travels between factories.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n 6<\/p>\n\t\t\n<\/div>\n Once samples are approved, the mold moves into production in our molding shop, and our tool shop handles routine maintenance and repairs; the mold is yours and can be moved out if needed.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n Tool shop capability<\/p>\n\t\t\t\t\t You can see the equipment and records behind every number during a factory visit or video audit.<\/p>\n\t\t\n<\/div>\n \u00b10.01 mm<\/p>\n\t\t\t\t\t Machining accuracy (Sodick, Makino)<\/p>\n\t\t\n<\/div>\n 1.5 m<\/p>\n\t\t\t\t\t Maximum mold size<\/p>\n\t\t\n<\/div>\n 500,000 shots<\/p>\n\t\t\t\t\t Tool life with S136 steel<\/p>\n\t\t\n<\/div>\n From 30 days<\/p>\n\t\t\t\t\t Tooling lead time, with the schedule confirmed in writing<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n Mold pricing<\/p>\n\t\t\t\t\t Hongqing quotes molds per project: after reviewing your 3D files we issue a written USD quote with the DFM report attached; part prices are quoted separately.<\/p>\n\t\t\n<\/div>\n 01<\/p>\n\t\t\t\t\t Larger parts need larger mold bases and more steel, and take longer to machine; we build molds up to 1.5 m.<\/p>\n\t\t\n<\/div>\n 02<\/p>\n\t\t\t\t\t More cavities cost more up front but produce more parts per cycle and lower the part price; annual volume decides the count.<\/p>\n\t\t\n<\/div>\n 03<\/p>\n\t\t\t\t\t We usually use S136 steel rated for 500,000 shots; for lower volumes, other steels can keep tooling cost down.<\/p>\n\t\t\n<\/div>\n 04<\/p>\n\t\t\t\t\t More undercuts mean more slides and lifters, which make the mold more complex to design and machine.<\/p>\n\t\t\n<\/div>\n 05<\/p>\n\t\t\t\t\t High-gloss polish, textures and similar finishes add cavity machining and treatment cost.<\/p>\n\t\t\n<\/div>\n 06<\/p>\n\t\t\t\t\t Two-shot and insert molds are more complex and run on our two-shot and vertical presses respectively.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n Tool shop photos<\/p>\n\t\t\t\t\t These photos were taken at Hongqing's factory in Qiaotou, Dongguan; you will see the same tool shop and equipment during a factory visit or video audit.<\/p>\n\t\t\n<\/div>\n Machines mold details, narrow slots and sharp corners.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n Cuts inserts and precision fits to \u00b10.01 mm.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n Wire cutting for mold inserts and precision components.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n Machines mold cavities, cores and plates.<\/p>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n Before and after tooling<\/p>\n\t\t\t\t\t Files go from design to the tool shop, and molds go from the tool shop to the molding floor, all inside our plant; trials and adjustments never require shipping the mold between factories.<\/p>\n\t\t\n<\/div>\n 90+ presses from 80T to 1300T; mold trials and production both run in our own factory.<\/p>\n\t\t\t\t\t\n\tExplore injection molding \u2192\n<\/a>\n\t\t\n<\/div>\n\n<\/div>\n Verify appearance, dimensions and fit with 3D-printed or CNC prototypes before tooling; prototypes from 10 days.<\/p>\n\t\t\t\t\t\n\tPrototyping \u2192\n<\/a>\n\t\t\n<\/div>\n\n<\/div>\n Mechanical design follows molding rules from the start, so fewer changes are needed after tooling.<\/p>\n\t\t\t\t\t\n\tSee design and engineering \u2192\n<\/a>\n\t\t\n<\/div>\n\n<\/div>\n A 20-person QC team inspecting at four gates: incoming, first article, in-process and outgoing.<\/p>\n\t\t\t\t\t\n\tExplore quality control \u2192\n<\/a>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\nInjection Mold Making in China: In-House Tool Shop, \u00b10.01 mm, Molds up to 1.5 m<\/h1>\n\t\t\t\t\t
Mold making at a glance<\/h2>\n\t\t\t\t\t
![\"Hongqing's](\"https:\/\/www.dghongqing.com\/wp-content\/uploads\/2026\/06\/\u6a21\u623f-1024x537.webp\")
\t\t\t\t\tFix problems in the design before cutting steel<\/h2>\n\t\t\t\t\t
Wall thickness and sink<\/h3>\n\t\t\t\t\t
Draft and undercuts<\/h3>\n\t\t\t\t\t
Parting line and gates<\/h3>\n\t\t\t\t\t
Ejection and cooling<\/h3>\n\t\t\t\t\t
From DFM to production: 6 milestones of mold making<\/h2>\n\t\t\t\t\t
![\"Sodick](\"https:\/\/www.dghongqing.com\/wp-content\/uploads\/2026\/06\/\u706b\u82b1\u673a2-1024x576.webp\")
\t\t\t\t\tDFM review and quote<\/h3>\n\t\t\t\t\t
Mold design<\/h3>\n\t\t\t\t\t
Precision machining<\/h3>\n\t\t\t\t\t
Assembly and T1 trial<\/h3>\n\t\t\t\t\t
Mold adjustment and sample approval<\/h3>\n\t\t\t\t\t
Production and maintenance<\/h3>\n\t\t\t\t\t
4 key numbers from our tool shop<\/h2>\n\t\t\t\t\t
6 factors that drive injection mold cost<\/h2>\n\t\t\t\t\t
Part size<\/h3>\n\t\t\t\t\t
Cavity count<\/h3>\n\t\t\t\t\t
Steel grade<\/h3>\n\t\t\t\t\t
Slides and lifters<\/h3>\n\t\t\t\t\t
Surface texture<\/h3>\n\t\t\t\t\t
Two-shot or overmolding<\/h3>\n\t\t\t\t\t
Inside our tool shop<\/h2>\n\t\t\t\t\t
![\"Sodick](\"https:\/\/www.dghongqing.com\/wp-content\/uploads\/2026\/06\/\u706b\u82b1\u673a-768x685.webp\")
\t\tSodick EDM<\/h3>\n\t\t\t\t\t
![\"Sodick](\"https:\/\/www.dghongqing.com\/wp-content\/uploads\/2026\/06\/\u6162\u8d70\u4e1d-768x520.webp\")
\t\tSodick wire EDM<\/h3>\n\t\t\t\t\t
![\"Sodick](\"https:\/\/www.dghongqing.com\/wp-content\/uploads\/2026\/06\/\u6162\u8d70\u4e1d2-768x432.webp\")
\t\tWire EDM area<\/h3>\n\t\t\t\t\t
![\"CNC](\"https:\/\/www.dghongqing.com\/wp-content\/uploads\/2026\/06\/cnc-768x432.webp\")
\t\tCNC machining center<\/h3>\n\t\t\t\t\t
Design, prototyping, molding and QC on the same site as the tool shop<\/h2>\n\t\t\t\t\t
![\"Hongqing](\"https:\/\/www.dghongqing.com\/wp-content\/uploads\/2026\/06\/\u5c0f\u8f66\u95f4-768x432.webp\")
\t\tInjection Molding<\/h3>\n\t\t\t\t\t
![\"Hongqing](\"https:\/\/www.dghongqing.com\/wp-content\/uploads\/2026\/06\/\u4ea7\u54c1\u8ba8\u8bba-768x576.webp\")
\t\tPrototyping<\/h3>\n\t\t\t\t\t
![\"Structural](\"https:\/\/www.dghongqing.com\/wp-content\/uploads\/2026\/06\/\u7ed3\u6784\u8bbe\u8ba1-768x576.webp\")
\t\tProduct Design & Engineering<\/h3>\n\t\t\t\t\t
![\"QC](\"https:\/\/www.dghongqing.com\/wp-content\/uploads\/2026\/06\/\u54c1\u8d28\u623f-768x432.webp\")
\t\tQuality Control<\/h3>\n\t\t\t\t\t