Thermal burning temperature process flow of metal injection molding (MIM)/ceramic injection molding (CIM)

Oct 19, 2022


1、 MIM atmospheric sintering


Process flow and introduction:

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The MIM process mainly includes eight important links: product design, mold design, quality inspection, mixing, molding, degreasing, sintering, and secondary processing. Our company can customize degreasing and sintering equipment according to customer's product and process requirements, and can integrate them to provide vacuum degreasing and sintering integrated equipment.


1. Graphite thermal field vacuum degreasing sintering integrated equipment;


Suitable materials:


Iron nickel alloy, most stainless steel (17-4ph, 316L, PANACEA, etc.), die steel, high-speed steel, etc


Zhongwei Precision provides users with the following solutions for such MIM (iron nickel alloy, most stainless steel (17-4ph, 316L, PANACEA, etc.), die steel, high-speed steel, etc.):

numberVHS4415
modelVHSgr-40/40/150-1600
Effective working range (mm)four hundred × four hundred × 1500(mm)
Bearing capacity300KG
Heating power/total power240KW/280KW
Design temperature

1600℃

Operating temperature1550℃
temperature controlTwo band temperature control
High temperature homogeneity≤±3℃
Heating rate (empty furnace)15℃/min(≤1000℃);10℃/min(1000-1550℃)
Ultimate vacuumIn cold, empty and clean furnace, ≤ 2Pa
Vacuum leakage rateIn cold, empty and clean furnace, ≤ 2Pa/h
Wax collection rate≥98﹪
Cooling rate (full furnace)(Cooling water inlet temperature ≤ 30 ℃, furnace pressure 9bar)From 1450 to 100 degrees, 5-7 hours

2. Metal thermal field vacuum degreasing sintering integrated equipment;


Suitable materials


Low carbon stainless steel, titanium alloy (Ti, TC4), copper alloy, tungsten alloy, high temperature alloy (718, 713), etc


Zhonghwei Precision provides users with the following solutions for such MIM (low carbon stainless steel, titanium alloy (Ti, TC4), copper alloy, tungsten alloy, high-temperature alloy (718, 713), etc.):

numberVHS4412-M
modelVHSmo-42/45/125-1600
Effective working range (mm)420×450×1250(mm)
Bearing capacity300KG
Heating power/total power240KW/280KW
Design temperature

1600℃

Operating temperature1550℃
temperature controlTwo band temperature control
High temperature homogeneity≤±3℃
Heating rate (empty furnace)15℃/min(≤1000℃);10℃/min(1000-1550℃)
Ultimate vacuumIn cold, empty and clean furnace, ≤ 2Pa
Vacuum leakage rateIn cold, empty and clean furnace, ≤ 2Pa/h
Wax collection rate≥98﹪
Cooling rate (full furnace)(Cooling water inlet temperature ≤ 30 ℃, furnace pressure 9bar)From 1450 to 100 degrees, 8-10 hours

2、 MIM pressure sintering

Process flow and introduction


In view of the pain point of low density of vacuum sintering products, a pressure degreasing sintering integrated furnace is developed, which can improve the sintering density of products through high gas pressure at high temperature.


1. 1MPa graphite thermal field vacuum pressure degreasing sintering integrated equipment;


Suitable materials:


Tungsten carbide, titanium carbide, tantalum carbide, etc.


Zhugnwei precision 1MPa pressure degreasing sintering basic process:

numberPHS4412-1
modelPHSgr-40/40/120-1600
Effective working range (mm)400×400×1200(mm)
Bearing capacity600KG
Heating power/total power240KW/280KW
Design pressure1MPa
working pressure0.96MPa
Design temperature

1600℃

Operating temperature1550℃
temperature controlThree band temperature control
High temperature homogeneity≤±5℃
Heating rate (empty furnace)15℃/min(≤1000℃);10℃/min(1000-1550℃)
Ultimate vacuumIn cold, empty and clean furnace, ≤ 2Pa
Vacuum leakage rateIn cold, empty and clean furnace, ≤ 2Pa/h
Wax collection rate≥98﹪
Cooling rate (full furnace)(Cooling water inlet temperature ≤ 30 ℃, furnace pressure 9bar)From 1450 to 100 degrees, 6-8 hours

2. 6MPa graphite thermal field vacuum pressure degreasing sintering integrated equipment;


Suitable materials


Tungsten carbide, titanium carbide, tantalum carbide, etc.


Zhongwei Precision 6MPa Pressure Degreasing Sintering Specification:

numberPHS4412-6
modelPHSgr-40/40/120-1600
Effective working range (mm)400×400×1200(mm)
Bearing capacity600KG
Heating power/total power300KW/340KW
Design pressure6MPa
working pressure5.80MPa
Design temperature

1600℃

Operating temperature1550℃
temperature controlThree band temperature control
High temperature homogeneity≤±5℃
Heating rate (empty furnace)15℃/min(≤1000℃);10℃/min(1000-1550℃)
Ultimate vacuumIn cold, empty and clean furnace, ≤ 2Pa
Vacuum leakage rateIn cold, empty and clean furnace, ≤ 2Pa/h
Wax collection rate≥98﹪(forming agent is paraffin)
Cooling rate (full furnace)(Cooling water inlet temperature ≤ 30 ℃, furnace pressure 9bar)From 1450 to 100 degrees, 6-8 hours

3. 10MPa graphite thermal field vacuum pressure degreasing sintering integrated equipment;


Suitable materials


Tungsten carbide, titanium carbide, tantalum carbide, etc.


Zhongwei Precision 10MPa Pressure Degreasing Sintering Basic Process:

numberPHS4412-10
modelPHSgr-40/40/120-1600
Effective working range (mm)400×400×1200(mm)
Bearing capacity600KG
Heating power/total power370KW/410KW
Design pressure10MPa
working pressure9.5MPa
Design temperature

1600℃

Operating temperature1550℃
temperature controlThree band temperature control
High temperature homogeneity≤±5℃
Heating rate (empty furnace)15℃/min(≤1000℃);10℃/min(1000-1550℃)
Ultimate vacuumIn cold, empty and clean furnace, ≤ 2Pa
Vacuum leakage rateIn cold, empty and clean furnace, ≤ 2Pa/h
Wax collection rate≥98﹪(forming agent is paraffin)
Cooling rate (full furnace)(Cooling water inlet temperature ≤ 30 ℃, furnace pressure 9bar)From 1450 to 100 degrees, 5-7 hours

3、 CIM atmospheric sintering

Graphite thermal field vacuum degreasing sintering integrated equipment;


CIM process mainly includes 8 important links, including product design, mold design, quality inspection, mixing, molding, degreasing, sintering, secondary processing, etc. Our company can customize products according to customer's product and process requirements, and machine processing and subsequent processing,

numberPHS4412-10
modelPHSgr-40/40/120-1600
Effective working range (mm)400×400×1200(mm)
Bearing capacity600KG
Heating power/total power370KW/410KW
Design pressure10MPa
working pressure9.5MPa
Design temperature

1600℃

Operating temperature1550℃
temperature controlThree band temperature control
High temperature homogeneity≤±5℃
Heating rate (empty furnace)15℃/min(≤1000℃);10℃/min(1000-1550℃)
Ultimate vacuumIn cold, empty and clean furnace, ≤ 2Pa
Vacuum leakage rateIn cold, empty and clean furnace, ≤ 2Pa/h
Wax collection rate≥98﹪(forming agent is paraffin)
Cooling rate (full furnace)(Cooling water inlet temperature ≤ 30 ℃, furnace pressure 9bar)From 1450 to 100 degrees, 5-7 hours

Suitable materials


Zirconia, alumina, silicon nitride, silicon carbide, etc;


zhognweiPrecision CIM solutions are as follows:


The main features are as follows:


(1) Products with complex geometric shapes can be prepared directly and freely.


(2) The forming cycle is short, only one tenth to one hundredth of the casting and hot pressing forming time. The strength of the blank is high, which can be automated production. The management and control in the production process is also very convenient, which is suitable for mass production.


(3) Due to the good fluidity of the binder, the density of the injection molded blanks is fairly uniform.


(4) Due to the large amount of binder added in injection molding, the degreasing time is long, especially for products with large thickness, which may be as long as 100-200 hours.


(5) Because the mixture of powder and binder is very uniform, the gap between the powders is very small, and the shrinkage characteristics during sintering are basically consistent, the density of each part of the product is uniform, and the geometric dimension accuracy is high.

(6) Effective area size: 400X400X1500mm

(7) Temperature uniformity: ± 3 ℃

numberVHS4415
modelVHSgr-40/40/150-1800
Effective working range (mm)450×450×1500(mm)
Bearing capacity300KG
Heating power/total power240KW/280KW
Design temperature

1800℃

Operating temperature1750℃
temperature controlTwo band temperature control
High temperature homogeneity≤±3℃
Heating rate (empty furnace)15℃/min(≤1000℃);10℃/min(1000-1550℃)
Ultimate vacuumIn cold, empty and clean furnace, ≤ 2Pa
Vacuum leakage rateIn cold, empty and clean furnace, ≤ 2Pa/h
Wax collection rate≥98﹪
Cooling rate (full furnace)(Cooling water inlet temperature ≤ 30 ℃, furnace pressure 9bar)From 1450 to 100 degrees, 5-7 hours