Foundry Sector


The foundry sector of Joban Seisakusho boasts a history since 1945, and has enriched its contents as the times have changed. Currently, we are melting and casting various products of gray cast iron (FC250 / 300) and ductile cast iron (FCD400 / 450/500/600). For molding, we have an automatic molding line and a furan self-hardening hand-made molding line, and we can produce heavy products up to 10 to 700 kg. The production capacity will be about 400t / month. The main uses of the product are automobile parts, construction machinery parts, hydraulic parts, etc.

Equipment of Foundry Sector

FacilityName and CapacityQuantity
MeltingHigh frequency electric furnace1.5t/B2 furnaces
(includes Sand processing)
AMS-08 Machine molding line800 x 850 x 350 / 350
1 line
Furan bench molding line20t/month1 line
Core making system 2 sets
MachiningOverhead shot blast0.5t x 1set,2t x 1sets3 blasts
Drum-type shot blast1t/B2 blasts
Compressor75kW3 compressors
Annealing furnace20t/B1 furnace
Shot blast machine 3 blasts

AMS-08 Machine molding line

AMS-08 Machine molding line ​

Furan bench molding line​

Furan bench molding line​

Foundry Product Samples


Product name:
Motor body

Material: FC300
Weight: 177kg


Product name:
Carrier B

Material: FCD450
Weight: 28.5kg


Product name:

Material: FC250
Weight: 50kg


Product name:

Material: FCD450
Weight: 560kg

Machining Sector


In 1938, one year after the foundry sector, the machinery plant of Joban Machinery Co., Ltd started running. The machinery plant has been operated broad production from the precision work for small parts to large parts for construction machines, and now the plant created the integrated manufacturing system including the assembly of hydraulic motors using our existing strength that we can make foundry materials on its own. Our hydraulic motor is used worldwide under the brand name of KYB Co., Ltd and is highly trusted. Of course, we are good at handling single parts.

Breakdown of Facilities in Machining Process Sector

Facility No.FacilityQuantity
1Vertical Machining Center5 machines
2Horizontal Machining Center14 machines
3NC lathe16 machines
4Lathe3 machines
5Milling Machine2 machines
6Honing Machine2 machines
7Hobbing Machine2 machines
8Drilling Machine5 machines
9Polishing machine7 machines
10Others33 machines
 Total:89 machines

Vertical Machining Center

NC lathe

Horizontal Machining Center

NC cylindrical grinder

NC inner width grinder

Automatic buffing machine​

Machined products


Product name:
Motor body


Product name: Crankshaft


Product name:


Product name:
Connecting rod

Quality-related Equipment

Coordinate Measuring Machine1
Roundness cylindrical shape measuring machine1
Surface Roughness Tester1
Contour Measuring1
Optical Emission Spectrometer1
Ultrasonic Flaw Detector1
Amsler Universal Testing Machine1
Charpy Impact Tester1
Various Types of Hardness Scales6
Various Types of Sand Testers7