株式会社 山本製作所

 

 

Business Offerings

manufacture and sale
of various producs

(High-density,
multi layer
Printed Circuit Boards)

・Computers, Large-
network servers/routers

・IC testers and
communications/
base stations

・Optical communications
/traffic systems and
building system

(Watch accessories)
・Watch dial plates
and cases

(Metalworking)
・Precision parts,dies
and industrial producs

(Processing of parts)
surface treatment /
plating, electrocasting
and manufacture /
sales of processed
parts

 

HOME»  ・Watch Dial Division»  ・Watch Dial manufacturing Technologies

Watch Dial Manufacuturing Technorogies

Overview of Processing Technologies / Inquiry

Yamamoto Mfg.was established in 1945 as a manufacturer of Watch Dials.

Over our 70-year history we've developed a range of processing technologies not only for the manufacture of dial plates but also to help our customers create products that exhibit esthetic beauty and delicacy. We're proud to showcase our technologies below. If you're interested in any of our processing technologies, please feel free to get in touch.

 

Click here to contact us.

 

Overview of Dial-plate Manufacturing Technologies

A Leading Company with the Largest Share in Japan

 

Today, as consumer needs become increasingly diverse, the watch category is becoming more segmented. There are various types of watches now available, from simple ones used only to keep time to those that are more fashionable and unique in design and movement, thus symbolizing the status of the people who wear them. For more than half a century since its founding in 1945, Yamamoto Manufacturing has produced watch dials. Our experience has made us one of the industry's leading companies worldwide, and we boast the largest share in Japan. Dial manufacturing encompasses a number of processes, including the stamping of formed plastic sheets, the spot-welding of feet that stop the movement (applicable only to metal dial plates), finish polishing, plating, coating, printing, placement of time symbols, etc. Among these, the printing process is considered the most difficult. We have developed a unique printing system to meet Japan's needs for high quality. Indeed, this groundbreaking system was instrumental in the dramatic growth of our market share. In recent years, watches have featured dial plates offering greater added value. We can help you create luxury dial plates by combining our original electrocasting technology with composite metal/plastic patterns, three-dimensional designs and distinctive materials such as lacquer and pearl oyster shell.

 

Printing Technorogy

We can create detailed printing patterns through pad printing.
We also have screen-printing capabilities with which to express a wide range of colors.

 

Plating/Coating Technology

Combination of decorative plating and coating opens the door to limitless variatons of colorful expressions.
 

 

Plating line
Plating line

 

Clean-room coating chember
Clean-room coating chamber

 (class 10000)

   

 

Electre-casting Technology

Electro-casting is a technology whereby metal ions present between the electrodes are electrodeposited onto the surface of a die, after which the surface shape of the die is faithfully transferred with metal surface roughness of sub-μm level. With the help of our electro-casting technology, we can process not only watch dials but also various metals such as gold, silver, nickel and rhodium, to the desired textures.
 

 

3D CAD・CAM
3D CAD・CAM

 

Macining center
Macining center

 

Copper electro-casting plating bath
Copper electro-casting plating bath

 

electro-casting

 

electro-casting

 

electro-casting

Mirror surface finishing requires the flattening and polishing of the tips of hardwood

to a thicknessof 0.5 to 1.0mm,where different abrasive compounds of varying 

particle sizes are applied in stages to achieve the desired polishing.

The processes sometimes take 10+hours.
 

 

The electrocasting of dies mainly

involves machining, but not everything

can be done by machines. For example,

the deburring of machined dies and

mirror surface finishing of curved surfaces must be done by hand, and this

manual work requires concentration

and patience.

For such processes we have experts

with many years' experience and keen

sensitivity.

The level at which these tasks are

completed has a direct bearing on

product quality.

 

Fine-cutting Technology

Multifaceted cutting using a single-crystal diamond bit created a striking MR finish of excellent quality.

You can also combine hairlining,horning,etc.,to add to an appealing accent.