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Product Introduction

  We, Yamada Seisakusho Co., Ltd., have earned the trust of many customers as a leading company in non-metallic resin presses due to the uniqueness of our field.The products are mainly used for automotive electrical parts and electronic equipment parts.
  We can handle everything from small-scale production such as prototypes to large-scale lot production, and from thin films to thick laminates.In addition, we also manufacture molds in-house, so we can flexibly respond to customer requests in terms of delivery and cost.
  We are willing to take on the challenge of processing materials that we have never processed before, so if you have any problems with processing non-metallic materials, please do not hesitate to contact us.
  The main materials used are paper phenolic resin laminates, cloth phenolic resin laminates, glass phenolic resin laminates, glass epoxy resin laminates, pressboards, and other films such as PP and PET.
  For detailed product shape, please refer to the product photo.

Auto parts

Pressed products of insulators for motors

This is a pressed insulator used for small to medium-sized motors in automobiles.
The material is a glass phenolic resin laminate (Bakelite) composed of glass fiber and resin.
・Since it is an insulator, processing oil cannot be used.
・Dust containing glass fiber is generated (Since quartz is not contained, there is no effect on the human body.)
・Processing oil cannot be used, and since it contains glass fibers, equipment and molds wear out quickly.
・Phenolic resin and glass fibers are not compatible with each other, and delamination (peeling) easily occurs during punching.
There is poor workability such as.
Based on our many years of unique technology, we can determine the wear resistance and maintenance cycle of molds and equipment, and deliver products that require strict accuracy with stable quality.

Pressed products of insulators for motors

This is a press processed product of insulators used for automobile motors.
The material is a special hard fiber board composed of environmentally friendly natural materials with wood fiber as the main raw material.
・Since it is an insulator, processing oil cannot be used.
・Composed of high-density wood fiber, equipment and molds wear quickly due to paper dust, etc.
・Interlayer delamination (peeling) is likely to occur during punching.
There is poor workability such as.
Based on our many years of unique technology, we can determine the wear resistance and maintenance cycle of molds and equipment, and deliver products that require strict accuracy with stable quality.

Pressed products of insulators for motors

This is a pressed insulator used in automobile motors.
A paper phenolic resin laminate (Bakelite) composed of paper fiber and resin as a base material,
・Since it is an insulator, processing oil cannot be used.
・Resin dust containing fibers is generated.
・Phenolic resin and paper fibers are not compatible with each other, and delamination (peeling) easily occurs during punching.
・Cracks will occur if press working is not performed in a high temperature state.
・On the other hand, if the temperature is too high, the removal performance will be deteriorated, such as the hole residue of the waste being stuck.
There is poor workability such as.
Based on our many years of unique technology, we can determine the wear resistance and maintenance cycle of molds and equipment, and also keep the heating temperature constant with dedicated equipment, making it possible to deliver products with strict quality requirements.

Pressed products of insulators for motors

for automobile motorsbrush holder It is a press processed product of insulator used for
The material is a glass phenolic resin laminate (Bakelite) composed of glass fiber and resin.
・Since it is an insulator, processing oil cannot be used.
・Dust containing glass fiber is generated (Since quartz is not contained, there is no effect on the human body.)
・Processing oil cannot be used, and since it contains glass fibers, equipment and molds wear out quickly.
・Phenolic resin and glass fibers are not compatible with each other, and delamination (peeling) easily occurs during punching.
There is poor workability such as.
Based on our many years of unique technology, we can determine the wear resistance and maintenance cycle of molds and equipment, and deliver products that require strict accuracy with stable quality.

Pressed products of nylon material for small motors

This is a pressed nylon material used in small motors for automobiles.

It is often used in areas where requirements such as coaxiality and dimensional accuracy are often strict, and it is a difficult-to-process material that is very prone to burrs during punching.

At our company, we use our own precision molds and high-speed press machines with special specifications that are made up of our unique know-how to enable processing that minimizes burrs.

Pressed products of waterproof packing for small motors

Waterproof packing used for automobile wiper motors.
It is possible to punch a wide range of materials such as oil sheets containing oil and synthetic cork materials made of cork.

Since it is a relatively soft material, it can be processed not only by punching with Thomson and Vic dies, but also with press dies designed by our company.
Our strength is that we can choose between Thomson type and Vic type for prototypes and small lots, and molds for large lots of 1 pieces or more per month.

In addition, it is also possible to laminate a strong adhesive double-sided tape for bonding on the back side for easy assembly, and then punch it out.

Bent products of insulators for motor slots

This is a slot insulator used for motors for automobiles and electrical machinery.
This insulator is used for insulation and heat resistance in the slots (grooves) of motors.

Materials composed of aramid fiber or polyimide film are often used, but require bending for insertion into the slot. (This photo shows aramid fiber)

At our company, there are two types of construction methods: bending with ruled lines (streaks) applied to the material using the Thomson type and Viku type, and automatic bending using a bending die.
We can handle a wide range of requests from prototypes, small lots to large lots.

Insulation cover pressed products / products with double-sided tape for bonding

Insulating covers for converters used in automobiles, especially HV (hybrid), PHV (plug-in hybrid) and EV (electric vehicles).
We can provide various materials, but PET (polyethylene terephthalate) film, which is inexpensive and easy to process, is often used.

In general, Thomson type, Vic type, and etching blade type are used for processing, but accuracy requirements are often severe, and it is impossible to meet the requirements other than etching blade type, and etching blade type has poor productivity. There is a problem.
At our company, we use press dies designed in-house to achieve high productivity with automated machines and an increase in the number of products that can be obtained from materials.

In addition, we attach strong adhesive double-sided tape for bonding for assembly, but we can also process it in-house, and we have also built an inspection machine to prevent mistakes in attaching it, and at the same time we have achieved quality improvement. We are here.

Motor cover

Confected with polypropylene filmWith car motorIt is a lightweight cover to prevent foreign matter mixed.
We process the hole in the bent part and the central hole at the same time, but depending on the shape, it is possible to process using a mold.
In addition, a wide range of prototypes, small lots to large lots can be handled.

Bent products of insulators for motor slots

This is a slot insulator used for motors for automobiles and electrical machinery.
This insulator is used for insulation and heat resistance in the slots (grooves) of motors.

Materials composed of aramid fiber or polyimide film are often used, but require bending for insertion into the slot. (This photo is a polyimide film)

At our company, there are two types of construction methods: bending with ruled lines (streaks) applied to the material using the Thomson type and Viku type, and automatic bending using a bending die.
We can handle a wide range of requests from prototypes, small lots to large lots.
 
 
Half-cut product (the finished product will be rolled)

Pressed product of rubber cover for wire harness

A rubber cover for wire harnesses used for heat dissipation.
At our company, this shape is made by punching using a mold.
Rubber stamping is generally done with Thomson and Vic dies, but we use press dies to pursue precision and efficiency.


Pressed products of insulators for horns

This is a processed product of phenolic resin laminate (Bakelite), which is used for horns and uses fine fabric fibers as the base material.
Quality requirements are high, requiring accuracy on the order of 100 minutes, and the quantity is several hundred thousand pieces, but the molds developed by our company can be delivered with stable quality.

PEEK material pressed products for small motors

Used in automotive power seat motors, etc.It is a press processed product of PEEK material (polyether ether ketone), which is a super engineering plastic material.
It has excellent flame resistance, friction resistance, and abrasion resistance, and is mainly used as a lightweight material for sliding parts.
In recent years, it has attracted attention as a substitute for bearings.

Although it is an expensive material and is prone to burrs during punching, we process it with a design concept that maximizes the number of pieces that can be processed from the size of the original fabric.
We have a track record of 20 to 30% improvement in the number of products compared to other companies, which contributes to cost reduction.
In addition, it is also possible to reduce burrs to the limit by processing with high-precision molds.

Electrical and electronic components

Glass epoxy resin pressed products for inverter motors

Glass-epoxy resin laminate used in inverter motorsis a pressed product.
glass epoxy resin laminateEpoxy resin is impregnated into glass fiber, heat-cured, and shaped into a plate.
This material is an insulator that is often used in printed circuit boards, and is usually processed by cutting, etc., but it is difficult to handle large lots.
Also, the dust generated during cutting contains glass fibers, which significantly shortens the life of cutting tools.

At our company, we use in-house molds for high-precision processing to suppress the generation of processing dust, and we have built a production line that can handle multiple lots and has cost advantages.

Pressed product of insulator for brush holder

This is a processed product of phenolic resin laminated plate (Bakelite), which is used as a base for brush holders (holders that support carbon brushes).

Using the molds developed by us, we are able to perform processing with the precision required by our customers.
Due to the characteristics of the material, it cracks when processed at room temperature, so it is necessary to process at an appropriate temperature.



Press processed products of cellulose nanofiber paper

It is a pressed product of cellulose nanofiber material (commonly known as fiber), which is chemically treated paper as a raw material.

Fiber is a type of industrial paper that is strong, tenacious and hard to break, and has a certain degree of rigidity.
It is an environmentally friendly material that can be surface-treated, can be painted and glued, and decomposes faster than ordinary paper.

Due to its excellent rigidity, toughness, compression resistance, abrasion resistance, heat insulation, electrical insulation, etc., it is used for insulating parts of electrical equipment, various packings, machine parts, etc.

Since it is made of paper, the cross section becomes rough when cut, and the Thomson type and Viku type cannot be inserted due to their toughness.
At our company, we are able to overcome these issues by using molds that we have developed in-house, enabling high-precision, high-speed processing.

Pressed product of mica

It is a pressed product made of mica, which is a natural ore, and has excellent electrical insulation and heat resistance.
This mica is a difficult material to handle due to the following points.
・Because it is laminated, delamination (peeling) occurs due to impact during punching.
・Various changes due to the environment (e.g., exposed to the outside air for a long time ・Delamination is more likely to occur due to humidity)
・Fragile and easily broken

We have a track record of processing plates with a thickness of 1.5 mm, and we can also handle plates with a thickness greater than that depending on the shape.Please feel free to contact us for details.

construction machinery parts

Packing pressed product

Oil packing used for forklift transmissions.
The processing material has excellent oil resistance and sealing properties and is composed of nitrile rubber, butadiene rubber and reinforced cellulose fibres.
It also has short-term heat resistance up to 180°C (350°F).
At our company, processing involves punching these rubber-based materials with high precision and at high speed.

In addition, it is difficult to procure and purchase imported materials, but we can procure such special materials.

Packing pressed product

Oil packing used for forklift transmissions.
The processing material has excellent oil resistance and sealing properties and is composed of nitrile rubber, butadiene rubber and reinforced cellulose fibres.
It also has short-term heat resistance up to 180°C (350°F).
At our company, processing involves punching these rubber-based materials with high precision and at high speed.

In addition, it is difficult to procure and purchase imported materials, but we can procure such special materials.

industrial equipment parts

Housing equipment

Processed products of insulating sheets for delivery boxes

Processed product of insulation film for home delivery boxes.

This is a product born from the solution of the customer's problem.
After listening to the customer's problems and creating samples, we proposed materials and created drawings, processed products, and delivered them.

In response to the need to reduce the battery consumption of delivery boxes, it is possible to dig deeper and propose the shape of the battery box so that it is easy to install on site.

Pressed product of flush sensor for urinals

Pressed film used for faucet sensors in men's urinals.

Since the material is thin and the inner diameter has a shape, it is a product that requires attention to damage such as damage to the die punch during processing.
With our processing technology, it is possible to suppress defects to almost zero.

Aerospace

CFRTP (carbon fiber) pressed products

Lightweight, fatigue-resistant, heat-resistant, and flame-retardant in the aerospace industry
・It is used as a material that excels in LCA (Life Cycle Assessment).
It is a promising material with strong strength and heat resistance, but on the other hand, it is a difficult-to-process material that is not suitable for punching because it is weak in toughness and hard.

However, at our company, we have achieved both precision and productivity by using molds developed in-house and unique processing methods that do not damage the materials.

Others

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