Daiwa Plastics Co., ltd.,
Most recent update: 2026-07-01
PR message
We are cured and thermoplastic resin molded product manufacturer.
Our offices and factories are located in Osaka, Miyazaki and Hanoi and Ho Chi Minh, Vietnam.
We specialize in manufacturing small and precise injection molded products for automobiles, heavy electronics, and electronic appliances.
The Osaka factory specializes in R&M of prototypes, mass productions, and next-generation technologies while acting as a mother factory for the Miyazaki, Ho Chi Minh, and Hanoi factory. Outside of injection molding, the factory is equipped with a rotating molder which can process up to a maximum of 900 mm.
Recently we have been working on using environmentally friendly materials (bamboo fibers and bamboo powder) and/or 100% pure paper for injection molding.
The Miyazaki factory is the mass production base mainly manufacturing critical parts for automobiles and breakers for heavy electronics using cured and thermosetting resins for injection molding.
The Ho Chi Minh factory mainly manufactures cure and thermosetting resin processing. Other than ordinary injection molding, it has the ability to blow mold and integrate manufacture for cosmetic tubes from extrusion molding too printing. It is also equipped with a clean room for manufacturing medical related, such as eye drop containers.
The Hanoi factory specializes in thermosetting resin molding and main production is auto-bike parts and large size products, such as printers. The largest molding machine in this factory is 1300t.
Feel free to contact and/or request estimate from us.
Used as a clutch part for automobiles.
Material: PA (66 nylon)
Manufacturing method: injection molding
Size: 50mm
Uses a special material (joint development between our company and a material manufacturer) that has excellent sliding characteristic and is hard to wear.
Uses a mold with a structure to achieve high roundness (geometric tolerance).
Molded at our Vietnam factory. We are exporting those parts to Japan and Thailand.
It is used as a cap for a vehicle's reserve tank and is positioned as an important safety component.
We also do assembly and pad printing.
Processing method: Injection molding (thermoplastic)
Material: PA (nylon)
An air leak test is conducted after assembly to the tank.
We mold thermosetting parts in Japan (Sakai, Miyazaki) and Vietnam (Ho Chi Minh).
Thermosetting parts have excellent heat resistance, mechanical strength, and dimensional accuracy, and are often used as metal substitutes. The photo shows the parts used in a breaker and has a very complicated shape.
[Molding material]
Phenol
Unsaturated polyester, etc.
Complex shape is also available. Please feel free to contact us.
A resin pulley with a proven track record as an automobile part.
A pulley is a component used to transmit the rotation of the engine to the belt, position the belt, and adjust the tension.
By using it as an alternative to conventional metal pulleys, it greatly contributes to weight reduction.
(Example) Made one-third the weight of conventional products lighter.
In addition, compared to metal pulleys, there is less vibration during operation and less noise.
Cost reduction effect for pulleys with complicated shapes such as grooves.
Production method
Molded by injection molding to insert the bearing. (Injection molding of resin pulleys by other companies)
[Application] Used as an intake manifold for pipes that send air to the engine and auxiliary equipment.
[Material] PF (phenol) and insert fittings
[Processing method] Injection molding
【Feature】
・The core removal structure along the angle of R80 is done using the mold mechanism.
(3-way slide core structure)
・There are 3 insert metal fittings.
・Improves dimensional stability by post-curing (annealing) after molding.
-Ensure strict hole pitch accuracy.
[Remarks]
In addition to this, we also manufacture motorcycle meter parts, muffler parts, cover parts, emblems, etc.
A multi-layer tube container that includes a barrier layer that can prevent oxidation, prevent fragrance from coming off, and prevent penetration of content components. A special tube with a 5-layer structure of polyethylene, adhesive layer, barrier layer, adhesive layer, polyethylene is extruded.
Has a track record as a container for cosmetics and face wash.
An integrated production line in Vietnam, from tube container manufacturing to exterior printing is
available.
Molding material: (LDPE) low density polyethylene, (HDPE) high density polyethylene
Tube diameter: φ35, φ40, φ45, φ50 can be manufactured.
It is a reservoir tank for power steering that uses engineering plastic resin.
Processing method: injection molding (injection)
Material: PA (nylon) 66GF (glass fiber)
・The major feature is that the two molded products on the left and right are integrated by vibration welding.
・We also perform air leak test and pressure resistance test to guarantee the function.
・Robots take out and color press-in (outsert) is done automatically.
We produce resin parts for control equipment.
It can be used for parts of various sizes.
We can also support secondary processes and assembly such as welding, metal fitting inserts, metal fitting outserts, silk printing.
[material]
PC (polycarbonate), etc.
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Thermoset resin（ Mass production / Plastic ） |
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| Company name | Daiwa Plastics Co., ltd., | Website URL | |
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| Street address |
Kitaku, Sakai Osaka Japan
[See map] |
Person in charge | yukinori kaida |
| Telephone number | +81-72-252-1024 | Fax number | Log in to display |
| Capital | 24,000,000 JPY | Employees | 30 |
| Annual sales | Unregister | EMIDAS Member Number | 83510 |
| Type of manufacturing | Heavy electric machinery / Industrial machinery / Transportation equipment | ||
| Main 3 products |
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| Primary clients |
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| Large | Medium | Small |
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| Development and production of prototype/Small-scale production | Prototype processing | Prototype/Small-lot molding Small-lot/Injection molding Simplified/Molding prototype mold |
| Mass production | Plastic | Insert molding Rotational/Slash/Dip molding General-purpose material PMMA (polymethyl methacrylate) Engineering plastic PBT (polybutylene terephthalate) PPS (polyphenylene sulfide) PI (polyimide) PEEK (polyetheretherketone) LCP (liquid crystal polymer) Thermoset resin FRP (fiber reinforced plastic) GFRP (glass fiber reinforced plastic) Elastomer Below 60 t 60 - 300 t Injection molding PES (polyethersulfone) EP (epoxy) Thin wall molding Biodegradable plastic CFRP (carbon fiber reinforced plastic) SMC) direct pressurej |
