Single Injection Molding

Precision Single Injection Molding

YOMURA produces precision single-shot injection-molded plastic parts with consistent quality and tight tolerances. Our presses range from 30 to 2,000 tons of clamping force, covering small precision parts through large housings, in both high-volume runs and low-volume, high-mix production. Material selection is guided by our polymer scientist, Dr. Simon Lai (PhD), who helps customers choose the right resin for each application, from development through mass production.

Material Flexibility & Characteristics

TPR

Offers flexibility and a soft touch, ideal for various applications.

ABS

Combines the advantages of plastic and rubber for superior performance.

PC

Known for its exceptional heat resistance and impact strength.

Drone-Grade Composite Materials

We process carbon fiber reinforced polymers (CFRP), glass fiber reinforced polymers (GFRP), PAHT CF15 (polyamide high-temperature carbon-filled), PLA GF20, and PP GF30 — engineered composites proven in UAV airframe, fuselage, and landing gear structures

PPS (Polyphenylene Sulfide) + GF

High-temperature resistant thermoplastic with superior chemical resistance and dimensional stability. Ideal for IC Carrier & Socket Connectors requiring ultra-tight tolerances.

ULTEM™ (PEI — Polyetherimide)

Amorphous high-performance plastic with outstanding heat resistance (Tg 217°C), inherent flame retardancy, and exceptional mechanical strength. Used in precision IC carriers and socket connectors.

PBT (Polybutylene Terephthalate) + GF

Semi-crystalline engineering plastic with excellent electrical insulation and flow characteristics for thin-wall precision molding. Used in connector housings and socket bodies.

Reinforced Single Injection Molding

CFRP & GFRP for Robot Lightweighting

Utilizing Carbon Fiber (CFRP) and Glass Fiber (GFRP) reinforced composites to manufacture high-rigidity robot structural components. These materials significantly reduce robot body weight, increasing operating speed and energy efficiency while maintaining metal-like strength.

Nylon

Engineered resins for products with superior mechanical properties.

High-Performance Functional Parts

Production of friction-optimized plastic gears and links that offer self-lubricating properties, ideal for maintenance-free robot joints.

CFRP & GFRP for UAV Structural Lightweighting

Utilizing short carbon fiber and chopped fiberglass reinforced injection molding to produce drone fuselage shells, landing gear brackets, and motor mount housings. ABS-based composites injection molded for quadcopter fuselage parts deliver metal-like rigidity at a fraction of the weight.

Applications & Industries

Robotics & Automation

Manufacturing lightweight structural chassis, links, and protective housings for industrial and service robots, shifting from simple appearance parts to load-bearing functional components.

Medical

Meeting the demanding requirements of the medical sector.

Automotive & Mobility

Providing lightweight solutions for autonomous vehicles and mobility robots.

Drone & UAV Manufacturing

Production of lightweight UAV airframe components, protective canopies, propeller guards, and structural housings using fiber-reinforced composite injection molding. Materials include CFRP, GFRP, PET CF15, PAHT CF15, and nylon composites — supporting both commercial and industrial unmanned aerial vehicle programs.

Semiconductor IC Carrier & Socket Connector

Precision molding of high-performance engineering plastic components for IC Carrier, and power module socket connectors used in semiconductor related industries. We replace traditional metal with advanced GF-reinforced engineering plastics (PPS, ULTEM, PBT+GF) for superior dimensional stability, weight reduction, and cost efficiency — with ±0.01 mm tolerance capability on critical contact alignment features.

IC Carrier & Socket Connector — One-Stop Shopping Service

From design to delivery, Yomura provides a fully integrated manufacturing solution for semiconductor IC Carrier & Socket Connector components — eliminating multi-vendor complexity and ensuring consistent quality at every stage.

Our Integrated Process:

01

Joint Design & Engineering (JDM/ODM)

Co-develop socket designs with DFM analysis and material selection consultation.

02

Precision Mold Fabrication

In-house CNC/EDM tooling with EROWA automation for fine-pitch IC socket mold geometries.

03

Metal Contact Stamping & Plating

Stamped copper contacts (CDA 101/102, C1020, C1100) with Ni/Au plating to spec.

04

Precision Single Injection Molding

PPS, ULTEM, PBT+GF, PA66+GF molded at ±0.01 mm tolerances with optimized crystallinity control.

05

Insert Molding & Sub-Assembly

Metal contacts integrated into plastic housings via automated insert molding.

06

Quality Inspection & Global Delivery

100% dimensional inspection, full material traceability, and worldwide logistics support.

Materials of IC Carrier & Socket Connector

Semiconductor-Grade Engineering Plastics

Material	Variant	Key Properties
PA66+GF	Standard Grade	High strength & stiffness; GF reinforced
PBT	Virgin (natural)	Good electrical insulation; thin-wall flow
PBT+GF	Black	Enhanced rigidity & heat resistance
PBT+GF	Natural (white)	Same mechanical properties; light color option
PPS	GF+MD Reinforced (sandblasted)	Superior chemical/thermal resistance; high dimensional accuracy
PPS	Standard (sandblasted)	High dimensional accuracy post surface treatment
PPS+GF	GF Reinforced Grade	Outstanding creep resistance; UL94 V-0; balanced flow & strength
ULTEM (PEI)	Unfilled Grade	Tg 217°C; inherent flame retardancy
ULTEM (PEI)+GF	GF Reinforced Grade (black)	High strength at elevated temps

Metal Contacts for Insert Molding

Material	Specification	Surface Treatment
Copper 101/102	5 mil, half hard	—
CDA 102 Copper	5 mil, half hard	50–150 μin Ni / 10–20 μin Au plating
CDA 102/101 Copper	5 mil, half hard	—
C1020 Oxygen-Free Copper	2.5 mm thickness	—
C1100 Copper	0.5 mm thickness	Ni + Au plating
Cu-a1 / C1100	1.0 mm thickness	Au plating

Drone Propeller — Contract Manufacturing & Engineering Services

Yomura operates as a dedicated OEM/ODM partner for drone propeller production, providing comprehensive engineering support to transition designs from concept to qualified serial production. We specialize in Material Consultation, utilizing an engineering-plastic platform of long-chain PA66 with high-ratio long fiber reinforcement. This composite achieves a specific gravity below 1.0, delivering a lightweight state that extends flight time while maintaining the stiffness and impact tolerance required for high-cycle rotating applications.

Our Design for Manufacturability (DFM) process incorporates advanced Moldflow analysis to optimize fiber orientation, gate placement, and weld-line management, ensuring dimensional stability across the blade twist before tooling begins. To finalize the production cycle, we conduct Physical Flow-Velocity Testing to validate that the as-built aerodynamic profile matches the design intent, providing objective evidence for first-article acceptance and ensuring the realities of injection molding align with the customer’s aerodynamic specifications.

Long-fibre reinforced PA66 propeller blades -- root-to-tip view showing mounting interface and aerodynamic twist.

Unwavering Quality Standards

Yomura's role is strictly that of a contract manufacturer. The propeller geometry, aerodynamic profile, and performance specification belong to the customer; our contribution is the material, mold, process, and validation expertise required to convert that specification into a manufacturable, repeatable, and flight-qualified part. This clear division of responsibility is what allows drone OEMs and tier-one integrators to partner with Yomura without any concern over design ownership.

Finished propeller pair with protective leading-edge treatments -- representative of production-grade UAV blades

Continuous Improvement & Innovation

01

Investing in Technologies

Staying at the forefront of innovation with the latest technologies.

02

Material Advancements

Exploring advanced drone composite materials — including carbon/epoxy (T300/934, IM7/8551-7), glass/epoxy (E-glass), and Carbon/PEEK (IM7/APC-2) systems with tensile strengths up to 419 ksi — to push the boundaries of UAV structural performance and lightweight design.