Direct Clamping and Platen Rigidity
Hydraulic cylinders apply clamping force directly to the platen, creating a short force-transmission path and even load distribution. This design supports flash control and can reduce downstream trimming work.
TaipeiPLAS 2026
September 15–19, 2026
Taipei Nangang Exhibition Center, Hall 1
Visit Official Show Website
JING DAY MACHINERY · JD-RH SERIES
JD-RH Direct Clamping Rubber Injection Molding Machine
Precision Injection. Consistent Performance.
JING DAY's JD-RH Series is designed for injection molding of natural, synthetic, oil-resistant, heat-resistant and reclaimed rubber. Its direct clamping structure, temperature-controlled material charging and specialized anti-overflow nozzle support flash control, stable material temperature and consistent molding quality across rubber compounds of different hardness and formulation.
Manufacturer: JING DAY MACHINERY INDUSTRIAL CO., LTD. | TaipeiPLAS 2026 Co-exhibition Page
Key Design Features of the JD-RH SeriesWhy JD-RH Series
Selecting a rubber injection molding machine involves more than clamping tonnage. Platen rigidity, working height, material temperature control and anti-overflow feeding design can all affect flash control, material-temperature stability and day-to-day operating efficiency.
Low-bed Structure
The low-bed design reduces the machine working height, making material loading and part removal easier for operators without requiring excessive reaching or bending.
Stable Material Temperature to Prevent Premature Vulcanization
Automatic temperature control keeps the rubber material in the charging barrel at a stable temperature before injection. Unlike thermoplastics, rubber compounds must be managed carefully to prevent premature crosslinking or vulcanization inside the material path.
Specialized Feeding and Anti-overflow Nozzle Design
A specialized feeding device and anti-overflow nozzle design help reduce material loss and cleanup work, making per-shot material usage easier to control.
Ten Core Systems of the JD-RH SeriesCore Systems
From HMI operation, injection and material charging control to hydraulic clamping and mold-handling devices, these core systems support stable JD-RH operation in continuous production.
HMI, Injection and Material Control
- Human Machine InterfacePLC and HMI control are standard equipment. Production parameters can be stored and quickly recalled, reducing setup time during product or compound changeovers.
- Injection SystemThree-stage pressure and four-stage speed control, with injection position feedback by potentiometer, make it easy to match injection settings to rubber compounds of different hardness and formulation.
- Charging UnitAutomatic temperature control maintains stable rubber temperature in the charging barrel before injection, helping prevent premature vulcanization.
Hydraulic and Clamping Systems
- Integrated Hydraulic CircuitThe hydraulic circuit is integrated into the machine body and uses proportional flow and pressure control valves, delivering responsive operation and high productivity.
- Auxiliary Double CylinderA high-speed mold opening and closing design that significantly reduces molding cycle time and increases output.
- Temperature Control DevicePLC computation with SSR control keeps the feed barrel and charging barrel at a stable temperature, preventing the rubber compound from vulcanizing inside the barrel.
- REER Safety Light CurtainA REER safety light curtain monitors the operating area to help protect operators and equipment.
Mold Handling Devices
- Outside EjectorThis optional device separates the mold plates on three-layer and larger molds so finished parts can be removed more easily. Automatic part ejection and mold-plate flipping are available as options.
- Core EjectorDesigned for multi-layer molds, this device holds the middle or upper mold plate in position during operation.
- Lower Platen Sliding DeviceThis optional device makes material loading and finished-part removal easier for the operator. The slide rails are hardness-treated for longer service life.
Standard and optional equipment varies by model. Please visit our booth or send us your requirements to request detailed configuration information.
Application Areas to EvaluateApplications
From medical sealing components and automotive seals to customized industrial rubber parts, the JD-RH Series serves volume-production needs across a wide range of rubber products. The following five categories are a practical starting point.
Medical Rubber Components
Medical seals, silicone components, syringe stoppers, and precision medical rubber parts.
Automotive Rubber Components
O-rings, oil seals, gaskets, bushings, and automotive sealing components.
Motorcycle Rubber Components
Dust boots, bushings, shock absorber parts, and motorcycle rubber components.
Electrical Rubber Components
Cable grommets, insulating sleeves, wire seals, and waterproof rubber components.
Industrial Rubber Products
Custom-molded seals, gaskets, industrial rubber parts, and specialty applications.
Not sure whether your product is suitable? Bring a product drawing or sample to the booth and the JING DAY team can help evaluate the machine model and production-line configuration. You may also submit your requirements online in advance.
7 Items to Prepare Before Machine Selection or InquirySelection Checklist
The more complete your information, the easier it is to evaluate the required clamping force, shot-volume configuration, platen size and auxiliary equipment. Click each item to track what you have prepared.
- Product Drawing or SampleProduct dimensions, appearance and precision requirements
- Rubber Type and HardnessNatural, synthetic, oil-resistant, heat-resistant or reclaimed rubber, including compound hardness
- Product Projected AreaUsed to evaluate the required clamping force
- Number of Cavities and Mold LayersAffects required shot volume and platen size
- Required Shot VolumeEstimated material volume per shot based on part weight and number of cavities
- Current Molding Cycle and Defect RateCurrent cycle time and production quality status
- Target Capacity and Implementation ScheduleUsed to evaluate machine configuration and delivery planning
Prepared: 0 / 7 items
JD-RH Series SpecificationsModel Specifications
The JD-RH Series covers eight clamping-force classes from 65 to 800 tons. Use the table below to identify a suitable starting range for your product requirements. Hover over a model column to compare its specifications across all rows.
| Item | 65T | 150T | 200T | 260T | 300T | 400T | 500T | 800T |
|---|---|---|---|---|---|---|---|---|
| Clamping Force (ton) | 65 | 150 | 200 | 260 | 300 | 400 | 500 | 800 |
| Shot Volume (c.c.) | 300/500 | 500/1000 | 1000/1500 | 1500/2000/2500 | 2000/2500/3000 | 2500/3000/4000 | 3000/4000/5000 | 7000/10000/12000 |
| Injection Pressure (kgf/cm²) | 1600 | 1600 | 1600 | 1600 | 1600 | 1600 | 1600 | 1600/1100/1100 |
| Screw Diameter (mm) | 32 | 45 | 45 | 45 | 50 | 50 | 50 | 65 |
| Strip Dimension, T × W (mm) | 6×30 | 10×60 | 10×60 | 10×60 | 10×60 | 10×60 | 10×60 | 10×60 |
| Daylight Max. (mm) | 500 | 550 | 650 | 650 | 700 | 800 | 800 | 1200 |
| Oil Hydraulic System (HP) | 7.5 | 10 | 15 | 20 | 25 | 30/30/40 | 30/40/40 | 50 |
| Oil Tank Capacity (L) | 280 | 350 | 430 | 430 | 470 | 560 | 560 | 700 |
Swipe horizontally to view the full table.
System pressure is 210 kg/cm² across the series. Listed values are based on standard configurations. Optional and customized configurations may differ; final specifications are subject to the delivered machine.
Need Full Specifications?
Platen size, piston stroke, machine dimensions, machine weight and other items may have multiple configurations by tonnage. Submit your product and mold requirements and we will coordinate with JING DAY to provide the appropriate catalog and machine-selection recommendation.
About JING DAY MachinerySince 1983
JING DAY MACHINERY INDUSTRIAL CO., LTD. has specialized in rubber and silicone molding equipment since 1983. Its product portfolio includes rubber injection molding machines, hydraulic molding machines and related solutions for global customers. The JD-RH Series is JING DAY's direct clamping rubber injection molding machine line, with clamping forces from 65 to 800 tons.
1983Founded
65–800tonClamping Force Range
10LanguagesWebsite Languages
Video: Discover JING DAY Machinery
An official JING DAY company introduction video (English).
See the manufacturing team and factory behind the JD-RH Series.
▶ Click the image to play
Frequently Asked QuestionsFAQ
What rubber materials can the JD-RH Series process?
JING DAY positions the JD-RH Series for natural rubber, synthetic rubber, oil-resistant rubber, heat-resistant rubber and reclaimed rubber products. Actual suitability should still be evaluated according to the compound formulation, hardness and vulcanization system.
How is direct clamping different from other clamping methods?
With direct clamping, hydraulic cylinders apply force directly to the platen, creating a short and straightforward clamping-force transmission path. For rubber molding, platen rigidity and force distribution are important because they can affect flash control and part consistency. Suitability should still be evaluated according to mold layers and product precision requirements.
How should I select the required clamping tonnage?
Clamping force alone is not enough. Product projected area, number of cavities, mold layers, required shot volume and platen size should be evaluated together. The application range can also differ among shot-volume configurations within the same tonnage. Providing a product drawing or mold specification is recommended before final machine selection.
Does the machine need to be readjusted when changing rubber hardness or compound formulation?
Yes, but the setup does not need to start from zero. The injection system provides three-stage pressure and four-stage speed control for different rubber compounds, while the PLC and HMI can store and recall production parameters for faster changeovers. The actual number of recipes that can be stored depends on the controller specification.
What information should I bring for an on-site consultation?
We recommend preparing a product drawing or sample, rubber compound and hardness, number of cavities and mold layers, current molding cycle and defect rate, and expected production capacity. More complete information allows the team to evaluate the machine model and auxiliary configuration more efficiently.
Bring Your Product Drawing and Current Molding Conditions to TaipeiPLAS 2026
We can help organize your product specifications, rubber conditions and production-capacity requirements, then coordinate with the JING DAY team to evaluate the suitable JD-RH tonnage, shot-volume configuration and auxiliary equipment.
Book an On-site ConsultationRequest Machine Selection and Process EvaluationInquiry
To help us evaluate your request efficiently, please provide your product drawing, rubber type and hardness, number of cavities and current molding cycle whenever possible.
✓
Thank You for Your Inquiry
Thank you for contacting us. We will get back to you as soon as possible.
Exhibitor Contact Information
JING DAY MACHINERY INDUSTRIAL CO., LTD.
Address: No. 195, Yongke Huan Rd., Yongkang Dist., Tainan City 710, Taiwan
TEL: +886-6-2320999 FAX: +886-6-2325333
Email: jingday@jing-day.com.tw
Website: www.jingday.com