KR-129C Desktop Pneumatic Mini Vertical Injection Molding Machine

Additional information

Micro Pneumatic Injection Molding Machine

How much do injection molding machines cost?

This product is suitable for all kinds of small plastic mold extrusion, small volume, simple operation, low cost, etc. It is the best choice for product research and development, small batch sample production and personal customization.

What are the steps in the injection molding machine process?

Product Details:

RT-129C Desktop Vertical Injection Molding Machine

Product Overview

The KR-129C bench-top pneumatic plastic injection machine is a compact vertical molding solution tailored for laboratory R&D, prototype verification and micro small-batch plastic component production. Powered by stable air pressure drive, this lightweight molding unit requires only standard 220V household power and 0.6MPa air source to operate, eliminating the need for large industrial power and hydraulic oil stations.
Equipped independent dual temperature control zones and interchangeable injection barrels (20g/40g/60g shot capacity), it supports nearly all common thermoplastics including ABS, PP, PC, PET, EVA and biodegradable polymers. With ultra-small footprint and quick mold swap design, it is widely adopted by university polymer labs, new material R&D departments, consumer electronics prototype workshops and small custom molding studios for tensile test specimens, mini electronic connectors and custom plastic part trial production.

Core Product Advantages

  1. Dual Independent Temperature Zones For Precise Melting
    Two separated digital temperature controllers individually regulate feed hopper and nozzle heating sections, with adjustable range from ambient temperature up to 450℃ and control accuracy ±3℃. Users set targeted melting temperatures for different polymers to avoid material degradation or incomplete plasticization during injection cycles.

    2.Modular Multi-Spec Injection Barrel Options

    Three interchangeable plunger barrel assemblies are available: 25mm(20g), 35mm(40g), 45mm(60mm) plunger diameters to match small lab samples and micro finished parts. Removable melting cavity prevents cross-contamination between different colorants or modified plastic formulas, convenient for frequent material switching tests.

    3.Fast Swap Adjustable Mold Clamping Structure

    Side quick-release clamping levers and horizontally adjustable mold brackets allow operators to disassemble and replace molds within minutes without extra tools. Max mold mounting dimension supports up to 210×200mm plates, compatible with small aluminum and steel prototype molds for test bars, USB shells and miniature fittings.

    4.Stable Pneumatic Driving System With Precise Timing

    1-ton constant injection pressure output ensures consistent filling of thin-wall micro parts. The touch-style timing panel sets injection holding time from 0–9999 seconds freely, fully replicating industrial injection holding parameters for accurate material performance comparison between prototype batches. All moving guide columns adopt wear-resistant copper bushings for smooth long-term operation.

    5.Space-Saving Desktop Integrated Layout

    All-in-one vertical frame design weighs only 35–65kg depending on model, easy to move and place on regular lab countertops without dedicated production area. Four anti-slip leveling feet stabilize the whole unit during high-speed injection cycles, reducing vibration and noise in office and lab environments.

    6.Complete Safety Protection Configuration

    Optional safety grating and front protective door cut off injection motion once opened, effectively preventing accidental contact with high-temperature nozzles and moving plungers. High-temperature heating barrel covered with perforated heat insulation shield to avoid operator scald risks during daily operation.

Full Technical Parameter Specification Table

Parameter Item KR-129C-20 KR-129C-40 KR-129C-60
Max Single Injection Volume 20g 40g 60g
Plunger Diameter 25 mm 35 mm 45 mm
Heating Tube Size 25×110 mm 35×110 mm 45×110 mm
Temperature Control Range RT ~ 450℃ (±3℃ precision) Same full series Same full series
Standard Injection Pressure 1 Ton constant pressure Same full series Same full series
Adjustable Injection Time 0 ~ 9999 s arbitrary setting Same full series Same full series
Max Mold Installation Size 200×160×210 mm 200×200×210 mm 210×200×210 mm
Max Plunger Stroke 150 mm Same full series Same full series
Rated Input Power 800 W 1000 W 1200 W
Standard Input Voltage AC220V 50/60Hz Same full series Same full series
Required Air Source Pressure 0.6 MPa stable air supply Same full series Same full series
Complete Net Machine Weight 35 KG 55 KG 65 KG
Overall Outer Dimension 55×60×130 cm 60×66×140 cm 65×66×155 cm
Standard Control Mode Pneumatic semi-automatic operation Same full series Same full series

Standard Complete Operation Process

  1. Mold Installation & Parameter Setup
    Fix prototype mold onto adjustable clamping brackets and lock side levers firmly. Set dual zone heating temperatures according to plastic material melting requirements, wait for temperature constant stabilization for 10–15 minutes.
  2. Raw Material Feeding
    Clean stainless feeding hopper thoroughly and pour dried plastic pellets into the storage bowl; avoid mixed impurities that cause nozzle blockage during melting.
  3. Injection Time Configuration
    Set holding and cooling duration on digital timing panel based on wall thickness of target plastic part, pre-test short shots to adjust filling pressure balance.
  4. Pneumatic Injection Molding Cycle
    Turn on air supply valve, trigger injection cycle; air cylinder pushes plunger down to force molten plastic into mold cavity under constant pressure. The machine automatically maintains holding time before plunger retracts.
  5. Part Demolding & Batch Sampling
    Open protective door and take out cooled molded parts after cycle completion, inspect surface integrity, shrinkage and bubble defects for material formulation adjustment.
  6. Post-Test Equipment Cleaning
    Cool heating barrel down below 100℃, disassemble melting cavity and plunger to clear residual plastic; cut air and power supply when daily testing finishes.

RT-129C Desktop Vertical Injection Molding Machine

Widely Applicable Scenarios & Test Materials

University Polymer Teaching Labs

Tensile/impact standard test bar molding, biodegradable plastic prototype making, modified composite material small batch comparison experiments, student teaching demonstration equipment.

New Material R&D Enterprises

Masterbatch formula trial production, flame retardant/conductive plastic sample verification, high-temperature engineering plastic (PC/PA/PPS) melt forming testing.

Consumer Electronics Prototype Workshops

USB connector shells, earphone plastic housings, miniature switch parts, thin-wall electronic insulating component trial molding.

Small Custom Molding Studios

Craft plastic ornaments, cosmetic small fittings, toy miniature parts, low-volume personalized plastic goods short-run production.

Packaging & Medical Material Labs

Disposable micro plastic fittings, transparent packaging sheet test samples, medical grade PP/PE component prototype verification.

Compatible Thermoplastic Raw Materials

ABS, PP, PE, PET, PVC, EVA, HDPE, PLA biodegradable resin, PPR, PC, Nylon PA, filled composite plastics, flame retardant modified pellets.
RT-129C Desktop Vertical Injection Molding MachineRT-129C Desktop Vertical Injection Molding Machine

Standard Factory Delivery Kit

  1. KR-129C main vertical pneumatic injection molding host
  2. Matching stainless feeding hopper and heating barrel assembly
  3. Corresponding size plunger rod for selected injection capacity
  4. Complete air pressure regulating valve and air pipeline fittings
  5. Dual digital temperature control panel + timing control module
  6. Adjustable mold clamping bracket and quick-release lever set
  7. Multi-language operation guide & factory calibration inspection certificate
  8. Export standard wooden packaging case for sea/air transportation

Global Distributor & After-Sales Service

We provide one-on-one remote machine operation training and material temperature parameter matching guidance, with long-term supply of spare heating tubes, plungers and pneumatic cylinder components. Custom 60Hz overseas voltage conversion versions and extended high-temperature heating modules are supported for bulk orders. Exclusive regional agent policies include priority production scheduling, OEM private brand customization and full sets of high-definition product marketing pictures.

English Overlay Text For All Product Pictures

Main Banner Title: KR-129C Desktop Pneumatic Mini Vertical Injection Molding Machine

Control Panel Tags: ZONE 1 TEMP / ZONE 2 TEMP / INJECTION TIMER / START / EMERGENCY STOP

Feature Overlay Tags: Dual Heating Zones / 20-60g Interchangeable Barrel / Quick Mold Change / 0.6MPa Air Drive / Lab Desktop Compact Design

Safety Operation Tip: Wait Heating Barrel Fully Cool Before Disassembly Cleaning

Packing & Delivery

Shipping:

-By sea
-By plane
-By couriers, TNT, DHL, FEDEX, UPS, etc.
 
Standard Export carton:
1. Inner Package: Thin plastic film surrounds the machine;
2. Outer Package: Internationally standard package export safety wooden case.
packing

Build Your Market with DGKAREY

KAREY products are trusted by customers across more than 100 countries, supporting long-term business growth in the testing equipment industry.
We are now seeking reliable partners to represent our brand in their local markets.

As an authorized distributor, you will receive dedicated regional support, ensuring a stable and protected business environment.
Your orders will be handled with priority, and our team will assist you with tailored equipment solutions based on your market needs.

From initial cooperation to ongoing development, we work closely with you to strengthen your presence and competitiveness.

DGKAREY – Your Reliable Partner in Global Supply

We go beyond supplying testing equipment. Our team manages the full journey — from export procedures to delivery at your door — ensuring efficiency, transparency, and peace of mind.

KR-129C Desktop Pneumatic Mini Vertical Injection Molding Machine

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Contact Information

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Opening Hours

Monday – Friday 9am-5pm 
Weekend – Closed

Address

Wentang, DongCheng District 523000, Dongguan City, Guangdong Province, PR China