Product Overview
This specialized high-tonnage injection molding machine is engineered specifically for manufacturing heavy-duty, foldable (collapsible) plastic crates used in agriculture, logistics, and retail. It features an optimized screw design and clamping mechanism to handle complex integrated hinges, thin-wall rib structures, and snap-lock systems without warping or flashing.
Core Advantages
Flawless Hinge Formation: Multi-stage injection speed and closed-loop pressure control prevent stress concentration, ensuring the integrated hinges withstand 10,000+ folding cycles.
Platen Rigidity & Mold Protection: Reinforced, high-rigidity platens with low-pressure mold protection prevent mold deformation and extend expensive collapsible mold lifespan.
High-Flow Plasticizing: Customized screw geometry guarantees 120–300 kg/h plasticizing capacity, optimizing the filling of thin-walled structural ribs using either 100% virgin or recycled HDPE/PP.
Fast Cycle Times: Optimized hydraulic circuit and high-flow valves achieve a 45 to 120-second cycle time (design-dependent), maximizing daily ROI.
Global Supply Chain & Component Standards
To ensure global maintenance compatibility and 24/7 production reliability, we utilize world-class components:
Control System: KEBA (Austria) / Gefran (Italy) dedicated injection PLC.
Hydraulic Valves: Yuken (Japan) / Rexroth (Germany) proportional valves.
Servo Drive: Phase (Italy) / Innovance servo system.
Sealing Elements: NOK (Japan) hydraulic seals to ensure zero leakage under continuous high pressure.
Quality Assurance & Testing Protocols
Every machine undergoes strict industrial verification before dispatch:
72-Hour Continuous Dry Run: Mechanical and hydraulic stability test.
Full-Load Shot Verification: Testing structural stability at maximum injection weight and pressure.
Platen Parallelism Check: Measured via dial indicators to ensure parallelism within ≤ 0.05mm under full clamping force.
CE & ISO9001 Compliance: Full documentation provided for European and American customs/factory audits.
Optional Automation Modules
High-speed 3-axis/5-axis servo robot for automatic crate demolding.
Integrated In-Mold Labeling (IML) system for logistics barcodes.
Post-molding automated folding, stacking, and palletizing line.
IoT remote diagnostics module for real-time OEE tracking.
Machine Parameters
|
ITEM |
UNIT |
SZ-5500A |
||
|
INJECTION UNIT |
||||
|
SCREW DIAMETER |
mm |
80 |
85 |
90 |
|
SCREW LID RATIO |
L/D |
22.3 |
21 |
19.8 |
|
THEORETICAL SHOT VOLUME |
CM3 |
2141 |
2418 |
2710 |
|
SHOT WEIGHT(PS) |
g |
1948 |
2200 |
2466 |
|
INJECTION PRESSURE |
Mpa |
188 |
167 |
149 |
|
THEORETICAL INJECTION RATE(PS) |
g/s |
427 |
482 |
541 |
|
PLASTICISING CAPACITY |
g/s |
80 |
100 |
118 |
|
SCREW TORQUE |
N.m |
5170 |
||
|
MAX.SCREW ROTATE SPEED |
r/min |
150 |
||
|
INJECTION STROKE |
mm |
425 |
||
|
CLAMPING UNIT |
||||
|
MAX.CLAMPING FORCE K |
KN |
5500 |
||
|
MAX.OPENING STROKE |
mm |
820 |
||
|
SPACE BETWEEN TIE BARS |
mm |
810×810 |
||
|
MOULD HEIGHT |
mm |
350-820 |
||
|
MAX.DAYLIGHT |
mm |
1640 |
||
|
EJECTOR FORCE |
KN |
150 |
||
|
EJECTOR STROKE |
mm |
210 |
||
|
EJECTOR QUANTITY |
13 |
|||
|
OTHER |
||||
|
PUMP MOTOR POWER |
KW |
55 |
||
|
PUMP PRESSURE |
Mpa |
16 |
||
|
HEATING POWER |
KW |
33 |
||
|
HEATING ZONE |
6 |
|||
|
SIZE |
m |
8.4×2.2×2.6 |
||
|
NET WEIGHT |
t |
23.5 |
||
|
OIL TANK CAPACITY |
L |
1000 |
||
|
INTERNATIONAL DESIGNATION |
5500-4040 |
|||


Machine configuration

After-sales service
We provide free accessories to keep the machine running without any problems
Company Profile

Buyer evaluation
We are 20 years manufacturer of the injection molding machine in China, more than 1500 customers all over the world.

Packaging & Shipping
Certifications
FAQ
Q: Why does a collapsible crate require a higher-tonnage machine than a standard solid crate of the same volume?
A: Collapsible crates are molded as flat panels with extensive rib networks and integrated thin-wall hinge structures. This flat, large surface area creates a significantly higher projected area, requiring immense clamping force (500T-1000T) to prevent mold deflection and parting-line flash.
Q: How does the machine prevent the integrated hinges from becoming brittle or cracking during folding?
A: Hinge failure is usually caused by internal stress. Our machine utilizes highly precise multi-stage injection speed and closed-loop packing pressure control. This ensures high speed when filling the thin hinge zone to maintain melt temperature, followed by micro-controlled pressure to avoid over-packing, resulting in optimal molecular alignment and high fatigue resistance.
Q: Can your machine handle 100% recycled HDPE/PP materials for cost reduction?
A: Yes. The screw is engineered with a high flight-depth ratio and an optional bimetallic barrel, providing excellent mixing and wear resistance for recycled regrinds. For logistics crates, we recommend a maximum of 70% high-quality regrind mixed with 30% virgin material to maintain impact strength, which our control system stabilizes via adaptive pressure adjustment.
Q: How does the machine protect our expensive collapsible molds from damage?
A: We integrate a low-pressure mold protection system with high-response sensors. If a dropped part or foreign object (even as thin as a single plastic scrap) is detected during mold closing, the clamping action instantly stops within milliseconds, triggers an alarm, and opens the platen to prevent costly mold damage.
Q: What is the average lifespan of this injection molding machine under 3-shift continuous operation?
A: With standard preventative maintenance (oil filtering, toggle lubrication), the heavy-duty mechanical frame and platen have a design life of 10–15 years. Core electronics and hydraulic seals generally require routine replacement cycles every 5–7 years, backed by our global spare parts availability.
Q: Can this machine accommodate molds from different toolmakers?
A: Yes. The platen EUROMAP / SPI hole patterns can be fully customized to match your existing mold drawings. The hydraulic core-pulling sequences and ejector strokes are fully programmable via the KEBA controller to match varied mold mechanical actions.
Q: What is the lead time, and how is the massive machine shipped to our factory?
A: Standard manufacturing and testing time is 35 to 60 working days. For shipping, the machine is modularly disassembled: the injection unit, clamping unit, and power pack are separated, treated with anti-corrosion coating, secured onto heavy-duty steel skids, and loaded into standard 40FR (Flat Rack) or 40HQ containers.
Q: How do you handle installation and after-sales support for international buyers?
A: We provide a comprehensive service package: complete foundation layout drawings before delivery, standard English operation manuals, and video step-by-step guides. For commissioning, we can dispatch overseas field engineers for on-site installation and staff training, complemented by 24/7 remote IoT diagnostics to troubleshoot software or parameter issues instantly.
|
ITEM |
UNIT |
SZ-1300A |
||
|
INJECTION UNIT |
||||
|
SCREW DIAMETER |
mm |
35 |
40 |
45 |
|
SCREW LID RATIO |
L/D |
24 |
21 |
18.7 |
|
THEORETICAL SHOT VOLUME |
CM3 |
173 |
226 |
286 |
|
SHOT WEIGHT(PS) |
g |
158 |
206 |
260 |
|
INJECTION PRESSURE |
Mpa |
235 |
180 |
142 |
|
THEORETICAL INJECTION RATE(PS) |
g/s |
110 |
143 |
181 |
|
PLASTICISING CAPACITY |
g/s |
13.8 |
19.7 |
27.1 |
|
SCREW TORQUE |
N.m |
740 |
||
|
MAX.SCREW ROTATE SPEED |
r/min |
250 |
||
|
INJECTION STROKE |
mm |
180 |
||
|
CLAMPING UNIT |
||||
|
MAX.CLAMPING FORCE K |
KN |
1300 |
||
|
MAX.OPENING STROKE |
mm |
400 |
||
|
SPACE BETWEEN TIE BARS |
mm |
420×420 |
||
|
MOULD HEIGHT |
mm |
160-440 |
||
|
MAX.DAYLIGHT |
mm |
840 |
||
|
EJECTOR FORCE |
KN |
31.4 |
||
|
EJECTOR STROKE |
mm |
100 |
||
|
EJECTOR QUANTITY |
5 |
|||
|
OTHER |
||||
|
PUMP MOTOR POWER |
KW |
13 |
||
|
PUMP PRESSURE |
Mpa |
16 |
||
|
HEATING POWER |
KW |
9.2 |
||
|
HEATING ZONE |
4 |
|||
|
SIZE |
m |
4.7×1.25×1.85 |
||
|
NET WEIGHT |
t |
4.3 |
||
|
OIL TANK CAPACITY |
L |
360 |
||
|
INTERNATIONAL DESIGNATION |
1300-410 |
|||
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