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Plastic Junction box Injection molding machine

Plastic Junction box Injection molding machine
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Technical Parameter

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

According to the requirements of the usage environment (such as waterproofing, flame retardancy, and heat resistance), different materials should be selected.

Material

PVC (polyvinyl chloride): High cost performance, good insulation, suitable for indoor dry environments (such as household circuit wiring).

ABS resin: Strong impact resistance, smooth surface, often used in industrial equipment or scenarios requiring frequent disassembly.

PC (polycarbonate): Resistant to high temperatures (-40℃ to 120℃), UV resistant, suitable for outdoor or high-temperature environments (such as street lamp wiring).

PP (polypropylene): Resistant to chemical corrosion, suitable for humid or acidic and alkaline places (such as laboratories, chemical workshops).

Mold design

Based on the product drawings (dimensions, hole positions, sealing grooves, etc.), a 3D mold model is designed using CAD software to ensure accuracy (tolerance within ±0.05mm) and avoid gaps during assembly.

Injection molding production: The mixed plastic pellets are heated and melted (temperature 160-250℃, depending on the material), and then injected into the mold cavity under high pressure by an injection molding machine. After cooling and solidifying, the mold is removed to form components such as box bodies and box covers.

Post-processing: Remove flash and burrs. Some products require drilling (for reserved wire holes), installing sealing rings (to enhance water resistance), or printing labels (such as specifications and protection levels).

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