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Gearbox NVI series for large tonnage injection molding machine

A Core Transmission Component Empowering Injection Molding Production. The dedicated gearbox reducer for injection molding machines is a key component designed to optimize power transmission and enhance the overall performance of injection molding equipment. Its development focuses on four core demands: energy saving, environmental protection, noise reduction, and efficiency improvement, providing essential support for the high-quality development of the injection molding industry.

Model Representation

QQ20250830-183901

Products Parameters

detail
①: The rated torque values ​​listed below are calculated using a coefficient of 1. When calculating maximum usable horsepower, please consider a safety factor of 1.7. See Appendix 1 for details.
②: Weight may vary depending on the reducer ratio and configuration.
③: The oil quantity may vary depending on the ratio, gear oil viscosity, and other factors. Add the appropriate amount of oil based on the actual oil level gauge. For oil grades, see Appendix 2.

Size

Ratio(i)

Torque Mn(Nm)

A(mm)

B(mm)

C(mm)

D(mm)

E(mm)

Weight(KG)

Oli(L)

160

8

5590

655

385

180

266

320

160

18

10

6520

12.5

6600

14

6750

16

6800

180

10

9300

732

432

200

296

360

230

26

12.5

9500

14

9700

16

9800

18

9850

200

10

13200

810

485

225

330

400

362

45

12.5

13240

16

13300

18

13380

20

13500

225

10

17600

907

545

250

360

450

665

66

12.5

18200

16

18300

18

18350

20

18280

250

16

33600

1020

570

310

410

600

960

70

20

34100

300

16

45400

1160

685

350

450

670

1200

105

17

46800

20

47400

22

46800

360

25

74500

1448

867

400

570

710

2200

160

31.5

76900

Appendix 1   Load Service factor (SF)
Daily running time 4 hours 8 hours 16 hours 24 hours
 Operations per hour <10 100- >200 <10 100- >200 <10 100- >200 <10 100- >200
200 200 200 200
0.7 0.8 1 0.9 1 1.1 1 1.1 1.2 1.2 1.3 1.5
1 1.1 1.3 1.1 1.2 1.3 1.2 1.4 1.5 1.4 1.5 1.6
1.3 1.4 1.5 1.4 1.5 1.6 1.5 1.6 1.7 1.6 1.7 1.8
Ⅰ:Even load 
Ⅱ:Uneven load, medium masses 
Ⅲ:Uneven load, greater masses
The load Service factor fB refers to the various operating conditions of the gear;
 such as type of load, running time, operation frequency, output speed etc.,
and is therefore imperative when choosing the gear size.Based on our experience,
 a load factor fB=1.7 at 24-hour operation must be considered when choosing the gear.

Appendix 2  Recommended oil types

 

 

 Lubricant

Type of lubricant

Application

OIL

AMBIENT TEMPERATURE

Mineral oil

Reduction gearboxes

ISOVG220EP

-15°C- + 15°C 

-10°C ~+40°C

ISOVG320EP

  Corresponding Lubricants

Type

Brand-name

Type

Brand-name

MELLANAOILBLASIA

IPAGIP

MOBILGEAR600XPOMALAEP

MOBILSHELL

Cooling method: Built in and external

products

Built-in:
Use a copper plate with better thermal conductivity to separate the oil cavity inside the reducer, and add a cover for the cooling water circulation pipeline externally to pass cooling water to better reduce the temperature rise of the reducer during operation.

Applicable models

160

180

200

225

products-2-2

External:
The motor pump and plate heat exchanger can reduce the amount of oil in the internal oil chamber, reduce the temperature rise, and reduce the weight of the reducer itself.



Applicable models

250

300

360

Main Features

Gearbox servo system
In terms of energy conservation, the reducer employs precision helical gear meshing and high transmission efficiency (over 95%), significantly reducing energy loss during power transmission. Compared to conventional hydraulic motors, it helps reduce the overall energy consumption of injection molding machines by 20%-30%. With long-term use, it substantially cuts electricity costs for enterprises, aligning with the current industrial trend of energy efficiency and consumption reduction.

The NVI gearbox reducer delivers precise transmission ratios and high torque output. Equipped with an intelligent control system, it ensures accurate and controllable mold opening/closing and injection actions, minimizing process deviations. Its rapid response capability shortens the injection cycle, improving production efficiency by 10%-15%. This enables enterprises to produce more qualified products within the same timeframe, enhancing their competitiveness.

Mounting Arrangement

detail2

Shaft Assembly Code

detail3

The design process of gearbox

gearbox  1
gearbox 2
gearbox 3

From Prototype to Application

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NVI gearbox (2)
NVI gearbox (3)
NVI gearbox (1)

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