China Gearbox NVI Series for Large Tonnage Injection Molding Machines - Trusted Suppliers & Factory Solutions

A core transmission component designed specifically for injection molding machines, this dedicated gearbox reducer plays a crucial role in optimizing power transmission and boosting the performance of injection molding equipment. Manufactured by top China suppliers and factories, it meets the highest standards for energy saving, environmental protection, noise reduction, and efficiency improvement. This gearbox reducer is essential for supporting the high-quality development of the injection molding industry, making it a preferred choice for global manufacturers seeking reliable and advanced solutions

Model Representation

Product Details

Products Parameters

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.

Weight may vary depending on the reducer ratio and configuration.

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) ①	A (mm)	B (mm)	C (mm)	D (mm)	E (mm)	Weight (KG) ②	Oil (L) ③
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
250	20	34100	1020	570	310	410	600	960	70
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
360	31.5	76900	1448	867	400	570	710	2200	160

Appendix 1 Load Service factor (SF)
Daily running time	4 hours			8 hours			16 hours			24 hours
Operations per hour	<10	100-200	>200	<10	100-200	>200	<10	100-200	>200	<10	100-200	>200
Ⅰ	0.7	0.8	1	0.9	1	1.1	1	1.1	1.2	1.2	1.3	1.5
Ⅱ	1	1.1	1.3	1.1	1.2	1.3	1.2	1.4	1.5	1.4	1.5	1.6
Ⅲ	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
Type of lubricant	Application	Lubricant
		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

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

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

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

Shaft Assembly Code

The design process of gearbox

From Prototype to Application

Product application

Frequently Asked Questions

How is the rated torque of the reducer calculated?

The rated torque values are calculated using a coefficient of 1. When calculating the maximum usable horsepower, please make sure to consider a safety factor of 1.7.

What are the characteristics of the built-in cooling method?

The built-in cooling method uses a copper plate with superior thermal conductivity to separate the oil cavity inside the reducer. Additionally, an external cover for the cooling water circulation pipeline is added to pass cooling water, which effectively limits the temperature rise of the reducer during operation.

Which models are compatible with the built-in and external cooling methods?

The built-in cooling method is applicable to models 160, 180, 200, and 225. The external cooling method is suitable for larger models, specifically 250, 300, and 360.

How does the external cooling method benefit the reducer?

The external cooling method utilizes a motor pump and a plate heat exchanger. This configuration reduces the overall amount of oil required inside the internal oil chamber, effectively controls the temperature rise, and decreases the physical weight of the reducer itself.

What energy savings can be expected with the NVI gearbox reducer?

By utilizing precision helical gear meshing and achieving a transmission efficiency of over 95%, the NVI gearbox reducer significantly cuts down transmission energy loss. It helps lower the overall energy consumption of injection molding machines by 20%-30% compared to conventional hydraulic motors.

What load service factor (fB) should be used for 24-hour continuous operation?

Based on experience and standard operating guidelines, a load service factor of fB = 1.7 must be applied when choosing the correct gear size for a 24-hour continuous operation.