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Wholesale Door Closer

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Door Closer Manufacturers

The door closer is a spring-like hydraulic device on the door head. When the door is opened, it can be compressed and then released to automatically close the door. It has the same function as a spring door, ensuring that the door is accurately and timely closed to the initial position after it is opened. The significance of the door closer is not only to close the door automatically, but also to protect the door frame and door body (smooth closing). More importantly, the door closer has become an indispensable executive part of modern building intelligent management.

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About Us

Hangzhou Hengli Metal Products Co., Ltd is Wholesale Door Closer Manufacturers and Door Closer Suppliers. After more than 20 years of hard work, Hengli Hardware has become a pioneer in the industry. Many products produced by the company have gradually become popular among the public, such as cabinet shakers, bathroom shakers, etc. This shows that Hengli metal products have wide recognition and influence in the market. Regarding product quality and innovation, Hengli Metal has always adhered to the tenet of "quality, service, and credibility". While focusing on product quality and technology, Hengli also continues to maintain its corporate innovation vitality, create value for customers, and drive industry development. This shows that Hengli has performance in product quality and innovation and can promote the development direction of the industry. Product design and style remain unchanged. Product design is refined, performance is optimized, and quality is guaranteed. Hengli has launched in-depth cooperation with a number of well-known customized furniture brands, such as OrangeBox, Viccarbe, Spain, AndreuWorld, Denmark Bolia, Italy laVicidina, Finland Taiga, Abstracta, Sweden, Turnstone,m.a.d, Japan Okamura and other brands. The recognition and market influence of these brands have been widely recognized. This shows that Hengli's products and services have been widely recognized by the market and become a pioneer in the industry. We offer OEM/ODM Door Closer.

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Door Closer Industry knowledge

What specific measures do door closer manufacturers take in terms of closing speed, force adjustment and low noise design of door closers?

Closing speed adjustment
Adjustment valve design:
Door closers are usually designed with two hydraulic valves, which control two closing speeds respectively. Speed ​​1 adjusts the closing speed when the door leaf opens from 90 degrees to 20 degrees, and speed 2 adjusts the closing speed when the door leaf opens from 20 degrees to 0 degrees (i.e. the door is fully closed).
When adjusting, users can adjust the speed by rotating the valve screw. Clockwise rotation of the valve screw can slow down the speed, that is, reduce the closing force of the door closer; counterclockwise rotation can speed up the speed and increase the closing force of the door closer.
Precise adjustment and testing:
During the adjustment process, it is recommended to control the fluctuation range within a very small range and conduct a test after each adjustment to ensure that the door frame strength is suitable to avoid loose screws or oil leakage of the door closer due to excessive adjustment.
Force adjustment
Spring force adjustment:
The force of the door closer can be changed by adjusting the force of the internal spring. When the spring force is insufficient, the force can be increased by rotating the adjustment screw counterclockwise; when the force is too large, the force can be reduced by rotating the adjustment screw clockwise.
Slider position adjustment:
In addition to the spring force, some door closers also allow the force to be changed by adjusting the slider position. The change in the slider position will affect the resistance of the door closer during the closing process, thereby adjusting the force.
Low noise design
Material selection:
The key components of the door closer are made of low noise materials, such as using materials with low friction coefficients to make sliding parts to reduce the noise caused by friction.
Structural optimization:
The internal structure of the door closer is optimized to reduce unnecessary gaps and loose parts to reduce the noise caused by vibration and collision.
Buffer design:
In the closing process of the door closer, a buffer design is added, such as using a hydraulic buffer device or a spring buffer device to slow down the collision speed between the door leaf and the door frame, thereby reducing the closing noise.
Sound insulation technology:
Use sound insulation materials or sound insulation technology at key parts of the door closer, such as installing sound insulation pads and using sound insulation coatings, to further reduce noise transmission.

For doors of different materials and weights, how can the door closer factory ensure that the door closer can work stably and efficiently?

Door closer selection and design
Load-bearing capacity matching:
The door closer factory should select the appropriate door closer model according to the material and weight of the door. For example, for heavier solid wood doors, a door closer with a higher load-bearing capacity needs to be selected.
Ensure that the load-bearing capacity of the door closer can meet the actual needs of the door to avoid damage or failure due to insufficient load-bearing.
Adaptive design:
When designing the door closer, consider the density and stability differences of doors of different materials, and use appropriate materials and structural designs to improve the compatibility and adaptability of the door closer.
Accurate installation guidance
Installation position and height:
Provide detailed installation guidance, including the installation position of the door closer (such as the top or bottom of the door), installation height (such as 2/3 of the door leaf), etc., to ensure that the door closer can perform best.
For top-mounted door closers, emphasize processing accuracy requirements to ensure that it is level with the door frame.
Installation steps and tools:
Provide clear installation steps and a list of required tools (such as electric drills, screwdrivers, wrenches, etc.) so that installers can complete the installation work correctly and efficiently.
Debugging and testing
Adjustment of action force:
After the door closer is installed, the action force needs to be adjusted. By adjusting screws and other components, the opening and closing force of the door closer is moderate to avoid excessive or insufficient force affecting the closing effect of the door.
For doors of different materials and weights, adjust the opening and closing speed of the door closer to control the opening and closing speed and force of the door.
Function test:
After completing the installation, test the opening and closing effect of the door closer to check for abnormal conditions (such as sudden acceleration, deceleration, rebound, etc.), and make necessary adjustments.