Rapid door frame sealing system composition

The composition of the sealing system of the rapid door: by the track, Seal Element, Seal Strip.

1. High Speed Door Track

1.1 Rail material: cold-rolled steel plate, SUS304, aluminum alloy and other materials

1.2 Role: guiding function, support function, limit function, protection function.

1.3 The connection between the track and the sealing system: close cooperation to realize the sealing, the influence of the track structure on the sealing, and the reaction of the sealing system on the track.

2. Seal Element: Brush seals / zipper type high speed fabric door sealing device.

2.1 Brush sealing principle: physical filling principle, flexible contact principle, multi-layer protection principle, airflow cushioning principle.

2.1.2 Role: Sealing dust, insect and rodent prevention, reduce air convection, buffer shock absorption, adapt to the deformation and displacement of the door.

2.1.3 The association between brush seals and sealing system: Brush seals are an important part of the sealing system. Working together and complementing each other's functions, they enhance the overall sealing performance and prolong the life of the sealing system.

2.2 Zipper sealing principle: Bite and seal mechanism, elastic adaptive principle, continuous sealing characteristics.

2.2.2 Role: efficient sealing, connection and stabilization, adaptation to deformation functions

2.2.3 Association of zipper seals and sealing system: constitute the core components of the sealing system, enhance the integrity of the sealing system, and work together to enhance the sealing effect.

2.3 Differences between the use of brush seals and zipper structure seals in fast doors

2.3.1 Differentiation of use scenarios

Brush seals are suitable for places where the requirements for sealing are not extremely stringent, and where the main focus is on preventing the entry of dust, hair, fibers and other small solid impurities.

For example, in general industrial warehouses, where a large amount of dust is generated during the handling of goods, brush seals can effectively block dust from entering the interior of the warehouse and avoid the accumulation of dust on the surface of the goods. Can also be used in some general production workshop, such as simple mechanical processing workshop, to prevent the processing of metal shavings, dust, etc. spread to other areas of the workshop.

Zipper construction seals are more suitable for use in scenarios where environmental sealing is critical.

For example, a food processing plant needs to be strictly protected from outside dust, bacteria, microorganisms and water vapor in order to ensure the hygiene, safety and quality of food.

The same is true for pharmaceutical plants, where any external contaminants must be avoided to affect the purity and quality of the drug product, and zipper construction seals provide a more complete and reliable seal.

In the electronic chip manufacturing workshop, the air cleanliness, temperature and humidity control requirements are extremely high, which can effectively isolate dust particles and maintain a stable internal environment to prevent the chip from being contaminated and defective products.

2.3.2 Different maintenance costs

Brush seals are relatively low maintenance. Its construction is simple and the main maintenance is to check the bristles regularly for wear. If the bristles are badly worn or have fallen out, replacement is simply a matter of installing a new brush on a fixed base at the edge of the door.

For example, the general small factories of the rapid door brush seals, in the discovery of brush hair wear, the staff can purchase their own brush of the same specifications for replacement, without the need for professional maintenance tools and technicians, the cost is mainly concentrated in the purchase of brushes on the cost.

Zipper construction seals are more expensive to maintain. Due to their complex construction, they involve precisely occluded parts such as bumps and grooves on the door body and frame. In the event of problems such as poor sealing, specialized technicians using specialized tools may be required to inspect and repair them.

For example, if the zipper teeth are broken or deformed, it may be necessary to dismantle part of the door structure to replace the damaged parts, and these special zipper parts tend to be more expensive, and it may also be necessary to pay for a technician's visit to repair the zipper, so the overall maintenance cost is higher.

2.3.3 Service life

Brush seals usually have a short service life. The bristles are prone to wear, aging and even breakage after long-term friction with the door frame and erosion by external dust and impurities. In general industrial environments, brush seals may need to be replaced in 1 - 2 years for fast doors that open and close frequently.

For example, in a logistics warehouse, where goods come in and out frequently every day and the door opens and closes a lot, the bristles of the brush seals may wear out to such an extent that the sealing effect is affected in about a year.

Zipper structure seals have a long service life under normal use and proper maintenance. The zipper teeth made of materials such as plastic or rubber have good abrasion resistance and durability. If the installation environment is stable and not subjected to severe external impact or chemical corrosion, the zipper structure seals can be used for 5 - 10 years.

For example, in some pharmaceutical companies that have well controlled environmental cleanroom fast doors, the zipper structure seals can be about 8 years before the need for repair or replacement may arise.

2.3.4 Operational noise

Brush seals produce less noise during door operation. When the door opens or closes, there is a flexible friction between the bristles of the brush and the door frame, which is relatively gentle and does not produce a sharp or harsh sound.

For example, when brush seals are used in a speed door at the entrance of a shopping mall, the sound emitted by the door during its frequent opening and closing is relatively mild and does not cause any noticeable disturbance to customers.

Zipper structure seals may produce a relatively high level of noise during operation. Because its sealing principle is through the occlusion of the bumps and grooves, the separation and combination of these parts during the movement of the door body will produce a certain mechanical collision sound. Especially when the zipper structure is loose, wear and tear or impurities enter, the noise will be more obvious. For example, in some industrial plants of the fast door, if the zipper structure seals for a long time without maintenance, in the door body opening and closing will be issued when the click of the larger noise, affecting the comfort of the working environment.

3. Seals for fast doors

3.1 Principle of sealing strip: material properties, sealing structure, air pressure balance, elastic deformation.

Material characteristics: usually made of rubber, silicone or other elastic materials, these materials have good elasticity and flexibility, can form a close fit between the door body and the door frame, effectively blocking the penetration of air, water, dust and so on.

Sealing structure: A continuous sealing barrier is formed by installing sealing strips on the door body and door frame. When the door is closed, the sealing strip is squeezed to fill the gap between the door body and the door frame, thus realizing the sealing effect.

Air pressure balance: When the fast door is closed, the space between the door body and the door frame forms a relatively closed area. Through the reasonable design of the structure and position of the sealing strip, you can make the air pressure inside and outside the door body to maintain balance when the door is closed, reduce the impact of air pressure difference on the door body, thus improving the sealing performance of the door.

Elastic deformation: When the door body is subjected to external forces, the sealing strip can undergo elastic deformation and absorb part of the energy, thus reducing the collision and friction between the door body and the door frame, and prolonging the service life of the door.

3.2 The role of the seal: waterproof and dust proof, heat insulation, sound insulation and buffer function.

For example, we often use EPDM sealing rubber strip, the main component is EPDM rubber, which is a terpolymer of ethylene, propylene and non-conjugated diolefin. This special molecular structure gives EPDM rubber strip many excellent properties. It has strong weather resistance, good sealing performance, high chemical stability, and good abrasion resistance.

Performance characteristics: good weather resistance, ozone resistance, heat resistance, acid and alkali corrosion resistance, etc., can be used in a variety of harsh environmental conditions for a long time, to maintain good elasticity and sealing performance, and therefore is widely used in construction, automotive, machinery and other industries in the field of sealing.

Application scope: in the construction of windows and doors, can be installed in the door and window frames and glass, doors and windows between the fan and the frame, effectively sealing the gap, sound insulation, heat insulation, sand, waterproofing, etc.; in automobile manufacturing, used for doors, windows, engine compartment and other parts of the sealing, to prevent the rain, dust, noise invasion of the car to enhance the comfort of the ride; in the industrial equipment, can be used to seal all kinds of pipelines, containers, kettles, etc., to prevent the medium leakage. medium leakage.

There are many brands of EPDM rubber strips on the market, such as Ruida Baibang, Jiangyin Haida, Fanxiang Rubber Strips, Xin'an Dong, Rongji, Hehe, Haopule and so on.

The sealing system of the rapid door frame is constructed by the track, seals and sealing strips in cooperation. The track is made of various materials and functions, and interacts with the sealing system. Brush seals and zipper sealing device sealing principle, role and association with the system have their own characteristics, in the use of the scene, maintenance costs, life expectancy, operating noise differences are obvious. Seals rely on material properties and structural principles to play a role in Waterproof and dust proof, such as EPDM rubber strips with excellent performance by a wide range of industries and many brands. Components complement each other to ensure that the sealing performance of,high speed roller shutter to meet the needs of different places and working conditions, to provide reliable environmental separation and protection for a variety of fields.