Aluminum alloy 75 folding door | Detailed explanation of parameters, performance, advantages and applicable scenarios of 75 series heavy-duty broken bridge folding door

Aluminum alloy 75 folding door overall floor real scene, large opening panoramic effect display

First, aluminum alloy 75 folding door product basic overview and positioning

Aluminum alloy 75 folding door is currently the mainstream high-end heavy-duty folding door series for home improvement and tooling large space transformation. The industry name is derived from the thickness of the 75mm frame structure, which belongs to the standard thickened broken bridge system folding door. Differentiate between ordinary 55 and 60 series light and thin folding doors, 75 series positioning large holes, high load-bearing, high sealing, high wind pressure resistance scenes, is the preferred product for balconies, shops, courtyards, and large transparent spaces.

Many owners and engineers are prone to confuse ordinary folding doors with 75 heavy-duty folding doors. Ordinary thin folding doors are only suitable for indoor lightweight partitions, with weak wind pressure, sealing, and load-bearing. 75 folding doors, on the other hand, use thickened profile cavities, multi-cavity structures, and heavy-duty hardware adaptations to solve the problems of large-span opening, floor-to-ceiling window closure, shop facade, and villa courtyard lighting and ventilation.

The 75 series aluminum alloy folding door integrates large opening rate, panoramic vision, sound insulation, waterproof and airtight, and stable anti-theft. After opening, all the doors are side-stacked and closed, and the opening rate can reach more than 90%. It completely breaks through the limitations of traditional sliding doors and casement doors. It not only retains the transparent appearance of space, but also takes into account building energy conservation and safety protection. It is a popular door and window product for modern minimalist decoration and commercial space transformation.

75 folding door 75mm profile section thickness size close-up

Second, aluminum alloy 75 folding door core profile material and structural process

The profile is the core of the stability of the 75 folding door. The regular 75 folding door uniformly adopts the national standard 6063-T5 primary aluminum alloy profile, and refuses to recycle miscellaneous aluminum. The profile has high hardness, strong toughness, not easy to deform, and excellent wind pressure resistance. The wall thickness of the whole frame meets the industry standard thickening specifications. The cavity adopts a three-cavity integrated structure design, which realizes the functions of heat insulation, sound insulation and drainage in layers, and the structural mechanics are more stable.

As a broken bridge series folding door, the 75 folding door is standard with PA66 national standard nylon thermal insulation strip, which isolates the conduction of hot and cold bridges, and completely solves the problems of ordinary non-broken bridge aluminum doors and windows being hot in summer, condensation in winter, and poor thermal insulation. Compared with low-priced PVC thermal insulation strip products on the market, genuine PA66 thermal insulation strips are resistant to high temperature, non-shrinkage, and non-deformation. Long-term outdoor exposure does not age, ensuring the stable performance of doors and windows for decades.

In the production process, the 75 folding door adopts precision numerical control cutting, 45-degree seamless corner group, high-pressure glue injection reinforcement process, and the corner is injected with special corner group glue to prevent the loosening of the corner seam of the door and window, water seepage, cracking, abnormal sound and other common diseases. The overall frame fan has high bonding accuracy and strong structural integrity. The load-bearing capacity of a single door fan can reach 120-180kg, which is suitable for large-size ultra-high and ultra-wide glass configuration.

75 Folding door three-chamber structure, heat insulation strip, group corner glue injection process details

Third, aluminum alloy 75 folding door glass configuration and sound insulation performance

75 series folding doors are high-end system doors and windows, and the glass configuration directly determines the comfort and energy saving level of the home. Conventional standard 5 + 12A + 5 hollow tempered glass, laminated insulating glass, Low-E coated glass, double-layer hollow thickened glass can be upgraded on demand, suitable for different noises, climates, and usage scenarios.

The dry air layer inside the insulating glass effectively blocks air heat convection, blocks outdoor high temperature radiation in summer, and locks indoor heating in winter, which greatly reduces air conditioning energy consumption. In noisy environments facing streets, roads, and shops, laminated insulating glass can be configured, with a sound insulation capacity of up to 45dB, effectively isolating traffic noise and noisy voices, creating a quiet indoor environment.

At the same time, all glass has 3C national tempering certification. The strength of tempered glass is several times that of ordinary glass. After breaking, it is in an obtuse state of particles, which is not easy to hurt people, and meets the safety specifications of villas, high-rise and shops. For sun rooms and terraces, low-radiation glass can be selected to block direct ultraviolet rays and protect indoor furniture and floors from fading and aging.

75 schematic diagram of insulating glass structure and sound insulation principle of folding door

IV. Design of sealing and waterproofing system for aluminum alloy 75 folding doors

The biggest common problem of folding doors is that there are many gaps and it is easy to leak air and water, and 75 heavy-duty folding doors completely solve the pain points of the industry through multi-seal structure. The product adopts a three-dimensional sealing system, and the frame fan lap position, door leaf splicing position, and track position are all equipped with high-elastic EPDM EPDM EPDM sealing strip.

EPDM rubber strips are resistant to high and low temperatures, anti-aging, non-hard, and non-shrinking. They maintain high elasticity and fit in all seasons. Compared with ordinary rubber strips, the service life is increased by more than 3 times. Multi-seal layers block airflow, rainwater, and dust, making the 75 folding door airtight and watertight grade far exceed ordinary folding doors. There will be no water seepage, air leakage, and ash ingress problems in typhoon weather and rainstorm weather.

The bottom track adopts high and low rail drainage structure, with its own hidden drainage holes. The rainwater is automatically discharged along the slope of the track, without water accumulation or backflow, completely solving the problem of rainwater backflow from balconies, terraces and courtyards. The whole door has strong sealing and good dust-proof effect, making it very suitable for use in street-facing, windy, sandy and rainy areas.

75 folding door three sealing strips, hidden drainage structure details

5. Aluminum alloy 75 folding door heavy-duty hardware system and opening and closing experience

The 75 folding door is a heavy door leaf structure, and ordinary light and thin hardware cannot be adapted. The regular 75 series is fully equipped with thickened heavy-duty special folding door hardware, including load-bearing hinges, stainless steel pulleys, multi-point locking systems, and anti-pinch buffer accessories.

The load-bearing hinge is thickened and reinforced, and a single fan can withstand excessive weight. It can be opened and closed for a long time without falling, deformation, or derailment. The bottom pulley is made of high-quiet stainless steel wheel, and the push-pull folding is smooth and silent, without cards or harsh noises. It can be easily opened and closed by the elderly and children.

The door lock adopts a multi-point linkage locking structure. After closing, the upper and lower multi-points are locked synchronously. The frame fan is tightly fitted, and the anti-theft and sealing properties are double improved. At the same time, it has its own anti-clamping design, which buffers and slows down during opening and closing, effectively avoids clamping and bumping, and has a higher safety factor. The whole set of hardware is resistant to corrosion, rust and wear, and is suitable for outdoor long-term sun and rain environments.

75 Folding Door Heavy Duty Hinges, Pulleys, Multi-Point Lock Hardware Close-up

Sixth, aluminum alloy 75 folding door appearance style and space advantages

The 75 folding door features a minimalist narrow side, a large field of vision, and a panoramic and transparent design. The visual surface lines are slender and simple, and the overall high-end and clean. It is suitable for most home decoration styles such as modern minimalism, light luxury, new Chinese style, and cream style.

The maximum space advantage lies in the ultra-high opening rate. Traditional sliding doors can open up to half the space, and flat doors take up indoor space. However, 75 folding doors can be freely folded and pushed sideways, all closed and welded, and the hole is almost fully open. The space is transparent and unobstructed, and the indoor and outdoor are seamlessly connected, greatly extending the visual space, making small apartments larger and large ones more transparent.

The color supports full-color customization such as matte black, deep space gray, champagne gold, ivory white, fluorocarbon gray, wood grain transfer printing, etc. The surface adopts electrostatic powder spraying process, and the paint surface is delicate and uniform, scratch-resistant and wear-resistant, long-term outdoor non-fading, non-stripping paint, and the appearance lasts for a long time.

75 folding door fully open and closed, minimalist panoramic decoration real picture

Seven, aluminum alloy 75 folding door application scenarios and adaptation advantages

75 series aluminum alloy folding doors are suitable for almost all large hole space scenarios, making them highly practical.

1. Villa balcony and large floor-to-ceiling window renovation: large vision, sound insulation and heat insulation, improving the texture of the mansion;

2. The entrance and exit partition doors of the sun room: transparent lighting, waterproof and heat insulation, and constant temperature in all seasons;

3. Shop facades, restaurants, exhibition halls: fully open and transparent, good drainage effect, closed and sealed to prevent theft;

4. Courtyard entry, terrace, garden partition: free opening and closing, windproof and rainproof, beautiful atmosphere;

5. Indoor large space partitions, office partitions: replace walls, transparent and not oppressive, and the space is flexible and changeable.

Compared with ordinary doors and windows, the 75 folding door takes into account the appearance, performance, practicality and energy saving, making it the most cost-effective and comprehensive high-end folding door solution with the largest opening space.

Shop, villa, sun room multi-scene landing comparison map

Eight, aluminum alloy 75 folding door purchase pit avoidance professional guide

The quality of 75 folding doors on the market is uneven. Many merchants have virtual standard series and reduced matching processes. When purchasing, focus on the following standards:

First, look for the 75mm full-thickness frame to prevent the thickness of 65 and 70 virtual standards.

Second, the bridge structure must be broken + genuine PA66 thermal insulation strips, and non-broken bridges and PVC false thermal insulation strips must be rejected;

Third, check the wall thickness of the profile and the glue injection process of the group corner. The product without glue injection will loosen and leak in the later stage;

Fourth, choose 3C toughened insulating glass and soundproof glass according to the noise environment.

Fifth, look for heavy-duty special folding hardware, light and ordinary hardware must be dropped later.

Sixth, priority is given to EPDM three-way sealing structure, and the single-way sealing product has serious air leakage and water leakage.

The 75 folding door produced by a regular manufacturer has stable performance, advanced appearance, strong durability, and a normal service life of more than 20 years.

Full text summary

As a benchmark product for high-end 75mm heavy-duty broken bridge folding doors, aluminum alloy 75 folding doors have become the mainstream choice for home improvement balconies, sun rooms, villa courtyards, and shop tooling with the advantages of thickened three-cavity profile structure, broken bridge thermal insulation design, three-way sealing and waterproofing, heavy-duty load-bearing hardware, and panoramic oversized opening.

It solves many pain points such as small opening of traditional doors and windows, poor sealing, weak sound insulation, easy deformation, and low appearance. It not only meets the aesthetic needs of modern decoration, but also realizes the practical performance of heat insulation, heat preservation, sound insulation, waterproofing, and anti-theft.

For the transformation of large hole space, we want a wide field of vision, transparent space, stable performance, and long-term durability. The 75 series aluminum alloy folding door is currently the most cost-effective and professionally adaptable door and window solution in the industry.