How to manufacture aluminium windows and doors-step 1: Quality inspection of profiles

  1. Surface quality inspection of profile:

  2. Requirement: The surface is clean and the colour is uniform, and there should be no aluminium shavings, burrs, oil stains, peeling, corrosion spots, spot burns, flow marks and layer defects. The materials of the same model, specification and batch number produced by the same manufacturer are regarded as a batch of inspection, and 3% of each batch shall be randomly selected and no less than 5 pieces shall be inspected. But the best for 10 or less is full inspection.

  3. Inspection method: Observe the appearance under natural light.

How to manufacture aluminium windows and doors-step 2: Accessory

windows and doors accessories:

windows and doors accessories are mainly hardware, sealing materials, auxiliary materials, etc.

  1. The hardware mainly includes: transmission handle, spinning handle, hinge (hinge), transmission lock, sliding support, bolt, lock point, lock, pulley and flat under suspension system, etc.

  2. Sealing materials: rubber strips, wool tops, sealing blocks, files, windproof blocks, glue, etc .;

Hardware storage inspection:

  1. Appearance quality:

The product is in perfect shape, without cracks, deformation, smooth surface, no obvious spots, no sharp edges and burrs and mechanical damage; hardware parts random inspection 5% of the total quantity of the goods in this batch. If it still fails, it is judged as unqualified.

The raw materials sent directly to the construction site are checked and accepted by the person in charge of the project department, and the raw materials entering the company are checked and accepted by the factory quality inspection department.

  1. Inspection method: observe under natural light.

How to manufacture aluminium windows and doors-step 3: Profile calculation

  1. Cutting calculation of aluminium windows and doors:

(1) The blanking of the casement window is as follows:

Width (height) dimension L (H) = opening size-2x gap size. (Among them, when the outer frame is spliced at a 45-degree group angle, the blanking width and height are the outer package width and height.)

Outer package width = (L-2x outer frame material width-middle straight material width + total overlap) / 2

Total overlap of fan width = 2x (amount of overlap with the frame + amount of overlap with each side of the middle vertical frame)

Fan’s outer package height dimension = H-2x outer frame material width + total lap amount

(2) Blanking calculation of sliding window:

Frame height = hole size-2x gap size,

Vertical frame size = height of frame,

Horizontal outer frame blanking size = width-2x vertical material equipment position to the outer size,

Fan width outsourcing size = (L-2x outer frame material width + total overlap on both sides) / 2,

Fan horizontal material length = fan outer package size-2x vertical material width + 2x overlap amount,

Outer fan vertical material height = outer guide rail net space size + up and down overlap amount,

The height of the vertical material of the inner fan = the size of the net space of the inner guide rail + the amount of overlapping up and down,

(Note: Generally, the overlap of the fan frame of the casement window is between 6.5mm and 8mm. The overlap of the upper and lower guide rails of the sliding window is generally between 7mm and 10mm, and the actual situation requires the measurement of specific types of aluminium profiles.)

How to manufacture aluminium windows and doors-step 4: Production process of doors and windows

Production process of sliding doors and windows:

Design (drawing optimization)-profile ordering-blanking-profile processing (punching, pressing, drilling, milling)-wearing tops-installing pulleys-outer frame assembly-installing glass-finished product assembly-inspection and storage-confirming order delivery.

Production process of casement window:

Design (drawing optimization)-profile ordering-profile blanking-profile processing (punching, pressing, drilling, milling)-wearing rubber strips-insert angle code-frame group angle-mounting hinge (or linkage rod)-mounting handle -Glass loading-Finished product assembly-Inspection and storage-Confirmation of order delivery.

How to manufacture aluminium windows and doors-step 5: Profile blanking

Cutting procedures and precautions:

  1. Check the operation and lubrication of the equipment, adjust the size limit, and check the profile at the same time.

  2. Check the colour, model, wall thickness and quantity of the profile according to the order requirements. For the defective profile, the material must be nested or returned, and promptly reported to the person in charge.

  3. When cutting, the first material must be checked with an angle ruler and a tape measure. The length of the aluminium profile and the processing size of the cutting material should be combined to reasonably apply the cutting material. The allowable deviation of the length is 1 ± 0.2 mm, the angle deviation is ∠ ± 5 degrees, and the processing burr should be ≤0.2 mm.

  4. When cutting materials, strictly follow the equipment operation regulations, and do the first inspection, middle inspection, and final inspection three inspections, the random inspection rate is not less than 5%, and the number is not less than 3 pieces.

  5. Adjust the feed rate of the sawing machine according to the section size of the profile, otherwise the machine will be damaged, the saw blade will burst, and the workpiece will be deformed.

  6. The products after cutting should be stacked according to each project, specification and quantity and separated by layers to prevent the surface of the profile from being damaged.

  7. Testing tools: steel tape measure, universal angle ruler, vernier caliper.

(Note: No matter picking or cutting, there is no phenomenon that the surface of the profile is easily scratched by drawing or pulling the profile)

Cutting preparation and equipment

  1. Material preparation: According to the optimized drawing and process card, combined with the length of the specific profile, the length is matched with the reasonable material, the material is optimized, and the material head and waste are minimized.

  2. Cutting equipment: there are profile cutting saws (including 45-degree cutting saws) and angle cutting saws.

The blanking is to handle gently, control the speed of the near knife during operation, and conduct the first inspection of the first material. Combine with the length of the aluminium profile, calculate the size of the blank, and apply the profile reasonably.

How to manufacture aluminium windows and doors-step 6: Machining

Sliding doors and windows

  1. Machining of windows and doors frame:

Scribing the frame material, knocking holes, punching holes, punching drainage holes and frame material interfaces.

  1. Machining of doors and windows:

Mill the ends of the fan material with a cross-section milling machine and punch the drainage holes;

casement windows and swing doors

  1. Machining of windows and doors frame:

Scribing fan material, knocking holes, punching holes, milling ribs, milling drain holes;

  1. Machining of doors and windows:

Mill the ribs and keyholes of the fan material;

Select the corresponding corner code, and cut according to the process size requirements.

When knocking on the eyes, you must pay attention to that the two ends of the profile should be aligned with the material head, so as to avoid the difference between the upper and lower heights during assembly.

How to manufacture aluminium windows and doors-step 7: Windows and doors assembly

There are three types of assembly methods for aluminium windows and doors: 45-degree butt joint, right-angle butt joint and vertical butt joint. Some sliding windows generally use right-angle butt joint or vertical butt joints. Generally, doors and windows use 45-degree butt joints.

Sliding doors and windows

  1. windows and doors frame assembly:

Install anti-collision block and windproof block, install a sealing block in the profile cross-section cavity, apply structural glue evenly at the interface, splice at right angles, and press the line. Pay attention to the inside and outside, up and down directions of doors and windows when splicing.

  1. Assembly of doors and windows:

The sash material is worn through the top, the pulley is installed below, the upper and lower gears are installed, the lock hook is installed, the inner fan glass is set, the screw is assembled, the glue is glued, and the glue is turned.

Casement windows and swing doors

  1. windows and doors frame assembly:

Wear rubber strips, insert corner codes, play corner glue, splice, and crimp. Pay attention to the up and down and opening directions of the window when splicing and crimping.

  1. Assembly of doors and windows:

Wear rubber strips, set corner codes, play group corner glue, group corner splicing, install sliding supports, install transmission rods, set inner fan glass, play weather-resistant glue, and turn over glue.

How to manufacture aluminium windows and doors-step 8: Method for windows and doors profile top and rubber strip wearing

  1. Matters needing attention in wearing tops and rubber strips:

  2. The sealing strips (nylon sealant strips, nylon brush strips) should be straight, even, and free of detachment, and they must have a good fit and overlap when the window frame is formed and assembled.

  3. When wearing the sealing tape, the relative member of the sealing tape should be extended by 3 mm, and it should be bonded with glue after it is retracted into place.

  4. The sealant seam should be continuous and smooth, and there should be no overflowing adhesive at the joint; the sealant strip should be installed in place, the four corners should be inlaid reliably, and there should be no disengagement, wrinkling and shortages.

Structural glue is applied to the windows and doors frames, and the glue should be evenly applied to the profiles without accumulation.

The screw connection part of the windows and doors frame should be tightened, and there should be no looseness. The round frame screw should be used to fix the outer frame surface.

Pay attention to the up-down and left-right shifting directions when loading, and the shifting should not exceed the profile section.

When installing the pulley, tighten the screws and check whether the diagonal meets the requirements. The pulley should rotate flexibly without jamming.

Sliding support installation

Specification for installation ratio of sliding support for casement windows

Fan width mm, fan height mm, accessory size

Fan width≤400, 1200mm, 8 inch

400 < Fan width≤500, 1400, 10 inches

500 < Fan width≤600, 1500, 12 inches

600 < Fan width≤700, 1500-1600, 14 inches

700 < Fan width≤800,1600-1700,16 inches

800 < Fan width≤900, 1700-1800, 18 inches

Fan width > 900, 1800, 22 inches

Transmission rod installation ratio

Fan height (mm), accessory size

Below 500, 250-300mm

500-800, 400mm

900-1200, 600mm

1200-1500, 800mm

1500-1800, 1200mm

A video of aluminium windows installation

Unable to watch? Try to use the youtube link here:

EEHE and aluminium windows and doors

EEHE is one of the top 3 windows & doors manufacturers in China. With over 10 years’ experience in production and export, EEHE’s products have covered more than 100 countries. We adopt high-end equipment from Italy and Germany. Thanks to technology, clients witness strong workmanship in our windows and doors.

Also, EEHE is famous for a strong capability in customization. Our professional team collaborate with strong sales network. Today you can find EEHE’s products in more than 2,000 cities around the world.