Make plastic doors

When you hear “make plastic doors?”, many people think that it’s simple: order a profile, fittings, cut it, assemble it - and you’re done. In fact, this is exactly the point where all the problems for beginners begin. I went through this myself. Everything seems to be standard, but then it turns out that the sash “plays”, the seal does not press, and after a year the fittings have become loose. And the client is unhappy. This is where the difference between assembly and real manufacturing is visible - with an understanding of the physics of the design, the behavior of materials and, critically, installation in different conditions.

Where does production actually begin?

The first and most important thing is not the profile, but the technical specification. Or rather, its decoding. The client says: “We need a door to the loggia so that the heat doesn’t escape or blow.” Sounds simple. But what kind of loggia? Panel house with a crooked opening? Or a new building with ideal geometries? North side with constant wind or sunny side where the PVC will get very hot? Whether there is a powerful heating radiator nearby - this is the thermal load on the frame. Each such nuance changes the approach to choosing a profile system, glass thickness, type of seals and even reinforcement.

For example, there was a case for an object in a coastal area. The customer wanted a standard white door. But knowing that there is salty air and high humidity, we insisted on a profile with reinforced coating and fittings with a higher corrosion resistance class. And we separately discussed the drainage holes - so that they are correctly located and do not become clogged. Three years later we received gratitude from him - the neighbors who installed “what was cheaper?” already had stains and smudges on the fittings. And his is like new. This is manufacturing: not just assembling, but designing to suit the conditions.

By the way, about the profile. There is a lot of controversy around intimacy and width. A 70 mm five-chamber profile is not always better than a 60 mm three-chamber profile. It all depends on the system manufacturer, the quality of the raw materials and the accuracy of the extrusion. I saw samples where "fat" The partition profile is thin, and the geometry “walks”. And vice versa. Therefore, for example, we tested several systems for a long time before settling on two proven suppliers. And we use different systems for different tasks. For a warm circuit - one, for internal partitions - another, lighter and more economical.

Fittings: hidden door frame

If the profile is the skeleton, then the fittings are the joints and ligaments. The biggest mistake is to skimp on it. I remember at the dawn of our activity they tried to put more affordable fittings on a good-quality frame. Everything worked, but after six months or a year squeaks began, adjustments did not hold, and the hinges became loose. I had to redo it at my own expense - the lesson turned out to be expensive.

Now we work mainly with well-known German and Austrian brands. But here, too, not everything is clear. Each line of fittings has its own “character”: one is better for heavy sashes, the other for frequent intensive opening, the third has special anti-burglary elements. Selection is part of the processmake plastic doors. It is necessary to take into account the weight of the sash (the double-glazed window can be double-chamber, energy-saving), its dimensions, and the opening direction.

Installation of fittings is especially important. It is not enough to simply screw the hinges according to the markings. You need to understand how the load will be distributed, how to adjust the sash pressure in different climatic seasons. Often, when measuring, I already make small adjustments to the dimensions so that the sash fits perfectly under a specific fitting scheme, without unnecessary stress on the frame.

A double-glazed window is not just “glass”

For many clients, a double-glazed window is simply “glass in a frame”. In fact, this is the most important element in terms of thermal insulation and noise protection. And there are a lot of options here. Single or double chamber? Which spacer frame is aluminum or warm? Filling with inert gas? What type of glass - regular, tempered, multifunctional?

Whenproduction of plastic doorsFor a private house in a cold region, we somehow made a door with double-glazed windows () with argon filling and i-glass. The client initially doubted the feasibility. But after the first winter, he noticed that the “cold feeling” near the door stopped, and the condensation that used to be on the old door completely disappeared. This is a clear result of correct calculation.

But there are also opposite examples. For an office center with high traffic, we installed doors with beautiful double-glazed windows with patterned glass. But they did not fully take into account the impact load. As a result, the glass cracked in one place due to an accidental strong blow from the cart. I had to urgently change to triplex. Now for commercial properties, a double glazing unit with tempered glass or triplex is a mandatory condition in our specification.

Assembly and control: where quality is born

The assembly shop is where all the components meet. And every little detail is important here. Temperature in the workshop, cleanliness, precision of profile cutting at 45 degrees, quality of welds. A poorly cleaned profile will produce an unsightly and weak seam. Incorrect installation of reinforcement inside the profile will lead to the frame “moving?” over time.

We had a stage when they tried to speed up the process by entrusting the cutting to a new automatic machine without proper running-in of the operator. As a result, the batch of profiles came with microscopic deviations in the corners. During assembly, this resulted in small but noticeable gaps in the corner joints after welding. The whole marriage went to waste. Now there is control at every stage: acceptance of the profile, cutting, milling of grooves for fittings, welding, cleaning of seams, installation of seals and fittings. Each door is checked for evenness of diagonals, ease of movement of the leaf, and tightness of pressure.

Particular attention is paid to drainage and drainage channels. Their improper milling is a common cause of future leaks and freezing. We have developed our template based on typical and atypical installation situations that minimize risks.

Installation: the result of all the work

You canmake plastic doorsimpeccable quality, but spoil everything during installation. Installation is 50% of success. And here comes the fun part: real objects. There are no ideal openings. You need to be able to align them, use mounting plates and anchors correctly, without over-tightening the frame. Be sure to use professional polyurethane foam with low expansion pressure, otherwise the frame will move.

One of the key points is steam and waterproofing of the seam. Often it is neglected, sealing the foam only with plaster. This is a recipe for the foam to become damp and collapse. We always use a three-layer system: foam, then on the outside - waterproofing tape or mastic, and on the inside - vapor barrier. This guarantees durability.

After installation, adjustment is required. The door should open and close with one finger, without effort. The pressure on the sash should be uniform around the entire perimeter. This is what we teach all our installers. And we always leave the client with instructions for seasonal adjustments - does metal-plastic “breathe?” from hot to cold, and a little adjustment of the fittings is normal.

A look towards related materials

While working on doors, you are constantly faced with requests for other products. Clients ask about wooden windows and interior doors. Here, by the way, the difference in approaches is visible. If in plastic a lot depends on the precision of engineering and assembly, then in wood it depends on the feeling of the material and processing. There are interesting offers on the market, for example, from the companyAnhui Wantai Woodworking Co.,Ltd. If you look at their websitehttps://www.anhuiwantai.ru, it is clear that they are focusing on the aesthetics and practicality of wooden doors for the global market. They have modern production and, what is important, control at all stages - from raw materials to production. Their principle is “to build a business on precision, to win with quality?” very close to what we strive for when working with plastic, although the materials are different. Sometimes you think that the right approach to business, be itproduction of plastic doorsor wooden, lies in the same things: understanding of the material, attention to detail and rigorous control.

At the end of the day, whether it's plastic, wood or aluminum, the product should solve a customer's problem for years to come. And when, after several seasons, feedback comes that “the door works like a clock, no problems?”, you understand that all these nuances, selections and even past mistakes were not in vain. This is the real result of the work.