Comparison of Casting and Striping in Aluminum Broken Bridge Doors and Windows

[China Aluminum Industry Network] With the development of economy, the improvement of the manufacturing technology level, the emphasis on green manufacturing and product energy-saving emission reduction has become the trend of the times. Looking at the construction industry, doors and windows as an inseparable part of the building have become the focus of attention on the green process in the manufacturing process. Among them, the tightness and heat preservation of doors and windows are an important part of energy-saving design. Now the door and window industry in the use of thermal insulation broken bridge windows, which thermal break bridge windows in the form is divided into two types: one is a pouring type, one is wearing a strip type. Then analyze the contrast between the pouring type and the wear type performance performance from several aspects.


On the left is the right side of the strip for pouring

Production process comparison

In the comparison of production processes, the process of wearing strip-type heat insulation aluminum profiles is more complicated than casting. Wearing strips of heat insulation aluminum generally separate teeth, wear strips, rolling three processes. The pouring type can directly move the surface-treated aluminum profile through a linear motion of the walking system, so that when the heat insulation groove of the aluminum profile passes under the pouring head of the pouring machine, the liquid heat insulation material flows into the heat insulation groove, and after a period of time After solidification, cut the bridge.


Cost comparison

If the costs of the two are viewed from the perspective of the consumer, due to the differences in the design and size of the cast insulation structure and the crossbar insulation structure, the aluminum material size a is at least 4mm smaller than b. Thus, in the same cavity Under the premise of design and the same wall thickness, the weight of cast aluminum insulation is less than the weight of insulation aluminum. For the insulated aluminum windows with the same design and the same insulating glass configuration, the weight of the cast aluminum window is much lower than that of the threaded aluminum window. For the unit price of square meters of insulated aluminum windows, weight is a crucial factor. Since the weight of the cast insulated aluminum window is lower than the weight of the threaded aluminum insulating window, its cost price is also much lower than that of the threaded aluminum insulating window. Analytical pricing was performed according to the size of a standard sample window of 1500mm x 1500mm. As a result, it was found that the cost of the cast insulated window is about 20% lower than the cost of the aluminum material of the string insulated window.

However, from the point of view of the producer, the wearing equipment is divided into two types, imported equipment and domestic equipment. Imported equipment is generally from Germany or Switzerland, of which Swiss Muller, for example, a set of equipment including open gear, threading machine, rolling machine and testing machine, the overall set of at least about 800,000. There are many manufacturers of domestic equipment, and the price is not very standard, roughly between 20 to 50 million.

Casting process is a kind of equipment and glue inseparable technology, so the manufacturers of equipment and insulation rubber manufacturers are basically the same, the main import Ya Song, the equipment is shipped to the United States in the production of high cost, I At about 1.4 million, Class II is about 700,000. The mixing ratio of the two raw materials is fixed so that the manufacturer must use its raw materials, otherwise it cannot work and has poor versatility. Domestic equipment, Dalian Lianshi Technology Co., Ltd. produced equipment on the basis of the same basic principle, made a major change, the more critical point is that all actions by the computer control, matching, temperature can be adjusted according to need. With the initiative, users can choose more suitable raw material suppliers. The price is generally between 300,000 and 400,000.

Thermal insulation

When it comes to insulation performance, it is necessary to first understand the insulation materials used between the two. The heat-insulating material of the “striping process” is a heat-insulating bar. The current regular heat-insulating bar is a polyamide 66. The current insulation material of the "pouring process" is mainly polyurethane heat-insulating adhesive, and its composition is generally composed of a resin component and an isocyanate component. Polyamide 66 also known as nylon 66, nylon 66 high fatigue strength and rigidity, good heat resistance, low friction coefficient, good wear resistance, but large moisture absorption, dimensional stability is not enough. Polyurethane heat insulation adhesive has high tensile strength, excellent elasticity, abrasion resistance, oil resistance and cold resistance, but its water resistance, especially its alkali resistance, is not good. Relatively speaking, the price is reasonable and it is also the advantage of polyurethane heat insulation adhesive. one.

In contrast, pouring profiles have been in existence for more than 30 years. Poured insulation systems have been widely used in residential and commercial residential buildings. They are of high quality, energy-efficient, and are constantly known, understood, and accepted in the industry. As the status continues to climb, the number of applications in the market is rapidly increasing. Compared with the strip type, cast insulation products are easier to produce and the unit cost is more economical.

According to the test, if the same structure is used to make the same 45mm inner window (1500mm × 1500mm), according to the experimental results, under the premise of the width of the door and window profile, the glass system configuration and the width of the insulation material are the same, the pouring interval The heat insulation performance of the hot window is obviously better than that of the heat insulation window.

to sum up

By comparison, we can see that the "pouring process" is slightly better than the "striping process" in terms of economy and applicability, but in fact, both the "striping process" and the "pouring process" are both very good. Insulation performance is the development direction of energy-saving aluminum alloy building materials. What can be clear is the market for thermal insulation and energy-saving profiles, especially the application of energy-saving doors and windows will be faster and faster. Correspondingly, the "striping process" and "pouring process" will follow the development of energy-saving doors and windows, both of which will provide clear choices for our consumers to purchase energy-saving doors and windows.

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