CZ25834U1 - Interior door - Google Patents

Description

The Industrial Property Office does not ascertain in the registration procedure whether the subject of the utility model meets the conditions of eligibility for protection pursuant to Section 1 of Act no. No. 478/1992 Coll.

Interior door

Technical field

The technical solution relates to interior doors with metal frames, especially for use in exposed areas.

BACKGROUND OF THE INVENTION

Previously used interior doors with standard metal doorframes consist of a frame construction, which is mostly made of solid spruce prism and filling material, which is standardly a paper honeycomb, chipboard, etc. From the outside, the chipboard is glued and pressed onto the frame. This semi-finished product forms a door. The door is further machined, made fale and externally sheathed with the material that forms the final door surface. Natural or artificial materials are used for cladding. These are so-called veneer splice, various types of foils with different types of decors and mechanical resistance, or format board materials used in furniture. The final surface of the door can also be achieved by surface treatment, spraying. An edge is glued in the door seam - ie from both longitudinal sides and from the top. The underside of the door is usually impregnated. The door is fitted with metal parts - locks and hinges.

When used in exposed areas, existing interior doors are not able to withstand atmospheric humidity above 60% and cannot be used in areas where door sanitation, water jet cleaning or similar type of maintenance is required, while retaining the possibility of fitting into metal frame building enclosures. These doors are soon damaged and their frequent replacement increases the cost of operating exposed interiors.

The essence of the technical solution

The above-mentioned disadvantages eliminate interior doors fitted into metal doorframes, consisting of a door with a frame, panels and side panels, according to the technical solution, which is based on a hard plastic material, extruded polystyrene frame panel and acrylonitrile side panel. butadiene of a styrene polymer, wherein all materials are joined by pressing and gluing. The essence is also that the plastic material of the door frame is an expanded modified polystyrene of wood hardness, or a material based on wood fiber and polymer or hard polyurethane. It is also important that a molding flap is formed directly in the door frame or a molding flap of plastic material is glued to the door frame.

The advantage of interior doors made of new materials according to the technical solution lies mainly in that they are intended for common metal doorframes and at the same time made of modern water-resistant and steam resistant materials with low weight and excellent thermal insulation properties. The combination of these materials into a compact product results in new doors that also resist the effects of other non-aggressive operating substances, oils and lubricants, disinfectant solutions, detergents, etc. The doors are developed primarily for exposed areas - workshop and service operations, food processing, health and home social services, canteens, slaughterhouses. The interior plastic doors are mainly designed for use in exposed plants with high dust, air humidity, for operations with maintenance requirements by pressure spraying and washing with detergents and disinfectants, degreasers etc. The doors do not twist, rot, do not dry and are not absorbent. The door has comfortable thermal insulation properties and low weight. Another indisputable advantage is favorable price calculation of the product.

Overview of the drawings

The interior door according to the new technical solution is shown in section in the drawing, in which Fig. 1 represents a section through a door, Fig. 2 shows a section through a door with a hinge formed directly in the frame;

Examples of technical solution

The supporting structure of the door door is a frame 1, which is made of a hard plastic material. The construction of the frame 1 is rectangular with a reinforcement on hinges and hinges with one cross member. The door panel filling 2 consists of two precisely formatted and tightly embedded parts made of extruded polystyrene material, known for example under the trademark PENOPOL. Extruded polystyrene is characterized by high strength, low bulk density and almost zero water absorption. This structure is only sheathed from the front and back by precisely formatted plates 3, 4 of acrylonitrile-butadiene styrene polymer, known by the abbreviation ABS. The molding flange 5.1 is formed directly in the plastic frame 1, after all parts have been pressed and glued together, or the molding flange 5.2 of plastic material is glued to the door frame 1.

Pressing with backing is used for the door cladding. All joints are glued with strength glue. The doors are, like the existing ones, fitted with metal parts - lock and hinges, identical for use in standard interior doors. These plastic interior doors can also be fitted with security and panic fittings, self-closing devices, electromagnetic locks and other security components. In these interior doors can be solved replacements glazing. The cut into the finished door is made in the existing way, instead of the glass sheet is plexiglass and the frame is made of plastic profile. The cut is made in such a way that the design of the door frame is not impaired.

A number of suitable materials can be used as the hard plastic from which the door frame 1 is made. Preferably, it is an expanded polystyrene profile, such as the plastic marketed under the brand name "Evewood". Another material is a product based on wood fiber and high-quality polymer, for example known as WPC. A suitable semi-finished product for the frame is also a material based on hard polyurethane. It is a material supplied under the PURENIT brand, which is made partly from ground polyurethane recycled material with the addition of polyisocyanurate and the necessary reagents. This product is then pressed to the desired thickness using flat presses and then ground as required. All of the above materials are resistant to chemicals, resistant to high temperatures, humidity, without swelling and cracking, has high compressive strength and excellent thermal insulation properties.

ABS material is sold under various trade names, eg POLYLAC, MAGNUM, CYCOLAC, etc. ABS boards are 2 mm thick, with the format of the front door part format different from that of the rear seam back side. ABS has higher impact and notch toughness - especially at minus values, it absorbs shock and vibration well. The fatigue limit is relatively low and has higher temperature and shape stability than other styrenic plastics

Industrial applicability

Interior doors are particularly useful for a variety of operations, ABS material for the front of the casing and the seams of the door is advantageously used in four basic color lines, which directly specify the use:

gray color - for cellar and attic space of houses and business premises, red color - for operations such as meat, slaughterhouse, canteens, food industry, blue color - for workshop and service premises, white color - for health care facilities, social service homes.

Other color shades are used based on specific customer requirements.

PROTECTION REQUIREMENTS

Claims (6)

Interior door with a metal door frame, with a door, consists of a frame, panels and side panels, characterized in that the door frame (1) is made of a hard plastic mateCZ 25834 U1 rial, the panel frame (2) is extruded polystyrene and side plates (3, 4) of acrylonitrile-butadiene styrene polymer, all of which are joined by pressing and gluing. Interior door according to claim 1, characterized in that the plastic material of the door frame (1) is a blown modified polystyrene of wood hardness. 5 Interior door according to claim 1, characterized in that the plastic material of the door frame (1) is a wood fiber and polymer based material. Interior door according to claim 1, characterized in that the plastic material of the frame (1) is based on hard polyurethane. Interior door according to one of Claims 1 to 4, characterized in that a molded flange (5.1) is formed directly in the door frame (1). Interior door according to one of Claims 1 to 4, characterized in that a molded plastic (5.2) is glued to the door frame (1). 1 drawing -3GB 25834 U1