RU2235176C1 - Method of door handle production and door handle - Google Patents

Abstract

FIELD: ironmongery, particularly door handles.

SUBSTANCE: production method for door handle having round cross-section includes cutting blank; shaping blank in two perpendicular planes to impart required shape to it; cooling blank after shaping; creating thread on handle ends for fastening member connection when assembling door handing. Door handle is formed of polyvinylchloride tubes. Blank shaping is carried out by two-step thermal shaping: the first step involves uniform heating blank up to 100-160^oC from each sides thereof and the second step includes shaping heated blank in forming apparatus. After that shaped blank is cooled, drawn out from forming apparatus, trimmed and thread is cut on ends thereof.

EFFECT: increased method simplicity.

11 cl, 16 dwg, 14 ex

Description

The invention relates to the field of manufacture of hardware and relates to a method for manufacturing a door handle from polymeric materials, and can be used in other areas to obtain various products.

A large number of methods for processing and manufacturing products from plastics are known.

For the preparation of products from thermoplastic pipes, a heated mandrel is known (patent RU No. 2015908, IPC ⁵ B 29 C 53/08, publ. July 15, 94), with the help of which large-sized products of simple shape are bent.

Its disadvantage is the impossibility of its use to obtain products of a given shape from pipes of small diameter and the described method of manufacturing products is used to manufacture products of only a simple form.

A known method of molding products from a plastic pipe, oriented in a circle or in two axes (patent RU No. 2037081, IPC ⁶ F 16 L 9/12, publ. June 9, 1995).

A method of forming a plastic pipe oriented in a circle or in two axes involves heating the plastic pipe to a temperature necessary for orientation, followed by orientation in the circumferential and axial directions.

The disadvantage of this method is its complexity and it is difficult to obtain products from pipes of complex configuration.

A known method of processing polymer materials into products by pressing using molds (author. Certificate. USSR No. 1479299, IPC ⁴ V 29 C 43/10, publ. 05/15/89). On the forming element, the product blank package is assembled and it is placed in the matrix, then the punch is lowered to the stop, the assembled mold is placed in a thermostat and heated to the molding temperature.

Its disadvantage is that it does not allow to process thermoplastic billets of the product from pipes into products of complex configuration.

The closest technical solution is the door handle and a method of manufacturing a door handle from a metal bar (PO No. 48622, MKPO 08-06, publ. 04/16/2001) by bending it mechanically after heating. The method consists in cutting billets from a metal bar of the required length, giving the billet the necessary shape after heating, cooling it after shaping, and then threading the ends of the supports to install the fastening elements.

The disadvantage of this method is that the method does not allow to obtain handles of complex configuration. Handles made of a metal bar with subsequent coloring have an unstable polymer coating.

The problem solved by the present invention is the development of a simple technological process for producing door handles, which allows to obtain handles of any shape of high quality with high strength.

The problem is solved by a method of manufacturing a door handle of circular cross section, including cutting blanks, giving the workpiece a given shape in two mutually perpendicular planes, cooling it after shaping, threading the ends of the handles for fasteners when installing door handles, as a material for door handles polyvinyl chloride pipes are used, giving the preform a given shape is carried out by thermoforming, which is carried out in two stages: in the first stage, the finished it tastes to a temperature of 100-160 ° C evenly from all sides, then, in the second stage, the preformed preform is formed in the molding device, after cooling, the molded door handle is removed from the molding device, trimmed in height and thread.

The outer diameter of the PVC pipes is preferably 30-32 mm, with a wall thickness of 5-7 mm.

PVC pipes are colored in bulk, preferably in white, black, brown, gray, which does not change with time.

The molding device consists of one matrix or two matrices, when closed, a space is formed that repeats the given shape of the handle.

After cooling the workpiece in a molding device consisting of two matrices, the upper matrix leans to the side.

The proposed method receive door handles of circular cross section having a given shape in two mutually perpendicular planes, including fasteners. Door handles are made of a PVC pipe, colored in bulk, of a given shape by thermoforming in a molding device.

Using a molding device consisting of one or two matrices, upon closing which a space is created that repeats the given shape of the handle, it is possible to obtain door handles of an original shape, preferably in the form of a bracket; in the form of an open equilateral triangle, consisting of two forming sides of the same length, formed at an obtuse angle; in the form of an open versatile triangle, consisting of two generatrix sides of different lengths, smoothly interconnected; in the form of an open triangle, consisting of two forming sides of the same length, formed at right angles; in the form of an open half ring turning into a straight section; in the form of an open semi-semi with a diverging section upwards; in the form of a smooth deflection to the side; in the form of a straight line; in the form of two smooth deflections in different directions; in the form of a hook shape; in the form of a semicircle elongated upward; in the shape of a horseshoe.

Door handles can additionally have at least one cylindrical support, which can be installed on all of the listed forms of door handles.

Preferably, the door handle has an additional one cylindrical support and a shape in the form of an open equilateral triangle, consisting of two forming sides of the same length, smoothly interconnected.

Preferably, the door handle has an additional one cylindrical support and a shape in the form of an open half ring, turning into a straight section.

Handles with an additional third cylindrical support and a large number of supports are installed on heavy and armored doors.

The quality of products made of polymer materials is determined by the appearance and performance indicators. According to the requirements for the appearance of products made of polymeric materials, namely door handles made of polyvinyl chloride pipes, they should be free of cracks, bubbles, chips, blisters, dark spots and other surface defects, since door handles are used as decorative elements of doors and other structures .

It is proposed to use PVC pipes as a material for the manufacture of pens, since this material is resistant to moisture, acids, alkalis, salt solutions, etc., and is highly durable.

The quality indicators of door handles made of polyvinyl chloride pipes are determined to a large extent by the conditions for their production: heat treatment and thermoforming modes, equipment design, configuration and size of the molding device.

Various quality indicators of products from polymers depend on their properties and the technology of their manufacture. The appearance of the door handles mainly depends on the processing conditions of the PVC pipes, and the mechanical strength, impact resistance, deformation properties are determined by their supramolecular structure, which, in turn, depends on the initial properties of the polyvinyl chloride, from which the PVC pipes are obtained, and on the technology further processing of polyvinyl chloride pipes.

The proposed solution proposes the use of simple technology for the manufacture of door handles while maintaining high quality in appearance and strength properties.

The proposed method for the manufacture of door handles includes the following operations and the conditions for their implementation:

- cutting blanks of PVC pipes of the required length;

- preheating the workpiece to a plastic state evenly from all sides. The heating temperature of the workpiece is in the range of 100-160 ° C. The preforms are heated so that the preform is uniformly heated throughout the entire thickness. Uneven heating leads to marriage: wrinkling, the desired shape of the handle does not work, etc. At the same time, when choosing equipment for heating, it is necessary to take into account the low thermal conductivity of polyvinyl chloride pipes. Therefore, the heating should not be intense, that is, the heating time is selected for each furnace in such a way as to create uniform heating at any point in the workpiece;

- carrying out the molding stage using a molding device consisting of one matrix, inside which there is a space repeating the given shape of the door handle, or from two matrices, inside which, when closed, a space is formed that repeats the given shape of the door handle. The joint of the matrices must be carefully adjusted, otherwise there will be traces of the joint on the door handle. In the form, a mechanical effect on the heated preform occurs. The operator manually performs the operations of placing the workpiece in the mold and removing the finished door handle after cooling;

- after molding, the door handle blank is sent for machining, trimmed in height, thread is made from both ends of the handle for its subsequent installation using fasteners to the door;

- carry out the assembly, cleaning, packaging and packaging of the finished door handle.

The proposed manufacturing method allows to obtain door handles of any shape. This is achieved using a specially made molding device for the manufacture of each given shape of the handle. The molding device consists of two dies. Each matrix has a forming space. After closing the matrices, a space is formed in the molding device, which determines the shape of the finished door handle. The molding device has a cylindrical or rectangular shape on the outside. The proposed molding device has a minimum number of components, therefore, it is reliable in operation. The molding device may consist of a single matrix with space for forming pens. In addition, the molding device may include holes for supplying cooling air.

Figure 1-12 shows a rear view of various forms of execution of the door handle. 13-14 show handles having an additional cylindrical support. On Fig shows a General view of the mount, and Fig.16 is a General view of a cylindrical support in assembled form.

The fastener for door handles 1 contains (Fig. 15) a threaded rod 2, washers 3, 4. The washer 3 has a central hole 5, and the washer 4 has a groove 6. The fastener for door handles 1 contains a sleeve 7 with an external right-hand thread and an internal left-hand thread , sleeve 8, with external right-hand thread and internal right-hand thread. The sleeve 8 has a rolled polyethylene ring 9. On the washer 4 there is an opening 10 for tightening with a lever while simultaneously butt-joining the right and left handles 1. On the stud 2 there is a bulge 11 located closer to the washer 4 with a groove 6 repeating the shape of the bulge 11.

The door handle may additionally contain at least one cylindrical support 12 with an opening 13 for connecting the support 12 to the handle 1 using a radius nut 14, a bolt 15 and a washer - 65 G (grover) 16 (Fig. 16).

Figure 1-14 shows a General view of the door handles on two and three supports. An additional cylindrical support 12 is made of metal (Fig. 16) and is installed at any distance from two other supports of the door handle (attachment points). An additional cylindrical support 12 is attached to the door handle 1 mechanically. In the door handle 1, holes are made for connection with an additional cylindrical support 12. The bolt 15 located in the support 12, through the washer - 65 G (grover) 16 passes through the hole 13 in the support 12 into the hole of the door handle 1 and is screwed into the radial nut 14, located in the cavity of the door handle 1. Next, an sleeve 7 or 8 is screwed into the end face of the additional cylindrical support 12.

Installation of door handles using the proposed fastening is carried out in the following way:

- measure the center distance of the door handle 1;

- drill holes with a diameter of 9 mm from the street and 13 mm from the premises;

- insert the pin 2 in the door so that the thickening 11 on the pin 2 is from the side of the room;

- from the side of the street put on a stud 2 a washer 3 with a hole in the center 5;

- substitute the handle 1, into the ends of which the bushings 7, 8 are screwed;

- screw the pin until the distance from the door surface to the end of the pin 2 becomes 42 mm;

- on the protruding studs 2 put on the washers 4 with a groove 6 in the center;

- put the door handle 1 to the studs 2 and with the help of the lever produce complete retraction of the handles;

- the side holes 10 in the washers 4 are sealed with a self-adhesive film, selected according to the color of the washer.

The following are examples of door handles.

Example 1

They take a PVC pipe with a diameter of 31.6 mm, cut a billet with a length of 640 mm and a thickness of 7 mm, place them in a furnace on a grate located in the middle of the furnace, evenly heated from all sides, heated to a temperature of 160 ° C, then the operator removes the workpiece from the furnace and transfers it to a molding device made of two matrices in which a recess in the form of a bracket is made, closes the matrix, holds for 10 minutes, after cooling, tilts the upper matrix to the side, removes the workpiece and sends it to the mechanical processing, the handle is trimmed in height, threads are made from both ends of the handle for its subsequent installation using fasteners to the door.

The resulting handle in the form of a bracket is convenient to use and successfully fits into the design of various architectural structures. The handle has a distance between the mounting axes (A) of 300 mm, a width (B) of 135 mm (Fig. 1). The pen is white.

Example 2

The door handle is made analogously to example 1, only differs in that the black blank (30 mm in diameter and 5 mm thick) is heated in a furnace to a temperature of 100 ° C. The handle has the shape of an open equilateral triangle, consisting of two forming sides of the same length, formed at an obtuse angle. The handle has a distance between the axis of attachment (A) 300 mm, width (B) 70 mm (figure 2). The pen has an original shape and fits well with the design of modern buildings.

Example 3

The door handle is made analogously to example 1, only it differs in that the handle has a gray color and a shape in the form of an open, versatile triangle, consisting of two forming sides of different lengths, smoothly interconnected. The pen also has an original look and is easy to use. The handle has a distance between the axis of attachment of 400 mm, a width of 80 mm (figure 3).

Example 4

The door handle is made analogously to example 1, only it differs in that the handle has a brown color and a shape in the form of an open triangle, consisting of two forming sides of the same length, formed at right angles. The handle has a distance between the axis of attachment of 300 mm, a width of 140 mm (figure 4).

Example 5

The door handle is made analogously to example 1, only differs in that the handle has a shape in the form of an open half ring turning into a straight section. The handle is distinguished by elegant execution and sophistication of form. The handle has a distance between the axis of attachment of 300 mm, a width of 230 mm (figure 5).

Example 6

The door handle is made analogously to example 1, only differs in that the handle has the shape of an open semi-floor with a diverging section upwards. The handle has a distance between the axis of attachment of 265 mm, a width of 70 mm (Fig.6). The door handle is installed on doors of various sizes and has wide application.

Example 7

The door handle is made analogously to example 1, only differs in that the molding device consists of one matrix, the handle has a shape in the form of a smooth deflection to the side. The handle has a classic look. The distance between the axes of attachment 265 mm, a width of 70 mm (Fig.7).

Example 8

The door handle is made analogously to example 1, only differs in that the handle has the shape of a straight line. The pen also has a classic look, so it is widely used. The handle has a distance between the attachment axes of 600 mm (Fig. 8).

Example 9

The door handle is made analogously to example 1, only differs in that the handle has a shape in the form of two smooth deflections in different directions. The handle has a distance between the axis of attachment of 486 mm, a width of 130 mm (Fig.9). The model differs in its original form.

Example 10

The door handle is made analogously to example 1, only differs in that the handle has a shape in the form of a hook shape. The handle is made in modern style. The handle has a distance between the axis of attachment of 400 mm, a width of 135 mm (figure 10).

Example 11

The door handle is made analogously to example 1, only differs in that the handle has a shape in the form of a semicircle elongated upward. The handle is also made in modern style. The handle has a distance between the axes of attachment of 250 mm, a width of 170 mm (11).

Example 12

The door handle is made analogously to example 1, only differs in that the handle has the shape of a horseshoe. The handle is distinguished by its original design. Installed on small-sized doors. The handle has a distance between the axes of attachment 135 mm, a width of 180 mm (Fig).

Example 13

The door handle is made analogously to example 1, only differs in that the handle has a shape in the form of an open equilateral triangle, consisting of two forming sides of the same length, smoothly interconnected and has an additional third cylindrical support. Preferably, the handle is mounted on heavy and armored doors. The handle has a distance between the axes of attachment of 400 mm, a width of 185 mm (Fig.13).

Example 14

The door handle is made analogously to example 1, only differs in that the handle has the shape of an open half ring (turning into a straight section) and has an additional third cylindrical support. It is also used for heavy and armored doors. The handle has a distance between the attachment axes of 300 mm, a width of 230 mm (Fig. 14).

All listed door handles have a height (C) from 80 to 120 mm.

The claimed door handle can be made in mass production using equipment for processing plastics, with little capital investment and simple technology. The proposed door handle has a modern appearance and has high strength.

Claims (11)

1. A method of manufacturing a door handle of circular cross section, including cutting blanks, shaping the workpiece in two mutually perpendicular planes, cooling it after shaping, threading the ends of the handles for fasteners when installing door handles, characterized in that as the material for the handles PVC pipes are used for the door, giving the preform a given shape is carried out by thermoforming, which is carried out in two stages: in the first stage, the preform is heated to a temperature 100-160 ° C evenly from all sides, then in the second stage, the pre-heated preform is formed in the molding device, after cooling, the molded door handle is removed from the molding device, trimmed in height and thread. 2. The method according to claim 1, characterized in that the outer diameter of the polyvinyl chloride pipes is 30-32 mm with a wall thickness of 5-7 mm. 3. The method according to claim 1, characterized in that the PVC pipes are colored in bulk in white, black, brown, gray. 4. The method according to claim 1, characterized in that the molding device consists of one matrix. 5. The method according to claim 1, characterized in that the molding device consists of two matrices, when closed, a space is formed that repeats the given shape of the handle. 6. The method according to claim 5, characterized in that after cooling the upper matrix is folded to the side. 7. A door handle of circular cross section having a predetermined shape in two mutually perpendicular planes, including fasteners, characterized in that it is made of a polyvinyl chloride pipe, colored in bulk, of a given shape by thermoforming in a molding device. 8. The door handle according to claim 7, characterized in that it has a shape in the form of a bracket, in the form of an open equilateral triangle, consisting of two forming sides of the same length, formed at an obtuse angle, in the form of an open different-sided triangle, consisting of two forming sides of different lengths smoothly interconnected, in the form of an open triangle, consisting of two generatrices of the same length, formed at right angles, in the form of an open half ring turning into a straight section, in the form of an open oluovala upwardly diverging portion in a smooth bending in the direction of the straight, in the form of two deflections flowing in different directions, in the form of hook-like shape, elongate in a direction upward half-ring, in the form of a horseshoe. 9. The door handle according to claim 7 or 8, characterized in that it additionally has at least one cylindrical support. 10. The door handle according to claim 9, characterized in that it additionally has one cylindrical support and a shape in the form of an open equilateral triangle, consisting of two forming sides of the same length, smoothly interconnected. 11. The door handle according to claim 9, characterized in that it additionally has one cylindrical support and a shape in the form of an open half ring turning into a straight section.

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