RS964U - BENDING MACHINE FOR ALUMINUM AND PVC PROFILES - Google Patents

Abstract

Machine for bending of aluminum and PVC profiles having a control and control system, characterized in that a motor gearbox (7) is vertically mounted in the inner part of the base (10) by a shaft connected to the coupled gears (8, 19) and to two axles, mounted in bearings in the housing (l8), on which two plastic profiled rollers (1) are mounted fixedly and in both directions with a washer (3) and a nut (4) for clamping the profile (23) in a plastic tool (24) on the upper part, which there is a horizontally mounted motor gear (21) connected to the stand (10) by a threaded spindle (9) with a linearly movable plate (17) at the end of which there is a housing (20) with shaft bearings with a rotating plastic roller (2) with the upper the part provided with a washer (6) and a nut (5) for clamping the profile (23) in a plastic tool (22) and having at least two hot air dryers (11) directed on the stand (10) directed towards the PVC profile (23). The application contains 1 more independent patent claim.

Description

Technical field to which the invention relates

The subject of the invention relates to the bending of pipes, rods or profiles, more precisely by the invention between rollers, as well as to the field of auxiliary equipment, e.g. for heating or cooling bent parts, and bending areas adapted for special objects.

According to the International Classification of Patents, the subject of the invention is marked with classification symbols (<7>) B21D 7/00, B21D 7/08, B21D 7/16 and B21D 11/00.

Technical problem

The technical problem that is solved by this invention consists in how to construct a machine for bending aluminum and PVC profiles, while preserving the dimensions and appearance of the profile, using two fixed rotating rollers and one rotating roller with rectilinear movement driven by two motor reducers and installed hair dryers for heating with hot air for softening and easier bending of profiles that are filled with quartz sand.

State of the art

Until now, the bending of PVC profiles mainly took place on different constructions of work tables, on which arced stops are placed, between which PVC profiles are placed, which are preheated in glycerine oil, which brings them to a doughy state and subsequently cools them. With existing machines, profile bending is done from one pass, which has a negative impact on quality, because the internal forces that tend to return the profile to its original position are much greater compared to the proposed solution where bending takes place from several passes, because the bending process takes place gradually with continuous heating with hot air dryers. The disadvantage of the known machines is that they are limited to a profile length of up to 3 m, while the new solution can bend profiles up to 6.5 m long, and profiles with inserted steel reinforcement, which is necessary to maintain the strength of PVC profiles used for making doors, windows and other products, can also be bent.

A new constructive solution with bending using rollers and installed hot air dryers instead of hot glycerine oil, which needs to be changed often, and which was replaced with quartz sand, contributed to the improvement of the quality and speed of profile production, which was also reflected in the three times lower cost compared to the existing machines.

By searching the patent documentation and reviewing the professional literature, as well as by looking at the market, no similar solution to the technical problem was found.

Exposition of the essence of the invention

The machine, according to the invention, solves a completely new way of bending aluminum and PVC profiles, as well as PVC profiles with inserted steel reinforcements. This was achieved by means of three plastic profiled rollers, driven by two motor reducers. Two rollers are fixed and rotating, while the third roller is also rotatable in both directions around the axis, but at the same time it is over the threaded spindle, i.e. the spindle connected to the moving plate is moved in a straight line back and forth and by its gradual movement towards the profile it performs gradual bending in cooperation with two fixed rotating rollers. The machine is equipped with hot air dryers that heat the PVC profile, softening it for easier and better bending. Hot air dryers are not used when bending aluminum profiles.

Brief description of the draft images

The invention is described in detail on the basis of the embodiment shown in the drawing in which:

- picture 1 - shows the subject machine seen from the front, i.e. from the front,

- picture 2 - shows the machine in a side view,

- picture 3 - shows the machine from above,

- picture 4 - shows the section of the plastic tool and the PVC profile that presses the rectilinear moving roller i

- picture 5 - shows a section of a plastic tool and a PVC profile that passes between two rotating rollers.

Detailed description of the invention

The subject invention relates to a machine for bending aluminum and PVC profiles, as well as PVC profiles with inserted steel reinforcement. It is a compact unit and consists of a base 10 on which the driving, working and auxiliary devices and their elements, as well as the management and control system, are structurally and functionally placed and connected. The motor reducer 7, placed vertically in the inner part of the base 10, is connected via a shaft to the coupled gears 8, 19 located in the bearings in the housing 18 and is used to turn in both directions two fixed plastic profiled rollers 1, on the upper ends of which there are metal washers 3 that clamp the profile 23 in the plastic tool 24 with the help of a nut 4. The drive of the motor reducer 7 is realized by pressing keys 13 and 15. The motor reducer 21 is placed horizontally on the base 10 and is connected by a threaded spindle (called a spindle) to the moving plate 17, on which there is a nut 16 on the front part, while the rear part is connected to the housing 20 with bearings in which the shaft rotates with a wedged rotating plastic profiled roller 2. By pressing the buttons 12 and 14, the motor reducer 21 is driven, which via of the threaded spindle 9 rectilinearly moves the movable plate back and forth towards the profile 23 and at the same time enables rotation of the roller 2 in both directions. On the roller 2 there is a steel washer 6 and a nut 5 for tightening the profile 23 in the plastic tool 22. On the base 10 of the machine, two or three hot air dryers 11 are placed, depending on the size and capacity, which are used to heat the PVC profiles in order to soften them for easier bending. When bending aluminum profiles, hair dryers 11 for hot air are not used.

The functioning of the machine and the bending procedure is very simple and begins with the preparation of the appropriate profile, which consists of the calculation of the lengths of the bending zones and the size of the bending arc, which determine the length of the profile itself. After that, the profile 23 is filled with quartz sand 25, which is secured from falling out by placing plugs on both ends of the profile 23 and is placed on the upper surface of the base 10 between two plastic profiled rollers 1 and plastic profiled roller 2 and is fixed by clamping with washer 3 and nut 4 on plastic tool 24, or washer 6 and nut 5 on plastic tool 22. Bending profile 23 starts by starting motor-reducer 7 by pressing buttons 13 and 15 and by starting motor-reductor 21 by pressing buttons 12 and 14 while simultaneously turning on fans 11 for hot air that are at a distance of 80 to 150 mm from profile 23, depending on the diameter of the arc being bent. The temperature of the hot air directed towards the profile 23 is up to 150 °C, which is enough to soften the profile 23 without deforming it. The motor reducer 7 via the gear coupling 8, 19 drives and rotates the two rollers 1 at a speed of 20-30 °/min, and at the same time the motor reducer 21 via the threaded spindle 9 gradually moves the rectilinear moving plate 17 with the roller 2 towards the profile 23 at a speed of 0.8 to 1 mm/sec and thus the bending begins, which lasts until a suitable arc is obtained. The bent profile 23 is removed from the machine and cooled to room temperature, after which the sand 25 is thrown out, and the profile is cleaned and wiped and stored on appropriate shelves. The procedure for bending aluminum profiles on the machine is exactly the same as for bending PVC profiles, with the exception that hair dryers 11 for hot air are not used.

Claims (1)

1. A machine for bending aluminum and PVC profiles, which has a management and control system, characterized by the fact that in the inner part of the base (10) there is a vertically placed motor-reductor (7) connected by a shaft to coupled gears (8, 19) and to two shafts, placed in bearings in the housing (18), on which two plastic profiled rollers (1) are fixed and rotatable in both directions. washer (3) and nut (4) for clamping the profile (23) in the plastic tool (24), which is a motor reducer (21) placed horizontally on the base (10) connected by a threaded spindle (9) to a rectilinear moving plate (17) at the end of which there is a housing (20) with bearings for accommodating the shaft with a rotating plastic profiled roller (2) with a washer (6) located in the upper part and with a nut (5) for clamping the profile (23) in the plastic tool (22) and that at least two hot air dryers (11) directed towards the PVC profile (23) are placed on the base (10).