WO2019130332A1

WO2019130332A1 - Automated acrylic bending and arbitrary angle laser

Info

Publication number: WO2019130332A1
Application number: PCT/IN2018/050151
Authority: WO
Inventors: Pankaj Kumar; Arvind NAHAR
Original assignee: Pankaj Kumar; Nahar Arvind
Priority date: 2017-12-25
Filing date: 2018-03-16
Publication date: 2019-07-04

Abstract

Automated acrylic bending and arbitrary angle laser cutting machine is an automated acrylic bending and arbitrary-angle laser cutting machine. This machine mainly consists of arbitrary angle laser cutting tool and acrylic bending tool. This machine takes acrylic sheet as raw material. The sheet is cut into strips and front. To make 3D acrylic letter the sheet is to be bent and stick on boundary of front. The strips are inserted to bending tool which bends the acrylic sheet in desired pattern. The bend strips are stick over front to make complete letter.

Description

FIELD OF THE INVENTION

Automated Acrylic bending and arbitrary angle laser.

BACKGROUND OF THE INVENTION

In traditional methods of getting the desired shaped acrylic strips, specific tools are used. These tools have heaters in them, and the acrylic is heated. When^’ the temperature of acrylic in specified region approaches above the forming temperature, the acrylic is taken off and formed by hand in desired pattern. This takes about 30 seconds to heat and after forming it has to be cooled. The formed region is on hold for a time to let it cool. This process is repeated several times until the shape is completed by moving forward. This is time consuming and not so finished. All the available traditional solutions are manual. While in laser cutting machine only normal direction cutting is available.

SUMMARY OF THE INVENTION

In this machine the acrylic is formed with special designed tools which have heating and cooling facility. This maintains required performing and post forming conditions. Tools are selected and operated as per calculations and commands. The cutting can be done at any arbitrary angle from normal axis.

PRIOR ART

This application is not related with any prior art available in the market. There is no such mechanism available in market by which acrylic or any other polymer material can be molded in desired shape through PLC automation.

OBJECTS OF THE INVENTION All the available traditional solutions are manual. This is time consuming and not so finished. Due to the time factor the cost increases. In this invention the acrylic is heated faster andafter forming cooled by the chilled coolant. Due to digitally controlled trajectory path, the more accurate shape is generated. Also the feed is automated, so the measurement and handling time is reduced. Also laser cutting at angle is provided.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows front view of automated acrylic bending and arbitrary angle laser cutting machine.

Fig. 2 shows side view of automated acrylic bending and arbitrary angle laser cutting machine.

Fig. 3 shows side view of arbitrary-angle laser cutting tool.

Fig. 4 shows isometric-bottom view of arbitrary-angle laser cutting tool.

Fig. 5 shows isometric-top view of mirror assembly.

Fig.6 shows isometric top view of acrylic bending tool.

Fig.7 shows mid plane sectional side view of acrylic bending tool.

DETAILED DESCRIPTION OF THE VARIOUS EMBODIMENTS OF THE INVENTION

Automated acrylic bending and arbitrary angle laser cutting machine 1 is mainly consisting of two tool assemblies. One is arbitrary angle laser cutting tool 2 and other is acrylic forming or bending tool 3 as shown in fig.l.

Arbitrary angle laser cutting tool 2 makes the sharp angle cuts for sharp corners and joints. As laser can only reflect at angle 90 degree efficiently, it is decided to get defined angle inclination in laser beam 23 is by rotating the reflecting mirror 82 about the incident ray’s axis 81. This is done twice about both X 12 and Y axis 14 as shown in fig. 3&4. This tool mainly consists of main bracket 11, mirror assemblies 22&15, motors 16&22, and lenses 13 as shown in 3, 4, &5. The laser beam 23 incident on mirror assembly_l 22 parallel to X axis and reflect to 90 degree and incident on mirror assembly _2 15. After incident on mirror assembly_2 15 the laser beam reflect at 90 degree again and beam passes through the axis of the focusing lenses 13. The mirror assemblies are rotated about the incident beam. This leads to give the laser beam vertically absolute angles about x and y. The mirror assemblies are rotated with the motors 21&16.

After cutting the acrylic strips, the bending is done by bending tool 3 as shown in figure 6 & 7. The bending tool consist of feeding rollers 44, supporting rollers 46, front rollers 42, feeding rollers 45, bending rollers 44, hot air injection 47, motorl 41, motor2 41,coolent spray port 48, driving gear 43 and driven gear 51. The motors are controlled by the computer. The feeding rollers feed 45 the acrylic strip forward in controlled manner. In between the supporting rollers 46 the hot air at very high temperature is passed around the acrylic strip it heats it up. After the heating process the strip goes through the front rollers 42 and bending rollers 44, where the strips is bent at controlled angle after bending the cooling is gone through coolant spray port 48. The strip after bending is cut by the laser. When the all needed strips are made all are joined manually by the bond. This makes the bending autonomous and fast process with accuracy.

Claims

1. Automated acrylic bending and arbitrary angle laser cutting machine consist of

a. Arbitrary angle laser cutting tool (fig 3,4&5)

b. Acrylic bending tool (fig 6&7 )

2. Automated acrylic bending and arbitrary angle laser cutting machine as claimed in claim 1 wherein said the arbitrary angle laser cutting tool (figure 3&4) is provided with two mirrors in mirror assemblies (figure) to adjust the two angles about X and Y axis. The light from source comes and incident on 1^st mirror assembly and reflected toward 2^nd mirror assembly which again reflects the incident beam downward. The mirrors tilted at 45 degree in mirror assembly are rotated about incident axis to get the desired angles of cutting beam from x and y axis as in figure 5 and 4.

3. Automated acrylic bending and arbitrary angle laser cutting machine as claimed in claim 1 wherein said the acrylic bending tool is used to bend or form the acrylic strip in desired shape.

4. Automated acrylic bending and arbitrary angle laser cutting machine as claimed in claim 2 wherein said laser beam incident on mirror assembly 1 parallel to X axis and reflect to 90 degree and incident on mirror assembly 2. After incident on mirror assembly 2 the laser beam reflect at 90 degree again and beam passes through the axis of the focusing lenses. The mirror assemblies are rotated about the incident beam. This leads to give the laser beam vertically absolute angles about x and y. The mirror assemblies are rotated with the motor 1 & 2.

5. Automated acrylic bending and arbitrary angle laser cutting machine as claimed in claim 2 wherein said the mirror assembly 1 and the mirror assembly 2 (figure 5) are rotating about incident ray to give an arbitrary angle to reflected ray. The rotation is feed by the motor 1 and motor 2 about axis of rotation x and axis of rotation y as shown in figure 3 and 4.

6. Automated acrylic bending and arbitrary angle laser cutting machine as claimed in claim 1 wherein said acrylic bending tool (figure 6&7) is provided with feeding rollers, supporting rollers, front rollers, bending rollers, hot air injection, coolant spray port, driving gear, motor3 and motor4.

7. Automated acrylic bending and arbitrary angle laser cutting machine as claimed in claim 1 wherein said hot air injection (figure 6&7) is the hot air injection port to heat the acrylic rapidly.