WO2018090310A1

WO2018090310A1 - Stretch molding system for acrylic sheet

Info

Publication number: WO2018090310A1
Application number: PCT/CN2016/106333
Authority: WO
Inventors: 崔炳仁; 于忠元; 赵洪星; 易荣鹏; 葛昌国; 姜凡
Original assignee: 艾能赛克机械设备江苏有限公司
Priority date: 2016-11-18
Filing date: 2016-11-18
Publication date: 2018-05-24

Abstract

A stretch molding system for an acrylic sheet. The stretch molding system comprises a sheet-feeding means (100), a clamping means (200) and a sheet-removal means (300). The clamping means (200) is located in a stretch molding region of the system, the sheet-feeding means (100) and the sheet-removal means (300) are located on either side of the stretch molding region, the sheet-feeding means (100) is used for moving a sheet to the clamping means (200), the sheet-removal means (300) is used for moving the processed sheet out of the clamping means (200), the clamping means (200) comprises a driving unit (210) and a plurality of clamping modules (220), the plurality of clamping modules (220) having varying angles and spaces therebetween, the clamping modules (220) being used for fixing the sheet, and the driving unit (210) being used for driving the clamping modules (220). The stretch molding system uses automatically controlled operations, saving time and labor, reducing workers' workload, and improving work efficiency; the provision of a heating device can guarantee sheet temperature during transportation without too much loss; and the uniform heating of the sheet being stretched can be effectively guaranteed.

Description

Stretch forming system for acrylic sheet

Technical field

The present invention relates to the field of stretch forming devices, and more particularly to a stretch forming system for acrylic sheets.

Background technique

Thermoplastic refers to a plastic that has heat softening and cooling hardening properties. It softens and flows when heated, and the cooling hardens. This process is reversible and can be repeated. Today's acrylic sheet is an important thermoplastic developed earlier. Among them, polymethyl methacrylate is usually called acrylic (plexiglass), the abbreviation PMMA, which has the advantages of high transparency and easy machining. It is usually used frequently. Glass alternative material.

In terms of architecture, acrylic is mainly used in lighting, roofs, roofs, stairs and indoor wall panels; with the construction of large city hotels, hotels and high-end residences, the lighting body made of acrylic extruded panels has a structure. High strength, light weight, high light transmittance and good safety performance; in the sanitary ware, acrylic can make bathtubs, washbasins, dressing tables and other products; it has also been widely used in medical treatment. With the widespread use of acrylic materials, devices or systems that process acrylic materials are becoming increasingly important.

The traditional method is to heat the sheet after being heated in an oven and manually transport it to the stretching zone, which is not only time-consuming and labor-intensive, but also affects the temperature of the sheet; most of the current methods are to use a vacuum pressure forming device to carry the acrylic sheet. Processing, in which the sheet is mainly fixed on one side of the mold by means of a collet to keep it firm, and the conventional clamping device of this processing method generally simply inserts and positions the acrylic sheet, and there are many such clamping devices. Disadvantages, for example, because the surfaces of the upper clamping frame and the lower clamping frame are truly parallel, the thickness of the sheet is not uniform, the contact between the clamping device and the sheet is incomplete, so that the sheet cannot be effectively It is fixed, and the clamping device is difficult to assemble and disassemble the acrylic sheet.

Summary of the invention

The technical problem to be solved by the present invention is how to overcome the incompleteness of the contact between the clamping device and the acrylic sheet, the difficulty in the upper and lower sheets, the time-consuming and labor-intensive, and the difficulty in assembling and disassembling the sheet.

The present invention provides a stretch forming system for an acrylic sheet, the stretch forming system comprising a top sheeting device, a clamping device and a lower sheet device, the clamping device being located in a stretch forming region of the system The sheeting device and the lower sheet device are located on both sides of the stretch forming region, the sheet loading device is for moving the sheet to the holding device, and the lower sheet device is for processing the processed The sheet is removed from the gripping device,

Further, the clamping device comprises a driving unit and a plurality of clamping modules, wherein the angles and the spacings of the plurality of clamping modules are different, and the clamping module is used for fixing the sheet. The drive unit is used to drive the clamping module.

Further, each of the clamping modules includes a first clamping assembly, a second clamping assembly and an auxiliary heating assembly, the first clamping assembly comprising a fixing seat, a transmission rack and a transmission gear, the fixing seat For fixing the clamping module, the transmission rack and the transmission gear can be adjusted according to the starting position of the sheet before stretching and the end position of the sheet after stretching.

Further, the second clamping assembly comprises a movable pressing block, a fixed pressing plate and a linear sliding unit, and the movable pressing block and the fixed pressing plate can automatically set different pressing according to the thickness variation of the sheet. The force, the linear sliding unit enables the sheets to be stretched in the same direction.

Further, the number of the driving units is four, the driving units are located at four corners of the stretch forming region, and each of the driving units includes a second driving and auxiliary driving assembly, and the auxiliary driving assembly includes a speed reducer, a torque limiter, an auxiliary drive cylinder and a drive shaft, the second drive for driving a drive shaft, the speed reducer for limiting the speed of sheet stretching, the torque limiter for limiting sheet stretching Torque, the auxiliary transmission cylinder is used to prevent distortion of the drive shaft.

Wherein, the second clamping assembly further comprises a linear sliding unit fixing seat for fixing the linear sliding unit, and a shaft clamping sleeve for tightly covering the transmission shaft.

Further, the loading device includes a first driving, a horizontal moving mechanism, a heating mechanism, and a first lifting mechanism, the first driving for driving the loading device, the horizontal moving mechanism For moving the sheet onto the top stage of the top sheeting device, the heating mechanism is located on the upper stage of the top sheeting device for heating the sheet, the first lifting mechanism for The sheet is raised to the holding device.

Further, the lower sheet device includes a third driving and a second lifting mechanism for driving the lower sheet device, and the second lifting mechanism is for clamping the stretched sheet from the sheet Hold the device out.

Preferably, the first drive, the second drive and the third drive are both driven by a servo motor.

Further, the auxiliary heating assembly includes a plurality of temperature zones, each of the temperature zones including a K-type thermocouple, and the K-type thermocouples are temperature-controlled by six three-phase SCRs, each of the temperature zones being capable of The temperature range is adjusted from 20 degrees to 450 degrees. Among them, the K-type thermocouple is a temperature sensor, the SCR is a power regulator, and the K-type thermocouple is used in conjunction with a power regulator for temperature control.

Preferably, the number of the clamping modules is a multiple of 11, and the clamping module is clamped from the edge of the acrylic sheet.

Further, the plurality of clamping modules are radially distributed along a center of the stretch forming region.

Among them, a method for stretch forming of an acrylic sheet includes:

S1, the acrylic sheet is moved to the upper stage of the upper sheet device by a horizontal moving mechanism, and the heating mechanism heats the sheet on the upper stage;

S3, the film loading device moves the sheet to the lower portion of the stretch forming region by the first driving, moves the sheet up by the first lifting mechanism, and finally fixes the clamping device on the stretch forming region;

S4, using an auxiliary heating device to heat the sheet fixed on the clamping device, and then performing a stretching forming operation;

S5, the upper device returns to the initial position;

S6, the lower sheet device is moved to directly below the stretch forming region by the second driving, and then the stretched formed sheet is removed by the second lifting mechanism.

The beneficial effects of the stretch forming system for acrylic sheets of the present invention are:

(1) The upper and lower device of the stretch forming system of the present invention adopts automatic control Operation, saving time and effort, reducing the workload of workers and improving work efficiency;

(2) The upper stage of the upper sheet device of the stretch forming system of the present invention is provided with a heating device to ensure that the temperature of the sheet is not excessively lost during the conveying process;

(3) The clamping device of the stretch forming system of the present invention can automatically set different pressing forces according to the thickness variation of the sheet, thereby avoiding the phenomenon of slipping off or being pressed out during the sheet clamping process;

(4) The auxiliary heating device of the stretch forming system of the present invention can realize temperature adjustment from room temperature to 450 degrees, has a wide adjustment range, and can effectively ensure uniform heating of the stretched sheet.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive effort.

Figure 1 is a schematic view showing the structure of a stretch forming system of the present invention;

Figure 2 is a schematic view showing the structure of a holding device in the system of the present invention;

Figure 3 is a plan view of the clamping device in the system of the present invention;

Figure 4 is a schematic view showing the structure of a second clamping assembly in the system of the present invention;

Figure 5 is a schematic structural view of a top film device in the system of the present invention;

Figure 6 is a schematic view showing the structure of the lower sheet device in the system of the present invention.

In the figure, a 100-top device, a 110-first drive, a 120-horizontal movement mechanism, a 130-heating mechanism, a 140-first lift mechanism, a 200-clamping device, a 210-drive unit, a 211-second drive, 212-Reducer, 213-torque limiter, 214-auxiliary drive cylinder, 215-drive shaft, 220-clamping module, 222-mounting seat, 223-drive rack, 225-active clamping block, 226-fixed Pressing plate, 227-linear sliding unit, 228-linear sliding unit fixing seat, 229-axis tight sleeve, 300-lowering device, 310-third drive, 320-second lifting mechanism.

detailed description

The technical solution in the embodiment of the present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention. The invention is described in a clear and complete manner, and it is obvious that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

As shown in FIGS. 1-6, the present embodiment provides a stretch forming system for an acrylic sheet, the stretch forming system including a sheet loading device 100, a clamping device 200, and a lower sheet device 300, The gripping device 200 is located in a stretch forming region of the system, the sheet loading device 100 and the lower sheet device 300 are located on both sides of the stretch forming region, and the sheet loading device 100 is used to move the sheet to the same The clamping device 200 is configured to remove the processed sheet from the clamping device 200,

The clamping device 200 includes a driving unit 210 and a plurality of clamping modules. The angles and the spacings of the plurality of clamping modules are different. The clamping module 220 is used for fixing the sheet. The driving unit 210 is configured to drive the clamping module.

Each of the clamping modules 220 includes a first clamping assembly, a second clamping assembly and an auxiliary heating assembly, the first clamping assembly comprising a fixing base 222 and a transmission rack 223, the fixing base 222 is used for The clamping module 220 is fixed, and the driving rack 223 can be adjusted according to the starting position of the sheet before stretching and the end position of the sheet after stretching.

The second clamping assembly includes a movable pressing block 225, a fixed pressing plate 226 and a linear sliding unit 227, and the movable pressing block 225 and the fixed pressing plate 226 can be automatically set differently according to the thickness variation of the sheet. The pressing force, the linear sliding unit 227 is capable of stretching the sheets in the same direction.

The number of the driving units 210 is four, the driving unit 210 is located at four corners of the stretch forming region, and each of the driving units 210 includes a second driving 211 and an auxiliary driving component, and the auxiliary driving component A speed reducer 212, a torque limiter 213, an auxiliary drive cylinder 214 for driving the drive shaft 215, and a drive shaft 215 for limiting the speed at which the sheet is stretched, the torque The limiter 213 is for limiting the torque of the sheet stretching, and the auxiliary transmission cylinder 214 is for preventing the transmission shaft 215 from being twisted.

The second clamping assembly further includes a linear sliding unit fixing base 228 for fixing the linear sliding unit 227, and a shaft tight sleeve 229, the shaft clamping sleeve 229 For tightening the drive shaft 215.

The loading device 100 includes a first driving 110, a horizontal moving mechanism 120, a heating mechanism 130, and a first lifting mechanism 140. The first driving 110 is used to drive the loading device 100, and the horizontal moving mechanism 120 is used. The sheet is moved to the upper stage of the top sheet device 100, and the heating mechanism 130 is located on the upper stage of the top sheet device 100 for heating the sheet, the first lifting mechanism 140 Used to lift the sheet onto the gripping device 200.

The lower sheet device 300 includes a third drive 310 for driving the lower sheet device 300, and a second lift mechanism 320 for stretching the formed sheet The material is removed from the clamping device 200.

Preferably, the first driving 110, the second driving 211 and the third driving 310 are all driven by a servo motor.

The auxiliary heating assembly includes a plurality of temperature zones, each of the temperature zones including a K-type thermocouple, the K-type thermocouples are temperature-controlled by six three-phase SCRs, each of which can be adjusted in temperature The range is 20 degrees to 450 degrees. Among them, the K-type thermocouple is a temperature sensor, the SCR is a power regulator, and the K-type thermocouple is used in conjunction with a power regulator for temperature control.

Preferably, the number of the clamping modules 220 is 44, and each of the groups is 11 , and the clamping module 220 is clamped from the edge of the acrylic sheet. The plurality of clamping modules are radially distributed along a center of the stretch forming region.

Among them, a method for stretch forming of an acrylic sheet includes:

S5, the upper device returns to the initial position;

The beneficial effects of implementing the stretch forming system of the present invention are:

(1) The upper film device and the lower film device of the stretch forming system of the present invention adopt automatic control operation, save time and labor, reduce workload of workers, and improve work efficiency;

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It is the scope of protection of the present invention.

Claims

A stretch forming system for an acrylic sheet, characterized in that the stretch forming system comprises a top sheet device (100), a holding device (200) and a lower sheet device (300), the holding device (200) located in a stretch forming region of the system, the top sheet device (100) and the lower sheet device (300) are located on both sides of the stretch forming region, and the top sheet device (100) is used for The sheet is moved to the holding device (200) for removing the processed sheet from the holding device (200),

The clamping device (200) comprises a driving unit (210) and a plurality of clamping modules, the angles and spacings of the plurality of clamping modules are different, and the clamping module (220) is used for fixing The sheet, the driving unit (210) is used to drive the clamping module.
The stretch forming system of claim 1 wherein each of said clamping modules (220) includes a first clamping component, a second clamping component, and an auxiliary heating component, said first clamping The assembly includes a fixing base (222) for fixing the clamping module (220) and a driving rack (223), and the driving rack (223) can be according to the stretching front piece The starting position of the material and the end position of the sheet after stretching are adjusted.
The stretch forming system according to claim 2, wherein the second clamping assembly comprises a movable pressing block (225), a fixed pressing plate (226), and a linear sliding unit (227), the activity The pressing block (225) and the fixed pressing plate (226) are capable of automatically setting different pressing forces depending on the thickness variation of the sheet, and the linear sliding unit (227) enables the sheets to be stretched in the same direction.
The stretch forming system according to claim 1, wherein the number of the driving units (210) is four, and the driving unit (210) is located at four corners of the stretch forming region, each The drive unit (210) includes a second drive (211) and an auxiliary drive assembly including a reducer (212), a torque limiter (213), an auxiliary drive cylinder (214), and a drive shaft (215) The second drive (211) is for driving the drive shaft (215), The speed reducer (212) is for limiting the speed at which the sheet is stretched, the torque limiter (213) is for limiting the torque of the sheet stretching, and the auxiliary transmission cylinder (214) is for preventing the drive shaft (215) ) A distortion has occurred.
The stretch forming system of claim 2, wherein the second clamping assembly further comprises a linear sliding unit mount (228) and a bushing sleeve (229), the linear slide unit mount (228) ) for fixing a linear sliding unit (227) for tightening the drive shaft (215).
The stretch forming system according to claim 1, wherein the top sheeting device (100) comprises a first drive (110), a horizontal moving mechanism (120), a heating mechanism (130), and a first lifting mechanism ( 140), the first driving (110) is for driving the loading device (100), and the horizontal moving mechanism (120) is for moving a sheet to a loading stage of the upper device (100), A heating mechanism (130) is located on the upper stage of the top sheet device (100) for heating the sheet, and the first lifting mechanism (140) is for moving the sheet to the holding device (200) ).
The stretch forming system according to claim 1, wherein said lower sheet device (300) comprises a third drive (310) and a second lift mechanism (320), said third drive (310) being for The lower sheet device (300) is driven, and the second lifting mechanism (320) is for removing the stretch-formed sheet from the holding device (200).
The stretch forming system according to claim 2, wherein said auxiliary heating unit comprises a plurality of temperature zones, each of said temperature zones comprising a K-type thermocouple, said K-type thermocouple adopting six three The phase SCR performs temperature control, and each of the temperature zones can be adjusted in a temperature range of 20 to 450 degrees.
The stretch forming system according to claim 1, wherein the number of the clamping modules (220) is a multiple of 11, and the clamping module (220) is clamped from the edge of the acrylic sheet. The clamping module is radially distributed along the center of the stretch forming region.
A method for stretch forming of an acrylic sheet, comprising:

S1, the acrylic sheet is moved to the upper stage of the upper sheet device by a horizontal moving mechanism, and the heating mechanism heats the sheet on the upper stage;

S3, the film loading device moves the sheet to the lower portion of the stretch forming region by the first driving, moves the sheet up by the first lifting mechanism, and finally fixes the clamping device on the stretch forming region;

S4, using an auxiliary heating device to heat the sheet fixed on the clamping device, and then performing a stretching forming operation;

S5, the upper device returns to the initial position;

S6, the lower sheet device is moved to directly below the stretch forming region by the second driving, and then the stretched formed sheet is removed by the second lifting mechanism.