CN112477088A

CN112477088A - PVB film embossing apparatus

Info

Publication number: CN112477088A
Application number: CN202011328822.4A
Authority: CN
Inventors: 武爱平
Original assignee: Nanjing Yading Optical Co Ltd
Current assignee: Nanjing Yading Optical Co Ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-03-12

Abstract

The invention provides a PVB film embossing device, in particular to the field of PVB intermediate film manufacturing, which comprises a pair of extrusion rollers with prefabricated lines, a unidirectional displacement precision sliding table capable of adjusting the clearance of the extrusion rollers and a cooling water tank, wherein the pair of extrusion rollers is provided with a pair of guide rollers; after the PVB film is extruded from the casting extrusion die head, the PVB film can enter a gap between two extrusion rollers, and when the PVB film is extruded, the lines of the extrusion rollers can be impressed on the PVB film. The invention is not only simple, practical, but also easy to implement.

Description

PVB film embossing apparatus

Technical Field

The invention belongs to the field of PVB intermediate film manufacturing, and particularly relates to a PVB film embossing device.

Background

One of the problems often encountered in the laminated glass production process is that bubbles appear in the laminated glass due to unsmooth exhaust in the laminated glass pressing process. The poor texture and roughness of the PVB film are the main reasons for poor air exhaust. The conventional production process of the PVB membrane comprises two methods for generating lines, one method is that PVB resin powder is plasticized and then extruded out of a die head, natural bursting lines can be formed on the surface of a casting film due to the change of outlet pressure, and the surface line parameters are unstable due to the influence of raw materials and a processing process to a great extent. The PVB diaphragm embossing device belongs to a rolling process and aims at providing a simple, practical and easy-to-implement rolling device and a processing method.

Disclosure of Invention

The invention aims to provide a PVB film embossing device which is simple, practical and easy to implement.

The invention provides the following technical scheme:

a PVB film embossing device comprises a pair of extrusion rollers with prefabricated lines, a unidirectional displacement precision sliding table capable of adjusting the clearance of the extrusion rollers and a cooling water tank; after the PVB film is extruded from the casting extrusion die head, the PVB film can enter a gap between two extrusion rollers, and when the PVB film is extruded, the lines of the extrusion rollers can be impressed on the PVB film.

Preferably, the diameter of the extrusion roller is 100 mm-600 mm, and the material of the extrusion roller is stainless steel.

Preferably, the extrusion roller is prefabricated with grains, and the grains are straight grains which are consistent with the rolling direction of the extrusion roller, transverse grains which are vertical to the rolling direction of the extrusion roller, or twill or cross grains which form any angle with the rolling direction;

preferably, the lines are inscribed, and the depth of the lines is 1/10-1/2 of the thickness of the PVB film.

Preferably, the extrusion rollers and the fixed bearings thereof are arranged on the unidirectional displacement precision sliding table, the distance between the two extrusion rollers can be changed by adjusting the displacement of the unidirectional displacement precision sliding table, and the distance range is 0.3 mm-3.2 mm.

Preferably, the bottom of the extrusion roller is immersed in the cooling water tank, the immersion depth is less than half of the diameter of the extrusion roller, and the extrusion contact area of the extrusion roller and the PVB film is positioned above the water level line.

Preferably, gears which are meshed with each other are arranged at one end of each of the two extrusion rollers, one of the gears is a driving gear, the other one of the gears is a driven gear, and the driving gear is driven by a precise speed regulating motor to rotate; the stretching rate of the PVB membrane by the extrusion roller can be adjusted by finely adjusting the rotating speed of the motor, so that the thickness of the membrane is adjusted.

Preferably, there are two PVB diaphragm guiding axles and a pair of take-up pulley through gear engagement in the cooling water tank, and the action wheel in the take-up pulley is driven by a torque motor, can adjust the pulling force of PVB diaphragm through the moment of torsion of adjustment torque motor to carry out secondary control to PVB diaphragm thickness.

The invention has the beneficial effects that:

1. the utility model provides a PVB diaphragm embossing apparatus installs behind the curtain coating die head, and the PVB membrane is extruded from the die head, gets into the clearance in the middle of two squeeze rolls promptly, makes the PVB membrane when being extrudeed, and the line on the squeeze roll is also impressed on the PVB membrane, and the clearance of adjustment squeeze roll can change the depth of impressed watermark to can make different roughness on the PVB diaphragm.

2. The utility model provides a the latter half of extrusion roll soaks in cooling water tank's aquatic, through the extrusion temperature who changes the temperature adjustment diaphragm, makes the PVB diaphragm accomplish the impression of line under the predetermined temperature, is favorable to the shaping and the maintenance of diaphragm line.

3. The stretching degree of the PVB membrane can be adjusted by adjusting the rotating speed of a precise speed regulating motor for driving the extrusion roller, so that the thickness of the membrane can be adjusted in a hot state, and the thickness of the membrane can be accurately adjusted by matching with cold state stretching adjustment.

4. The utility model provides a PVB diaphragm gets into coolant tank after being extrudeed roll impressed watermark, continues to receive the tensile of take-up pulley in coolant tank, and the rotatory motor of drive take-up pulley is accurate torque motor, through adjustment take-up pulley driving motor's torque value, adjustable tension to the PVB diaphragm to the realization is the secondary adjustment of PVB membrane thickness under the cooling state.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a side view of the present invention;

labeled as: 1. a cooling water tank; 2. extruding and rolling; 3. a one-way precision sliding table; 4. a guide wheel; 5. a tension wheel; 6. casting extrusion die head.

Detailed Description

As shown in figure 1, the PVB film embossing device is used for producing an intermediate film for automotive PVB front windshield laminated glass, the film thickness is required to be 0.76-0.78 mm, and the surface roughness RZ of the front side and the back side is 20-50 um. PVB diaphragm embossing apparatus parameter does: the diameter of the extrusion roller is 200mm, 45-degree twill is adopted, the grain depth is 0.2mm, the roller interval is 0.80mm, the rotating speed of the extrusion roller 2 is adjusted according to the film discharging speed of the casting extrusion die head 6, and the linear speed of the tangent point of the extrusion roller 2 is kept consistent with the film discharging speed. As shown in the drawing, after the PVB film is extruded from the casting extrusion die 6, the PVB film enters the gap between the two extrusion rollers 2, so that when the PVB film is extruded, the texture on the extrusion rollers 2 is also impressed on the PVB film.

The extrusion temperature of the water temperature adjusting membrane is changed, so that the PVB membrane can complete the embossing of lines at a preset temperature, and the lines of the membrane can be formed and maintained. After the film enters the cooling water tank 1, the film is continuously stretched by the tension wheel 5 in the cooling water tank 1, and the tension of the PVB film is adjusted by adjusting the torque value of the tension wheel 5 driving motor, so that the thickness of the PVB film is secondarily adjusted to 0.78mm in a cooling state. According to this setting, the PVB film roughness of producing is 40um, accords with the product requirement.

Example 2: the intermediate film for producing the automotive PVB front windshield sandwich glass is required to be 0.76-0.78 mm thick, and the surface roughness RZ of the front side and the back side is 20-50 um. PVB diaphragm embossing apparatus parameter does: the diameter of the extrusion roller 1 is 200mm, 45-degree twill is adopted, the grain depth is 0.1mm, the roller interval is 0.80mm, the rotating speed of the extrusion roller 1 is adjusted according to the film discharging speed of the casting extrusion die head 6, and the linear speed of the tangent point of the extrusion roller 1 is kept consistent with the film discharging speed. As shown in the drawing, after the PVB film is extruded from the die, it enters the gap between the two squeeze rollers 2, so that when the PVB film is squeezed, the lines on the squeeze rollers 2 are also impressed on the PVB film.

The extrusion temperature of the water temperature adjusting membrane is changed, so that the PVB membrane can complete the embossing of lines at a preset temperature, and the lines of the membrane can be formed and maintained. After the film enters the cooling water tank 1, the film is continuously stretched by the tension wheel 5 in the cooling water tank 1, and the tension of the PVB film is adjusted by adjusting the torque value of the tension wheel 5 driving motor, so that the thickness of the PVB film is secondarily adjusted to 0.78mm in a cooling state. According to this setting, the PVB film roughness of producing is 26um, accords with the product requirement.

Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a PVB film embossing apparatus which characterized in that: comprises a pair of extrusion rollers with prefabricated lines, a unidirectional displacement precision sliding table capable of adjusting the clearance of the extrusion rollers and a cooling water tank; after the PVB film is extruded from the casting extrusion die head, the PVB film can enter a gap between two extrusion rollers, and when the PVB film is extruded, the lines of the extrusion rollers can be impressed on the PVB film.

2. The PVB film embossing apparatus of claim 1, wherein: the diameter of the extrusion roller is 100 mm-600 mm, and the material of the extrusion roller is stainless steel.

3. The PVB film embossing apparatus of claim 2, wherein: the extrusion roller is prefabricated with lines, and the lines are straight lines consistent with the rolling direction of the extrusion roller or transverse lines vertical to the rolling direction of the extrusion roller or twill or cross lines forming any angle with the rolling direction.

4. The PVB film embossing apparatus of claim 3, wherein: the lines are inner-engraved lines, and the depth of the lines is 1/10-1/2 of the thickness of the PVB film.

5. The PVB film embossing apparatus of claim 4, wherein: the extrusion rollers and the fixed bearings thereof are arranged on the unidirectional displacement precision sliding table, the distance between the two extrusion rollers can be changed by adjusting the displacement of the unidirectional displacement precision sliding table, and the distance range is 0.3 mm-3.2 mm.

6. The PVB film embossing apparatus of claim 5, wherein: the bottom of the extrusion roller is immersed in the cooling water tank, the immersion depth is less than half of the diameter of the extrusion roller, and the extrusion contact area of the extrusion roller and the PVB film is positioned above the water level line.

7. The PVB film embossing apparatus of claim 5, wherein: one end of each of the two extrusion rollers is provided with gears which are meshed with each other, wherein one of the gears is a driving gear, the other one of the gears is a driven gear, and the driving gear is driven by a precise speed regulating motor to rotate.

8. The PVB film embossing apparatus of claim 5, wherein: two PVB membrane guide shafts and a pair of tension pulleys meshed through gears are arranged in the cooling water tank, and a driving wheel in each tension pulley is driven by a torque motor.