Laminated glass lamination initial pressing device
By using a bidirectional lead screw and secondary pressure roller design, the pressing width can be infinitely adjusted and the force can be evenly distributed, solving the problem of rapid wear of the pressure roller and improving the quality and production efficiency of laminated glass.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-04-10
AI Technical Summary
The mismatch between the pressure roller and the glass width in the existing pre-pressing machine leads to rapid wear of the pressure roller, affecting the quality of laminated glass and increasing production costs.
The design incorporates a bidirectional lead screw and symmetrically arranged secondary pressure rollers. By infinitely adjusting the distance between the secondary and main pressure rollers, the pressing width is matched with the glass width. The secondary and main pressure rollers are arranged in a triangular pattern, and combined with infrared heating and hydraulic control, the glass is subjected to uniform force.
Extending the service life of pressure rollers reduces the number of replacements, improves production continuity, increases the yield and structural strength of laminated glass, reduces production costs, and reduces optical distortion.
Smart Images
Figure CN121821933A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of laminated glass production technology, and particularly relates to a lamination and initial pressing device for laminated glass. Background Technology
[0002] Laminated glass is a composite glass product formed by processing multiple sheets of glass and an interlayer through a high-temperature and high-pressure process. Due to its high safety, sound insulation, and impact resistance, it is widely used in construction, automotive, aerospace and other fields. In the manufacturing process of laminated glass, the pre-pressing process is crucial. The pre-pressing machine rolls the stacked glass and interlayer to remove the air between the layers and achieve a preliminary and temporary bond, laying the foundation for the subsequent high-temperature and high-pressure final pressing. However, the width of the pressure rollers in current pre-pressing machines is fixed. This means that when the pre-pressing machine presses glass with a width smaller than the width of the pressure rollers, the rubber layer on the surface of the pressure rollers will directly and strongly contact and squeeze the glass edge. During long pressing cycles of the same batch and specifications of glass, the rubber layer on both sides of the pressure rollers is prone to premature wear and aging, and cracks or dents will appear on both sides of the pressure rollers. This causes the pressure on the glass during subsequent pressing to fluctuate in the axial direction of the pressure rollers, which in turn leads to quality defects such as poor local bonding, residual bubbles, and optical distortion in laminated glass after final pressing, seriously affecting the product qualification rate. Although the problem can be alleviated by adjusting the pressing position of the pressure roller and the glass, it cannot be completely solved. The pressure roller still needs to be replaced frequently, which not only delays production time but also increases production costs. Summary of the Invention
[0003] The purpose of this invention is to provide a pre-pressing device for laminated glass to solve the problem of excessive wear of the pressure roller caused by the difference in width between the pressure roller and the glass in the pre-pressing machine.
[0004] The technical solution includes a frame, a roller conveyor on the upper part of the frame, a housing fixed above the roller conveyor, a main pressure roller inside the housing, the main pressure roller can move up and down relative to the roller conveyor, the working width of the main pressure roller is smaller than the width of the inner cavity of the housing, a secondary pressure roller is provided behind the main pressure roller in the conveying direction of the roller conveyor, the axis of the secondary pressure roller is parallel to the axis of the main pressure roller, the secondary pressure roller can move up and down relative to the roller conveyor and can also move along its own axis, and the secondary pressure roller always overlaps with the main pressure roller in the radial projection during the movement along the axis.
[0005] In the above or some embodiments, the frame includes two crossbeams, with columns below the crossbeams and crossbars between adjacent columns. Multiple rollers are provided between the two crossbeams, with the axis of the rollers parallel to the axis of the main pressure roller. The multiple rollers are driven to rotate by external power via chain drive, thereby realizing the movement of glass on the frame.
[0006] In the above or some embodiments, a protective cover is fixed above the frame by bolts, and multiple infrared lamps are fixed inside the protective cover; thereby heating the glass interlayer film that is about to enter the housing for pressing.
[0007] In the above or some embodiments, a sliding groove is opened on each of the opposite surfaces of the housing. The sliding groove penetrates the inner and outer walls of the housing. A slider is provided in the sliding groove, and a stop bar is provided on both sides of the slider. The stop bar can prevent the slider from falling out of the sliding groove. The two sliders are connected to the main pressure roller through bearings. A hydraulic rod is fixed on the outer wall of the housing. The free end of the hydraulic rod is fixed to the slider. When the free end of the hydraulic rod extends or retracts, it can drive the main pressure roller to move up and down relative to the frame.
[0008] In the above or some embodiments, a lead screw is provided inside the housing, the axis of the lead screw is parallel to the axis of the main pressure roller, and the two ends of the lead screw are connected to the housing through bearings. A motor is fixed on the outside of the housing, and the rotating shaft of the motor is connected to the lead screw through a coupling. A base is provided inside the housing, and the top of the base is in contact with the top surface of the inner cavity of the housing. A through hole is opened on the base, and multiple lead screw nuts are fixed in the through hole. The lead screw nuts are coaxial with the lead screw. The secondary pressure roller is connected to the base. When the motor rotates, it drives the secondary pressure roller to move along the axis through the lead screw nuts and the base.
[0009] In the above or some embodiments, the lead screw is a bidirectional lead screw with two bases. The lead screw nuts on the two bases are respectively connected to two threads with opposite directions on the lead screw. When the lead screw rotates, the two bases always move closer to each other or separate at the same time, and the midpoint between the two bases is always located on the symmetry plane of the main pressure roller perpendicular to the axis of the main pressure roller. Each base is connected to a secondary pressure roller. The two secondary pressure rollers, which are symmetrically arranged relative to the main pressure roller, can infinitely adjust the pressing width of the device when moving relative to the axis.
[0010] In the above or some embodiments, four hydraulic cylinders are hinged to the bottom of the base, and the four hydraulic cylinders are respectively located at the four corners of the bottom surface of the base. Both ends of the secondary pressure roller are connected to rectangular blocks through bearings. Each rectangular block is hinged to the free end of two hydraulic cylinders, and the two hydraulic cylinders hinged to the same rectangular block are in the same position in the axial direction of the main pressure roller. The extension and retraction of the hydraulic cylinders drive the secondary pressure roller to move up and down relative to the frame, and the two V-shaped hydraulic cylinders can improve the stability of the secondary pressure roller during operation.
[0011] In the above or some embodiments, a guide plate is hinged to one side of the frame facing the roller conveyor, and a flat plate is hinged to the other end of the guide plate. Multiple telescopic rods are fixed to the flat plate by bolts, and the other end of the telescopic rods is fixed to the frame by bolts. By changing the length of the telescopic rods, the distance between the flat plate and the frame can be adjusted, thereby guiding glass of different widths to the pressing area.
[0012] In the above or some embodiments, the telescopic rod includes a round tube with an internal thread on the inner wall of the round tube, and a screw is screwed onto each end of the round tube. Both the plate and the frame have clearance holes, and the other end of the screw is fixed in the clearance hole on the plate or the frame by a nut.
[0013] This technical solution has the following technical effects: 1. This invention, through the design of a bidirectional lead screw and two symmetrically arranged secondary pressure rollers, allows for stepless adjustment of the distance between the two secondary pressure rollers according to the width of the glass to be pressed, so that the overall pressing width of the secondary pressure roller and the main pressure roller is equal to the width of the glass. This fundamentally solves the problem of rapid aging of existing pressure rollers due to line contact and extrusion between the rubber layer and the glass edge, which helps to extend the service life of the pressure rollers, reduce the number of times the pressure rollers need to be replaced, improve the continuity of production, and reduce production costs.
[0014] 2. In this invention, the main pressure roller and the secondary pressure roller are arranged in a triangular pattern, and the secondary pressure roller and the main pressure roller overlap in radial projection. At the same time, the glass itself has some rigidity, so the shape of the stress boundary of the interlayer film during lamination is approximately "V". Compared with the "I" shaped boundary of the existing integral roller, the air bubbles in the interlayer of this solution not only have more time to overflow, but the "V" shaped boundary can also actively squeeze the air bubbles to both sides, which is conducive to fully expelling air bubbles and improving the yield.
[0015] 3. The overlapping portion of the main pressure roller and the secondary pressure roller in the radial projection of the present invention can press the glass twice under constant pressure, which is beneficial to enhance the adhesion between the intermediate film and the glass, improve the structural strength of the semi-finished product, and reduce the probability of delamination or edge separation during subsequent handling to the autoclave.
[0016] 4. For glass with slightly poor flatness, a single pressing may not be able to fully compensate for the cavities caused by the glass undulations. This invention uses two pressings to allow the molten intermediate film to flow and fill the cavity multiple times, which helps to reduce the optical distortion of the finished product. It is especially suitable for glass applications with higher requirements for appearance, such as building curtain walls and shop windows. Attached Figure Description
[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 This is a diagram showing the positional relationship between the main pressure roller and the secondary pressure roller after the shell has been removed in this invention. Figure 4 This is a part drawing of the base of the present invention; Figure 5 For the present invention Figure 1 Enlarged view of point A in the middle; Legend: 1. Frame; 2. Roller conveyor; 3. Housing; 4. Main pressure roller; 5. Secondary pressure roller; 6. Crossbeam; 7. Column; 8. Idler roller; 9. Protective cover; 10. Slide groove; 11. Slider; 12. Hydraulic rod; 13. Lead screw; 14. Base; 15. Through hole; 16. Lead screw nut; 17. Hydraulic cylinder; 18. Rectangular block; 19. Guide plate; 20. Flat plate; 21. Telescopic rod; 22. Round tube; 23. Screw. Detailed Implementation
[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0019] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0020] Reference Figure 1 and Figure 2 One embodiment shown includes a frame 1, which includes two crossbeams 6. A column 7 is provided below the crossbeam 6, and a crossbar is provided between adjacent columns 7. Multiple idler rollers 8 are provided between the two crossbeams 6. The multiple idler rollers 8 form a roller conveyor 2. The axis of the idler rollers 8 is parallel to the axis of the main pressure roller 4. The multiple idler rollers 8 are driven to rotate by an external power via chain drive. A housing 3 is fixed to the crossbeam 6 by bolts. A groove 10 is opened on each opposite surface of the housing 3. The groove 10 penetrates the inner and outer walls of the housing 3. A slider 11 is provided in the groove 10. A stop bar is provided on both sides of the slider 11. A main pressure roller 4 is connected between the two sliders 11 by a bearing. The working width of the main pressure roller 4 is smaller than the width of the inner cavity of the housing 3. A hydraulic rod 12 is fixed on the outer wall of the housing 3. The free end of the hydraulic rod 12 is fixed to the slider 11. The hydraulic rod 12 can drive the main pressure roller 4 to move up and down relative to the frame 1. The main pressure roller 4 is provided with a secondary pressure roller 5 behind the roller conveyor 2 in the conveying direction. The axis of the secondary pressure roller 5 is parallel to the axis of the main pressure roller 4. The secondary pressure roller 5 can move up and down relative to the roller conveyor 2 and can also move along its own axis. During the movement of the secondary pressure roller 5 along the axis, it always overlaps with the main pressure roller 4 in the radial projection.
[0021] In the above embodiment, the roller conveyor 2 is connected to the conveying component of the preceding vacuuming process, so that the laminated glass after vacuum degassing can automatically move onto the roller conveyor 2, or the glass can be manually placed onto the roller conveyor 2, with one side of the glass parallel to the axis of the support roller 8 and the other side coplanar with the end face of the main pressure roller 4 away from the secondary pressure roller 5. The support roller 8 is driven by external power to move the glass towards the housing 3. After the glass enters the housing 3, both its upper and lower sides simultaneously contact the main pressure roller 4 and the support roller 8. The pressing pressure of the main pressure roller 4 on the glass is controlled by the hydraulic rod 12, and the bearing between the slider 11 and the main pressure roller 4 can... A spherical bearing is selected to accommodate the tilting state of the main pressure roller 4 under special circumstances. If the width of the glass is the same as the width of the main pressure roller 4, the secondary pressure roller 5 is located at the highest point of the vertical stroke, that is, the secondary pressure roller 5 does not contact the glass. If the width of the glass is greater than the width of the main pressure roller 4, the position of the secondary pressure roller 5 is adjusted so that the end face of the secondary pressure roller 5 away from the main pressure roller 4 is coplanar with the side wall of the secondary pressure roller 5, and the pressure of the secondary pressure roller 5 on the glass is equal to the pressure of the main pressure roller 4 on the glass. Thus, the total pressing width of the main pressure roller 4 and the secondary pressure roller 5 is equal to the width of the glass, achieving uniform pressing of the entire piece of glass.
[0022] Reference Figure 1 In one embodiment shown, a protective cover 9 is fixed to the top of the frame 1 by bolts, and multiple infrared lamps are fixed inside the protective cover 9; the lamps can be Heraeus medium and short wave dual-tube quartz infrared heating tubes.
[0023] In the above embodiment, the glass is heated by the infrared lamp tube installed inside the protective cover 9 before entering the housing 3, which softens the interlayer film inside the laminated glass and improves its adhesion.
[0024] Reference Figure 2 , Figure 3 and Figure 4 In one embodiment shown, a lead screw 13 is provided inside the housing 3. The axis of the lead screw 13 is parallel to the axis of the main pressure roller 4. Both ends of the lead screw 13 are connected to the housing 3 through bearings. A heat dissipation box is fixed on the outside of the housing 3. A motor is provided inside the heat dissipation box. The rotating shaft of the motor is connected to the lead screw 13 through a coupling. A base 14 is provided inside the housing 3. The top of the base 14 is in contact with the top surface of the inner cavity of the housing 3. A through hole 15 is opened on the base 14. Multiple lead screw 13 nuts are fixed in the through hole 15. The lead screw 13 nuts are coaxial with the lead screw 13. The secondary pressure roller 5 is connected to the base 14.
[0025] In the above embodiment, the position of the secondary pressure roller 5 on the axis of the main pressure roller 4 can be preset in advance by the motor; the motor drives the lead screw 13 to rotate through the coupling. Since the top surface of the base 14 is always in contact with the top surface of the inner cavity of the housing 3, the base 14 will slide along the axis of the main pressure roller when the lead screw 13 rotates. Since the axis of the lead screw 13 is parallel to the axis of the main pressure roller 4, the position of the secondary pressure roller 5 on the axis of the main pressure roller 4 can be controlled by the motor.
[0026] Reference Figure 3 In one embodiment shown, the lead screw 13 is a bidirectional lead screw 13, and there are two bases 14. The nuts on the lead screw 13 on the two bases 14 are respectively connected to two threads with opposite directions on the lead screw 13. When the lead screw 13 rotates, the two bases 14 always move closer to each other or separate at the same time, and the midpoint between the two bases 14 is always located on the symmetry plane of the main pressure roller 4 perpendicular to the axis of the main pressure roller 4. Each base 14 is connected to a secondary pressure roller 5.
[0027] In the above embodiment, when the position of the secondary pressure roller 5 is adjusted by the motor, since there are two secondary pressure rollers 5 and the bases 14 connected to the two secondary pressure rollers 5 are respectively on the two threads with opposite directions of the bidirectional lead screw 13, the two bases 14 will move away from each other or move closer to each other when the motor rotates in one direction. Since the midpoint between the two bases 14 is always located on the symmetry plane of the main pressure roller 4 perpendicular to the axis of the main pressure roller 4, the two secondary pressure rollers 5 have the same overlap width with the main pressure roller 4 in the radial projection when they move towards or away from each other with the bases 14. This not only enables stepless adjustment of the pressing width of the device, but also ensures that the main pressure roller 4 is located in the middle of the glass during pressing, preventing uneven force on both sides of the glass due to contact between the main pressure roller 4 and one side, which could lead to displacement between the upper and lower glass layers. Furthermore, it allows the two secondary pressure rollers 5 and the main pressure roller 4 to form a V-shaped arrangement. The main pressure roller 4 first pushes the air bubbles in the middle of the glass to both sides, and the two secondary pressure rollers 5 then further push the air bubbles out of the interlayer, extending the escape time window for the air bubbles. This avoids the current situation where air bubbles in the middle of the laminated glass often cannot escape in time due to the excessive width of the pressure rollers. Moreover, each layer of glass has a certain rigidity, so the combination of the V-shaped arrangement of the main pressure roller 4 and secondary pressure rollers 5 allows the pressure boundary of the glass to form a V-shape, thereby achieving the effect of actively squeezing the air bubbles to both sides, preventing the air bubbles from moving in the direction of glass feeding, and helping to shorten the escape distance of the air bubbles.
[0028] Reference Figure 3 and Figure 4 In one embodiment shown, four hydraulic cylinders 17 are hinged to the bottom of the base 14, and the four hydraulic cylinders 17 are located at the four corners of the bottom surface of the base 14. Both ends of the secondary pressure roller 5 are connected to rectangular blocks 18 through bearings. Each rectangular block 18 is hinged to the free end of two hydraulic cylinders 17, and the two hydraulic cylinders 17 hinged to the same rectangular block 18 are at the same position in the axial direction of the main pressure roller 4.
[0029] In the above embodiment, each secondary pressure roller 5 has two hydraulic cylinders 17 connected in a V-shape at any end between the base 14 and the rectangular block 18. When the height of the secondary pressure roller 5 needs to be adjusted, the lengths of the four hydraulic cylinders 17 on the secondary pressure roller 5 are adjusted at the same time to achieve the height adjustment of the secondary pressure roller 5. The V-shaped arrangement of the hydraulic cylinders 17 can improve the stability of the secondary pressure roller 5 during operation, and also reduce the working pressure of each hydraulic cylinder 17, which is beneficial to select smaller hydraulic cylinders 17 in the small space inside the housing 3.
[0030] Reference Figure 5 In one embodiment shown, a guide plate 19 is hinged to the side of the frame 1 facing the roller conveyor 2, and a flat plate 20 is hinged to the other end of the guide plate 19. Multiple telescopic rods 21 are fixed to the flat plate 20 by bolts, and the other end of the telescopic rods 21 is fixed to the frame 1 by bolts. The telescopic rods 21 include a round tube 22 with internal threads on the inner wall of the round tube 22. A screw 23 is screwed onto each end of the round tube 22. Both the flat plate 20 and the frame 1 have clearance holes. The other end of the screw 23 is fixed in the clearance hole on the flat plate 20 or the frame 1 by a nut.
[0031] In the above embodiment, since one end of the guide plate 19 is hinged to the crossbeam 6 on the frame 1 and the other end is hinged to the plate 20, and the plate 20 is fixed away from the crossbeam 6 by multiple telescopic rods 21, the guide plate 19 is fixed between the crossbeam 6 and the plate 20 in an inclined state. In use, the distance between the plate 20 and the crossbeam 6 is first adjusted by rotating the round tube 22 so that the distance between the two plates 20 and the crossbeam 6 is equal, and the distance between the two plates 20 is equal to the width of the glass. Whenever glass moves into the housing 3 on the roller 2, the guide plate 19 can guide the glass to the space between the two plates 20, so that when the glass enters the housing 3, the main pressure roller 4 can press the center of the glass, and the two secondary pressure rollers 5 press the sides of the glass. The end face of the secondary pressure rollers 5 away from the main pressure roller 4 is coplanar with the side of the glass, avoiding line contact and squeezing between the rubber layer on the main pressure roller 4 or the secondary pressure roller 5 and the side of the glass.
Claims
1. A laminar glass lamination initial pressing device, characterized in that, The machine includes a frame (1), a roller conveyor (2) on the upper part of the frame (1), a housing (3) fixed above the roller conveyor (2), a main pressure roller (4) inside the housing (3), the main pressure roller (4) can move up and down relative to the roller conveyor (2), the working width of the main pressure roller (4) is smaller than the width of the inner cavity of the housing (3), a secondary pressure roller (5) is provided behind the main pressure roller (4) in the conveying direction of the roller conveyor (2), the axis of the secondary pressure roller (5) is parallel to the axis of the main pressure roller (4), the secondary pressure roller (5) can move up and down relative to the roller conveyor (2) and can also move along its own axis, and the secondary pressure roller (5) always overlaps with the main pressure roller (4) in the radial projection during the movement along the axis.
2. The apparatus according to claim 1, characterized in that, The frame (1) includes a crossbeam (6), there are two crossbeams (6), and a column (7) is provided below the crossbeam (6). A crossbar is provided between adjacent columns (7), and multiple idlers (8) are provided between the two crossbeams (6). The axis of the idlers (8) is parallel to the axis of the main pressure roller (4), and the multiple idlers (8) are driven to rotate by external power through chain drive.
3. The apparatus according to claim 1, characterized in that, A protective cover (9) is fixed to the top of the frame (1) by bolts, and multiple infrared lamps are fixed inside the protective cover (9).
4. The apparatus according to claim 1, characterized in that, Each of the opposite surfaces of the housing (3) has a groove (10) through which the groove (10) penetrates the inner and outer walls of the housing (3). A slider (11) is provided in the groove (10), and a stop bar is provided on both sides of the slider (11). The two sliders (11) are connected to the main pressure roller (4) through bearings. A hydraulic rod (12) is fixed on the outer wall of the housing (3), and the free end of the hydraulic rod (12) is fixed to the slider (11).
5. The apparatus according to claim 1, characterized in that, The housing (3) is provided with a lead screw (13), the axis of the lead screw (13) is parallel to the axis of the main pressure roller (4), the two ends of the lead screw (13) are connected to the housing (3) through bearings, a motor is fixed on the outside of the housing (3), the motor shaft is connected to the lead screw (13) through a coupling, a base (14) is provided inside the housing (3), the top of the base (14) is in contact with the top surface of the inner cavity of the housing (3), a through hole (15) is opened on the base (14), a plurality of lead screw (13) nuts are fixed in the through hole (15), the lead screw (13) nuts are coaxial with the lead screw (13), and the secondary pressure roller (5) is connected to the base (14).
6. The apparatus according to claim 5, characterized in that, The lead screw (13) is a bidirectional lead screw (13). There are two bases (14). The nuts of the lead screw (13) on the two bases (14) are respectively connected to two threads with opposite directions on the lead screw (13). When the lead screw (13) rotates, the two bases (14) always move closer to each other or separate at the same time. The midpoint between the two bases (14) is always located on the symmetry plane of the main pressure roller (4) perpendicular to the axis of the main pressure roller (4). Each base (14) is connected to a secondary pressure roller (5).
7. The apparatus according to claim 5, characterized in that, The base (14) is hinged to four hydraulic cylinders (17) at the bottom, and the four hydraulic cylinders (17) are located at the four corners of the bottom surface of the base (14). Both ends of the secondary pressure roller (5) are connected to rectangular blocks (18) through bearings. Each rectangular block (18) is hinged to the free end of two hydraulic cylinders (17), and the two hydraulic cylinders (17) hinged to the same rectangular block (18) are in the same position in the axial direction of the main pressure roller (4).
8. The apparatus according to claim 1, characterized in that, The frame (1) is hinged to a guide plate (19) on one side facing the roller conveyor (2), and a flat plate (20) is hinged to the other end of the guide plate (19). Multiple telescopic rods (21) are fixed on the flat plate (20) by bolts, and the other end of the telescopic rods (21) is fixed to the frame (1) by bolts.
9. The apparatus according to claim 8, characterized in that, The telescopic rod (21) includes a round tube (22), the inner wall of the round tube (22) is provided with internal threads, and a screw (23) is screwed on both ends of the round tube (22). Both the plate (20) and the frame (1) have clearance holes. The other end of the screw (23) is fixed in the clearance hole on the plate (20) or the frame (1) by a nut.