A pre-pressed PET film biaxial stretching device

Abstract

The invention discloses a pre-pressed PET film bidirectional stretching device, comprising a frame, a sleeve, a preheating plate, a heating box, a heating tube, a rotary suction head, a central tube, an adjusting nut, a baffle, a first bevel gear, a servo motor, a second bevel gear, a heat conducting rod, a door frame, a first cylinder, an upper pressing plate, a first guide rod, a first spring, a lower pressing plate, and a stretching mechanism. The electromagnet is energized and attracted with a support seat to press the PET film, the second cylinder pulls the slider to move in a direction away from the preheating plate to stretch the PET film transversely, the electromagnet loses power, the spring drives the electromagnet to reset, the cylinder pushes the slider back, the servo motor drives the rotary suction head to rotate the PET film, and the stretching mechanism moves to complete the longitudinal stretching of the PET film. The device has a simple structure, can automatically stretch the PET film in both directions, greatly improves the comprehensive mechanical properties of the PET film, and pre-presses the PET film by a pre-pressing method, effectively prevents the PET film from warping and deforming, improves the stretching effect, and automatically rotates the PET film to improve work efficiency.

Description

Technical Field

[0001] The invention relates to a mechanical device, in particular to a pre-pressed PET film bidirectional stretching device. Background Art

[0002] PET film is also known as high temperature resistant polyester film. It has excellent physical properties, chemical properties, dimensional stability, transparency, and recyclability. It can be widely used in magnetic recording, photosensitive materials, electronics, electrical insulation, industrial films, packaging decoration, screen protection, optical grade mirror surface protection and other fields. In the new energy power battery industry, PET film is needed for electrical insulation protection, while traditional PET film is directly pulled out by traction rollers for longitudinal stretching. After unidirectional stretching, the mechanical properties of PET film along the longitudinal direction are good, but when used in complex environments, creases and other problems that affect insulation performance may occur. In view of the above defects, it is necessary to design a pre-pressed PET film bidirectional stretching device. Summary of the invention

[0003] The purpose of the present invention is to provide a pre-pressed PET film biaxial stretching device, which can first pre-press the PET film, then stretch it transversely, and finally automatically rotate the PET film to stretch it longitudinally, so as to effectively improve the comprehensive mechanical properties of the PET film.

[0004] In order to solve the above technical problems, the technical scheme of the present invention is: a pre-pressed PET film biaxial stretching device, comprising a frame, a sleeve, a preheating plate, a heating box, a heating tube, a rotary suction head, a central tube, an adjusting nut, a baffle, a first bevel gear, a servo motor, a second bevel gear, a heat conducting rod, a door frame, a first cylinder, an upper pressing plate, a first guide rod, a first spring, a lower pressing plate, and a stretching mechanism, wherein the sleeve is located at the center of the upper end of the frame, the sleeve is threadedly connected to the frame, the preheating plate is located at the upper end of the sleeve, and the preheating plate is threadedly connected to the sleeve , the heating box is located at the lower end of the preheating plate, the heating box is threadedly connected to the preheating plate, one end of the heating tube extends into the heating box, the heating tube is threadedly connected to the heating box, the rotary suction head is located at the upper end of the preheating plate, the upper end surface of the rotary suction head is flush with the upper end surface of the preheating plate, the center tube passes through the preheating plate and is located at the lower end of the rotary suction head, the center tube is threadedly connected to the preheating plate and to the rotary suction head, the adjusting nut is located outside the center tube, the adjusting nut is threadedly connected to the center tube, the baffle The plate is located outside the center tube and at the upper end of the adjusting nut, the first bevel gear is located outside the center tube, the first bevel gear is tightly connected to the center tube, the servo motor is located at the upper end of the frame, the servo motor is threadedly connected to the frame, the second bevel gear is located on the left side of the servo motor and on the right side of the first bevel gear, the second bevel gear is tightly connected to the servo motor and meshed with the first bevel gear, the heat conducting rod is located outside the preheating plate, the heat conducting rod is tightly connected to the preheating plate, the door frame is located at the upper end of the frame, the door frame is threadedly connected to the frame, the first cylinder is located at the upper end of the door frame, the first cylinder is threadedly connected to the door frame, the first guide rod is located through the upper pressure plate, the first guide rod is slidably connected to the upper pressure plate, the first spring is located at the lower end of the upper pressure plate, the first spring is welded to the upper pressure plate, the lower pressure plate is located at the lower end of the first spring and at the lower end of the first guide rod, the lower pressure plate is threadedly connected to the first spring and threadedly connected to the first guide rod, the stretching mechanism is located at the upper end of the frame, and the stretching mechanism is slidably connected to the frame.

[0005] The present invention is further improved as follows:

[0006] Furthermore, the rotary suction head is also provided with a main suction groove, which is located at the upper end of the rotary suction head, and does not penetrate the rotary suction head.

[0007] Furthermore, the rotary suction head is also provided with a branch suction groove, and the branch suction groove is interconnected with the main suction groove cavity.

[0008] Furthermore, the central tube is also provided with an air suction hose, which is located at the lower end of the central tube and is threadably connected to the central tube.

[0009] Furthermore, the pressing plate is also provided with a silicone rubber pad, which is located at the upper end of the pressing plate and is connected to the pressing plate thread.

[0010] Furthermore, the upper pressure plate is also provided with a second guide rod, the second guide rod passes through the door frame and is located at the upper end of the upper pressure plate, the second guide rod is slidably connected to the door frame and is threadedly connected to the upper pressure plate.

[0011] Furthermore, the stretching mechanism also includes a support seat, a slider, a bracket, a third guide rod, a second spring, a support plate, an electromagnet, a second cylinder, and a limit rod. The support seat is located at the upper end of the frame, the support seat is slidably connected to the frame, the bracket is located at the upper end of the support seat, the bracket is threadedly connected to the support seat, the third guide rod passes through the bracket, the third guide rod is slidably connected to the bracket, the second spring is located at the outside of the third guide rod and at the upper end of the bracket, the second spring is welded to the bracket, the support plate is located at the lower end of the third guide rod, the support plate is threadedly connected to the third guide rod, the electromagnet is located at the lower end of the support plate, the electromagnet is threadedly connected to the support plate, the second cylinder is located at the outside of the slider and at the upper end of the support seat, the second cylinder is threadedly connected to the slider and the support seat, the limit rod is located at the lower end of the support plate, and the limit rod is threadedly connected to the support plate.

[0012] Furthermore, the slider is also provided with a limiting hole, the limiting hole is located at the upper end of the slider, and the limiting hole does not penetrate the slider.

[0013] Furthermore, the slider is also provided with a socket, and the socket is located on the side of the slider, and the socket does not penetrate the slider.

[0014] Compared with the prior art, the pre-pressed PET film biaxial stretching device, when working, places the PET film on the preheating plate, and draws negative pressure into the central tube through the suction hose, thereby drawing negative pressure into the main suction groove and the branch suction groove arranged on the rotating suction head, and then sucks the PET film tightly, and then the first cylinder moves downward, and the lower pressure plate flattens the highly elastic PET film under the elastic force of the first spring, and the heating tube works to heat the placing table. Since the material of the lower pressure plate is copper, which has good thermal conductivity, the heating tube heats the preheating plate while the placing table and the upper pressure plate keep the highly elastic PET film warm. The heat conducting rod transfers heat to the slider, thereby softening the PET film. Subsequently, the electromagnet is energized and attracted to the support seat, and the limit rod moves downward and extends into the limit hole, thereby pressing the PET film. Subsequently, the second cylinder pulls the slider to move in the direction away from the preheating plate, thereby stretching the PET film laterally. Subsequently, the electromagnet loses power, the spring drives the electromagnet to reset, and the cylinder pushes the slider back. Subsequently, the servo motor drives the first bevel gear to rotate through the second bevel gear, thereby driving the rotating suction head fixed to the center tube to rotate, thereby rotating the PET film. Repeating the above steps can complete the longitudinal stretching of the PET film. The device has a simple structure and can automatically stretch the PET film in both directions, greatly improving the comprehensive mechanical properties of the PET film. At the same time, the PET film is pre-pressed by a pre-pressing method, which effectively prevents the PET film from warping and deforming, improves the stretching effect, and automatically rotates the PET film to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The main view of the present invention is shown

[0016] Figure 2 A top view of the rotary suction head of the present invention is shown

[0017] Figure 3 The schematic diagram of the stretching mechanism of the present invention is shown

[0018] In the figure: frame 1, sleeve 2, preheating plate 3, heating box 4, heating tube 5, rotary suction head 6, center tube 7, adjusting nut 8, baffle 9, first bevel gear 10, servo motor 11, second bevel gear 12, heat conducting rod 13, door frame 14, first cylinder 15, upper pressure plate 16, first guide rod 17, first spring 18, lower pressure plate 19, stretching mechanism 20, main suction groove 601, branch suction groove 602, suction hose 701, silicone rubber pad 901, second guide rod 1601, support seat 2001, slider 2002, bracket 2003, third guide rod 2004, second spring 2005, support plate 2006, electromagnet 2007, second cylinder 2008, limit rod 2009, limit hole 2010, jack 2011. DETAILED DESCRIPTION

[0019] like Figure 1 , Figure 2 、 Figure 3As shown, a pre-pressed PET film biaxial stretching device includes a frame 1, a sleeve 2, a preheating plate 3, a heating box 4, a heating tube 5, a rotary suction head 6, a center tube 7, an adjusting nut 8, a baffle 9, a first bevel gear 10, a servo motor 11, a second bevel gear 12, a heat conducting rod 13, a door frame 14, a first cylinder 15, an upper pressing plate 16, a first guide rod 17, a first spring 18, a lower pressing plate 19, and a stretching mechanism 20. The sleeve 2 is located at the center of the upper end of the frame 1, the sleeve 2 is threadedly connected to the frame 1, the preheating plate 3 is located at the upper end of the sleeve 2, the preheating plate 3 is threadedly connected to the sleeve 2, the heating box 4 is located at the lower end of the preheating plate 3, the heating box 4 is threadedly connected to the preheating plate 3, and one end of the heating tube 5 extends The heating tube 5 is threadedly connected to the heating box 4, the rotary suction head 6 is located at the upper end of the preheating plate 3, and the upper end surface of the rotary suction head 6 is flush with the upper end surface of the preheating plate 3. The central tube 7 passes through the preheating plate 3 and is located at the lower end of the rotary suction head 6. The central tube 7 is threadedly connected to the preheating plate 3 and is threadedly connected to the rotary suction head 6. The adjusting nut 8 is located on the outside of the central tube 7, and the adjusting nut 8 is threadedly connected to the central tube 7. The baffle 9 is located on the outside of the central tube 7 and is located at the upper end of the adjusting nut 8. The first bevel gear 10 is located on the outside of the central tube 7, and the first bevel gear 10 is tightly connected to the central tube 7. The servo motor 11 is located at the upper end of the frame 1, and the servo motor 11 is connected to the machine frame 1. The frame 1 is threadedly connected, the second bevel gear 12 is located on the left side of the servo motor 11 and on the right side of the first bevel gear 10, the second bevel gear 12 is tightly connected to the servo motor 11 and meshed with the first bevel gear 10, the heat conducting rod 13 is located outside the preheating plate 3, the heat conducting rod 13 is tightly connected to the preheating plate 3, the door frame 14 is located at the upper end of the frame 1, the door frame 14 is threadedly connected to the frame 1, the first cylinder 15 is located at the upper end of the door frame 14, the first cylinder 15 is threadedly connected to the door frame 14, the first guide rod 17 is located through the upper pressure plate 16, the first guide rod 17 is slidably connected to the upper pressure plate 16, the first spring 18 is located at the lower end of the upper pressure plate 16, the first spring 18 is connected to The upper pressure plate 16 is welded and connected, the lower pressure plate 19 is located at the lower end of the first spring 18 and at the lower end of the first guide rod 17, the lower pressure plate 19 is threadedly connected to the first spring 18 and is threadedly connected to the first guide rod 17, the stretching mechanism 20 is located at the upper end of the frame 1, and the stretching mechanism 20 is slidably connected to the frame 1, the rotary suction head 6 is also provided with a main suction groove 601, the main suction groove 601 is located at the upper end of the rotary suction head 6, the main suction groove 601 does not penetrate the rotary suction head 6, the rotary suction head 6 is also provided with a branch suction groove 602, the branch suction groove 602 is interconnected with the main suction groove 601 cavity, the central pipe 7 is also provided with a suction hose 701, and the suction hose 701 is located at the lower end of the central pipe 7,The suction hose 701 is threadedly connected to the central tube 7, the pressing plate is also provided with a silicone rubber pad 901, the silicone rubber pad 901 is located at the upper end of the pressing plate, the silicone rubber pad 901 is threadedly connected to the pressing plate, the upper pressing plate 16 is also provided with a second guide rod 1601, the second guide rod 1601 passes through the door frame 14 and is located at the upper end of the upper pressing plate 16, the second guide rod 1601 is slidably connected to the door frame 14 and is threadedly connected to the upper pressing plate 16, the stretching mechanism 20 also includes a support seat 2001, a slider 2002, and a bracket 200 3. The third guide rod 2004, the second spring 2005, the support plate 2006, the electromagnet 2007, the second cylinder 2008, the limit rod 2009, the support seat 2001 is located at the upper end of the frame, the support seat 2001 is slidably connected to the frame, the bracket 2003 is located at the upper end of the support seat 2001, the bracket 2003 is threadedly connected to the support seat 2001, the third guide rod 2004 passes through the bracket 2003, the third guide rod 2004 is slidably connected to the bracket 2003, the second spring 2005 The second spring 2005 is welded to the bracket 2003 and is located outside the third guide rod 2004. The bracket 2006 is located at the lower end of the third guide rod 2004. The bracket 2006 is threadedly connected to the third guide rod 2004. The electromagnet 2007 is located at the lower end of the bracket 2006. The electromagnet 2007 is threadedly connected to the bracket 2006. The second cylinder 2008 is located outside the slider 2002 and is located at the upper end of the support seat 2001. The second cylinder 2008 is connected to the slider. 2002 is threadedly connected and is threadedly connected to the support seat 2001, the limiting rod 2009 is located at the lower end of the support plate 2006, the limiting rod 2009 is threadedly connected to the support plate 2006, the slider 2002 is also provided with a limiting hole 2010, the limiting hole 2010 is located at the upper end of the slider 2002, the limiting hole 2010 does not penetrate the slider 2002, the slider 2002 is also provided with a plug hole 2011, the plug hole 2011 is located on the side of the slider 2002, and the plug hole 2011 does not penetrate the slider 2002,

[0020] When the pre-pressed PET film biaxial stretching device is working, the PET film is placed on the preheating plate 3, and the central tube 7 is evacuated to a negative pressure through the suction hose 701, thereby evacuating the main suction groove 601 and the branch suction groove 602 arranged on the rotary suction head 6 to a negative pressure, and then the PET film is sucked tightly. Subsequently, the first cylinder 15 moves downward, and the lower pressing plate 11 flattens the highly elastic PET film under the elastic force of the first spring 10, and the heating tube 4 works to heat the placing table 2. Since the material of the lower pressing plate 11 is copper, it has good thermal conductivity. Therefore, while the placing table 2 and the upper pressing plate 11 keep the highly elastic PET film warm, the heating tube 5 heats the preheating plate 3, and the heat-conducting rod 13 transfers the heat to the slider 20. 02, thereby softening the PET film, then, the electromagnet 2007 is energized and attracted to the support seat 2001, and the limit rod 2009 moves downward and extends into the limit hole 2010, thereby pressing the PET film, then, the second cylinder 2008 pulls the slider 2002 to move in the direction away from the preheating plate 3, thereby stretching the PET film laterally, then, the electromagnet 2006 loses power, the spring 2004 drives the electromagnet 2006 to reset, and the cylinder 2008 pushes the slider 2002 back, then the servo motor 11 drives the first bevel gear 10 to rotate through the second bevel gear 12, thereby driving the rotary suction head 6 fixedly connected to the central tube 7 to rotate, thereby rotating the PET film, repeating the above steps, the longitudinal stretching of the PET film can be completed. The device has a simple structure, can automatically stretch the PET film in both directions, greatly improves the comprehensive mechanical properties of the PET film, and at the same time, pre-presses the PET film by pre-pressing, effectively preventing the PET film from warping and deforming, improving the stretching effect, and automatically rotating the PET film to improve work efficiency.

[0021] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A pre-pressed PET film biaxial stretching device, characterized in that It includes a frame, a sleeve, a preheating plate, a heating box, a heating tube, a rotary suction head, a center tube, an adjusting nut, a baffle, a first bevel gear, a servo motor, a second bevel gear, a heat conducting rod, a door frame, a first cylinder, an upper pressure plate, a first guide rod, a first spring, a lower pressure plate, and a stretching mechanism. The sleeve is located at the center of the upper end of the frame, the sleeve is threadedly connected to the frame, the preheating plate is located at the upper end of the sleeve, the preheating plate is threadedly connected to the sleeve, the heating box is located at the lower end of the preheating plate, the heating box is threadedly connected to the preheating plate, one end of the heating tube extends into the heating box, and the heating tube is connected to the heating The rotary suction head is located at the upper end of the preheating plate, the upper end surface of the rotary suction head is flush with the upper end surface of the preheating plate, the central tube passes through the preheating plate and is located at the lower end of the rotary suction head, the central tube is connected to the preheating plate thread and is connected to the rotary suction head thread, the adjusting nut is located outside the central tube, the adjusting nut is connected to the central tube thread, the baffle is located outside the central tube and at the upper end of the adjusting nut, the first bevel gear is located outside the central tube, the first bevel gear is tightly connected to the central tube, the servo motor is located at the upper end of the frame, and the servo motor The machine is threadedly connected to the frame, the second bevel gear is located on the left side of the servo motor and on the right side of the first bevel gear, the second bevel gear is tightly connected to the servo motor and meshed with the first bevel gear, the heat conducting rod is located outside the preheating plate, the heat conducting rod is tightly connected to the preheating plate, the door frame is located at the upper end of the frame, the door frame is threadedly connected to the frame, the first cylinder is located at the upper end of the door frame, the first cylinder is threadedly connected to the door frame, the first guide rod is located through the upper pressure plate, the first guide rod is slidably connected to the upper pressure plate, the first spring is located at the lower end of the upper pressure plate, and the first A spring is welded to the upper pressure plate, the lower pressure plate is located at the lower end of the first spring and at the lower end of the first guide rod, the lower pressure plate is threadedly connected to the first spring and to the first guide rod, the stretching mechanism is located at the upper end of the frame, and the stretching mechanism is slidably connected to the frame; the rotary suction head is also provided with a main suction groove, the main suction groove is located at the upper end of the rotary suction head, and the main suction groove does not penetrate the rotary suction head; the upper pressure plate is also provided with a second guide rod, the second guide rod penetrates the door frame and is located at the upper end of the upper pressure plate, the second guide rod is slidably connected to the door frame and is threadedly connected to the upper pressure plate.

2. The pre-pressed PET film biaxial stretching device as claimed in claim 1, characterized in that The rotary air suction head is also provided with a branch air suction groove, and the branch air suction groove is communicated with the main air suction groove cavity.

3. The pre-pressed PET film biaxial stretching device as claimed in claim 1, characterized in that The central tube is also provided with an air suction hose, which is located at the lower end of the central tube and is threadably connected to the central tube.

4. The pre-pressed PET film biaxial stretching device as claimed in claim 1, characterized in that The pressing plate is also provided with a silicone rubber pad, which is located at the upper end of the pressing plate and is connected to the pressing plate thread.

5. The pre-pressed PET film biaxial stretching device according to claim 1, characterized in that The stretching mechanism also includes a support seat, a slider, a bracket, a third guide rod, a second spring, a support plate, an electromagnet, a second cylinder, and a limit rod. The support seat is located at the upper end of the frame, the support seat is slidably connected to the frame, the bracket is located at the upper end of the support seat, the bracket is threadedly connected to the support seat, the third guide rod passes through the bracket, the third guide rod is slidably connected to the bracket, the second spring is located at the outside of the third guide rod and at the upper end of the bracket, the second spring is welded to the bracket, the support plate is located at the lower end of the third guide rod, the support plate is threadedly connected to the third guide rod, the electromagnet is located at the lower end of the support plate, the electromagnet is threadedly connected to the support plate, the second cylinder is located at the outside of the slider and at the upper end of the support seat, the second cylinder is threadedly connected to the slider and the support seat, the limit rod is located at the lower end of the support plate, and the limit rod is threadedly connected to the support plate.

6. The pre-pressed PET film biaxial stretching device as claimed in claim 5, characterized in that The slider is also provided with a limiting hole, which is located at the upper end of the slider and does not penetrate the slider.

7. The pre-pressed PET film biaxial stretching device as claimed in claim 5, characterized in that The slider is also provided with a plug hole, which is located on the side of the slider and does not penetrate the slider.

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