Embossing mechanism of a blown film machine

Abstract

This utility model discloses an embossing mechanism for a blown film machine, including a frame and at least one embossing assembly mounted on the frame. The embossing assembly includes a movable pressure roller and an embossing roller arranged horizontally side-by-side. The movable pressure roller is mounted at both ends in a longitudinal groove of the frame via sliding bearing seats, and the embossing roller is rotatably mounted at both ends on one side of the longitudinal groove. It also includes a drive component for controlling the lifting and lowering of the sliding bearing seats within the longitudinal groove. This utility model adjusts the movable pressure roller and embossing roller from an upper-lower alignment to a horizontally parallel arrangement. The frame provides lateral support to limit the horizontal position of the movable pressure roller and embossing roller, ensuring a fixed axial distance between them and guaranteeing a stable mold-feeding pressure on the plastic film. Compared to existing technologies, this utility model avoids uneven embossing or pitting depth, effectively improving product quality.

Description

Technical Field

[0001] This utility model relates to a blown film machine component, specifically an embossing mechanism for a blown film machine. Background Technology

[0002] Chinese utility model patent CN203888204U discloses an embossing device for a blown film machine. It includes two or more sets of pressure rollers and anilox rollers. The anilox roller in each set is rotatably mounted at the bottom end of a longitudinal groove on the frame. Both ends of the pressure roller in each set are mounted in the longitudinal groove of the frame via movable bearing seats, and the movable bearing seats are connected to the bottom end of the piston rod of a cylinder. The pressure rollers and anilox rollers are positioned vertically opposite each other. Driven by the cylinder, the movable bearing seats can cause the pressure rollers to contact or separate from the anilox rollers.

[0003] During operation, the plastic film blown out by the blown film machine passes between the pressure roller and the anilox roller. Then, the controller controls the cylinder to drive the pressure roller to press down onto the surface of the anilox roller, so that the plastic film can be embossed using this set of pressure rollers and anilox rollers.

[0004] However, this type of equipment still has certain drawbacks in practical applications, specifically as follows: It uses a cylinder to control the contact between the pressure roller and the anilox roller to apply mold pressure to the plastic film. Affected by factors such as the characteristics of the air supply, pipeline resistance and dynamic response, cylinder load variations, and temperature changes, the cylinder pressure typically fluctuates naturally during operation. This natural fluctuation affects the cylinder's positioning accuracy, thus making it impossible to guarantee a stable and consistent mold pressure on the plastic film. Fluctuations in mold pressure result in uneven depth of patterns or pits pressed onto the plastic film, leading to a poor feel and lower quality of the finished product. Utility Model Content

[0005] To address the aforementioned shortcomings in the existing technology, this utility model aims to provide an embossing mechanism for a blown film machine, thereby ensuring embossing quality and improving product quality.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an embossing mechanism for a blown film machine, comprising a frame and at least one set of embossing components mounted on the frame; the embossing components include a movable pressure roller and an embossing roller arranged horizontally side by side; the two ends of the movable pressure roller are mounted in the longitudinal groove of the frame through slider-type bearing seats, and the two ends of the embossing roller are rotatably mounted on one side of the longitudinal groove;

[0007] It also includes a drive component for controlling the sliding bearing seat to move up and down in the longitudinal groove.

[0008] As a limitation of this utility model, the driving component includes a cylinder mounted on the frame;

[0009] The piston rod of the cylinder extends from the top of the longitudinal groove and connects to the slider bearing seat.

[0010] As a further limitation of this utility model, the outer peripheral surface of the embossing roller has a textured surface or a raised dot pattern.

[0011] The outer circumferential surface of the movable pressure roller is a rubber layer.

[0012] As another limitation of this utility model, the frame includes a fixed frame and a movable frame;

[0013] The movable frame includes two wall panels arranged in a mirror symmetrical manner, and a movable seat mounted on the bottom of the two wall panels for driving the two wall panels to move closer to or away from the fixed frame;

[0014] The wall panel is provided with longitudinal grooves;

[0015] The two ends of the embossing roller are rotatably mounted on the fixed frame; the movable pressure roller and the driving component are mounted on the movable frame.

[0016] As a further limitation of this utility model, one movable seat is assembled at the bottom of each of the wall panels;

[0017] The movable seat includes a mounting base, a lead screw rotatably mounted on the mounting base, a guide rod mounted on the mounting base and parallel to the lead screw, a lead screw nut mounted on the lead screw, and a connecting block slidably mounted on the guide rod and fixedly connected to the lead screw nut.

[0018] The connecting block is fixedly connected to the bottom of the wall panel;

[0019] It also includes a control element for controlling the rotation of the lead screw.

[0020] As a further definition of this utility model, the control component is a handwheel assembled at the end of the lead screw.

[0021] As a further limitation of this utility model, the control component is a drive motor, and the output end of the drive motor is connected to the end of the lead screw.

[0022] By adopting the above-mentioned technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:

[0023] This invention optimizes the assembly position of the movable pressure roller and the embossing roller in an embossing mechanism. Specifically, the movable pressure roller and the embossing roller are adjusted from being vertically aligned to being horizontally side-by-side. The frame provides lateral support to restrict the horizontal position of the movable pressure roller and the embossing roller, ensuring a constant axial distance between them and guaranteeing a stable mold-feeding pressure on the plastic film. In this invention, the driving component (cylinder) only plays a lifting role during film insertion, pulling the movable pressure roller up and down; it no longer uses the driving component (cylinder) to apply downward pressure to the movable pressure roller to provide mold-feeding pressure. Therefore, compared to existing technologies, this invention avoids uneven embossing or pitting depth, effectively improving product quality. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the movable seat in the second embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the third embodiment of the present invention;

[0029] In the diagram: 1. Frame; 2. Movable pressure roller; 3. Embossing roller; 4. Sliding bearing seat; 5. Cylinder; 6. Fixed frame; 7. Movable frame; 8. Moving seat; 9. Mounting seat; 10. Lead screw; 11. Guide rod; 12. Connecting block; 13. Handwheel; 14. Drive motor. Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0031] The first embodiment of the embossing mechanism of the blown film machine disclosed in this utility model is as follows: Figure 1 As shown. The embossing mechanism includes a frame 1 and at least one set of embossing components mounted on the frame 1. The frame 1 is a conventional structure, with two mirror-symmetrical longitudinal grooves. The embossing components include a movable pressure roller 2 and an embossing roller 3, both of which are conventional structures. The outer surface of the movable pressure roller 2 is covered with a rubber layer, and the outer surface of the embossing roller 3 has a textured surface or raised dots.

[0032] Furthermore, such as Figure 1 As shown, the movable pressure roller 2 and the embossing roller 3 are arranged horizontally side by side on the frame 1. The embossing roller 3 is rotatably mounted on the frame 1 at both ends via diamond-shaped bearing seats, located on one side of the longitudinal groove; the movable pressure roller 2 is mounted in the longitudinal groove of the frame 1 at both ends via sliding block bearing seats 4. The frame 1 provides lateral support for the movable pressure roller 2 and the embossing roller 3, ensuring that the distance between their axes remains constant when they rotate in opposite directions during operation.

[0033] More specifically, it also includes a drive component for controlling the lifting and lowering of the slider-type bearing seat 4 within the longitudinal groove. In this embodiment, the drive component is a cylinder 5, but other linear actuators can also be selected depending on the situation, such as linear motors, electric telescopic rods, motor-screw coupling structures, etc. Figure 1 As shown, cylinder 5 is mounted on frame 1 via cylinder 5 mounting plate, located at the top of the longitudinal slide groove, with the piston rod of cylinder 5 pointing vertically downwards and extending into the longitudinal slide groove from the top. The piston rod of cylinder 5 is connected to slider-type bearing seat 4. By controlling the extension and retraction of cylinder 5, the slider-type bearing seat 4 can be controlled to rise and fall in the longitudinal slide groove, thereby controlling the rise and fall of movable pressure roller 2. In actual operation, by controlling movable pressure roller 2 to rise, movable pressure roller 2 separates from embossing roller 3, allowing film threading; by controlling movable pressure roller 2 to fall to the bottom of the longitudinal slide groove, movable pressure roller 2 contacts embossing roller 3 and is at the same horizontal height, allowing embossing of the plastic film.

[0034] Figure 2 This illustrates a second embodiment of the utility model. The difference between this second embodiment and the first embodiment is that the frame 1 is a split structure, including a fixed frame 6 and a movable frame 7. The bottom of the movable frame 7 is fitted with a movable seat 8 for driving the movable frame 7 closer to or further away from the fixed frame 6. In this second embodiment, the embossing roller 3 is rotatably mounted on the fixed frame 6 at both ends via diamond-shaped bearing seats. The movable roller 2, the driving component, and the slider-type bearing seat 4 are mounted on the movable frame 7. During use, by adjusting the distance between the movable frame 7 and the fixed frame 6, the axial distance between the movable roller 2 and the embossing roller 3 can be adjusted. This allows for adjustment of the mold pressure applied to the plastic film according to actual production needs, producing embossing or pitting of varying depths.

[0035] Specifically, such as Figure 2 As shown, the fixed frame 6 is basically the same in structure as the frame 1 in the first embodiment, except that the fixed frame 6 does not have a longitudinal sliding groove. The movable frame 7 includes two radially symmetrical wall plates, and each wall plate is equipped with a movable seat 8 at its bottom for driving the wall plate closer to or away from the fixed frame 6. Each wall plate of the movable frame 7 has a longitudinal sliding groove for assembling the movable pressure roller 2 and the slider bearing seat 4.

[0036] The movable seat 8 is a linear movement structure based on the ball screw 10. For example... Figure 3 As shown, the movable base 8 includes a mounting base 9, a lead screw 10, a guide rod 11, a lead screw nut, and a connecting block 12. The mounting base 9 is used for fixing the device on the blown film machine. The two ends of the lead screw 10 are rotatably mounted on the mounting base 9 via bearings. The guide rod 11 is fixed on the mounting base 9 and parallel to the lead screw 10. In this embodiment, two guide rods 11 are provided, located on opposite sides of the lead screw 10. The lead screw nut is mounted on the lead screw 10. The connecting block 12 is slidably mounted on the guide rod 11 and fixedly connected to the lead screw nut. The connecting block 12 is fixedly connected to the bottom of the aforementioned wall panel.

[0037] To control the rotation of the lead screw 10, a control component is also mounted on one end of the lead screw 10. In this embodiment, the control component is a handwheel 13. That is, the operator can control the movement of the wall panel through the handwheel 13.

[0038] Figure 4 A third embodiment of the utility model is shown. The difference between this third embodiment and the second embodiment is that the control component is a drive motor 14. The output end of the drive motor 14 is connected to the end of the lead screw 10. The operator can control the movement of the wall panel by controlling the forward or reverse rotation of the drive motor 14.

[0039] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An embossing mechanism for a blown film machine, comprising a frame and at least one set of embossing components mounted on the frame; characterized in that: The embossing assembly includes a movable pressure roller and an embossing roller arranged horizontally side by side; the two ends of the movable pressure roller are mounted in the longitudinal groove of the frame through slider-type bearing seats, and the two ends of the embossing roller are rotatably mounted on one side of the longitudinal groove; It also includes a drive component for controlling the sliding bearing seat to move up and down in the longitudinal groove.

2. The embossing mechanism of a blown film machine according to claim 1, characterized in that: The drive component includes a cylinder mounted on the frame; The piston rod of the cylinder extends from the top of the longitudinal groove and connects to the slider bearing seat.

3. The embossing mechanism of a blown film machine according to claim 2, characterized in that: The outer circumferential surface of the embossing roller has a textured surface or a raised dot pattern. The outer circumferential surface of the movable pressure roller is a rubber layer.

4. The embossing mechanism of a blown film machine according to any one of claims 1-3, characterized in that: The frame includes a fixed frame and a movable frame; The movable frame includes two wall panels arranged in a mirror symmetrical manner, and a movable seat mounted on the bottom of the two wall panels for driving the two wall panels to move closer to or away from the fixed frame; The wall panel is provided with longitudinal grooves; The two ends of the embossing roller are rotatably mounted on the fixed frame; the movable pressure roller and the driving component are mounted on the movable frame.

5. The embossing mechanism of a blown film machine according to claim 4, characterized in that: One of the movable seats is assembled at the bottom of each of the wall panels; The movable seat includes a mounting base, a lead screw rotatably mounted on the mounting base, a guide rod mounted on the mounting base and parallel to the lead screw, a lead screw nut mounted on the lead screw, and a connecting block slidably mounted on the guide rod and fixedly connected to the lead screw nut. The connecting block is fixedly connected to the bottom of the wall panel; It also includes a control element for controlling the rotation of the lead screw.

6. The embossing mechanism of a blown film machine according to claim 5, characterized in that: The control component is a handwheel mounted on the end of the lead screw.

7. The embossing mechanism of a blown film machine according to claim 5, characterized in that: The control component is a drive motor, and the output end of the drive motor is connected to the end of the lead screw.

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