Roll shaft mechanism for transversely unfolding film

Abstract

The roll shaft mechanism comprises a main shaft, a first roll shaft and two second roll shafts, the first roll shaft and the two second roll shafts are arranged outside the main shaft in a sleeved mode, a one-way bearing is arranged outside one end of the main shaft in a sleeved mode, and the two second roll shafts are symmetrically arranged and located at the two ends of the first roll shaft respectively. A gap is formed between each second roll shaft and the end of the first roll shaft, a guide sleeve is arranged at the end, away from the first roll shaft, of each second roll shaft, the guide sleeves are fixedly connected with the main shaft, and each second roll shaft is rotatably and slidably connected with the corresponding guide sleeve. According to the roll shaft mechanism disclosed by the utility model, the second roll shaft, the guide sleeve and the one-way bearing are arranged and all the parts are matched with one another, so that the local part of the roll shaft mechanism can move in the transverse direction, an expanded thin film can be unfolded in the transverse direction, wrinkles are reduced or eliminated, the quality of a mold closing and forming product is ensured, and the production efficiency is improved. And the packaging yield and the production efficiency of the product are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of semiconductor packaging equipment, and in particular relates to a roller mechanism for horizontally unfolding a film. Background Art

[0002] On the existing packaging equipment, a film used to separate the product from the mold can be installed for the upper cavity of the mold, which is called the upper separation film. The temperature of the mold is high during normal operation (generally above 100°C), but when the separation film enters the mold, the temperature is low (generally below 40°C), so thermal expansion will occur. In addition, the running direction of the separation membrane is from the front of the mold to the back of the mold (longitudinal), and it moves with the rolling of the cylindrical roller. Therefore, the separation membrane has a certain tension in the front and back directions of the mold, which can absorb the deformation of the film after expansion, but there are no moving parts in the left and right directions of the mold. At this time, after the mold is closed and packaged, the film expands and sticks to the mold, which will produce excess wrinkles, and eventually the resin during packaging will overflow from the gaps in the wrinkles, resulting in defects or failures in the packaging, thereby reducing the yield of the product. Utility Model Content

[0003] In view of this, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a roller mechanism for horizontally unfolding a film, so that the film can be stretched in left and right directions after expansion to reduce or eliminate the generation of wrinkles.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A roller mechanism for horizontally unfolding a film comprises a main shaft, a first roller sleeved outside the main shaft and two second rollers, wherein a one-way bearing is sleeved outside one end of the main shaft, and the two second rollers are symmetrically arranged and respectively located at the two ends of the first roller, and a gap is provided between each of the second rollers and the end of the first roller, and a guide sleeve is provided at the end of each of the second rollers away from the first roller, and the guide sleeve is fixedly connected to the main shaft, and one of the second rollers is rotatably and slidably connected to a corresponding one of the guide sleeves.

[0006] According to some preferred implementation aspects of the utility model, the main shaft includes a first shaft portion, a second shaft portion located at both ends of the first shaft portion, and a third shaft portion located at one end of the second shaft portion away from the first shaft portion, and the axial center lines of the first shaft portion, the second shaft portion and the third shaft portion coincide.

[0007] According to some preferred implementation aspects of the utility model, the first roller is sleeved on the outside of the first shaft portion and the length of the first roller is greater than the length of the first shaft portion, the center lines of the first roller and the first shaft portion coincide, and the distances from both ends of the first roller to the corresponding ends of the second roller are equal.

[0008] According to some preferred implementation aspects of the utility model, a second roller and a corresponding guide sleeve are both arranged outside a second shaft portion, and roller bushings are sleeved on the outside of the two second shaft portions, and the roller bushings are used to make the second roller rotate along the circumferential direction of the main shaft and slide along the axial direction of the main shaft; a second roller is fixedly provided with a fixing ring at one end away from the first roller, and the fixing ring is sleeved on the outside of the second shaft portion. In some embodiments of the utility model, the film is wrapped around the roller mechanism at a certain angle, and moves from front to back under the pulling force of the servo motor, and drives the first roller, the second roller and the main shaft to rotate, which is forward rotation. During forward rotation, the main shaft and the first roller sleeved on the outside rotate at the same time. When the main shaft cannot be reversed under the action of the one-way bearing, the first roller will rotate relative to the main shaft.

[0009] According to some preferred implementation aspects of the utility model, two rollers are provided on the side wall of each of the fixing rings, and a line connecting the centers of the two rollers coincides with a diameter of the fixing ring.

[0010] According to some preferred implementation aspects of the utility model, a cavity is opened in the guide sleeve from one end close to the second roller to the other end, and the cavity is used to accommodate the fixing ring and part of the second roller. The length of the cavity is smaller than the length of the guide sleeve.

[0011] According to some preferred implementation aspects of the utility model, the side wall of the guide sleeve is provided with two slide grooves corresponding to the two rollers, the slide grooves are connected to the cavity, the slide grooves are used for a corresponding roller to slide along the length direction of the slide grooves, and the connecting line between the centers of the two slide grooves on each guide sleeve is perpendicular to and intersects with the axis of the guide sleeve. The two ends of the slide grooves can limit the sliding of each corresponding roller inside them.

[0012] According to some preferred implementation aspects of the utility model, the slide groove is arranged obliquely, the spiral direction of the two slide grooves on each guide sleeve is the same, and the corresponding slide grooves on the two guide sleeves are arranged symmetrically.

[0013] According to some preferred implementation aspects of the utility model, an elastic member is arranged in the cavity, the elastic member is sleeved on the outer periphery of the second shaft portion, one end of the elastic member abuts against the end of the fixing ring, the other end of the elastic member abuts against the inner wall of the end of the guide sleeve away from the fixing ring, and the elastic member is in a compressed state. The arrangement of the elastic member can ensure that the second roller is smoothly reset after moving in the direction close to the guide sleeve.

[0014] According to some preferred implementation aspects of the utility model, the one-way bearing sleeve is arranged on the outside of one of the third shaft parts, and the one-way bearing is used to make the main shaft rotate clockwise or counterclockwise. In some embodiments of the utility model, under normal circumstances, the film is gradually transmitted and moved from top to bottom and from front to back, bypassing the first roller and the second rollers on both sides. Since there is a certain friction between the rollers and the film, the rollers will rotate (positive rotation) as the film is transmitted. Since the second rollers on the left and right sides are fixedly connected to the fixed ring, the second rollers and the fixed ring will rotate at the same time and drive the guide sleeve to rotate, and the guide sleeve and the main shaft are also fixedly connected, so the main shaft will also rotate together (positive rotation). The purpose of setting the one-way bearing is to ensure that the main shaft cannot be reversed, so that the guide sleeve is locked, and the second roller and the fixed ring will rotate relative to the guide sleeve, and through the cooperation of the slide groove on the guide sleeve and the roller on the fixed ring, the second roller and the fixed ring will slide relative to the guide sleeve, and move to the two ends of the main shaft respectively, so as to unfold the tightly attached and stretched film to both sides, so as to achieve the effect of relaxation, flattening, reducing or eliminating wrinkles.

[0015] Due to the adoption of the above technical scheme, compared with the prior art, the utility model has a roller mechanism for laterally unfolding a film, and through the arrangement of a second roller, a guide sleeve and a one-way bearing and the mutual cooperation between various components, a part of the roller mechanism can be moved laterally, so that the expanded film can be unfolded laterally to reduce or eliminate the generation of wrinkles, thereby ensuring the quality of the molded product and improving the packaging yield and production efficiency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the film being transmitted between two roller mechanisms in the preferred embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the top view of the roller mechanism in the preferred embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of a partial cross-sectional structure of a roller mechanism in a preferred embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the main structure of the roller mechanism in the preferred embodiment of the utility model after the guide sleeve is omitted;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the guide sleeve in the preferred embodiment of the utility model;

[0022] Wherein, the accompanying drawings are marked as follows:

[0023] Main shaft -1, first shaft portion -11, second shaft portion -12, third shaft portion -13, first roller shaft -2, second roller shaft -3, guide sleeve -4, cavity -41, slide groove -42, fixing ring -5, one-way bearing -61, first rolling bearing -62, second rolling bearing -63, roller bushing -71, protective sleeve -72, roller -8, elastic member -9, film -10. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] Reference Figures 1 to 5 In this embodiment, a roller mechanism for horizontally unfolding a film is provided. When conveying a film 10, two roller mechanisms are provided, one in front and one in the back. One end of the film 10 is wrapped around the outer wall of the roller mechanism at a certain angle, and conveyed from front to back under the pulling force of the servo motor. The roller mechanism includes a main shaft 1, a first roller 2 sleeved outside the main shaft 1, and two second rollers 3. The two second rollers 3 are symmetrically arranged and respectively located at the two ends of the first roller 2. There is a gap between each second roller 3 and the end of the first roller 2; a guide sleeve 4 is provided at one end of each second roller 3 away from the first roller 2. The axis center lines of the main shaft 1, the first roller 2, the second roller 3, and the guide sleeve 4 all coincide.

[0026] Furthermore, if Figure 1As shown, the main shaft 1 includes a first shaft portion 11, a second shaft portion 12 located at both ends of the first shaft portion 11, and a third shaft portion 13 located at one end of the second shaft portion 12 away from the first shaft portion 11. The first shaft portion 11, the second shaft portion 12 and the third shaft portion 13 are integrally formed, and the axis center lines of the first shaft portion 11, the second shaft portion 12 and the third shaft portion 13 coincide. A one-way bearing 61 is sleeved on the outside of one third shaft portion 13, and a first rolling bearing 62 is sleeved on the outside of the other third shaft portion 13.

[0027] Specifically, the end of the second shaft portion 12 connected to the first shaft portion 11 is also provided with a second rolling bearing 63, and the first roller 2 is sleeved on the outside of the first shaft portion 11 and the first roller 2 can cooperate with the second rolling bearing 63. When the roller mechanism rotates forward, the main shaft 1 and the first roller 2 sleeved on the outside rotate at the same time; when the one-way bearing 61 prevents the main shaft 1 from reversing, the first roller 2 will rotate relative to the main shaft 1. In addition, the length of the first roller 2 is greater than the length of the first shaft portion 11, the axis center lines of the first roller 2 and the first shaft portion 11 coincide, and the distances from the two ends of the first roller 2 to the corresponding ends of the second roller 3 are equal.

[0028] The outside of the two second shaft portions 12 are sleeved with roller bushings 71, a second roller 3 and a corresponding guide sleeve 4 are both arranged outside a second shaft portion 12, and a second roller 3 is sleeved on the outer periphery of a corresponding roller bushing 71, so that the second roller 3 can rotate along the circumference of the main shaft 1 and can slide along the axial direction of the main shaft 1. A fixing ring 5 is fixedly arranged at one end of a second roller 3 away from the first roller 2, and the fixing ring 5 is sleeved outside the second shaft portion 12, and the fixing ring 5 and the second roller 3 act simultaneously. Two rollers 8 are arranged on the side wall of each fixing ring 5, and the line connecting the centers of the two rollers 8 coincides with a diameter of the fixing ring 5.

[0029] Further, as shown in the figure, the guide sleeve 4 is fixedly connected to the second shaft portion 12, and a cavity 41 is opened in each guide sleeve 4 along one end close to the second roller shaft 3 to the other end, and the length of the cavity 41 is less than the length of the guide sleeve 4, and the cavity 41 is used to accommodate the fixing ring 5 and part of the second roller shaft 3. An elastic member 9 is arranged in the cavity 41 of each guide sleeve 4, and the elastic member 9 is sleeved on the outer periphery of the second shaft portion 12, one end of the elastic member 9 abuts against the end of the fixing ring 5, and the other end of the elastic member 9 abuts against the inner wall of the end of the guide sleeve 4 away from the fixing ring 5, and the elastic member 9 is always in a compressed state. In this embodiment, a protective sleeve 72 is sleeved on the outer periphery of the elastic member 9 arranged on the second shaft portion 12, and then the elastic member 9 is sleeved on the outer periphery of the protective sleeve 72 and the elastic member 9 is tightly attached to the outer periphery of the protective sleeve 72. The provision of the protective sleeve 72 ensures that the elastic member 9 will only expand and contract along the length direction of the main shaft 1, and will not shake arbitrarily relative to the second shaft portion 12. The elastic member 9 of this embodiment is preferably a spring.

[0030] The side wall of each guide sleeve 4 is provided with two slide grooves 42 corresponding to the two rollers 8. The slide grooves 42 are connected to the cavity 41. The connecting line between the centers of the two slide grooves 42 on each guide sleeve 4 is perpendicular to and intersects with the axis of the guide sleeve 4. One slide groove 42 is used for a corresponding roller 8 to slide along its length direction, and the two ends of the slide groove 42 can limit the sliding of each corresponding roller 8 inside it. Specifically, the slide grooves 42 are all arranged obliquely, the spiral directions of the two slide grooves 42 on each guide sleeve 4 are the same, and the corresponding slide grooves 42 on the two guide sleeves 4 are arranged symmetrically.

[0031] The working process of the roller mechanism for horizontally unfolding the film 10 of the utility model is as follows:

[0032] Under normal circumstances, the film 10 is gradually conveyed and moved from top to bottom and from front to back, bypassing the first roller 2 and the second rollers 3 on both sides. Since there is a certain friction between the rollers and the film 10, the rollers will rotate (forward) as the film 10 is conveyed. Since the second rollers 3 on the left and right sides are fixedly connected to the fixed ring 5, the second rollers 3 and the fixed ring 5 will rotate at the same time and drive the guide sleeve 4 to rotate. The guide sleeve 4 and the main shaft 1 are also fixedly connected, so the main shaft 1 will also rotate together (forward), thereby conveying the film 10 from front to back.

[0033] When the film 10 is heated and expands to a certain extent in the horizontal direction (perpendicular to the conveying direction), an external force is required to unfold it in the horizontal direction to ensure its flatness. At this time, the motor will reverse, pulling the film 10 to reverse from back to front and from bottom to top, and the first roller 2 and the second rollers 3 on both sides will also reverse together under the drive of the film 10. At this time, the main shaft 1 that originally rotated forward together is locked under the action of the one-way bearing 61, causing the main shaft 1 to be unable to reverse, thereby making the guide sleeve 4 unable to reverse, and the second rollers 3 on both sides will rotate relative to the guide sleeve 4. During the relative rotation of the second rollers 3, the rollers 8 on the fixed ring 5 will be driven to slide along the corresponding slide grooves 42 on the guide sleeve 4 along its length direction, so that the second rollers 3 move in the direction away from the first roller 2. In the process of the two second rollers 3 moving in the direction away from the first roller 2 at the same time, the stretched film 10 that is tightly attached to the roller mechanism will be unfolded to both sides, so that the film 10 can achieve a relaxed and flat effect, thereby reducing or eliminating wrinkles.

[0034] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A roller mechanism for horizontally unfolding a film, characterized in that: It includes a main shaft, a first roller shaft sleeved on the outside of the main shaft and two second roller shafts, wherein a one-way bearing is sleeved on the outside of one end of the main shaft, and the two second roller shafts are symmetrically arranged and respectively located at the two ends of the first roller shaft, and there is a gap between each of the second roller shafts and the end of the first roller shaft, and a guide sleeve is arranged at the end of each of the second roller shafts away from the first roller shaft, and the guide sleeve is fixedly connected to the main shaft, and one of the second roller shafts is rotatably and slidably connected to a corresponding one of the guide sleeves.

2. The roller mechanism according to claim 1, characterized in that: The main shaft includes a first shaft portion, a second shaft portion located at both ends of the first shaft portion, and a third shaft portion located at an end of the second shaft portion away from the first shaft portion, and the axis center lines of the first shaft portion, the second shaft portion and the third shaft portion coincide with each other.

3. The roller mechanism according to claim 2, characterized in that: The first roller is sleeved on the outside of the first shaft portion and the length of the first roller is greater than the length of the first shaft portion. The axis lines of the first roller and the first shaft portion coincide with each other, and the distances from both ends of the first roller to the corresponding ends of the second roller are equal.

4. The roller mechanism according to claim 2, characterized in that: A second roller and a corresponding guide sleeve are both arranged on the outside of a second shaft portion, and roller bushings are sleeved on the outside of the two second shaft portions. The roller bushings are used to enable the second roller to rotate along the circumferential direction of the main shaft and to slide along the axial direction of the main shaft; a fixing ring is fixedly provided on the end of the second roller away from the first roller, and the fixing ring is sleeved on the outside of the second shaft portion.

5. The roller mechanism according to claim 4, characterized in that: Two rollers are arranged on the side wall of each fixing ring, and the connecting line between the centers of the two rollers coincides with a diameter of the fixing ring.

6. The roller mechanism according to claim 5, characterized in that: A cavity is provided in the guide sleeve from one end close to the second roller to the other end thereof, the cavity being used to accommodate the fixing ring and part of the second roller, and the length of the cavity is smaller than the length of the guide sleeve.

7. The roller mechanism according to claim 6, characterized in that: The side wall of the guide sleeve is provided with two slide grooves corresponding to the two rollers, the slide grooves are connected to the cavity, the slide grooves are used for allowing a corresponding roller to slide along the length direction of the slide grooves, and the connecting line between the centers of the two slide grooves on each guide sleeve is perpendicular to and intersects with the axial center line of the guide sleeve.

8. The roller mechanism according to claim 7, characterized in that: The slide groove is arranged obliquely, the spiral directions of the two slide grooves on each guide sleeve are the same, and the corresponding slide grooves on the two guide sleeves are arranged symmetrically.

9. The roller mechanism according to claim 6, characterized in that: An elastic member is arranged in the cavity, and the elastic member is sleeved on the outer periphery of the second shaft portion. One end of the elastic member abuts against the end of the fixing ring, and the other end of the elastic member abuts against the inner wall of the guide sleeve away from the fixing ring. The elastic member is in a compressed state.

10. The roller mechanism according to claim 2, characterized in that: The one-way bearing is sleeved outside one of the third shaft parts, and the one-way bearing is used to make the main shaft rotate clockwise or counterclockwise.

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