Heat transfer film unwinding roller assembly mechanism

Abstract

This utility model relates to a heat transfer film unwinding roller assembly mechanism, including a frame. The upper left corner of the frame is an unwinding station with an unwinding roller, and the lower right corner is a heat transfer station. Several rotating rollers are arranged on the frame between the unwinding and heat transfer stations. Each rotating roller is mounted on a long, narrow roller frame. Each roller frame has long grooves and is locked to the frame by a first bolt passing through the groove. The long grooves on the roller frames are connected as a single unit by a reinforcing rod. After the reinforcing rod is connected, the moment of inertia of the overall frame section is significantly increased (compared to the slender section of a single roller frame), and the reinforcing rod can be considered a "lateral stiffener," combining the longitudinal stiffness of multiple roller frames with the lateral stiffness of the reinforcing rod to form a composite support system similar to a "truss structure." This structure effectively improves the system's resistance to bending and torsional deformation, thereby reducing the torque effect of the lower heavy-load area on the top locking end and reducing the physical basis for sway.

Description

Technical Field

[0001] This utility model relates to a heat transfer film unwinding roller assembly mechanism. Background Technology

[0002] In industries such as food, chemicals, and pharmaceuticals, oil bottles serve as the primary packaging containers for liquid products. The clarity and stability of their surface markings (such as brand information, specifications, and shelf life) directly impact market acceptance and distribution safety. Heat transfer printing technology, with its advantages of strong image adhesion, high printing precision, and high production efficiency, has become one of the core processes for achieving surface marking in automated oil bottle production lines. This technology transfers the graphic information on a transfer film to the bottle surface under heat and pressure, relying on the precise delivery and positioning of the transfer film to ensure accurate adhesion between the graphics and the bottle.

[0003] The transfer film conveying system of existing oil bottle heat transfer equipment typically consists of a transfer film roll, conveying rollers, a heat transfer station, and a drive mechanism. To adapt to the production line layout and transfer process requirements, the transfer film roll is generally installed in the unwinding mechanism at the upper left corner of the equipment, while the heat transfer station is correspondingly located on the bottle conveying path at the lower right corner. The two are connected by multiple sets of parallel conveying rollers to achieve continuous conveying of the transfer film. These conveying rollers need to be supported by a mounting carrier to ensure the tension and stability of the transfer film during conveying. This carrier is usually designed as a long, narrow "roller frame"—its upper locking end is fixedly connected to the equipment frame via bolts, clips, or other locking structures, while the bottom end is fitted with the conveying rollers, forming an inclined / vertical arrangement (to match the spatial height difference between the transfer film roll and the heat transfer station).

[0004] However, in practical applications, the aforementioned roller frame structure exhibits significant stability defects. Specifically, to cover the transmission distance from the transfer film roll to the heat transfer station, the roller frame is typically designed as a long strip structure. Due to the staggered vertical arrangement of the transfer film roll and the transfer station, the roller frame frequently needs to be adjusted to an inclined position. Furthermore, when the height difference between the transfer film roll and the transfer station is significant, the locking end at the top of the roller frame is quite far from the roller below. In this case, the stress characteristics of the roller frame are as follows: the top locking end is a fixed fulcrum, while the lower part, due to the installation of the transmission roller (each roller weighs 5-15 kg) and bearing the continuous tension of the transfer film, forms a "cantilever beam" structure with "fixed at the top and heavy load at the bottom."

[0005] During prolonged continuous operation of the equipment (average daily operating time of 8-16 hours), the heavy-load area under the roller frame experiences a continuous torque on the top locking end due to factors such as gravity, dynamic tension fluctuations of the transfer film, and equipment vibration. Because of the large distance between the top locking end and the lower roller, the rigid support capacity of the roller frame is weakened, making it prone to swaying around the locking end. This swaying directly causes the axis of the transmission roller to shift, disrupting the preset conveying path of the transfer film and leading to alignment deviations between the transfer film and the bottle body at the heat transfer station. This results in quality problems such as blurred images, misalignment, and even wrinkles and breakage of the transfer film, increasing the frequency of downtime maintenance and severely restricting the stability of the production line and the product qualification rate.

[0006] Therefore, optimizing the structural design of the roller frame to suppress swaying has become a key technical challenge in improving the operational stability and marking accuracy of oil bottle heat transfer equipment. Utility Model Content

[0007] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a heat transfer film unwinding roller assembly mechanism.

[0008] To solve the above-mentioned technical problems, the technical solution of this utility model is: a heat transfer film unwinding roller assembly mechanism, including a frame, the upper left corner of the frame is an unwinding station and an unwinding roller is provided thereon, the lower right corner of the frame is a heat transfer station, a number of rotating rollers are provided on the frame between the unwinding station and the heat transfer station, the rotating rollers are all mounted on long strip-shaped roller frames, the roller frames are all provided with long grooves and are locked to the frame by a first bolt passing through the long grooves, the long grooves on the multiple roller frames are fixedly connected as a whole by a reinforcing connecting rod, and the reinforcing connecting rod is also provided with long grooves.

[0009] Preferably, the unwinding roller is mounted on an unwinding roller frame for rotating unwinding, and the unwinding roller frame is fixedly connected to the left end of the frame.

[0010] Preferably, a guide roller is also installed on the left side of the frame at the lower left corner of the unwinding roller.

[0011] Preferably, the rollers are located below the unwinding roller and to the left of the heat transfer station.

[0012] Preferably, the frame has a plurality of internal threaded holes from left to right for screwing into the first bolts of the long groove of the roller frame.

[0013] Preferably, the reinforcing link is also long and narrow, with a second bolt inserted between the long groove on it and the long groove of the roller frame, and the second bolt is then screwed with a second nut for locking.

[0014] Preferably, the roller frame is composed of two sections, namely an upper long rod and a lower short rod. A corresponding through hole is provided between the bottom end of the upper long rod and the top end of the lower short rod, and a third bolt is threaded through the through hole, and a third nut is screwed onto the third bolt.

[0015] Preferably, the rotating roller is rotatably connected to the bottom end of the lower short rod.

[0016] Preferably, the long groove of the roller frame is arranged on the upper long rod.

[0017] Preferably, the width of the groove in the roller frame is the same as the width of the long groove in the reinforcing link.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The original single roller frame was an independent cantilever beam structure with a "fixed upper part and heavy load lower part" (the top locking end was a fixed fulcrum, and the lower part was a heavy load end due to the weight of the roller and the tension of the transfer film). Its rigid support capacity was weak, and it was prone to swaying around the locking end due to excessive cantilever length (large distance between the locking end and the roller). After connecting multiple roller frames laterally with reinforcing rods, the multiple independent roller frames were integrated into a single frame structure, rather than being independently stressed. At this point, the swaying of a single roller frame was no longer an independent movement, but rather had to overcome the overall rigid constraint of the entire frame. The reinforcing rods, as lateral connecting components, could transmit the swaying tendency of a single roller frame to adjacent roller frames. The rigid support of adjacent roller frames (whose tops were also fixed to the equipment frame) created a "mutual restraint," significantly reducing the independent swaying amplitude of a single roller frame.

[0019] 2. After the reinforcement links are connected, the moment of inertia of the overall frame section increases significantly (compared to the slender section of a single roller frame), and the reinforcement links can be regarded as "lateral stiffeners," combining the longitudinal stiffness of multiple roller frames with the lateral stiffness of the reinforcement links to form a composite support system similar to a "truss structure." This structure can effectively improve the system's resistance to bending and torsional deformation, thereby reducing the torque effect of the lower heavy-load area on the top locking end and reducing the physical basis for sway.

[0020] 3. During equipment operation, the causes of roller frame sway include: static load from the weight of the rollers, dynamic fluctuations in the tension of the transfer film (such as tension changes during acceleration / deceleration), and periodic excitation from equipment vibration. Because a single roller frame is subjected to independent force, it is prone to "amplified response" to these loads (such as resonance or cumulative deformation). After reinforcement with connecting rods, dynamic loads and vibration energy can be transferred and dispersed among multiple roller frames through the reinforcement connecting rods. ① Static load dispersion: The weight of the rotating roller of a single roller frame is transferred to the adjacent roller frames through the reinforcing connecting rod, so that the original "single heavy load" is transformed into "multiple rollers cooperating to bear the load", reducing the local stress peak of a single roller frame; ② Dynamic tension buffer: When the tension of the transfer film fluctuates, the instantaneous tension on a certain roller frame can be transmitted to the overall frame through the reinforcing link. The overall elastic deformation of the frame absorbs the fluctuation energy, avoiding severe swaying of a single roller frame due to sudden tension changes. ③ Vibration suppression: The excitation frequency of equipment operation vibration is "filtered" by the high rigidity of the overall frame, avoiding resonance of a single roller frame due to the natural frequency being close to the excitation frequency, and reducing periodic sway.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0023] In the diagram: 1. Frame; 2. Unwinding roller; 3. Heat transfer station; 4. Rotating roller; 5. Roller frame; 6. Long groove; 7. First bolt; 8. Reinforcing rod; 9. Unwinding roller frame; 10. Guide roller; 11. Internal threaded hole; 12. Second bolt; 13. Upper long rod; 14. Lower short rod; 15. Third bolt; 16. Heat transfer film. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] like Figure 1 As shown, this embodiment provides a heat transfer film unwinding roller assembly mechanism, including a frame 1. The upper left corner of the frame is an unwinding station with an unwinding roller 2. The lower right corner of the frame is a heat transfer station 3. Several rotating rollers 4 are arranged on the frame between the unwinding station and the heat transfer station. The rotating rollers are all mounted on long strip-shaped roller frames 5. Each roller frame has long grooves 6 and is locked to the frame by a first bolt 7 passing through the long grooves. The long grooves on the roller frames are fixedly connected as a whole by a reinforcing rod 8, and the reinforcing rod is also provided with long grooves.

[0028] In this embodiment of the invention, the unwinding roller is mounted on the unwinding roller frame 9 for rotating unwinding, and the unwinding roller frame is fixedly connected to the left end of the frame.

[0029] In this embodiment of the present invention, a guide roller 10 is also installed on the left side of the frame at the lower left corner of the unwinding roller.

[0030] The heat transfer film 16 on the unwinding roller first passes through the left side of the guide roller and is wound downwards, and then wound on the corresponding rotating rollers in the order of "lower side, upper side, lower side..." from left to right, until the heat transfer film reaches the heat transfer station.

[0031] In this embodiment of the invention, several rotating rollers are located below the unwinding roller and to the left of the heat transfer station.

[0032] In this embodiment of the utility model, the frame is provided with a plurality of internal threaded holes 11 from left to right for screwing with the first bolts of the long groove of the roller frame.

[0033] In this embodiment of the utility model, the reinforcing connecting rod is also long and narrow, with a second bolt 12 inserted between the long groove on it and the long groove of the roller frame, and the second bolt is then screwed with a second nut for locking.

[0034] In this embodiment of the utility model, the roller frame is composed of two sections, namely an upper long rod 13 and a lower short rod 14. A corresponding through hole is provided between the bottom end of the upper long rod and the top end of the lower short rod, and a third bolt 15 is threaded through the through hole, and a third nut is screwed onto the third bolt.

[0035] When multiple roller frames are laterally connected by reinforcing rods, the individual roller frames are integrated into a single frame structure. During equipment operation, if it is necessary to temporarily adjust the sway position of a certain roller, it is not necessary to disassemble the reinforcing rods. Simply loosen or tighten the corresponding third bolt and third nut of the roller to change the sway angle of the lower short rod relative to the upper long rod.

[0036] In this embodiment of the invention, the rotating roller is rotatably connected to the bottom end of the lower short rod.

[0037] In this embodiment of the invention, the long groove of the roller frame is arranged on the upper long rod.

[0038] In this embodiment of the invention, the groove width of the roller frame and the long groove of the reinforcing connecting rod are the same.

[0039] In this embodiment of the invention, the main improvement of the heat transfer film unwinding roller assembly mechanism lies in the fact that the long grooves on several roller frames are fixedly connected as a whole by a reinforcing connecting rod, which enables the following: 1. The original single roller frame was an independent cantilever beam structure with a "fixed upper part and heavy load lower part" (the top locking end was a fixed fulcrum, and the lower part was a heavy load end due to the weight of the roller and the tension of the transfer film). Its rigid support capacity was weak, and it was prone to swaying around the locking end due to excessive cantilever length (large distance between the locking end and the roller). After connecting multiple roller frames laterally with reinforcing rods, the multiple independent roller frames were integrated into a single frame structure, rather than being independently stressed. At this point, the swaying of a single roller frame was no longer an independent movement, but rather had to overcome the overall rigid constraint of the entire frame. The reinforcing rods, as lateral connecting components, could transmit the swaying tendency of a single roller frame to adjacent roller frames. The rigid support of adjacent roller frames (whose tops were also fixed to the equipment frame) created a "mutual restraint," significantly reducing the independent swaying amplitude of a single roller frame.

[0040] 2. After the reinforcement links are connected, the moment of inertia of the overall frame section increases significantly (compared to the slender section of a single roller frame), and the reinforcement links can be regarded as "lateral stiffeners," combining the longitudinal stiffness of multiple roller frames with the lateral stiffness of the reinforcement links to form a composite support system similar to a "truss structure." This structure can effectively improve the system's resistance to bending and torsional deformation, thereby reducing the torque effect of the lower heavy-load area on the top locking end and reducing the physical basis for sway.

[0041] 3. During equipment operation, the causes of roller frame sway include: static load from the weight of the rollers, dynamic fluctuations in the tension of the transfer film (such as tension changes during acceleration / deceleration), and periodic excitation from equipment vibration. Because a single roller frame is subjected to independent force, it is prone to "amplified response" to these loads (such as resonance or cumulative deformation). After reinforcement with connecting rods, dynamic loads and vibration energy can be transferred and dispersed among multiple roller frames through the reinforcement connecting rods. ① Static load dispersion: The weight of the rotating roller of a single roller frame is transferred to the adjacent roller frames through the reinforcing connecting rod, so that the original "single heavy load" is transformed into "multiple rollers cooperating to bear the load", reducing the local stress peak of a single roller frame; ② Dynamic tension buffer: When the tension of the transfer film fluctuates, the instantaneous tension on a certain roller frame can be transmitted to the overall frame through the reinforcing link. The overall elastic deformation of the frame absorbs the fluctuation energy, avoiding severe swaying of a single roller frame due to sudden tension changes. ③ Vibration suppression: The excitation frequency of equipment operation vibration is "filtered" by the high rigidity of the overall frame, avoiding resonance of a single roller frame due to the natural frequency being close to the excitation frequency, and reducing periodic sway.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A heat transfer film unwinding roller assembly mechanism, characterized in that: The machine includes a frame, with an unwinding station at the upper left corner and an unwinding roller thereon, and a heat transfer station at the lower right corner. Several rotating rollers are arranged on the frame between the unwinding station and the heat transfer station. The rotating rollers are all mounted on long strip-shaped roller frames. Each roller frame has long grooves and is locked to the frame by a first bolt passing through the long groove. The long grooves on the roller frames are fixedly connected as a whole by a reinforcing rod, and the reinforcing rod is also provided with long grooves.

2. The heat transfer film unwinding roller assembly mechanism according to claim 1, characterized in that: The unwinding roller is mounted on the unwinding roller frame for rotating unwinding, and the unwinding roller frame is fixedly connected to the left end of the frame.

3. The heat transfer film unwinding roller assembly mechanism according to claim 1, characterized in that: A guide roller is also installed on the left side of the frame at the lower left corner of the unwinding roller.

4. The heat transfer film unwinding roller assembly mechanism according to claim 1, characterized in that: Several rotating rollers are located below the unwinding roller and to the left of the heat transfer station.

5. The heat transfer film unwinding roller assembly mechanism according to claim 1, characterized in that: The frame has several internal threaded holes from left to right for screwing into the first bolts of the long grooves of the roller frame.

6. The heat transfer film unwinding roller assembly mechanism according to claim 1, characterized in that: The reinforcing link is also long and narrow, with a second bolt inserted between the long groove on it and the long groove of the roller frame. The second bolt is then screwed with a second nut for locking.

7. The heat transfer film unwinding roller assembly mechanism according to claim 1, characterized in that: The roller frame consists of two sections: an upper long rod and a lower short rod. A corresponding through hole is provided between the bottom end of the upper long rod and the top end of the lower short rod, and a third bolt is threaded through the through hole. A third nut is screwed onto the third bolt.

8. The heat transfer film unwinding roller assembly mechanism according to claim 7, characterized in that: The rotating roller is rotatably connected to the bottom end of the lower short rod.

9. The heat transfer film unwinding roller assembly mechanism according to claim 7, characterized in that: The long grooves of the roller frame are set on the upper long rod.

10. The heat transfer film unwinding roller assembly mechanism according to claim 1, characterized in that: The width of the groove in the roller frame is the same as that in the long groove of the reinforcing connecting rod.

Images