A shrink-fit device and labeling system for bottle labeling machines

Abstract

This invention discloses a shrink-fit device and system for a bottle labeling machine, relating to the field of packaging bottle production technology. It includes a shrink-fit assembly and a conveying assembly. The conveying assembly includes a plate chain for cyclically reciprocating to the shrink-fit assembly. The shrink-fit assembly includes a second frame located at the plate chain. Two sets of parallel steam pipes are arranged within the second frame, and these steam pipes are inclined along the bottle's travel direction. Each steam pipe has an outlet on its inner side, creating a channel between the two steam pipes that allows the label to gradually shrink from bottom to top. This invention, by using two sets of parallel steam pipes inclined along the bottle's travel direction, combined with the inner outlets, forms a bottom-up hot airflow channel, ensuring the label is heated evenly and shrinks gradually, effectively preventing label deformation or damage caused by localized overheating.

Description

Technical Field

[0001] This invention relates to the field of packaging bottle production technology, specifically to a shrink-shrink device and labeling system for bottle bodies. Background Technology

[0002] Existing labeling equipment is a type of packaging machinery used to apply shrink film labels to bottles or other containers. A typical labeling machine includes a labeling assembly, a shrink assembly, and a conveying assembly for transporting bottles from the labeling station to the shrink assembly. The working process is as follows: the conveying assembly transports the bottles to the labeling station. During this transport, sensors and other components detect the bottle's position. Then, the labeling assembly performs steps such as label feeding, positioning, cutting, and injection to accurately place the label on the bottle. Next, the conveying assembly transports the bottle from the labeling station to the shrink assembly, where the bottle is shrunk to ensure the label adheres tightly to the bottle surface, achieving both aesthetic appeal and anti-counterfeiting effects.

[0003] Generally, the shrink-fit components mentioned above are typically box-type designs. For example, patent document CN220810110U discloses a horizontal labeling machine with a heat-shrink section for tightly shrinking the label applied to the bottle onto the outer surface of the bottle. The heat-shrink section is a high-temperature heating chamber, and the conveying equipment can pass the tagged bottle through the high-temperature heating chamber. After being processed by the high-temperature heating chamber, the label shrinks due to heat and can tightly cover the outer surface of the bottle.

[0004] The aforementioned high-temperature heating chamber works by creating a high-temperature atmosphere inside, causing labeled bottles to shrink when they enter. However, this high-temperature atmosphere means that when a labeled bottle enters, the entire label is immersed in the atmosphere, causing simultaneous shrinkage of all parts of the label. This synchronized shrinkage may prevent the label's own stress from being released, resulting in excessive or insufficient shrinkage in certain areas, leading to poor shrinkage. Furthermore, maintaining this fully enclosed high-temperature atmosphere requires the heating chamber to be constantly at a high temperature, consuming significant energy and increasing production costs. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a shrinking device and a shrinking system for a bottle labeling machine, which transforms the conventional full-body heat shrinking into a bottom-up gradual heat shrinking, resulting in uniform label shrinkage. Moreover, this gradual heat shrinking method consumes less steam compared to the high-temperature atmosphere provided by the conventional wrapping method, thus saving production costs.

[0006] To address the above problems, the present invention provides the following technical solution:

[0007] A shrinking device for a bottle labeling machine includes a shrinking assembly and a conveying assembly for conveying bottles to the shrinking assembly. The shrinking assembly includes a second frame mounted on the frame of the conveying assembly. Two sets of parallel steam pipes are arranged within the second frame, and the steam pipes are inclined along the direction of bottle travel. Both steam pipes have air outlets on their inner sides, so that the area between the two steam pipes forms a travel channel for the label to gradually shrink from bottom to top.

[0008] As a further embodiment of the present invention: the conveying assembly includes a plate chain and a bottle holder; the bottle holder includes two sets of sub-molds with grooves that can switch between closed and open states, the two sub-molds being fixed to two chain plates of the plate chain respectively; the positioning key is provided on the sub-mold located at the leading edge of the conveying direction, and it protrudes from one side of the groove to form a guide rail for directional sliding of the through groove;

[0009] When the two molds are in the closed state, the two cavities enclose a storage cavity for inserting the bottle neck; when the two molds are in the open state, the mold located at the leading edge of the conveying direction is tilted, and the inverted bottle body is tilted in the same way by the side of the positioning key to achieve material dropping.

[0010] As a further aspect of the present invention, a limiting groove is also provided at the bottle holder. The limiting groove is adapted to the shape of the protrusion of the bottle mouth and is recessed at the top of the sub-mold to support and limit the protrusion.

[0011] As a further aspect of the present invention: the limiting groove is a split design, which is composed of a first groove and a second groove spliced ​​together, and the first groove and the second groove are respectively provided on two sub-molds.

[0012] As a further aspect of the present invention: the guide rail is arranged along the length direction of the positioning key, and the end of the guide rail near the opening of the storage cavity has a sharp chamfer design.

[0013] As a further aspect of the present invention: the joint ends of the two sub-molds are both recessed and provided with mounting grooves, the sum of the groove depths of the two mounting grooves being equal to the thickness of the positioning key, so that when the positioning key is installed on the corresponding sub-mold, the positioning key is located in the center position between the two sub-molds.

[0014] As a further aspect of the present invention: a support rod is provided at the end of the shrinking component. The support rod is fixed on the frame and a horizontally extending stop bar is arranged on the support rod. The stop bar is located within the movement path of the bottle. When the two molds are in the open state and the bottle is tilted by the guide rail, the stop bar can block the bottle body so that the bottle mouth is disengaged from the guide rail.

[0015] As a further embodiment of the present invention: the positioning key is detachably mounted on the mounting groove of the sub-mold.

[0016] The present invention also proposes a labeling system, which, in addition to the above-mentioned shrinking device for labeling bottles, further includes a labeling component for labeling bottles, and the labeling component is located upstream of the shrinking component.

[0017] As a further aspect of the present invention: the label assembly includes a first frame located at the plate chain, a guide post arranged vertically within the first frame, a feeder for feeding labels to the guide post at the top of the first frame, and two sets of drive wheels within the first frame, with the two drive wheels located on both sides of the guide post and in contact with the label outside the guide post, so that when the bottle moves to below the guide post, the two drive wheels can rotate synchronously to apply a downward movement trend to the label.

[0018] As a further aspect of the present invention, the system further includes a pressing component disposed between the labeling component and the shrinking component. The pressing component includes a third frame disposed at the plate chain. The third frame is provided with a pressing plate that can reciprocate within the range of the bottle's travel path, for pressing down on the label protruding from the bottle.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By combining a reciprocating plate chain conveyor system with inclined steam pipes, continuous automated conveying and efficient heat shrinking of bottles can be achieved. Two sets of parallel steam pipes are inclined along the direction of bottle travel, forming an upward hot airflow channel with the inner air outlet. This ensures that the label is heated evenly and gradually shrinks, effectively preventing label deformation or damage caused by localized overheating. Furthermore, this pipe layout creates a steam atmosphere that consumes less steam compared to the enclosed high-temperature atmosphere in existing technologies, saving production costs.

[0021] 2. By adopting a modular bottle holder design, the bottle holder consists of two sets of openable and closable sub-molds, enabling automatic clamping and release of the bottle. In the closed mode, the two cavities close together to form a storage cavity. Combined with the positioning key and limiting groove, this ensures precise positioning of the bottle, preventing offset or tipping during transport. Furthermore, this precise positioning in the closed mode also securely limits the bottle as it passes the shrinking assembly, preventing its position from being disturbed by the steam environment. In the open mode, the leading sub-mold automatically tilts, allowing the bottle to slide off the side against the positioning key, achieving automated unloading, reducing manual intervention, and improving production efficiency.

[0022] 3. The positioning key features a protruding guide rail design on its side, arranged along the length to form a stable guide track. This guide rail structure enhances the sliding stability of the bottle's passageway, reduces bottle swaying during transport, improves positioning accuracy, reduces frictional loss, and extends the equipment's service life. Furthermore, a sharp chamfer is used at the end of the guide rail near the loading cavity opening, making it easier for the bottle to slide into the guide rail and preventing jamming caused by edge burrs or misalignment. This structure optimizes the smoothness of bottle assembly, increases production cycle time, and reduces the failure rate.

[0023] 4. By setting the guide rail on the sub-mold located at the leading edge, when the mold is open, the bottle mouth only relies on the insertion and engagement relationship between its through groove and the guide rail to present the same tilt state as the leading sub-mold. When the bottle body is blocked by the stop bar, the bottle body will rotate around the bottle mouth as the center. During this rotation, since the bottle mouth is placed on the sub-mold only by the insertion and engagement relationship between its through groove and the guide rail, and is not limited or blocked by other positions of the sub-mold, the through groove on the bottle mouth can slide directly off the guide rail and disengage, thus achieving rapid material dropping.

[0024] 5. The limiting groove adopts a split structure, consisting of a first groove and a second groove, which are respectively located on two sub-molds. This design reduces the processing difficulty, facilitates maintenance and replacement, and improves adaptability. The groove structure can be adjusted according to the shape of different bottle neck protrusions, enhancing the versatility of the equipment.

[0025] 6. An installation groove is provided at the joint end of the two molds, with the sum of the groove depths equal to the thickness of the positioning key, ensuring that the positioning key is centered between the two molds after installation. This structure improves the installation accuracy of the positioning key, prevents skewing, enhances overall rigidity, reduces the impact of vibration on bottle positioning, and further improves conveying stability.

[0026] 7. A support rod and a stop bar are installed at the end of the shrink assembly. When the sub-mold switches to the open state, the stop bar applies a blocking force to the tilted bottle body, causing the bottle mouth to smoothly disengage from the guide rail, achieving reliable bottle removal. This structure improves the automation level of material unloading, avoids jamming, reduces manual intervention, and enhances the continuous operation capability of the production line. Furthermore, by setting this purely mechanical mechanism of support rod and stop bar, the complex structure of pneumatic or electric solutions is avoided, resulting in higher reliability.

[0027] 8. Integrating the labeling and shrink-wrapping components into the same system achieves seamless connection between the labeling and heat-shrinking processes. This design reduces intermediate transfer steps, improves production efficiency, and offers strong system compatibility, adapting to different bottle sizes and labels to meet diverse production needs.

[0028] 9. A pressure assembly is installed between the labeling and shrink-wrapping processes. A reciprocating pressure plate presses down on the protruding label, ensuring a tight fit against the bottle and improving the quality of subsequent heat shrinking. The pressure plate stroke is adjustable to accommodate labels of different heights, enhancing the equipment's flexibility and adaptability, and reducing the risk of label misalignment or wrinkling. Attached Figure Description

[0029] The invention will now be further described with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the novel packaging bottle structure of the present invention. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the novel packaging bottle structure of the present invention. Figure 2 ;

[0032] Figure 3 This is a schematic diagram of the labeling system structure of the present invention;

[0033] Figure 4 yes Figure 3 Local structure diagram Figure 1 ;

[0034] Figure 5 This is a side view schematic diagram of the two sets of steam pipe structures of the present invention;

[0035] Figure 6 This is a schematic diagram of the two molds in the mold-closing state of the present invention;

[0036] Figure 7 This is a schematic diagram of the two-module split-state structure of the present invention;

[0037] Figure 8 yes Figure 7 A schematic diagram of the exploded structure;

[0038] Figure 9 This is a top view of the two molds of the present invention in the mold-closed state;

[0039] Figure 10 This is a schematic diagram of the three-dimensional structure of the plate chain of the present invention;

[0040] Figure 11 This is a three-dimensional structural diagram of two molded plates of the present invention.

[0041] Figure 12 yes Figure 3 Local structure diagram Figure 2 ;

[0042] Figure 13 yes Figure 3 Local structure diagram Figure 3 ;

[0043] Figure 14 yes Figure 3 Local structure diagram Figure 4 ;

[0044] Figure 15 This is a schematic diagram showing the structure where the label is not fully attached to the bottle.

[0045] In the picture:

[0046] 101. Packaging bottle body; 102. External thread; 103. Through groove; 104. Annular flange; 105. Protrusion;

[0047] 1. Labeling assembly; 2. Shrink assembly; 3. Conveying assembly; 301. Plate chain; 3011. Chain plate; 4. Bottle holder; 5. Positioning key; 6. Limiting groove; 7. Guide rail; 8. Mounting cavity; 9. Support rod; 10. Stop bar; 11. First frame; 12. Guide column; 13. Feeding component; 14. Drive wheel; 15. Second frame; 16. Steam pipe; 1601. Air outlet; 17. Pressing assembly; 18. Third frame; 19. Pressing plate; 20. Drive source; 21. Transfer slide; 22. Bolt; 23. Nut; a. Bottle body. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Example 1:

[0050] like Figures 3-5 and Figures 13-15 As shown, a labeling system includes a labeling component 1 for labeling bottle a, a shrinking component 2 for heat shrinking the labeled bottle a, and a conveying component 3 for conveying and associating the two. The conveying component 3 is used to convey the bottle a to be labeled to the labeling station of the labeling component 1. After the labeling component 1 completes the labeling of the bottle a, the conveying component 3 then conveys the bottle a to the shrinking station of the shrinking component 2. That is, the upstream section of the conveying component 3 is located at the labeling component 1, and the downstream section is located at the shrinking component 2.

[0051] Regarding the aforementioned labeling component 1, the labeling component 1 can be a conventional component from the prior art, or it can be a labeling component 1 proposed in this application. This labeling component 1 includes a first frame 11 located upstream of the conveying component 3. A feeding element 13 is provided on the top outer wall of the first frame 11, and a guide post 12 is provided on the top inner wall of the first frame 11. The feeding element 13 supplies labels to the guide post 12, and the supplied labels are fitted onto the outside of the guide post 12. A labeling station is formed directly below the guide post 12. Two sets of opposing drive wheels 14 are also provided inside the first frame 11. Both drive wheels 14 can be driven by corresponding motors. The two drive wheels 14 are located on both sides of the guide post 12 and are in contact with the labels outside the guide post 12. When bottle a is conveyed to the labeling station via the conveying component 3, both drive wheels 14 rotate synchronously to apply a downward movement trend to the label, allowing the label to be accurately fitted onto the bottle body of bottle a and completely cover the bottle body. Figure 13 As shown, the two drive wheels 14 rotate in the following directions: the drive wheel 14 on the left rotates clockwise, and the drive wheel 14 on the right rotates counterclockwise.

[0052] It should be noted that during this labeling process, the conveying component 3 can operate without stopping. When it moves the bottle a to the labeling station, the two drive wheels 14 quickly apply a downward force to the label, causing the label to be applied to the bottle a in a very short time. Meanwhile, the feeding component 13 is a conventional component in the prior art and will not be described in detail here.

[0053] Regarding the aforementioned configuration of the shrinkage assembly 2, the shrinkage assembly 2 can utilize conventional components from the prior art, or it can employ the shrinkage assembly 2 proposed in this application. This shrinkage assembly 2 includes a second frame 15 located downstream of the conveying assembly 3. Two sets of parallel steam pipes 16 are arranged within the second frame 15. Each of the two steam pipes 16 has an outlet 1601 on its inner side, through which steam can be ejected. Figure 4 As shown, the air outlet 1601 is located on the side of the steam pipe 16 facing the paper. Figure 5 From the side view shown, the area between the two steam pipes (16) forms a passageway, within which a steam atmosphere is created. Furthermore... Figure 4 As shown, the walking channel has an inclined layout from left to right. Therefore, when bottle a is conveyed from left to right, the walking channel with the above layout can perform gradual heat shrinking treatment on the label on the bottle from bottom to top along the direction of travel.

[0054] This layout of the walking channel is designed to match the direction of travel of bottle a. By gradually shrinking the label on the bottle from bottom to top, it ensures that the label can fit snugly against the bottle, achieving a comfortable viewing experience and perfect anti-counterfeiting effect.

[0055] Example 2:

[0056] like Figure 3 and Figures 14-15 As shown, based on the above-mentioned labeling component 1, shrinking component 2, and conveying component 3, during the labeling process, there may be instances where the label cannot completely cover the bottle body, for example, [the following occurs]. Figure 15 In the situation shown, the lower part of the bottle cannot be labeled. Therefore, this application provides a pressing component 17 on the conveying component 3 downstream of the labeling component 1. The pressing component 17 will be described below:

[0057] The pressing assembly 17 is used to press the material into place. Figure 15 The label in the indicated state is pressed down so that it completely covers the bottle body, facilitating subsequent shrinkage processing. Specifically, the pressing assembly 17 includes a third frame 18 located at the conveying assembly 3. A pressure plate 19 is mounted on the third frame 18. The pressure plate 19 can reciprocate vertically. When the pressure plate 19 is in the lower position, it is in contact with the top of the bottle body. In this design, when the label on the bottle body is protruding after being processed by the labeling assembly 1, once the bottle body a moves below the pressure plate 19, the downward movement of the pressure plate 19 pushes the label downward. Due to the movement characteristic that the pressure plate 19 is only in contact with the top of the bottle body when it is in the lower position, the label is pushed to completely cover the bottle body, and the pressure plate 19 will not cause pressure damage to the top of the bottle body.

[0058] To achieve the reciprocating motion of the pressure plate 19, a drive source 20 can be provided on the third frame 18. The drive source 20 can be a conventional cylinder, hydraulic cylinder, electric push rod, etc., or a motor and a crank mechanism composed of connecting rods, etc.

[0059] Example 3:

[0060] To meet different production needs, manufacturers typically modify the standard bottle body (a) to create a new bottle structure. Figure 1 and Figure 2 This paper shows a packaging bottle structure with corresponding structural improvements. Figure 1 and Figure 2These figures represent two different perspectives. In the diagram, 101 represents the packaging bottle body, 102 represents the external thread protruding from the bottle mouth, 103 represents the through groove recessed on the external thread, and this through groove is arranged along the axis of the bottle mouth, 104 represents the annular flange protruding from the bottle mouth, and 105 represents the protrusion on the annular flange extending radially along the bottle mouth. Based on the proposed bottle body a, simply setting a base on the conveying assembly 3 makes it difficult to limit and fix the irregularly shaped bottle mouth of this new structure bottle body a. This can easily cause the bottle body a to shake or shift position during conveying, resulting in the labeling and shrinking processes failing to perform properly. Therefore, this embodiment improves the design of the conveying assembly 3.

[0061] like Figures 6-11 As shown, the conveying assembly 3 includes a plate chain 301 and a bottle holder 4. The plate chain 301 can perform cyclic reciprocating motion, and a portion of the plate chain 301 can be composed of... Figure 10 As shown, the bottle holder 4 consists of two sets of sub-molds 401 with grooves, and the two sub-molds 401 are symmetrically arranged on the two chain plates 3011 of the plate chain 301. Figure 11 The illustration shows two sets of molds 401 mounted on a plate chain 301. Here, the two sets of molds 401 are respectively mounted on two chain plates 3011 separated by a chain plate 3011. Of course, the specific mounting configuration can be adjusted according to actual conditions and is not subject to change. Figure 11 The installation is limited by the conditions shown.

[0062] Under normal conveying conditions, the two molds 401 are positioned on the plate chain 301. Figure 11 As shown, the two molds 401 are in a closed state, and the cavities of the two molds 401 together form a storage cavity for inserting the bottle neck. The opening of the storage cavity has a chamfered design. Figure 11 The direction of the middle arrow indicates the direction of travel of bottle a. When the two sub-molds 401 move to the end of the plate chain 301, the sub-mold 401 located at the forefront of the travel direction will first tilt. This state can be determined by... Figure 3 and Figure 12 To represent, Figure 12 In the two sub-molds 401 in the open mold state, the sub-mold 401 on the right can be represented as the sub-mold 401 located at the leading edge of the traveling direction. At this time, the two sub-molds 401 are in the open mold state, the shape of the placement cavity is broken, and the bottle mouth will move out from the bottle holder 4.

[0063] To ensure the bottle neck is stably restrained by the bottle holder 4 after being inserted into the storage cavity, this embodiment adds a positioning key 5 based on the through groove 103 on the bottle body a. The positioning key 5 is located on the sub-mold 401 at the leading edge position in the traveling direction. One side of the positioning key 5 is located within the groove of the sub-mold 401. When the two sub-molds 401 are in the closed state, the side of the positioning key 5 protrudes into the storage cavity. This state can be controlled by… Figure 9 To illustrate, the presence of this side allows the through groove 103 to be fitted and oriented to slide during the process of placing the bottle opening from top to bottom into the storage cavity. This side can restrict the position of the bottle opening in the storage cavity, so that the bottle body a always remains stable on the bottle holder 4.

[0064] Based on the presence of the positioning key 5 on its side, when both sub-molds 401 are in the open mold state, since the positioning key 5 is located on the sub-mold 401 at the leading edge of the traveling direction, when the sub-mold 401 is in a pre-tilted state, the bottle body a can be moved to the same tilted state by relying on the side of the positioning key 5. This tilted state can be determined by... Figure 12 To illustrate, when the sub-mold 401 is tilted to a sufficiently large angle, the through groove 103 at the bottle mouth will slide off the side of the positioning key 5 and move out of the sub-mold 401.

[0065] To prevent bottle a from tilting too much with the sub-mold 401, making collection difficult, this embodiment includes a support rod 9 at the end of the plate chain 301. A horizontally arranged stop bar 10 is mounted on the support rod 9, located within the movement path of bottle a. When the two sub-molds 401 are in... Figure 12 When the mold is open and the bottle a is tilted relative to the side of the positioning key 5, the stop bar 10 can block the bottle body of the bottle a, so that the bottle mouth of the bottle a is disengaged from the side of the positioning key 5, thus achieving material dropping. At the same time, based on this material dropping design with a relatively small tilt angle, this embodiment has sufficient space to set a transfer slide 21 at the end of the plate chain 301, which is used to receive the dropped bottle a.

[0066] Specifically, the positioning key 5 is a one-piece protruding design on the side of the cavity, which forms a guide rail 7 along the length of the positioning key 5. Meanwhile, to ensure smooth insertion of the bottle neck slot 103 from top to bottom, the end of the guide rail 7 near the opening of the storage cavity is designed with a sharp chamfer. Figure 6 As shown, the top of the guide rail 7 has a sharp chamfered design, which guides the insertion of the through slot 103.

[0067] Furthermore, based on the design of the protrusion 105 on the bottle body a, this embodiment can also open a limiting groove 6 at the top of the sub-mold 401. During the process of the bottle mouth being inserted into the storage cavity from top to bottom, in addition to using the side of the positioning key 5 to restrict the through groove 103 as mentioned above, the limiting groove 6 is also used to accommodate and limit the protrusion 105, so that the bottle mouth is restricted in multiple directions in the storage cavity, presenting a good stable state.

[0068] Preferably, the limiting groove 6 is positioned directly above the positioning key 5, forming a continuous positioning system that keeps the positioning of the bottle mouth protrusion 105 and the through groove 103 on the same vertical line. This optimized layout improves positioning accuracy, reduces the shaking of the bottle body a during transportation, and ensures process stability.

[0069] To facilitate proper material placement of the bottle body a on the sub-mold 401 in the open mold state, this embodiment features recessed mounting grooves 8 at the joint ends of both sub-molds 401. The sum of the depths of the two mounting grooves 8 is equal to the thickness of the positioning key 5, ensuring that the positioning key 5 is positioned centrally between the two sub-molds 401 when it is installed on the corresponding sub-mold 401. Therefore, in the open mold state, Figure 12 As shown, only half of the bottle opening is located in the cavity of the right sub-mold 401, which reduces the restriction of the sub-mold 401 on the bottle opening when the mold is open. This makes it easier for the bottle body to fall at a small tilt angle when the bottle body is blocked by the stop bar 10, as the slight shift of the center of gravity of the bottle body a can make it fall.

[0070] To further improve the material distribution of bottle body a, this embodiment is not limited to setting the limiting groove 6 as a single integral type, but rather sets it as a split type, with a first groove 601 and a second groove 602. The first groove 601 and the second groove 602 are respectively set on two sub-molds 401. Preferably, the first groove 601 is set on the sub-mold 401 located at the rear edge of the traveling direction, and the second groove 602 is set on the sub-mold 401 located at the front edge of the traveling direction. This design can be achieved by... Figure 7 To indicate. When in Figure 12 When the mold is open, only half of the bottle opening is located on the second slot 602 on the right side, which further reduces the restriction on the bottle opening in the mold-open state and facilitates subsequent material unloading.

[0071] Because different bottle bodies a have through grooves 103 of varying depths and widths at their openings, this embodiment sets the positioning key 5 on the sub-mold 401 as a detachable design. The detachable design can be any of the following methods: snap-fit, fastening, bonding, threaded connection, etc. Figure 8 As shown, taking a threaded connection as an example, the locating key 5 is installed at the corresponding position of the sub-mold 401 through the cooperation of bolt 22 and nut 23.

[0072] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A shrink-shrink device for a bottle labeling machine, characterized in that, The device includes a shrink assembly (2) and a conveying assembly (3) for conveying a bottle (a) to the shrink assembly (2); the shrink assembly (2) includes a second frame (15) on the frame of the conveying assembly (3), and two sets of parallel steam pipes (16) are provided in the second frame (15), and the steam pipes (16) are inclined along the direction of travel of the bottle (a). The inner side of the two steam pipes (16) is provided with an air outlet (1601) so that the area between the two steam pipes (16) forms a travel channel for the label to be gradually heat-shrinked from bottom to top. The conveying assembly (3) includes a plate chain (301) and a bottle holder (4); the bottle holder (4) includes two sets of sub-molds (401) with cavities that can switch between closed and open modes, and the two sub-molds (401) are respectively fixed on the two chain plates (3011) of the plate chain (301); the positioning key (5) is set on the sub-mold (401) located at the leading edge of the conveying direction, and it protrudes from one side of the cavity to form a guide rail (7) for the directional sliding of the through groove (103) on the bottle (a). When the two sub-molds (401) are in the closed state, the two cavities enclose a storage cavity for inserting the bottle mouth; when the two sub-molds (401) are in the open state, the sub-mold (401) located at the leading edge of the conveying direction is in an inclined state, and the inverted bottle (a) is in the same inclined state by relying on the side of the positioning key (5) to achieve material dropping.

2. The shrink-wrap device for a bottle labeling machine according to claim 1, characterized in that, A limiting groove (6) is also provided at the bottle holder (4). The limiting groove (6) is adapted to the shape of the bottle mouth protrusion (105) and recessed at the top of the sub-mold (401) to support and limit the protrusion (105).

3. The shrinking device for a bottle labeling machine according to claim 2, characterized in that, The limiting groove (6) is a split design, which is composed of a first groove (601) and a second groove (602), and the first groove (601) and the second groove (602) are respectively located on two sub-molds (401).

4. A shrink-fit device for a bottle labeling machine according to any one of claims 1-3, characterized in that, The guide rail (7) is arranged along the length of the positioning key (5), and the end of the guide rail (7) near the opening of the storage cavity has a sharp chamfer design.

5. A shrink-fit device for a bottle labeling machine according to any one of claims 1-3, characterized in that, Both sub-molds (401) have recessed mounting grooves (8) at their joint ends. The sum of the groove depths of the two mounting grooves (8) is equal to the thickness of the positioning key (5), so that when the positioning key (5) is installed on the corresponding sub-mold (401), the positioning key (5) is in the center between the two sub-molds (401).

6. A shrink-fit device for a bottle labeling machine according to claim 4, characterized in that, The shrinking component (2) is provided with a support rod (9) at its end. The support rod (9) is fixed on the frame and a horizontally extending stop (10) is arranged on the support rod (9). The stop (10) is located within the movement path of the bottle (a). When the two molds (401) are in the open state and the bottle (a) is tilted by the guide rail (7), the stop (10) can block the bottle body of the bottle (a) so that the bottle mouth of the bottle (a) is disengaged from the guide rail (7).

7. A labeling system for a shrink-fit device of a labeling machine for bottles, as described in any one of claims 1-6, characterized in that, It also includes a labeling assembly (1) for labeling the bottle (a), and the labeling assembly (1) is located upstream of the shrink assembly (2).

8. The labeling system according to claim 7, characterized in that, The label assembly (1) includes a first frame (11) located at the plate chain (301). A guide post (12) arranged vertically is provided in the first frame (11). A feeder (13) for feeding labels to the guide post (12) is provided at the top of the first frame (11). Two sets of drive wheels (14) are provided in the first frame (11). The two drive wheels (14) are located on both sides of the guide post (12) and are in contact with the label outside the guide post (12). When the bottle (a) moves to below the guide post (12), the two drive wheels (14) can rotate synchronously to apply a downward movement trend to the label.

9. The labeling system according to claim 8, characterized in that, The system also includes a pressing assembly (17) located between the label assembly (1) and the shrink assembly (2). The pressing assembly (17) includes a third frame (18) located at the plate chain (301). The third frame (18) is provided with a pressing plate (19) that can reciprocate to the travel path of the bottle body (a) for pressing down the label protruding from the bottle body (a).

Images