Preheating structure

Abstract

The present invention provides a preheating structure, which belongs to the field of packaging technology, and includes: a first preheating block, which is fixed to a frame; a second preheating block, which is movably connected to the frame and has a preheating state parallel to the first preheating block, in which a preheating gap is formed between the two opposite heating surfaces of the second preheating block and the first preheating block; the second preheating block also has a maintenance state away from the first preheating block, in which a maintenance space is formed between the second preheating block and the first preheating block for facilitating cleaning of the heating surface; a heating element is provided on the first preheating block and / or the second preheating block. The preheating structure of the present invention adjusts the space distance formed between the second preheating block and the first preheating block by rotating the second preheating block, so that there is enough maintenance space to clean the heating surface, avoiding difficulty in cleaning due to insufficient space; and in the low-speed preheating state, the preheating gap can be opened at a certain angle to avoid melting and sticking of the material.

Description

Technical Field

[0001] The invention relates to the technical field of packaging, and in particular to a preheating structure. Background Art

[0002] In the packaging industry, plastic packaging bags are generally sealed by heat sealing. In order to increase the strength of the seal, the bag opening is first preheated, and then the preheated area of ​​the bag opening is rolled and sealed horizontally.

[0003] The preheating structure used in the prior art is a fixed structure, that is, a pair of preheating blocks are fixed to corresponding installation positions of the equipment. In order to achieve the expected preheating effect, the preheating gap is generally small.

[0004] When cleaning or maintaining the above-mentioned preheating structure, it is difficult to clean the impurities such as overflow glue and dust on the heating surface of the preheating mechanism due to the small preheating gap. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the preheating structure in the prior art that it is difficult to clean the preheating surface due to the small preheating gap, thereby providing a preheating structure that is easy to maintain.

[0006] In order to solve the above technical problems, the preheating structure provided by the present invention comprises:

[0007] A first preheating block is fixedly connected to the frame;

[0008] A second preheating block is movably connected to the frame and has a preheating state parallel to the first preheating block, in which a preheating gap is formed between two opposite heating surfaces of the second preheating block and the first preheating block;

[0009] The second preheating block also has a maintenance state away from the first preheating block, in which a maintenance space is formed between the second preheating block and the first preheating block for facilitating cleaning of the heating surface;

[0010] The first preheating block and / or the second preheating block is provided with a heating element.

[0011] As a preferred solution, the preheating structure further includes:

[0012] There is at least one preheating gap adjustment rod, which is arranged on the first preheating block and / or the second preheating block and has an extended end that can be adjusted to extend between the second preheating block and the first preheating block.

[0013] As a preferred solution, the preheating gap adjustment rod is connected to the first preheating block and / or the second preheating block via threads.

[0014] As a preferred solution, the preheating structure further includes:

[0015] The preheating block locking structure is at least partially connected to the frame and is suitable for locking the second preheating block by connecting the second preheating block.

[0016] As a preferred solution, the preheating block locking structure includes:

[0017] A locking seat connected to the frame;

[0018] The plug-in assembly comprises a first part arranged on the locking seat and a second part arranged on the second preheating block; when the second preheating block is located in the maintenance state, the first part and the second part of the plug-in assembly are suitable for being connected by plugging.

[0019] As a preferred solution, the preheating structure further includes:

[0020] The driving assembly has a driving end that can move linearly, and the driving end is connected to the second preheating block.

[0021] As a preferred solution, the preheating structure further includes:

[0022] The towing assembly comprises a first connecting rod, one end of which is hingedly connected to the driving end of the driving assembly, and the other end of the first connecting rod is rotatably connected to the second preheating block; the second preheating block is rotatably connected to the frame.

[0023] As a preferred solution, the drag component further includes:

[0024] The second connecting rod has a bending structure, one end of which is hinged to the first connecting rod, and the other end of which is fixedly connected to the second preheating block.

[0025] As a preferred solution, the first preheating block and the second preheating block are connected via a hinge;

[0026] An adjustment seat is connected between the first preheating block and the frame, and the adjustment seat has a fine-tuning structure for adjusting the parallelism between the preheating gap and the material flow line.

[0027] As a preferred solution, the adjustment seat includes:

[0028] A vertical connecting plate, having a vertical surface in contact with the frame, and having long connecting holes and circular connecting holes arranged in sequence along the direction of the material flow line on the vertical connecting plate;

[0029] The fine-tuning structure is installed on the vertical connecting plate and has a sliding block that can be adjusted up and down and is connected by a screw structure, and the sliding block is connected to the first preheating block.

[0030] The technical solution of the present invention has the following advantages:

[0031] 1. The preheating structure provided by the present invention comprises a first preheating block fixedly connected to a frame, and a second preheating block movably connected to the frame; in the preheating state, the second preheating block is parallel to the first preheating block, and the heating surfaces facing each other form a preheating gap; in the maintenance state, the second preheating block is away from the first preheating block, and a maintenance space is formed between the second preheating block and the first preheating block for facilitating cleaning of the heating surface; wherein a heating element is provided on the first preheating block and / or the second preheating block; the space formed by the second preheating block and the first preheating block can be rotated along the frame by the second preheating block, so there is enough space to clean the heating surface of the preheating block, thereby avoiding the defect that it is difficult to clean the preheating surface due to the small preheating gap.

[0032] 2. The preheating structure provided by the present invention also includes a preheating gap adjustment rod, which has at least one, is arranged on the first preheating block and / or the second preheating block, and has an extended end that can be adjusted to extend between the second preheating block and the first preheating block; by adjusting the preheating gap adjustment rod, the distance between the heating surfaces of the first preheating block and the second preheating block can be adjusted, so that the material can achieve the best preheating effect in the preheating gap.

[0033] 3. In the preheating structure provided by the present invention, the preheating gap adjustment rod is connected to the first preheating block and / or the second preheating block by a thread; the rotational motion of the preheating gap adjustment rod is converted into linear motion, so that the adjustment value of the distance between the first preheating block and the second preheating block is more consistent and accurate, and the threaded connection adjustment has the advantage of self-locking.

[0034] 4. The preheating structure provided by the present invention also includes a preheating block locking structure, which is at least partially connected to the frame and is suitable for locking the second preheating block by connecting the second preheating block; the second preheating block is locked by the preheating block locking structure, and a fixed distance can be maintained between the first preheating block and the second preheating block, instead of manually lifting the second preheating block, avoiding some unpredictable consequences such as manual fatigue caused by long maintenance time and sudden falling of the second preheating block due to improper operation.

[0035] 5. The preheating structure provided by the present invention, the preheating block locking structure includes: a locking seat connected to the frame and a plug-in assembly; the plug-in assembly includes a first part arranged on the locking seat and a second part arranged on the second preheating block; when the second preheating block is in the maintenance state, the first part and the second part of the plug-in assembly are suitable for being connected by plugging; the plug-in assembly fixes the second preheating block on the locking seat, and reserves sufficient maintenance space for the protection of the preheating block. The plug-in assembly is convenient and quick to cooperate and lock, which is conducive to improving the efficiency of the entire preheating process.

[0036] 6. The preheating structure provided by the present invention also includes: a driving component, having a driving end that can move linearly, and the driving end is connected to the second preheating block; the driving component controls the movement of the second preheating block on the frame, and can drive the second preheating block to open a corresponding angle according to the running speed of the material to be preheated, so as to prevent the temperature from being too high or too low, causing the material to melt here, excessive glue overflow or insufficient preheating intensity, affecting the subsequent banner sealing effect or the appearance of the packaging bag, and making the preheating process more automated, which is conducive to improving work efficiency.

[0037] 7. The preheating structure provided by the present invention also includes: a towing assembly, having a first connecting rod, one end of the first connecting rod is hingedly connected to the driving end of the driving assembly, and the other end of the first connecting rod is rotatably connected to the second preheating block; the second preheating block is rotatably connected to the frame; the driving end and the second preheating block are connected by the first connecting rod, which is conducive to converting the linear motion of the driving assembly into rotation of the second preheating block around the frame.

[0038] 8. The preheating structure provided by the present invention, the towing assembly also includes: a second connecting rod, which has a bending structure, one end of which is hinged to the first connecting rod, and the other end is fixedly connected to the second preheating block; the setting of the second connecting rod facilitates the connection and installation of the second preheating block and the first connecting rod.

[0039] 9. In the preheating structure provided by the present invention, the first preheating block and the second preheating block are connected by a hinge; an adjustment seat is connected between the first preheating block and the frame, and the adjustment seat has a fine-tuning structure for adjusting the parallelism between the preheating gap and the material flow line; the first preheating block and the second preheating block are directly hinged to make their matching connection tighter, and the setting of the adjustment seat makes the installation and debugging of the preheating structure more precise, which is conducive to achieving a better preheating effect.

[0040] 10. The preheating structure provided by the present invention, the adjustment seat includes: a vertical connecting plate, having a vertical surface contacting and connected with the frame, and the vertical connecting plate is provided with long connecting holes and circular connecting holes in sequence along the direction of the material assembly line; a fine-tuning structure, installed on the vertical connecting plate, having a slider that can be adjusted up and down through a screw structure, and the slider is connected to the first preheating block; the front and rear positions of the adjustment seat on the assembly line are adjusted by cooperating with the long connecting holes and the circular connecting holes, and the up and down positions of the slider connected to the first preheating block are adjusted by the fine-tuning structure, and the position of the preheating block can be adjusted by only adjusting the position of the adjustment seat. Such a structure makes the installation and debugging of the preheating block more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of the structure of the preheating structure provided by the present invention;

[0043] Figure 2 for Figure 1 A left side view of the preheating structure shown;

[0044] Figure 3 for Figure 1 A front view of the preheating structure shown;

[0045] Figure 4 It is a structural schematic diagram of the adjustment seat;

[0046] Figure 5 It is a schematic diagram of the structure of the preheating structure when the second preheating block is fully lifted;

[0047] Figure 6 It is a schematic diagram of the structure of the preheating structure when the second preheating block is partially lifted.

[0048] Description of reference numerals:

[0049] 1. First preheating block; 2. Second preheating block; 3. Heating element; 4. Thermocouple; 5. Articulated seat; 6. Side pressure plate; 7. Preheating gap adjustment rod; 8. Driving assembly; 9. First connecting rod; 10. Second connecting rod; 11. Plug-in block; 12. Plug-in slot; 13. Mounting seat; 14. Handle; 15. Detection plate; 16. Sensor bracket; 17. Sensor; 18. First vertical connecting plate; 19. Slider; 20. Second vertical connecting plate; 21. Horizontal connecting plate; 22. Hexagon socket long screw; 23. Cover plate. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] The preheating structure provided in this embodiment includes: a first preheating block 1 , a second preheating block 2 , and a heating element 3 .

[0055] like Figure 1 , Figure 2 As shown, a heating element 3 is provided inside the first preheating block 1 and the second preheating block 2, and the heating element 3 is fastened inside the two by a set screw. Here, the heating element 3 is a heating rod; a protruding heating surface is provided on the first preheating block 1 and the second preheating block 2 near the side of the heating element 3; a thermocouple 4 is provided above the left end of the first preheating block 1 and the second preheating block 2, and the thermocouple 4 is used to measure the temperature of the heating element 3; the first preheating block 1 and the second preheating block 2 are connected by two sets of hinge seats 5, so that the two The heating surfaces are parallel and close to form a preheating gap, wherein the two groups of hinged seats 5 are symmetrically arranged on the upper surfaces of the first preheating block 1 and the second preheating block 2; the side of the first preheating block 1 away from the second preheating block 2 is fixedly connected to the slider 19 on the adjustment seat, and the adjustment seat is fixedly connected to the frame, so that the second preheating block 2 can rotate around the axis of the hinged seat 5 in the direction away from the first preheating block 1, so that there is enough maintenance space between the first preheating block 1 to clean up the overflow of glue, dust and other impurities on the heating surface in time.

[0056] like Figure 1 , Figure 2As shown, two preheating gap adjustment rods 7 are symmetrically connected to the two ends of the second preheating block 2 away from the heating surface. The preheating gap adjustment rods 7 are connected to the second preheating block 2 through threads and can be adjusted to extend to the heating surface of the first preheating block 1. The distance between the heating surface of the second preheating block 2 and the heating surface of the first preheating block 1 is controlled by adjusting the extension length of the preheating gap adjustment rods 7.

[0057] like Figure 1 , Figure 2 As shown, the left end of the second preheating block 2 on the side away from the heating surface is connected to one end of the second connecting rod 10, the other end of the second connecting rod 10 is hinged to one end of the first connecting rod 9, and the other end of the first connecting rod 9 is hinged to the driving end of the driving component 8, where the driving component 8 is a cylinder, and the cylinder is suitable for being connected to the frame through a fixed bracket; the first connecting rod 9 is driven by the cylinder to link the second connecting rod 10 to move in the direction away from the first preheating block 1, so that the heating surfaces of the first preheating block 1 and the second preheating block 2 are separated.

[0058] like Figure 1 , Figure 3 As shown, a plug-in block 11 is installed in the middle of the side away from the heating surface of the second preheating block 2, and a plug-in slot 12 is provided in the left-right symmetrical plane of the plug-in block 11, and the plug-in slot 12 is suitable for being connected to the frame through a mounting seat 13; when the heating surface is maintained or the material passes into the preheating gap, the second preheating block 2 needs to be lifted in advance so that the plug-in block 11 and the plug-in slot 12 are matched and locked; wherein, a long hole is provided on the mounting seat 13 for adjusting the position of the mounting seat 13 on the frame so that the plug-in block 11 and the plug-in slot 12 are better matched and locked; a handle 14 is provided on the side of the second preheating block 2 away from the heating surface, and the handle 14 assists in locking the second preheating block 2 to the plug-in slot 12. A detection plate 15 is provided at the right end of the upper surface of the second preheating block 2, which cooperates with a sensor 17 fixed to the frame through a sensor bracket 16. Here, the sensor 17 adopts a proximity sensor; two parallel long holes are provided on the sensor bracket 16, and the long holes are used to adjust the position of the sensor 17 on the frame so that it can better cooperate with the detection plate 15 for detection; when the second preheating block 2 is in a raised state, the detection plate 15 rotates and approaches the sensor 17, and the sensor 17 sends a detection signal to the controller, and the controller issues a warning prompt, so that the equipment cannot be started, thereby avoiding the phenomenon of poor preheating effect caused by the second preheating block 2 not being lowered.

[0059] like Figure 2 , Figure 4As shown, the adjustment seat is used to install the preheating block, including a vertical connecting plate and a fine-tuning structure; the fine-tuning structure includes a slider 19, a screw, and an adjustment frame; the vertical connecting plate includes a first vertical connecting plate 18 and a second vertical connecting plate 20, and a U-shaped structure is formed through a horizontal connecting plate 21, wherein the second vertical connecting plate 20 serves as an adjustment frame of the fine-tuning structure, and the first vertical connecting plate 18 is fixedly connected to the frame; both ends of the vertical surface of the first vertical connecting plate 18 are provided with a long hole and a circular hole, the bisector of the long hole in the length direction is parallel to the horizontal connecting plate 21, and the center of the circular hole is located on the extension line of the bisector, and the adjustment seat is adjusted forward and backward in the direction of the material flow line through the cooperation of the long hole and the circular hole, that is, the preheating structure can be adjusted forward and backward along the direction of the material flow line. The second vertical connecting plate 20 serves as an adjustment frame of the fine-tuning mechanism, and has protruding ends extending from both sides, and through holes are symmetrically provided on the protruding ends on both sides. The lead screw passes through the through holes and is connected to the slider 19. Here, the lead screw adopts a long hexagon socket screw 22, and the lower surface of the nut of the long hexagon socket screw 22 is tightly matched with the upper surface of the protruding end; the top surface of the second vertical connecting plate 20 is connected to a cover plate 23, and the lower surface of the cover plate 23 is tightly matched with the upper surface of the nut, which is used to limit the movement of the long hexagon socket screw 22 in the vertical direction. 2 is rotated to achieve fine adjustment of the sliding up and down; through holes are opened on both sides of the cover plate 23, and the center of the through hole is on the extension line of the axis of the long hexagon socket screw 22, and the long hexagon socket screw 22 can be twisted and adjusted through the through hole; in addition, the end of the slider 19 away from the first preheating block 1 is connected to a side pressure plate 6; the setting of the adjustment seat makes the installation and debugging of the first preheating block 1 and the second preheating block 2 in the material flow line direction and the vertical direction convenient and convenient, and can better cooperate with the horizontal sealing roller equipment arranged behind it to achieve a stronger preheating horizontal sealing effect.

[0060] Directions:

[0061] During the installation process: the long strip hole and the circular hole on the adjustment seat are used in conjunction with each other to realize the front and rear position of the preheating structure on the material flow line; the long hexagon socket screw 22 arranged on the adjustment seat is rotated with an hexagon socket wrench to adjust the position of the slider 19 in the vertical direction, thereby realizing the adjustment of the preheating structure in the vertical direction; the position adjustment of the preheating structure is used to cooperate with the horizontal sealing roller pressing equipment arranged behind it to carry out the subsequent horizontal sealing process.

[0062] During the preheating process: after the equipment is turned on, the heating system of the preheating structure is first turned on, and the first preheating block 1 and the second preheating block 2 are heated to a set stable state; then, the control driving component 8 drives the first connecting rod 9 to lift the second preheating block 2, and the handle 14 assists the second preheating block 2 to be locked at the insertion slot 12, and the material is passed into the preheating gap, such as Figure 5As shown; after the penetration is completed, the second preheating block 2 is put down and the preheating action begins; the material starts to run at a low speed to avoid adhesion or damage of the material during low-speed operation, and the driving component 8 drives the first connecting rod 9 to pull up the second preheating block 2 to increase the preheating gap, such as Figure 6 Then the material starts to run at high speed, and the drive assembly 8 is in an extended state, so that the first preheating block 1 is parallel to the second preheating block 2 and the preheating gap is reduced.

[0063] In the maintenance state: first turn off the equipment, then lift the second preheating block 2 to the insertion slot 12 and lock it, so that there is enough maintenance space to clean the heating surface.

[0064] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. Preheating structure, characterized in that, include: A first preheating block (1) is fixedly connected to the frame; A second preheating block (2) is movably connected to the frame and has a preheating state parallel to the first preheating block (1), wherein in the preheating state, a preheating gap is formed between two opposing heating surfaces of the second preheating block (2) and the first preheating block (1); The second preheating block (2) also has a maintenance state away from the first preheating block (1), in which a maintenance space is formed between the second preheating block (2) and the first preheating block (1) for facilitating cleaning of the heating surface; The first preheating block (1) and / or the second preheating block (2) is provided with a heating element (3); Also includes: a preheating block locking structure, at least partially connected to the frame, adapted to lock the second preheating block (2) by connecting the second preheating block (2); The preheating block locking structure comprises: A locking seat connected to the frame; a plug-in assembly comprising a first part arranged on the locking seat and a second part arranged on the second preheating block (2); when the second preheating block (2) is in the maintenance state, the first part and the second part of the plug-in assembly are suitable for being connected by plugging; The first preheating block (1) and the second preheating block (2) are connected via a hinge; An adjustment seat is connected between the first preheating block (1) and the frame, and the adjustment seat has a fine-tuning structure for adjusting the parallelism between the preheating gap and the material flow line; The adjustment seat comprises: A vertical connecting plate, having a vertical surface in contact with the frame, and having long connecting holes and circular connecting holes arranged in sequence along the direction of the material flow line on the vertical connecting plate; A fine-tuning structure, mounted on the vertical connecting plate, having a slider (19) connected via a screw structure and capable of being adjusted up and down, the slider (19) being connected to the first preheating block (1); A detection plate (15) is provided at the right end of the upper surface of the second preheating block (2), and cooperates with a sensor (17) fixed to the frame via a sensor bracket (16), wherein the sensor (17) is a proximity sensor; the sensor bracket (16) is provided with two parallel long holes, and the long holes are used to adjust the position of the sensor (17) on the frame so that it cooperates with the detection plate (15) for better detection; when the second preheating block (2) is in a raised state, the detection plate (15) rotates accordingly and approaches the sensor (17), and the sensor (17) sends a detection signal to the controller, and the controller issues a warning prompt, so that the device cannot be started.

2. The preheating structure according to claim 1, characterized in that: Also includes: The preheating gap adjustment rod (7) has at least one, which is arranged on the first preheating block (1) and / or the second preheating block (2) and has an extended end that can be adjusted to extend between the second preheating block (2) and the first preheating block (1).

3. The preheating structure according to claim 2, characterized in that: The preheating gap adjustment rod (7) is connected to the first preheating block (1) and / or the second preheating block (2) via threads.

4. The preheating structure according to claim 1, characterized in that: Also includes: The driving assembly (8) has a driving end that can move linearly, and the driving end is connected to the second preheating block (2).

5. The preheating structure according to claim 4, characterized in that: Also includes: The towing assembly comprises a first connecting rod (9), one end of the first connecting rod (9) is hingedly connected to the driving end of the driving assembly (8), and the other end of the first connecting rod (9) is rotatably connected to the second preheating block (2); the second preheating block (2) is rotatably connected to the frame.

6. The preheating structure according to claim 5, characterized in that: The drag component also includes: The second connecting rod (10) has a bent structure, one end of which is hinged to the first connecting rod (9) and the other end of which is fixedly connected to the second preheating block (2).

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