Paper roll uncoiling and coiling device for LTCC (Low Temperature Co-Fired Ceramic) plane printing

Abstract

The invention discloses a paper roll uncoiling and coiling device for LTCC (Low Temperature Co-Fired Ceramic) plane printing, which is characterized in that rotating shafts are arranged at the bottom ends of shaft bodies of expansion shafts, the two expansion shafts are respectively positioned on two sides of a printing platform to serve as an uncoiling shaft and a coiling shaft of a paper roll, and the rotating shafts of the two expansion shafts are respectively connected with a motor for driving to rotate forwards and backwards; a paper tape pulled out of the paper roll is flatly laid on the surface of the printing platform; the center of the top end of the shaft body is fixedly connected with the bottom of the core rod; the core rod between the shaft body and the movable ejector block is sequentially sleeved with an expansion sleeve, a fixed seat, a pressure spring and a movable outer sleeve, and the fixed seat and the pressure spring are located in an inner cavity of the movable outer sleeve; when the movable ejector block rotates, the movable outer sleeve is driven to do axial displacement towards the shaft body, the movable outer sleeve pushes the first outer chamfering part and the second outer chamfering part to be embedded into the concave cavities in the two end faces of the expansion sleeve correspondingly, and the two expansion blocks are driven to do radial displacement. The mounting and the dismounting can be conveniently completed by pulling the movable top block; the concentricity of the paper tape and a printing workpiece is improved, and rotation is stable and reliable.

Description

Technical Field

[0001] The invention relates to an unwinding and winding device for a paper roll used for LTCC flat printing. Background Art

[0002] With the vigorous development of the printing industry, the competition in the industry is becoming increasingly fierce, which puts forward higher requirements for the convenience and versatility of the equipment. In the semi-automatic paper roll flat printing equipment, the rotating shaft supporting the rotation of the paper roll must firmly fix the inner core tube of the paper roll mounted on the rotating shaft to ensure that there is no slippage between the two during the winding / unwinding process. At present, the method of pressing the rotating workpiece (such as bolts) is generally adopted. This method requires the rotation and loosening of the workpiece to complete the fixing and separation of the rotating shaft and the inner core tube of the paper roll, which increases the labor load of workers in installing and removing the paper roll, affecting production efficiency. At the same time, in LTCC flat printing, the unwinding / winding rotating shafts of the paper roll are located on both sides of the printing platform (ceramic platform), and are driven by motors for forward and reverse rotation. The paper tape pulled out of the paper roll is laid flat on the surface of the printing platform. The alignment accuracy of the printing platform and the paper tape is high. However, under the existing paper roll fixing method, the paper tape is prone to deviation during multiple operations, which cannot meet the work requirements. Summary of the invention

[0003] In order to solve the above-mentioned drawbacks, the technical problem to be solved by the present invention is to provide a paper roll unwinding and winding device for LTCC flat printing, which effectively reduces the labor intensity of installing and disassembling paper rolls, and improves production efficiency and paper tape positioning accuracy. In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is a paper roll unwinding and winding device for LTCC flat printing, characterized in that it includes a tensioning shaft, a rotating shaft is provided at the bottom end of the shaft body of the tensioning shaft, and the two tensioning shafts are respectively located on both sides of the printing platform as the unwinding shaft and the winding shaft of the paper roll, and the rotating shafts of the two tensioning shafts are respectively connected to the motor drive for forward and reverse rotation, and the paper tape pulled out of the paper roll is laid flat on the surface of the printing platform;

[0004] The top end of the shaft body is centrally fixed to the bottom of the core rod, and the top of the core rod is hinged to the movable top block; the core rod between the shaft body and the movable top block is sequentially covered with a tightening sleeve, a fixing seat, a compression spring and a movable outer sleeve, and the fixing seat and the compression spring are located in the inner cavity of the movable outer sleeve; one end of the compression spring acts on the fixing seat, and the other end acts on the inner side of the top of the movable outer sleeve; the fixing seat is fixed on the core rod;

[0005] The expansion sleeve is located between the top of the shaft body and the bottom of the movable outer sleeve. The expansion sleeve is composed of two expansion blocks. The two expansion blocks are connected by a tension spring to form an expansion sleeve. The expansion sleeve has an inner cavity that embraces the core rod. Concave cavities are arranged on both end surfaces of the expansion sleeve, and an inner chamfer is arranged on the inner edge of the annular boss on the outer periphery of the concave cavity.

[0006] The top periphery of the shaft body is provided with a first outer chamfered portion, and the bottom periphery of the movable outer sleeve is provided with a second outer chamfered portion, and the first outer chamfered portion and the second outer chamfered portion respectively abut against the inner chamfered portions of the two end surfaces of the expansion sleeve;

[0007] The movable top block abuts against the outer side of the top of the movable outer sleeve. When the movable top block rotates, it drives the movable outer sleeve to make axial displacement toward the shaft body. The movable outer sleeve pushes the first outer chamfered portion and the second outer chamfered portion to be respectively embedded in the concave cavities at the two end surfaces of the expansion sleeve, driving the two expansion blocks to make radial displacement.

[0008] The beneficial effect of the present invention is that the expansion shaft is sleeved in the inner tube of the paper roll, and the expansion / relaxation state of the expansion shaft and the inner tube wall of the paper roll can be switched by turning the movable top block, so that installation and disassembly can be completed conveniently, the labor intensity of operation can be effectively reduced, and production efficiency can be improved; the paper roll can rotate smoothly and reliably during unwinding and rewinding, the alignment accuracy of the paper tape unwound from the paper roll and the printing workpiece on the printing platform is improved, and the high alignment accuracy of the paper tape and the printing platform is effectively maintained, thereby ensuring the quality of printing work.

[0009] In one embodiment, the outer circumferences of the two expansion blocks are respectively provided with concave platform portions, and the two ends of the tension spring are respectively fixed on the two platform portions, so as to provide reliable elastic connection tension for the two expansion blocks, so that the expansion sleeve can better embrace the core rod.

[0010] In one embodiment, the printing platform has a negative pressure adsorption mechanism for adsorbing the paper tape, and a positioning mechanism is installed below the printing platform, and the positioning mechanism is provided with an X / Y / Z axis direction positioning adjustment mechanism to further ensure the quality of printing work.

[0011] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time.

[0012] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0013] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention / invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention / invention.

[0014] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention / invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0015] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0017] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the device from a first perspective;

[0019] Figure 2 A second perspective schematic diagram of the overall structure of the device;

[0020] Figure 3 This is a schematic diagram of the main structure of the expansion shaft;

[0021] Figure 4 The schematic diagram of the structure of the expansion shaft from a bottom view;

[0022] Figure 5 The three-dimensional structural diagram of the expansion shaft is shown in FIG.

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the expansion shaft (relaxed state);

[0024] Figure 7 for Figure 6 A partial enlarged structural schematic diagram of part A shown;

[0025] Figure 8 It is a schematic diagram of the cross-sectional structure of the expansion shaft (expanded state). DETAILED DESCRIPTION

[0026] See attached Figure 1-8 , reflecting a specific structure of the present invention. The paper roll unwinding and winding device for LTCC flat printing includes a tensioning shaft 1, a rotating shaft 101 is centrally provided at the bottom end of the shaft body 100 of the tensioning shaft 1, and a limiting protrusion 1002 is provided at the outer periphery of the bottom end of the shaft body 100 to limit the fitting position of the inner tube of the paper roll 3. The tensioning shaft 1 is provided with a rotating shaft at only one end instead of rotating shafts at both ends for rotational positioning. This tensioning shaft 1 with one-end positioning can better simplify the device to adapt to the working scene of the printing platform.

[0027] Two tensioning shafts 1 are respectively located on both sides of the printing platform 2 as the unwinding shaft and the rewinding shaft of the paper roll 3. The rotating shafts 101 of the two tensioning shafts 1 are respectively connected to the motor 4, and driven by the motor 4 to rotate forward and reversely. The paper tape pulled out of the paper roll 3 is laid flat on the surface of the printing platform 2. In the example, the printing platform 2 has a negative pressure adsorption mechanism 202 for adsorbing the paper tape, and a positioning mechanism 201 is installed under the printing platform 2. The positioning mechanism 201 is a three-dimensional positioning adjustment mechanism that can be independently adjusted in three dimensions of the X / Y / θ axis to accurately position and adjust the printing platform. Ensure the quality of printing work.

[0028] The top end of the shaft body 100 is centrally fixed to the bottom of the core rod 102, and the top of the core rod 102 is hinged to the movable top block 103; the core rod 102 between the shaft body 100 and the movable top block 103 is sequentially covered with a tightening sleeve 104, a fixed seat 105, a compression spring 106 and a movable outer sleeve 107, and the fixed seat 105 and the compression spring 106 are located in the inner cavity of the movable outer sleeve 107; one end of the compression spring 106 acts on the fixed seat 105, and the other end acts on the inner side of the top of the movable outer sleeve 107; the fixed seat 105 is fixed to the core rod 102 by a pin 108.

[0029] The expansion sleeve 104 is located between the top of the shaft body 100 and the bottom of the movable outer sleeve 107. The expansion sleeve 104 is composed of a first expansion block 104a and a second expansion block 104b. The two expansion blocks are connected by a tension spring 109 to form the expansion sleeve 104. The expansion sleeve 104 has a semicircular inner cavity that embraces the core rod 102. In the example, the outer circumferences of the two expansion blocks are respectively provided with concave platform parts 1044, and the two ends of the tension spring 109 are respectively fixed on the two platform parts 1044. Thereby, a reliable elastic connection tension is provided for the two expansion blocks, so that the expansion sleeve can better embrace the core rod.

[0030] The two end surfaces of the expansion sleeve 104 are provided with concave cavities 1041, and the inner edge of the annular boss 1042 on the outer periphery of the concave cavity 1041 is provided with an inner chamfer 1043;

[0031] The top periphery of the shaft body 100 is provided with a first outer chamfered portion 1001 , and the bottom periphery of the movable sleeve 107 is provided with a second outer chamfered portion 1071 . The first outer chamfered portion 1001 and the second outer chamfered portion 1071 respectively abut against the inner chamfered portions 1043 at both end surfaces of the expansion sleeve 104 .

[0032] The movable top block 103 abuts against the top outer side of the movable outer sleeve 107. When the movable top block 103 is pulled and rotated, the movable outer sleeve 107 is driven to make axial displacement in the direction of the shaft body 100 (the compression spring 106 is elastically compressed). The movable outer sleeve 107 pushes the first outer chamfered portion 1001 and the second outer chamfered portion 1071 to be respectively embedded in the concave cavities 1041 at the two end surfaces of the expansion sleeve 104, driving the first expansion block 104a and the second expansion block 104b to make radial displacement outwards respectively (the tension spring 109 is elastically stretched), so that the radial size of the expansion shaft 1 is expanded. Since the expansion shaft 1 is sleeved in the inner tube at the center of the paper roll 3, it enters the expansion state, effectively fixing the paper roll 3.

[0033] When the paper roll 3 needs to be removed, the movable top block 103 is rotated and reset in the opposite direction, the compression spring 106 elastically deforms and restores the movable cover 107, and the tension spring 109 elastically deforms and restores the first expansion block 104a and the second expansion block 104b to radially move inward and reset, and the expansion shaft 1 returns to the relaxed state, and the paper roll 3 can be removed.

[0034] As can be seen from the above, by adopting the technical solution of the present invention, the switching of the expansion / relaxation state between the rotating shaft and the inner tube wall of the paper roll can be realized by turning the movable top block, so as to conveniently complete the installation and disassembly, effectively reduce the labor intensity of the operation, and improve the production efficiency; the first expansion block 104a and the second expansion block 104b are synchronously expanded radially outward, which not only reliably realizes the expansion and fixation without loosening, but also the force on the inner tube of the paper roll is balanced and stable, the unwinding and rewinding forces are balanced, and the alignment accuracy of the paper tape unwound from the paper roll and the printing workpiece on the printing platform is effectively improved. At the same time, the paper roll rotates smoothly and reliably during the unwinding and rewinding process, and reliably maintains high-precision alignment to ensure the quality of printing work. Moreover, the expansion shaft 1 provided by the present invention can meet the reliability requirements of the unwinding and rewinding of the paper roll for LTCC flat printing when one end is positioned.

[0035] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and describes these embodiments in detail in conjunction with the accompanying drawings in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can understand and use the present invention well. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is only limited by the claims and their full scope and equivalents, and is not limited by the specific embodiments disclosed.

Claims

1. A paper roll unwinding and rewinding device for LTCC flat printing, characterized in that: It includes a tensioning shaft, a rotating shaft is provided at the bottom end of the shaft body of the tensioning shaft, and two tensioning shafts are respectively located on both sides of the printing platform as an unwinding shaft and a rewinding shaft of the paper roll, and the rotating shafts of the two tensioning shafts are respectively connected to the motor drive for forward and reverse rotation, and the paper tape pulled out of the paper roll is laid flat on the surface of the printing platform; The top end of the shaft body is centrally fixed to the bottom of the core rod, and the top of the core rod is hinged to the movable top block; the core rod between the shaft body and the movable top block is sequentially covered with a tightening sleeve, a fixing seat, a compression spring and a movable outer sleeve, and the fixing seat and the compression spring are located in the inner cavity of the movable outer sleeve; One end of the compression spring acts on the fixed seat, and the other end acts on the inner side of the top of the movable outer sleeve; the fixed seat is fixed on the core rod; The expansion sleeve is located between the top of the shaft body and the bottom of the movable outer sleeve. The expansion sleeve is composed of two expansion blocks. The two expansion blocks are connected by a tension spring to form an expansion sleeve. The expansion sleeve has an inner cavity that embraces the core rod. Concave cavities are arranged on both end surfaces of the expansion sleeve, and an inner chamfer is arranged on the inner edge of the annular boss on the outer periphery of the concave cavity. The top periphery of the shaft body is provided with a first outer chamfered portion, and the bottom periphery of the movable outer sleeve is provided with a second outer chamfered portion, and the first outer chamfered portion and the second outer chamfered portion respectively abut against the inner chamfered portions of the two end surfaces of the expansion sleeve; The movable top block abuts against the outer side of the top of the movable outer sleeve. When the movable top block rotates, it drives the movable outer sleeve to make axial displacement toward the shaft body. The movable outer sleeve pushes the first outer chamfered portion and the second outer chamfered portion to be respectively embedded in the concave cavities at the two end surfaces of the expansion sleeve, driving the two expansion blocks to make radial displacement.

2. A paper roll unwinding and winding device for LTCC flat printing as claimed in claim 1, characterized in that: The outer circumferential surfaces of the two expansion blocks are respectively provided with concave platform parts, and the two ends of the tension spring are respectively fixed on the two platform parts.

3. A paper roll unwinding and winding device for LTCC flat printing as claimed in claim 1 or 2, characterized in that: The printing platform is provided with a negative pressure adsorption mechanism for adsorbing the paper tape, and a positioning mechanism is arranged below the printing platform, wherein the positioning mechanism is provided with a positioning adjustment structure in the X / Y / Z axis directions.

Images