Heat sealing device for medicine subpackaging

Abstract

The invention provides a heat sealing device for medicine subpackaging, and relates to the field of medicine packaging. The heat-sealing device for medicine subpackaging comprises a heat-sealing thrust mechanism, a cutter thrust mechanism, a sealing and pressing mechanism and a heat-sealing base plate, the heat-sealing thrust mechanism is fixedly installed on the heat-sealing base plate, and a heat-sealing cam is embedded between two bearings of the sealing and pressing mechanism. According to the heat sealing device for medicine subpackaging, transverse heat sealing and longitudinal heat sealing are integrated through the fact that the working face of the sealing and pressing clamp is in a T shape, the same set of drive and control is used, and cost is saved; the heat sealing structure and the medicine bag conveying structure are independent, the medicine bag does not make contact with the sealing and pressing clamp after heat sealing is completed, and damage to the medicine bag caused by continuous heating of previous equipment is avoided; the depth of an easy-to-tear hole or a cut-off groove for cutting and processing the medicine bag by the cutter can be adjusted in a parameterization manner through the rotation angle of the cutter driving motor; the semi-closed state of the medicine bag pre-sealing opening facilitates reduction of random deformation of the medicine bag, and the influence on conveying tension and the flatness of the medicine bag is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pharmaceutical packaging, and specifically to a heat-sealing device for pharmaceutical sub-packaging. Background Art

[0002] Intelligent pharmaceutical sub-packaging equipment is a device that distributes drugs according to a doctor's electronic prescription and automatically seals them into bags using special packaging film materials. It has gradually been applied to the pharmacies of various hospitals. The packaging method it uses is mostly heat-sealing packaging. The main principle is based on the thermoplastic characteristics of the film material. The drug bags made of food-grade plastic film or composite film are heated at the horizontal and vertical parts to be sealed by a heat-sealing device above their melting points, and a certain pressure is applied to form a firm sealed bond at the two sides of the sealed part of the drug bag.

[0003] Defects and deficiencies of the prior art: In the past, most pharmaceutical sub-packaging machines used two different structures of heat-sealing devices, horizontal and vertical, to achieve the packaging of drugs into bags, with complex control and high costs.

[0004] Some equipment integrates the horizontal heat-sealing and drug bag conveying functions and adopts a double-cylindrical wheel structure. However, because it is necessary to achieve the conveying function, the conveying wheel must clamp the drug bag and maintain a certain pressure. In standby and other situations, it is easy to cause damage to the drug bag due to continuous heating. Therefore, there are high requirements for temperature control and drug bag materials.

[0005] To facilitate the separation of drug bags, the vertical sealing mechanism usually comes with a cutter that can process tear holes; the cutting depth of this cutter into the drug bag is a fixed size on some equipment. When the material or thickness of the drug bag changes, the effect of the tear hole is easily affected.

[0006] The drug bag material is a flexible film material. When drugs are loaded, the sealed part is prone to deformation, resulting in uneven and inconsistent packaging bags. Summary of the Invention

[0007] The purpose of the present invention is to provide a heat-sealing device for pharmaceutical sub-packaging, which solves the problems raised in the above background art.

[0008] Technical Solution

[0009] To achieve the above purpose, the present invention is realized through the following technical solutions: A heat-sealing device for pharmaceutical sub-packaging includes a heat-sealing thrust mechanism, a cutter thrust mechanism, a sealing and pressing mechanism, and a heat-sealing substrate. The heat-sealing thrust mechanism is fixedly installed on the heat-sealing substrate. The heat-sealing cam is installed between two bearings of the sealing and pressing mechanism. The cutter thrust mechanism is fixedly installed on the tool rest base of the hot pressing mechanism, and the outer contour of the cutter thrust cam on it is tangent to the cutter support bearing. The sealing and pressing mechanism is installed on the heat-sealing substrate through a linear guide rail.

[0010] Furthermore, the heat-sealing driving motor in the heat-sealing thrust mechanism is installed on the heat-sealing driving motor mounting plate, which drives the heat-sealing cam to rotate through the motor gear set and the secondary gear set. There are two pairs of bearing combinations between the motor gear set and the secondary gear set, which are installed on the heat-sealing thrust base.

[0011] Furthermore, the cutter driving motor in the cutter thrust mechanism is installed on the cutter motor mounting plate, which drives the cutter cam and the cutter induction piece to rotate through the tool rest thrust gear set.

[0012] Furthermore, a heat-insulating fixing block is installed on the back side of the sealing clamp in the sealing and pressing mechanism, and the two are connected through the transfer of the sealing clamp base and one of the sliders of the linear guide rail; a heating tube with a thermocouple is provided in the sealing clamp, and the temperature can be controlled through a temperature controller; a tool rest base is installed on the other slider of the linear guide rail, and a linear bearing is installed thereon. The tool rest guide shaft on the back of the cutter passes through the linear bearing, and the cutter is used to cut and process a tear hole or a cutting groove at the sealed mouth of the medicine bag; when the cutter cam on the cutter thrust mechanism rotates driven by the cutter driving motor, it drives the cutter to expand and contract through the rolling contact with the roller bearing, the action of the spring, and the guiding action of the linear bearing; an elastic sealing and pressing pad is installed on one side of the tool rest base facing the sealing clamp, and a cutter avoidance groove is provided in the middle; a roller bearing is installed on the other side of the tool rest base; a bearing mounting seat is installed on the slider of the linear guide rail, and a roller bearing is also provided thereon; there are two sealing clamp connecting rods on the left and right, one end of which is respectively connected and fixed to both sides of the bearing mounting seat, and the other end is respectively connected and fixed to both ends of the sealing clamp base; the tool rest base and the bearing mounting seat are connected by a spring; in this way, when the heat-sealing driving motor drives the heat-sealing cam to rotate, the distance between the tool rest base and the sealing clamp base changes mirror-symmetrically through the bearing mounting seat and the sealing clamp connecting rod with the change of the outer contour when the heat-sealing cam rotates, that is, the distance between the sealing clamp, the sealing and pressing pad and the cutter changes mirror-symmetrically with the change of the outer contour of the heat-sealing cam.

[0013] Furthermore, a heat-sealing induction piece is installed on one side of the tool rest base in the sealing and pressing mechanism, and a sensor for heat-sealing position is installed on the corresponding heat-sealing substrate. When the heat-sealing driving motor drives the heat-sealing cam to rotate to the heat-sealing and pressing position, the tool rest base drives the heat-sealing induction piece to reach the induction position of the photoelectric sensor, and the heat-sealing driving motor stops rotating. A cutter origin sensor and a cutter extension limit sensor are installed on the other side of the tool rest base in the sealing and pressing mechanism; when the cutter driving motor drives the cutter induction piece to rotate to the induction position of the cutter origin sensor, the cutter is in the retracted state, and when the cutter induction piece rotates to the induction position of the cutter origin sensor, the cutter is in the state of the maximum extension distance.

[0014] The present invention provides a heat-sealing device for pharmaceutical sub-packaging. It has the following beneficial effects:

[0015] The heat-sealing device for drug sub-packaging integrates the horizontal and vertical heat-sealing by using the working surface shape of the sealing clamp as T-shaped, and uses the same set of driving and control, saving costs; the heat-sealing structure is independent of the medicine bag conveying structure, and there is no contact between the medicine bag and the sealing clamp after heat-sealing, avoiding the damage caused by continuous heating of the medicine bag by the past equipment; the depth of the tear notch or cutting groove for cutting and processing the medicine bag by the cutter can be parametrically adjusted by adjusting the rotation angle of the cutter driving motor; the semi-closed state of the pre-sealed medicine bag is beneficial to reducing the random deformation of the medicine bag and reducing the influence on the conveying tension and the flatness of the medicine bag. Description of the Drawings

[0016] Figure 1 is the heat-sealing device of the present invention;

[0017] Figure 2 is the heat-sealing thrust mechanism of the present invention;

[0018] Figure 3 is the cutter thrust mechanism of the present invention;

[0019] Figure 4 is the sealing and pressing mechanism of the present invention;

[0020] Figure 5 is the heat-sealing schematic of the present invention

[0021] Figure 6 is the medicine bag schematic of the present invention

[0022] Figure 7 is the sealing clamp diagram of the present invention.

[0023] Among them, 1 is the sealing thrust mechanism, 2 is the cutter thrust mechanism, 3 is the sealing and pressing mechanism, 4 is the heat-sealing substrate, 5 is the medicine bag, 11 is the heat-sealing thrust base bracket, 12 is the heat-sealing driving motor, 13 is the motor gear set, 14 is the bearing, 15 is the secondary gear set, 16 is the heat-sealing cam, 21 is the cutter driving motor, 22 is the cutter motor mounting plate, 23 is the tool rest thrust gear set, 24 is the tool rest cam, 25 is the cutter induction piece, 31 is the sealing clamp base, 32 is the heat insulation fixing block, 33 is the sealing and pressing pad, 34 is the tool rest base, 35 is the bearing, 36 is the spring, 37 is the sealing clamp connecting rod, 38 is the sensor for heat-sealing position, 39 is the sealing clamp, 391 is the horizontal sealing part, 392 is the second horizontal sealing part, 393 is the vertical sealing part, 310 is the cutter, 311 is the heating pipe, 312 is the linear guide rail, 3121 is one slider, 3122 is the other slider, 3123 is the slider, 313 is the spring, 314 is the cutter support bearing, 315 is the linear bearing, 316 is the tool rest guide shaft, 317 is the bearing mounting seat, 318 is the heat-sealing induction piece, 319 is the cutter extension limit sensor, 320 is the cutter origin sensor, 51 is the pre-sealed medicine bag, 52 is the medicine bag, 51 is the horizontal part, 53 is the medicine bag, 51 is the vertical part, 54 is the tear notch, 55 is the second horizontal part, 56 is the cutting groove, 57 is the medicine, 58 is the current medicine bag. Detailed Embodiments

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figures 1-7 shown, an embodiment of the present invention provides a heat sealing device for drug sub-packaging, including a heat sealing thrust mechanism 1, a cutter thrust mechanism 2, a sealing and pressing mechanism 3, and a heat sealing substrate 4.

[0026] In the first embodiment of the present invention, the heat sealing thrust mechanism 1 is fixedly installed on the heat sealing substrate 4. The heat sealing cam 19 is embedded between two bearings 35 of the sealing and pressing mechanism 3. The cutter thrust mechanism 2 is fixedly installed on the tool rest base 34 of the hot pressing mechanism 3, and the outer contour 24 of the cutter thrust cam thereon is tangent to the cutter support bearing 314. The sealing and pressing mechanism 3 is installed on the heat sealing substrate 4 through a linear guide rail 311. The heat sealing drive motor 13 in the heat sealing thrust mechanism 1 is installed on the heat sealing drive motor mounting plate 12, and drives the heat sealing cam 19 to rotate through a motor gear set and a secondary gear set 18. There are two pairs of bearing combinations 16 between the motor gear set 14 and the secondary gear set 18, which are installed on the heat sealing thrust base 17. The cutter drive motor 21 in the cutter thrust mechanism 2 is installed on the cutter motor mounting plate 22, and drives the tool rest cam 24 and the cutter induction piece 25 to rotate through a tool rest thrust gear set 23.

[0027] In the second embodiment of the present invention, a heat insulation fixing block 32 is installed on the back side of the sealing and pressing clamp 39 in the sealing and pressing mechanism 3, and the two are connected through the adapter of the sealing and pressing clamp base 31 and one of the sliders 3121 of the linear guide rail 312; a heating pipe 311 with a thermocouple is provided in the sealing and pressing clamp 39, and the temperature can be controlled through a temperature controller; a tool holder base 34 is installed on the other slider 3122 of the linear guide rail 312, on which a linear bearing 314 is installed, and the tool holder guide shaft 316 on the back of the cutting knife 310 passes through the linear bearing 315. The cutting knife 310 is used to cut and process a tear hole 54 or a cutting groove 56 at the sealed part of the medicine bag; when the tool holder cam 24 on the cutting knife thrust mechanism 2 rotates under the drive of the cutting knife drive motor 21, through the rolling contact with the roller bearing 314, the action of the spring 313, and the guiding action of the linear bearing 315, it drives the cutting knife 310 to expand and contract; an elastic sealing and pressing pad 33 is installed on one side of the tool holder base 34 facing the sealing and pressing clamp 39, and a cutting knife avoidance groove is provided in the middle; a roller bearing 35 is installed on the other side of the tool holder base 34; a bearing mounting seat 317 is installed on the slider 3123 of the linear guide rail, and a roller bearing 35 is also provided thereon; there are two sealing and pressing clamp connecting rods 37 on the left and right, one end of each is respectively connected and fixed to both sides of the bearing mounting seat 317, and the other end is respectively connected and fixed to both ends of the sealing and pressing clamp base 31; the tool holder base 34 and the bearing mounting seat 317 are connected through a spring 36; thus when the heat sealing drive motor 13 drives the heat sealing cam 19 to rotate, the distance between the tool holder base 34 and the sealing and pressing clamp base 31 changes mirror-image along with the change of the outer contour when the heat sealing cam 19 rotates through the bearing mounting seat 317 and the sealing and pressing clamp connecting rod 37, that is, the distance between the sealing and pressing clamp 39, the sealing and pressing pad 33 and the cutting knife 310 changes mirror-image along with the change of the outer contour of the heat sealing cam 19.

[0028] In the third embodiment of the present invention, a heat sealing induction piece 318 is installed on one side of the tool holder base 34 in the sealing and pressing mechanism 3, and a sensor 38 for heat sealing position is installed on the corresponding heat sealing substrate 4. When the heat sealing drive motor 13 drives the heat sealing cam 19 to rotate to the heat sealing and pressing position, the tool holder base 34 drives the heat sealing induction piece 318 to reach the induction position of the photoelectric sensor 38, and the heat sealing drive motor stops rotating. A cutting knife origin sensor 320 and a cutting knife extension limit sensor 319 are installed on the other side of the tool holder base 34 in the sealing and pressing mechanism 3; when the cutting knife drive motor 21 drives the cutting knife induction piece 25 to rotate to the induction position of the cutting knife origin sensor 320, the cutting knife 310 is in a contracted state, and when the cutting knife induction piece 25 rotates to the induction position of the cutting knife extension limit sensor 319, the cutting knife 310 is in the state of the maximum extension distance. The working surface shape of the sealing and pressing clamp 39 is T-shaped. When heat sealing is carried out, such as Figure 6As shown, the horizontal sealing part 391 and the second horizontal sealing part 392 and the sealing pressure pad 33 complete the sealing of the horizontal part 52 and the second horizontal part 55 of the pre-sealed medicine bag 51. The vertical sealing part 393 and the sealing pressure pad 33 complete the sealing of the vertical part 53 of the pre-sealed medicine bag 51. The medicine bag 51 forms a semi-closed state to prepare for loading the medicine 57. At the same time, the sealing of the second horizontal part 55 and the sealing of the vertical part 53 also complete the full sealing of the current medicine bag 58.

[0029] Working principle: When the sealing pressure clamp 39 reaches the heat-sealing temperature through temperature control of the heating tube 311, it can heat-seal the medicine bag 5. The heat-sealing drive motor 13 in the sealing pressure thrust mechanism 1 drives the heat-sealing cam 19 to rotate. Through the rolling contact with the front and rear roller bearings 35 in the sealing pressure mechanism 3 and the action of the spring 36, it drives the sealing pressure clamp 39, the sealing pressure pad 33 and the cutting knife 310 to move synchronously in opposite directions along the linear guide rail 312. When the sensor 38 at the heat-sealing position receives a signal, the heat-sealing drive motor 13 stops rotating, and the sealing pressure clamp 39 realizes the semi-sealing of the pre-sealed medicine bag 51 and the full-sealing heat-sealing of the current medicine bag 58. At the same time, the cutting knife drive motor 21 drives the cutting knife 310 to extend from its origin position to the set parameter depth through the rolling contact with the roller bearing 314 and the action of the spring 313, and completes the processing of the easy tear opening 54 or the cutting groove 56 of the medicine bag 5. After the heat-sealing is completed, the cutting knife drive motor 21 drives the cutting knife to return to its origin position, and the heat-sealing drive motor 13 rotates in the reverse direction, driving the sealing pressure clamp 39 and the sealing pressure pad 33 to move synchronously in the opposite direction to release the sealing pressure on the medicine bag. After the medicine bag is conveyed forward, this process is cycled.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat-sealing device for pharmaceutical sub-packaging, comprising a heat-sealing thrust mechanism (1), a cutter thrust mechanism (2), a sealing and pressing mechanism (3), and a heat-sealing substrate (4), characterized in that: The heat-sealing thrust mechanism (1) is fixedly installed on the heat-sealing substrate (4). The heat-sealing cam 19 is fitted between two bearings (35) of the sealing and pressing mechanism (3). The cutter thrust mechanism (2) is fixedly installed on the tool rest base (34) of the hot pressing mechanism (3), and the outer contour (24) of the cutter thrust cam thereon is tangent to the cutter support bearing (314). The sealing and pressing mechanism (3) is installed on the heat-sealing substrate (4) through a linear guide rail (311).

2. The heat-sealing device for drug sub-packaging according to claim 1, wherein: The heat-sealing drive motor (13) in the heat-sealing thrust mechanism (1) is installed on the heat-sealing drive motor mounting plate (12), and drives the heat-sealing cam (19) to rotate through a motor gear set and a secondary gear set (18). There are two pairs of bearing combinations (16) between the motor gear set (14) and the secondary gear set (18), and they are installed on the heat-sealing thrust base (17).

3. A heat-sealing device for pharmaceutical sub-packaging according to claim 1, characterized in that: The cutter drive motor (21) in the cutter thrust mechanism (2) is installed on the cutter motor mounting plate (22), and drives the cutter cam (24) and the cutter induction piece (25) to rotate through a tool rest thrust gear set (23).

4. The heat-sealing device for drug sub-packaging according to claim 1, wherein: In the sealing and pressing mechanism (3), a heat insulation fixing block (32) is installed on the back side of the sealing and pressing clamp (39), and the two are connected through the transfer of the sealing and pressing clamp base (31) and one of the sliders (3121) of the linear guide rail (312); a heating tube (311) with a thermocouple is provided in the sealing and pressing clamp (39), and the temperature can be controlled through a temperature controller; a tool holder base (34) is installed on the other slider (3122) of the linear guide rail (312), and a linear bearing (314) is installed thereon. The tool holder guide shaft (316) on the back of the cutting knife (310) passes through the linear bearing (315). The cutting knife (310) is used to cut and process a tear hole (54) or a cut-off groove (56) at the sealed part of the medicine bag; when the tool holder cam (24) on the cutting knife thrust mechanism (2) rotates driven by the cutting knife driving motor (21), through the rolling contact with the roller bearing (314), the action of the spring (313), and the guiding action of the linear bearing (315), it drives the cutting knife (310) to expand and contract; on one side of the tool holder base (34) facing the sealing and pressing clamp (39), an elastic sealing and pressing pad (33) is installed, and a cutting knife avoidance groove is provided in the middle; a roller bearing (35) is installed on the other side of the tool holder base (34); a bearing mounting seat (317) is installed on the slider (3123) of the linear guide rail, and a roller bearing (35) is also provided thereon; there are two sealing and pressing clamp connecting rods (37), one end of each is respectively connected and fixed to the two side surfaces of the bearing mounting seat (317), and the other end is respectively connected and fixed to the two ends of the sealing and pressing clamp base (31); the tool holder base (34) and the bearing mounting seat (317) are connected through a spring (36); thus, when the heat sealing driving motor (13) drives the heat sealing cam (19) to rotate, the distance between the tool holder base (34) and the sealing and pressing clamp base (31) changes mirror-like with the change of the outer contour of the heat sealing cam (19) through the bearing mounting seat (317) and the sealing and pressing clamp connecting rod (37), that is, the distance between the sealing and pressing clamp (39), the sealing and pressing pad (33), and the cutting knife (310) changes mirror-like with the change of the outer contour of the heat sealing cam (19).

5. The heat-sealing device for pharmaceutical sub-packaging according to claim 1, characterized in that: A heat sealing induction sheet (318) is installed on one side of the tool holder base (34) in the sealing and pressing mechanism (3), and a sensor (38) for heat sealing position is installed on the corresponding heat sealing substrate (4). When the heat sealing driving motor (13) drives the heat sealing cam (19) to rotate to the heat sealing and pressing position, the tool holder base (34) drives the heat sealing induction sheet (318) to reach the induction position of the photoelectric sensor (38), and the heat sealing driving motor stops rotating. A cutting knife origin sensor (320) and a cutting knife extension limit sensor (319) are installed on the other side of the tool holder base (34) in the sealing and pressing mechanism (3); when the cutting knife driving motor (21) drives the cutting knife induction sheet (25) to rotate to the induction position of the cutting knife origin sensor (320), the cutting knife (310) is in the contracted state, and when the cutting knife induction sheet (25) rotates to the induction position of the cutting knife extension limit sensor (319), the cutting knife (310) is in the state with the maximum extension distance.

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