CN110843195B

CN110843195B - Forming mechanism of blister packaging machine

Info

Publication number: CN110843195B
Application number: CN201911081810.3A
Authority: CN
Inventors: 袁晓磊; 蔡名洁; 王新河; 柯益荣
Original assignee: Zhejiang Ruian Hualian Pharmaceutical Machinery Co ltd; Wenzhou Polytechnic
Current assignee: Zhejiang Ruian Hualian Pharmaceutical Machinery Co ltd; Wenzhou Polytechnic
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2021-12-21
Anticipated expiration: 2039-11-07
Also published as: CN110843195A

Abstract

The invention discloses a forming mechanism of a blister packaging machine, which comprises an upper forming die and a lower forming die, wherein the lower forming die is arranged on a forming frame, and the forming mechanism is characterized in that a rotatable transmission shaft is arranged on the forming frame, a crankshaft is arranged on the transmission shaft, an eccentric wheel is arranged on the transmission shaft, the eccentric wheel is in contact with a roller fixed on a frame of the forming mechanism of the blister packaging machine, the crankshaft is connected with a movable frame through a shaft sleeve, the movable frame is connected with a bag box, the bag box is composed of a fixed upper box body and a slidable lower box body, an air bag is arranged in the bag box, and the lower box body is connected with the upper forming die. The structure of the invention utilizes the structure of the crank shaft and the eccentric wheel, so that the packaging mold is stable in state and not easy to jump when opening and closing the mold, and the structure of the air bag is adopted, so that the bubble cap can be stably formed, the reliability is high, and the structure is very suitable for bubble cap forming.

Description

Forming mechanism of blister packaging machine

Technical Field

The invention relates to a pharmaceutical machine, in particular to a blister forming mechanism of a blister packaging machine.

Background

The blister packaging machine is characterized by that after the forming mould is softened by heating device, the softened film is blown into blister by means of compressed air in the forming device, the filling device is used for filling the packaged material into blister, then the blister is fed into sealing device, and the covering film and forming mould are sealed under the condition of proper temp. and pressure, and finally the die-cutting device is used for cutting into the defined size so as to obtain the blister packaging product. At present, the die opening and closing processes of the blister packaging machine during molding are all that a cam structure is adopted to drive an upper die or a lower die to move. The Chinese patent database is checked to obtain the patent application with the publication number of CN109466051A and the name of 'a blister forming device for a blister forming machine', and the invention discloses the following contents: a blister forming device for a blister forming machine, characterized by: the automatic forming device comprises a male die and a groove, wherein the male die is fixedly connected to a male die base, the male die base is fixedly connected to a bottom plate stand column, a female die is fixedly connected to a groove base, the groove is movably connected to a guide rod, the guide rod is fixedly connected to the male die, a driving mechanism for driving the female die base to move is installed on the upper side of the female die base, the driving mechanism and the bottom plate stand column are installed on a support in a corona mode, a thin transmission belt is installed between the male die and the female die, a forming through hole is formed in the thin transmission belt, the support is of a horizontal U-shaped structure, a reset spring is sleeved on the guide rod, and two ends of the reset spring are abutted to the male die and the female die respectively. Meanwhile, the driving mechanism comprises a roller, a cam and a driving motor, the roller is rotatably connected to a roller frame, the roller frame is fixedly connected to the female die base, the cam is fixedly connected to an output shaft of the driving motor, the rotating axis of the cam is parallel to the axis of the valley wheel, the surface of the roller is always in contact with the surface of the cam, and the cam can be in contact with the male die and the female die after rotating. In the process of adopting the cam structure to move the upper die and the lower die, the phenomenon of jumping of the upper die and the lower die is easily caused, and the forming quality of the bubble cap is influenced. In the forming mechanism of the blister packaging machine, the spring is arranged on the upper die or the lower die to serve as a buffering return mechanism, and the spring has fatigue phenomenon and can influence the forming quality of the blister in the long-term use of the forming mechanism.

Disclosure of Invention

In view of the shortcomings of the background art, the technical problem to be solved by the invention is to provide a forming mechanism of a blister packaging machine, which improves the forming quality of blisters.

Therefore, the invention is realized by adopting the following technical scheme: a forming mechanism of a blister packaging machine comprises an upper forming die and a lower forming die, wherein the lower forming die is arranged on a forming frame, and the forming mechanism is characterized in that a rotatable transmission shaft is arranged on the forming frame, a crankshaft is arranged on the transmission shaft, an eccentric wheel is arranged on the transmission shaft, the eccentric wheel is in contact with a roller fixed on a forming mechanism rack of the blister packaging machine, the crankshaft is connected with a moving frame through a shaft sleeve, the moving frame is connected with a bag box, the bag box is composed of a fixed upper box body and a slidable lower box body, an air bag is arranged in the bag box, and the lower box body is connected with the upper forming die.

The upper box body is provided with a guide pillar, and the lower box body is sleeved on the guide pillar.

The lower box body is provided with a movable plate below, and the upper die and the movable plate are provided with mutually matched inclined planes.

The forming die is characterized by further comprising a locking cylinder, a piston rod of the locking cylinder is provided with an I-shaped locking rod, and the upper forming die and the lower forming die are provided with T-shaped grooves matched with the I-shaped locking rod.

The air bag is connected with the air compressor, a pressure sensor is arranged in the air bag and electrically connected with a controller, and the controller is electrically connected with an electromagnetic valve on a pipeline connecting the air bag and the air compressor.

The movable plate is connected with an adjusting rod in a threaded mode.

The structure of the invention ensures that the upper forming die and the lower forming die run stably and do not jump easily through the structure of the crankshaft and the eccentric wheel, the air bag is used as a buffer return mechanism, the air pressure in the air bag can be controlled at any time, and after the air bag is opened, the heated bubble cap strip is not easy to be contacted by the cold lower forming die to take away heat, thereby effectively ensuring the forming quality of the bubble cap.

Drawings

The details of the present invention are further described with reference to the accompanying drawings;

FIG. 1 is an overall block diagram of the present invention;

FIG. 2 is a view showing the construction of the present invention after the drive shaft housing is hidden;

FIG. 3 is a structural diagram of a crankshaft and an eccentric wheel arranged on a transmission shaft of the invention;

FIG. 4 is a view of the present invention after the lower case is hidden in FIG. 1;

FIG. 5 is a block diagram of the invention after the hidden bladder box of FIG. 1;

FIG. 6 is a view of the structure of the upper forming die and the locking cylinder;

FIG. 7 is a view showing a structure of the upper molding plate and the movable plate in cooperation according to the present invention;

FIG. 8 is a view of the structure of the lower forming die and the locking cylinder;

FIG. 9 is a view showing the structure of the lower molding die of the present invention in which the blister hole is provided.

Detailed Description

Referring to the attached drawings, the forming mechanism of the blister packaging machine comprises an upper forming die 8 and a lower forming die 10, wherein the upper forming die 8 is mounted on an upper forming template 9, the lower forming die 10 is mounted on a lower forming template 11, the lower forming die 10 is mounted on a forming frame 3 through the lower forming template 11, a rotatable transmission shaft 14 is mounted on the forming frame 3, a crankshaft 16 is arranged on the transmission shaft 14, an eccentric 13 is mounted on the transmission shaft 14, the eccentric 13 is in contact with a roller 15 fixed on a forming mechanism frame of the blister packaging machine, the crankshaft 16 is connected with a movable frame 5 through a shaft sleeve 12, the transmission shaft 14 is in transmission connection with a driving motor 1, and the structure of the crankshaft 16 and the eccentric 13 enables the driving motor 1 to drive the transmission shaft 14 to move under the action of the crankshaft 16, so as to drive the upper forming die 8 to move up and down, the eccentric wheel 13 is rotated to contact a roller 15 fixed to a frame of a forming mechanism of the blister pack machine, and a transmission shaft 14 is rotatably mounted to the forming frame 3, thereby driving the entire forming frame 3 to ascend and descend. It can be seen that when the film material of the present invention passes through the upper and lower forming dies for mold closing, the upper forming die 8 is subjected to mold closing by the crankshaft 16, and when the film material is opened, the upper forming die 8 is raised by the crankshaft 16, and at the same time, the forming frame 3 is lowered by the eccentric 13, so that the upper forming die 8 is also lowered, but the object of mold opening is achieved due to the different lead of the upper forming die 8 and the lower forming die 10. Another purpose of this eccentric 13 with the forming frame 3 lowered is: when the softened film passes between the upper and lower molds, the entire molding frame 3 is lowered to separate the lower mold 10 from the softened film, and the upper mold 8 is lowered at a predetermined distance from the softened film, so that the heat of the softened film is preferably maintained without contacting the softened film. In this embodiment, the movable frame 5 is connected to a bag box by a connecting rod 25, the bag box is composed of a fixed upper box 6 and a slidable lower box 7, an air bag 18 is provided in the bag box, and the lower box 7 is connected to the upper forming die 8 by an upper forming plate 9. The mode of the air bag replaces a return spring in the prior art, so that the buffer separation during mold closing is ensured, and the constant pressure during mold closing can be ensured. Wherein the constant pressure is controlled as follows: the air bag 18 is connected with an air compressor, a pressure sensor is arranged in the air bag 18 and electrically connected with a controller, and the controller is electrically connected with an electromagnetic valve on a pipeline connecting the air bag and the air compressor. For each batch of bubble cap forming, due to different specifications, a preset pressure can be set in the controller, and when the pressure sensor in the air bag 18 senses that the pressure is too high, the controller instructs the electromagnetic valve to open to deflate; when the pressure sensor in the air bag senses that the pressure is too small, the controller instructs the electromagnetic valve to open, and the negative pressure machine is started to inflate at the same time, so that the pressure of bubble caps with different specifications during die assembly is adapted, and the fixed die assembly force is ensured.

Wherein, lower box 7 adopts following mode sliding connection: the upper box body 6 is provided with a guide post 26, and the lower box body 7 is sleeved on the guide post 26, so that after die assembly, the upper forming die 8 can drive the lower box body 7 to move up and down on the guide post 26 and contact with the air bag 18, and a pressure sensor in the air bag 18 can sense the pressure during die assembly.

According to the invention, a movable plate 20 is arranged below the lower box body 7, the upper forming plate 9 connected with the upper forming die 8 and the movable plate 20 are provided with mutually matched inclined planes, and an adjusting rod 21 is screwed on the movable plate 20. When the adjusting rod 21 is rotated, the movable plate 20 can be pulled to move, and because the movable plate 20 is in inclined fit with the upper forming plate 9, the height of the upper forming plate 9 can be adjusted, and simultaneously the height of the upper forming die 8 is driven to be adjustable, so that the adjusting rod is suitable for film materials with different thicknesses.

In order to quickly install and position the upper forming die 8 and the lower forming die 10, the invention further comprises a locking cylinder 27, a piston rod 28 of the locking cylinder 27 is provided with an I-shaped locking rod 22, and the upper forming die 8 and the lower forming die 10 are provided with T-shaped grooves 23 matched with the I-shaped locking rod 22. For the upper forming die 8, in order to reduce the installation space, the cylinder body of the locking cylinder is arranged on the lower box body 7, for the lower forming die 10, the locking cylinder 27 is arranged on the lower forming plate 11, the locking rod 22 of the I-shaped structure is positioned in the T-shaped groove 23, when the locking cylinder 27 works, the locking rod 22 of the I-shaped structure is tensioned, so that the upper forming die 8 and the lower forming die 10 are locked and positioned, and the operation is simple and quick.

When the invention works, a film is heated and softened by a heating device and passes through between an upper forming die 8 and a lower forming die 10, wherein corresponding bubble cap holes 29 are arranged on the lower forming die 10 and the upper forming die 8, when a driving motor 1 works, the upper forming die 8 is driven to move downwards under the action of a crankshaft 16, a forming frame 3 moves upwards under the action of an eccentric wheel 14, the lower forming die 10 is driven to move upwards, after die assembly, the bubble cap holes 29 of the lower forming die 10 are blown, bubble caps are formed, then the driving motor 1 is driven continuously, the upper forming die 8 is driven to move upwards after the crankshaft 16 rotates by an angle, the whole forming frame 3 is driven to move downwards along with the rotation of the eccentric wheel 13, and the lower forming die 10 is driven to move downwards, so that the aim of die opening is achieved. The forming frame 3 is provided with a linear guide rail 4, and the frame of the blister packaging machine is provided with a slide block 2 matched with the linear guide rail, so that the forming frame 3 can slide up and down.

Claims

1. A forming mechanism of a blister packaging machine comprises an upper forming die and a lower forming die, wherein the lower forming die is arranged on a forming frame, and the forming mechanism is characterized in that a rotatable transmission shaft is arranged on the forming frame, a crankshaft is arranged on the transmission shaft, an eccentric wheel is arranged on the transmission shaft, the eccentric wheel is in contact with a roller fixed on a forming mechanism frame of the blister packaging machine, the crankshaft is connected with a moving frame through a shaft sleeve, the moving frame is connected with a bag box, the bag box is composed of a fixed upper box body and a slidable lower box body, an air bag is arranged in the bag box, the lower box body is connected with the upper forming die, a movable plate is arranged below the lower box body, and inclined planes matched with each other are arranged on the upper forming die and the movable plate.

2. The forming mechanism of a blister packaging machine according to claim 1, wherein the upper box is provided with a guide post, and the lower box is sleeved on the guide post.

3. The forming mechanism of a blister packaging machine according to claim 1, further comprising a locking cylinder, wherein a piston rod of the locking cylinder is provided with a locking rod with an I-shaped structure, and the upper forming die and the lower forming die are provided with T-shaped grooves matched with the locking rod with the I-shaped structure.

4. The forming mechanism of the blister packaging machine according to claim 1, wherein the air bag is connected with an air compressor, a pressure sensor is arranged in the air bag, the pressure sensor is electrically connected with a controller, and the controller is electrically connected with an electromagnetic valve on a connecting pipeline of the air bag and the air compressor.

5. The forming mechanism of a blister packaging machine according to claim 3, wherein the movable plate is screwed with an adjusting rod.