Patent Application
20240369303
The present invention relates to an airflow orifice adjusting device of a package thermal-shrinking oven, and in particular to an airflow orifice adjusting device that is used in a package thermal-shrinking oven for heat-shrinking packaging of an object and includes a plurality of adjusting levers that are operable for moving airflow-blocking adjusting plates to adjust discharge and flowrate of hot airflows.
Package thermal-shrinking ovens have been widely used in packaging applications for various packaged objects, particularly for various heat-shrinkable film sealed packaged objects that may have different outside contours and shapes, such as meal boxes, noodles, medicinal cuisines, salads, compact disc (CD) boxes, gifts, and so on. Thus, it is necessary to arrange a hot airflow box in a known package thermal-shrinking oven, and airflow orifices are formed in the hot airflow box for discharging hot airflows that are necessary for shrinking of the heat-shrinkable film sealed packaged object. However, the hot airflow flowrate discharged from the airflow orifice of the hot airflow box arranged inside the known package thermal-shrinking oven is not adjustable, and it is also impossible to control the hot airflow not to discharge from a partial area. This makes it impossible for the hot airflow box in the package thermal-shrinking oven to properly adjust, for each airflow orifice of the hot airflow box that corresponds to a heat-shrinking packaging site, the hot airflow flowrate, and also to control it for discharging or not, according to different shapes and sizes of the packaged object and the heat-shrinking property of the heat-shrinkable packaging film. This leads to inhomogeneity of the heat-shrinking packaging quality of the packaged object. This is a problem to be handled for the known package thermal-shrinking oven.
Certain known package thermal-shrinking ovens are designed, according to different shapes and sizes of packaged objects and the heat-shrinking properties of heat-shrinkable package films, to include hot airflow boxes having airflow orifices of different sizes and different locations of distribution, so that in applications for operation with different shapes and sizes of packaged objects and heat-shrinkable package films having different heat-shrinking properties, the hot airflow boxes may be swapped for improving the packaging quality. This, however, greatly increases the installation expenditure and swapping of the hot airflow boxes must be practiced by professional technicians for calibration and replacement. Further, the operation of swapping can only be carried out when the package thermal-shrinking oven is shut down and the internal temperature has dropped to a safe level. This increases the complication and difficulty of the swapping operation of the hot airflow boxes, and additional work hours, human labor, and cost are required, making it lacking industrial utilization and economic value.
Prior art patent documents are known, such as Taiwan Utility Model M636117, which discloses a hot airflow adjusting structure of a typical known package thermal-shrinking oven, wherein a hot airflow adjusting assembly (3) includes an airflow guide seat (31) arranged in an airflow discharging opening (23). An axle (32) extends through the hot airflow adjusting assembly (3), and the axle (32) penetrates through an outside wall (22) of a hot baking box (2) to position the airflow guide seat (31) in the airflow discharging opening (23). An outer section of the axle (32) is correspondingly combined with a control lever (33), and the control lever (33) is provided for adjusting, and positioning, a rotating angle of the airflow guide seat (31). In other words, it is only good for roughly adjusting the direction angle and path of the hot airflow in the hot baking box (2), and it is not possible to control the hot airflow flowrate, and discharge of hot airflow from each one corresponding to the packaging site or not, according to the shape and size of a packaged object passing through the hot baking box (2) and the heat-shrinking property of the heat-shrinkable package film, thus suffering, similar to the prior, the hot airflow box arranged in the interior of the known package thermal-shrinking oven being incapable of properly adjusting, according to different shapes and sizes of packaged objects and heat-shrinking properties of heat-shrinkable package films, the hot airflow flowrate discharging from each airflow orifice of the hot airflow box that corresponds to a heat-shrinking packaging site, and also discharging hot airflow therefrom or not, and thus leading to a problem and drawback of inhomogeneity of the heat-shrinking packaging quality of the packaged object and incapability of further improving.
In addition, Taiwan Utility Model M264494, which provides an improved structure of hot baking machine, and Taiwan Utility Model M572035, which provides a pre-shrinking oven structure for fitting heat-shrinkable film label, propose another typical known package thermal-shirking oven technology, wherein replacing a heat-conducting board (4) and a heat-isolating board (5) of a hot baking machine (1) disclosed in Taiwan Utility Model M264497 and a replacement operation of a shielding plate (60) of a thermal-shrinking oven body (10) disclosed in Taiwan Utility Model 572035 both require the hot baking machine (1) and the thermal-shrinking oven body (l0) to be shut down and cooled to drop to a safe temperature before the replacement of the heat-conducting board (4) and the heat-isolating board (5) and the replacement of the shielding plate (60) can be carried out, making the operations for replacement of the heat-conducting board (4) and the heat-isolating board (5) and replacement of the shielding plate (60) complicated and difficult. Further, for control of the hot airflow flowrate and control of airflow discharging or not, the two documents are incapable of precisely controlling and still suffer, similar to the prior art package thermal-shrinking ovens, greatly increasing the cost of equipment replacement for replacement of the heat-conducting board (4) and the heat-isolating board (5) and the replacement of the shielding plate (60) and requiring professional technicians for calibration and replacement for the replacement of the heat-conducting board (4) and the heat-isolating board (5) and the replacement of the shielding plate (60) and the replacement operation being only carried out when the package thermal-shrinking oven has been shut down and the internal temperature thereof has dropped to a safe level, thereby making the replacement operations of the internal components for the hot baking machine (1) and the thermal-shrinking oven body (10) complicated and difficulty and consuming additional work hours, human labor, and cost.
The previously discussed known package thermal-shrinking oven or those from the above-mentioned patents all suffer problems and drawbacks that it is impossible to adjust the hot airflow flowrate corresponding to a heat-shrinking packaging site inside a package thermal-shrinking oven in real time, and also being uncontrollable for discharging the hot airflow or not, according to different shapes and sizes of various packaged objects and heat-shrinking packaging properties of heat-shrinkable package film so as not to allow the heat-shrinking packaging quality of the packaged object to further enhance, and also, an operation of swapping or replacing airflow flowrate controlling components inside the package thermal-shrinking oven, such as heat-conducting board, heat-isolating board, and shielding plate is complicated and difficult so as to greatly increase the equipment cost, and further, replacing of a hot airflow box assembly must be implemented by professional technicians for calibration and replacement, and can be performed only after the package thermal-shrinking oven has been shut down and the internal temperature has dropped to a safe temperature level, making the replacing operation of the hot airflow box even more complicated and more difficult, and consuming increased working hours, human labor, and cost, making it lacking industrial utilization and economic value.
Thus, the present invention provides an airflow orifice adjusting device of a package thermal-shrinking oven, which comprises:
Further, in the above described airflow orifice adjusting device of the package thermal-shrinking oven, each of airflow orifices of the airflow orifice board comprises an elongated hole.
In the above described airflow orifice adjusting device of the package thermal-shrinking oven, the track holes of the track board comprise a horizontal elongated hole.
In the above described airflow orifice adjusting device of the package thermal-shrinking oven, the track board is provided with a through axle hole, and the through axle hole longitudinally extends across each of the track holes, and the operating portion of each of the adjusting levers is formed with a through aperture, the through aperture corresponding to and matching with the through axle hole of the track board, so that a rotation axle penetrates through the through axle hole of the track board and the through aperture of the operating portion of each of the adjusting levers to allow the rotation axle to function as a support point for the leftward or rightward horizontal pushing operation of the operating portion of each of the adjusting levers.
In the above described airflow orifice adjusting device of the package thermal-shrinking oven, at least one scale board is mounted to a bottom portion of the track board, and the scale board is provided thereon with a plurality of markings to provide an indication for a displacement of a horizontal leftward or rightward operation of the operating portion at one end of each of the adjusting levers and to serve as an indication of an operation position of each of the airflow orifices of the airflow orifice board for completely or partially matching with or completely un-matching with a corresponding one of the airflow orifices.
In the above described airflow orifice adjusting device of the package thermal-shrinking oven, the markings of the scale board mounted to the bottom portion of the track board respectively indicate states that the airflow orifices of the airflow orifice board completely discharge a full flowrate of the hot airflow, partially discharge a half flowrate of the hot airflow, and are completely blocked for discharging no hot airflow.
In the above described airflow orifice adjusting device of the package thermal-shrinking oven, one end of the operating portion of each of the adjusting levers is provided with at least one pivotal connection portion, and the pivotal connection portion is formed with a pivotal connection hole, and an end of the connecting portion of the adjusting levers that is not connected with the corresponding airflow-blocking adjusting plate is formed with at least one joining opening to receive the pivotal connection portion of the operating portion to correspondingly insert therein, and the joining opening having top and bottom that are each formed with a connecting threaded hole to correspond to the pivotal connection hole of the operating portion to receive at least one bolt extending through and fastened to the connecting threaded holes and the pivotal connection hole to function as a center of rotation axle of an interlinked operation between the operating portion and the connecting portion.
In the above described airflow orifice adjusting device of the package thermal-shrinking oven, the adjusting orifices of the airflow-blocking adjusting plates comprise an elongated hole.
In the above described airflow orifice adjusting device of the package thermal-shrinking oven, one end of the connecting portion of each of the adjusting levers is provided with a connecting threaded rod, and one end of the airflow-blocking adjusting plate is formed with a threaded hole, which is corresponding to and fastened to the threaded rod of the connecting portion.
The efficacy of the airflow orifice adjusting device of the package thermal-shrinking oven according to the present invention is that a combination of the airflow orifice board, the track board, the plurality of adjusting levers, and the plurality of airflow-blocking adjusting plate enables precise control the airflow orifices of the airflow orifice board and the adjusting orifices of the airflow-blocking adjusting plates to be completely matching, partially matching, or completely un-matching by means of a simple operation of pushing the operating portions of the adjusting levers in a horizontally leftward or rightward direction, so that the hot airflows discharging from the hot airflow box of the package thermal-shrinking oven through the airflow orifices of the airflow orifice board is adjustable in a stepless manner in respect of the flowrate thereof and is controllable for blocking and not discharging hot airflow, and, based on different shapes and sizes of various packaged objects and heat-shrinking packaging properties of different heat-shrinkable package films, an optimum adjustment of the hot airflow flowrate corresponding to the heat-shrinking packaging site inside the package thermal-shrinking oven and control of discharging a hot airflow can be realized, and particularly, the operating portions of the adjusting levers are arranged, following the arrangement of the track boards, to be located outside of the package thermal-shrinking oven, so that without any need to shut down the package thermal-shrinking oven first, an operator may safely operate, at outside of the package thermal-shrinking oven, the operating portions of the adjusting levers to horizontally move leftward or rightward, and consequently, by means of such a way of easy and safe operation and accurate adjusting, without shutting down the machine, the hot airflow flowrate discharging through the airflow orifices of the airflow discharging board and control of discharging airflow or not, a great amount of working hours, human labor, and facility expenditure can be saved, and time-efficient and enhanced heat-shrinking packaging quality for heat-shrinking packaging of a packaged object in the package thermal-shrinking oven can be improved without shutting down machine, so as to completely eliminate the problems of drawbacks of the prior art and each of the patent documents to thereby increase the industrial utilization and economic value of the present invention.
Referring firstly to
At least one track board 20 is provided, and the track board 20 is mounted to an outside of the hot airflow box 210. The track board 20 is formed with a plurality of track holes 21, and the track board 20 is provided with a through axle hole 22, such that the through axle hole 22 longitudinally penetrates across each of the track holes 21. The track holes 21 are not limited to any specific shape, and a horizontal elongated hole is taken as an example for illustration in the present invention.
A plurality of adjusting levers 30 are provided, and each of the adjusting levers 30 has two ends that are respectively formed as a connecting portion 31 and an operating portion 32. The connecting portions 31 extend through the track holes 21 of the track board 20. The connecting portions 31 each have two ends that are respectively provided with a joining opening 311 and a connecting threaded rod 312. The joining opening 311 is defined between a top and a bottom that are each formed with a connecting threaded hole 311A. The operating portion 32 is formed in a middle thereof with a through aperture 321, and the through aperture 321 corresponds to and matches with the through axle hole 22 of the track board 20, so that a rotation axle 321A penetrates through the through axle hole 22 of the track board 20 and the through aperture 321 of the operating portion 32 of each of the adjusting levers 30 to allow the rotation axle 321A to function as a support point for a leftward or rightward horizontal pushing operation of the operating portion 32 of each of the adjusting levers 30 to allow the operating portion 32 to be operated for horizontally pushing leftward or rightward. One end of the operating portion 32 is provided with at least one pivotal connection portion 322, and the pivotal connection portion 322 is formed with a pivotal connection hole 322A. The pivotal connection portion 322 of the operating portion 32 is corresponding to and insertable into the joining opening 311 at one end of the connecting portion 31 to have the pivotal connection hole 322A corresponding to and matching with the connecting threaded holes 311A at the top and the bottom of the joining opening 311 of the connecting portion 31. At least one bolt 322B penetrates through the connecting threaded holes 311A and the pivotal connection hole 322A. The bolt 322B functions as a center of rotation axle of an interlinked operation between the operating portion 32 and the connecting portion 31, so that the connecting portion 31 is driven by the leftward or rightward horizontal pushing operation of the operating portion 32 to make the connecting portion 31 performing a reversely directed horizontal motion in a rightward or leftward direction.
A plurality of airflow-blocking adjusting plates 40 are provided, and each of the airflow-blocking adjusting plates 40 is mounted on the airflow orifice board 10, and the airflow-blocking adjusting plates 40 are each formed with a plurality of adjusting orifices 41, such that each of the adjusting orifices 41 corresponds to one of the airflow orifices 11 of the airflow orifice board 10. The adjusting orifices 41 are not limited to any specific shape, and an elongated hole is taken as an example for illustration in the present invention. The airflow-blocking adjusting plates 40 are each formed, in one end thereof, with a threaded hole 42, which is corresponding to and connected with the connecting threaded rod 312 at one end of the connecting portion 31 of a corresponding one of the adjusting levers 30 to allow the airflow-blocking adjusting plate 40 to be controlled by the leftward or rightward horizontal pushing operation of the operating portion 32 of the adjusting lever 30 to make the airflow-blocking adjusting plate 40 performing reversely directed displacing in a rightward or leftward direction to cause each of the adjusting orifices 41 to completely or partially match with or completely un-match with a corresponding one of the airflow orifices 11 of the airflow orifice board, so that a hot airflow flowrate discharging through each of the airflow orifices 11 of the airflow orifice board 10, and discharging of the hot airflow or not, can be adjusted and controlled.
Referring to
Referring to
Further referring to
The airflow orifice adjusting device 100 of the package thermal-shrinking oven according to the present invention is shown in
| Number | Date | Country | Kind |
|---|---|---|---|
| 112204307 | May 2023 | TW | national |
