JPH0450948Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a glue heating device that heats glue used for assembling cartons, paper tubes, and making boxes to an appropriate temperature.

[Conventional technology]

To assemble and form cartons and paper tubes,
Synthetic glues such as starch glue and polyvinyl acetate emulsion are commonly used. In order to speed up assembly and box manufacturing, it is common to heat the glue to a certain extent to speed up the drying of the glue.

Conventionally, in order to heat the glue, as shown in Figure 5,
The tank 10 was filled with glue 20 and stirred by a stirrer 40 while being heated by a heater 30. Alternatively, a heater was attached to the circumferential surface of the tank to heat it, and the mixture was stirred with a stirrer, or the tank was placed in hot water, heated with hot water, and stirred with a stirrer. Furthermore, the glue cans were stored in a shed, the room temperature of the shed was raised to a predetermined temperature using a heater, and the glue was maintained at that temperature.

[The problem that the idea attempts to solve]

However, in the conventional heating method as described above, since the bottom surface or the circumferential surface of the tank 10 is heated, the temperature of the corresponding part becomes higher than the surrounding temperature, exceeding the decomposition temperature of the glue, and causing dehydration of the glue. This caused the glue to stick and accumulate in that area, impeding heat transfer and making it difficult to heat the glue efficiently. Further, since the glue sticks and accumulates, there are problems such as frequent cleaning of the tank 10 is required.

Furthermore, when humidifying in a shed, a special room is required for this purpose, and it takes a long time to heat the room to a predetermined temperature.

Therefore, the purpose of the present invention is to reduce the time required to heat the glue to a predetermined temperature by preventing glue from sticking and accumulating and improving heat transfer efficiency, even when the glue has a high viscosity. To provide a glue heating device that can easily set the temperature of glue and can continuously supply heated glue.

[Means to solve the problem]

The present invention includes an inner cylinder 11 arranged rotatably,
A plurality of scrapers 1 are arranged on the outer peripheral surface of the inner cylinder 11, equally divided in the circumferential direction and along the axial direction.
2, an outer cylinder 13 disposed surrounding the inner cylinder 11 having the scraper 12, and a glue supply device 2 that supplies glue between the scraper 12 surrounded by the outer cylinder 13.
and the outer cylinder 13 which is supplied by the glue supply device 2 and heats the glue existing between the scrapers 12.
The scraper 12 has a longitudinal dimension substantially equal to the axial dimension of the inner cylinder 11 and a rising dimension equal to the gap dimension between the inner cylinder 11 and the outer cylinder 13. The above object is achieved by providing a glue heating device which is formed with slightly smaller dimensions and is characterized in that the glue is heated by the heater and stirred via the scraper by rotation of the inner cylinder. This is what I did.

[Effect]

According to the glue heating device of the present invention, when the glue supply device starts and supplies glue between the scrapers surrounded by the outer cylinder, the rotation of the inner cylinder causes the scrapers to stick to the inner peripheral surface of the outer cylinder and tend to deposit. The glue is stirred between scrapers while being scraped off, and during this time the heater heats the glue, and the heated glue is continuously supplied via the glue supply device.

〔Example〕

The present invention will be explained below based on the embodiments shown in FIGS. 1 and 2. In the figures, FIG. 1 is a schematic side view showing one embodiment of the glue heating device of the present invention, and FIG.
1, FIG. 3 is a front view of the heating section main body, and FIG. 4 is an enlarged view of the section A in FIG. 3.

The glue heating device of this embodiment includes a heating section main body 1 that heats glue, a glue supply device 2 that supplies glue to the heating section main body 1, and a heating section main body 1 that is connected to the heating section main body 1 by the glue supply device 2.
It is configured to include a motor 3 as a drive source for stirring the glue supplied thereto. The motor 3 is connected to the heating section main body 1 and the glue supply device 2 via a speed reducer 4.

As shown in the cross section of FIG. 2, the heating section main body 1 is disposed on the inner cylinder 11 and the outer peripheral surface of the inner cylinder 11 so as to be equally divided in the circumferential direction and along the axial direction. The scraper 12 includes a plurality of scrapers 12, and an outer cylinder 13 surrounding an inner cylinder 11 having the scrapers 12. Both ends of the inner cylinder 11 are
A rotating shaft 5 passes through the center of each disc (not shown), and both ends of the rotating shaft 5 are connected to the reducer 4 and the glue supply device 2, respectively. There is. Of course, the above inner cylinder 1
The first disc is fixedly connected to the rotating shaft 5, and the inner cylinder 11 is configured to be rotatable by rotation of the rotating shaft 5. Further, a heater, in this embodiment, a band heater 14 is disposed on the outer peripheral surface of the outer cylinder 13, and is configured to heat the inside of the outer cylinder 13.

On the other hand, the glue supply device 2 is composed of, for example, a gear pump, and is driven by the driving force of a motor 3 via a reducer 4 and a rotating shaft 5, pumps up glue from a glue source (not shown), and heats it via a pipe 6. It is configured to be supplied to the section body 1.

The pipe 6 includes the above-mentioned outer cylinder 13 and inner cylinder 1.
It is connected to a cover 15 (see FIG. 3) that covers both ends of the cover 1 and seals both ends of the space formed between them, and communicates with the space. That is, a substantially arc-shaped elongated hole 15A is formed in the cover 15, and the dimension of the arc is set to be substantially equal to the dimension between the scrapers 12, 12 mentioned above. The pipe 6 is connected to the outer cylinder 13 and the inner cylinder 1 through the elongated hole 15A.
It communicates with the front ring-shaped space formed by 1 and 1. Furthermore, a connecting member 6A having an elliptical truss shape attached to the tip of the pipe 6 is connected so as to cover the elongated hole 15A, as shown in FIG. Therefore, the glue supplied through the pipe 6 flows between the scrapers 12, 12 through the connecting member 6A and the elongated hole 15A of the cover 15.

Since the inner cylinder 11 is configured to rotate in the direction indicated by the arrow in FIG. is heated to a preset temperature. Moreover, while being transferred by the scraper 12, the glue receives viscous resistance from the inner circumferential surface of the outer cylinder 13 and is stirred by convection between the scrapers 12. , 12 is uniformly heated and supplied after reaching a predetermined temperature.

The longitudinal dimension of the scraper 12 is approximately equal to the axial dimension of the inner cylinder 11 (this need only be substantially equal, and the scraper 12, which is equal in the axial direction of the inner cylinder 11, is composed of a plurality of scrapers 12. (It may extend from one end of the inner cylinder 11 to the other end as a whole), and its rising dimension is equal to that of the inner cylinder 11.
The size of the gap between the outer cylinder 13 and the outer cylinder 13 is slightly smaller than that of the outer cylinder 13. That is, the scraper 1
A clearance of 0.05 mm is formed between the tip of the band heater 14 and the inner circumferential surface of the outer tube 13 to prevent the glue heated by the band heater 14 from adhering to the inner circumferential surface of the outer tube 13 and depositing. , the above-mentioned scraper 12 is configured to scrape off the glue.

The glue heated and stirred while the inner cylinder 11 rotates is supplied to the next process via a pipe 7 connected in the same way as the pipe 6 on the opposite side of the pipe 6. There is. In addition, in FIG. 1, 8 is a shaft connecting portion.

Next, the operation of the glue heating device of this embodiment will be explained.

In the glue heating device of this embodiment, when the motor 3 is started, the motor 3 decelerates and rotates the inner cylinder 11 of the heating section main body 1 via the speed reducer 4 and the rotating shaft 5, and also starts the glue supply device 2. By starting the glue supply device 2, the glue is drawn up from the glue source and sent to the scrapers 12, 1 of the heating section main body 1 via the pipe 6.
Supply glue between the two. At this time, since the inner cylinder 11 is rotating, the glue received by the scraper 12 is stirred and heated by the heater 14 while being transferred in the direction of the arrow in FIG. The glue is continuously supplied from another pipe 7 to the next process via the glue supply device 2. During this time, the band heater 14
The glue comes into contact with the outer periphery 13 which has been heated to a high temperature, but the scraper 12 acts to scrape off the glue that is trying to adhere to the inner periphery of the outer cylinder 13, and the glue comes into contact with the inner periphery of the outer cylinder 13. This prevents deposition, always makes the heat transfer efficiency of the band heater 14 good, and together with the large heat transfer area, the heating time of the glue is shortened, and the heating temperature of the glue can be easily set.

[Effect of idea]

The glue heating device of the present invention can shorten the heating time of glue to a predetermined temperature by preventing glue from sticking and accumulating and improving heat transfer efficiency. The temperature can be easily set, and heated glue can be continuously supplied.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an embodiment of the glue heating device of the present invention, FIG. 2 is a cross-sectional view taken along the - line in FIG. 1, and FIG. 3 is a front view of the heating unit main body. FIG. 4 is an enlarged cross-sectional view of section A in FIG. 3, and FIG. 5 is a cross-sectional view showing an outline of a conventional glue heating device. 1...Heating section main body, 2...Glue supply device, 3...
Motor, 11...Inner cylinder, 12...Scraper, 1
3... Outer cylinder, 14... Heater.

Claims (1)

[Scope of utility model registration request] an inner cylinder 11 arranged rotatably;
A plurality of scrapers 12 are arranged on the outer peripheral surface of the scraper 12 equally divided in the circumferential direction and along the axial direction; an outer cylinder 13 is arranged surrounding the inner cylinder 11 having the scrapers 12; A glue supply device 2 that supplies glue between the scrapers 12 surrounded by the outer cylinder 13; and a glue supply device 2 that is provided in the outer cylinder 13 and that heats the glue that is supplied by the glue supply device 2 and exists between the scrapers 12. The scraper 12 has a longitudinal dimension approximately equal to the axial dimension of the inner cylinder 11 and a rising dimension slightly smaller than the gap dimension between the inner cylinder 11 and the outer cylinder 13. A glue heating device, characterized in that the glue is heated by the heater and stirred via the scraper by rotation of the inner cylinder.