DE102015219584B4 - Device for applying a powder - Google Patents

Abstract

Device (1) for applying a powder, in particular an adhesive, to a planar carrier material (20), having: - a housing (2) with a base area (5), - a powder storage container (10), - a carrier material support surface (13), - a conveying device which moves the carrier material (20) and - a collecting device (11) for excess powder, the carrier material support surface (13) being at an angle α (9) to the horizontal base surface (5) of the device ( 1) is arranged, wherein the following applies to α: 90°>α>10° and the powder reservoir (10) is arranged above the carrier material support surface (13); the device (1) has an ion bar (24) for discharging the carrier material (20) and a scraper (25,31,32) for excess powder, the conveying device being a belt (21) which has cams (22 ) which serve to carry along on the movement side and to define a predetermined distance between several carrier materials (20), and the carrier material support surface (13) at its lower end has a vibrating rail (23) for guiding the carrier material (20), which at the same time the carrier material (20) is made to oscillate evenly during the powder application process.

Description

• - ein Gehäuse mit einer Grundfläche,
• - einen Pulver-Vorratsbehälter,
• - eine Trägermaterial-Auflagefläche,
• - eine Fördereinrichtung, die das Trägermaterial bewegt und
• - eine Auffangvorrichtung für überschüssiges Pulver gemäß Patentanspruch 1.

The invention relates to a device for applying a powder, in particular an adhesive, to a sheet-like carrier material, comprising:

• - a housing with a base,
• - a powder storage container,
• - a carrier material support surface,
• - A conveyor that moves the carrier material and
• - an excess powder catcher according to claim 1.

In the textile transfer process, the required motif is printed in reverse on a carrier material and provided with hot-melt adhesive. This glue later ensures that the motif can be permanently transferred to a textile under heat and pressure. The adhesive, which is in powder form, is usually sprinkled into the still wet printing ink and then dried with the ink on the carrier material. The application or sprinkling of the adhesive is done mostly by hand or industrially with large, very expensive and cleaning-intensive machines.

For example, the pamphlet shows DE 24 53 746 A1 discloses a method and a device for printing fiber materials, in which the dye is applied to the web of material and a uniform distribution of the dye is made possible by means of a vibrating table, which causes the web of material to oscillate. Excess powder is removed from the web by tapping and/or suction.

From the pamphlet DE 101 01 664 A1 a method and a device for the production of flexible fabrics with grid-shaped hot-melt adhesive coating is known. Hot-melt adhesive powder is sprinkled onto the grid-shaped hot-melt adhesive coating. The powder not adhering to the paste print is then removed again. The excess powder that does not stick is sucked off and reused.

A powder suction device on printing presses, with the collecting device being funnel-shaped, is based on DE 10 2007 020 621 A1 out.

The EP 0 347 544 A2 shows a device for applying a powdery or flaky material to a substrate, with the powder being removed from a storage container and excess powder being discharged in a targeted manner via a discharge opening.

Also the EP 1 297 957 A1 discloses a device for feeding a powder onto a substrate, wherein a suction device is provided which removes excess powder.

The DE 196 48 227 A1 relates to a method or a device for dusting products, in particular printed products. In this regard, there is a powder gas dispensing nozzle assembly located in a transport gas stream having an opposite velocity component to that of the conveyor of the products to be dusted.

However, the machines known from the prior art are only designed for very high machining quantities and take up an enormous amount of space.

In the machines known from the state of the art, the ratio of energy consumption, noise, acquisition costs and benefit is also unfavorable to the benefit and functionality.

Another problem with the known machines arises when the powder is changed. Powder changes are necessary in order to achieve different washing resistances of the textiles, but with the known machines this can only be achieved with great effort.

Foil is also increasingly being used as a carrier material due to its good stability. However, this leads to increased static charging of the carrier material, so that the removal of excess powder from the carrier material becomes more difficult or impossible. However, too much or too little adhesive on the carrier material has a negative impact on the transfer result.

From the above, it is therefore the object of the invention to develop a device which minimizes the disadvantages of the prior art mentioned.

The object of the invention is achieved with a device according to the teaching of patent claim 1, the subclaims comprising appropriate configurations and developments.

• - ein Gehäuse mit einer Grundfläche,
• - einen Pulver-Vorratsbehälter,
• - eine Trägermaterial-Auflagefläche,
• - eine Fördereinrichtung, die das Trägermaterial bewegt und
• - eine Auffangvorrichtung für überschüssiges Pulver ausgegangen.

Accordingly, the starting point is a device for applying a powder, in particular an adhesive, to a carrier material, having:

• - a housing with a base,
• - a powder storage container,
• - a carrier material support surface,
• - A conveyor that moves the carrier material and
• - ran out of a catcher for excess powder.

According to the invention, the carrier material support surface is arranged at an angle α to the horizontal base surface of the device, where the following applies to α: 90°>α>10°. In addition, the powder reservoir is arranged at the upper end of the carrier material support surface.

It has proven to be particularly advantageous if the powder reservoir is arranged almost centrally above the carrier material support surface. In an exemplary embodiment of the invention, the carrier material support surface is arranged at an angle α of between 35° and 45° to the horizontal base surface of the device.

According to the invention, the device is to be provided with an ion rod. This serves to discharge the carrier material. The arrangement of the ion rod relative to the powder application container is also important. Ideally, the distance between the ion rod and the application container should be very small, so that powdering takes place directly after deionization and the carrier material cannot be recharged.

According to the invention, the device has a shaker or scraper for excess powder. The scaler is a rod or shaft that is attached to a motor that is located in the housing of the device. A slip clutch is provided between the rod and the motor so that, for example, accidental contact of a user with the scaler will result in the scaler stopping immediately. At least one knocking element is located on the rod of the knocker, which comes into contact with the carrier material when the knocker rod rotates, so that a knocking-like movement of the carrier material takes place and excess powder is removed.

The position of the scraper is also crucial for the end result. If the scraper is arranged in the direction of movement of the carrier material directly after the powder application, excess powder can be removed immediately and sticking of the powder particles together, especially on the still wet paint, can be minimized.

Since the excess powder has to be removed quickly or guided away from the carrier material, it makes sense to design the carrier material support surface in the form of a grid. Excess powder can be discharged through the openings in the grid directly into a collection container located inside the device. Of course, other configurations of the carrier material support surface are also possible without departing from the scope of the invention. For example, the supporting surface can be shaped similar to that of a sieve, with the openings of the sieve being able to assume any possible shape.

According to the invention, a vibrating rail is additionally provided at the lower end of the carrier material support surface, which further improves the removal of excess powder. Furthermore, the vibration rail can have a guide or stop so that the carrier material does not slip when the powder is applied. The guide on the vibration rail, into which the lower end of the carrier material engages, enables optimal positioning of the carrier material.

Furthermore, in an exemplary embodiment of the invention, the vibrating rail has special shapes. This means that the lower edge of the carrier material does not lie flat against the vibrating rail. Rather, openings are provided which lead the excess adhesive trickling down according to gravity through these openings directly into a collection container.

Furthermore, the carrier material support surface is provided with a conveyor. This enables the carrier material to be moved evenly during powder application.

Advantageously, the movement or the conveying speed of the carrier material is adjustable.
The conveying device is designed in the form of a belt which acts on the bearing surface.
Since the belt is provided with cams or spacers at fixed intervals, a clearly defined distance between several substrates can be guaranteed.

According to the invention, a collecting device is provided for the excess powder. This can be a removable container, for example.

Of course, excess powder can also be caught by means of the collecting device and then transported back to the application container via a transport device.

The conveying device can be a closed hose system. The collected powder can then be pumped by means of a pump be transported back to the starting point via hoses.

The small and compact design, the short distances from printing, deionization, powdering and tapping or the vibration unit lead to a particularly good result. In order for the powder to adhere well, the printing ink must still be wet on the carrier material. If the distances between printing and powder application are too long, this often leads to partial drying of the ink on the carrier material, so that complete adhesion of the adhesive cannot be guaranteed.

In an exemplary embodiment of the invention, the device is provided with a warning device which emits a signal when the powder application container is filled too low. This enables the glue powder container to be refilled immediately in order to prevent losses in the glue application on the carrier material.

It has proven to be particularly advantageous to attach the warning device at a height that is in the immediate field of vision of the machine operator, in order to draw the immediate attention of the operator in the event of a signal. The coupling with an acoustic signal also increases attention.

The invention is to be explained in more detail below on the basis of exemplary embodiments with the aid of figures.

• 1: 3D-Darstellung der Kleber-Pulver-Applikationsvorrichtung
• 2: Detail Trägermaterial-Auflagefläche mit Pulver-Applikator
• 3: Detail der Vibrationsschiene (Draufsicht)
• 4: Detail der Vibrationsschiene (Querschnitt)

Here show:

• 1 : 3D representation of the adhesive powder application device
• 2 : Detail of carrier material support surface with powder applicator
• 3 : Detail of the vibrating rail (top view)
• 4 : Detail of the vibrating rail (cross section)

1 shows an embodiment of the device 1 according to the invention.

This is a device 1 with a housing 2, a bottom or base plate 5, two side walls 4 and a rear wall 3 1 shown device 1 feet 6 on.

Without departing from the scope of the invention, the housing 2 of the device 1 according to the invention does not necessarily have to be a closed housing 2, rather it is also conceivable that the device 1 only has a base frame. Also are the in 1 illustrated feet 6 optional. It is also entirely conceivable for the device 1 to stand directly on a frame.

Furthermore, a funnel-shaped powder application container 10 is provided at the upper end 7 of the device 1 . This is at the in 1 device 1 shown attached directly to the rear wall 3 of the housing 2 and arranged centrally. Of course, the powder application container 10 can also have a different shape, in which case unnecessary corners and edges should be avoided as far as possible for easy cleaning. It is also conceivable to suspend the powder application container 10 in space above the machine 1 without having a direct connection to the device 1 .

Furthermore, in 1 the collection container 11, which is integrated in the lower part of the device 1 in the housing 2, is clearly visible. For better guidance of the excess powder, a profile sheet 12 is arranged above the collecting container 11, which guides the excess powder directly into the collecting container 11.

In 1 It is also shown that the carrier material support surface 13 is arranged at an angle o to the base surface 5 of the device 1, where the following applies to α: 90°>α>10°.

1 FIG. 1 shows, as an exemplary embodiment, the carrier material support surface 13 arranged at an angle α to the base surface 5 of the device 1, where the following applies to α: α=40°. Due to the oblique arrangement of the carrier material support surface 13, the gravity of the powder is used during application. In combination with vibration, excess powder is removed directly from the carrier material 20 without leaving any residue, so that an optimal application of the adhesive is ensured.

The machine 1 can be operated via an on/off switch 14 . Various speed levels, with which the carrier material 20 or the transfer sheet 20 is guided over the carrier material support surface 13, but also the activity of the knocker, can be selected via the speed switch 15.

To guide the carrier material 20, a guide rail is provided which runs around the carrier material support surface 13 in the form of a belt 21. This is driven by a motor, with the speed being adjustable via switch 15. In addition, the strap has 21 in 1 two cams 22 are shown as an example, which define the distance to the next carrier material 20 . For this purpose, the carrier material 20 is directly behind or located in front of the corresponding cam 22, the cams 22 serving as a limit. The two in 1 Cams 22 shown are only selected as an example, more than two cams 22 are of course also possible, and the distance between the cams 22 can be varied and adapted to the respective area of application.

Furthermore, a shaft or rod 25 , which is driven by a motor 30 , can be seen on the right-hand side of the powder application container 10 , somewhat spaced apart. On this shaft or rod 25 are in an embodiment of the invention, according to 1 or. 2 , Two knocking elements 31, 32 are arranged, which ensure that excess powder is knocked off the carrier material 20 in a targeted manner. Without departing from the scope of the invention, more or fewer tapping elements 31, 32 can also be fastened to the shaft/rod 25, and the spacing of the tapping elements 31, 32 can also be varied. In addition, the distance between the tapping elements can be selected differently when using more than two tapping elements 31,32.

For safety reasons, the shaft 25 is connected to the motor 30 with a slip clutch so that the motor 30 is stopped immediately if foreign objects get between the shaft/rod 25.

An ion rod 24 , which is used to discharge the carrier material 20 , is located on the left of the powder application container 10 . Due to the spatial proximity between the ion rod 24, powder application container 10 and scraper 31, 32, an optimal application of the adhesive to the carrier material 20 can be achieved. The short distance from the application of the carrier material 20 to the carrier material support surface 13 to the adhesive-powder application prevents premature drying of the printing ink, so that the powder can be applied to the still wet ink and optimal and very even powdering is achieved. The powder is therefore applied directly after the carrier material 20 has passed under or through the ion rod 24, so that a renewed charging of the carrier material 20 is prevented. Due to the inclined position of the carrier material 20 in connection with the tapping device 25, 31, 32, a residue-free application of the adhesive powder can take place.

In addition, a vibration rail 23 is provided at the lower end of the carrier material 20 or the carrier material support surface 13, so that the carrier material 20 is constantly vibrated evenly during the powder application process. These vibrations also cause excess powder to be removed from the carrier material 20.

In 2 the carrier material application surface 13 and the powder application container 10 are shown in detail. For example, the grid-like carrier material application surface 13 with its cross braces 33, on which the carrier material 20 is placed, is clearly visible. The cavities 34 between the cross braces 33 can also be seen; these serve to “flow off” the excess powder without coming into contact with the carrier material 20 again.

Out of 3 the vibration rail 23 can be seen in detail. This is a top view, with both the sheet guide 40 for the carrier material 20 and the formations 41 being clearly visible. The blade guide 40 prevents the carrier material 20 from slipping out or shifting forwards during the powder application and during transport over the support surface 13.

The formations 41 on the vibration rail 23 are designed in such a way that there is a sufficient distance between them so that excess powder is prevented from accumulating at the lower end of the carrier material 20 . Rather, it can be discharged through the cavities 42 between the formations 41 .

A profile sheet 12, as in 1 shown, ensures that the excess powder is guided directly into the collecting container 11. Furthermore, the distance between the protrusions 41 and their diameter or height must be selected in such a way that the carrier material 20 cannot tilt to the left or right.

Without departing from the scope of the invention, the collection container 11 can also be connected to a system which returns the excess powder directly to the powder application container 10 . It is also conceivable to return the powder directly in the application device 1 without an intermediate container 11 back to the powder application container 10 or a collection container.

4 shows the vibrating rail 23 in section. The sheet guide 40 can be seen here. The formations 41, on which the carrier material 20 comes to lie, are also in 4 recognizable.

Reference List

1

contraption

2

Housing

3

rear wall of the housing

4

side wall of the housing

5

Bottom or base plate of the housing / base area of the housing

6

feet of the device

7

top of the device

8th

lower end of the device

9

angle α

10

Powder application container / powder storage container

11

Collection container / collection device

12

profile sheet

13

Support material support surface

14

On/off switch

15

speed switch

20

Carrier material / transfer sheet

21

conveyor/belt

22

cam

23

vibrating rail

24

ion rod

25

Wave of the Knocker

30

Engine of the skinner

31

knocker a

32

knocker b

33

Cross bracing of the carrier material support surface

34

Carrier support surface cavity

40

sheet guide

41

molding

42

cavity

Claims (4)

Device (1) for applying a powder, in particular an adhesive, to a sheet-like carrier material (20), having: - a housing (2) with a base (5), - a powder reservoir (10), - a carrier material support surface (13), - A conveyor that moves the carrier material (20) and - A collecting device (11) for excess powder, the carrier material support surface (13) being arranged at an angle α (9) to the horizontal base surface (5) of the device (1), where the following applies for α: 90°>α>10 ° and the powder reservoir (10) is arranged above the carrier material support surface (13); the device (1) has an ion bar (24) for discharging the carrier material (20) and a scraper (25,31,32) for excess powder, the conveying device being a belt (21) which has cams (22 ) which serve to carry along on the movement side and to define a predetermined distance between several carrier materials (20), and the carrier material support surface (13) at its lower end has a vibrating rail (23) for guiding the carrier material (20), which at the same time the carrier material (20) is made to oscillate evenly during the powder application process. device after claim 1 , characterized in that the carrier material support surface (13) is arranged at an angle (9) of between 35° and 45° to the horizontal base surface (5) of the device (1). Device according to one of the preceding claims, characterized in that the collecting device (11) is a container. device after claim 3 , characterized in that the powder collecting device (11) is a system which returns excess powder to the reservoir (10).

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