TWI604897B - Closed circular blade for plastic device - Google Patents

Description

Closed circular scraper glue supply device

The invention relates to a glue supply device, in particular to a closed circular blade glue supply device.

Referring to FIG. 1 , there is a conventional glue supply device 1 suitable for a coating machine (not shown). The glue supply device 1 includes a back wheel 11 , a scraper 12 spaced from the back wheel 11 , and A glue tank 13 disposed under the back wheel 11 and the scraper 12 and storing a compound 14.

The glue supply device 1 is operated by winding an object 15 onto the back wheel 11 and controlling the rotation of the back wheel 11 to drive the object 15 to apply the glue 14 and form The gap 16 between the back wheel 11 and the blade 12 scrapes off the excess glue 14 on the surface of the object 15 to maintain a uniform coating thickness.

However, since the rubber tank 13 communicates with the outside air, the rubber 14 in the rubber tank 13 is easily evaporated and undergoes a qualitative change after being applied to the air, thereby affecting the coating quality of the coated material 15. If the compound 14 is mixed with air bubbles and applied to the object 15 to be coated, the problem of uneven coating may occur, and if it is applied to a delicate product (such as a sticker of a mobile phone screen), any fineness is applied. The bubbles may significantly reduce the aesthetics of the product. In addition, the impurities generated during the coating process may wear the scrape for a long time. The knife 12, and the replacement of the blade 12 by the worker takes a lot of time, which in turn affects work efficiency.

Accordingly, it is an object of the present invention to provide a closed circular blade supply device that enhances work efficiency and coating quality.

Therefore, the closed circular scraper glue supply device of the present invention comprises a back wheel, a scraper unit spaced apart from the back wheel, and a glue supply unit disposed under the back wheel and the scraper unit.

The doctor unit includes a doctor body rotatable about its own axis, and a plurality of blades spaced apart from the blade body. A gap is formed between the back wheel and the doctor unit for passing an object.

The glue supply unit includes a rubber tank wall that cooperates with the doctor unit to define a rubber tank. When the object passes through the gap, outside air cannot enter the rubber tank.

The utility model has the advantages that: by providing the scraper unit, when one of the blades is worn, the scraper body can be rotated to immediately use other blades to continue the coating operation, thereby improving work efficiency and utilizing the height of the rubber tank The airtightness prevents the outside air from entering the rubber tank during the coating operation, thereby improving the coating quality.

2‧‧‧Back wheel

3‧‧‧ scraper unit

31‧‧‧ scraper body

32‧‧‧blade

33‧‧‧Fixed components

34‧‧‧ Connecting ribs

35‧‧‧ gap

4‧‧‧Glue unit

41‧‧‧Material tank wall

42‧‧‧Glue trough

421‧‧‧Glue area

422‧‧‧Dose area

43‧‧‧Inlet

44‧‧‧Storage bucket

45‧‧‧Glue pump

5‧‧‧shims

6‧‧‧vacuum unit

61‧‧‧vacuum wall

62‧‧‧Exhaust port

63‧‧‧vacuum pump

64‧‧‧ chamber

8‧‧‧Stained objects

9‧‧‧Material

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a schematic view illustrating a conventional glue supply device; Figure 2 is a schematic view showing an embodiment of the closed circular blade supply device of the present invention; and Figure 3 is a partially enlarged cross-sectional view showing a glue supply zone and a dose zone of the embodiment.

Referring to FIG. 2 and FIG. 3, an embodiment of the closed circular blade glue supply device of the present invention comprises a back wheel 2, a doctor unit 3, a glue supply unit 4, a gasket 5 and a vacuum unit 6.

The scraper unit 3 is spaced apart from the back wheel 2 and includes a scraper body 31 rotatable about its own axis, three blades 32 spaced apart from the scraper body 31, and three respectively securing the blades 32 to the scraper The fixing member 33 of the body 31 and the three connecting ribs 34 are spaced apart from the blade body 31.

A gap 35 is formed between the back wheel 2 and the doctor unit 3 through which an object 8 can pass. One end of each of the connecting ribs 34 is connected to one of the blades 32 to enhance the stability of the blades 32 during the coating operation. In the present embodiment, the fixing members 33 are bolts.

The glue supply unit 4 is disposed under the back wheel 2 and the doctor unit 3, and includes a rubber groove wall 41 defining a rubber groove 42 in cooperation with the blade unit 3, and a glue groove wall 41 formed in the rubber groove The wall 41 is connected to the glue inlet 43 of the rubber tank 42 , a plastic storage tank 44 for storing a rubber 9 , and a rubber supply pump 45 for connecting the rubber inlet 43 and the plastic storage tank 44 respectively. .

The rubber tank 42 has a glue supply area 421 communicating with the glue inlet 43 and a dose area 422 communicating with the glue supply area 421 and the gap 35, and The dose zone 422 has a much smaller volume than the glue supply zone 421.

The gasket 5 is disposed between the back wheel 2 and the doctor unit 3, and one end abuts against the rubber tank wall 41. The gasket 5, the compound tank wall 41 and the doctor unit 3 cooperate to define the dose zone 422.

The user can adjust the volume of the dose area 422 by changing the size of the spacer 5 to control the amount of the rubber material 9 entering the dose area 422 from the glue supply area 421, thereby improving the coating precision.

In this embodiment, the material of the gasket 5 is rubber. The user can select hard rubber or soft rubber according to requirements. However, the important technical features of the present invention are not described herein.

The vacuum unit 6 includes a vacuum chamber wall 61 disposed below the back wheel 2 and adjacent to the rubber tank wall 41, a suction port 62 formed in the vacuum chamber wall 61, and a connection port 62. Vacuum pump 63. The vacuum chamber wall 61 cooperates with the back wheel 2 to define a chamber 64.

In actual operation, the vacuum pump 63 is activated to evacuate the chamber 64 to bring the chamber 64 close to a vacuum state, and at the same time, the glue supply pump 45 is activated, and the rubber material in the glue storage tank 44 is 9 The rubber supply zone 421 is conveyed to the rubber tank 42 and the amount of the rubber 9 delivered from the rubber supply zone 421 to the dosage zone 422 is adjusted through the gasket 5 to determine that the rubber 9 is applied to the rubber material. The thickness of the object to be coated 8 is further rotated by rotating the back wheel 2 to cause the object 8 to pass through the chamber 64 to remove air bubbles adhering to the surface of the object 8 to be coated. The article 8 is passed through the dose zone 422, at which point the compound 9 can be uniformly applied to the surface of the article 8.

In addition, during the coating process, long-term down, if When a blade 32 is worn, the user only needs to rotate the blade body 31 to rotate the other blades 32 to the corresponding position adjacent to the dose zone 422, so that the coating operation can be continued without having to replace it as conventionally known. A new set of scrapers 12 (see Figure 1) saves a lot of work time and increases staff productivity.

Through the above description, the advantages of the present invention can be summarized as follows:

1. By the high airtightness of the rubber tank 42, the outside air cannot enter the rubber tank 42 during the coating operation, so that the rubber material 9 is not easy to evaporate and does not deteriorate due to contact with the air, thereby achieving improvement. The effect of coating quality.

2. By virtue of the fact that the blades 32 can rotate with the blade body 31, when one of the blades 32 is worn, the worker only needs to rotate the blades 32 to continue the coating operation, thereby improving work efficiency.

3. By setting the spacer 5, the volume of the dose region 422 is adjusted, thereby controlling the coating thickness of the rubber 9 to achieve the effect of improving coating precision.

4. By the arrangement of the vacuum unit 6, before the object 8 passes through the dose area 422, the air bubbles adhering to the surface of the object 8 are removed to improve the coating quality of the material 9 and thereby reduce The defect rate of the product.

It is worth mentioning that if the object 8 is not a delicate product (such as a sticker of a mobile phone screen), the glue 9 on the surface of the object 8 is mixed with some bubbles during the coating operation. Still not affecting its beauty To the extent that the vacuum unit 6 is not provided, the present invention can also achieve its main inventive effects, depending on the product requirements of the manufacturer.

As described above, the present invention achieves the object of the present invention by improving the work efficiency and coating quality by the rotatability of the doctor unit 3 and the high airtightness of the rubber tank 42.

However, the above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and the patent specification of the present invention are still It is within the scope of the patent of the present invention.

2‧‧‧Back wheel

3‧‧‧ scraper unit

31‧‧‧ scraper body

32‧‧‧blade

33‧‧‧Fixed components

34‧‧‧ Connecting ribs

4‧‧‧Glue unit

41‧‧‧Material tank wall

42‧‧‧Glue trough

421‧‧‧Glue area

422‧‧‧Dose area

43‧‧‧Inlet

44‧‧‧Storage bucket

45‧‧‧Glue pump

5‧‧‧shims

6‧‧‧vacuum unit

61‧‧‧vacuum wall

62‧‧‧Exhaust port

63‧‧‧vacuum pump

64‧‧‧ chamber

8‧‧‧Stained objects

9‧‧‧Material

Claims (8)

A closed circular scraper glue supply device comprises: a back wheel; a scraper unit spaced apart from the back wheel and comprising a scraper body rotatable about its own axis and a plurality of blades spaced apart from the scraper body A gap is formed between the back wheel and the scraper unit for passing an object; and a glue supply unit is disposed under the back wheel and the scraper unit, and includes a matching with the scraper unit a rubber tank wall of a rubber tank, when the object passes through the gap, the outside air cannot enter the rubber tank; wherein the scraper unit further comprises a plurality of fixings respectively fixing the blades to the scraper body The squeegee unit further includes a plurality of connecting ribs spaced apart from the blade body, and two ends of each connecting rib are respectively connected to one of the blades. The sealed circular scraper glue supply device of claim 1, wherein the rubber tank has a glue supply zone and a dose zone connecting the glue supply zone and the gap, the volume of the dose zone being much smaller than the supply zone. Glue area. The sealed circular blade supply device of claim 2, wherein the glue supply unit further comprises a glue inlet formed in the rubber tank wall and communicating with the glue supply area, and a storage of a rubber compound. The glue barrel and one end are respectively connected to the glue inlet and the glue pump of the glue barrel. The closed circular blade glue supply device according to claim 2 or 3, further comprising: disposed between the back wheel and the scraper unit and having one end abutting The gasket of the wall of the rubber tank, the gasket, the wall of the rubber tank and the body of the scraper cooperate to define the dosage zone. The closed circular blade glue supply device of claim 1, further comprising a vacuum unit, the vacuum unit comprising a vacuum groove wall disposed adjacent to the back wheel and adjacent to the rubber groove wall and forming At the suction port of the vacuum tank wall, the vacuum groove wall cooperates with the back wheel to define a chamber. The closed circular blade supply device of claim 5, wherein the vacuum unit further comprises a vacuum pump connected to the suction port. The closed circular blade supply device of claim 1, wherein the fixing members are bolts. The sealed circular blade supply device according to claim 4, wherein the gasket is made of rubber.