TWI643758B - Ink scraping device and applied screen printing machine - Google Patents

Abstract

The ink removing device of the screen printing machine of the present invention has an ink containing tray for containing ink and a deinking knife assembled to the ink containing tray, and the ink removing knife is driven by the driving device to be moved by an initial position which is not in contact with the screen. When the ink removing knife is in the ink wiping position, when the ink removing knife is located at the ink wiping position, both the ink removing knife and the ink collecting tray are simultaneously driven by the lower moving mechanism to linearly move under the screen, so that the screen is in the screen. The ink can flow along the ink removing knife to the inside of the ink tray, whereby the lower moving mechanism moves the ink removing knife and the ink tray to the least point of the screen at the same time, and then remains on the screen. The ink at the bottom is scraped off, and it can ensure that the ink scraped from the screen can flow into the ink tray, which can effectively prevent the ink from dripping on the machine table, or avoid the residual ink from spreading to the printing. Around the screen, to prevent contamination to the next part of the work to be printed.

Description

Deinking device of screen printing machine and screen printing machine thereof

The invention relates to a squeegee device and a screen printing machine which are used in a printing operation, in particular to scrape ink remaining in a screen to prevent ink from dripping on the machine table or preventing contamination of the workpiece. Device and screen printing machine.

In a typical screen printing operation, the screen printing machine applies ink to the screen through the upper doctor blade of the upper blade device, so that the workpiece can be printed on the screen, so that the workpiece can be printed with a pattern.

However, when the upper scraper applies the ink to the screen, the ink is pressed by the upper scraper and penetrates under the screen, so that the residual ink spreads to the side of the screen during printing, thereby causing the workpiece to be followed. During the printing operation, the residual ink will contaminate the workpiece to be printed next, and the indirect residual ink will affect the pattern of the workpiece, whereby the residual ink will result in reduced print quality and precision of the workpiece, and reduced productivity. Moreover, the residual ink is more likely to drip on the screen printing machine, which in turn affects the operation of the screen printing machine, which may cause damage to the screen printing machine, thereby increasing production costs.

In addition, in order to prevent the ink from remaining on the screen, the ink remaining on the screen is manually removed, but the manual removal of the ink is not only time-consuming and laborious, but also the cleanness of the screen is different depending on the operation mode of the person. There are different results, which in turn makes the print quality of the work piece less than a certain quality.

The main object of the present invention is to enable the ink remaining on the screen to be scraped, and to directly collect the ink scraped from the screen to avoid residual diffusion and contaminate the workpiece to be printed next, thereby enabling Stabilize the print quality of the work piece.

The secondary objective of the present invention is that the ink removing knife can change the relative position with the screen before the ink squeegeing operation, so that the ink removing knife can be closely attached to the screen, thereby facilitating the ink removing knife to remain on the screen. The ink is used for squeegeeing.

In order to achieve the foregoing object, the present invention relates to an ink removing device for a screen printing machine. The ink removing device is used in combination with an upper scraping mechanism, and the upper scraping mechanism is driven by an upper moving mechanism to move over a screen. And the ink removing device is driven by a lower moving mechanism to enable the ink removing device to linearly move under the screen, wherein the ink removing device is mainly composed of a liquid removing blade mechanism and The drive mechanism is constituted by a lower ink squeegee mechanism having an ink containing tray capable of accommodating ink and a deinking knives assembled to the ink containing tray.

The lower driving mechanism has a lifting mechanism, a swinging mechanism and an adjusting mechanism. The swinging mechanism and the adjusting mechanism are assembled to the lifting mechanism. In a preferred embodiment, the swinging mechanism is pivotally connected to the ink removing knife mechanism. And having a connecting body connected to the ink removing blade mechanism and a swing driving source, wherein the connecting seat is provided with a swinging rod connected to the swinging driving source and a sliding block connected to the swinging rod.

The adjusting mechanism has a moving member capable of driving the ink removing blade mechanism to move up and down, and a rotating member spirally fitted to the moving member, and the moving member is provided with a restricting groove through which the sliding block is disposed, and When the rotating member performs the rotating motion, since the moving member and the rotating member are screwed together, the rotating motion can be converted into a linear motion, so that the moving member can be displaced up and down. Further, in a case where the lifting mechanism does not drive the movement of the ink removing blade, the adjusting mechanism can individually change the relative position between the ink removing blade and the screen.

Further, the lifting mechanism can longitudinally move the ink removing blade from an initial position not contacting the screen to a preliminary position higher than the initial position, and the swinging mechanism can prepare the ink removing knife from the preparation The position is swung to a wiping position contacting the screen, so that the ink removing blade mechanism can swing relative to the adjusting mechanism, and then the lower moving mechanism drives the ink removing blade mechanism to extend along a lateral direction of the screen. Moving in a direction such that excess ink at the bottom of the screen is in contact with the ink removing blade and flows to the inside of the ink containing tray, wherein the swinging amplitude of the ink removing blade between the preparatory position and the ink wiping position is limited by The above restriction groove.

In this embodiment, the swinging lever is driven away from the swing driving source by the swing driving source, so that the ink removing blade can be swung from the ink wiping position to the preparatory position, and when the ink removing blade is located in the scraping blade In the ink position, the sliding block moves to the end of the restricting groove, and when the swinging mechanism is assembled to the lifting mechanism, the lifting mechanism moves the ink removing blade from the initial position to the preparatory position, The swing mechanism moves synchronously.

The invention is characterized in that when the ink removing knife is driven by the lower driving mechanism to move to the ink wiping position, the lower moving mechanism can simultaneously drive both the ink removing knife and the ink loading tray to move linearly under the screen, so that the ink removing knife can The ink remaining on the screen is scraped, so that the ink on the screen flows along the ink removing knife to the inside of the ink tray, so that the ink scraped from the screen can be prevented from dripping on the machine. Or avoid the ink blocking the hole of the screen, thereby effectively stabilizing the printing quality of the workpiece and reducing the chance of damage to the screen printer, or avoiding the residual ink lying under the screen to spread around the screen to prevent residue. The ink is contaminated to the workpiece to be printed next, so that the pattern of the workpiece is not affected by the residual ink, thereby preventing the occurrence of defective products.

In addition, the adjusting mechanism can change the relative position between the ink removing knife and the screen of the ink removing knife mechanism before the shaving operation, so that the ink removing knife and the screen can be closely fitted, so that the ink removing knife will remain in the residue. The screen printing ink is used for squeegeeing.

1‧‧‧Deinking device

10‧‧‧ Screen Printing Machine

11‧‧‧Upper scraper mechanism

111‧‧‧Upper scraper

112‧‧‧Returning knife

12‧‧‧Uplifting agency

13‧‧‧ Screen

14‧‧‧Upper moving agency

15‧‧‧Upper drive mechanism

16‧‧‧Mobile agencies

20‧‧‧Ink remover mechanism

21‧‧‧Ink tray

22‧‧‧Ink remover

30‧‧‧Lower drive mechanism

31‧‧‧ Lifting mechanism

311‧‧‧ Lifting drive source

312‧‧‧lifting telescopic parts

313‧‧‧Fixed block

32‧‧‧swing mechanism

321‧‧‧Swing drive source

322‧‧‧Swing expansion joint

323‧‧‧Connecting Block

324‧‧‧ pivot rod

325‧‧‧swing rod

326‧‧‧Slip block

33‧‧‧Adjustment agency

331‧‧‧Mobile parts

332‧‧‧Rotating parts

333‧‧‧Restricted slot

333a‧‧‧ first end

333b‧‧‧ second end

34‧‧‧Group board

P1‧‧‧ initial position

P2‧‧‧prepared position

P3‧‧‧ scraping position

1 is a schematic view showing the ink removing device of the screen printing machine of the present invention assembled on a screen printing machine; FIG. 2 is a perspective view of the ink removing device of the screen printing machine of the present invention; FIG. 3 is an exploded view of the ink removing device of the screen printing machine of the present invention; Figure 4 is a schematic view of the upper scraper mechanism driven by both the upper drive mechanism and the upper moving mechanism; Figure 5 is a schematic view of the ink removal knife in an initial position; Figure 6 is a schematic view of the ink removal knife in a preparatory position; FIG. 8 is a schematic view showing the lower moving mechanism driving the deinking device to move; FIG. 9 is a schematic view showing the ink removing blade being swung from the wiping position to the preparatory position; FIG. 10 is a view showing the ink removing knife moving from the preparatory position; A schematic view to the initial position; and Figure 11 is a schematic view of the adjustment mechanism changing the relative distance between the deinking mechanism and the ground.

In order to further clarify and understand the structure, the use and the features of the present invention, the preferred embodiment is described in detail with reference to the following drawings:

Referring to FIG. 1 , the ink removing device 1 of the screen printing machine of the present invention is assembled into a screen printing machine 10 having a printing body (not shown) and a printing body (not shown). The upper upper scraper mechanism 11 is assembled on a screen above the printing body (not shown) via a lifting mechanism 12 13. The screen 13 can be raised or lowered along the Z axis by the lifting mechanism 12, and the upper blade mechanism 11 is assembled to the lifting mechanism 12 through an upper moving mechanism 14 and an upper driving mechanism 15, wherein The screen 13 is located below the upper blade mechanism 11, and has a lower moving mechanism 16 mounted on the top surface of the printing body (not shown) below the screen 13.

As shown in the figure, the upper scraper mechanism 11 has an upper scraper blade 111 and an ink returning blade 112 on the side of the upper scraper blade 111, and the upper moving mechanism 14 can drive the upper scraper mechanism 11 to actuate the upper scraper. Both the 111 and the ink repelling blade 112 can move left and right along the Y axis above the screen 13, and the upper driving mechanism 15 can move the upper blade mechanism 11 up and down along the Z axis, so that the upper blade 111 Both the ink repelling knife 112 can be accessed or moved away from the screen 13 described above.

Referring to FIG. 2, the ink removing device 1 is assembled above the top surface of a printing body (not shown) of the screen printing machine 10 via the lower moving mechanism 16, and the ink removing device 1 is located on the screen 13 In the following, the above-described ink removing device 1 is mainly composed of an ink removing blade mechanism 20 and a lower driving mechanism 30.

Referring to FIG. 3, the above-described ink removing blade mechanism 20 has an ink containing tray 21 and a deinking blade 22 connected to the inside of the ink containing tray 21.

The lower drive mechanism 30 is mainly composed of a lifting mechanism 31, a swinging mechanism 32 and an adjusting mechanism 33. The lifting mechanism 31 has a lifting drive source 311 assembled to the lower moving mechanism 16 and a lifting and lowering member 312 attached to the lifting drive source 311, and the lifting and lowering member 312 is provided with a fixing block 313. The set of plates 34 is connected to the adjustment mechanism 33, and the swing mechanism 32 is pivotally coupled to the adjustment mechanism 33 such that the swing mechanism 32 is coupled to the lift mechanism 31 via the adjustment mechanism 33.

In this embodiment, the swing mechanism 32 has a swing drive source 321 fixedly coupled to the assembly plate 34, a swing telescopic member 322 assembled to the swing drive source 321, and a laterally disposed connection along the Y-axis. a 323, the above-mentioned connecting seat 323 can be selectively assembled or removed from the ink tray 21 of the ink removing blade mechanism 20, and a pivoting rod 324 and a side of the pivoting rod 324 are respectively disposed at opposite ends of the left and right sides. The swinging rod 325, and the end of the swinging rod 325 has a sliding block 326 having a circular shape, wherein the end of the swinging stretchable member 322 is connected to the swinging rod 325, and the adjusting mechanism 33 has a mutual spiral a moving member 331 and a rotating member 332 are movably assembled to the fixing block 313 of the lower driving mechanism 30 by the assembly of the sliding rail, and the rotating member 332 is connected to the connecting plate. 34, wherein the moving member 331 is recessed to form a restricting groove 333 for the sliding block 326, and is pivotally connected to the pivoting rod 324 of the swinging mechanism 32, and the two ends of the restricting groove 333 form a first End 333a and Position higher than the height of said first end 333a of the second end 333b.

Referring to FIG. 4, in the specific application, the upper driving mechanism 15 drives the upper scraper mechanism 11 to move down along the Z-axis, so that the upper scraper 111 and the ink returning blade 112 of the upper scraper mechanism 11 are close to the net. The plate 13 is then moved by the lower moving mechanism 16 to move left and right along the Y axis so that the upper blade 111 and the ink returning blade 112 apply ink to the screen 13.

Referring to FIG. 5 and FIG. 6, when the lifting/lowering driving source 311 of the lifting mechanism 31 does not drive the elevating/lowering member 312 of the elevating mechanism 31 to extend in the Z-axis direction, the deinking blade 22 of the deinking blade mechanism 20 is located. When the upper blade 111 and the ink repelting blade 112 apply ink to the screen plate 13 when the upper blade 111 and the ink repelting blade 112 apply ink to the screen plate 13, the lifting and lowering driving source 311 drives the lifting and lowering member 312 along the Z axis. Extending upwardly, the ink removing blade 22 is moved from the initial position P1 to a preliminary position P2 at a height position higher than the initial position P1, wherein the swinging mechanism 32 and the adjusting mechanism 33 are assembled to the lifting and lowering member 312, When the above-described ink removing blade 22 is longitudinally moved to the above-described preparatory position P2, Both the swinging mechanism 32 and the adjusting mechanism 33 are moved by the lifting and lowering member 312 to move in the Z-axis direction.

Referring to FIG. 6 and FIG. 7, when the ink removing blade 22 of the ink removing blade mechanism 20 is at the preliminary position P2, the swing driving source 321 of the swinging mechanism 32 drives the swinging and expanding member 322 along the Z axis. When the oscillating weight 322 is assembled to the swinging lever 325, the swinging lever 325 is gradually brought closer to the oscillating driving source 321 , and the sliding block 326 is driven by the swinging lever 325 to be supported by the restricting groove 333. The second end 333b is moved to the first end 333a of the limiting groove 333, whereby when the sliding block 326 is located at the first end 333a, the connecting mechanism 323 of the swinging mechanism 30 is pivoted by the pivoting rod 324 The swinging is performed such that the ink removing blade 22 of the above-described ink removing blade mechanism 20 is swung from the preliminary position P2 to a wiping position P3 contacting the lower portion of the screen plate 13, and the swinging amplitude of the above-described ink removing blade 22 is limited to the above. The length of the groove 333 is limited.

Referring to FIG. 8, the lower moving mechanism 16 can drive the ink removing blade mechanism 20 along the X axis below the screen 13 when the ink removing blade 22 is located at the ink wiping position P3. The front movement is performed such that both the above-described ink removing blade 22 and the ink containing tray 21 are simultaneously laterally moved from the rear side of the screen 13 to the front side of the screen 13, and the above-described ink removing blade 22 can position the upper blade mechanism 11 at The ink under the screen 13 is subjected to a squeegee operation, and when the squeegee 22 performs the squeegee operation, the ink contacts the ink eliminator 22 and flows to the inside of the ink tray 21 so that the ink does not drip. In the above-mentioned screen printing machine 10, the above-mentioned screen printing machine 10 can be prevented from being damaged, wherein the residual ink located under the screen 13 can be prevented from diffusing to the side of the side of the screen board 13, thereby preventing pollution to the next step. The printing work piece is printed so that the pattern of the work piece is not affected by the residual ink, and thus the defective product is not generated, so that the printing quality can be stabilized.

Referring to FIG. 9 and FIG. 10, when the ink removing blade 22 of the ink removing blade mechanism 20 is moved by the lower moving mechanism 16 and moved to the front side of the screen 13, the ink removing blade 22 can complete the ink wiping. After the swing driving source 321 of the swinging mechanism 32 drives the swinging expansion/contraction member 322 of the swinging mechanism 32 to extend in the Z-axis direction, the swinging lever 325 is gradually moved away from the swinging driving source 321 of the swinging mechanism 32, and further The sliding block 326 is moved from the first end 333a of the restricting groove 333 to the second end 333b, whereby the ink removing blade 22 of the ink removing blade mechanism 20 can be swung from the above-described ink wiping position P3 to the above preparation. The position P2 is such that the above-described ink removing blade 22 does not come into contact with the bottom side of the screen plate 13.

Next, the lower moving mechanism 16 drives the ink removing blade mechanism 20 to move from the front side of the screen plate 13 along the X axis to the rear side of the screen plate 13, and the lifting drive source 311 of the lifting mechanism 31 drives the lifting and lowering. The stretchable member 312 is contracted downward along the Z-axis to longitudinally move the above-described ink-removing blade 22 from the preliminary position P2 to the initial position P1, whereby the above-described ink-removing blade mechanism 20 is ready for the next ink-scraping operation.

Referring to FIG. 11, before the ink removing blade 22 of the ink removing blade mechanism 20 is intended to perform the ink wiping operation, the relative position (levelness) between the screen plate 13 and the screen plate 13 can be changed through the adjusting mechanism 33, so that the above The ink removing blade 22 of the ink removing blade mechanism 20 and the screen plate 13 can be closely adhered to each other, so that the ink removing blade 22 can perform the ink wiping operation on the screen plate 13, so that the printing quality can be improved. In the example, the moving member 331 is screw-fitted to the rotating member 332, so that the rotating member 332 can rotate the rotary motion into a linear motion when the Z-axis is rotated clockwise, thereby causing the moving member 331 to undergo the above-mentioned rotation. The member 332 is displaced along the Z-axis to adjust the level between the ink-removing blade mechanism 20 and the screen 13.

The above embodiments are intended to be illustrative only, and are not intended to limit the scope of the present invention. It is included in the scope of the following patent application.

Claims (10)

The ink removing device of the screen printing machine is driven by a moving mechanism to move under a screen. The ink removing device comprises: an ink removing knife mechanism, having an ink tray capable of accommodating ink and an assembly a deinking knife for the ink tray; and a lower driving mechanism assembled to the ink removing knife mechanism, and capable of driving the ink removing knife to move from an initial position not contacting the screen to a contact with the screen The squeegeing position, wherein the lower driving mechanism comprises: a lifting mechanism capable of moving the ink removing blade between the initial position and the squeegeing position; and an adjusting mechanism assembled to the ink removing blade mechanism, and The relative position between the ink removing blade and the screen can be separately changed when the lifting mechanism is not driven by the lifting mechanism, wherein the adjusting mechanism comprises: a moving member capable of driving the ink removing knife mechanism Moving up and down; and a rotating member, the screw is screwed to the moving member, and when the rotating member rotates, the moving member and the rotating member can be screwed together The rotary motion is converted into a linear motion, so that the moving member can be displaced up and down; wherein, when the ink removing blade is located at the ink wiping position, the lower moving mechanism can drive the ink removing blade mechanism along a lateral extending direction of the screen The movement is performed such that excess ink at the bottom of the screen is brought into contact with the above-described deinking knife and flows to the inside of the ink tray. The ink removing device of the screen printing machine according to Item 1, wherein the lower driving mechanism has a lifting mechanism and a swinging mechanism, and the lifting mechanism can longitudinally move the ink removing blade from the initial position to a height. The position is higher than the preparatory position of the initial position, and the swinging mechanism is capable of swinging the ink removing blade from the preparatory position to the wiping position. The ink removing device of the screen printing machine according to the second aspect of the invention, wherein the swinging mechanism is assembled to the lifting mechanism, and the swinging mechanism drives the ink removing blade to move to the preparatory position from the initial position, the swinging The organization moves simultaneously. The ink removing device of the screen printing machine according to the second aspect of the invention, wherein the swinging mechanism is provided with a sliding block, and the sliding block is disposed through a limiting groove formed in the lower driving mechanism, so that the limiting groove The method is for limiting the amplitude of the swing of the ink removing blade from the preliminary position to the ink wiping position. The ink removing device of the screen printing machine according to the fourth aspect of the invention, wherein the ink removing blade is located at the ink wiping position when the sliding block moves to an end of the restricting groove. The ink removing device of the screen printing machine according to the second aspect of the invention, wherein the swinging mechanism has a connecting body connected to the ink removing blade mechanism and a swing driving source, wherein the connecting seat is provided with a connection to the swing driving source. The swinging lever is driven by the swing driving source so that the ink removing blade can swing from the ink wiping position to the preparatory position. A screen printing machine comprising: a screen plate; an upper blade mechanism movable by an upper moving mechanism above the mesh plate; an ink removing knife mechanism located below the screen plate and having an ink capable of accommodating An ink cartridge and a deinking knife assembled to the ink tray; and a lower driving mechanism assembled to the ink removing blade mechanism and capable of driving the ink removing blade to move from an initial position not contacting the screen to a contact position of the screen, wherein the lower driving mechanism comprises: a lifting mechanism capable of moving the ink removing blade between the initial position and the ink wiping position; An adjusting mechanism assembled to the ink removing blade mechanism and capable of separately changing a relative position between the ink removing blade and the screen when the lifting mechanism does not move the ink removing blade, wherein the adjusting mechanism The utility model comprises: a moving member capable of driving the above-mentioned ink removing knife mechanism to move up and down; and a rotating member screwed to the moving member, wherein when the rotating member rotates, the moving member and the rotating member can be screwed together Converting the rotary motion into a linear motion, so that the moving member can be displaced up and down; wherein, when the ink removing blade is located at the scraping position, the ink removing knife mechanism is driven by a lower moving mechanism below the screen The lateral extension direction of the screen is moved such that excess ink at the bottom of the screen contacts the ink removal knife and flows to the inside of the ink tray. The screen printing machine of claim 7, wherein the lower driving mechanism has a lifting mechanism and a swinging mechanism, and the lifting mechanism can longitudinally move the ink removing blade from the initial position to a height position higher than the above The preliminary position of the initial position, and the swinging mechanism is capable of swinging the ink removing blade from the preparatory position to the ink wiping position. The screen printing machine according to claim 8, wherein the swinging mechanism is assembled to the lifting mechanism, and the swinging mechanism is synchronized when the lifting mechanism moves the ink removing blade from the initial position to the preparatory position. mobile. The screen printing machine of claim 8, wherein the swinging mechanism has a connecting rod connected to the ink removing blade mechanism and a swing driving source, and the connecting seat is provided with a swinging rod connected to the swing driving source. The oscillating lever is driven by the oscillating driving source so that the squeegee can be swung from the squeegee position to the preparatory position.