JPH04269545A - Screen printing machine - Google Patents

Abstract

PURPOSE:To replace a step with good workability without requiring skilled work by preparing a plurality of collective replacing plates for external set-up and support pins. CONSTITUTION:At least one more collective replacing plate 18 for external set-up is prepared other than the one mounted on a screen printing machine and, during printing, the position of the support pins of an object to be printed next is preliminarily arranged. When the outer shape dimension of the object 21 to be printed is altered, a moving stage 25b wherein a rail 33 is mounted on a movable slider 34 is moved so as to be matched with the outer shape dimension of the object 21 to be printed and the collective replacing plate 18 for external set-up prepared so as to be matched with the size of the object 21 to be printed is mounted on a stage 29 by fitting positioning insertion pins 30a, 30b in said plate 18. When the thickness of the object 21 to be printed is altered, the upper limit of a cylinder apparatus moving the stage up and down is adjusted by nuts 37a, 37b.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a screen printing machine for printing pastes such as cream solder and pastes for forming thick film circuits onto substrates for forming circuits of electronic components with high precision.

0002

[Prior Art] In recent years, with the miniaturization of electronic devices, electronic component mounting boards have become increasingly finer, and in response to this, various improvements have been made to screen printers to print with high precision. However, while pursuing printing accuracy, there is a demand for screen printing machines with short setup change times and good workability.

[0003] A conventional screen printing machine will be explained below with reference to the drawings. First, a conventional example shown in FIG. 2 will be described. A printing medium 2 transported by a transport link 1 is fixed on the upper surface of a positioning stage 3, and the positioning stage 3 is raised by driving a cylinder device 4 that moves up and down. At the same time, the protection plate 5 is also pushed up by the push rod 6, and the upper surface of the printing material 2 and the protection plate 5 is pushed up to the screen 7.
The screen is printed in a raised position near the bottom surface of the screen. In order to fix the printing material 2 placed on the positioning stage 3, a method is used in which, for example, a negative pressure suction means is used to suck and fix the printing material.

Next, another conventional example shown in FIG. 3 will be explained. A printing medium 11 is held by a support pin 10 inserted into an insertion hole 9 of a stage 8, and a rotating roller 13 is moved by a horizontally moving cylinder device 12. By pressing against the outer peripheral end surface of the printing material 11, the printing material 11 is positioned and fixed. Thereafter, the printing material 11 positioned on the stage 8 is raised to near the bottom surface of the screen 15 by the vertically moving cylinder device 14, and the printing material 11 is moved up and down while scraping the printing paste 16 on the screen 15 with the horizontally moving printing squeegee 17. is being printed on.

[0005]

[Problems to be Solved by the Invention] However, in the conventional configuration shown in FIG. 2, it is necessary to manufacture a dedicated positioning stage 3 equipped with a suction means according to the external dimensions of the printing medium 2, which increases the cost. There was a problem with becoming.

[0006]Furthermore, in a production site where the types of printing materials are changed frequently, the dedicated positioning stage 3 may not be manufactured in time by the production start date, and each time, the machine is wasted and the machine is stopped for a change. Therefore, there was a problem that the work efficiency of setup change was poor.

Next, in the conventional configuration shown in FIG. 3, the position of the support pin 10 can be adjusted by inserting and removing it according to the external dimensions of the printing medium 11.
Since there is no need to manufacture a dedicated positioning stage each time as in the conventional example shown in FIG. However, if it is necessary to print on both the front and back sides, especially for double-sided electronic component mounting boards, electronic components are mounted on the side that was mounted first, so support should be avoided by avoiding those electronic components. There is a problem in that it takes a lot of effort to erect the pins 10 on a screen printing machine.

[0008] The present invention has been made to solve these problems, and it is an object of the present invention to provide a screen printing machine that does not require skilled work and allows easy setup changes.

[0009]

[Means for Solving the Problems] In order to solve this problem, the present invention provides a positioning stage that has means for positioning and fixing the printing material and is movable up and down to an arbitrary height, and a plurality of positioning insertion pins provided, a plurality of external setup batch replacement plates that are positioned on the stage by the positioning insertion pins and can be attached to and detached from the stage; and a plurality of external setup batch replacement plates provided on the external setup batch replacement plates. The printer is equipped with a plurality of removable support pins that are inserted into support pin insertion holes and hold the printing material.

0010

[Function] According to the above-described structure, by preparing a plurality of batch exchange plates for external setup, the present invention provides support during external setup in advance during printing according to the substrate to be printed next. The position of the pin can be adjusted, so when changing setups, all you need to do is to position the batch replacement plate for external setup on the positioning stage using the positioning insert pins, and you can easily set up the setup without the need for skilled work. It becomes possible to make a replacement.

In addition, since the position of the support pin can be adjusted according to the external dimensions of the printing material, there is no need to manufacture and replace a dedicated positioning stage equipped with a suction circuit each time, reducing machine downtime due to setup changes. It is possible to minimize this and reduce the running cost to zero by manufacturing a dedicated stage.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS A screen printing machine according to an embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a plurality of removable support pins 2 are inserted into support pin insertion holes 19 of a batch exchange plate 18 for external setup.
Rotating rollers 2 are attached to the tips of cylinder devices 22a and 22b that hold the printing material 21 and drive it horizontally.
A pair of stages 25a, 23b are pressed against the outer peripheral end surface of the printing material 21 and the printing material 21 is sandwiched therebetween.
25b, and is configured to position and fix the printing medium 21 relative to the printing medium 25b. Stage 25a, 25
The printing material 21 positioned at point b is raised by the cylinder device 24 at the lower end to near the lower surface of the screen 26 at the upper end, and in this state, the printing paste 2 on the screen 26 is
7 with a printing squeegee 28 that moves horizontally, printing is performed on the printing material 21. When printing is completed, the cylinder device 24 moves the stages 25a, 2
5b, the printing material 21 is lowered.

[0013] The batch exchange plate 18 for external setup is
The positioning insertion pins 30a and 30b attached to both ends of the stage 29 so as to protrude upward are connected to the positioning hole 31 on one end and the elongated positioning hole 32 on the other end, which are provided in the batch exchange plate 18 for external setup. are fitted and positioned.

In addition to the one attached to the screen printing machine, at least one batch replacement plate 18 for external setup is prepared and used during printing to support pins for the next printing material. Adjust the position in advance.

When the external dimensions of the printing medium 21 are changed, the moving stage 25b attached to the slider 34 movable on the rail 33 is moved in accordance with the external dimensions of the printing medium 21, and the size of the printing medium 21 is adjusted in advance. At the same time, the batch replacement plate 18 for external setup, which has been prepared by attaching the support pin 20, is fitted onto the positioning insertion pins 30a and 30b and mounted on the stage 29.

When the thickness of the printing material 21 is changed, the upper limit stroke of the cylinder device 36 for moving the stage 29 up and down can be adjusted using the nuts 37a and 37b. As described above, according to this embodiment, the batch replacement plate 18 for external setup is provided with a plurality of support pin insertion holes 19.
By fitting the support pins 30a and 30b into the positioning insertion pins 30a and 30b so that they can be detachably attached to the stage 29, the support pins 20 can be adjusted externally in advance to match the material to be printed next. Since the position can be adjusted, machine down time due to setup changes can be minimized and setup changes can be performed with good work efficiency. In addition, there is no need to manufacture a positioning stage that matches the external dimensions of the printing medium, and the support pins 20 can be inserted and removed freely according to the external dimensions of the printing medium 21, so running costs during setup changes can be reduced to zero. be able to.

[0017]

As described above, according to the present invention, in a screen printing machine, a plurality of positioning insertion pins are provided on a positioning stage, and the positioning pins are positioned by the positioning insertion pins, and the positioning stage is attached to and removed from the screen printing machine. By providing a flexible batch exchange plate for external setup and a plurality of support pins that are inserted into a plurality of support pin insertion holes provided in the batch exchange plate for external setup and hold the substrate, printing can be performed. During setup, you can adjust the position of the support pins according to the substrate to be printed next during setup, so when changing setup, insert the batch replacement plate for external setup onto the positioning stage. Simply positioning with pins is sufficient, and it is possible to change setups with good work efficiency without requiring skilled work.

Furthermore, since the position of the support pin can be adjusted according to the external dimensions of the printing material, there is no need to manufacture and replace a dedicated positioning stage equipped with a suction circuit each time, reducing machine downtime due to setup changes. It is possible to minimize this and reduce the running cost to zero by manufacturing a dedicated stage.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a screen printing machine according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of a conventional screen printing machine.

FIG. 3 is a front view of another conventional screen printing machine.

[Explanation of symbols]

18 Batch replacement plate for external setup 19
Support pin insertion hole 20 Support pin 21 Printed material 22a Cylinder device 22b Cylinder device 23a Rotating roller 23b Rotating roller 24 Cylinder device 25a Stage 25b Stage 26 Screen 29 Stage 30a Positioning insertion pin 30b Positioning insertion pin 31 Positioning hole 32 For positioning long hole

Claims (1)

[Claims] 1. A positioning stage that has means for positioning and fixing a printing material and is movable up and down to an arbitrary height, a plurality of positioning insertion pins provided on the stage, and the positioning insertion pins. a plurality of batch exchange plates for external setup that are positioned on the stage and detachable from the stage; and a plurality of support pin insertion holes provided in the batch exchange plates for external setup to hold the printed material. Screen printing machine equipped with multiple removable support pins.