CN207432984U - A kind of improved screen process press - Google Patents

Abstract

The utility model provides a kind of improved screen process press, including control device, for installing the screen frame of halftone, printing frictioning and printing table for placing stock, a servomotor is installed at four angles of screen frame respectively on the printing machine, each servomotor is connected with the control device of the printing machine, respectively servomotor is controlled to operate by the control device, adjust the distance between screen frame and printing table of every nook and cranny.The improved screen process press of the utility model can the distance between four corner locations of adjust automatically halftone and printing table, reduce screen printing process in anamorphose amount, improve product quality, reduce replace halftone frequency, reduce cost.

Description

A kind of improved screen process press

Technical field

The utility model is related to circuit print field more particularly to a kind of improved screen processes press.

Background technology

Silk-screen printing is the extruding by scraper plate, and ink is made to be transferred to by the mesh of areas on stock, is formed With the picture and text as original copy, since screen printing apparatus is simple and convenient to operate, print, simple and of low cost, adaptability of making a plate The advantages that strong, single side printed wiring board mostly forms circuit, welding resistance and two sides character graphics using the method for silk-screen printing, but passes The silk screen of system makes to obtain by artificially stretching the tension at four angles of measurement, and tension is bigger, and the anamorphose printed is smaller, But tension too conference is scored a goal, and in order to pursue balance, usually controls four angles of silk screen between 26N-28N, but due to artificial The error and silk screen of operation are easily deformed reasons such as (including deformations silk screen tension set, screen frame in itself) in itself, it is difficult to really It protects each pull spring net and all meets requirement, it, in use, also can be with print even if meeting requirement at first The increase of brush number and aggravate its deformation, so as to exacerbate printing offset, in general, with becoming smaller for tension, printing The more easy outside offset of image, obtain circuit and gradually expand around, cause product rejection, in addition, on printing machine silk screen with print On brush table top the distance of stock (pcb board) can also change when access times increase or screen frame at some Particle can also influence local area network frame height degree etc., can directly affect printing quality.

On existing screen process press, the installation site of screen frame and printing table is all changeless, and lifts version device Middle installation uniform speed electric motor carries out at the uniform velocity lifting version operation, after repeatedly print, when there is halftone partially or fully tension variation When influencing printing quality, in order to ensure normally printing, typically directly replace new halftone and printed.This screen process press is certainly Row corrects the problems such as anamorphose caused by silk screen tension variation, and printing efficiency is low.

The content of the invention

The technical problems to be solved in the utility model, is to provide a kind of improved screen process press, four angles of screen frame with The distance between printing screen plate is adjustable, reduces printing deformation, improves product quality, reduces the frequency for replacing halftone, reduce into This.

The utility model is realized in this way：A kind of improved screen process press, including control device, for installing halftone Screen frame, the printing frictioning and printing table for placing stock, four angles of screen frame install one respectively on the printing machine A servomotor, each servomotor are connected with the control device of the printing machine, are controlled respectively by the control device Servomotor running processed, adjusts the distance between screen frame and printing table of every nook and cranny.

Further, the screen frame is installed on two closed slides, and four servomotors are separately mounted to described in two Guide rail both ends, the servomotor control screen frame corresponding position in the vertical direction by controlling the lifting of guide rail corresponding position Movement.

Further, four frame of screen frame is integrally formed.

Further, the printing machine is equipped with to lift the speed change lift version device of halftone, and the speed change lifts version device Including variable speed electric motors, particularly, by control device its start is controlled to carry out speed change lift version and operated.

The utility model has the following advantages that：

1st, one servomotor is installed respectively by four corners in screen frame, adjusts four positions of screen frame respectively as needed The distance between printing table is put, reaches the function of printing compensation, without that frequently with draping version, can also realize that precision is higher Circuit printing, substantially reduce cost, improve product printing quality；

2nd, original at the uniform velocity lift version is substituted using speed change lift version, solves the problems, such as that ink is adhered, and is further carried to the full extent High printing precision improves printing efficiency.

Description of the drawings

The utility model is further described in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is the improved screen printer print schematic diagram of the utility model.

Fig. 2 is offset schematic diagram before the correction of the utility model pcb board.

Fig. 3 schematic view of the mounting position between servomotor of the present invention and screen frame.

Fig. 4 is present invention lift version process schematic.

Drawing reference numeral explanation：

1- halftones, 2- printing tables, 3- stocks, 4- screen frames, 5- servomotors, 6- printed patterns, 7- detecting points, 8- are led Rail, 9- printing rubbers are scraped.

Specific embodiment

It is shown as shown in Figure 1, Figure 3 and Figure 4, a kind of improved screen process press, including control device (not shown), for installing The screen frame 4 of halftone 1, printing frictioning 9 and the printing table 2 for placing stock 3 (i.e. pcb board), screen frame 4 on the printing machine Four angles one servomotor 5 is installed respectively, each servomotor 5 is connected with the control device of the printing machine, lead to Cross the control device controls servomotor 5 to operate respectively, adjusts the distance between screen frame 1 and printing table 2 of every nook and cranny.

Preferably, the screen frame 4 is installed on two closed slides 9, four servomotors are separately mounted to described in two 9 both ends of guide rail, the servomotor control screen frame corresponding position in vertical direction by controlling the lifting of 9 corresponding position of guide rail Upper movement.

Preferably, 4 four frame of screen frame is integrally formed.

Preferably, the speed change that the printing machine is equipped with to lift halftone lifts version device, the speed change lifts version device bag Variable speed electric motors, particularly is included, variable speed electric motors, particularly controls its start to carry out speed change lift version and operates by control device, for example, printing rubber scrapes 9 movement rows Journey is 2 seconds, and lift version traveling time is also 2 seconds and is divided into：The acceleration of 20% (i.e. 0.4 second) of 2 seconds of the first stage knife stage, The at the uniform velocity mobile phase of 60% (i.e. 1.2 seconds) of 2 seconds of second stage and 20% (i.e. 0.4 second) of 2 seconds of the phase III Acceleration is returned sword the stage, and the specific rate of the three phases is adjusted by control device, can so overcome ink sticky net, correction General printed wire figure is playing the past widened problem in periphery of knife and figure of returning sword (referring to Fig. 2).

The use principle of the utility model printing machine：In use, can on halftone printed pattern four angles Fall the upper drift condition that detecting 7 is set, the detecting point 7 on detection pcb board is removed after acid etching, deviated when finding to have to exist Amount more than a preset value detecting point when, can according to its offset direction by the servomotor of detecting point nearby by screen frame to Above or corresponding distance is adjusted downwards, to reduce the deformation of the position, it is ensured that printing quality.Printed pattern is had in addition, working as Play that (or the place that returns sword) two detecting points at knife are equidirectional to be deviated and when offset is more than a preset value, can also be by adjusting The corresponding lift version speed for playing at knife (or the place that returns sword) of speed change lift version device is to speed-adaptive, to reduce deformation.

Four corners of the screen frame of the utility model adjust four positions of screen frame and printing by a servomotor respectively The distance between table top reaches the function of printing compensation, without that frequently with draping version, can also realize the higher circuit print of precision Brush substantially reduces cost, improves product printing quality；And original at the uniform velocity lift version is substituted using speed change lift version, to the full extent It solves the problems, such as that the too small caused ink of tension is adhered, further improves printing precision, improve printing efficiency, it is competing to greatly improve product Strive power.

Although the foregoing describe specific embodiment of the present utility model, those familiar with the art should Work as understanding, our described specific embodiments are merely exemplary rather than for the limit to the scope of the utility model Equivalent modification and variation fixed, that those skilled in the art are made in the spirit according to the utility model, all should Cover in the scope of the claimed protection of the utility model.

Claims (4)

1. a kind of improved screen process press, including control device, for installing the screen frame of halftone, printing frictioning and for placing The printing table of stock, it is characterised in that：A servomotor is installed at four angles of screen frame respectively on the printing machine, each The servomotor is connected with the control device of the printing machine, respectively servomotor is controlled to operate by the control device, Adjust the distance between screen frame and printing table of every nook and cranny.

2. a kind of improved screen process press according to claim 1, it is characterised in that：It is parallel that the screen frame is installed on two On guide rail, four servomotors are separately mounted to the two guide rail both ends, and the servomotor is by controlling guide rail corresponding The lifting of position controls the screen frame corresponding position to move in the vertical direction.

3. a kind of improved screen process press according to claim 1, it is characterised in that：Four frame of screen frame one into Type.

4. a kind of improved screen process press according to claim 1, it is characterised in that：The printing machine is equipped with and is used for The speed change lift version device of halftone is lifted, the speed change lift version device includes variable speed electric motors, particularly, by control device its start controlled to carry out Speed change lift version operation.