CN112208203A

CN112208203A - Rear positioning mechanism for sheet-fed die cutting thermoprinting machine

Info

Publication number: CN112208203A
Application number: CN202011208336.9A
Authority: CN
Inventors: 蔡锦者; 李立顺
Original assignee: Zhejiang Dayuan Machinery Co ltd
Current assignee: Zhejiang Dayuan Machinery Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-01-12

Abstract

The invention discloses an automatic positioning and adjusting device for a sheet-fed gold stamping die-cutting machine, which comprises a rack (1), a movable platform (12) and a positioning unit, wherein the positioning unit is provided with a positioning swing rod (5) and a linear cam (2), one end of the positioning swing rod is in movable contact with the linear cam, and the other end of the positioning swing rod is connected with a spring (6) arranged on the movable platform. The positioning and adjusting mechanism with the structure can automatically adjust and position the paper to be processed, so that the precision of the paper gilding and die cutting is realized, and the gilding and die cutting quality of the paper is ensured.

Description

Rear positioning mechanism for sheet-fed die cutting thermoprinting machine

Technical Field

The invention relates to a die cutting and hot stamping machine, in particular to a positioning and adjusting mechanism of the die cutting and hot stamping machine.

Background

At present, the die cutting and hot stamping machine is developed from a single machine set to a plurality of machine sets, and the speed and the working efficiency are greatly improved. The die-cutting and stamping machine has two sides, and generally, an operator monitors the operation on one side, which is called an operating side, and the other side is called a transmission side. For the die cutting and hot stamping machine, the paper conveying precision is the premise of ensuring the die cutting and hot stamping quality. For a single-sheet die cutting and hot stamping machine, paper is transferred through a tooth row body, specifically, a plurality of tooth row bodies are uniformly distributed and installed on two parallel and closed transmission chains, tooth sheets are installed on the tooth row bodies and used for picking up the paper, so that the die cutting and hot stamping precision of the die cutting and hot stamping machine depends on the positioning precision of the paper, and the positioning precision of the paper depends on the positioning precision of the tooth row bodies. In order to realize positioning, a structure that a positioning swing rod is matched with a linear cam is adopted, the positioning swing rod is arranged on a movable platform of the die cutting and hot stamping machine, the positioning swing rod swings in the process of ascending and descending along with the ascending and descending of the movable platform, and after swinging, the positioning swing rod is in contact with the gripper bar body, so that the positioning is realized. The positioning swing rod and the linear cam form a positioning unit. Generally, in order to accurately position the positioning unit, the positioning unit is installed at the paper output end of the middle die cutting and hot stamping machine, and therefore, the positioning unit is also called as a rear positioning unit, and the positioning units on the whole equipment are called as rear positioning mechanisms. When the stamping units of the die cutting and hot stamping machine are a plurality of groups, the positioning unit of the first group of stamping units becomes a reference positioning unit. In order to solve the problem of accurate positioning, in the prior art, the gripper bar body is provided with a connecting seat, the connecting seat is movably connected with the connecting block through a connecting pin, the connecting block is connected with a transmission chain, an adjustable positioning pin is arranged on the connecting seat, a positioning swing rod is contacted with the positioning pin when swinging, a spring is sleeved on the connecting pin, and the spring is positioned in a gap between the connecting seat and the connecting block. For example, the following disclosure is made in a utility model with an authorization publication number CN202319264U and a name of a gripper positioning device: the utility model provides a gripper positioning device, has connecting seat, connecting block, chain and back lean on the rule, the connecting block with the chain is connected, the connecting seat passes through the connecting pin to be connected with the connecting block, the connecting seat is installed on the gripper body, its characterized in that be equipped with adjustable locating pin on the connecting seat, back lean on the rule when the swing with the locating pin contact. The connecting pin is sleeved with a spring, and the spring is positioned in a gap between the connecting seat and the connecting block. The reclining gauge is a positioning swing rod. If the publication number is CN201792558U, the name of the utility model is a gripper positioning device, the following is disclosed: a tooth row positioning device is characterized in that the tooth row positioning device is formed by rolling a chain positioning block, an adjusting screw, a chain, a connecting block, a tooth row body, a rear positioning swing rod and a positioning roller, wherein the chain positioning block, the adjusting screw, the chain, the connecting block, the rear positioning swing rod and the positioning roller are symmetrically arranged on two sides of the tooth row body; the scouring block is connected to the chain; the chain positioning block is positioned right above a chain link of a chain connected with the connecting block, the chain positioning block is fixed on the fixing piece, and the positioning roller is a roller on the chain link of the connecting block; the two ends of the gripper bar body are respectively fixedly connected to the connecting blocks, the rear positioning swing rod is a symmetrical piece and can rotate around an O point, the rear positioning swing rod is contacted with the positioning surface of the connecting blocks during consistent swinging to realize rear positioning, and the adjusting screw is arranged on the chain positioning block and can finely adjust the running direction of the chain positioning block. The publication number is CN101537937A, entitled dental row with positioning and adjusting device and working method thereof, and also discloses the following contents: a gripper bar of a positioning and adjusting device comprises a chain, a gripper bar body and a gripper, and is characterized by also comprising a sliding sleeve, a spring, a positioning small shaft, a fixing sleeve, an adjusting pad, a positioning sheet, a locking nut, a threaded sleeve, a connecting seat and a connecting block, wherein the tooth row body is arranged between the openings of the connecting seat, the positioning pin shaft passes through the tooth row body and the connecting seat, the part of the positioning pin shaft in the tooth row body and the connecting seat is sleeved with a spring, a sliding sleeve and a fixed sleeve, the spring is positioned between the sliding sleeve and the fixed sleeve, one end of the fixed sleeve is connected with the connecting seat in a matching way, one end of the sliding sleeve is connected with a connecting block, the spring, the sliding sleeve and the fixed sleeve are all arranged in the connecting block, the part of the positioning pin shaft extending out of the connecting block is sleeved in a threaded sleeve and is connected in a threaded matching way, the end part of the positioning pin shaft, namely the threaded sleeve, is connected with a locking nut in a threaded matching way, and the excircle of; the end face of the positioning pin shaft capable of being adjusted left and right is provided with two positioning faces, wherein the first positioning face is one part of the end face of the positioning pin shaft, and the second positioning face is the surface of a positioning sheet which is arranged on the other part of the end face of the positioning pin shaft and is provided with an adjusting pad. If the name of the publication is CN205836221U, the disclosure is a positioning and fine-tuning device for a modular ironing machine, and includes the following: the positioning unit comprises positioning components symmetrically arranged at two ends of the impression unit, each positioning component comprises a positioning swing rod and a tooth row body, the positioning swing rods can rotate around an installation shaft, positioning blocks are arranged on the positioning swing rods respectively, each positioning block is provided with a reference surface, the tooth row body on the tooth row body is provided with a reference matching surface, and when one end of each positioning swing rod swings, the reference surface of the positioning block on the positioning swing rod is in contact with the reference matching surface on the tooth row body, so that positioning is carried out. And discloses a positioning unit of this type for use in a multi-unit ironing machine. In the left and right positioning devices, the positioning swing rod is rotatably arranged on a shaft and matched with a linear cam arranged on a rack, and the positioning swing rod is lifted and swung to position by virtue of the lifting and falling of a movable platform of the die cutting and hot stamping machine. All the positioning devices deform in the long-term use process of the transmission chain, and after the die stamping precision of the equipment is reduced due to the occurrence of chain accumulated errors, the fine adjustment of the positioning swing rod is realized. And in the actual work, not only the chain can take place tensile deformation, and the deformation of tooth row body, the deformation of dental lamina in addition all can influence the conveying position of paper, lead to influencing the quality of cross cutting thermoprint. The existing positioning devices only finely adjust the gaskets on the positioning swing rods or automatically adjust the gaskets through springs, and because the transmission chains are provided with the plurality of gripper bar bodies, the adjustment can be achieved only when all gripper bar bodies are regularly scribed, the deformation of all gripper bar bodies is integrally uniform, and in actual processing, the gripper bar bodies cannot be processed to be regularly scribed, and errors always exist. After the transmission chain is used for a long time, the abrasion degree of each part is different, and the purpose of adjustment cannot be achieved by means of the devices such as collision generated between the tooth sheets and the paper. After understanding the background art, those skilled in the art have moved much more to the processing precision of the gripper bar body, the processing precision and quality of the chain, and the durability of the dental film, but still cannot meet the positioning requirements of these die cutting and hot stamping machines in actual work.

Disclosure of Invention

In view of the defects in the background art, the technical problem to be solved by the invention is to provide a rear positioning mechanism for a sheet-fed die cutting and stamping machine, which is used for accurately positioning paper.

Therefore, the invention is realized by adopting the following technical scheme: the rear positioning mechanism for the sheet-fed die-cutting hot stamping machine comprises a rack, a movable platform and a positioning unit, wherein the positioning unit is provided with a positioning swing rod and a linear cam, one end of the positioning swing rod is in movable contact with the linear cam, the other end of the positioning swing rod is connected with a spring mounted on the movable platform, the rear positioning mechanism is characterized by further comprising an automatic adjusting device for enabling the swing angle of the positioning swing rod to change, and the automatic adjusting device is electrically connected with a programmable controller.

The automatic adjusting device comprises a servo motor and an eccentric shaft, wherein the servo motor is arranged on the movable platform, the output end of the servo motor is connected with the eccentric shaft, the positioning swing rod is sleeved on the eccentric shaft, and the servo motor is electrically connected with the programmable controller.

The eccentric shaft is provided with a bearing sleeve, and the positioning swing rod is sleeved on the bearing sleeve.

The other technical scheme of the automatic adjusting device comprises a servo motor, an eccentric shaft and an adjusting plate, wherein the output end of the servo motor is connected with the eccentric shaft, a positioning swing rod is rotatably arranged on a fixed shaft, a linear cam is fixed on the adjusting plate, the adjusting plate is sleeved on the eccentric shaft, the servo motor is arranged on a rack through a fixing plate, and the servo motor is electrically connected with a programmable controller.

The positioning units of the die cutting and hot stamping machine are at least one group.

The fixed plate is provided with a sliding groove, the adjusting plate is provided with a pulley, and the pulley is arranged in the sliding groove.

And one end of the positioning swing rod is provided with a roller which is in movable contact with the linear cam.

The automatic adjusting devices are symmetrically arranged at the two radial ends of the movable platform.

According to the structure, the positioning swing rod can be independently adjusted through the servo motor, and at the beginning, only the error numerical value when each gripper bar body reaches the positioning swing rod needing to be positioned after picking up paper is measured, and the parameters needing to be adjusted of each gripper bar body are input into the programmable controller, so that each gripper bar body can be accurately and automatically positioned, the precision of die cutting and hot stamping is realized, and the defects in the prior art are overcome.

Drawings

The details of the present invention are further described below with reference to the accompanying drawings.

FIG. 1 is a general structural diagram of a first embodiment of the present invention;

FIG. 2 is an enlarged view of the present invention at FIG. 1M;

FIG. 3 is a block diagram of the automatic adjustment apparatus of FIG. 1 according to the present invention;

FIG. 4 is an overall structural view of a second embodiment of the present invention;

FIG. 5 is an enlarged view of the invention at FIG. 4N;

FIG. 6 is a block diagram of the automatic adjustment apparatus of FIG. 4 according to the present invention;

FIG. 7 is a view of the present invention shown in FIG. 6 with the mounting plate removed;

fig. 8 is a view showing the structure of the dental row body of the present invention.

Detailed Description

The first embodiment is as follows: referring to the attached drawings 1-3 and 8, the rear positioning mechanism for the sheet-fed die-cutting hot stamping machine comprises a frame 1, a movable platform 12, a fixed platform 14 and a positioning unit, wherein the positioning unit is provided with a positioning swing rod 5 and a linear cam 2, the linear cam 2 is fixedly arranged on the frame 1, one end of the positioning swing rod 5 is in movable contact with the linear cam 2, and the other end of the positioning swing rod is connected with a spring 6 arranged on the movable platform, so that the reset action of the positioning swing rod 5 is realized. The rear positioning mechanism is also provided with an automatic adjusting device which enables the swing angle of the positioning swing rod to change, and the automatic adjusting device is electrically connected with a programmable controller. Specifically, the automatic adjusting device comprises a servo motor 7 and an eccentric shaft 8, the servo motor 7 is installed on a movable platform 12, the output end of the servo motor 7 is connected with the eccentric shaft 8, the positioning swing rod 5 is sleeved on the eccentric shaft 8, so that the positioning swing rod 5 swings around the eccentric shaft, and the servo motor 7 is electrically connected with a programmable controller. When the movable platform 12 goes up and down, the servo motor 7, the eccentric shaft 8 and the positioning swing rod 5 are driven to move up and down, one end of the positioning swing rod 5 is in contact with the linear cam 2 fixed on the rack 1 and swings under the action of the linear cam 2, and after the linear cam 2 swings, the linear cam contacts the gripper bar body 3 staying at the position, and particularly contacts with the positioning surface on the connecting seat 11 of the gripper bar body 3 to realize accurate positioning. The positioning units are symmetrically arranged at two radial ends of the movable platform 12, the radial direction refers to the direction perpendicular to the paper advancing direction, and the positioning units at the two ends are a group of positioning units and can be independently adjusted. When the number of the stamping units of the die-cutting and stamping machine is two or more than two, the number of the positioning units is the same as that of the stamping units, so that no matter the die-cutting and stamping machine is a single-unit die-cutting and stamping machine or a multi-unit die-cutting and stamping machine, at least one positioning unit is provided.

In order to enable the positioning swing rod 5 to be sleeved on the eccentric shaft 8 to swing flexibly, a bearing sleeve 9 is installed on the eccentric shaft 8, and the positioning swing rod 5 is sleeved on the bearing sleeve 9. In order to enable the positioning swing rod 5 to be in good contact with the linear cam 2 and to flexibly transmit the swing of the positioning swing rod 5, a roller 10 is arranged at one end of the positioning swing rod 5, and the roller 10 is in movable contact with the linear cam 2.

The principle of realizing accurate adjustment and positioning is the same for both the single-unit die-cutting and hot-stamping machine and the multi-unit die-cutting and hot-stamping machine, and the adjustment process is described in detail below with respect to the single-unit machine as an example.

After the die cutting and hot stamping machine is assembled and in a delivery state, the gripper bar body 3 picks up paper, after the gripper bar body 3 moves to the positioning unit, when the gripper bar body 3 is in contact with the positioning swing rod 5, the gripper bar body is measured, and the specific measuring method is the error between the position required by die cutting and hot stamping and the actual die cutting and hot stamping position. Measuring an error value, wherein the error value has a positive value or a negative value, and when the error value is a positive number, the paper passes over the accurate position; when the error value is negative, the tooth row body does not reach the accurate position, and when the error value is zero, the tooth row body is indicated to stay at the accurate position. Since a single set of positioning units has a set of positioning units, it is necessary to measure both error values at a set of positioning units. If five tooth row bodies are installed on a transmission chain of a single-unit die cutting and hot stamping machine, five sets of error values, namely 10 error values, need to be measured.

And inputting the error value into a parameter input interface of the programmable controller (the error value is zero, and the parameter input interface inputs 0). The error values of all the gripper bar bodies 3 on the transmission chain 4 after moving to the contact of the positioning units and the positioning swing rods 5 are all input into a parameter input interface of the programmable controller, so that the programmable controller has a memory function, and therefore, the programmable controller can know the error value of each gripper bar body 3 after moving to the contact of the positioning units and the positioning swing rods 5. After the setting is finished, when the machine is started to work, when the gripper bar body 3 moves to the positioning unit, the programmable controller enables the servo motor 7 to rotate by an angle firstly, the eccentric shaft 8 is driven to rotate, then the positioning swing rod 5 is driven to swing by an angle firstly, when the die cutting and hot stamping are carried out, after the movable platform 12 rises, the idler wheel 10 on the positioning swing rod 5 is in contact with the linear cam 2 for positioning, and when the positioning swing rod 5 swings and then is in contact with the positioning surface on the gripper bar body 3, the accurate positioning can be realized, and the error is eliminated.

The control process is further described below, and the error value is calculated by converting the error value into the rotation angle of the positioning swing rod, and when the error value is positive, the positioning swing rod 5 swings forward, and when the error value is negative, the positioning swing rod 5 swings backward. It is assumed that when the error value is 0 °, the positioning swing rod is in the 0 ° position. Taking the operation side of the transmission chain 4 on which five gripper bar bodies are mounted as an example, for example, the error value of the first gripper bar body 3 after contacting the positioning swing rod 5 is +5 degrees, the error value of the second gripper bar body 3 is-5 degrees, the error value of the third gripper bar body is +10 degrees, the error value of the fourth gripper bar body 3 is +15 degrees, and the error value of the fifth gripper bar body 3 is-10 degrees, when all the values are input into the parameter input interface of the programmable controller, and the first gripper bar body 3 reaches the corresponding positioning unit, the servo motor 7 drives the eccentric shaft 8 to swing the positioning swing rod forward by 5 degrees, and the positioning of the first gripper bar body 3 is automatically adjusted; when the second gripper bar body 3 reaches the corresponding positioning unit, the servo motor 7 drives the eccentric shaft 8 to enable the positioning swing rod 5 to swing backwards by 10 degrees, and the positioning of the second gripper bar body 3 is automatically adjusted; when the third gripper bar body 3 reaches the corresponding positioning unit, the servo motor 7 drives the eccentric shaft 8 to enable the positioning swing rod 5 to swing forward by 15 degrees, so that automatic adjustment of the third gripper bar body 3 is realized, when the fourth gripper bar body 3 reaches the corresponding positioning unit, the servo motor 7 drives the eccentric shaft 8 to enable the eccentric shaft to enable the positioning swing rod to swing forward by 5 degrees, so that automatic adjustment of the fourth gripper bar body 3 is realized, when the fifth gripper bar body 3 reaches the corresponding positioning unit, the servo motor drives the eccentric shaft 8 to swing backward by 25 degrees, so that automatic adjustment of the fifth gripper bar body 3 is realized. The backward direction refers to positioning the swing rod 5 away from the gripper body 3; forward means that the positioning swing rod 5 is close to the gripper block 3. As can be known from the above description, the standard swing angle of the positioning swing rod 5 is, for example, 0 to 60 degrees, and then when the positioning swing rod 5 swings 5 degrees in front of the positioning swing rod, and the movable platform 14 moves up and down, the swing angle of the positioning swing rod 5 is changed to 5 to 65 degrees, so that the initial angle of the positioning swing rod 5 is changed by the adjustment. The error parameters described above are provided by way of example only to enable those skilled in the art to fully understand the embodiments of the present invention and are not actual parameters thereof. Because the error value parameters when each gripper bar body 3 moves are set in advance, the above actions can be realized when each gripper bar body 3 moves to the positioning unit, so that the gripper bar bodies 3 in circulating transmission can reach accurate positions when being stopped for die cutting and hot stamping, and realize accurate positioning and the quality of the die cutting and hot stamping. When the equipment is used for a long time and positioning errors occur due to the stretching of the transmission chain 4, the deformation of the gripper bar body 3 and the gripper 13 and the like, the steps are repeated, and the purpose can be achieved.

When the die cutting and hot stamping machine is a multi-unit machine, each gripper bar body 3 is moved to the corresponding positioning unit, the above operations and settings are also performed, but the number of parameter sets set on the programmable controller is large, if the dual-unit die cutting and hot stamping machine possibly has nine gripper bar bodies, the number of parameters set on the programmable controller is as much as 18, and the implementation process is the same as that described above, and is not described again.

Example two:

referring to fig. 4-6, the present embodiment is different from the first embodiment in that the mounting position and structure of the automatic adjusting device are somewhat different, and specifically, the automatic adjusting device includes a servo motor 7, an eccentric shaft 8, and an adjusting plate 17, an output end of the servo motor 7 is connected to the eccentric shaft 8, the positioning swing rod 5 is rotatably mounted on a fixed shaft 15, so that the positioning swing rod 5 swings around the fixed shaft 15, the linear cam 2 is fixed on the adjusting plate 17, the adjusting plate 17 is sleeved on the eccentric shaft 8, as will be known to those skilled in the art, the eccentric shaft 8 has eccentricity only at its portion cooperating with the adjusting plate 17, and other portions are not eccentric; the servo motor 7 is installed on the frame 1 through a fixing plate 18, and the servo motor 7 is electrically connected with the programmable controller. In order to facilitate the sliding of the adjusting plate 17 on the fixing plate 18, a sliding groove 20 is provided on the fixing plate 18, and a pulley 19 is provided on the adjusting plate 17, wherein the pulley 19 is disposed in the sliding groove 20. When the servo motor 7 works, the eccentric shaft 8 is driven to rotate, and the adjusting plate 17 is driven to move after the eccentric shaft 8 rotates, so that the position of the linear cam 2 is changed, the initial position of the positioning swing rod is changed, the initial swing angle of the positioning swing rod is adjusted, the automatic adjustment principle is the same as that of the embodiment, and therefore the automatic adjustment principle is not repeated.

The structure of the invention can realize the real accurate positioning of the tooth row body, and the aim of calibrating and positioning can be realized by setting the error parameters no matter how the transmission chain is stretched and deformed, the tooth row body is not processed uniformly, the tooth piece is deformed and other factors, therefore, the service time of the transmission chain, the tooth row body and the tooth piece of the die cutting and hot stamping machine is effectively prolonged, the problem that the transmission chain, the tooth row body and the tooth piece of the die cutting and hot stamping machine cannot be adjusted to be accurately positioned after being deformed is practically solved, the technical scheme is convenient and simple to adjust, the problem of completely solving the accurate positioning of the die cutting and hot stamping machine is solved, and positive use effect is certainly brought to the post-press processing industry.

Claims

1. The utility model provides a back positioning mechanism for sheet-fed cross cutting thermoprinting machine, includes frame (1), movable platform (12) and positioning unit, positioning unit has location pendulum rod (5) and linear cam (2), the one end of location pendulum rod (5) with linear cam (2) movable contact, the other end with install spring (6) on movable platform (12) are connected, its characterized in that still has and makes location pendulum rod (5) swing angle produces the automatic regulating apparatus who changes, automatic regulating apparatus is connected with programmable controller electricity.

2. The post-positioning mechanism for sheet-fed die-cutting and hot-stamping machines as claimed in claim 1, characterized in that said automatic adjustment device comprises a servo motor (7) and an eccentric shaft (8), said servo motor (7) is mounted on said movable platform (12), the output end of said servo motor (7) is connected to said eccentric shaft (8), said positioning swing link (5) is sleeved on said eccentric shaft (8), and said servo motor (7) is electrically connected to said programmable controller.

3. The post-positioning mechanism for sheet-fed die-cutting and hot-stamping machines as claimed in claim 2, characterized in that the eccentric shaft (8) is provided with a bearing sleeve (9), and the positioning swing link (5) is sleeved on the bearing sleeve (9).

4. The post-positioning mechanism for sheet-fed die-cutting and hot-stamping machines as claimed in claim 1, characterized in that the automatic adjusting device comprises a servo motor (7), an eccentric shaft (8) and an adjusting plate (17), the output end of the servo motor (7) is connected with the eccentric shaft (8), the positioning swing rod (5) is rotatably mounted on a fixed shaft (15), the linear cam (2) is fixed on the adjusting plate (17), the adjusting plate (17) is sleeved on the eccentric shaft (8), the servo motor (7) is mounted on the frame (1) through a fixing plate (18), and the servo motor (7) is electrically connected with the programmable controller.

5. The post-positioning mechanism for sheet-fed hot and die cutting machine according to claim 2 or 4, wherein the positioning units of the hot and die cutting machine are at least one set.

6. The post-positioning mechanism for sheet-fed hot and die cutting machines according to claim 4, characterized in that the fixing plate is provided with a sliding slot (20), the adjusting plate is provided with a pulley (19), and the pulley (19) is placed in the sliding slot (20).

7. The post-positioning mechanism for sheet-fed hot and die cutting machines according to claim 2 or 4, characterized in that one end of the positioning swing link (5) is provided with a roller (10), and the roller (10) is in movable contact with the linear cam (2).

8. The post-positioning mechanism for sheet-fed die-cutting and hot-stamping machines according to claim 2 or 4, characterized in that said automatic adjustment means are symmetrically mounted at the radial ends of said movable platform (12).