Printing machine

Abstract

The utility model relates to a printing machine which comprises a machine frame, an annular guide rail, a printing platen, a driving mechanism and a silk-screen printing device. The device is characterized in that a heating unit for electrically heating the surface of the printing platen is arranged in the printing platen; a power connection end of the heating unit extends out of the printing table plate and is connected with a power supply end through a contact switch structure, so that the power supply end electrifies the heating unit in the printing table plate; according to the self-heating structure of the printing platen of the printing machine, a heating area can be selected for independent heating, full-area heating is not needed, the power consumption can be effectively reduced, and the power consumption cost is reduced by more than 60%; the printing machine directly heats and dries the clothes subjected to color register printing through the printing table plate, the situation that hot air of the drying machine overflows to the screen plate to cause screen blocking can be reduced, and the cleaning frequency of the screen plate on the printing machine is reduced; a contact type switch structure is adopted for electric conduction of the printing platen, and the printing platen is smaller in resistance in the moving process, lower in energy consumption and better in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of clothing processing, in particular to a printing machine. Background Technique

[0002] A printing machine is an automated printing device applicable to various printing materials such as glue, water slurry, ink, etc., and is suitable for flat screen printing of clothing cut pieces, ready-made clothes, trousers, socks, umbrellas and other cut pieces; the applicable printing processes include: thick plate, discharge printing, and with a heat press, it can do gold stamping, silver stamping, etc.;

[0003] The flat screen plate of the traditional multi-color circular or oval printing machine runs in a circular or oval trajectory on the same plane. According to the requirements of the printing process, it is necessary to dry the printing surface after each color set is printed before the next color set can be printed. At present, the drying mechanism of the printing machine adopts one-to-one open heating. This traditional printing drying method has the following disadvantages:

[0004] 1. High equipment cost and high energy consumption: When using a cover-type dryer for drying, in order to ensure the production drying efficiency, the printing table generally needs to be heated to a temperature of 60°C - 80°C within 3S to achieve rapid drying of the printing agent. Moreover, due to the open design between the dryer and the printing table, the heat dissipates quickly. The resistance in the dryer needs to be heated to about 200°C to ensure that the printing table can reach the drying temperature of 60°C - 80°C in a short time, which increases a large amount of power consumption and raises the production cost; in addition, each printing station formed by the cooperation of the screen printing device and the printing table needs to be equipped with a dryer. The more stations there are, the more dryers there are, and the higher the cost.

[0005] 2. The screen printing device is prone to screen clogging: Since there is a gap between the dryer and the printing table to ensure the passage of the printing table, when drying the products on the printing table, the hot air scattered from both sides of the dryer is likely to be blown onto the adjacent printing screen plate, and the printing agent is prone to screen clogging under the interference of the hot air. It often needs to stop the machine for maintenance and clean the screen plate. The cleaning cycle of the screen plate is short and the maintenance is frequent, which reduces the production efficiency.

[0006] For example, a drying device for a screen printing machine disclosed in Chinese Patent 202320793683.5 discloses a self-heating platen for heating and drying, which adopts a sliding contact line structure; this heating platen using a sliding contact line can barely be used for printing plates with a small number of stations, but for a printing platen structure with multiple stations, the sliding contact line will greatly increase the resistance to the movement of the printing platen, and the printing platen will consume a lot of electricity during movement, and the contact position of the sliding contact line will be severely worn; in addition, in the sliding contact line structure, since it is used in the textile industry, although the sliding contact line has local sealing, it still has an exposed wire structure, which poses a great safety hazard and should not be used in the textile and garment industry. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a printing machine which can solve the problems of high energy consumption and easy screen clogging when traditional printing machines use a through-type dryer to print and dry color-printed clothes.

[0008] To solve the above technical problems, the technical solution of the present invention is: a printing machine comprising a frame, an annular guide rail arranged on the frame, a plurality of printing platens arranged on the annular guide rail, a driving mechanism for driving the printing platens to move along the annular guide rail, and a plurality of screen printing devices arranged in sequence along the annular guide rail, wherein the screen printing devices and the printing platens cooperate to form a plurality of printing stations; the innovation of the present invention is:

[0009] A heating unit for electrically heating the surface of the printing platen is provided in the printing platen; the power terminal of the heating unit extends out of the printing platen and is connected to the power supply terminal through a contact switch structure, so that the power supply terminal energizes the heating unit in the printing platen.

[0010] Furthermore, the printing platen is divided into several areas, and each area can be heated independently by a heating unit.

[0011] Furthermore, the heating unit includes a plurality of thermal resistors, and the thermal resistors are distributed in various areas of the printing platen. The thermal resistors are arranged in parallel through branch wires, and the branch wires connected to each thermal resistor are provided with a control switch that independently controls the on and off of each thermal resistor; after the branch wires are connected in parallel, they are connected to the power supply end through a contact switch structure.

[0012] Further, the contact switch structure includes a static contact and a moving contact; the static contact is arranged on the lower surface of the printing platen and moves along with the printing platen, and the static contact is the input end of the heating unit; there are several moving contacts which are arranged on the frame, the moving contacts are connected to the power supply end, and the moving contacts are arranged below the printing platen corresponding to each printing station; the moving contacts are driven by a moving contact driving module to synchronously connect the moving contacts with the static contacts, so as to energize the heating unit from the power supply end.

[0013] Further, the moving contact driving module includes a lifting cylinder and a linkage rod unit; several lifting cylinders are arranged below the printing platen at the printing stations; the moving contacts are connected through the linkage rod unit; each lifting cylinder corresponds to one moving contact or multiple moving contacts connected through the linkage rod unit share one lifting cylinder, and under the drive of the lifting cylinder, the moving contacts cooperate with the static contacts below the printing platen in the vertical direction.

[0014] Further, the moving contact driving module includes a rotary cylinder and a contact swing arm; several rotary cylinders are arranged below the printing platen at the printing stations; the contact swing arms are linked through connecting rods; the moving contacts are installed on the contact swing arms; each rotary cylinder corresponds to one contact swing arm or multiple contact swing arms connected through connecting rods share one rotary cylinder, and under the drive of the rotary cylinder, the moving contacts swing in the vertical plane to cooperate with the static contacts below the printing platen.

[0015] The advantages of the present utility model are as follows:

[0016] 1) In the present utility model, by adopting a self-heating structure for the printing platen, it replaces the way of drying by a through-type dryer used in traditional printing machines during color separation printing; the self-heating structure of the printing platen of the printing machine in this application can select the heating area for separate heating without the need for full-area heating, which can effectively reduce power consumption, and the electricity cost is reduced by more than 60%; in addition, the printing machine directly heats and dries the clothing printed with color separation printing on the printing platen, which can reduce the situation that the hot air of the dryer overflows to the screen plate and causes screen clogging, and reduce the cleaning frequency of the screen plate on the printing machine.

[0017] 2) In the present utility model, the printing platen uses a contact switch structure for conduction. Compared with the heating platen structure using a sliding contact wire, the printing platen has less resistance, lower energy consumption and better safety during the movement process. Description of the Drawings

[0018] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0019] Figure 1 It is a structural schematic diagram of a printing machine of the present utility model.

[0020] Figure 2 Schematic diagram of the linkage of the printing platen of a printing machine of the present utility model using a lifting cylinder.

[0021] Figure 3 Schematic diagram of the linkage of the printing platen of a printing machine of the present utility model using a rotary cylinder. Specific embodiments

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0024] As Figures 1 to 2 shown, a printing machine includes a frame 1, a circular guide rail 11 provided on the frame 1, a plurality of printing platens 12 provided on the circular guide rail 11, a driving mechanism for driving the printing platens 12 to move along the circular guide rail 11, and a plurality of screen printing devices 2 arranged in sequence along the circular guide rail 11, and the screen printing devices 2 cooperate with the printing platens 12 to form a plurality of printing stations.

[0025] A heating unit 13 for electrically heating the surface of the printing platen 12 is provided inside the printing platen 12; the power connection end of the heating unit 13 extends out of the printing platen 12 and is connected to the power supply end through a contact switch structure 14 to realize power supply to the heating unit 13 inside the printing platen 12.

[0026] A plurality of regions are defined on the printing platen 12, and each region can be independently heated by the heating unit 13.

[0027] The heating unit 13 includes a plurality of thermal resistors, and the thermal resistors are distributed in each region of the printing platen. The thermal resistors are connected in parallel through branch wires, and control switches for independently controlling the on and off of each thermal resistor are provided on the branch wires connected to each thermal resistor; the branch wires are connected in parallel and then connected to the power supply end through a contact switch structure.

[0028] The contact switch structure 14 includes a static contact 141 and a moving contact 142; the static contact 141 is arranged on the lower surface of the printing platen 12 and moves along with the printing platen 12, and the static contact 141 is the input end of the heating unit; there are several moving contacts 142 which are arranged on the frame 1, the moving contacts 142 are connected to the power supply end, and the moving contacts 142 are arranged below the printing platen 12 corresponding to each printing station; the moving contacts 142 are driven by a moving contact driving module 3 to synchronously connect the moving contacts 142 with the static contacts 141, so as to energize the heating unit 13 from the power supply end.

[0029] The moving contact driving module 3 includes a lifting cylinder 31 and a linkage rod unit 32; several lifting cylinders 31 are arranged below the printing platen 12 at the printing stations; the moving contacts 142 are connected through the linkage rod unit 32; each lifting cylinder 31 corresponds to one moving contact or multiple moving contacts 142 connected through the linkage rod unit 32 sharing one lifting cylinder 31, and under the drive of the lifting cylinder 31, the moving contacts 142 cooperate with the static contacts 141 below the printing platen 12 in the vertical direction.

[0030] The rest is the same as that of Embodiment 1, and the differences are as follows:

[0031] The moving contact driving module 3 includes a rotary cylinder 33 and a contact swing arm 34; several rotary cylinders are arranged below the printing platen 12 at the printing stations; the contact swing arms 34 are linked through connecting rods; the moving contacts 142 are installed on the contact swing arms 34; each rotary cylinder 33 corresponds to one contact swing arm 34 or multiple contact swing arms 34 connected through connecting rods sharing one rotary cylinder 33, and under the drive of the rotary cylinder 33, the moving contacts 142 swing in the vertical plane to cooperate with the static contacts 141 below the printing platen 12.

[0032] The working principle of the present utility model is as follows: by adopting a self-heating structure for the printing platen, it replaces the drying method using a through-type dryer in the traditional printing machine during color separation printing; the self-heating structure of the printing platen of the printing machine in this application can select the heating area for separate heating without the need for full-area heating, which can effectively reduce the power consumption, and the electricity cost is reduced by more than 60%; in addition, the printing machine directly heats and dries the clothing for color separation printing on the printing platen, which can reduce the situation that the hot air of the dryer overflows to the screen plate and causes screen clogging, and reduce the cleaning frequency of the screen plate on the printing machine; by adopting a contact switch structure for the conduction of the printing platen, compared with the heating platen structure using a sliding contact wire, the printing platen has less resistance, lower energy consumption and better safety during the movement process.

[0033] Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A printing machine, comprising a frame, an annular guide rail provided on the frame, a plurality of printing platens provided on the annular guide rail, a driving mechanism for driving the printing platens to move along the annular guide rail, and a plurality of screen printing devices arranged in sequence along the annular guide rail, and the screen printing devices cooperate with the printing platens to form a plurality of printing stations; characterized in that: A heating unit for electrically heating the surface of the printing platen is provided inside the printing platen; the power connection ends of the heating unit extend out of the printing platen and are connected to the power supply end through a contact switch structure, so as to realize the power supply end to energize the heating unit inside the printing platen.

2. A printing machine according to claim 1, characterized in that: A plurality of regions are defined on the printing platen, and each region can be independently heated by the heating unit.

3. A printing machine according to claim 2, characterized in that: The heating unit includes a plurality of thermal resistors, and the thermal resistors are distributed in each region of the printing platen. The thermal resistors are connected in parallel through branch wires, and control switches for independently controlling the on / off of each thermal resistor are provided on the branch wires connected to each thermal resistor; the branch wires are connected in parallel and then connected to the power supply end through a contact switch structure.

4. A printing machine according to claim 1 or 3, characterized in that: The contact switch structure includes a static contact and a moving contact; the static contact is provided on the lower surface of the printing platen and moves with the printing platen, and the static contact is the input end of the heating unit; there are a plurality of moving contacts and they are provided on the frame. The moving contacts are connected to the power supply end, and the moving contacts are arranged below the printing platen corresponding to each printing station; the moving contacts are driven by a moving contact driving module to synchronously connect the moving contacts and the static contacts, so as to realize the power supply end to energize the heating unit.

5. A printing machine according to claim 4, characterized in that: The moving contact driving module includes a lifting cylinder and a linkage rod unit; the lifting cylinder is provided below the printing platen at each printing station; the moving contacts are connected through the linkage rod unit; each lifting cylinder corresponds to one moving contact or a plurality of moving contacts connected through the linkage rod unit share one lifting cylinder, and under the drive of the lifting cylinder, the moving contacts cooperate with the static contacts below the printing platen in the vertical direction.

6. A printing machine according to claim 4, characterized in that: The moving contact driving module includes a rotary cylinder and a contact arm; there are a plurality of rotary cylinders and they are provided below the printing platen at each printing station; the contact arms are linked through connecting rods; the moving contacts are installed on the contact arms; each rotary cylinder corresponds to one contact arm or a plurality of contact arms connected through connecting rods share one rotary cylinder, and under the drive of the rotary cylinder, the moving contacts swing in the vertical plane to cooperate with the static contacts below the printing platen.

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