Gravure printing machine

Abstract

The invention discloses a gravure printing machine. The gravure printing machine comprises a winding group, a unwinding group and a middle color group, wherein the groups are connected together though cross beams and based which are fixed on wall boards of the groups, an operating corridor is arranged outside the wall boards, the winding group and the unwinding group are separately provided with a winding device and an unwinding device, the middle color group owns a plurality of groups, each color group is provided with a coining device and an oven heating device, and the coining devices of the color groups are connected together through transmission shafts in a synchronous manner. The gravure printing machine has good appearance and quality, compact structure and high installation precision, can ensure continuous roll-changing without stopping the machine, and is characterized by energy saving, high efficiency and low consumption.

Description

【Technical field】 [0001] The invention relates to a printing device, in particular to an improved invention of a gravure printing machine. 【Background technique】 [0002] Unit-type gravure printing machines generally have multiple sets of color groups. The two ends of the color groups are the winding group and the unwinding group. The winding group is equipped with a winding device, and the unwinding group is equipped with an unwinding device. An embossing device and an oven heating device are arranged on the top, and the above-mentioned wall panels of each group are fixedly installed on the base, and beams are connected between the wall panels. The existing unit-type gravure printing machine has the following disadvantages: 1. Due to the large shape of the unit-type gravure printing machine, for the convenience of operation (mainly when the upper part of the printing is used for material feeding), a safety operation is usually set on the outer wall of the printing machine. ...

AI Technical Summary

Problems solved by technology

The existing unit-type gravure printing machine has the following disadvantages: 1. Due to the large shape of the unit-type gravure printing machine, for the convenience of operation (mainly when the upper part of the printing is used for material feeding), a safety operation is usually set on the outer wall of the printing machine. Corridors, safe operation corridors generally include support beams, railings and pedals. The support beams are suspended outside the wall panels of the printing machine. The pedals are laid on the support beams. The riveted parts of the pedal and the pedal are exposed, which affects the appearance quality of the machine; 2. The overprint accuracy of the unit type gravure printing machine is the key to ensure the printing quality, and among the many factors that affect the overprint accuracy, the most influential point is the guide. The parallelism between the rollers, in the traditional design, the wallboards of each color group of the gravure printing machine are generally assembled by installing and fixing the lower main wallboard and the upper small wallboard on the beam respectively, and the lower main wallboard is mainly installed Embossing device, oven heating device, etc. The upper small wallboard is mainly installed in the cooling part after the material film leaves the oven. These three parts have guide rollers that need to be installed. When connecting these three parts, there will be assembly errors and installation accuracy. It is not high, and the installation of guide rollers is not parallel, which affects the overprinting accuracy. At the same time, the assembled wall panels are inconvenient to process, cumbersome to assemble, not compact in structure, and poor in operation stability; 3. Most of the existing unit-type gravure printing machines use Fixed single-station feeding and unwinding, if you want to change the material film, you must stop the operation, firstly, it will affect the work efficiency, and secondly, the tension will change due to the shutdown, and the machine must be re-registered when the machine is turned on again, and the printing is not completed in the printing machine The overprinting accuracy of the material film will inevitably be affected, resulting in waste products. Based on a 10-color printing machine, a roll change will produce about 60 meters of waste; 4. Most of the existing unit-type gravure printing machines use electric The heated oven heating device is used to dry the material film. The structure of the oven heating device is that the external air inlet pipe sucks fresh air into the heating box under the suction of the centrifugal fan. The heating box is equipped with an electric heating tube, and the electric heating tube works when it is powered on , to generate hot air, and then the centrifugal fan blows the hot air out from the blower outlet, through the hot air pipe, and finally enters the oven to dry the material film. Due to structural limitations, the length of the hot air pipe is long, and heat loss is inevitable. To make up for this Heat loss is generally solved by increasing the heating power. Taking the current 10-color 1000 printing machine as an example, the heating power is 120KW; in addition, the entire heating device includes an external heating box, a platform for installing the heating box and a centrifugal fan, and a bracket etc., the structure is complex and takes up a lot of space. When the machine is running, the fan installed on the bracket will vibrate and make a lot of noise; The biggest one is the material film. How to effectively reduce the loss of the material film has always been an urgent problem for printing equipment manufacturers to solve.

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