Multi-station synchronous transmission step indexer for curved surface printing machine

Abstract

The invention relates to curved surface printing equipment, in particular to a multi-station synchronous transmission step indexer of a curved surface printing machine. The step indexer comprises an indexing turntable, an intermittent driving device, a die handle driving system and a gas circuit system, wherein the die handle axis on the indexing turntable is parallel to the axis of the indexing turntable; the die handle driving system comprises a planet gear, a circular inner gear ring fixed seat, a fixed seat supporting rod, a circular inner gear ring, a driving motor and a transmission device; the circular inner gear ring fixed seat is fixed on a shell of the intermittent driving device through the fixed seat supporting rod; the indexing turntable is fixed with an output shaft of the intermittent driving device; a plurality of die handles are pivoted in bearing holes on the periphery of the indexing turntable through a die handle shaft; the planet gear is fixedly arranged at the other end of the die handle shaft; the circular inner gear ring is pivoted at the periphery of the circular inner gear ring fixed seat and engaged with the planet gear; and the circular inner gear ring is connected with the driving motor through the transmission device. All the die handles on the indexing turntable are accurately synchronous with the indexing turntable and a big transfer printing drum, so that the printing effect is clearer.

Description

technical field [0001] The invention relates to a curved surface printing device, in particular to a multi-station synchronous transmission step indexer for a curved surface printing machine. Background technique [0002] The multi-station synchronous transmission step indexer of the present invention is a multi-station synchronous transmission step indexer for cylindrical and cone-shaped curved surface printing machines, and its number of stations can be 4 to dozens of stations. The synchronous transmission is the synchronous transmission of all the mold handles on all stations on the indexing turntable, which is synchronously transmitted with the speed of the stepping indexer motor and the speed of the rotating speed of the large transfer drum. [0003] The stepping indexer of traditional cylindrical and conical curved surface printing machines such as figure 1 , figure 2 As shown, it includes an indexing turntable 2 provided with a plurality of mold handles 1, an inter...

AI Technical Summary

Problems solved by technology

[0005] 1. The radial indexing turntable of the traditional multi-station stepping indexer, since the mold handle is set on the peripheral side of the indexing turntable, and the axis of the die handle is perpendicular to the axis of the indexing turntable, it is bound to increase with the increase of stations. The large diameter of the indexing turntable greatly increases the moment of inertia of the indexing turntable, which cannot meet the needs of high-speed rotation

[0006] 2. The traditional mold handle transmission mode cannot achieve synchronous transmission of all the mold handles on the turntable. Even for individual die head transmission, the transmission line is too long and there are too many transfers, resulting in large errors and high failure rates.

Furthermore, the step indexer in this transmission mode can only start to drive the die handle at the moment when the step indexer is still in place between dynamic and static. If the printing machine is running at high speed, it can only start at the moment when the step indexer is in place. If it is driven, its corona, curing quality and speed will be greatly reduced

[0007] 3. When it is necessary to change the specification and shape of the die handle, it is necessary to install and disassemble the bearing, snap ring and die handle shaft, and then insert the die handle shaft into the station hole of the indexing turntable and tighten the screws. The process is complicated and takes a long time, which cannot meet the high-speed production needs

However, if the shaft jack of the turntable mold handle is changed frequently, it is easy to wear and affect the accuracy.

[0008] 4. On the synchronous transmission of the turntable, although the inventor has made some innovations to the existing technology in the patent No. ZL200820135995.2, there are still problems that the contact between the plane of the rubber roller wheel and the mold handle is easy to wear, or the soft and hard factors of the spring It affects the synchronous transmission of the die handles of each station, and the die handles of each station are passive transmission, because there are too many stations, the degree of tightness of the bearings and the machining accuracy of the die handles will also affect the synchronous transmission accuracy of each die handle

[0009] This shows that above-mentioned existing multi-station stepping indexer obviously still has inconvenience and defect in the structure of device and use, and urgently needs to be further improved

In order to solve the above-mentioned existing problems, relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time. This is obviously a problem that relevant manufacturers are eager to solve.

Images