Discussion on the Problems of the Plate Mounting Technology of Flat Paste Boxes

With the development of the market economy, the sales promotion effect of packaging and printing on commodities is also increasing. How to produce exquisite commodity packaging boxes is not only a technical issue in the prepress and printing process, but also a technology in post-press processing equipment and processing procedures. problem. Now we will analyze some problems in the paste box process with everyone.

First, knife technology - flat paste boxed version of the faucet:

The knife stencil of plane gluing machine generally consists of main knife door, auxiliary knife door, knife door sill, knife door belt, knife door pressure wheel, anti-brake foot and vibration. The quality of the knife door technology directly affects the speed and the quality of the material discharged. It is a strong backing for the plane gluer to maintain normal and high-speed operation.

(I) Conventional material knife technology:

The so-called conventional material, for the time being, is defined as having four longitudinally parallel blunt lines, with no window in the middle, and there is no quadrant of large area defect in each joint.
1. For narrower materials, single tool technology can be used. When the knife door is tightened, a space similar to a triangle is formed between the single-blade door and the two baffle plates. We use the triangle stability principle to keep the material held in place stable, so as to maintain the stability of the material and the expected material. degree.

2. For a wider material, it is necessary to add one auxiliary knife door, and at the same time, in order to maintain the inclined material surface into a plane, the number of anti-supporting feet must be increased, and the height and inclination angle of the brace should be adjusted; The lid of the box, sometimes also use the bottom of the anti-brace legs, in order to increase the speed of the part of the easy to lag behind, keep the material balance, so as to achieve the purpose of the material.

3. For longer materials, the foot base is usually used to increase the support, and sometimes it is even necessary to use reverse lengthening accessories to lengthen the distance between the brace and the knife door, and at the same time, to form an undercut due to the fact that the material is long and soft. The characteristics of the material surface, but also properly increase the height of the brace, so that the center of gravity of the material surface as close as possible to the bottom of the knife, in order to facilitate the continuous and stable discharge.

4. For the material with too deep horizontal transverse line or perforation line, in order to avoid the problem of no discharge or double-sheet discharge due to hooking during discharge, raise feet are usually used to increase the output. The angle of the material surface and the knife door belt. The purpose of this is to allow the stocks that have been pressed together to be set aside before they have been ejected, thereby avoiding the problem of hooking and guaranteeing the normality of the discharge.

(b) Irregular material knife technology:

The so-called irregular material, for the time being, it is defined as a material having a larger window (including various shapes of air openings or a window with a subsidy material) or a multi-part and part material having a large area of ​​defects and a longitudinal tenet line that is not parallel to the material.

(1) For materials with large air gaps on the material surface, the material surface is not easy to form a more consistent surface, which is the most significant drawback. At the same time, the airborne front is easy to discharge, while the back edge is easy to form a hook with the front and the material Pull bad. In response to such shortcomings, it is often taken to lower the feet as a whole, and put the feet at the front edge of the window to form a plane with the windowless part, and then let the freedom of thinking along the trail to increase the intensity of the material and avoid hooking.

(2) For window materials with subsidized materials, in addition to the knife window, the feet should be avoided as far as possible (but not too high) to ensure that the double-layer part of the window is not stuck or hooked.

(3) For multi-linked and partially-sized materials with large area defects, the extra portions on both sides are mostly formed after the box is decorated. At the front and rear ends, the width and width are generally adopted. The first step is to avoid hooks. Hanging, to ensure easy control of the discharge, while accompanied by more than the end of the baffle forward, to ensure that the end of more than a continuous downward movement of materials, and the appropriate compaction of the main knife at the pressure wheel to keep the material stable, more in the middle The normal loading knife door can be.

(4) For the material with non-parallel longitudinal blunt lines, the main unloading should generally be based on the characteristics of the box shape, adjust the deflection angle of the brace so that the brace is fully effective, and the pressing wheel is pressed properly so that the discharging can be maintained properly. Steady direction to minimize deviations.

Second, pre-folding and forming - the main body of the plane paste box

Folding carton is a sales packaging container with the widest range of applications and the most structural changes. It is generally made of folding-resistant cardboard with a thickness of between 0.3 and 1.1 mm. It is difficult to meet the stiffness requirement of less than 0.3 mm, and it is difficult to obtain a satisfactory indentation on the processing equipment of more than 1.1 mm. Whether tubular folding cartons or disc folding cartons. Generally, in the loading of the plates, the two types can be roughly divided into a straight line loading plate and a lock bottom loading plate.

(I) Straight-line loading technology - Simple preliminary analysis of flat pasting boxes

Linear version, as the name suggests, it does not need to lock in the swing wings, after the formation of the flat carton opened into a straight tube, the lid and the bottom of the box need to be manually packaged. When the package is opened, the tray can be restored to a flat shape. It follows the principle of "one-three pre-folding and two-four forming". The sticky cassette tabs generally follow the front panel (A panel), and are glued to the end panel (D panel) after the glue is applied, so that the cover panel inserts can be easily opened and locked when the folding cartons are opened. The bottom closure is to fold the two dust-proof bracts connected with the end plate first, and then fold the bottom plate and the bottom plate insert to insert and lock. In this way, the locking and fixing property is poor, so the weight of the contents in the box cannot be too heavy. The following is a general description of the sticking process of a straight-loaded plate.

(1) When the flat box material leaves the knife door, it enters a three-line pre-folded belt section. The first-line pre-folding is generally completed by the accessory edging machine, and the three-line pre-folding is performed by the belt's own unique pre-folding structure. Before entering the lock bottom section, the folded portion will be opened and restored to a flat plate shape.

(2) When entering the lock bottom belt section, normal operation can be performed.

(3) When entering the two-four-wire forming belt section, relying on the unique folding structure of the second and fourth-line belts, according to the box-shaped features, and adding appropriate accessories, the plane straight folding carton can be basically formed. (to be continued)