Common problems and solutions in the production of gift boxes

     

The production of gift boxes should take the samples provided by customers as a reference, and the structural dimensions must be consistent with the samples, and at the same time, perfect and proofing should be carried out according to the additional design requirements of the customer for the sample model. The production and preparation of gift boxes is generally based on the cutting line documents formulated by the production staff. The industrial cardboard is cut, die-cut, slotted, slitted, finished product discharge and other processes according to the cutting line standard to complete the product preparation; at the same time, the printing Paper, special paper and other materials are cut, die-cut (bronzing, indentation, embossing, etc.), waste removal, and finished product discharge according to the cutting line standard to complete the preparation. After the material is prepared according to the predetermined quantity, the production work starts. The production of book shaped packaging boxes by Rophone Packaging Factory is generally carried out according to the standard production process: glue on the outside - positioning on the cover - hemming - flattening - lining on the inside - flattening - installing magnets - brushing glue - assembling - pressing foam - rubbing glue on the finished product - Finished product inspection - Finished product rubbing glue inspection - Finished product packing.

  

   

1. The rationality of slotting

     

1. 1 Slotline angle

     

        When the raw materials are slotted, the slot lines are generally half-shaped, and the angles on both sides are the same. The angle of the industrial cardboard slot lines is usually controlled at 100 degrees to 120 degrees, and the gift box forming effect is the best within this angle. When the angle of the groove line is greater than the applicable angle of 120 degrees, the cardboard is bonded to the cover and the inner sticker. After the cover and the inner box are assembled and formed, when observing the side of the gift box, there is a large corner gap at the corner of the product, which affects the appearance of the gift boxes. When the angle of the groove line is less than 100 degrees of the applicable angle, after the cardboard is bonded to the cover and the inner page, the extrusion force at the groove line of the two folded surfaces is too large. After the cover and the inner box are assembled, the magnet at the opening and closing of the gift boxes will be squeezed. The pressure cannot be absorbed by the iron sheet installed on the front baffle, resulting in the failure of the gift box to meet the production requirements.

  

    

1.2.  Depth of groove

      

        The slotting depth of industrial cardboard, which is the raw material of gift boxes, is generally controlled at about 0.2mm during slotting. When using the backlight to observe the gray board, the light at the groove line is transparent, and the industrial cardboard is not easy to break. At this time, the gift boxes have the best forming effect. If the groove line is too shallow, the back of the industrial cardboard groove line is easy to burst, and the curved edge of the groove line after the printed cover paper is mounted on the box. Deep, in the post-process box mounting operation, the industrial cardboard is easy to break at the groove line, and it cannot be accurately positioned in the production bonding positioning, which seriously affects the product quality.

  

     

1.3.  Slot line bell mouth

    

        When observing the side of the finished gift boxes, it is easy to find that the gaps between the grooves on both sides are inconsistent, and there is also a common problem that the grooves are in the shape of a horn during the box mounting process. In order to maximize the aesthetics of gift boxes, it is necessary to improve the production process to avoid this problem. When using a manual dust-free slotting machine to slot industrial cardboard, in general, the two ends of the slot line are not equal in size, that is, one end is larger than the preset slot and is in the shape of a bell mouth, and the slotting machine is used for many times. This adjustment still cannot be eliminated. Therefore, it is adjusted from the perspective of the process, and the width of the gray board in the direction of the groove line is expanded. After the gray board is grooved by the slotting machine, the industrial cardboard is die-cut at the end of the groove line with the bell mouth to obtain the standard industrial cardboard finished product.

    

 

    

2. Bonding firmness

    

        The selection of adhesives for gift box production is very strict. First of all, it is necessary to understand the properties of different adhesives and the applicability of gift box materials. At the same time, the selection of adhesives also needs to consider factors such as safety and environmental protection, economy, bonding environment, drying speed, etc. . On the premise of meeting the requirements of applicable performance, safety and hygiene and other factors, we should try to use lower-priced adhesives to reduce production costs. For liquid adhesives, in addition to their physical performance indicators, it is more important to consider their safety and environmental performance, and it is necessary to detect whether they contain formaldehyde, toluene, xylene and other harmful substances. In order to ensure the qualified use of the adhesive, Rophone printing factory conducts a safety and hygiene-solvent residue test on the adhesive. According to the test results, it is analyzed that both adhesives conform to the safety and hygiene guidelines for production.

   

    

        The above two adhesives have similar properties and are suitable for the production of gift boxes. The cover of gift boxes and the bonding between the edge and the laminating paper use the adhesive PV-9098. The adhesive dries slowly, but the price is cheaper than the adhesive PV-9091, and the adhesive PV-9098 is in The glue machine is easy to use, and the glue on the paper is even and stable. After the bonding is completed, the leather shell is flattened with a flattening machine, and the surrounding edge is subjected to a foaming process with a foaming machine, so as to avoid unfavorable results such as weak bonding and generation of air bubbles. Before the flattening process, it is necessary to adjust the speed and pressure of the flattening machine. The pressure during flattening should not be too large. Excessive pressure will easily lead to the front of the cover being pressed out of glue. Generally, it is necessary to debug the flattening machine in advance, and select the appropriate pressure to flatten the leather case according to the performance of different products and adhesives. Adhesive PV-9091 is highly viscous and volatile. Because of its strong bonding strength, it is mostly used in the assembly process of the leather case. After the cover and the inner box are bonded, the foaming process is then carried out with a foaming machine. Under a certain pressure, the cover and the inner box are bonded more firmly.

     

 

     

3. Material deformation

    

3.1. Deformation of box cover industrial cardboard

     

        During the production and preparation of the box cover industrial cardboard, the relevant staff should determine the paper pattern of the industrial cardboard for cutting, and do a good job in the production imposition and quota review, so as to avoid the insufficient number of cutting materials after the gray board is cut. After cutting, it must be neatly placed on the card board, flattened on the industrial cardboard with a wooden board, and then wrapped with plastic wrap and placed in a constant temperature room to avoid sunlight.

  

    

        When feeding and cutting, pay attention to the direction of the paper grain of the industrial cardboard. The direction of the paper grain of the industrial cardboard determines the overall effect of the gift boxes forming to a certain extent. The longitudinal grain of industrial cardboard has a small deformation during use, and the amount of expansion and contraction during the use of the horizontal grain is large. In order to ensure the best presentation of the overall structural stiffness and appearance of the gift boxes, and to avoid local deformation of the gift boxes, which may cause the box cover to not be fully closed and the seal to be loose, the gray board is horizontally slotted in the gift box product proofing to make it. Form a cross grid with the vertical grain.

    

    

3.2. Deformation of the inner box industrial cardboard

     

        After the inner box is tape-packed, it needs to be neatly placed on a tray, flattened and wrapped with plastic wrap. After pasting, the inner box is pressed with a foam press to complete the foaming process, so that the paper and the gray board are firmly bonded to prevent the generation of air bubbles. Arrange it neatly on the tray again, flatten it and wrap it with plastic wrap to prevent deformation.

  

   

        When feeding and cutting, it is also necessary to pay attention to the direction of the paper grain of the industrial cardboard. The stiffness and deformation of the industrial cardboard after cutting from different paper grain directions are different. In general production and feeding, the long side of the inner box industrial cardboard is a horizontal paper pattern, which reduces the amount of deformation, and it is not easy to deform after bonding and laminating, and the molding effect is better.

  

    

        In short, when the gift boxes are produced in a constant temperature and humidity environment, there are still many uncontrollable factors that affect the smooth progress of the production. The staff of the Rophone packaging factory must pay attention to all aspects of product production to prevent problems before they occur. In the production of gift boxes products, it is necessary to confirm the die-cutting size, choose environmental protection glue, industrial cardboard and many other environmental protection practices, which can not only reduce unnecessary waste, reduce production costs, but also improve production efficiency and make high-quality products. Quality gift boxes product.