Bottle labelling machine

Figure 57 Bottle labelling machine - on the right, glueing roller in the center, a gripper system grip the labels on their back after adhesive application.

The bottles are inspected for fill-height and then are conveyed to the labeller (Fig. 20.29). Bottle labels are made of (/) sized machine-coated paper, ( ) wet-strength paper, Hi) foil, or (/v) metallized paper. The first is cheapest and the range of grades is 70-85 g/m. Wet-strength paper is paper treated with either melamine-formaldehyde or urea-formaldehyde resins. Compared with the machine-coated paper it is marginally more expensive and is less likely to be pulped in modern bottle washers. Aluminium foil is 4-5-fold more expensive... 

Modern automatic high-performance labeling machines are capable of labeling between 500 and 1300 bottles per minute. At lower speeds, starch glues, which do not show such pronounced pick-up properties, are still used because of their lower cost. However, their higher water resistance can cause problems in bottle-washing machines for returnable bottles. 

Ice water label paste is a very specialized water-based casein adhesive which is used primarily to adhere paper labels to beer bottles. The labels must remain attached if the bottles are chilled in ice or otherwise subjected to wet conditions, but they must wash off reusable bottles easily with hot water. Casein is dispersed with urea at an approximate 50 50 ratio in the presence of ammonium hydroxide as an additional dispersant. The high percent casein solids in this type formulation is possible because of the urea, which acts as a viscosity reducer. The urea, sometimes along with ammonium thiocyanate, functions also as a gel depressant. Zinc oxide and zinc acetate are used to crosslink and provide water resistance. A defoamer and a preservative are always included. Starch is one of several agents incorporated to shorten the thread of the adhesive to improve its performance on high speed labelling machines. 

The machine called Pet Pope made the collection, bottles labels separation, lids separation and grinding of raw materials, making a difference in the company. While the mold was machined. Pope Pet machine remained at the construction site of the company storing all the raw material. 

A principal plastic reclaiming process used was developed in the Netherlands by a resin manufacturing firm. In this process, after removal of labels and base cups by machine, the bottles (clear or green) are color sorted and granulated. The PET flake is then washed to remove glue. Closure material is separated by flotation from Hie PET. The remaining PET is dried and sifted for fines and then is ready for reuse. 

The bottle exits the filler and enters the corker where it is corked with a natural cork that has been exposed to a high SO2 content atmosphere prior to being fed to the corking machine. In the corker, as the bottle is put into place, a vacuum is drawn of approximately twenty-seven inches (680 mm) of mercury on the bottle headspace. The cork then is inserted into the neck of the bottle against this partial vacuum. The bottle leaves the enclosed room, a foil is placed on the neck, it is labeled, cased, and stored neck down until ready for release by the winery. 

The desired bottles then proceed to the grinder and the washing machine. The ground plastic is washed to remove product and labels. The paper labels sink and the HD PE is floated off the top and conveyed to a drier. Contaminants such as glass and metals also sink and are discarded with the paper labels. After the material is dry, it can be boxed or extruded and pelletized. Color or additives can be added to the resin prior to extrusion if necessary. 

Machine vision, also referred to as computer or robot vision, is a term that describes the many techniques by which machines visually sense the physical world. These techniques, used primarily for monitoring industrial manufacturing, are becoming increasingly popular as today s manufacturing environments become more automated and quality control standards increase. Whether the task is to sort and assemble a group of machined parts, to determine if a label has been placed properly on a soda bottle, or to check for microscopic defects in an automotive door panel, machine vision plays an essential role. 

The purpose of dry separation is the removal of a part in the dry phase. The process allows avoiding problems of dissolution in water and relevant contamination. An air flotation method is used for dry separation. Specially designed machines combining the effects of vibration and air flotation ensure separation of flakes with different specific weight. Such machines are very usefiil for removal of parts of labels that were freed by grounding. An extremely interesting application of this method is the separation of PVC labels from PET bottle flakes. 

The process for the recycling of most plastics is simple, with separation of the desired plastics from other contaminants the most labor-intensive step. PET soft drink bottles, for example, usually have a paper label, adhesive, and an aluminum cap that must be removed before the PET can be reused. The recycling process begins with hand or machine sorting, after which the bottles are shredded into small chips. An air cyclone removes paper and other lightweight materials, and any remaining labels and adhesives are eliminated with a detergent wash. The PET chips are then dried, and aluminum, the final contaminant, is removed electrostatically. The PET produced... 

STEP r. First you will need some plastics strips 3" to 4" long and 1/4" to 3/8" wide to feed the machine. The strips can be cut from a plastic milk bottle, oil can, soda bottle or other thermoplastic bottle or item. All plastic must be rinsed off and dried before putting it in the machine. No residue of any kind should be on the plastic when it is placed in the machine. Also remove any paper labels that may be on the plastic. For obvious reasons do not use bottles, containers or plastic items that have contained chemicals, insecticides or other harmfiil agents in your projects. 

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