JPH0560776B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to labeling hollow blown articles.

[Conventional technology]

For example, when manufacturing hollow blown plastic articles such as containers, the label is held in one or more mold sections by vacuum so that as the parison is blown outwardly into the cavity, the label is removed from the article. Conventionally, it has been suggested that the material be attached to or adhered to.

The molds are provided in sets of separable molds in predetermined rows, and a plurality of magazines, one for each mold half, are arranged to supply the labels, and a plurality of cooperating pick-up devices are used to supply the labels. A feeding device is operative to remove labels from the magazine and feed them to one or both of the mold halves of each set.

U.S. patent application no.
As shown in US Pat. No. 4,363,6166, there are devices in which labels are sequentially removed from a label magazine and positioned in rows with spacing corresponding to the spacing of the mold sets. The labels are then simultaneously moved in a column from a first position to a second position within the open separable mold and are deposited within the mold. This device includes a magazine for supporting labels in a stack and an endless belt transport device located adjacent to the magazine. The belt is indexed at predetermined intervals corresponding to the spacing of the rows of molds. A label pick-up device removes the labels from the magazine and places them on the conveyor such that the spacing between the labels on the endless transfer conveyor corresponds to the spacing between the mold sets. Another label applicator simultaneously removes the labels from the endless transfer conveyor and feeds them between open separable molds.

When a label is to be cut from a roll of labels, the free end of the label has a tendency to move;
A problem arises when cutting the labels from the roll because the cut cannot be square. These conditions are exacerbated when labels are made of plastic.

U.S. patent application Ser. A method and apparatus for labeling the molds of plastic blow molding machines of the type in which the parisons are encapsulated by moving them toward and away from each other and the parisons are then blown against the cavity interface between the mold sections. In this case, the labels are sequentially removed from one or more magazines, the labels are placed on an endless conveyor that transports the labels to a position adjacent to the open mold, and The method consists of laterally transporting the label from a conveyor to a location inside the mold so that the mold closes around the plastic parison and adheres the label to the blown plastic bottle as the parison is blown.

The use of magazines inherently poses problems. These problems are the expense of the magazine, the need to replenish the magazine supply of labels, and the space required around the container forming machine. Furthermore, when plastic or foam labels are handled, they are difficult to stack and handle for installation in magazines. When cutting labels from the web and laminating them, it is difficult to ensure that they are properly aligned.

If the shape of the plastic or foam label is complex, the magazine will be even more complex. Once formed, the plastic or foam label must be handled as a batch or laminated;
These are not easy to handle.

[Problem to be solved by the invention]

The object of the invention is to eliminate the need for a label magazine, which can be used to apply labels on different materials such as paper, plastic and foam, and which can be applied to both sections of a separable mold. A row of labels can be provided between separate molds such that two labels can be supplied to each mold cavity, minimizing handling steps and reducing the possibility of label positioning errors in the row. The purpose is to provide a method for scrubbing.

[Means to solve the problem]

According to the present invention, the method forms labels on a roll of labels, sequentially die-cuts the labels from the web of the roll, and simultaneously feeds each label directly to an endless vacuum conveyor, which indexes the endless vacuum conveyor to form the Forming these rows of labels on a conveyor with spacing corresponding to the spacing of the rows of molds, locking the rows of labels on the conveyor and removing them from the conveyor, and placing the rows of labels on the rows of molds. It is characterized by being attached.

〔Example〕

The present invention will be further described below with reference to the accompanying drawings.

1-4, the present invention relates to blow molded plastic articles, such as containers, in which a label is applied to a set of mold sections and the mold sections are heated into a parison or preform. and heated, and the preform is blown outwardly against the mold sections to adhere or adhere the label to the blown article.

As shown in Figures 1-4, the present invention is shown for use in a method particularly applicable to blow molding equipment, the blow molding equipment comprising a wheel 10 mounted on a horizontally extending shaft and a frame ( (not shown), and a plurality of sets of molds are arranged around the wheel 10 in a circumferentially spaced relationship. Each set includes a pair of mold sections, with a first mold section 11 mounted on the hub and a second mold section 11 mounted on the hub.
The mold section 12 is mounted in radial alignment with the first mold section and the mold is opened and closed. Wheel 1 when the mold is open
As the 0 rotates, an extruder (not shown) feeds the parison between the open molds so that when the molds are closed, the parison can be blown to form a hollow article, such as a container. After blowing, remove the hollow article. For blow molding equipment, U.S. Patent No.
4523904 and 4549865, which are hereby incorporated by reference.

The apparatus is shown dispensing two labels, one for the cavity of each mold section 11, 12, and includes a base (not shown) supporting conveyors 17, 17a. Conveyor 17, 17
a open mold section 11,
12, and the associated label placement mechanisms 18 and 18a operate to remove the label and feed it to each mold section 11,12. No. 802,117, cited above, is incorporated herein by reference for further details of the conveyor and feed system.

According to the invention, the roll of printed labels 13,1
3a feeds the webs W and Wa vertically downward to rolls 14 and 14a, and then feeds them to rolls 15 and 15a.
Supply horizontally upwards. Die cut mechanism 1
6 and 16a die-cut the labels from the webs W and Wa and convey them to endless vacuum conveyors 17 and 17.
It functions to directly supply up to a. Web W,
Supply of Wa, operation of die cut mechanism and conveyor 1
Labels 7 and 17a are arranged at predetermined intervals on conveyors 17 and 17a in synchronization with each other, and these labels are sequentially fed to open mold sections 11 and 12. The label placement mechanism 18, 18a then operates to feed the label to the mold section.

In the embodiment shown in FIG. 5, the invention is applied to an apparatus comprising a plurality of sets of separable molds 20 in linear arrays (ie, in parallel relationship). The extruder is coupled to each set of molds and the head is moved downward to accommodate the end of the extrusion tube in the neck mold at the head, which is then inserted into the preform or mold section between the mold sections 21. Pull upward to the parison position. The mold section 21 is then closed and the article is blown within the confines of the mold to the desired shape. If a label is to be applied, the head supports a label applicator 23, as described below, to feed the label into the mold section. If only one label is to be applied, a single applicator is provided for each set of molds. For details of an apparatus for removing labels from a conveyor and depositing them in a mold, reference is made to the above-mentioned US Pat. No. 4,636,166, which is incorporated herein by reference.

In the apparatus shown in FIG.
5a is a web with a label printed on the top side
Wb and Wc are supplied downward adjacent to the endless decompression conveyors 17 and 17a, and here the squid cut mechanism 1
6, 16a cut the labels and feed them sequentially to conveyors 17, 17a, which are then indexed in time to form a queue. after that,
A feed mechanism removes the labels from the conveyor and deposits them simultaneously onto the rows of mold sections.

FIG. 6 shows a typical die-cutting mechanism that may be used, which includes a frame 30 and supports a die 31 having an opening 32, the cutting edge corresponding to the shape of the label L to be cut from the web. . Punch 33 cooperates with die 32 to cut out the label. The punch 33 is supported by a plate 34 that is moved by a piston of a large cylinder 35. The stripper plate 36 is attached to a plurality of shafts 37, and is pressed downward by a spring 38 interposed between the plate 34 and the stripper plate 36 to fix the web when cutting the label. .

[Brief explanation of the drawing]

1 is a schematic partial perspective view of an apparatus for carrying out the method of the invention, FIG. 2 is a partial plan view taken in the direction of arrow 2 in FIG. 1, and FIG. 4 is a front view of FIG. 2, FIG. 5 is a schematic diagram of the apparatus for carrying out the modified method, and FIG. 6 is a die-cutting apparatus used in this method. FIG. 10...Wheel, 11...First mold section, 12...Second mold section, 14, 14a
...Roll, 15,15a...Roll, 16,1
6a...Die cut mechanism, 17, 17a...Conveyor, 18, 18a...Label installation mechanism, ie, label adhesion mechanism, 20...Separable mold, 2
5,25a...roll.

Claims (1)

Claims: 1. Positioning a label in each of a plurality of spaced apart separable molds in a predetermined row, positioning a preform in each set of separable molds, and closing the molds. In the method for manufacturing a hollow plastic article, the preform is blown outward against the boundary of the mold to obtain a label on the hollow plastic article, forming a label on a roll of labels, and forming a label on a roll of labels; The labels are sequentially die-cut from the web, and at the same time each label is fed directly to an endless vacuum conveyor, and the endless vacuum conveyor is indexed to form rows of labels on the conveyor with spacing corresponding to the spacing between the rows of molds. A method for manufacturing hollow plastic articles, comprising: locking the rows of labels on a conveyor and removing them from the conveyor; and applying the rows of labels to one section of the rows of molds. 2 forming a label on a second roll of labels;
Labels are sequentially die-cut from the web of the second roll, and at the same time each label is fed directly to a second endless vacuum conveyor, which is indexed to create a spacing corresponding to the spacing between the rows of dies. forming a row of labels on a second conveyor having a second conveyor, locking the row of labels to the second conveyor and removing them from the second conveyor, and depositing the row of labels on another section of the row of molds. 2. The method of claim 1, comprising the steps of: 3. The method of claim 1, wherein the mold sections are moved in a closed passage and the mold sections are moved radially relative to each other. 4. Positioning a label in each of a plurality of spaced apart separable molds in a predetermined row, positioning a preform in each set of separable molds, and closing the molds and removing the preform. An apparatus for manufacturing a hollow plastic article in which a label is applied to the hollow plastic article by blowing outward against the boundary of a mold, comprising means for supporting a label against a roll of labels, an endless conveyor, and a means for supporting a label against a roll of labels; a die mechanism for sequentially die-cutting labels from a web and simultaneously supplying each label directly to an endless vacuum conveyor; and a die mechanism for indexing the endless vacuum conveyor to the conveyor having intervals corresponding to intervals between rows of molds. means for forming the row of labels; means for locking the row of labels on and removing the row from the conveyor; and means for depositing the row of labels on a section of the row of molds. Equipment for manufacturing hollow plastic articles. 5 a second means for supporting labels on a roll of labels; a second endless conveyor; a second means for sequentially die-cutting labels from the web of the second roll and simultaneously supplying each label directly to said second endless vacuum conveyor; a die mechanism; a second means for indexing the second endless vacuum conveyor to form a row of labels on the second conveyor having a spacing corresponding to a spacing of the rows of molds; a second conveyor for locking rows of labels and removing them from said second conveyor;
5. The apparatus of claim 4, further comprising: means and second means for applying the row of labels to the other section of the row of molds.