JPH0535058B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for blow molding plastic containers, and in particular to an apparatus for blow molding plastic containers, and in particular for moving a label into position in a mold and blow molding the label before molding the container. It relates to a device for placing in a mold and removing a blow-molded container together with a label applied thereon.

Prior Art In the blow molding of plastic containers, it is known to add a label to the final blow mold so that when the hollow plastic product is blow molded, the label is It becomes positioned on a blow molded product such as a container.

However, in one type of method and apparatus for blow molding hollow plastic articles, such as containers, the configuration of the apparatus is
This configuration poses significant difficulties in adding or positioning labels within the halves.
U.S. Patent Nos. 3,767,747, 3,781,395 and
Please refer to No. 3978184. In such blow molding equipment, a freely pendant tube is extruded vertically downward and a separate preform mold and final blow mold are movable horizontally toward an orifice. Move away from the orifice. Also, in such blow molding equipment, access of the labeling device to the upper and lower regions of the mold and access of the labeling device to one side of the mold is not easily possible. .

The main object of the present invention is to provide a device configured so that labels can be applied and, in addition, blow-molded containers can be removed by means of horizontal movement.

Arrangement of the Invention According to the present invention, the label can be manufactured by blow molding.
apparatus is provided for adding a blow-molded container to a mold and removing the blow-molded container along with a label on the container from a blow-molding apparatus, the blow-molding apparatus having an upper or lower end of the mold. A blow molding device configured to exclude the access of a labeling device, said device according to the invention comprising a carriage.
The movable table is capable of reciprocating horizontally between a position outside the blow mold and a position inside the blow mold. The moving table is a pick-up head.
The head takes a label from a magazine, guides the label between the mold halves, and positions the label on the mold halves. The carriage further supports a container removal device that engages the blow-molded container with a label on the container and removes the container and label from the mold half. Remove from position between body parts.

More particularly, the present invention provides a method in which a mold half forming a mold moves between an open position and a closed position, defines the shape of a recess in the mold in the closed position, and a blow molding device configured to exclude access of a labeling device to the upper or lower end of the mold, and in which a plastic parison is molded in the mold by a blow molding operation to produce a hollow plastic molded container; Among the molding apparatuses, an apparatus for applying labels, having a movable table; having means for supporting the movable table so that the movable table can reciprocate in the axial direction; The movable table is moved horizontally between a first position outside the mold halves and a second position between the mold halves of the blow molds when the blow molds are opened. having means for reciprocating; having a first label magazine at the first position; having a first label take-out device; moving the first label take-out device in a direction transverse to the moving direction of the moving table; means for supporting the first label retrieval device on the carriage so that the first label retrieval unit can be mounted on the carriage when the carriage is in the first position near the label magazine; the label is removed by moving the label laterally outward; and when the moving stage is in the second position, the first label removing device carrying the label is moved laterally outward to form an open state; means on the movable stage for feeding the label into the cavity of the mold; a first container removal device having a gripping member for engaging a first blow-molded container made in said mold; having; the first
a first container removing device for moving the container removing device, i.e. so that the first container removing device can be moved towards and away from the axis of the direction of movement of the moving platform; means for supporting the label on the movable stage; when the movable stage is in the second position, before feeding the label to the open mold;
The gripping members of the first container removing device move inward relative to each other with respect to the position of the container to grip the first blow-molded container, and after the moving table moves to the first position, the first blow-molded container is removed. is removed from the open mold, then another parison is fed into the labeled open mold, the mold is closed, and the parison of said another container is then removed during mold closure. A label, characterized in that it has means on the moving platform for moving the gripping members of the first container removal device outwardly and inwardly with respect to the container position relative to each other so as to allow a blow molding operation. This relates to a device that adds .

Referring to FIG. 1, the present invention comprises preform mold halves 20 and final blow mold halves 2.
1, the half of which is laterally or horizontally translatable from a position below an extruder, the extruder being constructed as described in U.S. Pat. No. 3,767,747. No. 3,781,395 and No. 3,978,184, freely extruded tubular parisons
form a parison). In such blow molding equipment, as seen in Figure 1, the conventional labeling equipment is removable, but the labeling equipment can be accessed from the top, bottom, or left side. Therefore, such conventional labeling equipment cannot be easily used.

According to the invention, a carriage 22 is mounted on a track defined by longitudinally spaced rollers 23, and the carriage 22 is blow-molded. It is horizontally movable between a position outside the mold 21 and a position inside the blow mold. When the carriage 22 is moved, the label is removed from the magazine M and guided to a position between the mold halves 21. In addition to this, blow molded pipes (blow molded pipes)
The preformed containers, supported by pipes), are preferably removed by means of a device on the carriage 22, and at the same time as the carriage returns to a position outside the mold, the preformed containers are placed on the horizontal conveyor 25. be guided to.

Referring to FIG. 3, the moving platform 22 includes a top plate 26 and a side plate 27, the plates 27 supporting longitudinally extending members guide bars 28, 29, and supporting the moving platform 22. For guidance, the guide bar engages grooves in opposing upper and lower pairs of rollers 23. The moving table 22 further includes a pick-up device (pick-up device).
Each of the ejection devices is in the form of a bar 30 supporting a vacuum cup 31. Each bar 30 is pivotally mounted on a lever 32 which is pivotally mounted on the carriage 22 midway between its ends. Air cylinder 33 connects each plate 27
and the air cylinder has a piston pivotally mounted to the upper end of each lever 32.

At the same time the carriage is moved to a position adjacent to the magazines M, which are illustrated in this application as two magazines on each side for feeding the two cavities of the mold, the pistons 33
is actuated to move an ejector 30 with a vacuum cup 31 into position to engage the label and remove the label from each magazine M.

The carriage 22 is moved longitudinally by a motor 34 which has a pinion 35 on its shaft which engages a rack 36 on the carriage. When the motor 34 is energized, the carriage 22 moves, moving the pick-up device with the label into position within the mold half. After that, cylinder 33
is actuated to move and deliver the label into the mold cavity where vacuum holes in the mold hold the label in place until the product or container is blown. do.

After the mold halves are opened, a gripping device on the carriage engages and functions to hold the container;
A blow pipe then removes the container from the blow tip. As shown in FIG. 3, the grasping device includes a grasping member 37 pivotally mounted on an arm 38.
is fixed on the shaft 38a and has an extension 39, which extends over the shaft 38a.
a and is actuated by a shaft 40 which engages a lever 41 which is pivotally connected to a fixed frame 41 and the shaft of a piston motor 42, The motor 42 is pivotally mounted on the frame,
In order to grasp the container, the gripping members 37 are moved towards each other and away from each other.

Therefore, when the carriage 22 reciprocates, it first takes out a label from the magazine M, then moves to a position inside the mold and stops, guiding the label (into the mold) and removing the container. Take it out. In the return movement of the moving table 22, the container is transferred to the conveyor 25.
and in the next cycle (another label) is removed and guided into position inside the blow mold.

During operation, the mobile platform 22 and its associated parts are
They have a relative relationship as schematically shown in Figures A and 6B. As shown in FIG. 6A, gripping member 37 has removed the blow molded container at position 1 and the label is ready for insertion into blow mold 21. As shown in FIG. As shown in Figure 6B,
Movement of the carriage 22 causes the gripping members 37 and the label removal device or bar 30 to be retracted from the open mold position, the preform or parison is moved between the molds 21, and the molded container is moved onto the conveyor. and the label is removed from the magazine M.

In the embodiment shown in Figures 7-9, instead of the container removal device including the gripping member 37 described above, an inflatable diaphragm 50 for gripping the container is used.
A container removal device is used which includes as a gripping member.

Although the invention has been described in connection with multiple label magazines, it is also possible to use a single label magazine. Although the present invention has been described as being preferably used with the removal of a shaped container, the removal of the container itself can be accomplished by other removal methods.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional plan view of an apparatus embodying the invention, with a portion broken away. Second
The figure is a cutaway sectional view taken along line 2-2 in FIG. 1. FIG. 3 is a cutaway cross-sectional view taken along line 3--3 in FIG. FIG. 4 is a cutaway sectional view taken along line 4--4 in FIG. 3. 5 is an enlarged dimensional cutaway plan view of a portion of the apparatus shown in FIG. 4; FIG. 6th A
Figures 6B and 6B are schematic illustrations showing the various steps in adding the label and removing the container. FIG. 7 is a longitudinal sectional view similar to FIG. 3 to illustrate another embodiment of the device. FIG. 8 is a cutaway plan view of the device in FIG. 7. FIG. 9 is a cutaway cross-sectional view taken along line 9--9 in FIG. 7. 20... Preform mold half part, 21... Final blow mold half part, 22... Moving table, 23... Roller, 2
5... Conveyor, 26, 27... Plate, 28, 2
9... Guide bar, 30... Bar, 31... Vacuum cup, 32, 42... Lever, 33... Air cylinder,
34, 42...Motor, 35...Pinion, 36...Rack, 37...Gripping member, 38...Arm, 38a,
40...shaft, 39...extension part, M...magazine.

Claims (1)

[Scope of Claims] 1. A mold half constituting a mold for molding moves between an open position and a closed position, defines the shape of the recess of the mold in the closed position, and defines the shape of the mold half in the closed position. A blow molding device configured to eliminate access of a labeling device to either the upper end or the lower end and for forming a plastic parison in the mold by a blow molding operation to produce a hollow plastic molded container. An apparatus for applying a label, comprising: a movable base; means for supporting the movable base so that the movable base can be reciprocated in an axial direction; a mold half of a blow molding mold; horizontally reciprocating the carriage between a first position external to the body and a second position between the mold halves of the blow mold when the blow mold is opened; a first label magazine at the first position; a first label take-out device; and a means for moving the first label take-out device in a direction transverse to the moving direction of the moving table. further comprising means for supporting the first label retrieval device on the movable table; when the movable table is in the first position near the label magazine, the first label retrieval device is laterally supported. and when the moving table is in the second position, the first label ejecting device carrying the label is moved laterally outward to remove the label from the mold in the open state. means on the carriage for feeding the label into the recess; and a first container removal device having a gripping member for engaging a first blow-molded container made in said mold. ; the first in a direction transverse to the moving direction of the moving table
a first container removing device for moving the container removing device, i.e. so that the first container removing device can be moved towards and away from the axis of the direction of movement of the moving platform; means for supporting the label on the movable stage; when the movable stage is in the second position, before feeding the label to the open mold;
The gripping members of the first container removing device move inward relative to each other with respect to the position of the container to grip the first blow-molded container, and after the moving table moves to the first position, the first blow-molded container is removed. is removed from the open mold, then another parison is fed into the labeled open mold, the mold is closed, and the parison of said another container is then removed during mold closure. A label, characterized in that it has means on the moving platform for moving the gripping members of the first container removal device outwardly and inwardly with respect to the container position relative to each other so as to allow a blow molding operation. A device that adds 2 The means for supporting the first label retrieval device comprises:
a longitudinally extending member mounted on the movable table and swinging in a direction transverse to the longitudinal axis of the member; an arm fixed to the member; and a first label supported by the arm. 2. The device according to claim 1, comprising: a take-out device; and means for swinging said member. 3. The apparatus according to claim 2, wherein the means for causing the first label take-out device to swing motion includes a fluid motor. 4. The container removal device has a longitudinally extending member for supporting the gripping member, the longitudinally extending member being placed on a moving platform and the longitudinally extending member rocking movement about a longitudinal axis, the rocking movement of the longitudinally extending member laterally moving the gripping member to engage and engage the gripping member with the first blow-molded container; Claim 1 configured to release
Apparatus described in section. 5. The gripping member includes an air-expandable gripping member that engages with the first blow-molded container to hold the container in the open mold when the movable table is in the second position. 2. A device according to claim 1, adapted for removal from within. 6 having a second magazine at a position spaced apart in the longitudinal direction from the position of the first magazine; having a second label take-out device; having the second label take-out device movable in a direction transverse to the moving direction of the moving table; means for supporting the first magazine and the second magazine in the longitudinal direction on the movable table, and the second label take-out device
located at a distance in the longitudinal direction from the first label retrieval device by a distance corresponding to the distance between the movable stage and the magazine; 2. moving a label pick-up device laterally outward to pick up the label; and when the moving stage is in a second position, moving the second label pick-up device carrying a label laterally outward; Apparatus according to claim 1, further comprising means on the movable table for moving a second label removal device so that the label can be fed into the second recess of the mold in an open state. . 7. a second container removal device comprising a gripping member for engaging and gripping a second blow-molded container made in a mold having a second recess; moving the carriage; so that the second container removal device can be moved in a direction transverse to the direction, i.e. the second container removal device can be moved towards and away from the axis of the direction of movement of the carriage; means for supporting the second container removal device on the carriage, when the carriage is in the second position, the gripping member of the second container removal device prior to feeding the label into the open mold; are moved inwardly relative to each other with respect to the position of the container to grip the second blow-molded container, and after the moving table is moved to the first position, the first and second blow-molded containers are molded in an open state. removing from the mold, then feeding another pair of parisons into the recesses of the open mold having a label in each recess and closing the open mold;
means for moving the gripping members of said second container removal device outwardly and inwardly relative to the container position with respect to each other so that said blow molding operation of said another pair of containers can be carried out after closure of the mold; 7. The apparatus according to claim 6, further comprising: on said movable table. 8 A second magazine is provided at a second position facing the first magazine; a second label ejecting device is provided; the first label is ejected by a distance corresponding to the distance between the first magazine and the second magazine in the longitudinal direction; means for supporting a second label retrieval device located longitudinally remote from the device; supporting a label retrieval device; when the movable stage is in a first position near the second label magazine, the first label retrieval device and the second label retrieval device are connected to the first mentioned first label retrieval device; retrieving the second label by laterally moving the second label outwardly from each other in a direction opposite to the direction of movement of the second label retrieval device carrying the label when the carriage is in the second position. Claims further comprising means on the movable platform for moving the first label ejecting device and the second label ejecting device so that the labels can be fed into the recesses of the mold in the open state. The device according to scope 1. 9 The means for supporting the second label take-out device comprises:
a longitudinally extending member mounted on the movable table and swinging in a direction transverse to the longitudinal axis; a pair of arms fixed to the member; and a second member supported by the arms. 9. The apparatus according to claim 8, comprising: a label take-out device; and means for swinging said member. 10 The second container removal device includes a longitudinally extending member supporting a gripping member and mounted on a carriage for rocking movement, the second container dispensing device comprising a longitudinally extending member supporting a gripping member and mounted on a carriage for rocking movement; 8. The apparatus of claim 7, wherein the gripping member is moved laterally into engagement and disengagement with the second blow molded container by a rocking movement about an axis of direction. . 11. The gripping member includes an air-expandable gripping member, the gripping member engaging the second blow-molded container when the movable platform is in the second position;
8. Apparatus according to claim 7, adapted to remove the second blow mold container from the open mold.