JP2000168706A - Apparatus and method for putting preform in container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow preforms to be contacted with one another only at the time of falling and to decrease the number of occurrence of cracks with the cracks prevented from occurring at opened-top parts of the preforms by providing a conveyance means which catches the preforms and carries them to a specified position and after that releases chucks from their state of holding. SOLUTION: Preforms 9 molded in one process of molding by an injection molding machine are respectively put, with their opend-top parts looking downward, on and supported with each of pins 2 of a pin tray 1 provided at the upside of a conveyance means 3. Then the preforms are moved, while being held under such condition, in the horizontal direction by the conveyance means 3. After stopping, the preforms 9 are lifted up and held individually with chucks 5 with their opend-top parts turned up to look upward and after that, the preforms 9 are moved, being caught by a transfer means 6, to a specified position, and the preforms are encased with the state of being caught released. Therefore, the preforms 9 in a great number can be encased in a container 7 withoutn requiring levelling by manual operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for injecting a preform, which is a preform of a resin bottle such as PET, into a container after injection molding, and a method for charging the same.

[0002]

2. Description of the Related Art A preform is formed by an injection molding machine.
After the preform is taken out, it passes through a predetermined transport path and is finally put into a container and packed in a box. Conventionally, as a method of putting a preform into a container, a method of dropping the preform naturally and packing it in a box from a certain height above the container has been used. However, in this method, since the preform itself is not held at the time of loading, the preform may fall downward in the mouth portion, in which case the mouth portion is easily scratched, and the defective product may be defective. Could be. In addition, since the drop between the preform input position and the container is large, damage may occur due to contact between the preforms.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, and by packing the preform in a box while holding the preform, the preform lip is not damaged. Another object of the present invention is to reduce the number of scratches by contacting the preforms only once when the preforms fall.

[0004]

An apparatus for feeding a preform into a container for solving the above problem receives a preform molded in one step by an injection molding machine in a state where a mouth portion is directed downward. Pin tray means for individually supporting the preforms, transport means for moving the preforms in the horizontal direction while supporting the preforms, and after holding the preforms by the chuck portion, turning the lips upward at least until they move onto the container And a transfer means for holding the preform, transferring it to a predetermined position, lowering it, and then releasing the holding state of the chuck portion. . Further, the method of charging a preform into a container according to the present invention is such that the preform molded in one step by an injection molding machine is put on pins of a pin tray provided on a conveying means in a state where a mouth portion is directed downward. To support,
A container to be moved in the horizontal direction while maintaining the state by the transporting means, and after stopping, the preforms are individually lifted and held by the chuck portion, and the lip portion is turned upside down. The preform is moved to a specific position, the gripping state of the preform is released, and the preform is packed in a box.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an outline of the present invention, which will be described with reference to this drawing. In the figure, 1 indicates a pin tray, 4 indicates a reversing means, and 6 indicates a transfer means. First, an injection molding machine (typically, 48 or 9) which does not show a preform which is a preformed product of a resin bottle such as PET is shown.
6 sections. This forms 48,98 preforms in one step, respectively), and then is removed from the mold. At this time, the preforms are in a state of being aligned and facing downward at the mouth. The preform 9 is received and supported in a state of covering each pin 2 of the pin tray 1 on the conveyor 3 which is a conveying means as shown in FIG. The pin tray 1 is carried to a specific position by the horizontal movement of the conveyor 3 (moved from left to right in the drawing), and the state shown in FIG. 3 is obtained.
After that, the reversing means 4 having the chuck portion 5 at the front end waiting at the upper position comes down, and the preform 9
Is lifted upward and held by the chuck portion 5 by vacuum. Then, with the preform 9 held,
Rotate by 80 degrees (moved along the dashed double-dotted trajectory in the drawing)
As a result, the mouth portion of the preform faces upward. Further, the preform 9 is grasped from both directions by a support ring or a step portion under the same by a pair of sandwiching portions 10 provided in the transfer means 6 shown in FIG. 4 (the drawing shows a case of 96 sections). Here the pinch part 1
Numerals 0 each form a pair structure integrally holding the preforms 9 in the same row as shown in FIG. Thereafter, the transfer means 6 moves to a position above the container 7, and is lowered from that position to temporarily stop the movement at a preset position. The stop position is set so as to be gradually higher depending on the degree of accumulation of the preform. Thereafter, the gripping state of the chuck portion 5 is released, and the preform 9 is placed in the container 7.
And this step is repeated. If it is necessary to discard the preform 9 being conveyed, it is set in advance to stop the lateral movement at the upper part of the defective discharge unit 8, and then descend, release the holding state of the chuck unit and discard it. You can also. When the holding state of the sandwiching portion 10 is released and the preform 9 is put into the container 7, the plane size is adjusted to the size of the container 7 so that the degree of accumulation of the preform 9 in the container 7 is uniform ( Flat).
Thereby, many preforms 9 can be packed in the container 7 without manually leveling the mountain. As shown in FIG. 6 (a), in the case of 96 sections, 6 rows × 8 rows are arranged in the pin tray 1 separately with a dimension A at the same pitch as the mold. After the size A is inverted, it is reduced (in FIG. 3, the width of the lifting portion 11a corresponds to the size A, and the lifting portions 11a and the lifting portions 11b approach each other after the inversion). The rows × 2 have the same pitch, and the preform can be more uniformly packed in the container 7. In the case of 48 sections, they are arranged in 4 rows × 12 rows as shown in FIG. 6B, and there is no A dimension as in the above 96 sections. However, the number of rows is smaller than in the case of 96 sections, and the dimensions are
Since the size of the preform is smaller than the size of the preform, the preform is put into the container 7 at a plurality of positions (for example, four places at each of the four corners), and the positions are repeated and the order is changed. I try not to be.

[0006]

As described above, according to the preform feeding apparatus and method of the present invention, since the preforms are transferred to the final position in an aligned state, the occurrence of scratches due to contact between the preforms is eliminated. By holding the preform and packing it in a state in which the lip portion faces upward, the lip portion of the preform is not damaged, and the contact between the preforms is reduced to one when the preform falls.
Since it is only the number of times, it can be expected that the number of scratches generated will decrease. Therefore, the present invention has high value as a preform charging device and a charging method which have eliminated the problems of the related art, and greatly contributes to the industry.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of the present invention.

FIG. 2 is a partially enlarged view showing a pin tray.

FIG. 3 is a partially enlarged view showing a preform conveyed by a pin tray and a reversing unit.

FIG. 4 is a front view showing the transfer means in the case of 96 sections.

FIG. 5 is a side view showing the transfer means in the case of 96 sections.

FIG. 6 (a) In the case of 96 sections and (b) 48
FIG. 9 is a diagram showing an alignment state of preforms in an initial stage in the case of a section.

[Explanation of symbols]

1 Pin Tray 6 Transfer Means 2 Pin 7 Container 3 Conveyor 8 Defective Ejection Unit 4 Inversion Means 9 Preform 5 Chuck Unit

Claims (2)

[Claims] 1. A preform molded in one step by an injection molding machine is received in a state where a mouth portion is directed downward, and pin tray means for individually supporting the preforms, and are horizontally moved while supporting the preforms. Conveying means, after holding the preform by the chuck unit, preform reversing means for rotating the lip portion upward at least until moving on the container, and further grip the preform and transfer it to a predetermined position, An apparatus for feeding a preform into a container, the apparatus comprising: a lowering unit; and a transfer unit that releases the holding state of the chuck unit after that. 2. A preform molded in one step by an injection molding machine is supported so as to cover pins of a pin tray provided on a conveying means in a state where a mouth portion is directed downward, and the state is maintained by the conveying means. While holding the preform individually by the chuck unit after stopping and holding the preform upside down, and then moving to a specific position of the container where the preform is gripped and inserted. A method of charging a preform into a container, wherein the gripping state of the preform is released and packed in a box.