JP2003011944A - Bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottle having an improved printing register which eliminates the fluctuation of a printing position by always accurately positioning the bottom part of the bottle in printing and which does not generate a scratch by a mold in opening and releasing the mold in molding. SOLUTION: This bottle has a recess extending in a direction crossing at right angles with a parting line on its bottom part. The wall face in the short axis direction side of the recess is 70 deg. or more but less than 90 deg..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a register for bottles, particularly rigid bottles.

[0002]

The oval bottle printing register extends along the parting line, with the longitudinal axis of the register being located on the parting line. When the mold is opened during molding, the bottom of the bottle is lifted by the register molding part of the mold, and the molded bottle is pinched between the shoulder molding part and the bottom molding part of the mold,
There is a possibility that the shoulder area, the upper part or the bottom of the body part may be deformed, and the deformation may not be restored and remain as it is. In addition, when the inclination angle of the wall surface on the minor axis side is large, there is a problem that it works to separate the parting line and scratches remain.

In order to prevent this, if the inclination angle of the wall surface on the minor axis side of the register is made small or the depth is made shallow, there is rattling between the bottle and the printing holder during alignment during printing. However, there is a problem in that the printing position varies.

In consideration of the above problems, the present invention eliminates the occurrence of scratches due to the mold at the time of opening the mold at the time of molding, and at the same time, the bottom of the bottle is always accurately aligned at the time of printing so that the printing position can be improved. It is an object of the present invention to eliminate variation and to provide a bottle provided with an improved printing register.

[0005]

In order to solve the above problems, the present invention is characterized in that, as a bottle, a recess is provided at the bottom of the bottle so as to extend in a direction orthogonal to the parting line. The configuration is adopted, and as a specific embodiment, a configuration is adopted in which the wall surface on the minor axis direction side of the recess is 70 ° or more and less than 90 °.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. 1 to 3, a bottle A is a bottle molded by direct blow using a hard synthetic resin such as PP or PET, and has a mouth portion 1
And a shoulder portion 2, a body portion 3 and a bottom portion 4.

A screw 5 is engraved on the outer periphery of the mouth portion 1, and a step portion 6 is provided below the screw 5, and the step portion 6 continues to the shoulder portion 2. The body portion 3 has an elliptical cross section and is gradually reduced in diameter toward the bottom portion 4. The cross-sectional shape of the body portion 3 may be an elliptical shape, a circular shape or a rectangular shape with rounded corners, or a flat shape such as a track elliptical shape formed by opposing arcs and straight lines.

As shown in FIG. 2, the bottom portion 4 has a bottom end wall 7 and a flat bottom wall 8, and the flat bottom wall 8 has a printing register extending in a direction orthogonal to the parting line PL. 9 are provided.

The register 9 is a longitudinal side end formed by slanted wall surfaces 11a, 11b having an arcuate cross section connecting the ends of the wall surfaces 10a, 10b with a straight portion formed by facing substantially vertical wall surfaces 10a, 10b. And the bottom wall 12.
The inclination angles α of the wall surfaces 10a and 10b can be 70 ° or more and less than 90 °, and the inclination angle β of the end portions of the wall surfaces 11a and 11b can be 30 to 40 °. In the embodiment shown in FIGS. Is 80
° and β are 30 °.

Next, the function and effect of the blow molding of the bottle and the opening of the mold will be described. In FIG. 4, B is a blow mold, which is composed of split molds 20a and 20b, and includes a mouth molding portion 21a, a shoulder molding portion 21b, a body molding portion 21c, and a bottom molding portion 21d corresponding to the bottle A. Has become. The bottom molding portion 21d includes a molding portion of the bottom end wall 7 and the flat bottom wall 8 of the bottle A, and a projection portion 23 including a straight portion for forming the register 9 and long side end portions 22a and 22b having an arc-shaped cross section. It has.

Blow molding is performed by a known method,
When the mold is opened, the longitudinal end portions 22a and 22b are gently inclined, so that the bottom portion 4 of the bottle A gradually rises, and at this time, it is deformed around the shoulder portion 2 of the bottle A and above the body portion 3. However, the deformation is performed relatively gently and reasonably, and when the mouth molding portion 21a is separated from the bottle mouth portion 1, the deformation of the shoulder portion 2 and the body portion 3 is restored, and the bottle as the mold is molded. .

Further, since the wall surface of the straight portion of the protruding portion 23 is orthogonal to the parting line PL, the mold can be easily opened.

Next, the bottle holder and the function and effect at the time of printing will be described. As shown in FIG. 5, the bottle holder C
Is composed of a side peripheral wall 30 and a bottom wall 31, and the side peripheral wall 3
0 has a high holding surface 32 that surrounds the bottom end wall 7 of the bottom portion 4 of the bottle A to a certain height, and a low holding surface 33 that corresponds to the printing surface.

The bottom wall 31 is provided with an alignment ridge 34 which fits into the register 9 of the bottle A. The alignment ridge 34 corresponds to the shape of the register 9 and has an inclination angle α of approximately. It is provided with an equal straight line portion 35, an inclined surface 36 having an inclination angle β having an arcuate cross-section corresponding to the longitudinal end portion, and a top wall 37. As is well known, a printing chuck device for the bottle A is formed by a bottle holder C and a pressing member (not shown) that holds the mouth portion 1 of the bottle A, and the bottle holder C is aligned with the register 9 of the bottle A. The ridge 34 is fitted and printing is performed on the bottle surface in synchronization with the rotation of the printing machine.

When the bottle A is fastened to the chuck device,
Like the wall surface 10 of the straight line portion of the bottle bottom portion 4, the straight line portion 35 of the alignment protrusion 34 is almost vertical, that is, the inclination angle α is 70 ° or more and less than 90 °. It becomes accurate, and it is possible to accurately rotate in synchronization with the rotation of the bottle.

Next, a modified embodiment of the register will be described. In the above embodiment, the flat bottom wall 8 of the bottle A is
The wall surface 10a of the straight portion facing the register 9 provided in the
6 b, the bottom wall of the register 9 is formed by a quadrangle, and the insertion surface is formed by a track ellipse. 6, the bottom wall 40 and the insertion surface 41 have an elliptical shape, and as shown in FIG. 6B, the bottom wall 42 has an elliptical shape and the insertion surface 43 has a rhombic shape in which the longitudinal side end portion is an arc. Alternatively, as shown in FIG. 6C, the bottom wall 44 and the insertion surface 45
May have a rectangular shape whose corners are arcs. In either case, the wall surface on the short diameter side is made nearly vertical and the end portion on the long side is made an inclined surface, whereby the same effect as that of the embodiment can be obtained.

In the above-described embodiment, the concave portion provided at the bottom of the bottle is described as a register for printing, but it may be a long concave portion for reinforcing the bottom and is not limited to the register.

[0018]

Since the present invention is constructed as described above, it has the following effects. Since the longitudinal direction of the register for printing was arranged in the direction orthogonal to the parting line, by gently sloping the longitudinal end of the register, the deformation of the periphery of the shoulder part and the body part at the time of mold opening Can be moved relatively slowly, so that restoration is easy and no scratches remain. In addition, the wall surface of the straight part facing the register can be made almost vertical, and thereby the alignment at the time of printing can be made accurate.

[Brief description of drawings]

FIG. 1 is a front view of a bottle of the present invention.

FIG. 2 is a bottom view of the bottle.

FIG. 3 is a side view of the bottle.

FIG. 4 is an explanatory diagram when the mold is opened.

5A and 5B are explanatory views of a bottle holder, where FIG. 5A is a sectional front view, FIG. 5B is a sectional side view, and FIG.

FIG. 6 is an explanatory view of an embodiment of the register, (a),
(B), (c) is a bottle bottom view of three Examples.

[Explanation of symbols]

A bottle B blow mold C bottle holder PL parting line α, β tilt angle 1 mouth 2 shoulder 3 torso 4 bottom 5 screws 6 steps 7 Bottom end wall 8 flat bottom wall 9 registers 10a, b wall surface 11a, b wall surface 12 bottom wall 20a, b split type 21a Mouth molding part 21b Shoulder forming part 21c Body part 21d Bottom molding part 22a, b Long side end 23 Projection 30 side wall 31 bottom wall 32, 33 holding surface 34 Alignment ridge 35 Straight part 36 slope 37 Top wall

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Seijiro Higuchi             Stock exchange, 3-2-6 Oshima, Koto-ku, Tokyo             Inside the company Yoshino Industry (72) Inventor Takashi Fujie             Stock exchange, 3-2-6 Oshima, Koto-ku, Tokyo             Inside the company Yoshino Industry F term (reference) 3E033 AA01 BA16 BA18 DA03 DB03                       DD05 DD20 FA03

Claims (2)

[Claims] 1. A bottle characterized in that a recess is provided at the bottom of the bottle so as to extend in a direction orthogonal to the parting line. 2. The wall surface on the minor axis direction side of the recess is 70 ° or more 9
The bottle according to claim 1, which is less than 0 °.