JP4293754B2 - Plastic blow infusion bottle - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a plastic blow bottle having an embossed part.
[0002]
[Prior art]
A plastic blow bottle is formed by extruding a parison into a mold and then blowing and stretching the air, but depending on the product, it does not undergo blow molding in which part of the material is stretched. Some have a non-blow molding embossing part that is molded only in shape.
[0003]
For example, the infusion blow bottle 101 used for filling an infusion such as a drip needs to be used by suspending the bottle upside down with the mouth portion down at the time of infusion, so as shown in FIG. 102 is provided on the bottom 104 of the bottle, and the hanging hook 102 is connected to the container body via a hinge 105.
[0004]
The hinge portion 105 and the hanging hook 102 have a shape determined by the gap between the mold surfaces on both sides when the tube-shaped parison is sandwiched between the divided molds. It is molded by embossing by sandwiching and pressing on the surface. At this time, if the wall thickness of the parison sandwiched between the mold surfaces on both sides is t, the thickness of the hook 102 is the thickness of two folded walls (2t), and the thickness of the hinge portion 105 is It is (2t-β) where β is the reduced thickness. Although air is contained in the parison, the air in the parison is almost pushed out of the product in the container body 101 to be blow molded, but the hook 102 and the hinge 105 are thin and have both sides. The cooling rate is high because it is in contact with the mold surface. Therefore, as shown in FIGS. 7 and 8, air is trapped in the hook portion and the hinge portion and remains as bubbles 21 or the bubbles are popped on the surface. It may leave a trace, obstruct the appearance of the hook part and the hinge part, cause a variation in strength, and may cause the washing water to run out.
[0005]
For these reasons, there is a demand for development of a plastic blow bottle in which no air remains in the hinge portion and the residual air does not hinder the appearance of the product.
[0006]
The present invention has been made in view of the circumstances as described above, and in particular, there is no air remaining in the hinge portion, the residual air does not hinder the appearance of the product, and the quality of the product can be stabilized. The object is to provide a plastic blow bottle.
[0007]
Corresponding to this purpose, the plastic blow infusion bottle of the present invention is a container main body obtained by blow molding a parison in a mold, and a mold surface connected to the container main body between the mold surfaces of the joint of the mold. The non-blow molding hinge part whose thickness is determined by the width of the gap between the two and the non-blow molding whose thickness is determined by the width of the gap between the mold surfaces connected to the hinge part and connected to the hinge part A plastic blow infusion bottle having a lifting device having a wall thickness greater than that of the hinge portion and greater than twice the wall thickness of the parison, wherein the amount of resin per unit volume is The hinge part is larger than the tool, and at least a part of the surface of the hanger is formed on a non-smooth surface or a non-smooth surface to cause irregular reflection of light.
[0009]
【Example】
The details of the present invention will be described below with reference to the drawings showing an embodiment.
In FIG. 1, reference numeral 1 denotes a plastic blow bottle. The plastic blow bottle 1 is provided with a hanging hook 5 on a bottom portion 4 of a container body 2 via a hinge portion 3. The plastic blow bottle 1 is obtained by blow-molding a cylindrical parison 6 as shown in FIG. 2 using a mold as shown in FIG.
[0010]
The container body 2 is a portion in which a parison 6 having a wall thickness t is blow-molded by blowing air using the mold surfaces 7 and 8 of the mold. Neither the hinge part 3 nor the hanging hook 5 has undergone blow molding (referred to as non-blow molding), and is a stamping molding part whose thickness is determined by the width of the gap between the mold surfaces of the mold, The hinge portion 3 has a thickness t1 determined by the width of the gap 13 between the mold surface 11 and the mold surface 12, and the hanging hook 5 has a gap 16 between the mold surface 14 and the mold surface 15. The thickness is determined by the width and has a thickness t2 + α. It should be particularly noted here that the thickness t1 of the hinge portion 3 is smaller than the thickness t2 of the two parison walls sandwiched between the mold surface 11 and the mold surface 12 and folded (t1 <2t). That is, the thickness t2 of the hanging hook 5 is larger by α than the thickness 2t of the two parison walls sandwiched between the mold surface 14 and the mold surface 15 and folded. . A preferable thickness ratio between the hinge portion 3 and the hanging hook 5 is 1: 3 to 1:10, more preferably 1: 5 to 1: 8. By making such a thickness ratio, the air pushed out by the mold surfaces 11 and 12 from the hinge portion 3 and expelled from flowing into the uncured hanging hook 5 is not obstructed and shaped. It is possible to manufacture with good performance.
[0011]
By molding in this way, the amount of resin per unit volume is slightly larger in the hinge portion 3 than in the hanging hook 5.
[0012]
At least a part of the surface of the hanging hook 5 is formed on a non-smooth surface or a non-smooth surface. For example, as shown in FIGS. 4 and 5, a large number of irregularities, grooves or rough surfaces 17 are formed.
[0013]
In the plastic blow bottle 1 configured as described above, the hanging hook 5 sandwiched between the mold surfaces 7 and 8 has a thickness t2 (= 2t + α) which is larger than the total wall thickness of the two parison walls 2t. ) So that the air can be accommodated and has a large thickness t2. Therefore, the cooling rate is reduced in the blow molding process, and the inflowing air can be flown. Air that is pushed out from the hinge portion 3 by the mold surfaces 11 and 12 to flow into the uncured suspension hook 5 can be sufficiently accommodated and held without being hindered.
[0014]
Therefore, the hinge part 3 can have a stable strength structure in which the bubbles 21 do not remain.
[0015]
When irregularities, grooves or rough surfaces 17 are formed on the surface of the hanging hook 5 to form a non-smooth surface or non-smooth surface, this causes irregular reflection of light, and bubbles are formed in the hanging hook 5. Even if 21 exists, it becomes inconspicuous, and due to its opacity, handling of the hanging hook 5 at the time of hanging the container in the medical field becomes easy, and information can be written. Furthermore, since the area that can be contacted with other planes is reduced by forming the irregularities, grooves, and rough surface 17 of the hanging hook 5, the hanging hook 5 is in close contact with the other container during retort heating of the container. It can be prevented in advance that it cannot be easily separated.
[0016]
【effect】
As is apparent from the above description, according to the present invention, there is no plastic residue in the hinge portion, the residual air does not hinder the appearance of the product, and the plastic blow bottle that can stabilize the quality of the product. Obtainable.
[0017]
[Brief description of the drawings]
FIG. 1 is an explanatory front sectional view showing a plastic blow bottle of the present invention.
FIG. 2 is a perspective explanatory view of a parison.
FIG. 3 is an explanatory sectional view showing a state of blow molding.
FIG. 4 is a front explanatory view of a hanging part according to another embodiment.
FIG. 5 is an explanatory plan view of a hanging part according to another embodiment.
FIG. 6 is a front partial cross-sectional view showing a conventional plastic blow bottle.
FIG. 7 is an explanatory front view of a conventional hanging part.
FIG. 8 is an explanatory plan view of a conventional hanging part.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Plastic blow bottle 2 Container body 3 Hinge part 4 Bottom part 5 Hanging hook 6 Parison 7 Mold surface 8 Mold surface 11 Mold surface 12 Mold surface 13 Gap 14 Mold surface 15 Mold surface 16 Gap 17 Concavity and convexity, groove, rough surface 21 Bubble 101 Infusion Blow Bottle 102 Hanging Hook 104 Bottle Bottom 105 Connection Portion

Claims (1)

A container body obtained by blow-molding a parison in a mold, and a non-blow-molded hinge part that is connected to the container body and whose thickness is determined by the width of the gap between the mold surfaces of the joint of the mold And a plastic blow infusion bottle having a thickness that is determined by the width of the gap between the mold surfaces of the joint of the mold connected to the hinge portion, thickness of the ingredients is greater than twice the thickness of the pre-Symbol parison one or greater than the hinge portion, larger in the hinge portion than the amount of the resin is said hanger per unit volume, of the hanging member A plastic blow infusion bottle characterized in that at least a part of the surface is formed into a non-smooth surface or a non-smooth surface to cause irregular reflection of light

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