JP6979345B2 - Blow container and its manufacturing method - Google Patents

Description

The present invention relates to a foldable substantially rectangular parallelepiped blow container made of a soft synthetic resin and a method for producing the same.

The foldable rectangular parallelepiped blow container is made of soft synthetic resin and is manufactured by blow molding. When it is empty, it can be folded to reduce its volume and can be stacked and transported, and when used, it is placed in a cardboard box. It is installed, infused with liquid and powdered containers, inflated, and delivered with cardboard boxes.

Various such blow containers have been proposed. For example, two isosceles triangular columnar shells having substantially right apex angles obtained by a molding method such as "blow molding, vacuum molding, etc." are opposed to the bottom surface. , A straight (or cubic) square obtained by welding the surroundings (the welded part is called a parting line) with both of the joints protruding outward, is the part corresponding to one triangular pillar (the part corresponding to one triangular pillar). The side that should be the folded inner layer in a soft plastic container that has a structure that can be folded by flipping the folded inner layer) along the parting line and inside the other triangular pillar equivalent part (called the folded outer layer). A ridge (hereinafter referred to simply as a ridge) that continuously bulges outward in an arc shape is provided along the parting line, and the center line of the ridge and the center of the parting line. It is characterized in that the distance from the wire is short at the thin point of the molded product and long at the thick point, and the height of the ridge is low at the thin point and high at the thick point of the molded product. Foldable soft plastic container. ”(For example, see Patent Document 1),“ The volume of the container body 1 molded using soft plastic by means such as blow molding is substantially divided into two (1A, 1B). Reinforcing ribs 3 are fused and formed along the line toward the outside, an opening / closing portion 2 is provided on the upper portion of one of the substrates 1A, and the other folding body 1B is provided with the reinforcing ribs 3 at a position in the vicinity of the reinforcing ribs 3. In a soft plastic container in which a thin-walled ridge 4 for folding is formed along the reinforcing rib 3 so as to be able to fold the other folding body 1B inward of the substrate 1A, the reinforcing rib is formed. 3 is deformed so as to cover the top portion 4a of the ridge 4 when the folded body 1B is filled and expanded, and is laid down toward the side surface 4b of the ridge 4 when folded into the substrate 1A. A soft plastic container having a length L in which the tip edge 3a of the reinforcing rib 3 is located higher than the top 4a of the ridge 4 when the reinforcing rib 3 is laid down. ”(See, for example, Patent Document 2). Etc. have been proposed.

The above container is suitable for delivery in a cardboard box, but when installed in a cardboard box, when injecting the stored items, the top lid of the cardboard box is folded outward and the side surface is injected. Because it is blindfolded by the top lid of the cardboard box, what to inject and when using it (when discharging the stored items), the top lid of the cardboard box will be folded outward and the side will be cardboard. Since it is blindfolded by the top lid of the box, it has the disadvantage that it is not possible to see what is stored from above. In addition, the cardboard box is often removed when it is used (when the stored items are discharged), but even in this case, there is a drawback that the stored items cannot be known.

Jikken 08-8995 Gazette Japanese Patent No. 3698482

In view of the above problems, an object of the present invention is a foldable rectangular parallelepiped in which what is injected / stored and what is stored can be reliably recognized from above when injecting and using. The present invention is to provide a blow container and a method for manufacturing the same.

That is, the present invention
[1] Reinforcing ribs that divide the volume into two equal parts are formed on the two facing side walls and have an opening, and a mouthpiece for fitting the lid is installed in the opening, which is soft. A foldable rectangular parallelepiped blow container made of synthetic resin, characterized in that the name of the container to be stored in the container is printed on the side wall of the container around the opening, and a blow container.
[2] A bottom-side mold having a substantially triangular columnar cavity, a tubular mold having an uneven portion indicating the name of the stored item to be stored in the container formed on the cavity-side surface, and a tubular mold having a tubular portion. It consists of an opening forming jig that is slidably inserted into the tubular part of the tubular mold, and is between the tubular mold and the opening forming jig to store the base on the cavity side. A die is installed in the space, and the die is made of a soft synthetic resin. The above-mentioned parison is characterized in that it supplies a parison in a state, molds it, injects compressed air to expand and mold the parison, then forms an opening with an opening forming jig, and then opens and demolds the mold. [1] The present invention relates to the method for manufacturing a blow container according to the above.

The configuration of the blow container of the present invention is as described above, and it is possible to reliably recognize from the top what is injected / stored and what is stored when injecting and using the stored items. When empty, it can be folded to reduce its volume and can be stacked and transported, and even if it is installed in a cardboard box, it can definitely inject and inflate a container consisting of liquid or powder, and can be delivered together with the cardboard box for use. There is no mistake in the stored items when doing so. Further, the configuration of the method for manufacturing a blow container of the present invention is as described above, and the blow container can be easily manufactured.

It is a top view which shows an example of the blow container of this invention. It is a side view which shows an example of the blow container of this invention. FIG. 3 is a cross-sectional view taken along the line AA in FIG. It is an enlarged plan view around the opening in FIG. It is a side view which shows an example of the state in which the blow container of this invention is folded. It is a schematic diagram which shows an example of the blow molding die used in the manufacturing method of the blow container of this invention. It is sectional drawing which shows an example of a subsidy mold.

The blow container of the present invention has a reinforcing rib that divides its volume into substantially two equal parts on two opposite side walls and has an opening, and a mouthpiece for fitting a lid is installed in the opening. It is a foldable rectangular parallelepiped blow container made of a soft synthetic resin, and is characterized in that the name of the container to be stored in the container is printed on the side wall of the container around the opening.

The soft synthetic resin is not particularly limited as long as it is a foldable soft synthetic resin, and may be a synthetic resin that is hard when it becomes thick or soft when it becomes thin, for example, an olefin. Examples thereof include based resins, vinyl chloride resins, acrylic resins and the like, and olefin resins are preferable. Examples of the olefin resin include high-density polyethylene resin, medium-density polyethylene resin, low-density polyethylene resin, linear low-density polyethylene resin, polypropylene resin, ethylene-propylene copolymer, and ethylene-1-butene copolymer. Examples thereof include polyethylene-1-pentene copolymers and polyethylene-1-hexene copolymers.

Next, the blow container of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an example of a blow container of the present invention, and FIG. 2 is a side view thereof. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 4 is an enlarged plan view of the periphery of the opening in FIG. Further, FIG. 5 is a side view showing an example of the state in which the blow container is folded.

In the figure, 1 is a blow container, which is formed into a substantially rectangular parallelepiped by an upper wall 1a, a bottom wall 1b, a left side wall 1c, a right side wall 1d, a front wall 1e, and a rear wall 1f made of a soft synthetic resin. An opening 2 is formed in the upper wall 1a, and a recessed portion 12 recessed downward is formed around the opening. A mouthpiece 11 for fitting the lid is installed in the recessed portion 12 around the opening, and the name 13 of the stored item to be stored in the container is printed on the side wall of the container which is the recessed portion 12 around the mouthpiece 11. There is.

If the base 11 is located at the lowest position in the substantially central portion of the recessed portion 12, when the blow container is installed in the cardboard box, the lid body may hit the lid portion of the cardboard box in a protruding state. The cardboard box is hard to break during transportation. Further, since the blow container of the present invention is made of a soft synthetic resin, the recessed portion 12 is projected so as to project the mouthpiece upward when the stored item is injected or discharged, and the stored item is injected and the lid is closed on the mouthpiece 11. After the body is installed and sealed, the mouthpiece 11 and the lid may be pushed downward. By doing this, the stored items can be injected and discharged more easily, more stored items can be stored and transported, and the cardboard box does not hit the lid of the cardboard box with the lid protruding, and the cardboard box is less likely to break during transportation. It is preferable because it becomes.

Further, as the printing method of the name 13 of the stored item, any conventionally known method may be adopted, for example, a method of writing with a writing instrument such as magic ink, a method of printing with an inkjet printer, a container in a molten state. Examples include a method of engraving the surface with a mold.

In the figure, 14 is a reinforcing rib, which is provided diagonally from the front wall 1e and the rear wall 1f from the left side wall 1c side to the right side wall 1d side, and along the reinforcing rib 14, the bottom wall 1b and the right side wall 1d. Is foldable along the reinforcing rib 14 as shown in FIG. 5 by pushing the blow container 1 inward.

In the method for manufacturing a blow container according to claim 1 of the present invention, a bottom-side mold having a substantially triangular columnar cavity and an uneven portion representing the name of the stored item to be stored in the container are formed on the cavity-side surface. It consists of a tubular mold having a tubular portion and an opening forming jig slidably inserted into the tubular portion of the tubular mold, and is between the tubular mold and the opening forming jig. A blow molding die made of a fixed die having a substantially triangular columnar cavity, in which an auxiliary mold having a space for accommodating the base is installed on the cavity side, is provided in the space. A mouthpiece is installed, a molten parison made of soft synthetic resin is supplied, and after molding, compressed air is injected to expand and mold the parison, and then an opening is formed with an opening forming jig, and then the mold is formed. It is characterized by opening and demolding.

Next, the method for manufacturing the blow container of the present invention will be described with reference to the drawings. FIG. 6 is a cross-sectional view showing an example of the blow molding die, and FIG. 7 is a cross-sectional view showing an example of the cavity-side surface of the auxiliary mold.

In the figure, 3 is a bottom mold and has a cavity 31 having a substantially triangular columnar shape. Reference numeral 4 denotes a die on the base side, which has a cavity 41 having a substantially triangular columnar shape having substantially the same shape as the cavity 31. The bottom mold 3 and the base mold 4 are installed so that the cavity 31 and the cavity 41 face each other and form a substantially rectangular parallelepiped cavity when the mold is fastened.

Reference numeral 5 denotes a subsidy mold installed in the base side mold 4, which is installed substantially perpendicular to one surface of the cavity 41 of the base side mold 4. The auxiliary mold 5 includes a cylindrical mold 51 and a jig 52 for forming an opening. A cylindrical portion 51a opened in a cylindrical shape is formed in the central portion of the tubular mold 51 in the length direction, and an uneven portion 51c representing the name of the stored item to be stored in the container is formed on the cavity side surface 51b. ing. The opening forming jig 52 is a substantially rod-shaped body, and is slidably inserted into the tubular portion 51a of the tubular mold 51.

The vicinity of the outlet portion (near the surface on the cavity side) of the tubular mold 51 is cut, and a space 53 for accommodating the mouthpiece is formed between the opening forming jigs 52. Further, the cavity-side surface of the tubular mold 51 is formed in a gentle convex shape so that the concave portion 12 can be formed when blow molding is performed.

In order to manufacture the blow container, first, the base 11 is installed in the space 53 of the subsidy mold 5. Next, the molten parison made of the soft synthetic resin is supplied to the cavities 31 and 41 between the bottom mold 3 and the base mold 4 which are open, so as to hang down from the vertical direction in FIG.

Next, the bottom mold 3 and the base mold 4 are molded to form a cavity of a substantially rectangular parallelepiped, and then compressed air is injected to expand and mold the parison. After the parison is expanded to form a shape along the surface of the cavity, the opening 2 is formed by sliding the opening-forming jig 52 back and forth.

When the bottom side mold 3 and the base side mold 4 are molded to form a cavity of a substantially rectangular parallelepiped, the reinforcing rib 14 is formed at the contact point, so that the bottom side is used to make the reinforcing rib 14 thicker. A concave portion may be formed at the contact portion between the mold 3 and the mold 4 cavity on the base side.

Further, in order to form the opening 2 more accurately, a cutting blade in the shape of an opening is erected on the cavity-side surface of the opening forming jig 52, and the opening forming jig 52 is pressed inward. It may be rotated to form an opening.

When the parison expands to form a shape along the cavity surface, the concave portion 12 is formed and the concave-convex portion 51c representing the name of the stored item to be stored in the container formed on the cavity side surface 51b. However, it is transferred to the outer surface and the name of the stored item to be stored in the container is engraved. At the same time, the base 11 installed in the space 53 is heat-sealed to the substantially central portion of the recessed portion 12.

Finally, a blow container is obtained by cooling, opening and demolding.

When the blow container of the present invention is empty, it is folded to reduce its volume and carried by stacking, and when it is used, it is installed in a cardboard box to inject and inflate a container made of liquid or powder, and then the cardboard is used. Suitable for delivery with boxes, it can be widely used in the field of packaging materials for transporting liquids and powders.

1 Blow container 11 Base 12 Recessed part 13 Name of stored items 14 Reinforcing rib 2 Opening 3 Bottom side mold 4 Base side mold 31, 41 Cavity 5 Auxiliary mold 51 Cylindrical mold 51a Cylindrical part 51b Cavity side surface 51c Concavo-convex part 52 Jig for forming an opening 53 Space

Claims (1)

From a soft synthetic resin in which reinforcing ribs that divide the volume into two equal parts are formed on the two facing side walls and an opening is provided, and a base for fitting a lid is installed in the opening. It is a foldable substantially rectangular blow container, and is a method of manufacturing a blow container in which the name of the stored items to be stored in the container is printed on the side wall of the container around the opening, and a cavity having a substantially triangular columnar shape is formed. The bottom-side mold has a concave-convex portion on the cavity-side surface that represents the name of the stored item to be stored in the container, and the tubular mold has a tubular portion, and the tubular portion of the tubular mold has a tubular portion. A subsidy consisting of an opening forming jig that is slidably inserted, and a space is formed between the tubular mold and the opening forming jig on the cavity side for accommodating a base. A die is installed in the space for a blow molding die consisting of a die on the die side having a substantially triangular columnar cavity in which the die is installed, and a molten parison made of a soft synthetic resin is supplied and molded. after, injecting compressed air expands forming a parison, then after forming the opening with the opening forming jig, features and be Lube low container manufacturing method of that type is opened, demolded.

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