JPS6113969B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for molding a synthetic resin tube container with a spout.

The present applicant first prepared a cylinder for forming a tube container with a bottom and an open top, and then pressed a male mold, which was removably fitted into the cylinder into the female mold, into the cylinder. An application has been filed (Japanese Patent Application No. 48-45975, Japanese Patent Publication No. 57-12739) regarding a method for forming a tube container body in which the shoulder and mouth and neck of the tube container are formed by the bottom wall of the body. A spout is formed at the same time as the neck, etc., and the male mold is pulled out from the cylindrical body, so that the spout is fitted into the mouth and neck.

To explain the drawings below, first, as shown in FIG. 1, a tubular container-forming cylindrical body 1 made of synthetic resin and having a bottom and an open top is provided. Although the cylindrical body formation is explained in detail in the above-mentioned application, it is not necessarily necessary to perform it by that method. The bottom wall 2 is preferably thicker than the body 3.

Reference numeral 4 is a male mold having a body fitting part 5 having an outer diameter that is approximately the same as the inner diameter of the body part 3, and a mouth and neck part forming part 7 from the lower surface thereof through a reversely tapered shoulder forming part 6. is hanging down. A mouth plug forming part 9 is further suspended from the lower surface of the mouth and neck forming part 7 via a downwardly directed step part 8. A convex engaging portion 9a is attached to the outer surface of the portion for fitting a spout formed as described later into the mouth and neck portion 18.

Reference numeral 10 denotes a female mold formed corresponding to the male mold, which is formed by (appropriately) combining a plurality of parts. 11 is a body fitting part, 12 is a shoulder forming recess, 1
3 is a threaded mouth and neck forming recess, and 14 is a plug forming recess. A recess 15 for forming an outward flange 22 in the shape of an extension of the top wall 21 of the plug is formed in the plug forming recess.

As shown in the figure, the female mold and the male mold are in contact with each other at the downward stepped part 8, which is the part between the mouth and neck part 18 and the spout 20, and the corresponding female mold part in the pressed state. In other words, it is desirable that the mouth and neck portion and the spout be easily separated or broken. 16 is a breaking ring 23 attached to the outer periphery of the outward flange 22 via a breaking line.
It is a protrusion that is provided to form a ring, and the breaking ring is added to provide a sealing or sealing function.

By inserting the male mold 4 into the tube container forming cylindrical body 1 and pressing it into the female mold, the bottom wall 2 is deformed to form a shoulder portion 17, a neck portion 18,
A spout 20 is formed. After stamping, by releasing the mold portion of the female mold having the spout forming recess 14, the space between the outward flange 22 and the mouth top surface 19 of the mouth neck is opened. By pulling out the mold 4, the spout 20 is fitted into the mouth and neck, and after its outward flange engages with the mouth top surface 19, the male mold is further pulled out, so that the spout is separated from the male mold. . The other parts may be released from the female mold either before or after.

The entire process of the tube container intermediate product thus formed is completed by filling the upper opening with the contents, sealing the opening, and screwing the cap onto the mouth and neck.

Since the present invention is carried out by the above method, it is convenient because the spout can be molded at the same time as the mouth and neck, etc., and there is no need to cut the upper end of the mouth and neck as in the conventional method. The spout fits into the mouth and neck, which helps reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a cylinder for forming a tube container;
FIG. 2 is a sectional view of a mold for carrying out the method of the present invention. 1... Cylindrical body for forming a tube container, 2... Bottom wall,
4... Male mold, 6... Shoulder forming part, 7... Mouth and neck forming part, 9... Spout forming part, 9a... Engaging part, 10... Female mold, 14... Spout forming recess, 1
7... Shoulder, 18... Mouth and neck, 20... Mouth plug, 2
2...Outward flange.

Claims (1)

[Claims] 1 Cylindrical body for forming a tube container with a bottom and an open top end 1
A tube container body in which a shoulder part and a neck part of the tube container are formed on the bottom wall of the tube container by pressing a male mold 4 which is removably fitted into the cylinder into a female mold 10. In the forming method, the male mold 4
At the tip of the mouth and neck forming part 7, a spout forming part 9 with an engaging part 9a is attached, and a mold part having a corresponding recess 14 for forming a spout 20 with an outward flange is attached to the female mold 10. Please attach it to
By molding the flanged spout at the same time as the tube container main body by the above-mentioned embossing, and by pulling out the male mold 4 after releasing the spout-forming recess 14 portion of the male mold, the above-mentioned engaging portion 9a, the spout 20 is fitted into the mouth and neck portion 18, and the fitting causes the outward flange of the spout to engage with the top surface of the mouth and neck, thereby detaching the male mold from the spout. A method for molding a synthetic resin tube container with a spout.