JPS6082313A - Method of molding head section of synthetic resin tubular container - Google Patents

Abstract

PURPOSE:To exclude the labor and time that are otherwise required to eliminate scraped resin material from the inside of an apparatus, to make the apparatus simple and to facilitate the operation, by molding a head reaction sheet to have the head section sheet from with an opening, and molding the head section sheet into a surface part of a tubular container. CONSTITUTION:A head section sheet HS that has been punched to has an opening S2 at the central section is welded integrally to one end of a sleeve 14, and the sleeve 14 and the head section sheet HS are introduced in a core mold 9 and a cavity mold 12 for cooperatively molding a tubular container. With a mouth core section 11 projected from the forward surface of a mouth cylindrical core 10 formed at the forward end of the core mold 9 inserted into the opening S2 of the head section sheet HS, the head material sheet HS is compression molded into a head H of a tubular container T by the core mold 9 and the cavity mold 12. Therefore, since scrap of the resin material would not be generated at the mold apparatus section, the operation and time for removing such scrap out of the mold apparatus are not required.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for molding the head of a tube container made of thermoplastic synthetic resin. The purpose of this invention is to eliminate the generation of scrap of resin material in the mold equipment section consisting of.

As shown in FIGS. 1 and 2, the head of a synthetic resin tube container is formed by extrusion molding from a die L, and then the head is molded directly from a die II! ! A head body sheet for forming the head of the tube container is punched into a flat disk shape from a freshly formed thermoplastic synthetic resin sheet S conveyed by the feeding heald 2 using a rubber pad 3 and a cutter 4. This head body sheet is integrally welded to one end of a sleeve that has been previously formed into a cylindrical shape, and the combination of this sleeve and head body sheet is attached to a core metal that is the main body part of the tube container forming apparatus l. Assemble into the mold device part consisting of the mold and the keybitty mold 2. ．． By compression molding using a 1A mold and a cavity mold.

A method was adopted in which a head body sheet was molded into the head of a tube container.

That is, a flat disc-shaped sheet piece is punched and formed from a band-shaped sheet S, and this punched-formed flat disc-shaped sheet piece is used as a head body sheet. By this, C1-S is
As shown in FIG. 2, the resulting scrap sheet has a hole s1, which is the hole left after the head body sheet was removed.
The sheet S that has become the scrap sheet 1 is generally used as a recycled material as is.

This conventional method for molding the head of a tube container has the following advantages: the molding operation is simple, and the amount of synthetic resin material used to mold the head of the tube container can be set extremely easily and accurately. Although it is widely used due to its advantages such as being able to obtain more beautiful products,
In order to open-mold the two mouth parts from the head material sheet when forming the head, the resin material located at the mouth part is removed, so this cut resin material is used as the main body part of the duplex container molding device. The resin material that falls into the mold equipment part consisting of the core mold and the cavity mold becomes scrap, and it takes a lot of effort and time to remove this scrap resin material from the equipment. There was a serious drawback.

That is, in a mold device consisting of a core mold and a cavity mold, which is a conventional head molding device for a duplex container, 1.
The resin piece that was cut out to form the mouth part on the head must of course be discharged from the device, but in order to remove this resin piece, the core mold must be removed when the device mold is opened. A specialized device is required to remove the resin pieces attached to the tip of the core mold, and a special means is required to ensure that the resin pieces adhere to the tip of the core mold. This results in various operational and operational inconveniences and disadvantages.

Further, in this conventional method for forming the head of a tube container, the opening shape of the mouth portion that can be formed is limited to a circular shape, and it is completely impossible to freely set the opening shape.

The present invention has been devised to eliminate the drawbacks, inconveniences, and dissatisfaction of the conventional examples described above.

The head element sheet is molded with a 1" hole that will become the opening of the tube container formed in the center of the head element sheet, and the head of the tube container is formed using this element sheet. I made it.

Two embodiments of the present invention will be described below with reference to the drawings.

The method for forming the head of a thermoplastic synthetic resin tube container according to the present invention is to form a thermoplastic synthetic resin sheet S extruded from a die 1, and form a small-diameter opening S in the center.
2. Head part of tube container T punched and formed with holes 1. Head element sheet Its for molding, j: j5
A cup 1 of a cylindrical sleeve 14 made of plastic synthetic resin
Then, one end of the sleeve 14 is welded together in a closed form, and the sleeve 14 and head body seam 1-1ts are integrated into a core mold 9 and a cavity mold 12 for tube container molding. Group I'.

The stepped mouth core metal part 11 protruding from the front end surface of the mouth tube core metal part 10 formed at the tip of the core mold 9 was fitted into the mouth hole S2 of the head body sheet lls described in +iiij. In this state, the head body seam 1-115 is compression molded into the head part 1 of the tube container' by using the core mold 9 and the cavity mold part 2.

In the embodiment shown in FIGS. 3 and 4, the sheet 1-S extruded from the die 1 is provided with a first cutter 7 and a first
With the rubber pad 5, holes S2 of small diameter are punched out at predetermined regular intervals. The head body sheet 1-11s is punched and formed using the same second cutter 8 and second rubber pad 6 as in 4.

That is, as shown in FIG. 4, when the sheath 1-S is moved to a position facing the second cutter 8 by the In feeding heald 2 with a small diameter hole S2 formed therein, A punching hole s1 is formed by punching the head body sheet 1-115 using the second cutter 8.

Therefore, the form of the scrapped sheet S itself is exactly the same as that of the conventional sheet.

The head body sheet IIs punched and formed by this second cutter 8 is produced by a device comprising a core mold 9 and a cavity mold 12. The sleeve 14 is integrally welded and fixed to one end of a cylindrical sleeve I4 made of thermoplastic synthetic resin that has already been molded separately, with one end of the sleeve 14 closed.

The means for integrally welding and fixing the head body seams to the sleeve 14 is not particularly limited, but from the viewpoint of operation, handling, and fixing strength. As in the embodiment shown in FIG. 3, the sleeve I4 is pre-assembled and fixed to the second cutter 8, and the head body seam 1-115 is stamped and formed by the second cutter 8.
The head body sea 1-1ts is stamped and molded.
It is convenient to integrally weld and fix the sleeve 14 to one end of the sleeve 14.

In other words, since the hesodium body sheet 1-1ts is punched from the sheet S that has just been extruded from the die 1, it has not yet been sufficiently hardened. For this reason, it has a sufficient welding blade for the sleeve 14 made of the same synthetic resin, and for this reason, the head body sheet Its is stamped and formed by the cutter 8, and at the same time the sleeve I4 assembled to this cutter 8 It is welded together.

This method of welding and fixing the sleeve 14 and the head body sheet Its is as follows:
There is no need to manipulate and set the mutual posture and positional relationship between the assembly and the ts, and no heating operation is required for welding, and the sleeve 14 and・It exhibits excellent effects such as the positional relationship of the set fq with the \nd element body sheet l-1ts is inevitably set accurately.

As described above, the combination of the hesode element body seam 1-1ts and the sleeve 14, which are molded into the structure shown in FIGS. 5 and 6, is assembled with the core mold 9 and the cavity mold in the attitude shown in FIG. It is used in a mold device consisting of a mold 12.

As shown in FIG. 3, once the combination of the head body sheet and the sleeve I4 has been assembled into the mold device A, 1, the core mold 9 is advanced (see FIGS. 7 and 8). As shown in FIG.
'j. Compression mold S into head H.

During compression molding of this head body Sheet into the head II, the core mold 9 is first moved forward by the core mold 9.
The mouth core metal part 1 is stepped and protrudes from the distal end surface of the mouth pipe core metal part 10.
1 is inserted into the opening hole s2 of the second head body seam Is, but this ['' part core metal part 1'. As the core mold 9 moves forward, it moves forward while passing through the head body seam 1-1ts. Assembly of cavity metal L 2 4 holes I3
The core mold 9 and the cavity mold l are tightly fitted into each other.
The formation of the molding space by 2 is not completed for the time being.

As described above, when assembling the mouth tube core metal part II into the hole 13, the mouth tube core metal part 11 is attached to the mouth JLS.
2 and penetrates through the hesodium body seam 1-1ts, so the set (=J hole 13) outside the molding space of head II
There is no -813 of Hen 1' element body Sea 1・Its pushed out in the head element body Sea 1・Its, and all of the head element body Sea 1・IIs
It is located within the molding space for molding.

From this state, the head body sheet Its is compression-molded into the head H shown in FIG. 8 by clamping the core mold 9 and the cavity mold 12. The molding of the head of the tube container is completed.

As described above, in the method for forming the head of a tube container according to the present invention, the opening hole s2 is formed in advance in the head body sheet Its, and when compression molding of the head body sheets 1 to 115 to the head H is performed. ．． iii) Since the mouth core metal part 11 of the core mold 9 is fitted into the mouth hole S2. Scraping of the resin material does not occur at all, and this causes the molding equipment to scrape. There is no need for special equipment, work, and time for removing the scram from the resin material, making it possible to simplify the equipment and work.

In addition, since the final compression molding of the head element sheet Its into the head 11 is performed with the mouth core metal part 1l positioned in the mouth hole S2, the planar shape of the mouth core metal part II is For example, by forming it into a triangle as shown in Figure 9, a mano and two hearts as shown in Figure H).

The opening shape of the opening formed in the head H of the tube container T can be freely set and molded into a free shape such as a triangle or a heart shape.

As is clear from the above description, the method for molding the head of a tube container according to the present invention includes a spatula, which is the main body of the molding device; Since no scrap of resin material is generated,
Not only does it eliminate the need for a special device for removing this scrap outside the mold device, but it also eliminates the need for work and time for removing the scrap, thereby simplifying the structure of this type of device. In addition, it is easy to operate, and the time and man-hours required to complete one tube container can be significantly reduced.The opening shape of the mouth of the tube container can be freely set, and molding can be done easily and easily. It exhibits many excellent effects such as being able to add ease of use, interest, and variety to the tube container.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are for explaining the conventional example.
FIG. 1 is a front view, and FIG. 2 is a plan view of the seat. FIG. 3 is a front view showing one embodiment of the method of the present invention. FIG. 4 is a plan view of the sorting that occurs when carrying out the method of the present invention. 5 and 6 show a combination of a head body sheet and a sleeve formed by carrying out the two methods of the present invention, FIG. 5 is a plan view, and FIG. 6 is a longitudinal cross-section. It is a diagram. 7 and 8 are longitudinal cross-sectional views showing the state of the head molding operation according to the method of the present invention. FIG. 7 shows the state immediately before compression molding, and FIG. 8 shows the state after compression molding is completed. be. FIGS. 9 and 10 show two examples of the planar shape of the mouth core metal part of the core mold used in carrying out the method of the present invention. Explanation of symbols 1; Dice; 2; Conveyor belt; 3.5.6: Rubber pad; 4, 7.8. Cutter, 9; core mold. 10: IJ cylinder core metal part, 11: mouth core metal part, 12: cavity mold, 13: set A'' hole, S: sheet. 11S; Head body Sea 1-, S2i mouth hole, T; Tube container, I]; Head. Applicant Yoshino Kogyo Co., Ltd. Drawing f'f+
Calligraphy (no change in content) 1 color 7e / 4 Putoyu -jt7/l) Sword/? Z, First 3 Spear βa Procedure Ne Ichi Masahiro: (Voluntary) ■, Indication of the case 1982 Patent Application No. 190 JO 4 No. 2, Name of the invention Method for forming the head of a container 3, Amendment Relationship with the case of the person who filed the patent application Patent applicant name (690) Yoshino Kogyo Co., Ltd. 4, engraving of the agent's drawings (no change in content) (1) Nine drawings attached to the above application. Amend the amended drawings attached to the written amendment. 7. List of attached documents (1) One amended drawing

Claims (1)

[Claims] A head body sheet for forming the head of a tube container is punched from an extruded thermoplastic synthetic resin sheet with a small diameter hole in the center. The sleeve is welded to one end of the sleeve in a closed manner, and the sleeve and the head body sheet are assembled into a core mold and a cavity mold for tube container molding. 1. While keeping the stepped mouth core metal part protruding from the front end surface of the one-cylinder core metal part formed at the front end of the core mold inserted into the mouth ratio of the head body sheet. A method for molding the head of a synthetic resin tube container, comprising compression molding the head element sheet into the head of the tube container using the core mold and the cavity mold.