JPS58167141A - Manufacture of bottle stopper - Google Patents

Abstract

PURPOSE:To obtain a bottle stopper having excellent sealing property and free of the delamination of surface layer and dispersion of a dimensions by a method in which a soft resin surface layer having a truncated inversed conical form, having an opening on its bottom and an projection on its outer face, is set molds for forming a stopper and then a rigid resin is injected into the molds for molding. CONSTITUTION:A surface layer 13 is molded of a soft thermoplastic synthetic resin, preferably polyethylene, having a truncated inversed conical form similar to a concaved part 10. In the surface layer 13, also, the bottom 15 is opened, and the inner surface is preferably provided with plural horizontal and certical lines 16 and 17. Also, in the space 18 formed by a cavity mold 7, a core mold 8, and a takeout plate 10, a concaved part 10 constitutes a vertical part, and both ends of a horizontal part 18a extends downwards for form a nearly T-shaped cross section. The upper end 19 of the surface layer 13 set in the concaved part is projected into the horizontal part 18 of the space. A molten rigid thermoplastic synthetic resin is injected into the space 18 through the bottom of the concaved part 10 and the opened bottom 15 of the surface layer 13 from a pathway 11 formed in the core mold 8 and then hardened by cooling to form a stopper 20 having a shape corresponding to the space 18.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a stopper, and more particularly to a method for manufacturing a stopper for a bottle containing perfume.

In general, most perfume bottles are made of glass for reasons such as creating a sense of luxury and hanging them, and the installation of the hot water stopper is not the same as with regular bottles.
Eye 1 #1 is a method in which the inverted circular fitting portion of the stopper is fitted onto the inner surface of the bottle mouth which is formed into a conical shape. In that case, perfume has a much higher level of fear than other lotions and emulsions, so
It is necessary that the sealing effect of Rei's pale blue color is sufficiently guaranteed.

In many conventional perfume bottles, the stopper is made of glass as well as the bottle, but in order to increase the above-mentioned sealing effect, the glass stopper 1 is fitted as shown in Figures 1 and 2. A surface layer 3 made of a soft synthetic resin such as polyethylene is provided on the outer surface of the mating protrusion 2, and a plurality of protrusions 4.4 are formed on the outer periphery of the surface layer 3. Such surface bodies are usually molded by inserting glass into a sparrow shape and then injecting molten resin. Not only is it necessary to form the recesses 5 and the serrated surfaces 6 in advance, but the grinding for the keys is complicated and costs increase, and the thickness of the body 3 in Table 1 is too large. Because of the uneven cooling and solidification, sink marks often appear on the surface, which reduces the sealing effect.

In addition, recently, instead of the above-mentioned glass stopper, a simple type 5-shaped Taisei Akisoboro stopper has appeared, but for reasons such as balance with the glass bottle, the external part of the stopper is hard. C formed of resin is It. Therefore, as in the case of glass stoppers, it is necessary to provide a surface made of soft resin such as polyethylene at the fitting part, but unlike the conventional case, the In the fitting method,
In addition to problems such as long-term (heavy use), the surface layer may fall off from the stopper due to contact resistance with the inside of the bottle, and the sealing effect is reduced due to sink marks that occur on the surface layer. They had various drawbacks, such as poor fitting and poor fitting due to variations in the way the body and plug were connected.

The main invention was made in consideration of the circumstances mentioned above, so
The purpose is to create a stopper that is especially suitable for perfume bottles, which can provide a sufficient sealing effect, and which does not require the hassle of creating a single stopper that does not have the risk of falling off or having uneven dimensions. The object of the present invention is to provide a method that can be manufactured at relatively low cost without any problems.

Hereinafter, a manufacturing method according to a preferred embodiment of the invention will be described with reference to the accompanying drawings.

FIG. 3 shows a 4-it mold for manufacturing a mold using the method according to the present invention. This mold consists of a cavity mold 1, a core mold 8 and a take-out plate 9. A truncated inverted circular 4-shaped recess lO is formed in the upper center of the core @S, and the bottom surface of the recess communicates with a passage 11 for resin injection.

A plurality of beaks [2] are provided on the peripheral wall of this recess lO, and a protrusion 14 formed on the outer surface of this IIK table I body 13 is provided.
are loosely fitted, and the surface body is inserted into the recess IO.

The surface layer 13 is molded from a soft thermoplastic synthetic tree, preferably polyethylene ethylene, and is formed in the shape of a hollow circle in the recess 10 and the open collar, with the IJE part 15 being an opening. Preferably, a plurality of beaks 418 and longitudinal stripes 17 are provided on the inner peripheral surface. In addition, in the illustrated embodiment, a pre-formed table [3
is inserted into the recess lO of the core mold 6, but more preferably, the table 1 body 13 is first inserted using the core mold.
is formed by injection molding, and the core mold is rotated or 4-feeded until the ff length is reached, and the core mold is placed at the front 11tK as shown in FIG. 3, for example, a double Such a method is also possible by using a rotary molding machine (not shown) or the like.

On the other hand, the space 18 partitioned by the cavity mold 7, the core mold 8, and the take-out plate 10 has a substantially T-shape with the recess tO as the straight part and both ends of the horizontal part 18a extending downward. , the upper part 1 of the table 111r*13 placed in the recess
9 protrudes into the horizontal portion tSa of the space. As shown in Figure 4, the fur mold 8 is formed from the nine passages 11 to the bottom of the recess lO and 4Iiii! The melted thermoplastic synthetic resin is poured into space 1 through the opening bottom 15 of I1 13.
By injecting the resin into the space 8 and cooling and hardening the resin there, a resin body 20 having a shape corresponding to the space is molded. The horizontal stripes 16, length 17, and upper part 19 make it integrally fixed. In addition, as mentioned above, each ringing body 13 is provided with a protrusion and its own weight varies depending on the location, so sink marks are often generated on the surface during molding, but these sink marks are as described above. By placing one body in a recess +olC and injecting molten resin there, the surface of the surface body 13 is pressed against the mold from the inside by the heat, pressure, and trap of the core resin, so it is removed at this stage. Ru.

As the winning resin for forming the plug, it is preferable to use polypropylene or methylpentene compound, which is corrosion resistant to perfumes and convenient for the outer layer. From the relationship with the removal of the tank mark in Table 9, these resins were melted at 200C to 220C,
It is preferable to inject into the mold space 18 at a pressure of 400 mm to 500 mm.

After molding the plug body 20 with the surface weight fixed in the mold in this way, when the cavity mold 1 is moved and the take-out plate 9 is slid upward, the plug body 20 is cooled, hardened, and shrunk.
0 easily escapes from the mold together with the surface layer 13, and thus a stopper 1, which is a molded product as shown in FIG. 5, is taken out. Since there are no unevenness due to sink marks on the surface of the front body 13 inserted into the first stopper C, a sufficient sealing effect can be obtained, and the surface body has circular protrusions 16. .17: In addition to fitting by screwing, the upper end 19 is buried in the horizontal part of the stopper and is integrally fixed to the stopper, so it cannot be inserted strongly into the bottle mouth or rotated in a large state. Even if you use it by pulling it out with strong force, the surface body 13 will be removed from the body, and there is no fear that the thoughts will repeat at all.

Also, a table made of soft resin such as polyethylene)
Since the tank body 13 is fixed to the plug at the same time as it is molded in the mold, there is no need for the conventional work of fitting these later or polishing the plug. One of the problems associated with dimensional variations can be solved.

In the example below, 13 is [1 and i! 16□~C vertical stripes 17, but as shown in the sixth threshold, it is also possible to provide an outward flange 21 at 8mjUq' above the surface layer 13' instead of these protrusions. This also prevents one person from falling off or spinning around.

As described above, according to the method for manufacturing a stopper according to the present invention, the surface layer body is shaped like a truncated inverted cone, has an open bottom, and has protrusions on the outer surface, and molds the surface layer body from a soft thermoplastic synthetic resin. One carcass is placed in a mold for forming a stopper having a space with a T-shaped cross section, and the upper end of the carcass is projected into the horizontal part of the space.
Fi melted from the bottom opening of the book! By injecting a high quality thermoplastic synthetic resin into the space and cooling and hardening the hard resin, the plug body is manufactured and the surface layer body is integrally fixed to the plug body. This eliminates the need for work processes such as fitting the table 1 body and the stopper body together later, or polishing and preparing a recess for fitting the stopper body K1. It is true that the cost-effective method can be improved by CV, and the surface layer of one stopper manufactured has no unevenness due to sink marks, so a sufficient sealing effect can be obtained, and furthermore, the top of the surface layer = 'ms Since it is embedded in the plug body, there is no fear that the surface layer will shrink or fall off even after long-term use.

In addition, the soft resin is preferably polyethylene, and the soft resin is preferably polypropylene or methylpentene polymer, respectively, and these have excellent elasticity, perfume resistance, and good appearance. can be obtained.

Also, the above? i! Melt 1 substance at 200G to 220C.
When C is injected into the gold W at a pressure of 400 tLf/cd to 500 m/-, sink marks on the surface of the surface of the mounting body can be efficiently removed.

Furthermore, the @-marked bite body may be pre-molded and inserted into the above ♀q, but it may be formed by injection molding in a mold, and then floated in the mold and placed in the same position as above. If the plug body is transferred and placed in a mold for molding, it is possible to perform the molding of the surface layer body and the plug body in a single process.
It becomes TD, and the manufacturing process can be simplified by 11111 Pi.

[Brief explanation of drawings]

Fig. 1 and Fig. 2 show a conventional common stopper for perfume 1, and No. 1II3!1 shows the state a inserted into the mouth indicated by a broken line in the front view, and No. Figure 2 shows I-I in Figure 1.
3 is a cross-sectional view taken along the line, 3rd blank is a sectional view showing a mold used in the manufacturing method of 1 orange according to an embodiment of the present invention in a state in which Table 1 is arranged in one piece, and 4th is a compensation mold. Fig. 6 is a sectional view showing an example of an orange manufactured by the method according to the present invention; Fig. 6 is a sectional view showing another example of a plug. be. 7.8.9... @ type 13... Surface body 14... Protrusion 15... Opening bottom 18... ......Space 18a...Horizontal part 19...Top 4 part 20...Reinbody patent Applicant: Yoshida Kokane Co., Ltd. Company agent Patent attorney - I'・, Sake Salmon Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] (1) A table body having an inverted conical shape with an open bottom and a protrusion on the outer surface is molded from a soft thermoplastic resin, and the carcass is placed in a space approximately T-shaped in cross section. The upper part of the carcass was placed in a mold for forming a plug body with A method for manufacturing a plug, characterized in that a plug is manufactured by injecting the hard resin into the space, cooling and hardening the hard resin, and the plug is integrally and firmly attached to the cough plug. . (21) The method for manufacturing an expanded frame according to claim 1, characterized in that the soft thermoplastic synthetic resin is polyethylene, and the hard thermoplastic synthetic resin is polyglobylene or methylpentene heavy base. (3) The hard thermoplastic synthetic resin is heated to 200 C to 2
The manufacturing method according to claim 1 or 2, characterized in that the material is melted at 20C and injected into the mold at a pressure of 400F1/d to 500F1/d. (4) The above-mentioned table 1 is formed by injection molding in a @ mold, and is transferred and placed in the stopper mold while remaining in the cough sparrow mold. A method for manufacturing a stopper according to item 1, item 2, or item 3.