JPS60214924A - Membrane forming device - Google Patents

Abstract

PURPOSE:To arrange so that bottles may be easily formed and at the same time a membrane may be at the delivery port of bottles by making a lower molding pin which is opposed to an upper molding pin pierce through the folded part of a parison protruded out the lower part of split molds and lifting the pierced part stuck to the lower molding pin. CONSTITUTION:A parison 3 is hermetically sealed by a mandrel for blowing 10 that has descended and split molds 5, 5 in the upper part and also by a bracket 7 folding the parison held by clampers 20, 20 in the lower part. The head 11a of an upper molding pin fits into a concave part 23 from the mandrel for blowing 10, forming an upper section of a delivery port 22. Simultaneously a lower molding pin 12 passes through a hole 21 of a bracket 7 into the parison 3 after piercing a fin 6, following the actuation of cylinders 26, 26. A broken piece of the parison 3 sticking to the lower molding pin 12 opposed to the upper molding pin 11 is compressed between the pins into a thin membrane 28 sticking to the inner middle part of the delivery port 22.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a membrane molding apparatus used for blow molding a bottle in a mold and at the same time providing an outlet for a filler having a membrane run. The membrane is designated 28 in Fig. 3 and is formed at the opening from which the contents of the bottle are taken out.

Traditionally, synthetic materials are melted by heating and extruded into a parison with an annular cross section, which is then held between molds to seal the lower end of the parison and cut off at the top. Compressed air is blown through the cut opening to form a bottle. In a blow molding machine that performs a series of steps such as injecting filler, sealing, and producing a product using a single blow molding machine, it was not possible to provide an outlet for the filler in the bottle. For this reason, the process of forming the bottle, providing the outlet for the bottle, and injecting and sealing the bottle were performed using separate machines, requiring a large number of machines and personnel. It had drawbacks such as requiring a large amount of factory floor space.

The purpose of the present invention is to eliminate these drawbacks by incorporating an upper forming pin in the mandrel, and providing a lower forming pin below the mandrel that moves up and down from below the mold in opposition to the upper forming pin, thereby bending the parison protruding from the bottom of the mold. By breaking through it and attaching the broken part to the lower forming pin and lifting it up, it is possible to simultaneously form a thin membrane wall at the outlet of the bottle at the same time as the bottle is formed, and the blow molding machine It is also an object of the present invention to provide a menplan molding device that can be applied to blow molding a bottle using a mold.

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

In FIG. 1, the configuration of a blow molding machine is shown. A small piece of synthetic material put into the hopper of the extrusion device (1) is heated and melted, fed into the parison head (2), formed into a parison (3) with an annular cross section, and extruded. Compressed air supplied from the air supply port (4) of the parison head (2) is blown into the hollow part of the parison (3) to keep the shape of the parison (3) from deforming. The parison (3) extruded to a certain length is held in the mold (51), and the bar that protrudes at the same time as the lower end is sealed is held in the bracket (51) provided on one of the molds (5) When the lower end of the parison (3) is sealed, the parison (3) is folded to the other side by compressed air supplied from the air supply port (4). Expands. When the upper part of the parison (3) is cut by the cutter (8), the mold (51 (51 is moved below the mandrel head (9). The blowing mandrel 00 is removed from the mandrel head (9)). It descends and is inserted through the opening of the parison (3), and its lower end and mold [5]
The parison (3) is airtightly sandwiched between the upper part of the parison (3) and the upper part of the blowing mandrel (00). Mold (51 (51) Lower molding pin (12+) from below
passes through the hole in the bracket (7) and rises, forming an outlet having a membrane run as described below. During this time, the supply/discharge port 0.3 of the mandrel head (9)
Compressed air is supplied from 1 to a blowing mandrel (10) and blown into the parison (3) from its tip. The parison (3) is molded into a bottle (1) along the inner shape of the mold (51).
4) is blow molded. Next, blow mandrel 0
0) and the upper forming pin U and the filling mandrel (15+) installed between them descends into the bottle 0 (A). At the same time, the upper forming pin 0υ rises and the lower forming pin (1
21 descends. The filling of the tank (16) is pushed out by a metering cylinder device (17) in a fixed amount and the hose (I8
) is supplied to the filling mandrel (15) and injected into the bottle α. The air inside the bottle (+41 is supplied through the supply and discharge port (
Escape from 131. When the injection is finished, fill mandrel A9
and the blowing mandrel 00) rise, and the bottle (14
The opening of No. 1 is sealed by the mold (51 (head mold ■μ9 provided on top of 51, and the bottle 04) is completed.

At the same time that the mold (51+51) is opened and the bottle round is taken out, the mold (51+51) is moved below the parison head (2).

2 and 3, the structure of the bottle 14) forming apparatus is shown. A clamper 00) (2F1) is provided at the bottom of the mold (5) (5) to clamp and seal the lower end of the parison (3). Mold on one side (
5) The bottom surface of the clamper f2 (1) (20) protrudes downward. Bracket (7) to bend the tab (6)
) is provided. The bracket (7) is provided with a hole ρD through which the lower +S molded pin (12+) can be raised and lowered, and the clamper 1201 F20 is also provided with a hole. A recess (23) is provided in the part where the bottom of the bottle 51+51 (+41 is to be molded) cooperates with the tip (lla') of the upper molding pin to form the outlet (2) of the bottle round. A cylindrical portion (24) for forming the parison (3) into a cylindrical shape along the outer periphery of the lower forming pin (121) is provided below the recessed portion (231).
Cylinder (26) f installed downward on the lower body (25)
It is connected to the Punto (2υ) fixed to the piston rod of the 2G), and extends upwards through the 29 part of the fuselage so that it can be raised and lowered.

Next, we will discuss the effect. As shown in Figure 2, the mold (5
The upper part of the parison (3) clamped by the blowing mandrel (10) that has descended and the mold (51 (51) is sealed, and the lower part of the parison (3) clamped by the clamper (20+ (2)
0) and bracket (7) and are tightly sealed. The parison (3) has sufficient flexibility before molding, and even if there is a hole in the clamper (20) (20), the clamper CI!
01 (20+) can be sealed by bending it with the bracket (7). The upper forming pin Qll descends from the blowing mandrel α0), and its tip (
11a) fits into the recess (23) of the mold (51 (51), holds the parison (3) between them, and molds the upper part of the outlet @. At the same time, the cylinder f261 t26+ operates and the lower molding pin 021 rises, When it rises from the hole of the bracket (7), the 2nd paris (20) (20+) breaks through the paris (6) bent between the bracket (7) and enters the parison (3). The upper forming pin OIJ and the lower forming pin α2 face each other as shown in FIG. 3, and the parison attached to the lower forming pin (+21)
3) is compressed between the two and adhered to the inner middle of the outlet (22) to form a thin membrane run (28).
51 (Mold along the cylindrical part (24+) of 51 and mold the lower part of the outlet (22). At the same time, compressed air is blown from the blowing mandrel (10) and the parison (3) is molded into the bottle a41. , the mold (5) (5) is cooled and when the bottle ooze has hardened slightly, the upper molding pin (1] J
is raised, and the lower forming pin (121 is lowered.) As a result, the bottle H has an outlet (22) having a membrane run (28).
is formed. After that, the filling is injected into the bottle (+41) and sealed. Figure 3 shows the upper and lower molding pins (former J (
This shows a case in which 1,212 bottles are lined up to form one bottle.

As is clear from the above description, according to the present invention, by providing a lower molding pin and an upper molding pin that pierce the bent end, the bottle can be blow-molded and at the same time an outlet having a membrane run can be provided in the bottle. The entire process from forming the parison and bottle to injecting and sealing the filling can be done with one blow molding machine. It is also easy to apply to a machine that only blow molds bottles.

Therefore, it has great practical effects and advantages, such as making it unnecessary to mold the bottle outlet in a separate process and improving productivity.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are explanatory diagrams of the structure and operation of a blow molding machine equipped with an embodiment. Figure 2 is a partial cross-sectional front view showing the main parts of the embodiment. Figure 3 is a membrane plan. FIG. 3 is a vertical cross-sectional view of the main part to be molded. 1 is the extrusion device, 2 is the parin head, throat, 3 is the parison,
4 is an air supply port, 5 is a mold, 6 is a paris, 7 is a bracket, 8
is a cutter, 9 is a mandrel head, 10 is a blowing mandrel, 11 is an upper forming bin, 12 is a lower forming pin, 1
3 is a supply/discharge port, 14 is a bottle, 15 is a filling mandrel,
16 is a tank, 17 is a measuring cylinder device, 18 is a hose, 19 is a helad mold, 20 is a clamper, 21 is a hole,
22 is an outlet, 23 is a recessed portion, 24 is a cylindrical portion, 25 is a body, 26 is a cylinder, 27 is a plate, and 28 is a membrane run. Patent applicant Representative of AIDA ENGINEERING Co., Ltd.
Meeting 1) Keinosuke Figure 1 (4)

Claims (1)

[Claims] A mold that holds a hollow parison, a blow mandrel that moves up and down above the mold, and an upper mold that is installed in the center of the blow mandrel and moves up and down inside the mold. A pin is provided, and a lower molding pin is provided that faces the upper molding pin and moves up and down into the mold from below the mold, and the mold has an upper part of the outlet at the bottom of the bottle cooperating with the upper molding pin to mold the mold. a recessed part, a cylindrical part that forms the lower part of the ejection part in cooperation with the lower forming pin, a clamper that clamps the lower end of the parison, and the lower forming pin moves up and down while bending the edge of the parison protruding from the clamper to one side. 1. A menplan forming device, comprising: a bracket having a hole.