JPH0796534A - Short filler for foam molding machine - Google Patents

Abstract

(57) [Summary] [Objective] The object of the present invention is to handle the material beads in a place where there are many obstacles by reducing the unevenness of the filling of the raw material beads and shortening the protruding length of the filler at the time of mounting. Another object of the present invention is to provide a filler for a foam molding machine, which exhibits excellent effects in saving space in the foam molding machine. [Structure] The filler cylinder (6) is mounted so as to communicate with the mold cavity (1), and is mounted on the drive cylinder (8) on the free end side of the filler cylinder (6). An opening / closing rod head (30) for opening / closing the die insertion side end of the filler cylinder (6) is formed at the tip of the piston rod (8a) of the piston (8b). A bead pressure feeding passage (7) is provided between the filler cylinder (6) and the piston rod (8a), and is for jetting compressed air that opens into the opening / closing rod head (30) in the piston rod (8a). Aisle (24) formed

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of short filler for foam molding machines.

[0002]

2. Description of the Related Art The mechanism of a foam molding machine is complicated in order to obtain higher production efficiency and convenience, but the space of a factory is limited, and the machine is required to be more compact than ever. In order to meet the demands of the times, various innovations have been made in foam molding machines, and various types of fillers have been proposed as fillers.

For example, as shown in FIG. 6, the filler itself is a split type and one-touch type (hereinafter referred to as a long filler (B ″)), or the filler full length shown in FIG. 5 is used. There is a short filler (B ') that has been shortened for easier handling. As shown in FIG. 1, the part where the filler is attached is a part where the respective members behind the cavity mold (3) in which the eject mechanism (34) is arranged are arranged in a complicated manner, which is convenient for handling. The short filler has a shorter overall length in the future due to its flexibility and space saving during installation.
(B ') looks promising.

The long filler (B '') of FIG. 6 is a mold (3 '').
The filler body (5 '') of the long filler (B '') is designed to be attached to the filler sleeve (2 '') protruding from the back of the filler body (5 ''). Long drive cylinder (8 '') is protruding. As can be seen from FIG. 6 in the case of the long filler (B ″), when the material beads (14 ″) are filled in the cavity (1 ″), the opening / closing rod head (30 ″) is inserted into the filler sleeve (2 ″). '') And position it at the rear position, and after filling the raw material beads (14 ''), move it forward and move it to the mold.
It is designed to match the cavity surface of (3 ''). In this case, it is easy to fill the raw material beads (14 '') because the opening / closing rod head (30 '') is pulled out from the filler sleeve (2 '') when filling the raw material beads (14 ''). However, the movement amount of the opening / closing rod head (30 '') is increased, and accordingly, the movement amount of the piston (8b '') of the long drive cylinder (8 '') is also increased, and the cylinder cylinder (31 '') Becomes that much longer. As a result, when the long filler (B '') is attached to the filler sleeve (2 ''), the cylinder barrel (31 '') protrudes significantly rearward, and the foam molding machine is inevitably increased in size. It was

FIG. 5 shows a short filler (B ') proposed for this, but in this case, the filler cylinder insertion holes (4a') (4b ') formed in the mold (3'). It is to be inserted into the mold, and the filler cylinder (6 ′) is fixed by the mold (3 ′) at the filler fixing portion (17 ′). The characteristic part of the short filler (B ') is
The opening / closing rod head (30 ') is located near the opening of the filler cylinder (6'), and the filler cylinder can be used with a short stroke.
The front end opening (24a ') of (6') is opened and closed, which reduces the reciprocating stroke of the piston (8b ') of the drive cylinder (8'). Therefore, in the case of the short filler (B '), not only can the overall length be shortened, but the protruding length when mounted on the filler sleeve (2') will be extremely short, which is effective in suppressing the overall length of the foam molding machine. is there. However, as can be seen from the figure, the piston rod (8a ') is always inside the filler cylinder (6') and the opening / closing rod head provided at its tip.
(30 ') and because it is located, bead pressure passage (7')
However, there is a problem that it becomes difficult to pump a large amount of the raw material beads (14 ′).

In addition, a compressed air jetting cylinder (24 ') for pressure-feeding the raw material beads (14') must be provided in the bead pressure-feeding passage (7 '), and the bead pressure-feeding passage (7'). ) The raw material beads (14 ') have a long effective filler area (B'')
There is a problem that it becomes very narrow compared to. In addition, as shown in the figure, the compressed air jet cylinder (24 ') is connected to the beads pressure passage.
The uneven distribution of compressed air in the part of (7 ') causes unevenness in the jetting of compressed air, and the cavity of the raw material beads (14')
There is also a problem in that the filling into (1 ') is uneven.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned conventional example, and the object thereof is to make the filling of raw material beads uniform and to shorten the protruding length of the filler at the time of mounting. Accordingly, it is an object of the present invention to provide a filler for a foam molding machine, which exhibits an excellent effect in handleability in a region where many obstacles are present and space saving of the foam molding machine.

[0008]

The short filler (B) for a foam molding machine according to the present invention comprises a filler cylinder (6) mounted so as to communicate with the mold cavity (1), and a filler cylinder. A drive cylinder (8) mounted on the free end side of (6) and a piston rod (8a) mounted on the piston (8b) of the drive cylinder (8) and moving with the reciprocating motion of the piston (8b).
An opening / closing rod head (30) attached to the tip of the piston rod (8a) to open and close the end of the filler cylinder (6) on the mold insertion side, and the filler cylinder (6) and the piston rod. It is characterized in that it is constituted by a bead pressure-feeding passageway (7) formed between (8a) and a compressed air jetting passageway (24) opening to the opening / closing rod head (30).

[0009]

[Function] Then, when changing the lot of foam molding, the male and female molds (3) (11) must be replaced, but first, loosen the filler fixing body (17) provided on the filler mounting side mold (3). , The filler cylinder (6) of the filler body (5) is pulled out from the filler mounting side mold (3). Next, the male and female molds (3) and (11) are removed, and the male and female molds (3) and (11) for the next lot are mounted on the foam molding machine (A). Insert the filler cylinder (6) into the filler mounting holes (4a) (4b) of the new mold (3) for the filler mounting side, and then use the filler fixing body (17) to insert the filler cylinder (6) into the filler mounting side. Stick to the mold (3). In this case, since the drive cylinder (8) of the short filler (B) is much shorter than the long filler (B '') described above, the protrusion amount from the back plate (13a) of the mold (3) is extremely short. Becomes smaller. When the installation of the short filler (B) into the mold (3) is completed, the filler hose (5) has a drive hose (32) (33), a bead injection air hose (26), a bead feeding hose (40), etc. Connect the hoses. When the connection of hoses is completed, the foam molding work is started.First, the compressed air is sent to the compressed air ejection passage (24), and the compressed air is directed from the tip opening (24a) toward the mold (3). Cavity (1) of raw material beads (14)
Supply to. When the supply of raw material beads (14) is completed,
The piston (8b) is reversely operated to close the opening end (6a) on the insertion side of the filler cylinder (6) with the opening and closing rod head (30), and then the steam chamber of the mold (3) (11). High temperature steam is supplied to (15) to heat and foam the raw material beads (14) to obtain a foam molded article (36) in the shape of the cavity (1). After cooling the foamed molded body (36) for an appropriate time, the core mold (11) is opened from the parting surface, and the eject mechanism is
The foam molded article (36) is ejected from the cavity (1) by operating the (34) to obtain the foam molded article (36). When the foamed molded body (36) is taken out and the cavity (1) is emptied, the core mold (11) is closed, and the previous molding step is repeated to continuously mold the foamed molded body (36). When the production of this lot is completed, we will return to the first procedure,
Replace with the next lot production mold (3) (11).

The second aspect of the present invention defines the opening position and direction of the tip end opening portion (24a) of the compressed air jetting passage (24) in the opening / closing rod head portion (30), which is formed in the piston rod (8a). It is characterized in that a tip end opening portion (24a) of the provided compressed air jetting passageway (24) is opened toward the mold (3) at a side surface of the opening / closing rod head portion (30).

The compressed air ejected from the tip opening (24a) is blown toward the mold (3) through the bead pressure feeding passage (7), and the raw material beads (14) are pressure-fed to the mold cavity (1). To do.
When the supply of the raw material beads (14) is completed, the piston rod (8
Reverse the operation of a) to move the opening / closing rod head (30) to the filler cylinder.
The opening is closed by inserting it into the insertion-side tip opening (6a) of (6), and the closure also blocks the tip opening (24a), and the ejection of compressed air is stopped. Then the mold (3)
High temperature steam is supplied to the steam chamber (15) of (11), and raw material beads (14)
By heat-foaming the foamed body (3) in the shape of the cavity (1).
Get 6). As a result, the material beads (14) can be supplied and the compressed air can be controlled at the same time with a slight reciprocating operation of the piston rod (8a). In addition, since compressed air is ejected from the side surface of the opening / closing rod head (30), it uniformly flows over the entire bead pressure-feeding passage (7), and the raw material beads (14) are evenly distributed to the cavity (1). Filling can be achieved.

[0012]

The present invention will be described in detail below with reference to the illustrated embodiments.
FIG. 1 is a front view of a foam molding machine (A) to which the short filler (B) according to the present invention is applied, and FIG. 2 is a drawing relating to the short filler (B) of the present invention. Inside the body of the foam molding machine (A), the movable core mold (11) and the fixed cavity mold (3)
And tie bars (3
The core mold (11) is attached to and detached from the cavity mold (3).

The cavity mold (3) is composed of a cavity mold (12) forming the inner surface of the mold, a back plate (13a), and a side plate (not shown) connecting the two, and the inner cavity is It is a steam room (15). The cavity mold (12) and back plate (1
Filler insertion through holes (4a) and (4b) are formed in 3a), and a filler fixing body (17) is installed in the back plate (13a).

Although the filler fixing body (17) is not particularly limited, it has a split tightening type as shown in FIG.
Are fixed to the back plate (13a) by bolts, and the split ring portion (19) is used to tighten and fix the mold side filler cylinder (6). A packing (not shown) is provided on the outer peripheries of the parting surfaces of the core mold (11) and the cavity mold (3) to prevent vapor leakage.

As shown in FIG. 2, the short filler (B) has a cylindrical filler tube portion at the center of the front surface of the filler body (5).
(6) is mounted, a double-acting drive cylinder (8) is mounted coaxially with the filler cylinder (6) at the rear of the filler body (5), and the piston of the drive cylinder (8) is mounted. The piston rod (8a) extended from (8b) is inserted into the filler cylinder (6), and the opening / closing rod head (30) at the tip of the piston rod (8a) is the filler cylinder (6). Is located near the open end of. The piston (8b) is driven by an advancing air hose (32) attached to the rear end of the cylinder tube (31) and a retracting air hose (33) attached to the front end of the cylinder tube (31). ing.

Further, a bead granulation through hole (9) is obliquely formed in the filler body (5), and the bead granulation hose (40) is connected to the hoch (41) and the bead granulation hole (40) as shown in FIG. Through hole for grains (9)
And are connected.

A piston rod (8a) is mounted on the piston (8b) of the drive cylinder (8).
At the tip of (8a), the insertion side tip opening (6a) of the filler cylinder (6)
An opening / closing rod head (30) for opening and closing is attached.
The piston rod (8a) penetrates the piston (8b) and is slidably inserted into a compressed air supply cylinder portion (25) projecting from the rear portion of the cylinder cylinder body (31).

A passage (24) for ejecting compressed air is formed in the piston rod (8a) so as to penetrate the piston rod (8a) and open to the opening / closing rod head (30). FIG. 3 shows a passage (24) for jetting compressed air, which opens at the opening / closing rod head (30).
2 is a partial cross-sectional view of the tip opening (24a) of FIG.
a) is a V groove (30) formed on the side surface of the opening / closing rod head (30).
A hole is formed in the surface of b) facing the direction of one of the molds (3) and is formed obliquely with respect to the piston rod (8a). (26) is an air hose for injecting beads, which is connected to the cylinder part (25) for supplying compressed air. In addition, (7) is a filler cylinder
A bead pressure-feeding passage formed between (6) and the piston rod (8a).

In foam molding, however, the molds (3) and (11) must be replaced when changing lots.
First, the filler fixing body (17) is loosened, the tightening of the split ring portion (19) is released, and the filler cylinder (6) is pulled out from the filler insertion through holes (4a) and (4b). At this time, the raw material beads (14) in the bead feeding hose (40) are blown back to the hopper (41).
The raw material beads (14) from the filler cylinder (6) returned to
There is no eruption of.

Next, the molds (3) (11) are removed, the molds (3) (11) for the next lot are mounted on the foam molding machine (A), and the filler for the new cavity mold (3) is loaded. Insert the filler cylinder (6) into the insertion holes (4a) (4b), tighten the split ring part (19) of the filler fixing body (17), and attach the short filler (B) to the mold (3). To do. This operation is performed with filler insertion holes (4a) (4
Do as many as b).

At the time of molding, the piston rod (8a) is retracted to open the insertion-side end opening (6a) of the filler cylinder (6) to fill the raw material beads (14) into the cavity (1). However, bead feeding air is supplied at the same time as the piston rod (8a) is retracted, and compressed air is ejected from the tip end opening (24a) of the compressed air ejection passage (24) to produce the raw material beads (14).
Is supplied and filled in the mold cavity (1).

Here, the tip opening (24a) is uniformly formed in the side surface of the opening / closing rod head (30), and the tip opening (24a)
The compressed air ejected from a) uniformly flows through the bead pressurizing passage (7) and sends the raw material beads (14) into the cavity (1) to uniformly fill the raw material beads (14) into the cavity (1). .

When the supply / filling of the raw material beads (14) is completed, the piston rod (8a) is moved forward again to move the filler tubular body (6).
The tip end opening (6a) on the insertion side is closed, and the supply of the raw material beads (14) is stopped. At this time, the tip opening (24a) opened on the side surface of the opening / closing rod head (30) enters the insertion side tip opening (6a) and is blocked, and at the same time as the supply of the raw material beads (14) is stopped, compressed air is discharged. Will be stopped.

Subsequently, high temperature steam is supplied to the steam chamber (15) of the molds (3) and (11) to heat and foam the raw material beads (14) to form a foamed molded product (36) in the shape of the cavity (1). To get After cooling the foam molded body (36) for an appropriate time, the core mold (11) is opened from the parting surface, and the eject mechanism (34) is operated to move the foam molded body (36) from the cavity (1). This is extruded to obtain a foamed molded product (36). When the foamed molded body (36) is taken out and the cavity (1) is emptied, the core mold (11) is closed and the foamed molded body (36) is continuously molded by repeating the previous molding step.

[0025]

According to the present invention, since the passage for jetting the compressed air penetrates the piston rod and opens at the head of the rod for opening and closing, the compressed air always flows in the filler cylinder regardless of whether the filler is attached or detached. There is an advantage in that the material beads are blown out to the center, and uneven distribution does not occur in filling the raw material beads into the cavity.

Furthermore, since the opening / closing rod head is located near the opening end of the filler cylinder for opening and closing, the cylinder stroke can be shortened, and the total length of the filler can be shortened by that much, and the filler sleeve is mounted. There is also an advantage that the projecting length of the short filler at that time can be shortened by that much, and the device length can be shortened, which contributes to space saving.

[Brief description of drawings]

FIG. 1 is a front view of a foam molding machine according to the present invention.

FIG. 2 is a cross-sectional view of a filler body, a mold-side filler sleeve, and a filler body according to the present invention before mounting.

FIG. 3 is an enlarged sectional view of a first embodiment of the opening / closing rod head of the present invention.

FIG. 4 is a front view of a filler fixing body used in the present invention.

FIG. 5 is a cross-sectional view of a conventional short filler.

FIG. 6 is a cross-sectional view of a conventional long filler.

[Explanation of symbols]

 (A)… Foam molding machine (B)… Short filler for foam molding machine (1)… Cavity (3)… Cavity mold (5)… Filler body (6)… Filler cylinder (7)… Bead pressure passage (14) ... Raw material beads (23) ... Bead feeding air nozzle hole (24) ... Compressed air jet passage (24a) ... Compressed air jet passage tip opening (30) ... Opening and closing rod head

Claims (2)

[Claims] 1. A filler cylindrical body mounted so as to communicate with a mold cavity, a drive cylinder mounted on the free end side of the filler cylindrical body, and a piston of the drive cylinder mounted to move together with the reciprocating motion of the piston. Piston rod, a rod head for opening and closing, which is attached to the tip of the piston rod and opens and closes the mold insertion side end of the filler cylinder, and a bead pressure feed formed between the filler cylinder and the piston rod. A short filler for a foam molding machine, characterized in that the short filler for a foam molding machine is constituted by a flow passage for compressed air and a passage for ejecting compressed air that opens at a head portion of an opening / closing rod. 2. The method according to claim 1, wherein a tip end opening portion of the compressed air jetting passage formed in the piston rod is opened in a mold direction on a side surface of the opening / closing rod head portion. Short filler for foam molding machines.