JP3249659B2 - Short filler for foam molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art While the mechanism of a foam molding machine is complicated in order to obtain higher production efficiency and convenience, the space of a factory is limited, and a more compact machine is required more than ever. In order to respond to the demands of such an era, various devices have been devised for foam molding machines, and various types of fillers have been proposed as fillers.

For example, as shown in FIG. 6, the filler itself is of a split type and is of a one-touch type (hereinafter referred to as a long filler (B ″)). There is a short filler (B ') that is short and easy to handle. As shown in FIG. 1, the portion where the filler is mounted is a portion 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. Short filler with short overall length in the future due to its properties and space saving at the time of mounting
(B ') is promising.

[0004] The long filler (B ") shown in FIG.
The filler body (5 '') of the long filler (B '') is attached to the filler sleeve (2 '') protruding from the back of the filler body (5 ''). The long drive cylinder (8 '') protrudes. In the case of the long filler (B ''), as shown in FIG. 6, when filling the raw material beads (14 '') into the cavity (1 ''), the opening and closing rod head (30 '') is filled with the filler sleeve (2 ''). ''), And after filling the raw material beads (14 ''),
This is to match the cavity surface of (3 ''). In this case, the filling of the raw material beads (14 '') is easy because the opening / closing rod head (30 '') is pulled out from the filler sleeve (2 '') when filling the raw material beads (14 ''). However, the amount of movement of the opening / closing rod head (30 '') increases, and accordingly, the amount of movement of the piston (8b '') of the long drive cylinder (8 '') also increases, and the cylinder cylinder (31 '') Becomes longer. As a result, when the long filler (B '') is attached to the filler sleeve (2 ''), there is a problem that the cylinder body (31 '') protrudes greatly rearward, and the foam molding machine has to be enlarged accordingly. Was.

FIG. 5 shows a short filler (B ') proposed for this. In this case, a filler cylinder insertion hole (4a') (4b ') formed in a mold (3'). 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
This opens and closes the opening (24a ') at the tip end of (6'), and therefore the reciprocating stroke of the piston (8b ') of the drive cylinder (8') is also reduced. Therefore, in the case of the short filler (B '), not only the overall length can be shortened, but also the projection length when attached to the filler sleeve (2') becomes 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 ') and the opening / closing rod head provided at the tip thereof are always contained in the filler cylinder (6').
(30 ') and the passage for bead pressure feeding (7')
However, there is a problem that a large amount of the raw material beads (14 ') is obstructed by pumping.

In addition, a compressed air jetting cylinder (24 ') for pumping the raw material beads (14') must be provided in the bead pumping passage (7 '). The effective area required for pumping the raw material beads (14 ') is long filler (B'')
There is a problem that it becomes very narrow as compared with. In addition, as shown in the figure, the compressed air jetting cylinder (24 ') is
(7 '), the compressed air is also unevenly distributed, causing a bias in the ejection of compressed air, and the cavity of the raw material beads (14')
There is a problem that the filling of (1 ′) is also uneven.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional example, and has as its object to reduce the unevenness of the filling of the raw material beads and to reduce the length of the filler protrusion at the time of mounting. Accordingly, an object of the present invention is to provide a filler for a foaming molding machine which exhibits excellent effects in handleability in a place where many obstacles exist and space saving of the foaming molding machine.

[0008]

A short filler (B) for a foam molding machine according to the present invention comprises a filler cylinder (6) mounted so as to communicate with a mold cavity (1), and a filler cylinder. The drive cylinder (8) mounted on the free end side of (6), and the piston (8b) mounted on the piston (8b) of the drive cylinder (8)
A piston rod (8a) that moves with the reciprocation of the piston rod (8a) attached to the tip of the piston rod (8a),
(6) Opening / closing rod head (3
0), a bead pressure feeding passage (7) formed between the filler cylinder (6) and the piston rod (8a), and an opening / closing rod head.
(30) is constituted out with compressed air ejection passage which opens (24) to
Piston locks for short fillers for foam molding machines
Opening of the compressed air jet passage (24) drilled in the hole (8a)
Part (24a) is formed on the side surface of the opening / closing rod head (30).
Mold on the side of groove (30b) facing one mold (3)
(3) It is characterized in that it is open in the direction .

[0009]

[Effects] The male and female molds (3) and (11) must be replaced when the foam molding lot is switched. First, loosen the filler fixing body (17) provided on the filler-mounting mold (3). Then, the filler cylinder (6) of the filler body (5) is pulled out from the mold (3) on the filler mounting side. 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 filler mounting mold (3), and insert the filler cylinder (6) with the filler fixing body (17). Adhere 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 ''), the protrusion of the mold (3) from the back plate (13a) is extremely small. Become smaller. When the mounting of the short filler (B) to the mold (3) is completed, the drive hose (32) (33), the air hose for bead injection (26), the bead feeding hose (40), etc. Connect the hoses. When the hoses are connected, the foaming operation is started.First, compressed air is sent to the compressed air ejection passage (24), and compressed air is sent from the tip opening (24a) to the mold (3). Into the cavity (1) of the raw material beads (14)
Supply to When the supply of raw material beads (14) is completed,
Operate the piston (8b) in reverse to close the insertion-side tip opening (6a) of the filler cylinder (6) with the opening / closing rod head (30), followed by the steam chamber of the mold (3) (11). High-temperature steam is supplied to (15), and the raw material beads (14) are heated and foamed to obtain a foam molded body (36) having the shape of the cavity (1). After allowing the foamed molded body (36) to cool for an appropriate time, the core mold (11) is opened from the parting surface, and the eject mechanism is opened.
By operating (34), the foam molded article (36) is protruded from the cavity (1) to obtain a foam molded article (36). When the foam (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 foam (36). When this lot production is completed, it returns to the initial procedure,
Replace with the next lot production mold (3) (11).

[0010]

In the above operation, the compressed air jetted from the front end opening (24a) is blown toward the mold (3) through the bead pressure feeding passage (7), and the raw material beads (14) are moved to the mold cavity ( Pump to 1). When the supply of the raw material beads (14) is completed, the piston rod (8a) is reversely operated, and the opening / closing rod head (30) is inserted into the insertion-side tip opening (6a) of the filler cylinder (6) to open the opening. However, the closing also closes the distal end opening (24a) and stops the ejection of the compressed air. Subsequently, high-temperature steam is supplied to the steam chamber (15) of the mold (3) (11), and the raw material beads (14) are heated and foamed to form the cavity (1).
To obtain a foam molded article (36). Thus, the supply of the raw material beads (14) and the control of the compressed air can be simultaneously performed by a slight reciprocating operation of the piston rod (8a). In addition, since the compressed air is blown out from the side of the opening / closing rod head (30), it flows uniformly throughout the bead pressure feeding passage (7), and the raw material beads (14) uniformly flow into the cavity (1). Filling can be achieved.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
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. A movable core mold (11) and a fixed cavity mold (3) are installed in the main body of the foam molding machine (A).
And a tie bar (3
The core mold (11) is attached to and separated from the cavity mold (3).

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

The filler fixing body (17) is not particularly limited, but has a split fastening type as shown in FIG.
Are fixed to the back plate (13a) by bolts, and the mold-side filler cylinder (6) is fastened and fixed by the split ring portion (19). Packing (not shown) is interposed on the outer periphery of the parting surfaces of the core mold (11) and the cavity mold (3) to prevent steam leakage.

As shown in FIG. 2, a short filler (B) is provided at the center of the front surface of the filler body (5) in the form of a cylindrical filler tube.
(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). Are located in the vicinity of the open end. The piston (8b) is driven by a forward air hose (32) attached to the rear end of the cylinder cylinder (31) and a retreat air hose (33) attached to the front end of the cylinder cylinder (31). ing.

The filler body (5) is formed with a bead feeding hole (9) diagonally, and as shown in FIG. 1, a bead feeding hose (40) is connected to the hoch (41) and the bead feeding hose. Through hole for grain (9)
And are connected.

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

The piston rod (8a) is formed with a passage (24) for compressed air ejection which penetrates the piston rod (8a) and opens to the opening / closing rod head (30). FIG. 3 shows a passage (24) for blowing compressed air that opens in the opening / closing rod head (30).
FIG. 4 is a partial cross-sectional view of the tip opening (24a) of the tip opening (24a).
a) is a V-groove (30) formed on the side of the opening / closing rod head (30).
An opening is formed in a surface facing one mold (3) direction of b), and is formed obliquely with respect to the piston rod (8a). (26) is a bead injection air hose, which is connected to the compressed air supply cylinder (25). (7) is the filler cylinder
This is a bead pressure feeding passage formed between (6) and the piston rod (8a).

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

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

At the time of molding, the piston rod (8a) is retracted to open the front end opening (6a) of the filler cylinder (6) on the insertion side, and the raw material beads (14) are filled into the cavity (1). However, at the same time as the retraction of the piston rod (8a), the beads supply air is supplied and the compressed air is blown out from the opening (24a) at the tip end of the compressed air ejection passage (24) so that the raw material beads (14)
Is supplied and filled into the mold cavity (1).

The tip opening (24a) is uniformly opened on the side surface of the opening / closing rod head (30).
The compressed air ejected from a) uniformly flows through the bead pressure feeding passageway (7) to feed the raw material beads (14) into the cavity (1), thereby uniformly filling 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 advanced again so that the filler cylinder (6)
The insertion side tip opening (6a) is closed, and the supply of the raw material beads (14) is stopped. At this time, the tip opening (24a) opening on the side surface of the opening / closing rod head (30) enters the insertion-side tip opening (6a) and is closed. Is stopped.

Subsequently, high-temperature steam is supplied to the steam chamber (15) of the molds (3) and (11), and the raw material beads (14) are heated and foamed to form a foam (36) having the shape of the cavity (1). 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 remove the foam molded body (36) from the cavity (1). It protrudes to obtain a foam molding (36). When the foam (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 foam (36).

[0025]

According to the present invention, since the compressed air ejection passage penetrates the piston rod and opens at the opening / closing rod head, the compressed air is always supplied to the filler cylinder regardless of the attachment / detachment of the filler. There is an advantage that the material beads are ejected to the center so that the raw material beads are not unevenly filled in the cavity.

Further, since the opening / closing rod head is located near the opening end of the filler cylinder and opens and closes, the cylinder stroke can be shortened, so that the entire length of the filler can be shortened as well as the filler is mounted on the filler sleeve. There is also an advantage that the projecting length of the short filler at that time is shortened accordingly, so that the length of the device can be shortened, which can contribute to space saving. Furthermore, it is formed on the side of the opening / closing rod head.
On the surface of the V-groove that faces one mold direction
The opening of the opening and closing rod is open
When it enters the opening on the insertion side and closes it,
The supply of compressed air is stopped at the same time as the supply of
Will be.

[Brief description of the 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 and a mold-side filler sleeve according to the present invention before being mounted.

FIG. 3 is an enlarged sectional view of a first embodiment of the opening / closing rod head according to 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 feeding passage (14) ... material beads (23) ... bead feeding air nozzle hole (24) ... compressed air ejection passage (24a) ... tip opening of compressed air ejection passage (30) ... opening and closing rod head

Claims (2)

(57) [Claims] 1. A filler cylinder mounted to communicate with a mold cavity, a driving cylinder mounted on a free end side of the filler cylinder, and mounted on a piston of the driving cylinder to move with reciprocating motion of the piston. A piston rod, an opening / closing rod head mounted on the tip of the piston rod for opening and closing the die insertion side end of the filler cylinder, and a bead pump formed between the filler cylinder and the piston rod. For a foam molding machine, which is composed of a passage for air and a passage for blowing compressed air that opens in the head of the opening / closing rod.
Of the compressed air jet passage formed in the piston rod
One of the V-grooves formed on the side of the opening / closing rod head
Open in the mold direction on the surface facing the other mold direction.
Foam molding machine short filler, characterized in that that. 2. The method according to claim 1, wherein a front end opening of the compressed air ejection passage formed in the piston rod is opened in a mold direction on a side surface of the opening / closing rod head. Short filler for foam molding machine.