JP3610051B2 - Mold replacement method for foam resin molding machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of foamed resin molding machines , and in particular, the attachment of a steam supply pipe, a drain pipe, and the like is changed from a conventional master frame to a newly configured steam chamber frame, A mold structure that can quickly change the mold and shorten the exchange time by holding the feeder and release pin (commonly called ejector) on the back plate that can be separated from the steam chamber frame . The present invention relates to a mold changing method for a foamed resin molding machine.
[0002]
[Prior art]
Conventionally, as shown in FIG. 3, the mold structure used for foaming resin molding mainly has a molding space for foaming resin by matching a matching male mold (convex mold) am and female mold (concave mold) af. A pair of male and female molds a to be formed, a master frame b disposed so as to hold the periphery of the mold a, and a steam chamber (commonly called chamber) c on the back side of the mold a together with the master frame b And a back plate g for partitioning. The master frame b includes a steam supply pipe d for supplying foaming steam, a water supply pipe e for supplying cooling water into the mold, and a drain pipe f for discharging condensate and cooling water from the mold. Each is attached. The back plates g arranged opposite to each other are supported by a foamed resin molding machine (hereinafter, “molding machine”, not shown), and one side is fixedly arranged as a fixed side back plate gf. The side is configured as a moving back plate gm that translates horizontally when the mold a is opened and closed.
[0003]
[Problems to be solved by the invention]
By the way, in the mold exchange of the conventional mold structure, since the master frame b is formed according to the mold a having a specific shape, the master frame b is usually exchanged together with the mold a. There was a need to do. To remove the master frame b, it was necessary to separate the steam supply pipe d, the water supply pipe e, and the drain pipe f connected thereto.
Further, the fixed back plate gf is provided with a raw material filler h for supplying the foaming raw material into the mold a and a release pin i for extruding and discharging the foamed molded product from the female mold af. It is necessary to remove and attach these each time when changing the mold. Since this penetrates the steam chamber c, it is necessary to pay attention to ensuring airtightness when reattaching.
[0004]
As described above, conventionally, every time the mold is replaced, it is necessary to perform complicated setup work such as removal / attachment of the steam supply pipe d, the water supply pipe e, the drain pipe f, the raw material filler h, and the release pin i. It was lost. In particular, in recent years, the number of molded products has become diversified, and the demand for high-mix low-volume production has become remarkable. The length of this mold replacement setup operation has a direct impact on manufacturing costs, and the simplicity and speed of these mold replacements has been reduced. It has become an issue.
[0005]
【the purpose】
Accordingly, the present invention has been made paying attention to the above-mentioned problems, and is provided with a steam chamber frame that comes into airtight contact with the master frame, to which a steam supply pipe and a drain pipe are connected and fixedly supported by the molding machine. Foamed resin molding that enables easy and quick replacement of molds by integrally handling a master frame that holds a pair of male and female molds and a back plate attached to the back of one mold. The present invention provides a mold changing method for a new foamed resin molding machine equipped with a mold structure for use.
[0006]
[Means for Solving the Problems]
In order to solve the above object, the present invention is configured as follows.
First, a mold structure for molding a foamed resin according to the present invention includes a pair of male and female molds (1) forming a foamed resin molding section by conforming contact, and the pair of male and female molds (1) can be attached and detached. Each of the master frames (2) to be held together, and each of the master frames (2) is hermetically joined to form a steam chamber (9), and a steam supply pipe (5) and a drain pipe (7) are respectively provided. The connected steam chamber frame (3) and the opening (31) formed in one steam chamber frame (3f) so as to face the mold (1f) are hermetically closed so as to be able to come in contact with and separate from the steam chamber (9) side. A back plate (8) integrally attached to the back side of the mold (1f) with a predetermined separation distance on the steam chamber (9) side, and exposed from within the opening (31) of the back plate (8) Raw material filler (10) held through in the part And and release pin (11), consist.
[0007]
In addition, the mold replacement method of the mold structure for foaming resin molding is such that the back plate (8) holding the raw material filler (10) and the release pin (11) is connected to the mold (1f) on one side. A pair of male and female molds (1), which are integrated and held on the master frame (2), are treated as a single unit, and this is joined together from the steam chamber frame (3) to the master frame (2). By separating, the mold is exchanged .
[0008]
In the attachment to the steam chamber frame of the master frame of the mold exchange method (2) to be held a pair of male and female molds (1) (3), a steam chamber frame (3) and the master frame (2) The steam chamber frame (3) and the master frame (2) are hermetically joined to each other by the auto-clamp mechanism (4) disposed in the contact portion (20, 30) with the back plate (8) on one side. The opening (31) formed in the steam chamber frame (3f) is hermetically closed .
[0009]
The mold replacement method of the foam resin molding machine having the mold structure for foam resin molding is as follows. After mold matching is performed on the upper side and the foam resin molding process is performed, the mold is opened to hold the molded product In a mold exchanging method in a foamed resin molding machine configured to discharge a molded product after moving the side mold to the lower side, the mold in a state where a pair of males and females are held by the master frame (2) It is characterized in that (1) is handled as a single unit, and this is held by the steam chamber frame (3) moving to the lower side, moved to the lower side, and then replaced.
[0010]
In addition, the reference numerals in parentheses described in the section of the claims and means for solving the problems are added with reference numerals for reference to facilitate understanding of the configuration of the invention. Of course, it is not limited to the form.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view illustrating a mold structure for molding a foamed resin according to the present embodiment. FIG. 2 is a cross-sectional view illustrating a mold replacement method for the foamed resin molding machine according to the present embodiment.
[0012]
The mold 1 which is the main part of the mold structure in the present embodiment is itself the same as the conventional one, and resin is formed by matching the matching male mold (convex mold) 1f and female mold (concave mold) 1m. It forms a molding space for foaming. A plurality of vent holes (not shown) for supplying foaming steam into the mold are formed on the surface constituting the mold 1. The mold 1 is held by a substantially box-shaped master frame 2 arranged so as to surround the periphery thereof. The master frame 2 and the mold 1 are formed separately from each other. When the mold is exchanged from a molding machine, which will be described later, the master frame 2 and the mold 1 are fastened with bolts or the like and are handled as one unit.
[0013]
Box frame-like steam chamber frames 3 each having a peripheral end surface 30 hermetically joined to the peripheral end surface 20 are disposed on the back side of each master frame 2, 2 (opposite the mold mounting side). ing. The joining state of the master frame 2 and the steam chamber frame 3 is maintained by the fastening means 4. For this purpose, for example, an existing contact fastening mechanism such as a fitting contact means via an airtight seal material or a pressure-bonding mechanism by applying external force by lever operation by bolt fastening or lever operation is used. In addition, a mechanism that automatically fits and maintains airtightness with a predetermined crimping force simply by abutting at a predetermined speed, for example, an existing auto-clamp mechanism, can save more labor and speed. .
[0014]
Further, as described above, each steam chamber frame 3 in which the female mold 1f and the male mold 1m are arranged via the master frame 2 has a fixed-side steam chamber frame 3f (hereinafter referred to as a fixed-side steam chamber frame 3f) supported on a molding machine in a fixed state. And a moving-side steam chamber frame 3m (hereinafter referred to as “moving frame”) that moves horizontally in parallel each time the mold is opened and closed, and is held by the molding machine. In this embodiment, a female die 1f is attached to the fixed frame 3f, and a male die 1m is attached to the moving frame 3m. Further, an opening 31 having a predetermined shape is formed in a portion of the fixed frame 3f facing the mold 1f, and the opening 31 is in airtight contact with the back plate 8 described later so as to be closed. A close contact means (not shown) is formed on the inner edge (die arrangement side) 32 of the opening 31. For example, as the contact means, there is a sealing means through an airtight seal material, or a fitting contact mechanism.
Furthermore, the steam supply pipe 5 and the water supply pipe 6 that function in the same manner as the conventional example are connected to the fixed frame 3f, and the drain pipe 7 is connected to the lower side.
[0015]
Next, a plate-like back plate 8 separated from the female mold 1f by a predetermined distance is provided on the back side (the side opposite to the mold-matching surface) of one mold 1 (in the illustrated embodiment, the female mold 1f). Are arranged via a connecting plate 80. The connection plate 80 has a communication port 81. By this communication port 81, the space on the front and back sides partitioned by the connecting plate 80 (the partition space of the master plate 2 and the fixed frame 3f and the back side space of the female mold 1f) is communicated. The back plate 8 is integrally attached to the female mold 1f via the connecting plate 80, and is handled as an integral part when the mold is replaced. The back plate 8 airtightly closes the opening 31 of the fixed frame 3f from the inside when the master frame 2 and the fixed frame 3f are joined. As a result, a space defined by the back side of the female mold 1f, the master frame 2, the fixed frame 3f, and the back plate 8 through the communication port 81 forms a steam chamber (chamber) 9 in which steam is formed. Steam from the supply pipe 5 is filled, and condensate and cooling water in this space are discharged from the drain pipe 7.
[0016]
The portion of the back plate 8 exposed in the opening 31 holds the raw material filler 10 and the release pin 11 that function in the same manner as the conventional example in a penetrating state. When the mold is exchanged, the raw material filler 10 and the release pin 11 are handled together with the female mold 1 f and the back plate 8.
[0017]
On the other hand, the moving frame 3m is not provided with a back plate, and a steam chamber 9 is formed by the back side of the male mold 1m and the master frame 2. Similarly to the fixed frame 3f, the steam supply pipe 5, the water supply pipe 6, and the drain pipe 7 are connected to the moving frame 3m.
[0018]
Next, a mold replacement method using the mold structure of this embodiment will be described.
The mold exchanging method having the mold structure of the present invention can be applied to a normal molding machine in which the opening / closing movement of a pair of male and female molds is only in the horizontal direction, but rather a mold matching process. , Raw resin filling process, foam resin molding process, and mold opening process (hereinafter referred to as “molding process”) are performed by horizontal movement on the upper side of the molding machine, and the molded product is discharged after mold opening (hereinafter referred to as “molding process”). In the so-called “two-layer molding machine”, in which the “discharge process”) is performed on the lower side by vertically moving the mold on the molded product holding side (or moving up and down), it becomes more convenient. .
[0019]
In addition to the two-layer structure molding machine as described above, the molding process is performed by horizontal movement, and the discharge process is performed in the left-right direction such as the direction perpendicular to this (in the direction other than the mold-matching / mold-opening movement direction). The present invention can also be applied to a molding machine that is moved. Therefore, in the present embodiment showing the mold changing method from the molding machine described below, a case where the molding machine M having the two-layer structure is applied will be described. The specific configuration of the molding machine M having the two-layer structure has been disclosed by the applicant of the present application as Japanese Patent Laid-Open No. 10-52830, and the detailed configuration is omitted.
[0020]
First, the moving frame 3m in the opposed positional relationship is moved closer to the fixed frame 3f, and the pair of male and female molds (1f, 1m) to be exchanged are matched. Next, the fastening means 4 such as an auto clamp mechanism is released, and only the moving frame 3m is separated from the master frame 2 and horizontally moved (separate moving direction when the mold is opened).
[0021]
Next, the fixed frame 3f holding the male and female integrated mold 1 held by the master frames 2 and 2 is translated downward. In the following description, the fixed frame 3f of the molding machine M having the second floor structure will be referred to as “vertical moving frame”.
[0022]
The vertically moving frame 3f is moved to the vicinity of the floor surface F, and the held male and female integrated mold 1 is placed and fixed on a carriage 12 previously arranged on the lower floor surface F. After confirming the fixing, the fastening means 4 such as the auto clamp mechanism is released to separate the master frame 2 from the vertically moving frame 3f. Accordingly, the back plate 8 that hermetically closes the opening 31 formed in the vertical movement frame 3f is also separated from the vertical movement frame 3f.
[0023]
As a result, the cart 12 includes a male and female integrated mold 1 attached to the master frame 2, and a back plate 8 that holds the raw material filler 10 and the release pin 11 and is attached to the female mold 1f. Placed in an integrated state. In this mounted state, the carriage 12 is moved and replaced with another mold. These attachments may be performed in the reverse order of the above. When an auto-clamp mechanism is used for the fastening means 4, since the fastening is performed simply by positioning and abutting, the molds can be replaced more quickly and workability can be improved.
[0024]
【effect】
As described above, according to the mold replacement method of the foamed resin molding machine having the mold structure of the present invention, the steam chamber frame is provided in airtight contact with the master frame, and the steam supply pipe and the drain pipe are connected thereto. Since it is fixedly supported by the molding machine, it is necessary to remove and install these steam filling pipes, drain pipes, raw material filling machines, and release pins, etc. The complicated work to say can be omitted.
[0025]
In addition, the master frame for holding the pair of male and female molds and the back plate attached to the back of the mold on one side can be handled in an integrated manner so that the molds can be exchanged easily and quickly.
[0026]
As a result, it is possible to respond quickly to requests for frequent mold changes due to high-mix low-volume production, while improving workability such as shortening the setup time, which ultimately leads to a reduction in manufacturing costs and is industrial. A novel invention is provided.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a mold structure for molding foamed resin according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view for explaining a mold exchanging method of the foamed resin molding machine according to this embodiment.
FIG. 3 is a cross-sectional view showing a conventional mold structure for molding foamed resin.
[Explanation of symbols]
1 Mold 1f Female mold (one mold)
1m Male 2 Master frame 20 Peripheral end face 21 Edge face (~ of opening)
3 Steam chamber frame 3f Fixed frame (fixed side steam chamber frame)
(Or vertical motion frame)
3m moving frame (moving side steam chamber frame)
30 Peripheral end face 31 Opening 32 Edge inner face 4 Fastening means (auto clamp mechanism)
5 Steam supply pipe 6 Water supply pipe 7 Drain pipe 8 Back plate 80 Connection plate 81 Communication port 9 Steam chamber (chamber)
10 Raw Material Filler 11 Mold Release Pin 12 Cart F Floor Surface M Second Floor Forming Machine [Conventional Example]
a Mold af Female mold am Male mold b Master frame c Steam chamber
d Steam supply pipe e Water supply pipe f Drain pipe g Back plate gf Fixed back plate gm Moving back plate h Raw material filler i Release pin

Claims (1)

A pair of male and female molds (1) forming a foamed resin molding section by conforming contact;
Each master frame (2) for holding the pair of male and female molds (1) detachably;
A steam chamber frame (3) which is hermetically joined to each of the master frames (2) to form a steam chamber (9), and to which a steam supply pipe (5) and a drain pipe (7) are respectively connected;
An opening (31) formed on one steam chamber frame (3f) so as to face the mold (1f) is hermetically closed so as to be able to come in contact with and separate from the steam chamber (9) side, and at a predetermined position on the steam chamber (9) side. A back plate (8) integrally attached to the mold (1f) with a separation distance;
A raw material filler (10) and a release pin (11) that are penetrated and held in a portion exposed from the opening (31) of the back plate (8) to form a mold structure for foaming resin molding,
A foamed resin molding machine configured to perform mold molding on the upper side and perform the foamed resin molding process, then open the mold and move the mold on the molded product holding side to the lower side before discharging the molded product In the mold change method in
After the mold (1) held by the master frame (2) and the pair of males and females are handled as a single body, the mold (1) is held by the steam chamber frame (3) that moves to the lower side and moved to the lower side. A mold replacement method for a foamed resin molding machine, characterized in that the mold is replaced.

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