JPH0698632B2 - Mold release method and mold release apparatus for foam molded article - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mold releasing method and a mold releasing apparatus for taking out foamed molded articles in an aligned state to the outside of a molding machine.

[Prior Art] A synthetic resin foam molding machine has a molding die made of a metal mold, and with this molding die, a foam molding product (hereinafter referred to as a molding product).
Are formed. Conventionally, the above-mentioned molding die is provided with an eject pin, and this eject pin is adapted to release a molded product from the molding die opened after completion of molding. Then, when collecting the released molded products, they are collected by dropping them in a bag arranged below the molding mold, or by dropping them on a conveyer or the like similarly arranged below. It is supposed to be shipped to.

However, if the molded product is dropped and collected,
The molded products housed in the mold in the aligned state are broken apart. Therefore, the operator needs to perform a post-process such as packaging the collected molded products one by one, for example, after returning them to the aligned state, and then packaging them in a predetermined number of units. Return to
It was supposed to put an extra burden on the worker. Further, in the recovery by dropping, when the molded product is released from the molding die or dropped, there is a possibility that the molded product may come into contact with a component such as a tie bar provided in the molding machine and be contaminated.

Therefore, for example, Japanese Patent Publication No. 59-21294 and Japanese Patent Laid-Open No. 62-62294
JP-A-270323 has a suction part capable of holding a molded product by vacuum suction, and the suction part is conveyed between molds that have been opened to hold the molded product and then conveyed outside the molding machine. A method and apparatus for collecting and recovering is disclosed. This allows the molding machine to collect the molded products in an aligned state,
The above-mentioned extra burden on workers is eliminated. In addition, since the molded product released from the mold is held and conveyed by the suction portion, it is possible to prevent stains due to contact with components such as the above-mentioned tativa.

[Problems to be Solved by the Invention]

However, in the above-described conventional method and apparatus, when the molded product is sucked and held from the mold, it is necessary to bring the suction portion into contact with the molded product so as to surely suck the molded product. Therefore,
In the above method and apparatus, after the mold is opened to such an extent that the suction unit can be conveyed between the molds, the mold is moved toward the suction unit, or the suction unit is moved to the mold, and then the mold or the suction unit is moved. There is a problem in that the number of steps is increased because it is necessary to move the unit to the position or direction before the movement. Also,
It is necessary to connect suction means such as a vacuum pump to the suction part, and this suction means is a factor that increases the cost of the apparatus.

As described above, the conventional apparatus and method can reduce the burden on the operator and prevent the stain of the molded product, but have the problem of increasing the number of steps and increasing the cost of the apparatus. . Therefore, in the present invention, it is possible to form a foamed molded product which can be constructed at a relatively low price and which can reduce the burden on the operator and prevent the molded product from being soiled without increasing the number of steps. It is an object to provide a mold method and a mold release device.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, a method for releasing a foamed molded article according to claim 1 is formed by clamping a molding die including a movable die such as a core die and a fixed die such as a cavity die. After filling the foamable thermoplastic resin particles in the cavity and heat-expanding with a heating medium such as steam to obtain a foamed molded product, move the eject pin to release the foamed molded product and collect it. In the mold releasing method, after forming the foamed molded product in the cavity part, a storage frame body having a holding part communicating with the cavity part and communicating with both sides facing the movable mold and the fixed mold is provided with a storage frame body. And the foam molded product is accommodated in the holding portion by the movement of the eject pin, and the foam molded product accommodated in the holding portion is stored together with the storage frame body from the mold between the movable mold and the fixed mold to the outside. Transported to a predetermined position Is characterized in that the foam-molded article housed in the holding portion is pushed out from one surface of the housing frame toward the other surface.

In order to solve the above-mentioned problems, a device for releasing a foam-molded product according to a second aspect is formed by a movable mold such as a core mold for forming a cavity by clamping and a fixed mold such as a cavity mold. An eject pin that is provided on the fixed mold side of the mold and that releases the foamed molded product formed in the cavity, and a holding portion that communicates with both surfaces facing the movable mold and the fixed mold corresponding to the cavity. A frame and the storage frame can be conveyed between a movable die and a fixed die, and can be conveyed to the outside from a molding die including the movable die and the fixed die; At a predetermined position from the one surface to the other surface of the housing frame, the foaming molded article housed in the holding part can be extruded, for example, an air cylinder and an extruding means such as an extruding plate. .

[Action]

According to the first and second aspects of the present invention, the molding die including the movable die and the fixed die forms the foamed molded product in the cavity, and the foamed molded product is separated by the eject pin. It is designed to be typed. Further, a storage frame is provided between the movable die and the fixed die so as to be capable of being conveyed, and the storage frame is provided with a holding portion corresponding to the cavity portion.

Therefore, when the storage frame is conveyed between the movable die and the fixed die, the foamed molded product formed in the cavity is released by the eject pin, and the released foamed molded product is removed from the storage frame. It will be moved to the holding part and stored. As a result, the step of accommodating the foamed molded product in the holding portion is performed together with the mold release by the eject pin, and it is not necessary to add a new step for accommodating. Further, the housing in the holding portion by the eject pin makes it unnecessary to provide a suction means such as a vacuum pump in the housing frame, and the apparatus can be configured at low cost.

Further, since the foam-molded product is conveyed together with the storage frame from between the molding dies, contamination due to contact between the foam-molded product and parts of the apparatus is prevented. Further, the foam-molded article conveyed together with the storage frame to the outside between the molding dies is pushed out from one surface of the storage frame to the other surface by the pushing means at a predetermined position. Therefore, when, for example, a mounting table is installed on the pushing side of the above-mentioned predetermined position, the foam-molded products are sequentially extruded to the mounting table, and the foam-molded products are collected in an aligned state, so that It becomes possible to reduce the burden.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 9.

As shown in FIG. 1, the mold release device according to this embodiment is provided in a foam molding machine. This foam molding machine
And a main body supporting portion 2 that supports the main body 1 of the molding machine.
For example, a molding machine frame 3 assembled at an angle or the like
And a cylinder 4 provided in the molding machine frame 3.

The cylinder 4 is horizontally provided at the center of the upper portion of the main body supporting portion 2, and the piston rod 5 serving as the moving portion of the cylinder 4 is mounted on the molding machine main body 1 via the flange 6 provided at the tip portion. It is fixed to one side surface of the moving plate 7 that constitutes it. A plurality of tie bars 8 are slidably provided at the ends of the moving plate 7, and one end of each of the tie bars 8 is fixed to the molding machine frame 3 and the other end thereof is fixed. Are fixed to a fixed plate 9 arranged to face the moving plate 7. As a result, the moving plate 7 moves to the piston rod 5 of the cylinder 4.
It can be moved to any position.

A movable core die 10 is provided on the other side surface of the movable plate 7, and the core die 10 is a cavity die that is a fixed die when the piston rod 5 is fully extended. Abut on 11, core mold 10 and cavity mold
11 and 11 form cavity portions 12 and 12 having the same shape as the molded article 28. The core mold 10 and the cavity mold 11 that form the above-mentioned molding die have hollow portions 10a and 11a formed therein.
10a and 11a communicate with a vacuum pipe, a steam pipe, and a drain pipe, which are not shown.

On the other hand, a large number of holes are formed on the surfaces of the core mold 10 and the cavity mold 11 on which the cavity parts 12 and 12 are formed, and these holes are formed through the hollow parts 10a and 11a and the respective pipes. The cavities 12 and 12 are filled, sucked, and discharged with steam or air as a heating medium.

In addition, the cavity mold 11 is provided with a filling device 13 connected to a hopper or the like (not shown) corresponding to each cavity portion 12, 12, and the filling device 13 is housed in the hopper or the like. The cavity 12 is filled with expandable thermoplastic resin particles such as expandable polystyrene as a raw material. Further, the cavity mold 11 has an eject pin for extruding the molded products 28 ...
14 are movably provided, and these eject pins 14 are arranged at two locations above and below the cavity 12 at one location.

A spring 15 is provided on each of the above eject pins 14 ..., and both ends of this spring 15 are eject pins.
It is fixed at 14 ... And this spring 15
When the eject pin 14 moves toward the main body support portion 2, the eject pin 14 is biased in the opposite direction so that one end of the eject pin 14 and the surface of the cavity mold 11 on the side of the cavity portion 12 are flush with each other. Has become. Also, eject pin 14
The other end of the eject plate that can abut this end
16 are provided in proximity to each other, and one end portions of eject rods 17 for moving the eject plate 16 in the horizontal direction are fixed to both end portions of the eject plate 16.

The eject rods 17, 17 are slidably provided on the fixed plate 9 and the movable plate 7 on the outer peripheral side of the tie bars 8.8. The first and second abutting members 18 are sandwiched between the eject rods 17 and 17 with the moving plate 17 interposed therebetween.
a and 18b are fixed. The first and second contact members 18a and 18b are configured such that when the moving plate 7 moves toward the fixed plate 9, the moving plate 7 and the first contact member 18a come into contact with each other. The moving plate 7 and the second contact member 18b come into contact with each other when the moving plate 7 moves toward the main body supporting portion 2. As a result, the eject plate 16 comes into contact with the eject pins 14 as the moving plate 7 abutting against the second abutting member 18b further moves toward the main body supporting portion 2, and the eject pin 14
Is moved in the direction of the main body supporting portion 2, while the moving plate 7 in contact with the first contact member 18a is further moved in the direction of the fixed plate 9 so that the eject pin 14 is moved.
The contact with ... is released.

In addition, the moving plate 7 when the cavity 12 is formed
Between the fixed plate 9 and the fixed plate 9, and between the eject rod 17 and the core mold 10, a vertically movable endless chain 19 serving as a conveying means is symmetrical with respect to the left and right when viewed from the moving direction side of the moving plate 7. It is arranged. Each of these chains 19
Chain wheel whose upper end is located above the upper eject rod 17.
The chain wheel 20a is suspended on the fixed plate 9a.
It is rotatably provided on a support plate 21 formed on the. The lower end of the chain 19 is in contact with the chain wheels 20b and 20c located below the moving plate 7,
The movement direction of these chain wheels 20b and 20c is changed to the direction of the main body supporting portion 2. And the above chain wheel 20b
20c is rotatably provided on the lower support plate 22.

Further, the above-mentioned chain 19 is suspended on the other chain wheels 20d and 20e on the side of the main body supporting portion 2 than the chain wheels 20b and 20c. One chain wheel 20d includes a motor 2 fixed to the lower support plate 22.
The chain wheel 20e on the other hand is arranged above the chain wheel 20d, and the axis thereof is rotatably held by the air cylinder 24. There is. The air cylinder 24 is used in the molding machine frame 3
It is provided on the support member 25 provided on the chain 19
It is designed to give a certain amount of tension to.

Further, a pushing means is provided on the upper surface of the support member 25, and the pushing means includes a pair of air cylinders 26 capable of moving the piston rods 27 in the horizontal direction, and a tip portion of each piston rod 27. It is provided with an extruding plate 29 for extruding a molded product 28 onto a molded product cradle 31. Article 28 above
Is held by the storage frame body 30, and as shown in FIG. 8, the storage frame body 30 is provided with, for example, four holding portions 30a ... ing. As a result, the molded products 28 are conveyed by the storage frame body 30 in units of four. In addition, the holding part
The number of 30a ... Is not limited to four, and is set to the number corresponding to the number of the cavity portions 12.

Further, the storage frame body 30 has the above-described chain 19 on both side surfaces.
It is fixed to and is moved up and down as the chain 19 moves up and down. At this time, the vertical movement is controlled by a control means such as a sequencer (not shown). In this control means, for example, the lower surfaces of the lower holding portions 30a and 30a are formed on the molded product receiving table 31. When the upper surface coincides with the upper surface, the movement is stopped, the molded product 28 is extruded by the extruded plate 29 of the air cylinder 26, and then the storage frame body 30 is further moved downward to form the lower surfaces of the upper holding portions 30a and 30a. Product stand 31
The movement is stopped and the molded product 28 is pushed out when it coincides with the upper surface of the. Then, these series of operations are performed in conjunction with the movement of the moving plate 7 of the molding machine body 1 and the like, the filling of the expandable thermoplastic particles, the heating, the cooling, the mold opening, and the mold releasing. Has become.

An operation of operating the foam molding machine to form a molded article and placing the molded article on the molded article cradle 31 in the above configuration will be described below.

First, as shown in FIG. 1, the moving plate 7 is moved toward the fixed plate 9 to move the core mold 10 and the cavity mold 11 to each other.
And are clamped to form the cavity portion 12. Then, the cavity 12 is filled with the raw material from the filling device 13. Thereafter, as shown in FIG. 2, foam molding is performed by thermal expansion with steam or the like to form a molded product 28, and the moving plate 7 is moved in the direction of the main body supporting portion 2 via the piston rod 5 and the flange 6 of the cylinder 4. Move and start mold opening. And
When the mold opening is performed to such an extent that the storage frame body 30 fixed to the chain 19 can be inserted between the core mold 10 and the cavity mold 11, the moving plate 7 is once stopped. After this, the third
As shown in the figure, the motor 23 is operated to raise the storage frame body 30 and move the storage frame body 30 between the cavity mold 11 and the core mold 10.

Next, as shown in FIG. 4, the moving plate 7 is again moved in the direction of the main body supporting portion 2, the moving plate 7 is brought into contact with the second contact members 18b, 18b, and the above movement is continued. , The eject plate 16 through the eject rod 17
Is moved toward the main body support portion 2. As a result, the eject plate 16 described above moves with the movement of the eject pins 14 ...
Abutting on the ends of the eject pins 14 and moving these eject pins 14 in the same direction. Then, the molded product 28 is pushed out in the direction of the storage frame 30 by the above-mentioned eject pins 14 and is stored in each holding portion 30a at the same time as the mold release.

When the molded product 28 is completely housed in the housing frame 30, the movable plate 7 is stopped to stop the eject pins 14 ... And the movable plate 7 is moved toward the fixed plate 9 as shown in FIG. The mold clamping is started. At this time, the eject pins 14 ...
It is biased in 16 directions. Therefore, when the moving eject plate 16 is separated from the eject plate 14, the eject pins 14 return to their original positions.

The mold clamping described above is stopped at the origin position where the cavity portion 12 provided on the moving plate 7 approaches the storage frame body 30, and at the same time as returning to this origin position, the storage frame body 30 is actuated by the motor 23 to cause the chain to move. Moved down via 19. When the storage frame 30 is moved below the core mold 10 and the cavity mold 11, the moving plate 7 is moved toward the molding machine main body 1 and the formation of the next molded product 28 is started. become.

On the other hand, the storage frame body 30 moved downward is stopped when the lower surface of the lower holding portion 30a and the upper surface of the molded product receiving table 31 are aligned, as shown in FIG. After this, the air cylinder 26
Is operated to move the extruded plate 29 toward the molded product cradle 31 via the piston rod 27, and the extruded plate 29 pushes the molded product 28 accommodated in the holding portion 30a onto the molded product cradle 31. Become.

Next, the push-out plate 29 is moved to the air cylinder 26 side with respect to the storage frame body 30 so that the storage frame body 30 is moved to the motor 23 as shown in FIG.
Is operated to move downward through the chain 19. Then, this downward movement is performed by the holding portion on the upper side of the storage frame body 30.
It is stopped when the lower surface of 30a and the upper surface of the molded product support 31 coincide with each other. Thereafter, in the same manner as in the procedure for extruding the lower molded product 28 described above, the air cylinder 26 is operated to move the extruded plate 29 toward the molded product receiving base 31 via the piston rod 27, and the extruded plate 29 is extruded. Thus, the molded product 28 housed in the holding portion 30a is pushed out onto the molded product receiving table 31. As a result, the molded products 28 housed in the upper and lower holding portions 30a ...
Both of them are placed on the molded product receiving table 31 in an aligned state. Then, when this pushing out is completed, as shown in FIG. 1, the push-out plate 29 is pulled back toward the main body supporting portion 2 by the operation of the air cylinder 26, and is put into a standby state until the next taking out together with the storage frame body 30.

In this way, since the molded product 28 is conveyed from the molding machine body 1 while being housed in the storage frame 30, for example, the tie bar 8
Contamination due to contact with etc. will be prevented. Also,
The molded product 28 is conveyed to a predetermined position in the storage frame body 30,
Since the extruded plate 29 pushes the molded product onto the pedestal 31, it is collected in an aligned state. As a result, the operator does not need to return the collected molded articles 28 ... to the aligned state, and the extra burden is reduced.

Further, the storage frame body 30 is configured to be held by storing the molded product 28 in the holding portions 30a. Therefore, the storage frame
30 does not require a suction means such as a vacuum pump,
The cost can be reduced. Further, the accommodation in the holding portions 30a is performed together with the mold release by the eject pin 14 which is conventionally performed, so that the process for the accommodation is unnecessary. Therefore, when the molded product 28 is formed by the mold releasing method and the mold releasing apparatus of the present embodiment, the apparatus can be constructed at a relatively low cost and the burden on the operator without increasing the number of steps. It is possible to reduce the above and prevent the stain of the molded product.

In this embodiment, the chain 19 is used to store the storage frame.
30 has been moved, but is not limited to this,
For example, it may be moved by a timing belt or the like. Further, in the present embodiment, the molded product pedestal 31 is used to mount the molded product 28, but the present invention is not limited to this, and for example, the holding portion 30a of the storage frame 30 ...
A rack having a storage unit corresponding to the above may be used. When this rack is used, all the molded products 25 ... Can be collected in an aligned state by one operation of the air cylinder 26.

Further, although the eject pins 14 of this embodiment are moved by the eject plate 16, the present invention is not limited to this. For example, as shown in FIG. The cylinders 32, 32 may be provided, and the eject plates 34, 34 may be provided at the tips of the piston rods 33, 33 of the air cylinders 32, 32. In addition, the number of the above-mentioned air cylinders 32 is such that the eject plate 34 has the eject pins 14 ...
There may be a single number or a plurality of numbers depending on the number of contacts with. In this case, the eject pins 14 ... Can be moved by driving the air cylinders 32 ... Independently regardless of the movement of the moving plate 7 when the mold is opened.

Further, the eject rods 17, 17 supporting the eject plate 34 may be replaced with air cylinders. In this case, as in the case where the air cylinder 32 is provided in the eject plate 16, the movement at the time of mold opening is performed. It is possible to move the eject pins 14 ... By driving the air cylinder by an independent operation regardless of the movement of the plate 7.

〔The invention's effect〕

As described above, the method for releasing a foam-molded product according to claim 1 is such that after the foam-molded product is formed in the cavity, the foam-molded product is communicated with both surfaces corresponding to the cavity and facing the movable mold and the fixed mold. The storage frame having the holding portion is conveyed between the movable die and the fixed die, and the foamed molded article is accommodated in the holding portion by the movement of the eject pin and conveyed to the outside from between the molding die together with the storage frame, The foam molded article housed in the holder is pushed out from one surface of the housing frame to the other surface at a predetermined position.

As a result, the foam-molded product formed in the cavity is released by the eject pin, and the released foam-molded product is moved to and housed in the holding portion of the storage frame. No need to add to. And
Since the housing by the eject pin does not need to provide a suction means such as a vacuum pump in the housing frame, the device can be inexpensively constructed.

Further, since the foam-molded product is conveyed together with the storage frame from between the molding dies, it is possible to prevent the foam-molded product from being contaminated due to contact between the foam-molded product and parts of the apparatus. further,
It is possible to collect the foamed molded product in an aligned state by pushing the foamed molded product from one surface to the other surface of the storage frame body at a predetermined position, and it is possible to reduce the burden on the operator.

As described above, the device for releasing a foam-molded product according to claim 2 is provided on the fixed mold side of a molding mold including a movable mold and a fixed mold that form a cavity by mold clamping, and is formed by the cavity. An eject pin for releasing the foamed molded product, a storage frame body having a holding portion in communication with both surfaces facing the movable mold and the fixed mold corresponding to the cavity portion, and the storage frame body fixed to the movable mold Conveying means capable of being conveyed between the molding die and the molding die, and foam molding accommodated in the holding portion from one surface to the other surface of the storage frame body at a predetermined external position. This is a configuration including an extruding means capable of extruding a product.

As a result, similar to the effect of claim 1, the foam molded article formed in the cavity is released by the eject pin,
Since the released foam-molded product is moved to and housed in the holding portion of the housing frame, it is not necessary to add a new process for housing. Further, since the housing with the eject pin does not need to provide a suction means such as a vacuum pump in the housing frame, the device can be configured at low cost.

Further, since the foam-molded product is conveyed together with the storage frame from between the molding dies, it is possible to prevent the foam-molded product from being contaminated due to contact between the foam-molded product and parts of the apparatus. further,
It is possible to collect the foamed molded product in an aligned state by pushing the foamed molded product from one surface to the other surface of the storage frame body at a predetermined position, and it is possible to reduce the burden on the operator.

[Brief description of drawings]

1 to 9 show an embodiment of the present invention. FIG. 1 to FIG. 7 are partial cross-sectional side views of a foam molding machine provided with a mold releasing device showing a series of operations from the formation of foam molded products to the collection thereof. FIG. 8 is a perspective view of a storage frame body supported by a chain. FIG. 9 is a partial cross-sectional side view of a foam molding machine equipped with a mold releasing device. 1 is a molding machine main body, 2 is a main body supporting portion, 7 is a moving plate,
8 is a tie bar, 9 is a fixed plate, 10 is a core mold (movable mold), 11 is a cavity mold (fixed mold), 12 is a cavity part, 14 is an eject pin, 19 is a chain (conveying means), 20
a, 20b, 20c, 20d, 20e are chain wheels (transportation means), 23 is a motor (transportation means), 26 is an air cylinder (extrusion means), 28 is a molded product (foam molded product), 30 is a storage frame, 30a is a holding part, 3
1 is a pedestal for the molded product.

Claims (2)

[Claims] 1. A foamed thermoplastic resin particle is filled in a cavity formed by clamping a molding die composed of a movable die and a fixed die, and the foamed article is obtained by heating and expanding with a heating medium. In a method for releasing a foamed molded product by releasing the foamed molded product by moving the eject pin, the foamed molded product is formed in the cavity portion, and thereafter, the foamed molded product corresponds to the cavity portion and faces the movable mold and the fixed mold. A storage frame body having a holding portion that communicates with both sides is conveyed between a movable die and a fixed die, and the foamed molded product is accommodated in the holding portion by the movement of the eject pin, and the storage frame body and the molding die are moved to the outside. A method for releasing a foam-molded product, comprising transporting and extruding a foam-molded product housed in a holding portion from one surface of the housing frame to the other surface at a predetermined position. 2. A fixed mold side of a mold composed of a movable mold and a fixed mold that form a cavity by clamping the mold,
An eject pin for releasing the foamed molded product formed in the cavity part, a storage frame body having a holding part communicating with both surfaces facing the movable mold and the fixed mold corresponding to the cavity part, and the storage frame body. Conveying means that can be conveyed between the movable mold and the fixed mold, and can be conveyed to the outside from between the molding dies, and is housed in the holding portion from one surface to the other surface of the storage frame body at a predetermined external position. An apparatus for releasing a foam-molded product, comprising: an extruding means capable of extruding the foam-molded product.