JP3343514B2 - Method and apparatus for continuous production of molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for continuously manufacturing a large number of molded products having a bottom portion opened via a molded top plate as a continuous molded body that is connected back and forth.

[0002]

2. Description of the Related Art For example, as a method or an apparatus for manufacturing a molded article having a honeycomb structure having an open upper end, a known injection molding method and an injection molding apparatus are generally used. As is well known, this type of manufacturing method or manufacturing apparatus has an advantage that a reliable molded product can be obtained because the operation is performed according to a simple and reliable procedure. It can take advantage of its advantages and is used as a highly available method and apparatus.

[0003]

Although the above-mentioned conventional manufacturing method and manufacturing apparatus can fully utilize the advantages depending on the applications, for example, there is a demand for molded products, which is compared with a very large amount of molded products. If the goal is to manufacture at a very low cost and in a very short time, in other words, rather than the demands on accuracy such as the shape and dimensions of the molded product,
In the case where priority is given to production volume, delivery time, cost reduction, etc., it is extremely difficult to cope with the above-mentioned conventional manufacturing method or manufacturing apparatus, and it is necessary to consider introducing a so-called mass production system.

As an example, a molded article A having a honeycomb structure shown in FIG. 2 is a lawn protector for a lawn parking lot which has recently attracted attention. This lawn protector, when parked in a lawn parking lot, lays a lawn protector consisting of a honeycomb structure molded product A on one side, parks on it, and the tires of the car directly It is designed to protect the lawn in the parking lot and prevent it from being pushed. In the case of molded products with a honeycomb structure used for such applications, the requirements for molded products are firstly a huge amount of molded products procurement and the promotion of manufacturing speed are greater than the requirements for accuracy improvement such as shape and dimensions for molded products. There is no doubt that priority is given, and it is difficult to respond to such a demand by a conventional injection molding method. In other words, in order to change the manufacturing method or manufacturing apparatus of the honeycomb structured molded article to a method capable of meeting the above-mentioned requirements, the conventional injection molding method is discarded, and a continuous manufacturing method such as an extrusion method is adopted. There is a need to.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and solves the problem of establishing a mass production system due to the conventional apparatus being an injection molding method. An object of the present invention is to provide a method and an apparatus for continuously manufacturing molded articles capable of realizing an automatic mass production system by adopting a circulation method using a plurality of dies and realizing a continuous manufacturing method.

[0006]

According to a first aspect of the present invention, there is provided a manufacturing method for a plurality of dies which are sent in a matrix in a circulating endless manner. ,
By sequentially injecting and solidifying a solid solution, a method of continuously producing a large number of molded products having a bottom end opened through a molded top plate as a continuous molded body connected back and forth, An extrusion injecting step of injecting a solid solution into the mold while the mold is moving from the starting point of the outward path toward the end point of the movement, and a step in which the injected solid solution solidifies as a molded product, respectively. By removing the continuous molded body from the mold by gradually removing a small dimension downward sequentially from the state of close contact with the molded product with respect to the mold, a removing step at the end point of the outward path is performed. A lowering step of lowering the released mold to just below the end point position, and moving the mold backward along a nearly backward or backwardly inclined returning path provided substantially inclined or downward from the lowered position; Start of outbound journey And a raising step of raising the mold from the immediately lower position to a starting point position of the outward path immediately above the lower position.

According to the manufacturing method of the present invention having the above structure, a large number of molded products having one end (one surface) opened are extruded in the form of a continuous molded body that is connected back and forth through a simultaneously molded top plate. By sequentially injecting the solid solution into the mold from the injection system, a large number of molded products can be manufactured continuously, and as a result, a mass production system can be realized.
Thereby, the manufacturing cost of the molded product can be significantly reduced.

According to a second aspect of the present invention, there is provided a manufacturing apparatus according to a second aspect of the present invention, in which a solid solution is sequentially injected into a plurality of dies which are sent in a matrix in a circulating endless manner. By solidifying and then, a device that continuously manufactures a large number of molded products having a bottom end opened through a molded top plate as a continuous molded body connected back and forth, a) a plurality of the molds A conveying means of a mold for successively and horizontally conveying the mold in close contact with each other, and b) the mold conveying means is disposed above the mold conveying start position of the conveying means of the mold and moves forward. An extrusion injection device for injecting the solid solution, c) disposed on the conveying side of the mold adjacent to the extrusion injection device, presses the upper surface of the solid solution injected into the mold with a predetermined pressure, and continuously. Pressing device for forming on a flat surface, and d) Guide the mold gradually downward using the conveying force of the mold Id means, die removing means for upwardly projecting a plurality of protruding pins that can be retracted into and out of the cavity from the lower surface corresponding to the downward movement of the mold, and e) the removed mold. Circulating means for circulating the mold to the transfer start position of the mold.

According to the manufacturing apparatus according to the second aspect of the present invention, the manufacturing method according to the first aspect can be surely performed, and a plurality of fixed molds can be easily formed, and the mold can be continuously circulated by circulating them. Since the mold can be manufactured at a relatively low cost, a plurality of projecting pins are projected into the cavity of the mold in opposite directions to gradually lower the mold by the guide means. Since the molded product that has been cooled and solidified is extracted, the die is reliably removed.

According to a third aspect of the present invention, the mold is advanced along the guide means while keeping a substantially horizontal state while being sequentially drawn downward from the state of close contact with the molded article by a small dimension. At this time, a guide roller guided by the guide means is rotatably mounted on the mold so that the state of the center axis along the forward direction of the mold is continuously and individually maintained during the forward movement. Is preferred.

According to the manufacturing apparatus of the third aspect, the trajectory of the movement of the mold during the removal process is obtained by combining the movement in the horizontal direction and the movement in the vertical direction for the removal operation.
In other words, it is possible to strongly restrict this in the horizontal direction in response to the tendency that the individual tends to be inclined obliquely downward, and the mold can always be held in the horizontal posture. The adverse effect of the mold being inclined obliquely downward is that when the injected solid solution is not completely solidified, solidification starts with the top surface of the molded product not horizontal and the shape of the molded product And when the mold is pulled downward from the molded product, the directions of the friction surfaces sliding with each other do not match the vertical direction, so that it is difficult to perform a smooth removal operation. It is. All of these problems can be solved very easily by keeping the central axes of the dies during the extraction process individually and horizontally throughout the movement.

According to a fourth aspect of the present invention, a direction is brought into close contact with a plurality of dies which are moving over a specific section of a molding process in which the solid solution is injected while the solid solution is being injected. It is desirable to provide a means for applying the pressing force of (1).

According to the manufacturing apparatus of the fourth aspect, the solid solution is injected in a specific section during the molding process, and the contact surfaces between the adjacent front and rear dies are separated from each other by the injection pressure at that time. Then, a gap is generated therebetween, and the solid solution may leak to the outside from the gap.However, according to the configuration of the present invention, the stroke section before and after the injection of the solid solution is limited, and the By applying the pressing force, leakage to the outside from the gap can be prevented, and the operation of injecting the solid solution can be performed safely and reliably.

The rear end face of the mold in a state where the mold is circulated and returned to the mold transfer start position, and the front end of another mold at the end point of the forward movement. It is preferable to provide a pressing means for pressing the surface from the front and back in the direction of close contact with each other.

According to the fifth aspect of the present invention, the front end face and the rear end face of all the dies in the molding process located at the upper position in the circulation path of the dies are brought into close contact with each other from the front and back. For each operation such as detachment of the mold in the descending process performed in the middle of the circulation process or return of the mold to the manufacturing start position, the device does not hinder the smoothness of the circulation movement of the mold. Can be continued.

According to a sixth aspect of the present invention, the mold is provided with a mold frame comprising a cavity corresponding to the molded product, and one surface of the mold frame is closed, and a plurality of projecting pins can be protruded and retracted into the cavity. An intermediate plate having a plurality of pin holes penetrating therethrough, and an elevating plate having the projecting pins planted toward the intermediate plate and capable of coming and going within a predetermined range with respect to the intermediate plate. Can be. Needless to say, the mold and the intermediate plate closing one surface of the mold can be integrally formed.

According to the manufacturing apparatus of the sixth aspect, the structure of the mold is simple, the elevating plate is combined with the intermediate plate so as to be able to contact and separate within a predetermined range, and the protruding pin is protruded and retracted in the cavity. Since it has a structure, it is easy to handle and the molded product can be easily extracted.

According to a seventh aspect of the present invention, an inner roller and an outer roller are rotatably mounted on the front and rear sides of the mold, respectively, so that the mold is kept horizontal and gradually moves forward and downward. A rail for arranging an inner guide rail for guiding the inner roller and an outer guide rail for guiding the outer roller, and for keeping the elevator plate of the mold movable and horizontal. And one of the holding rollers may be provided below the lower surface of the lift plate or along the inner and outer guide rails, and the other may be provided below the lower surface of the lift plate along the inner and outer guide rails.

According to the manufacturing apparatus of the seventh aspect, in addition to the operation of the apparatus of the third aspect, while the lifting plate is fed forward while being kept horizontal by the cooperative action of the holding roller and the rail, As the mold and the intermediate plate descend simultaneously along the guide rails, a plurality of projecting pins planted on the elevating plate gradually project into the cavity, and the molded product is removed from the mold frame. Will be issued.

According to the present invention, there is provided an elevating mechanism which vertically moves up and down at an end position of the advance passage at an end position of the inner and outer guide rails and supports and lowers the mold. A guide trajectory on which the rollers inside and outside the mold can be placed and which can travel with the lower position of the mechanism as a starting point is horizontally disposed parallel to the advance passage toward the rear, and the mold along the guide trajectory. And a lifting mechanism that supports the mold from the end of the guide track and moves up to the starting point of the forward passage can be provided.

According to the eighth aspect of the present invention, the mold conveyed to the end position of the advance passage is lowered by the elevating mechanism, and conveyed to the end by the belt conveyor along the horizontal guide track, and then the elevating mechanism As a result, the mold can be reliably returned to the starting point of the forward passage.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a method for continuously manufacturing molded articles and an apparatus for manufacturing the same according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall view showing an outline of an apparatus for continuously manufacturing molded articles according to the present invention, and FIG. 2 is a perspective view showing a molded article having a honeycomb structure as an example of the molded article produced by the apparatus shown in FIG. FIG. 3A is a cross-sectional view of the mold and its periphery at the position of line III-III in FIG. 1, and FIG.
FIG. 4 is a cross-sectional view taken along a line I, and FIG. 4 is a cross-sectional view of a die and a main part around the die at a position of a line IV-IV in FIG.

In FIG. 1, the mold 1 in this example has a shape corresponding to a molded product A having a honeycomb structure in which hexagonal cylinders having an open upper end shown in FIG. 2 are continuous, and has a predetermined width (for example, 1000 mm). And has a predetermined length (for example, 200 mm). The plurality of molds 1 are arranged in an endless orbit matrix circulating with the open surface facing upward, and are moved along the circulation passage 2 by various mold moving means provided in the middle of the circulation passage 2. It is circulated and moved. The mold 1 is provided with racks 1a on both sides of the bottom surface, and a pair of outer rollers 1b, 1b at the front left and right positions, and a pair of inner rollers 1c, 1c at the rear left and right positions. The outer roller 1b and the inner roller 1c have the same height and a difference in the amount of lateral protrusion (inner position and outer position). With this configuration,
In the extraction process, inner and outer guide rails 8a and 8b to be described later are used.
The mold 1 can be gradually lowered while always maintaining the posture of the mold 1 in the horizontal direction by the and the inner and outer rollers 1b and 1c.

The circulation passage 2 includes a forward passage 2 as an outward passage.
a, a descending passage 2b, a backward passage 2c as a return passage, and an ascending passage 2d. An extrusion-type solid solution injection device 3 is provided at an upstream position in the forward passage 2a, and a fluid solid solution (for example, a vinyl chloride resin solution) as a raw material of a molded product A is fed from above to the die 1 passing therethrough. It is for extrusion injection. The pressurizing device 4 includes the solid solution injection device 3
It is provided immediately downstream (in front) of the solid solution so as to evenly apply pressure from the top to the solid solution before solidification starts, and has a rotatable pressing roller 4a.

Reference numerals 5a and 5b denote a pair of boosters, which are provided at positions spaced apart in the front-rear direction corresponding to five molds 1 in this example, and have gears 6a and 6b meshing with a rack 1a provided in the mold 1, respectively. I have it. The gear 6a is driven by a motor 7a having a relatively large torque (or a high rotation speed), and the gear 6b is driven by a motor 7b having a relatively small torque (or a low rotation speed). Due to the output difference (or the difference in transport speed) between the motor 7a and the motor 7b, it is possible to apply a pressing force between the driven dies 1 in the direction of bringing them into close contact with each other.

An outer guide rail 8b and an inner guide rail 8c are provided on both left and right sides of the forward passage 2a. The outer guide rail 8b regulates and holds the height position of the outer roller 1b of the mold 1, and the inner guide rail 8c regulates and holds the height position of the inner roller 1c of the mold 1. It is for. By maintaining the height positions of the rollers 1b and 1c of the mold 1 as described above, the state of the central axis along the moving direction of the mold 1 during the movement of the mold 1 during the removal process is changed during the movement. Can be continuously maintained in a horizontal state individually.

The reverse passage 2c is a passage (return) for moving the mold 1 backward from a position lowered through the descending passage 2b.
Then, the reverse passage 2c is configured as a trunk type or a tunnel type, and has a slope of a downward slope so as to descend as the vehicle moves backward, so that the mold 1 is self-propelled by its own weight. In this case, a separate moving means for pushing the mold 1 in the reverse direction is omitted, which contributes to power saving.

The cylinder 9 is provided below the descending passage 2b and reliably receives the mold 1 which has reached the end position of the forward passage (outward passage) 2a, and lowers it to the entrance height of the backward passage (return passage) 2c. It is to make it. Cylinder 10
Is provided below the ascending passage 2d to reliably receive the mold 1 which has reached the terminal position of the reverse passage 2c and to raise it to the entrance height of the forward passage 2a. The cylinder 11 is provided on the inlet side of the forward passage 2a, and presses the rear end face of the mold 1 in the state in which the mold 1 has risen to the starting point of the forward passage 2a via the rising passage 2d in the forward direction. belongs to. On the other hand, the cylinder 12 removes the front end face of the other mold 1 just before descending which is located at the head of the succeeding order after the mold 1 released from the extraction process at the end point of the advance passage 2a descends the descending passage 2b. This is for pressing the cylinder 11 in the opposite direction. That is, the cylinder 11 and the cylinder 12
This is for pressing all the dies 1 in the forward passage 2a sandwiched between the two dies 1 located at the both ends in the direction of close contact with each other from the front and rear. The cylinder 13
This is for feeding the mold 1 that has descended through the descending passage 2b toward the entrance of the reverse passage 2c.

As shown in FIGS. 3 and 4, the mold 1 includes a mold frame 1-1, an intermediate plate 1-2, and a lift plate 1-3.
The mold frame 1-1 has a shape corresponding to the molded product A, and is used to determine the original shape of the mold, and is located above the mold 1 and has a honeycomb structure as described in the embodiment. A
In such a case, as shown in FIG. 2, it is necessary to maintain the uniformity of the thickness of the partition walls (cylindrical walls) by accurately determining the positions of a large number of honeycomb single articles. The intermediate plate 1-2 is located between the mold 1-1 and the elevating plate 1-3, and closes one surface of the mold 1-1, and cooperates with the mold 1-1 to form a mold. It serves as a guide for determining the original shape and extracting the molded product. The lifting plate 1-3 is an intermediate plate 1-2.
And a gap w (see FIG. 4) between the intermediate plate 1-2 and the intermediate plate 1-2 can be increased or decreased within a range where the lowering of the lower end head 14a of the restriction bolt 14 restricts the lowering. Coil spring 15
Is between the lifting plate 1-3 and the intermediate plate 1-2, and when the lifting plate 1-3 is pushed upward (in the direction of arrow Q) against the elastic force of the coil spring 15, the strength of the lifting force is It is possible to stably maintain the width of the gap according to. The protruding pin 16 is implanted upward toward the intermediate plate 1-2 by embedding the head thereof in the elevating plate 1-3, and is provided in an inverted state. When the gap w between the lifting plate 1-3 and the intermediate plate 1-2 increases or decreases, the protruding pins 16 advance and retreat in a plurality of pin holes 17 provided through the intermediate plate 1-2. The tip protrudes from the upper surface of the mold 1-1 or retreats downward. When the tip of the protruding pin 16 projects on the upper surface of the mold 1-1, the molded product A formed on the upper surface of the mold 1-1 is moved to the mold 1-1.
Removed from the upper surface of the The operation of increasing or decreasing the gap w is performed according to the form 1
In a state where the height of -1 is regulated by the outer guide rails 8b and the inner guide rails 8c, the lifting plate 1-3 can be moved up and down by means described below.

The holding roller 18 is configured such that the mold 1 is
, The lower end of the elevating plate 1-3 of the mold 1 is placed in a place where contact interference occurs when the passing position of the mold 1 has reached a position near the end of the extraction process and has been considerably lowered. After the contact interference is started, as the lowering of the mold 1 further progresses, the amount of protrusion of the protruding pin 16 built in the mold 1 increases, and the work of extracting the molded product A proceeds. As a place where the holding roller 18 is installed, for example, a top portion of the reverse passage 2c or a support material can be used.

Next, a mode of continuously manufacturing a molded article A having a honeycomb structure as an example of the molded article by the manufacturing apparatus according to the present embodiment having the above-described configuration will be described. By operating the illustrated manufacturing apparatus, an endless track type matrix including a plurality of molds 1 starts operating along a circulation stroke. By the extrusion type solid solution injection device 3 provided on the upstream side of the forward passage 2a, the solid solution (for example, vinyl chloride resin solution) is individually injected into the mold 1 passing through the installation point of the device 3 from the upper end opening. An injection is performed. Subsequently, a pressurizing device 4 provided immediately downstream of the solid solution injection device 3
Thereby, the solid solution (synthetic resin solution) before the solidification is started is uniformly pressed from the top via the pressing roller 4a.
In this case, the degree of pressurization is determined by the top A1 formed as a strip-shaped flat plate on the top surface of each of a large number of cylindrical honeycomb molded parts formed in the voids provided in the mold 1. , All the honeycomb molded products can be integrally connected, and can be handled as a continuous molded product (a configuration in which the molded product in FIG. 2 is connected upside down), and the connecting plate (top portion) is as thin as possible. The pressure is such that A1 can be obtained, and the thickness of the top portion A1 as a connecting plate can be arbitrarily adjusted by a handle provided in the pressurizing device 4.

The gears 6a, 6b meshing with the rack 1a provided on the lower surface of the mold 1 by a pair of boosters 5a, 5b for the first to fifth molds 1 aligned with the forward passage 2a through this interval. A pressing force is applied to the five dies 1 in a direction of bringing the dies 1 into close contact with each other by using the dies. Leakage of the synthetic resin solution is prevented.

Next, solidification is started by cooling the synthetic resin solution, and a step of extracting the mold 1 from the molded product A is performed. Of the guide rails provided on both left and right sides of the forward passage 2a, the outer guide rail 8b is for regulating and holding the height position of the outer roller 1b provided in the mold 1-1, and the inner guide rail 8c is This is for regulating and holding the height position of the inner roller 1c of the mold 1-1. By holding the height position of each roller of the mold 1-1 in this manner, the mold 1
While passing through the extraction process, the state of the central axis along the moving direction of the mold 1 can be individually and continuously maintained in a horizontal state throughout the movement. At the same time, using the fact that the moving passage of the mold 1-1 is regulated by the guide rail, the elevating plate 1-3 provided at the lower portion of the mold 1-1 so as to be able to move up and down is moved up and down from the outside. As a result, the form 1-
Forcibly increase / decrease the gap w between 1 and the lift plate 1-3,
This is a means for extracting the mold 1 from the molded product A downward.

The structure used in the present embodiment as means for forcing the operation of detaching the mold 1 from the molded product A downward in the step of removing the mold 1 is as follows.

(A) As a configuration of the mold 1, a vertically movable plate 1-3 is provided at a lower portion thereof.

(B) A coil spring 15 which operates between the mold frame 1-1 of the mold 1 and the molded product A and a protruding pin 16 which can be retracted are provided in accordance with the elevation of the elevating plate 1-3. I have.

(C) A holding roller 1 that contacts and interferes with the lower surface of the elevating plate 1-3 of the mold 1 near the end of the extraction process.
8 are provided.

In this embodiment having such a configuration,
The effect of releasing the activated mold 1 from the molded article A is described as the effect when the solid solution state of the synthetic resin solution is fluid at an initial relatively high temperature and the solid solution state is slightly solidified. It is performed in two stages, the action when the state is progressing. First, in the first step, the projecting pin 16 in contact with the synthetic resin solution is used.
Is pulled downward by the elastic force of the coil spring 15 and the weight of the lifting plate 1-3. Next, in the second stage, the holding roller 1 provided separately for the formwork 1-1 which is regulated by the guide rail and continues to descend in the direction of the arrow P (see FIG. 4).
8 stops the lowering of the elevating plate 1-3, so that the protruding pins 16 protrude relatively to the top surface of the mold 1-1, so that the molded product fitted in the mold 1-1. A is forcibly pulled out of the mold 1-1. As described above, the extraction process of the mold 1 is divided into two stages, and is performed in parallel with the progress of solidification of the synthetic resin solution in combination with an appropriate action in each stage. Is automatically performed.

The outer guide rail 8b and the inner guide rail 8c, which have restricted the path of the mold 1 at the end of the extracting step, have already been cut off just before the end, and the holding roller 18 has been cut off. Similarly, the contact is cut off at the position immediately before this, so that the mold 1 that has reached the end portion is reliably received on the upper surface by the cylinder 9 that has been raised by the signal that has sensed the proximity, and After being lowered to the entrance height of the reverse passage 2c, it is fed into the entrance of the reverse passage 2c by the cylinder 13. The reverse passage 2c has a slight downward slope in the reverse direction, and the mold 1 in the reverse passage 2c
The self-propelled reverse can be performed by its own weight, so that there is no need to provide a separate moving means, which contributes to power saving. The mold 1 that has reached the ascending passage 2d after passing through the reverse passage 2c,
It is reliably received by the cylinder 10 and is raised to the entrance height of the forward passage 2a.

The cylinders 11 and 12 move all the dies 1 sandwiched between the two dies 1 located at both ends of the advance passage 2a in the direction of close contact with each other from front to back during the movement of the circulation process. By pressing, each operation such as detachment of the mold 1 in the descending process or entry of the mold 1 in the ascending process performed in the middle of the circulation process,
The operation that enables the operation of the apparatus to be continued without hindering the smoothness of the circulation movement of the device is as described above.

As the material used for the molded article A manufactured by the manufacturing apparatus of the present invention, for example, a material containing a high molecular compound such as vinyl chloride or polyethylene may be used.
An example is a solid solution formed at a temperature of 120 ° C to 70 ° C.

Next, a manufacturing apparatus according to another embodiment of the present invention will be described with reference to the drawings. FIG. 5 is an overall view showing an outline of an apparatus for continuously manufacturing molded articles according to another embodiment. FIG. 6 is a perspective view showing a molded article having a honeycomb structure as another example of the molded article produced by the production apparatus of FIG. FIG. 7A is a cross-sectional view of the mold and its periphery at the position of line VII-VII in FIG. 5, and FIG. 7B is a cross-sectional view taken along line II-II of FIG. ,
FIG. 8 is a cross-sectional view of the die and a main part around the die at the position of line VIII-VIII in FIG.

As shown in FIG. 6, the molded product A 'to be manufactured is provided with a U-shaped notch A3 at the top of each hexagonal cylindrical wall A2 having an open upper end. It is different from the molded product A having the structure. Notch A3
Is provided so as not to inhibit the lawn roots of the target lawn parking lot from extending in the horizontal direction, and is used for lawns of different types. For this reason, the mold 1 'is different from the mold 1 in that a continuous mold portion is provided at the position of the notch A3 in correspondence with the molded product A', but is basically common.

The manufacturing apparatus of this embodiment differs from that of the first embodiment in the following points. That is, as shown in FIG. 5, FIG. 7, and FIG. 8, a pair of holding rollers 18 'are arranged at the intermediate position in the length (progression) direction on the lower surface of the elevating plate 1-3 at intervals in the width direction. The horizontal rail 19 is supported near the position where the inner and outer guide rails 8a and 8b are disposed.
Laying through. On the other hand, the coil spring 15 around the limiting bolt 14 is omitted, and the protruding pin 16 is arranged to push up the position of the cylindrical wall A2 of the molded product A 'from below. This is because, when the molded product A 'is pushed up by the protruding pins 16, even if the pushing-up force is increased, the molded product A' is pushed up at a portion having a large strength so as not to damage the molded product A '. The holding roller 18 'is provided at a middle position on the lower surface of the elevating plate 1-3 in the descending passage 2b of the mold 1'.
This is so that when the holding roller 18 'comes off from the rail laid below, the mold 1 can smoothly descend without sliding contact with peripheral members.

In this embodiment, the reverse passage 2c is provided between the inner and outer rollers 1
A guide track 21 for traveling of b · 1c is horizontally arranged, and a belt conveyor 22 for conveyance is provided along the guide track 21 instead. The widthwise central portion of the lower surface of the elevating plate 1-3 comes into contact with the upper traveling portion (belt) 22a of the belt conveyor 22, and the mold 1 is conveyed to the lower end of the ascending passage 2d as the belt 22a travels. . In addition, in order to ensure that the mold 1 is conveyed by the belt conveyor 22, a device is provided for separating the lifting plate 1-3 from the intermediate plate 1-2 downward. That is, a bearing roller 23 is rotatably mounted on the center of both side surfaces of the elevating plate 1-3, and near the entrance of the reverse passage 2c at the lower end of the descending passage 2b,
As shown in FIG. 1, the inclined guide portion 24 is provided, and the bearing roller 23 is guided along the inclined side of the inclined guide portion 24, whereby the elevating plate 1-3 is forced downward from the intermediate plate 1-2. They are separated and have gaps. A similar inclined guide portion 25 is also provided near the entrance of the forward passage 2a at the upper end of the ascending passage 2d, and the bearing roller 23 of the elevating plate 1-3 pushed up by the cylinder 10 is guided by the inclined guide portion 25, and the ascending and descending is performed. The plate 1-3 is forcibly separated downward from the intermediate plate 1-2.

Although the above is the main difference from the manufacturing apparatus of the first embodiment, the description is omitted because other configurations are common. Here, with respect to the manufacturing apparatus according to the second embodiment, an aspect of continuously manufacturing a molded article A ′ having a honeycomb structure will be described below.

Basically, in common with the manufacturing mode according to the first embodiment, the synthetic resin solution is filled into the mold 1-1 of the mold 1 from the extrusion / injection device 3, and The pressing roller body 4a uniformly presses the synthetic resin solution before the solidification starts from the top, and is integrally joined by a top A1 formed as a strip-shaped flat plate on the top surface, and is continuously molded (see FIG. 2). The form in which the molded product is connected upside down) is continuously molded. During this time, a pair of boosters 5a, 5 is provided to the fifth mold 1 aligned with the forward passage 2a.
b, the gears 6a and 6b meshing with the rack 1a provided on the lower surface of the mold 1 are used to apply a pressing force in a direction of bringing the five molds 1 into close contact with each other.
Leakage of the synthetic resin solution from the contact surface between the molds 1 due to the pressure during extrusion injection is prevented.

While the mold 1 'is conveyed to the left in FIG. 5, solidification is started by cooling the synthetic resin solution, and subsequently, the mold 1' from the molded product A ' Is performed. Forward passage 2 as described above
A rail 19 is provided from a substantially intermediate position in the longitudinal direction of the gear a, and the mold 1 'conveyed by the meshing rotation of the gears 6a and 6b is a holding roller 18' provided on the lower surface of the elevating plate 1-3. Contacts the rail 19, and the mold 1 'is conveyed while the holding roller 18' rotates. Inner and outer guide rails 8
The mold 1-1 and the intermediate plate 1-2 of the mold 1 are gradually lowered while being held horizontally (the height position is lowered). On the other hand, since the holding roller 18 'on the lower surface of the lift plate 1-3 is running in contact with the rail 19, the vertical position of the lift plate 1-3 is kept constant. The elevating plate 1-3 approaches the frame 1-1 and the intermediate plate 1-2, and the large number of projecting pins 16 push up the position of the cylindrical wall A3 of the molded product A 'from below. 1 'is extracted from the formwork 1-1. In other words, since the vertical position of the molded product A 'does not change and moves horizontally to the left in FIG. 5, the mold 1' is removed from the molded product A '.

Then, the holding roller 18 'of the mold 1' is disengaged from the rail 19, and the mold 1 'is maintained substantially horizontal along the descending passage 2b (the holding roller 18' substantially moves the mold 1 '). (With the function of holding horizontally). Mold 1 '
The inner and outer guide rollers 8b and 8c are placed on the guide track 21, and at the same time, the bearing roller 23 is guided by the inclined guide portion 24, the lifting plate 1-3 is separated downward, and the upper belt of the belt conveyor 22 is moved. Contact the running part 22a,
The mold 1 ′ is conveyed by the belt conveyor 22 through the reverse passage 2c. Then, the mold 1 is raised by the cylinder 10 along the ascending passage 2d, and returns to the starting point of the advancing passage 2a.
The lifting plate 1-3 is guided downward by contact with the lifter 5 and returns to its original state. The above operation is repeatedly and continuously performed, and the plurality of molds 1 ′ are sequentially circulated to produce a continuous body of the molded product A ′.

The embodiment of the present invention has been described. For example, the mold 1.1 ′ is a mold body having an integral structure in which an intermediate plate 1-2 is fixed to the lower surface of a mold frame 1-1. The elevating plate 1-3 can be combined with the lower surface of the main body so as to be able to contact and separate within a predetermined range.

[0052]

As is apparent from the above description, the method and the apparatus for continuously manufacturing a molded product according to the present invention include:
There are the following excellent effects.

(1) According to the manufacturing method of the first aspect, both the application of the solid solution extrusion method and the application of the continuous flow method by circulating a plurality of dies are possible, and as a result, a mass production system is realized. Therefore, compared with the case of manufacturing by a conventional manufacturing method (mainly, an injection molding method), acceleration of the manufacturing speed and reduction of the product cost are realized.

(2) In the manufacturing apparatus according to claim 2, claim 1
In addition to being able to reliably carry out the manufacturing method according to the present invention, since a plurality of fixed molds can be easily formed and continuously formed by circulating them, the production cost of the molds becomes relatively inexpensive, and guide means are used. Since a plurality of projecting pins are projected into the cavity of the mold corresponding to the opposite direction to gradually lower the mold, and the cooled and solidified molded product is extracted, the die is reliably removed.

(3) According to the third aspect of the present invention, when the solidification of the molded article starts during the manufacturing process and when the mold is in the step of extracting the mold from the molded article, the attitude of the mold is always the horizontal attitude. Can be held. As a result, there is no irregularity in the shape of the molded product, and a so-called good-looking molded product is obtained.When the mold is pulled downward from the molded product, the direction of the sliding friction surface matches the vertical direction. In addition, the extraction operation is very easily performed.

(4) According to the fourth aspect of the present invention, the solid solution is injected in a specific section during the molding process. At that time, the contact surfaces between the adjacent front and rear dies are separated by the injection pressure. Thus, it is possible to reliably prevent a gap from being generated or a solid solution from leaking from the gap to the outside, and to perform a solid solution injection operation safely and reliably.

(5) According to the fifth aspect of the present invention, the front end surface and the rear end surface of all the dies in the molding process located at the upper position in the circulation path of the dies are closely attached to each other from the front and rear. By pressing in the direction, for each operation such as removal of the mold at the time of descending performed during the circulation process, or entry of the mold in the ascending process, the device does not hinder the smoothness of the circulation movement of the mold. It is possible to safely continue driving.

(6) According to the sixth aspect of the present invention, the structure of the mold is simple, the lifting plate is combined with the intermediate plate so as to be able to contact and separate within a predetermined range, and the protruding pin projects and retracts in the cavity. Therefore, the handling is easy and the molded product is easily extracted.

(7) In the invention according to claim 7, in addition to the operation of the device according to claim 3, while the lifting plate is fed horizontally while being kept horizontal by the cooperative action of the holding roller and the rail, As the mold and the intermediate plate descend simultaneously along the guide rails, a plurality of projecting pins planted on the elevating plate gradually project into the cavity, and the molded product is removed from the mold frame. Will be issued.

(8) In the invention according to claim 8, the mold conveyed to the end point of the forward passage is lowered by the lifting mechanism,
After being conveyed to the end by the belt conveyor along the horizontal guide track, the mold can be surely returned to the starting point position of the advance passage by the elevating mechanism.

[Brief description of the drawings]

FIG. 1 is an overall view showing an outline of an apparatus for continuously manufacturing a molded product according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a molded article having a honeycomb structure as an example of a molded article manufactured by the manufacturing apparatus of FIG.

3 (a) is a cross-sectional view of the mold and its periphery at the position of line III-III in FIG. 1, and FIG. 3 (b) is a cross-sectional view taken along line II of FIG. 3 (a). It is.

FIG. 4 is a cross-sectional view of a die and a main part around the die at the position of line IV-IV in FIG. 1;

FIG. 5 is an overall view showing an outline of an apparatus for continuously manufacturing a molded product according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing a molded article having a honeycomb structure as another example of the molded article manufactured by the manufacturing apparatus of FIG. 5;

7 (a) is a cross-sectional view of the die and its periphery at the position of line VII-VII in FIG. 5, and FIG. 7 (b) is a cross-sectional view cut along line II-II of FIG. 7 (a). It is.

FIG. 8 is a cross-sectional view of a die and a main part around the die at the position of line VIII-VIII in FIG. 5;

[Explanation of symbols]

 1.1 'Mold 1-1 Mold (mold main body) 1-2 Intermediate plate (mold main body) 1-3 Elevating plate 1a Rack 1b Outer roller 1c Inner roller 2 Circulation path 2a Forward path (outward path) 2b Downward Passage 2c Reverse path (return path) 2d Up path 3 Extruded body injection device 4 Pressurizing device 4a Press roller 5a / 5b Booster 6a / 6b Gear (pinion) 7a / 7b Motor 8b Outer guide rail 8c Inner guide rail 9,10,11 , 12, 13 Cylinder (elevating mechanism) 14 Limiting bolt 15 Coil spring 16 Protruding pin 17 Pin hole 18 ・ 18 ′ Holding roller 19 Rail 21 Guide track 22 Belt conveyor 23 Bearing roller 23 24 ・ 25 Inclined guide section A ・ A ′ Molded product

Claims (8)

(57) [Claims] 1. A bottom end is opened through a molded top plate by sequentially injecting and solidifying a solid solution into a plurality of molds sent in a circulating endless manner in a matrix. A method for continuously manufacturing a large number of molded products as a continuous molded body connected back and forth, wherein the plurality of molds move forward from the start point of the forward path toward the end point of the movement, the molds An extrusion injecting step of injecting the solid solution into the mold, and, while the injected solid solution is solidifying as a molded product, gradually reducing the size of each of the molds in order from the state of close contact with the molded product by a small amount. A removing step of removing the continuous molded body from the mold by releasing the mold; a descending step of descending the mold released from the extracting step at the end point of the outward path to just below the end point position; Near horizontal or below A returning step of moving the mold backward along a backward movement path provided in an inclined manner and returning to a position immediately below a starting point of the forward path; and And a step of ascending. 2. A bottom end is opened through a top plate to be molded by sequentially injecting and solidifying a solid solution into a plurality of dies that are sent in a matrix in a circulating endless manner. It is an apparatus for continuously manufacturing a large number of molded products as a continuous molded body connected back and forth, and a mold conveying means for horizontally conveying the plurality of molds in series in a state of being in close contact with each other and horizontally. An extrusion-injection device disposed above the mold-conveying start position of the mold-conveying means and configured to inject the solid solution into the forward-moving mold; and conveying the mold adjacent to the extrusion-injection device. Side, and presses the upper surface of the solid solution injected into the mold with a predetermined pressure to continuously form the flat surface, and gradually presses the mold using the conveying force of the mold. Guide means for guiding downward, and from the lower surface corresponding to the downward movement of the mold in a reverse direction. A plurality of projecting pins that can be inserted into and retracted from the cavity, and a mold circulating unit that circulates the extracted mold to a transfer start position of the mold. Continuous manufacturing equipment for molded products. 3. The method according to claim 1, wherein the mold moves along the guide means from the state of being in close contact with the molded product to the lower part in order to keep a substantially horizontal state while being drawn downward by a small dimension.
A roller guided by the guide means is rotatably mounted on the mold so that the state of the center axis along the forward direction of the mold is maintained individually and horizontally during the forward movement. An apparatus for continuously manufacturing a molded product according to claim 2. 4. A means for applying a pressing force in a direction in which a plurality of molds moving in a direction of bringing them into close contact with each other from front and rear over a specific section of a molding step of moving forward while the solid solution is being injected. The apparatus for continuously producing a molded product according to claim 2, wherein the apparatus is provided with: 5. Between the rear end face of the mold in a state where the mold is circulated and returned to the mold transfer start position and the front end face of another mold at the end point position of the forward movement, 4. The apparatus for continuously manufacturing a molded product according to claim 2, further comprising pressing means for pressing the front and rear sides in a close contact direction. 6. A mold comprising a cavity corresponding to the molded product and a plurality of pins which close one surface of the mold and through which a plurality of projecting pins penetrate so as to be able to protrude and retract into the cavity. 3. The molded product according to claim 2, comprising: an intermediate plate having a hole formed therein; and an elevating plate having the projecting pins planted toward the intermediate plate and capable of coming and coming within a predetermined range with respect to the intermediate plate. Continuous production equipment. 7. An inner roller and an outer roller are rotatably mounted on the front and rear sides of the mold, respectively, so that the mold is maintained horizontal and gradually moves forward and downward.
An inner guide rail that guides the inner roller and an outer guide rail that guides the outer roller, respectively, and a rail and a holding roller for maintaining the lift plate of the mold movable and horizontally. On one side, below the lower surface of the lift plate or along the inner and outer guide rails,
7. The apparatus according to claim 3, wherein the other is provided along the inner and outer guide rails below or on the lower surface of the elevating plate. 8. A lifting mechanism which vertically moves up and down at the end position of the forward passage at the end position of the inner and outer guide rails and supports and lowers the mold is provided. The descent position of the lifting mechanism is set as a starting point. A guide track on which the rollers inside and outside the mold can be placed and which can be run is disposed horizontally and parallel to the forward passage toward the rear, and a belt conveyor for transferring the mold is provided along the guide track. 8. The apparatus according to claim 3, further comprising an elevating mechanism for supporting the mold from the end of the guide track to ascend to the starting point of the advance passage.