JP2004306614A - Molding/trimming apparatus, mold for molding/triming and molding/trimming method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance manufacturing efficiency when a molded product of good quality is manufactured continuously. <P>SOLUTION: The molding/trimming apparatus is constituted so that a heated and softened thermoplastic sheet S1 is pressed and held to the periphery of the opening part 42a of a female mold 41 by a locator (holding member) 45, which is opposed to the opening part 42a of the female mold 41 to be moved toward the female mold 41 in order to press the same, and the held thermoplastic sheet S1 is closely brought into contact with the inside surface 42b of the female mold by differential pressure molding to form a molded product while the periphery of the molded product, which is pressed and held to the locator 45, is pressed by a Thomson blade (cutting blade) 48, which is arranged to the periphery of the locator 45 to be moved toward the female mold so as to press the same, to cut the molded product. By this constitution, a trimming position is not shifted, the irregularity of wall thickness after molding is reduced, a cutting blade receiving part can be formed into a simple structure and production efficiency at the time of the continuous manufacture of the molded product of good quality can be enhanced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a molding trimming apparatus, a molding trimming mold, and a molding trimming method for performing trimming by molding a heat-softened thermoplastic sheet by differential pressure molding.

Conventionally, this type of molding trimming device arranges a heat-softened thermoplastic sheet in an opening of a predetermined molding female mold, and closely contacts the inner surface of the molding female mold by differential pressure molding such as vacuum pressure molding. After forming the molded article, the molded article is transferred to a trimming machine. The trimming machine is provided with a Thomson blade, and performs trimming by pressing the Thomson blade against a cut portion of a thermoplastic sheet on a receiving plate made of resin such as PP. In addition, when the Thomson blade is replaced due to wear or the like, it is necessary to uniformly press the thermoplastic sheet. Therefore, uneven work for finely adjusting the height of the blade is performed.
Further, techniques disclosed in Japanese Patent Nos. 31939833 and 2849352 are also known. In this technology, an annularly arranged elastic member that clamps a heat-softened thermoplastic sheet around an opening of a female mold for molding, and a male blade that is annularly arranged inside the elastic member are provided. It is provided on the same base. Then, the heat-softened thermoplastic sheet is clamped by an elastic member and thermoformed. After the thermoforming, the base is further brought close to the female mold for forming and the plastic member is deformed plastically so as to crush the elastic member. A molded product closely trimmed in the female mold for molding is trimmed by a mold blade.
Japanese Patent No. 3,193,893 Japanese Patent No. 2849352 Japanese Utility Model Publication No. 05-078530

The conventional molding trimming device described above has the following problems.
In the former trimming apparatus, there is a problem that the trimming position varies. Further, since trimming is performed by pressing the Thomson blade against a resin receiving plate, shavings from the receiving plate may be mixed into the molded product. In addition, it is troublesome to perform the uneven adjustment work for finely adjusting the height of the blade when replacing the Thomson blade.
In the latter molding trimming device, although the trimming position hardly varies, the molded product is formed by clamping the outside of the portion to be trimmed, resulting in uneven thickness of the same molded product. was there. Further, the structure of the receiving portion of the male blade is complicated. If a receiving plate made of resin is used to simplify the structure of the receiving portion, another problem that shavings from the receiving plate enter the molded product will occur. Further, it is necessary to perform a fine adjustment of the height of the blade when the male blade is replaced, and a troublesome work to remove the unevenness.
The present invention has been made in view of the above problems, and provides a molding trimming device, a molding trimming mold, and a molding trimming method capable of improving the production efficiency when continuously producing high quality molded products. For the purpose of providing.

  In order to achieve the above object, the invention according to claim 1 is a molding die having a molding surface of a predetermined shape, and is capable of pressing and moving toward the molding die in opposition to the molding surface of the molding die. A sheet holding mechanism having a holding member and pressing and holding the heat-softened thermoplastic sheet disposed near the molding surface by the same holding member around the molding surface in the molding die; A molding mechanism for forming the molded article by bringing the thermoplastic sheet into close contact with the molding surface of the molding die by differential pressure molding; and a cutting mechanism arranged around the holding member and capable of pressing and moving toward the molding die. A trimming mechanism that has a blade and presses and cuts the periphery of the molded product pressed and held by the holding member with the cutting blade;

That is, the heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die is held by the sheet holding mechanism so as to be able to move toward the molding die in opposition to the molding surface of the molding die. At the periphery of the molding surface of the molding die. Then, the thermoplastic sheet held by the holding member comes into close contact with the molding surface of the molding die by differential pressure molding by the molding mechanism, and a molded product is formed. Then, the periphery of the molded product pressed and held by the holding member is cut by being pressed by a cutting blade which is arranged around the holding member and can be moved toward the molding die by the trimming mechanism.
As described above, the molded article is held and trimmed by the holding member in a state in which the molded article is in close contact with the molding surface of the molding die, so that the trimming position does not shift. In addition, since the molded product is molded while holding the inside of the trimmed portion, the thickness unevenness is reduced. Therefore, there is no need to remove a molded product having a large displacement in trimming or a molded product having a large thickness unevenness, and the production efficiency when continuously producing a high-quality molded product is improved. Furthermore, since the molded product is trimmed around the holding member, shavings are not mixed even when the receiving plate is used, and the receiving portion of the cutting blade can have a simple structure.
The differential pressure molding may be vacuum pressure molding, vacuum molding, or pressure molding.
Further, the molding die may be a molding female die that can be brought into close contact with the inner surface by drawing the thermoplastic sheet into the opening, or a molding male die having a convex molding surface.

  Here, as an example of the configuration of the sheet holding mechanism, the invention according to claim 2 is characterized in that the molding die is a female mold for molding that can be formed by drawing the heat-softened thermoplastic sheet into the inside. The holding mechanism is configured to include a plug fixed to the holding member and capable of moving back and forth into the female mold for molding. That is, the heat-softened thermoplastic sheet disposed near the molding surface of the female mold for molding is pushed into the female mold for molding when the plug fixed to the holding member enters the female mold for molding. .

  The invention according to claim 3 is characterized in that the sheet holding mechanism has a cylinder that moves the holding member in the direction of the molding die by supplying air pressure, and supplies the air pressure to the cylinder to hold the holding member. Thus, the heat-softened thermoplastic sheet disposed near the molding surface of the molding die is held. That is, the holding member is moved in the direction of the molding die by the cylinder supplied with air pressure, and retains the heat-softened thermoplastic sheet disposed near the molding surface of the molding die.

Further, in the invention according to claim 4, the cutting blade and the cylinder are provided on a table which can approach and separate from a molding surface of the molding die, and the sheet holding mechanism supplies air pressure to the cylinder. The holding member is moved in the direction of the molding die, and the table is brought close to the molding surface of the molding die, and the heated and softened thermoplastic sheet disposed near the molding surface is pressed by the holding member. The trimming mechanism stops the supply of the air pressure to the cylinder and further moves the table closer to the molding surface of the molding die, thereby forming a periphery of the molded product pressed and held by the holding member. It is configured to cut by pressing with the same cutting blade.
That is, the holding member is moved in the direction of the molding die by the cylinder supplied with air pressure, and the table is brought close to the molding surface of the molding die, so that the heat-softened thermoplastic sheet is disposed near the molding surface. Press and hold. Further, when the supply of air pressure to the cylinder is stopped and the table further approaches the molding surface of the molding die, the molded product pressed and held by the holding member is pressed by the cutting blade arranged around the holding member. Is cut off.

  By the way, if the cutting blade that presses and cuts the thermoplastic sheet can be reliably stopped at a predetermined position, it is suitable for continuously forming a molded product. Therefore, the invention according to claim 5 has first and second tables that can approach and separate from each other, and a molding surface of a predetermined shape opposed to the first table, and is provided on the second table. Molding mold, and a molding mechanism for forming a molded article by closely contacting the heat-softened thermoplastic sheet disposed near the molding surface of the molding die with the molding surface of the molding die by differential pressure molding, Having a cutting blade provided on any or a combination of the first and second tables, the first and second tables are brought close to each other, and the periphery of the molded article closely contacting the molding surface of the molding die A trimming mechanism that presses and cuts by the cutting blade, and is provided on any or a combination of the first and second tables, and sandwiches the molding die when the first and second tables approach each other. Multiple positions Contact with it is constituted comprising a stopper member for stopping the pressing motion of the cutting edge at a predetermined position.

That is, the heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die is brought into close contact with the molding surface of the molding die by differential pressure molding by the molding mechanism to form a molded product. The periphery of the molded product that is in close contact with the molding surface of the molding die is either trimmed by the trimming mechanism so that the first and second tables (first and second tables) come close to each other. Alternatively, it is cut by being pressed by a cutting blade provided in the combination. When the first and second tables are close to each other, the stopper member provided on any or a combination of the first and second tables abuts at a plurality of positions sandwiching the molding die, and the pressing movement of the cutting blade is reduced. Stop at a predetermined position.
Even with such a configuration, the molded product is trimmed in a state in which it is in close contact with the molding surface of the molding die, so that there is no displacement of the trimming. In addition, since the stopper member abuts at multiple positions sandwiching the molding die, the stop position of the cutting blade is securely fixed, making it difficult for the blade to spill, and finely adjusting the height of the blade when replacing the cutting blade The frequency of the operation can be reduced, and even if the receiving plate is made of a resin plate, no shavings are generated from the receiving plate.
Note that the table may be one in which both the first and second tables move, or one in which only one moves.

Here, as an example of the configuration of the stopper member, in the invention according to claim 6, the stopper member includes a plurality of first columnar members projecting from the first table toward the second table. A plurality of second columnar members projecting from the second table toward the first table in accordance with the positions of the plurality of first columnar members, and the first and second columnar members are , At the end opposite to the table.
That is, when the first and second tables approach, the plurality of first and second columnar members abut at a plurality of positions sandwiching the molding die, and the pressing movement of the cutting blade stops at the predetermined position.
Of course, the stopper member can have various shapes, and for example, may have a plate shape. Further, the stopper member may be a single member, for example, a single wall-shaped member formed so as to abut at a plurality of positions sandwiching the molding die.

  Further, in the invention according to claim 7, a plurality of tapes which can be detached one by one are laminated on one end or the combination of the first and second columnar members at an end opposite to the table. It is configured to be affixed. That is, by removing the tape laminated and affixed to the end of the first and second columnar members opposite to the table, the position where the first and second columnar members contact each other is gradually changed. Can be.

Further, the invention according to claim 8 is configured such that a length variable mechanism capable of finely adjusting the length of one or a combination of the first and second columnar members protruding from the table is provided. That is, by slightly adjusting the length of the first or second columnar member or the combination of the first and second columnar members protruding from the table by the variable length mechanism, the position where the first and second columnar members contact each other is slightly reduced. Can be changed at a time. The length adjusting mechanism can have various configurations, for example, a configuration in which a shim plate is inserted.
In addition, the variable length mechanism may be configured to be able to change the length protruding from the table by finely moving any or a combination of the first and second columnar members. Then, by slightly moving any or a combination of the first and second columnar members and changing the length protruding from the table, the position where the first and second columnar members contact each other can be changed little by little. it can. In this case, the length adjusting mechanism can be configured to combine, for example, an electric motor and a gear, or to use a taper wedge.

  By the way, if the pressing position of the cutting blade that presses and cuts the thermoplastic sheet can be determined, it is suitable for continuously forming a molded product. Therefore, the invention according to claim 9 has first and second tables that can approach and separate from each other, and a molding surface of a predetermined shape opposed to the first table, and is provided on the second table. Molding mold, and a molding mechanism for forming a molded article by closely contacting the heat-softened thermoplastic sheet disposed near the molding surface of the molding die with the molding surface of the molding die by differential pressure molding, Having a cutting blade provided on any or a combination of the first and second tables, the first and second tables are brought close to each other, and the periphery of the molded article closely contacting the molding surface of the molding die A trimming mechanism that presses and cuts by the cutting blade; and a trimming mechanism that is provided on the first and second tables and is disposed at a plurality of positions sandwiching the molding die when the first and second tables are close to each other. Mating to above molding surface It is constituted comprising a first and second guide members for positioning the pressing position of the cutting edge to the thermoplastic sheet located in the vicinity.

That is, the heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die is brought into close contact with the molding surface of the molding die by differential pressure molding by the molding mechanism to form a molded product. The periphery of the molded product that is in close contact with the molding surface of the molding die is trimmed by the cutting blade provided on either or the combination of the first and second tables by the proximity of the first and second tables. Is pressed and cut. When the first and second tables are close to each other, the first and second guide members provided on the first and second tables are fitted to each other at a plurality of positions sandwiching the molding die, and the molding die is formed. The pressing position of the cutting blade against the thermoplastic sheet disposed in the vicinity of the molding surface is determined.
Even with such a configuration, the molded product is trimmed in a state in which it is in close contact with the molding surface of the molding die, so that there is no displacement of the trimming. In addition, since the first and second guide members are fitted at a plurality of positions sandwiching the molding die, the pressing position of the cutting blade is surely fixed, and the blade is hardly spilled. The frequency of the work of finely adjusting the height of the blade can be reduced.

Here, as an example of the configuration of the guide member, the invention according to claim 10, wherein the first guide member includes a plurality of third columnar members protruding from the first table toward the second table. And a plurality of fourth columnar members protruding from the second table toward the first table in accordance with the positions of the plurality of third columnar members. A protrusion is formed at an end of one of the columnar members opposite to the table, and the protrusion can be fitted to an end of the other columnar member opposite to the table. It has a configuration in which a concave portion is formed.
That is, when the first and second tables are close to each other, a plurality of third and fourth columnar members are formed at a plurality of positions on both sides of the molding die at the end opposite to the table at the protrusion and the recess. And the pressing position of the cutting blade against the thermoplastic sheet arranged near the molding surface of the molding die is determined.
Needless to say, the guide member can have various shapes like the stopper member, and for example, may have a plate shape. Further, the guide member may be a single member for each of the first and second tables, for example, a single wall-shaped member formed to fit at a plurality of positions sandwiching the molding die for each table. You can also.

  Note that a position variable mechanism capable of changing the pressing position of the cutting blade by finely moving the third and fourth columnar members may be provided. Then, the pressing position of the cutting blade can be easily changed little by little by slightly moving the third and fourth columnar members by the position changing mechanism to change the position protruding from the table.

  By the way, if there is a holding frame for holding the cutting blade, it is suitable for forming a molded product continuously. Therefore, the invention according to claim 11 provides a molding die having a molding surface of a predetermined shape and a heat-softened thermoplastic sheet disposed near the molding surface of the molding die by differential pressure molding. A molding mechanism for forming a molded product by being in close contact with the molding surface of the molding die; and forming an annular shape corresponding to the shape of the molding surface of the molding die and facing the periphery of the molded product closely contacting the molding surface of the molding die. A trimming mechanism that has a cutting blade that can be pressed and moved, and that presses and cuts the periphery of the molded product with the same cutting blade, and a metal holding frame that holds the outer surface of the annular cutting blade. There is as a configuration.

That is, the heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die is brought into close contact with the molding surface of the molding die by differential pressure molding by the molding mechanism to form a molded product. The periphery of the molded product that is in close contact with the molding surface of the molding die is formed into an annular shape by the trimming mechanism in accordance with the shape of the molding surface of the molding die, and around the molded product that is in close contact with the molding surface of the molding die. It is cut by being pressed by a cutting blade that can be pressed toward it. The outer peripheral surface of the annular cutting blade is held by a metal holding frame.
Even with such a configuration, the molded product is trimmed in a state in which it is in close contact with the molding surface of the molding die, so that there is no displacement of the trimming. In addition, since the outer surface of the cutting blade is held by the holding frame, the blade is less likely to be spilled, and the frequency of fine adjustment of the height of the blade when replacing the cutting blade can be reduced. The accuracy of the trimming position is improved. Further, since the holding frame is made of metal, the cooling efficiency is improved, and also in this respect, the accuracy of the trimming position with respect to the heat-softened thermoplastic sheet is improved.

  Here, as an example of the configuration of the holding frame, the invention according to claim 12 is configured such that the holding frame is made of iron, stainless steel, copper steel, brass, or aluminum. That is, the outer surface of the cutting blade is held by a holding frame made of iron, stainless steel, copper steel, brass, or aluminum.

  In addition, as an example of the configuration of the cutting blade in the molding trimming device according to any one of claims 5 to 12, the invention according to claim 13 is configured such that the cutting blade is positioned relative to a molding surface of the molding die. And is configured to be able to be pressed toward the periphery of the molding surface. In other words, the periphery of the molded product that is in close contact with the molding surface of the molding die is cut by being pressed by a cutting blade that can move toward the periphery of the molding surface in opposition to the molding surface of the molding die. .

  By the way, if there is a receiving plate facing the cutting blade, it is suitable for forming a molded product continuously. Therefore, the invention according to claim 14 contacts a molding die having a molding surface of a predetermined shape and a heat-softened thermoplastic sheet disposed near the molding surface around the molding surface of the molding die. The metal receiving plate attached to the surface and the heat-softened thermoplastic sheet placed near the molding surface of the molding die are brought into close contact with the molding surface of the molding die by differential pressure molding to form a molded product. A forming mechanism to be formed, and a cutting blade capable of pressing and moving toward the receiving plate, and pressing the cutting blade toward the receiving plate to surround a molded product closely contacting a forming surface of the forming die. And a trimming mechanism for cutting.

That is, the heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die is brought into close contact with the molding surface of the molding die by differential pressure molding by the molding mechanism to form a molded product. A metal receiving plate is attached around a molding surface of the molding die on a surface that comes into contact with the heat-softened thermoplastic sheet disposed near the molding surface. The periphery of the molded product that is in close contact with the molding surface of the molding die is cut by being pressed by a cutting blade that can be pressed toward the receiving plate by the trimming mechanism.
Even with such a configuration, the molded product is trimmed in a state in which it is in close contact with the molding surface of the molding die, so that there is no displacement of the trimming. Further, since the receiving plate is made of metal, no shavings are generated from the receiving plate, and no shavings are mixed in the molded product.

  Here, as an example of the configuration of the receiving plate, the invention according to claim 15 is configured such that the receiving plate is made of iron, stainless steel, copper steel, brass, or aluminum. That is, the cutting blade is pressed toward a receiving plate made of iron, stainless steel, copper steel, brass or aluminum, and cuts around the molded product.

  In addition, as an example of the configuration of the cutting blade in the molding trimming device according to any one of claims 1 to 15, the invention according to claim 16 is configured such that the cutting blade is a Thomson blade. That is, the periphery of the molded product that is in close contact with the molding surface of the molding die is pressed and cut by a Thomson blade that can be formed into various shapes.

Further, as an example of the configuration of the molding die in the molding trimming device according to any one of claims 1 to 16, the invention according to claim 17 is characterized in that the molding die includes a plurality of female dies. And a common housing to which a plurality of female dies are attached. That is, when manufacturing a mold corresponding to a new molded product, it is only necessary to replace a plurality of female dies without replacing the housing.
The receiving plate facing the cutting blade may be attached to the housing. Then, it is not necessary to replace the receiving plate when producing a mold corresponding to a new molded product. Further, a cooling mechanism may be provided in the housing. Then, since there is no need to provide a cooling mechanism for a plurality of female dies, the cost for exchanging the dies can be further reduced.

By the way, as an example of the molding trimming device having the various configurations described above, as in the invention according to claim 18, the first and second tables, a molding die, a metal receiving plate, and a holding member are provided. It may be configured to include a sheet holding mechanism, a forming mechanism, a trimming mechanism having a cutting blade, a metal holding frame, a stopper member, and first and second guide members.
Further, an operation of heating and softening the thermoplastic sheet, transferring the heated and softened thermoplastic sheet, disposing the thermoplastic sheet near the molding surface of the molding die, and removing the molded product whose periphery has been cut out from the molding die is also performed. Alternatively, as in the invention according to claim 19, a configuration may be provided that includes a heating / softening mechanism, a transfer mechanism, and a molded product removal mechanism.

Further, as in the inventions according to claims 20 to 24, the present invention is also applicable to a molding trimming mold capable of performing trimming by performing differential pressure molding.
Further, the method of performing the trimming by performing the differential pressure molding is not necessarily limited to a substantial device or mold, and it can be easily understood that the method also functions as the method. Therefore, like the invention according to claims 25 to 29, the present invention can be applied also as a molding trimming method.
Needless to say, the configuration of the apparatus described in claims 2 to 4, claim 6 to claim 8, claim 10, claim 12, claim 13, and claim 15 to 19 correspond to the above-described mold and method. Needless to say, this is also possible.

As described above, according to the first, twentieth and twenty-fifth aspects of the present invention, the trimming position is eliminated, the thickness of the molded product is reduced in unevenness, and a high-quality molded product is continuously formed. It is possible to improve the production efficiency in the production. Further, since shavings are not mixed even when the receiving plate is used, the receiving portion of the cutting blade can have a simple structure.
According to the second aspect of the present invention, since the heat-softened thermoplastic sheet disposed near the molding surface of the female mold for molding is pressed into the female mold for molding, it is possible to mold a deeper molded product. Becomes possible.
Further, according to the third aspect of the present invention, it is possible to provide a specific example in which the heat-softened thermoplastic sheet is held around the molding surface of the molding die.
Further, according to the invention of claim 4, it is possible to provide a specific example in which the thermoplastic sheet is reliably formed and trimmed.

Further, according to the invention according to claim 5, claim 21, or claim 26, the work of finely adjusting the height of the blade to be performed when the cutting blade is replaced because the misalignment of the trimming is eliminated, the blade is hardly spilled and the blade is hardly spilled. Can be reduced and shavings are not generated from the receiving plate, so that it is possible to improve the production efficiency when continuously producing high quality molded products.
Further, according to the invention according to claim 6, the pressing movement of the cutting blade can be stopped at a predetermined position with a simple configuration.
Furthermore, according to the invention according to claim 7 and claim 8, even if the parallelism of the main molding trimming device is shifted according to the installation environment, the position where the first and second columnar members come into contact with each other can be easily reduced. Since it can be changed step by step, it is possible to easily restore the parallelism.

Furthermore, according to the ninth, twenty-second, and twenty-seventh aspects of the present invention, there is no displacement of the trimming, the life of the cutting edge is prolonged, and the height of the blade to be replaced when the cutting edge is replaced is finely adjusted. Since it is possible to reduce the frequency of the operations to be performed, it is possible to improve the production efficiency when continuously producing high quality molded products.
Further, according to the tenth aspect, the pressing position of the cutting blade can be determined with a simple configuration.

Further, according to the eleventh, twenty-third and twenty-eighth aspects of the present invention, there is no displacement of the trimming, the life of the cutting blade is extended, and the height of the blade to be replaced when the cutting blade is replaced is finely adjusted. This can reduce the frequency of the work to be performed and improve the accuracy of the trimming position, so that it is possible to improve the production efficiency when continuously producing high quality molded products.
Further, according to the twelfth aspect of the present invention, the holding frame can be formed by using a general-purpose material, and the cost can be reduced.
Further, according to the invention of claim 13, a configuration example of the cutting blade can be provided.

Furthermore, according to the inventions according to the fourteenth, twenty-fourth, twenty-fourth and twenty-ninth aspects, there is no displacement of trimming and no shavings are generated from the receiving plate, so that high quality molded products are continuously manufactured. In this case, it is possible to improve the production efficiency.
Further, according to the invention of claim 15, the receiving plate can be formed by using a general-purpose material, so that the cost can be reduced and the periphery of the molded product can be reliably cut. .
Further, according to the invention of claim 16, it is possible to trim the periphery of the molded product in various shapes using a general-purpose cutting blade.
Further, according to the seventeenth aspect, it is only necessary to exchange a plurality of female dies when manufacturing a die corresponding to a new molded product, so that cost can be reduced.

Further, according to the eighteenth aspect of the invention, it is possible to provide a specific example of a molding trimming apparatus capable of improving the production efficiency when continuously producing high quality molded products.
Further, according to the nineteenth aspect, it is possible to provide a specific example of a molding trimming apparatus capable of continuously manufacturing high quality molded products.

Hereinafter, embodiments of the present invention will be described in the following order.
(1) Explanation of the molding trimming device:
(2) Operation of the molding trimming device:
(3) Modification:

(1) Explanation of the molding trimming device:
FIG. 1 is a perspective view schematically showing a molding trimming apparatus according to an embodiment of the present invention.
In the figure, a forming and trimming apparatus 100 generally includes a roll sheet unwinding machine 11 for unwinding a roll-shaped thermoplastic sheet S1, a heater 20 for heating and softening the unwinded thermoplastic sheet S1, A transfer machine 13 for transferring the plastic sheet S1, a molding trimming machine 30 for forming and trimming a molded product of a container by differential pressure molding, and a scrap winding machine 12 for winding a scrap of the thermoplastic sheet S1 are trimmed. And a container unloader 60 for unloading the container. And the process which manufactures a container is performed continuously.
The present invention is applicable to an apparatus for manufacturing a trimmed molded product from a thermoplastic sheet, so the molded product is not limited to a container.

In the above configuration, the roll sheet unwinder 11 is provided with a roll-shaped thermoplastic sheet S1. The required amount of the thermoplastic sheet S <b> 1 is sequentially unwound from the roll sheet unwinder 11 while being sandwiched between the rollers of the transfer device 13. The unwound thermoplastic sheet S1 is transferred to the heater 20 by the transfer device 13, and is radiated by the heater 21 installed on the upper surface of the heater 20 to be softened by heating. That is, the heater 20 constitutes the heating softening mechanism according to the present invention.
The heat-softened thermoplastic sheet S1 is further transferred to the forming trimming machine 30 by the transfer device 13, and is arranged in the opening of the forming female mold. The forming and trimming apparatus 100 also includes a clamp machine (not shown) for clamping the side edge portion of the heat-softened thermoplastic sheet S1 and assisting the transfer. Is composed.

FIG. 2 is a perspective view showing the appearance of the molding trimming machine 30, and FIG. 3 is a sectional view taken along line AA of FIG. Some members such as a clamper for clamping a side edge portion of the thermoplastic sheet S1 are not shown.
As shown in the drawing, an upper table (first table) 31 and a lower table (second table) 32 that can approach and separate from each other between a predetermined separation position and a close position are provided in the molding trimming machine 30. And various members are attached based on the tables 31 and 32. The tables 31 and 32 are fixed to a driving device (not shown) that drives by, for example, hydraulic pressure. The upper table 31 can be driven up and down, and the lower table 32 can be driven up and down.

The lower table 32 is provided with a predetermined female mold (mold) 41 having an opening 42a facing the lower surface of the upper table 31. The molding female die 41 is provided at a substantially intermediate portion of the lower table 32 in FIG. The female mold 41 for main molding can mold 2 × 2 = 4 containers at a time. Of course, the number of containers that can be molded at once can be varied.
The female mold for molding 41 includes a plurality of female dies (four) 42 and a common housing 43 to which the four female dies 42 are attached. The housing 43 is made of aluminum and has a cooling passage (not shown) for preventing a rise in temperature due to heat given from the heat-softened thermoplastic sheet S1. The cooling passage is connected to a cooling liquid circulation mechanism (not shown), and a cooling liquid such as cooling water passes through the inside of the cooling passage. As shown in the exploded perspective view of FIG. 4, the housing 43 has four accommodation holes 43b vertically penetrating therein for accommodating the female mold 42, and the outer shape is adjusted according to the shape of the accommodation hole. The four processed female molds 42 can be accommodated. Therefore, it is only necessary to exchange a plurality of female dies when producing a mold corresponding to a new molded product according to the shape of the container, and since there is no need to provide a cooling mechanism for the multiple female dies, The cost for replacement is reduced.

  Each female mold 42 is made of metal and has an opening 42 a facing the lower surface of the upper table 31. Further, a suction hole 42c capable of sucking air downward from the bottom of the inner surface (molding surface) 42b having a predetermined shape is formed. The suction hole 42c is connected to a vacuum pump (not shown). When a closed space is formed in the female mold 42 and a vacuum pressure is applied to the suction hole 42c by the vacuum pump, the air in the closed space is sucked. Can be. Further, a through hole 42d for vertically penetrating a member constituting the knockout mechanism 51 for removing the formed and trimmed container is also formed.

Around the opening 42a of the female mold 41 for molding, a metal receiving plate 44 is attached to a surface in contact with the heat-softened thermoplastic sheet disposed in the opening 42a. The receiving plate 44 is located at a position facing an annular Thomson blade 48 described later, and is capable of cutting the heat-softened thermoplastic sheet S1 disposed on the upper surface by pressing the Thomson blade 48. The receiving plate 44 is made of stainless steel and can have various thicknesses. By providing a stopper member described later, even if the receiving plate 44 is made of stainless steel, the Thomson blade 48 does not spill.
The receiving plate can be made of various materials, and may be made of iron, copper steel, brass, aluminum, or the like. By using a general-purpose material such as stainless steel or iron for the receiving plate, the cost can be reduced.
As shown in FIG. 4, the receiving plate 44 has four openings 44 a formed in accordance with the shapes of the four receiving ports 43 b of the housing 43, and is attached to the upper surface of the housing 43. Therefore, there is no need to replace the receiving plate when manufacturing a mold corresponding to a new molded product, and the cost for replacing the mold can be reduced. In the present embodiment, one receiving plate is provided for four female dies, but a receiving plate may be separately provided for each of the female dies.

Four locators (holding members) 45 are attached to the lower side of the upper table 31 via cylinders 47. Each locator 45 is made of metal, and can be pressed toward the female mold 41 in opposition to each opening 42 a of the female mold 41. In the present embodiment, fine movement is possible within a range of about 1 to 5 mm. Note that the locator can be made of various materials, for example, a hard resin.
Then, each locator 45 presses the heated and softened thermoplastic sheet S1 disposed in the opening 42a near the inner side surface 42b around the opening 42a in the female mold 41 for molding so as to make close contact. It can be held.
On the lower surface of each locator 45, a plug 46 that can advance and retract into the female mold 41 is fixed. These plugs 46 are arranged above the opening 42a corresponding to the female opening 42a. The lower surface of the plug 46 when the upper and lower tables 31, 32 are at the separated position is higher than the upper surface of the female mold 41 for molding. Then, the thermoplastic sheet S <b> 1 disposed in the female opening 42 a is pushed into the female mold 41 when the plug 46 enters the female mold 41. Therefore, it is possible to perform so-called deep drawing forming for forming a deep molded product.

Each locator 45 is attached to a cylinder 47 that moves the locator 45 in the direction of the female mold 41 by supplying air pressure. Of course, various mechanisms for moving the locator are conceivable. For example, the locator may be moved by a hydraulic cylinder driven by applying high-pressure oil pressure. The upper table 31 is formed with a plurality of air supply holes 47a capable of supplying compressed air toward these cylinders 47. The air supply hole 47a is connected to an air pump (not shown). When high-pressure air is supplied to the air supply hole 47a by the air pump, the cylinder 47 can be pressed in the direction of the molding die 41. The cylinder 47 can be moved up and down only within a predetermined range by a mechanism not shown.
When the upper and lower tables 31 and 32 are at the close positions, the heat-softened thermoplastic sheet S1 arranged in the opening 42a of the female mold for molding is supplied to the cylinder 47 with air pressure supplied thereto. Locator 45 can be pressed and held around 42a. That is, the locator 45, the plug 46, the cylinder 47, and the air pump (not shown) constitute a seat holding mechanism according to the present invention.

The combination of each locator 45 and cylinder 47 is formed with an air passage 45a that communicates the inside. The air passage 45a is connected to an air pump (not shown) via the upper table 31. When high-pressure air is supplied to the air passage 45a by the air pump when the upper and lower tables 31, 32 are in the close position, the air passage 45a is formed. Compressed air can be introduced into the female mold 41.
Then, the thermoplastic table S1 is held by the locator 45 with the upper and lower tables 31 and 32 positioned close to each other while supplying compressed air to the cylinder 47, and vacuum pressure is applied to the suction holes 42c and compressed air is supplied from the air passage 45a. The container can be formed in close contact with the inner side surface 42b of the female mold for molding by pressurized air vacuum molding as differential pressure molding. That is, the vacuum pump connected to the suction hole 42c and the air pump connected to the air passage 45a constitute a forming mechanism according to the present invention.

Around each locator 45, an annular Thomson blade (cutting blade) 48 that can be pressed toward the receiving plate 44 is disposed. As shown in the exploded perspective view of the main part of FIG. It is provided. When the locator 45 is at a predetermined lower position with respect to the upper table 31, the lower side of the Thomson blade 48 is higher than the lower surface of the locator 45, and when the locator 45 is at a predetermined upper position, The lower side of the blade 48 is lower than the lower surface of the locator 45. When the locator 45 moves from the lower position to the upper position with the upper table 31 as a reference, the Thomson blade 48 moves down together with the upper table 31 so that the periphery of the molded article pressed and held by the locator 45 is pressed and cut. It has become. As described above, since the Thomson blade presses and cuts the periphery of the molded product, the Thomson blade has features that the shavings due to trimming are small and the appearance of the cut surface is good.
Further, since the Thomson blade can be formed in various shapes, the periphery of the molded product can be trimmed in various shapes. At this time, the shape of the inner surface 49a of the holding frame 49 may be formed according to the shape of the outer surface of the Thomson blade.
Then, when the upper and lower tables 31 and 32 are brought closer to each other by the drive mechanism, the Thomson blade 48 is pressed toward the receiving plate 44 and cuts around the molded product pressed and held by the locator 45. That is, the drive mechanism for driving both tables 31 and 32 and the Thomson blade 48 constitute a trimming mechanism according to the present invention.
When the Thomson blade 48 is replaced due to wear or the like, it is necessary to uniformly press the thermoplastic sheet S1. Therefore, uneven work for finely adjusting the height of the blade is performed.

The holding frame 49 is made of iron, and is provided below the upper table 31. Of course, the holding frame can be made of various materials, and may be made of stainless steel, copper steel, brass, aluminum, or the like. By using a general-purpose material such as iron, stainless steel, or aluminum for the holding frame, the cost can be reduced.
As shown in FIG. 5, the holding frame 49 has bolt through holes 49b formed at four corners. The bolt through holes 49b are aligned with the positions of the bolt holes 31a provided on the lower surface of the upper table 31, and bolts (not shown) are used. It is designed to be bolted. Then, the Thomson blade 48 is held on the inner side surface 49 a and the holding frame 49 is bolted, so that the Thomson blade 48 is attached to the lower surface of the upper table 31. As described above, since the outer surface of the Thomson blade is held by the holding frame, the Thomson blade is less likely to be spilled, and the frequency of uneven work during replacement can be reduced. Also, the accuracy of the trimming position is good.

When trimming is performed on the heat-softened thermoplastic sheet S1, heat is transmitted to the Thomson blade 48. When the Thomson blade 48 is held by a plywood as in the related art, heat is accumulated in the Thomson blade 48, and the Thomson blade 48 may be deformed around the joint 48b. By making the holding frame made of metal, the cooling efficiency is improved, and the deformation of the Thomson blade 48 is prevented. In this regard, the precision of the trimming position can be improved.
The upper table 31 is provided with a cooling passage through which a cooling liquid such as cooling water passes, so that heat transmitted from the heat-softened thermoplastic sheet S1 to the metal holding frame can be easily absorbed. .

A plurality of first columnar members 33 projecting toward the lower table 32 are attached to the lower side of the upper table 31. On the upper side of the lower table 32, a plurality of second columnar members 34 projecting toward the upper table 31 in accordance with the positions of the first columnar members 33 are attached. These columnar members 33 and 34 are made of stainless steel. When the upper and lower tables 31 and 32 approach each other, an end 33a of the first columnar member 33 on the opposite side to the upper table 31 and an end 34a of the second columnar member 34 on the opposite side to the lower table 32 are formed. All come into contact almost simultaneously. At this time, the blade edge of the Thomson blade 48 is adjusted so as to contact the upper surface of the receiving plate 44.
Here, since the columnar members 33 and 34 are provided at the four corners of both the tables 31 and 32, the columnar members 33 and 34 on the diagonal line are positioned to sandwich the female mold 41 for molding. In other words, the columnar members 33 and 34 are a stopper member that abuts at a plurality of positions sandwiching the molding die 41 and reliably stops the pressing movement of the Thomson blade 48 at a predetermined position. By providing the stopper member, the pressing movement of the Thomson blade is stopped at a predetermined position without fail, so that the Thomson blade is less likely to spill and the frequency of uneven work during replacement is reduced, and the receiving plate is replaced with a resin plate. Even if it does, shavings will not be generated from the receiving plate.
Note that the stopper member may be provided only on the upper table, or may be provided only on the lower table, as long as the stopper member abuts and stops the pressing movement of the Thomson blade at a predetermined position. However, the same effect can be obtained. Further, the stopper members abutting at a plurality of positions sandwiching the molding die may be formed of the same member.

A plurality of detachable tapes are laminated and attached to end portions 33a, 34a of the columnar members 33, 34 on the opposite side to the tables 31, 32, respectively. As the tape, a stainless tape or the like can be adopted. Even if the parallelism of the apparatus 100 is shifted according to the installation environment, the position where the columnar members 33 and 34 come into contact can be easily changed little by little by removing the attached tapes one by one. The parallelism can be easily restored.
Needless to say, the tape may be applied only to the first columnar member 33 or the tape may be applied only to the second columnar member 34, and the same effect can be obtained in these cases.

As described above, the stop position of the Thomson blade is reliably fixed by providing the stopper member, so that it is not necessary to provide a resin plate such as PP as a receiving plate as in the related art. As a result, the problem of mixing of shavings caused by pressing the Thomson blade against the resin receiving plate can be solved.
Even if the Thomson blade is provided on the lower table, the stop position of the Thomson blade can be reliably fixed by providing the above-described stopper member. And the problem of shavings is eliminated.

Below the upper table 31, a plurality of third columnar members 35 (35A, 35B) protruding toward the lower table 32 are attached. On the upper side of the lower table 32, a plurality of fourth columnar members 36 (36A, 36B) projecting toward the upper table 31 in accordance with the positions of the third columnar members 35 are attached. These columnar members 35 and 36 are also made of stainless steel. A projection 36a is formed at an end of the fourth columnar member 36 opposite to the lower table 32. In addition, a concave portion 35a shaped to be fittable with the convex portion 36a is formed at an end of the third columnar member 35 opposite to the upper table 31. Then, when the upper and lower tables 31, 32 approach each other, the projections 36a and the recesses 35a are all fitted substantially simultaneously. Here, the columnar members 35A and 36A and the columnar members 35B and 36B are positioned to sandwich the female mold 41 for molding. That is, the columnar members 35 and 36 are fitted in a plurality of positions sandwiching the molding die 41 with a simple configuration to position the pressing position of the cutting blade against the thermoplastic sheet disposed in the opening 42a. It becomes the first and second guide members. The provision of the guide member ensures that the pressing position of the Thomson blade is constant, so that the Thomson blade is less likely to be spilled and the frequency of uneven work during replacement is reduced.
The guide members abutting at a plurality of positions sandwiching the molding die may be formed of the same member. Further, a convex portion may be formed on the third columnar member 35 and a concave portion may be formed on the fourth columnar member 36.
Furthermore, even if the Thomson blade is provided on the lower table, the provision of the above-mentioned guide member ensures that the pressing position of the Thomson blade is fixed, so that the Thomson blade is unlikely to be spilled out and needs to be replaced. This has the effect of reducing the frequency of uneven work.

By the way, the container formed by the molding trimming machine 30 and the periphery thereof is cut is taken out from the inside of the female mold 41 by the container take-out machine 60. FIG. 6 shows an outline of the container unloader 60. In addition, the container V1 and the like are shown in a sectional view. The container unloader 60 is provided with four suction units 62, the same as the number of containers formed at one time. Has become. A vacuum pump 63 is provided in the main body 61, and the suction unit 62 is connected to the vacuum pump 63. The main body 61 is also provided with a mechanism capable of reciprocatingly driving the suction unit 62 within a predetermined range in the horizontal direction and within a predetermined range in the vertical direction. Then, the suction unit 62 is arranged on the container V1, the container V1 is raised by the knockout mechanism 51, the suction unit 62 is lowered, and a vacuum pressure is applied to the suction unit 62. When the container V1 is carried in, the container V1 can be taken out from the female mold 41 for molding. The knockout mechanism 51 is configured by, for example, vertically moving an abutting member abutting on the lower side of the bottom surface of the container V1 by an air cylinder driven by air pressure.
That is, the container removing machine 60 and the knockout mechanism 51 constitute a molded product removing mechanism according to the present invention.

On the other hand, the scrap sheet of the thermoplastic sheet S1 after trimming is wound up and collected while being pulled by the scrap winding machine 12.
The thermoplastic sheet that can be subjected to differential pressure molding by the molding trimming device 100 having the above configuration may be a sheet made of a thermoplastic material. As the material, for example, various materials such as polyethylene resin, polypropylene resin, polystyrene resin, polyvinyl chloride resin, ABS resin, polyethylene terephthalate resin, and polycarbonate resin can be used. In particular, polypropylene resin is heat resistant at the time of use, has good moldability, and is a suitable resin at a relatively low price. Also, various thicknesses of the sheet can be adopted.

(2) Operation of the molding trimming device:
Next, the operation of the molding trimming machine 30 according to the present embodiment having the above configuration will be described with reference to the timing chart of FIG. It is assumed that the thermoplastic sheet S1 has been softened by heating with the heater 20, and the upper and lower tables 31, 32 are at predetermined separation positions. Further, it is assumed that no vacuum pressure is applied to the female suction hole 42c, and no compressed air is supplied from the air passage 45a passing through the locator 45.
In this state, the heated and softened thermoplastic sheet S1 is transferred to the molding trimming machine 30 by the transfer machine 13 (timing T1 to T2). In the present embodiment, the air pressure is supplied to the cylinder 47 by the air pump at the timing T1, and the locator 45 is moved in the direction of the molding die 41 and lowered to a predetermined lowering position. Then, as shown in FIG. 3, the heat-softened thermoplastic sheet S1 is arranged in the opening 42a near the inner side surface 42b of the female mold 42 for molding.
The locator 45 may be lowered before the timing T1, or may be lowered after the timing T1 or T2.

  After the heated and softened thermoplastic sheet S1 is transferred, the lower table 32 is raised by the table driving mechanism, and the upper table 31 is lowered to approach the opening 42a of the female mold for molding (timing T3 to T4). ). Then, as shown in the cross-sectional view of FIG. 8, the descending plug 46 enters the forming female mold 41, and the thermoplastic sheet S <b> 1 disposed in the female opening 42 a is moved into the forming female mold 41. Press Further, the locator 45 contacts the upper surface of the thermoplastic sheet S1, and presses and holds the thermoplastic sheet S1 around the female opening 42a. At this time, the driving force for bringing the upper and lower tables 31 and 32 close to each other remains, but the locator 45 abuts on the thermoplastic sheet S1 on the upper surface of the molding die 41, and the two tables 31 and 32 are no longer close to each other. . Since the cutting edge of the Thomson blade 48 is above the lower surface of the locator 45, the thermoplastic sheet S1 is not cut.

In addition, the convex portions 36a of the two fourth columnar members 36 are inserted into and fitted into the concave portions 35a of the other third columnar members 35, respectively, with respect to the thermoplastic sheet S1 arranged in the female opening 42a. The pressing position of the Thomson blade is determined. Since the two sets of columnar members 35 and 36 are positioned so as to sandwich the female mold 41, the pressing position of the Thomson blade is reliably fixed, the blade is hardly spilled, the life of the Thomson blade is lengthened, and the time of replacement is reduced. The frequency of uneven work for finely adjusting the height of the blade to be performed can be reduced. Therefore, the production efficiency when continuously producing high quality molded products is improved.
Note that the four sets of columnar members 33 and 34 have not yet contacted.

Thereafter, air is sucked from the suction hole 42c by the vacuum pump to apply vacuum pressure to the inside of the female mold 41, and compressed air is supplied from the air passage 45a by the air pump (timing T5). Here, the thermoplastic sheet S1 held by the locator 45 is pushed downward by compressed air from above, and the air in the closed space formed by the inner side surface 42b of the female mold 42 and the thermoplastic sheet S1 is sucked. You. Then, as shown in the cross-sectional view of FIG. 9, the heat-softened thermoplastic sheet S1 is separated from the plug 46 and is brought into close contact with the inner surface 42b of the female mold 41 for molding by differential pressure molding to form a molded product of a container. You.
Since the female mold 41 is cooled by the cooling liquid flowing through the cooling passage of the housing 43, the temperature of the container closely contacting the inner side surface 42b is lowered and hardened.

When the container is formed, the supply of air pressure to the cylinder 47 is stopped. Then, the upper and lower tables 31 and 32 approach each other due to the remaining driving force and reach a predetermined proximity position, and the locator 45 relatively moves to a predetermined ascending position with respect to the upper table 31 as shown in the cross-sectional view of FIG. (Timing T6). That is, the upper table 31 further approaches the opening 42a of the female mold 41 for molding, and the periphery of the container closely contacting the inner surface 42b of the female mold 41 is pressed by the Thomson blade 48 while being held by the locator 45. Be cut off. At this time, the columnar members 33 and 34 come into contact with each other at four positions sandwiching the molding die 41, and the pressing movement of the Thomson blade 48 stops at a predetermined position where it comes into contact with the upper surface of the receiving plate 44.
As described above, since the columnar members 33 and 34 abut at a plurality of positions sandwiching the female mold for molding, the stopping position of the Thomson blade is reliably fixed, the blade is hardly spilled, and the height of the blade to be performed at the time of replacement is reduced. The frequency of the uneven work to be adjusted can be reduced. Even if the receiving plate is made of a resin plate, no shavings are generated from the receiving plate. Therefore, the production efficiency when continuously producing high quality molded products is improved.

  If the locator is not directly driven by a driving mechanism such as a cylinder and is directly mounted on the lower portion of the upper table, the locator must be made of an elastic member having high elasticity such as rubber. Then, it is necessary to perform control to stop the upper and lower tables very accurately in the middle, so that the structure of the molding trimming machine becomes complicated, and the locator is crushed when pressing and cutting the thermoplastic sheet with a Thomson blade. Due to the deformation, there may be a displacement of the trimming position. By providing the locator on the upper table via a drive mechanism such as a cylinder as in the present embodiment, the trimming position does not shift, and the precision of the trimming position can be kept good.

When the periphery of the container is cut by the Thomson blade 48, the suction of the air from the suction hole 42c ends, and the supply of the compressed air from the air passage 45a ends (timing T7). After that, the upper table 31 is raised and the lower table 32 is lowered, and the upper and lower tables 31, 32 are vertically separated to the separated position (timing T8 to T9). Then, as shown in the cross-sectional view of FIG. 11, the container V1 whose periphery has been cut is left in the female mold 41 for molding, and the scrap sheet of the thermoplastic sheet S1 after trimming is clamped on the side portions by a clamp machine. It is clamped and separates from the female mold 41 for molding.
As shown in FIG. 6, the container V <b> 1 left in the female mold for molding 41 is raised by the knockout mechanism 51, and is sucked and held by the suction part 62 of the container unloader 60, so that the inside of the female mold for molding 41 is removed. Taken out of After that, returning to the timing T1, the thermoplastic sheet S1 that has been heated and softened is transferred by the transfer device 13 to the molding trimming machine 30. At this time, the scrap sheet of the thermoplastic sheet S <b> 1 is also transferred by the transfer device 13 and wound up and collected while being pulled by the scrap take-up device 12.
As described above, the processing of forming and trimming the thermoplastic sheet S1 can be continuously performed by repeating the timings T1 to T9.

In this way, the container is held by the locator and trimmed in a state in which the container is in close contact with the female mold for molding, so that there is no displacement of the trimming. Further, since the container is formed while being held inside the portion to be trimmed, there is little unevenness in wall thickness. Therefore, there is no need to perform an operation of removing a container having a large displacement in trimming or a container having a large thickness unevenness, and it is possible to improve the production efficiency when continuously producing containers of good quality. Further, by using the receiving plate, the receiving portion of the Thomson blade has a simple structure.
In addition, since the outer surface of the Thomson blade is held by the holding frame, the life of the Thomson blade is lengthened, and the frequency of uneven work can be reduced. Since the holding frame is made of metal, the cooling efficiency is high, the deformation of the Thomson blade due to heat can be prevented, and the precision of the trimming position with respect to the heated and softened thermoplastic sheet can be improved. Even if the Thomson blade is provided on the lower table, by providing the above-mentioned metal holding frame, the deformation of the Thomson blade due to heat can be similarly prevented, and the position of trimming with respect to the heat-softened thermoplastic sheet can be prevented. The effect of improving the accuracy of is obtained.
Further, since the receiving plate is made of metal, shavings from the receiving plate do not occur, and the problem of shavings entering the container can be solved.

(3) Modification:
In the above-described embodiment, the thermoplastic sheet heated and softened by the automatic processing is transferred to the molding trimming machine. However, the thermoplastic sheet heated and softened may be manually supplied to the molding trimming machine to perform molding and trimming. . Further, the trimmed molded product may be manually taken out of the molding female mold. Even in these cases, the molded product is molded while holding the inside of the trimmed portion and trimmed in that state, so that there is no displacement in trimming and there is little unevenness in wall thickness. Accordingly, there is no need to perform an operation of removing a molded product having a large displacement in trimming or a molded product having a large uneven thickness, and the production efficiency when continuously producing molded products of good quality is improved.

  Further, in the above-described embodiment, the lower table is provided with the forming female mold and the upper table is provided with the locator and the Thomson blade, but the upper table is provided with the forming female mold and the lower table is provided with the locator and the Thomson blade. Is also good. Of course, in addition to the upper and lower tables that can be driven in a substantially vertical direction, the table may be a left and right table that can be driven in a substantially horizontal direction, or a table that can be driven in a direction deviated from the vertical or horizontal direction. There may be.

Further, when adjusting the position where the first and second columnar members abut, the abutting position may be adjusted using an electric motor without using a tape. One example is shown in FIG. The figure shows a main part of a molding trimming device according to a modification in a partially sectional view.
As shown in the drawing, a first columnar member (stopper member) 133 made of stainless steel and protruding toward the lower table 32 via a first mounting member 133c is attached to a lower side of the upper table 31. . Note that a total of four first columnar members 133 are provided at four corners of the upper table 31. On the upper side of the lower table 32, a stainless steel second columnar member (stopper) protruding toward the upper table 31 via the second mounting member 134c in accordance with the position of each first columnar member 133. ) 134 are attached. The columnar members 133 and 134 on the diagonal lines of both tables 31 and 32 are positioned to sandwich the female mold for molding. When the upper and lower tables 31 and 32 come close to each other, the ends of the first and second columnar members 133 and 134 on the side opposite to the tables 31 and 32 all abut substantially simultaneously.

  Male screws 133d and 134d are formed at ends of the first and second columnar members 133 and 134 on the table 31 and 32 sides, respectively. Female screws 133e, 134e are formed on the first and second mounting members 133c, 134c, respectively. The male screws 133d, 134d are screwed into the female screws 133e, 134e, so that the columnar members 133, 134 can be mounted on the table 31, 32 are attached to the attachment members 133c and 134c fixed to 32.

  Gears 133f and 134f are externally fitted to substantially vertical intermediate portions of the columnar members 133 and 134, respectively. On the other hand, the mounting members 133c and 134c are provided with driving gears 133g and 134g connected to the internal electric motor, respectively, and the driving gears 133g and 134g are meshed with the gears 133f and 134f. The electric motor is bidirectionally rotatable and connected to a power switch (not shown). When the power switch is turned on, the electric motor drives the driving gears 133g and 134g, and the columnar member gears 133f and 134f. To rotate. Then, although the columnar members 133 and 134 rotate, since the male screws 133d and 134d are screwed into the female screws 133e and 134e, the columnar members 133 and 134 are slightly moved upward or downward according to the rotation direction. That is, each of the parts 133c to 133g, 134c to 134g and the power switch (not shown) constitute a length variable mechanism capable of finely adjusting the length of the first and second columnar members protruding from the table.

  With the above configuration, even if the parallelism of the molding trimming device is shifted according to the installation environment, the position where the first and second columnar members come into contact can be easily changed little by little. It will be possible to recover. Also in this modification, the columnar member may be provided on only one of the upper and lower tables, as long as the columnar member comes into contact with it and stops the pressing movement of the Thomson blade at a predetermined position.

FIG. 13 is a sectional view showing a main part of a molding trimming apparatus according to another modification. It is assumed that a total of four first columnar members projecting toward the lower table 32 are provided at four corners of the upper table below the upper table.
On the upper side of the lower table 32, a stainless steel second columnar member 234 protruding toward the upper table 31 via a mounting member 234a is attached in accordance with the position of each first columnar member. Then, when the upper and lower tables are close to each other, the ends of the first and second columnar members on the opposite side to the table all abut substantially simultaneously.

The lower end of the columnar member 234 is tapered (upward to the right in the figure) and inserted into the mounting member 234a. A tapered wedge 234b whose upper surface is in a right-upward state in the drawing is inserted into the mounting member 234a, and is in contact with the lower end of the columnar member 234. Here, the tapered wedge 234b is moved little by little in the horizontal direction by the electric motor 234c, and slightly moves the contacted columnar member 234 in the vertical direction. Therefore, the position where the first and second columnar members contact each other can be easily finely adjusted, and the parallelism can be easily restored.
Of course, the length of the first and second columnar members may be finely adjusted by inserting the shim plate without using the electric motor.

  As described above, according to the present invention, it is possible to provide a molding trimming device capable of improving production efficiency when continuously producing high-quality molded products in various aspects. Of course, the present invention is also effective as a molding trimming die capable of performing trimming by performing differential pressure molding as described above, and as a molding trimming method of performing trimming by performing such differential pressure molding. Is also effective.

It is a perspective view showing the outline of the molding trimming device concerning one embodiment of the present invention. It is a perspective view showing the appearance of a molding trimming machine. It is sectional drawing which shows the AA cross section of FIG. It is a disassembled perspective view of a female mold for molding and a receiving plate. FIG. 4 is an exploded perspective view showing a main part on a lower side of the upper table in an exploded manner. It is a figure which shows the outline of a container removal machine. 6 is a timing chart showing the operation of the molding trimming machine. It is a figure which shows a mode when the locator holds the thermoplastic sheet in sectional view. It is a figure which shows a mode when the thermoplastic sheet is made to contact closely with the inner surface of a female type | mold by differential pressure molding in sectional view. It is a figure which shows the state when a Thomson blade press-cuts the circumference | surroundings of a molded product in sectional view. It is a figure which shows the mode when the upper and lower tables separate from each other in sectional view. It is a side view which shows the principal part of the shaping | molding trimming apparatus concerning a modification in partial cross section view. It is a figure which shows the principal part of the shaping | molding trimming apparatus concerning another modification in sectional view.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 11 ... Roll sheet unwinding machine 12 ... Scrap winding machine 13 ... Transfer machine 20 ... Heating machine 21 ... Heater 30 ... Molding trimming machine 31 ... Upper table 32 ... Lower tables 33 and 133 ... First columnar member (stopper member)
34, 134, 234: second columnar member (stopper member)
35 ... third columnar member (first guide member)
35a: recess 36: fourth columnar member (second guide member)
36a ... convex part 41 ... molding female mold 42 ... female mold 42a ... opening 42b ... inner side surface 42c ... suction hole 42d ... through hole 43 ... housing 43b ... accommodation port 44 ... metal receiving plate 44a ... opening 45 ... locator (Holding member)
45a ... air passage 46 ... plug 47 ... cylinder 47a ... air supply hole 48 ... Thomson blade (cutting blade)
48a ... outer side surface 49 ... metal holding frame 49a ... inner side surface 51 ... knockout mechanism 60 ... container removal machine 100 ... molding trimming devices 133c, 134c ... mounting members 133d, 134d ... male screws 133e, 134e ... female screws 133f, 134f, 133g 134g ... gear S1 ... thermoplastic sheet V1 ... container

Claims (29)

A molding die having a molding surface of a predetermined shape,
The molding die has a holding member that can be pressed toward the molding die in opposition to the molding surface, and a heat-softened thermoplastic sheet disposed in the vicinity of the molding surface in the molding die. A sheet holding mechanism that presses and holds the holding member around the molding surface,
A molding mechanism for forming a molded product by bringing the held thermoplastic sheet into close contact with the molding surface of the molding die by differential pressure molding,
Trimming that has a cutting blade disposed around the holding member and that can be pressed toward the molding die, and presses and cuts the periphery of the molded product pressed and held by the holding member with the cutting blade; A molding trimming device comprising a mechanism. The molding die is a female mold for molding that can be molded by drawing in the heat-softened thermoplastic sheet inside,
The molding trimming apparatus according to claim 1, wherein the sheet holding mechanism includes a plug fixed to the holding member and capable of moving back and forth into the female mold for molding.   The sheet holding mechanism has a cylinder that moves the holding member in the direction of the molding die by supplying air pressure, and supplies air pressure to the cylinder and the vicinity of a molding surface of the molding die by the holding member. The molding and trimming apparatus according to claim 1, wherein the thermoplastic sheet that has been heated and softened is held. The cutting blade and the cylinder are provided on a table that can approach and separate from the molding surface of the molding die,
The sheet holding mechanism is arranged near the molding surface by supplying air pressure to the cylinder to move the holding member in the direction of the molding die and bring the table close to the molding surface of the molding die. The heat-softened thermoplastic sheet is pressed and held by the holding member,
The trimming mechanism stops the supply of air pressure to the cylinder and further brings the table closer to the molding surface of the molding die, so that the periphery of the molded product pressed and held by the holding member is cut by the same cutting edge. The molding trimming device according to claim 3, wherein the cutting is performed by pressing. First and second tables that can approach and separate from each other;
Having a molding surface of a predetermined shape facing the first table, a molding die provided on the second table,
A molding mechanism for forming a molded product by bringing a heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die into close contact with the molding surface of the molding die by differential pressure molding,
Having a cutting blade provided on any or a combination of the first and second tables, the first and second tables are brought close to each other to form a periphery of a molded article closely contacting the molding surface of the molding die. A trimming mechanism that presses and cuts with the same cutting blade;
It is provided on any or a combination of the first and second tables, and when the first and second tables are close to each other, they come into contact with each other at a plurality of positions sandwiching the molding die and press the cutting blade. And a stopper member for stopping at a predetermined position.   The stopper member is a plurality of first columnar members projecting from the first table toward the second table, and the plurality of first columnar members are aligned with the plurality of first columnar members from the second table in accordance with the positions of the plurality of first columnar members. A plurality of second columnar members protruding toward the first table, wherein the first and second columnar members abut on each other at ends opposite to the table. The molding trimming device according to claim 5, wherein   In one or a combination of the first and second columnar members, the end opposite to the table is characterized in that a plurality of removable tapes are laminated and attached one by one. The molding trimming device according to claim 6.   8. A mechanism according to claim 6, further comprising a variable length mechanism capable of finely adjusting the length of one or a combination of the first and second columnar members protruding from the table. A molding trimming apparatus according to any one of the above. First and second tables that can approach and separate from each other;
Having a molding surface of a predetermined shape facing the first table, a molding die provided on the second table,
A molding mechanism for forming a molded product by bringing a heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die into close contact with the molding surface of the molding die by differential pressure molding,
Having a cutting blade provided on any or a combination of the first and second tables, the first and second tables are brought close to each other to form a periphery of a molded article closely contacting the molding surface of the molding die. A trimming mechanism that presses and cuts with the same cutting blade;
Along with being provided on the first and second tables, when the first and second tables are close to each other, they are fitted together at a plurality of positions sandwiching the molding die and arranged near the molding surface. A molding trimming device comprising: first and second guide members for positioning a pressing position of the cutting blade against a thermoplastic sheet.   The first guide member includes a plurality of third columnar members projecting from the first table toward the second table, and the second column in accordance with the positions of the plurality of third columnar members. A plurality of fourth columnar members protruding from the table toward the first table, and an end of one of the third and fourth columnar members on the opposite side to the table. 10. A molding according to claim 9, wherein a projection is formed on the other columnar member, and a recess is formed at an end of the other columnar member opposite to the table so as to be fitted with the projection. Trimming device. A molding die having a molding surface of a predetermined shape,
A molding mechanism for forming a molded product by bringing a heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die into close contact with the molding surface of the molding die by differential pressure molding,
A cutting edge which is formed in an annular shape corresponding to the shape of the molding surface of the molding die and has a cutting blade which can be pressed toward the periphery of the molding which is in close contact with the molding surface of the molding die; A trimming mechanism for cutting by pressing the same with the cutting blade,
A metal holding frame for holding an outer surface of the annular cutting blade;   The molding trimming device according to claim 11, wherein the holding frame is made of iron, stainless steel, copper steel, brass, or aluminum.   The cutting edge according to any one of claims 5 to 12, wherein the cutting blade is configured to be capable of pressing and moving toward the periphery of the molding surface in opposition to the molding surface of the molding die. Mold trimming device. A molding die having a molding surface of a predetermined shape,
A metal receiving plate attached to the surface in contact with the heat-softened thermoplastic sheet disposed near the molding surface around the molding surface of the molding die,
A molding mechanism for forming a molded product by bringing a heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die into close contact with the molding surface of the molding die by differential pressure molding,
A trimming mechanism that has a cutting blade that can be pressed toward the receiving plate, and presses the cutting blade toward the receiving plate to cut around a molded product that is in close contact with the molding surface of the molding die. A molding trimming device, comprising:   The molding trimming device according to claim 14, wherein the receiving plate is made of iron, stainless steel, copper steel, brass, or aluminum.   The molding trimming device according to claim 1, wherein the cutting blade is a Thomson blade.   17. The molding trimming device according to claim 1, wherein the molding die includes a plurality of female dies and a common housing to which the plurality of female dies are attached. First and second tables that can approach and separate from each other;
Having a molding surface of a predetermined shape facing the first table, a molding die provided on the second table,
A metal receiving plate attached to the surface in contact with the heat-softened thermoplastic sheet disposed near the molding surface around the molding surface of the molding die,
The molding die has a holding member that can be pressed toward the molding die in opposition to the molding surface, and a heat-softened thermoplastic sheet disposed in the vicinity of the molding surface in the molding die. A sheet holding mechanism that presses and holds the holding member around the molding surface,
A molding mechanism for forming a molded product by bringing the held thermoplastic sheet into close contact with the molding surface of the molding die by differential pressure molding,
An annular cutting blade is provided on the first table and is disposed around the holding member and can be pressed toward the receiving plate. A trimming mechanism for cutting the periphery of the molded product pressed and held by the holding member by pressing the blade toward the receiving plate,
A metal holding frame provided on the first table and holding an outer surface of the annular cutting blade,
It is provided on any one or a combination of the first and second tables, and when the first and second tables are close to each other, they come into contact with each other at a plurality of positions sandwiching the molding die and press the cutting blade. A stopper member for stopping at a predetermined position,
Along with being provided on the first and second tables, when the first and second tables are close to each other, they are fitted to each other at a plurality of positions sandwiching the molding die and arranged near the molding surface. A molding trimming device, comprising: first and second guide members for positioning a pressing position of the cutting blade against a thermoplastic sheet. A heating softening mechanism for heating and softening the thermoplastic sheet,
A transfer mechanism for transferring the heat-softened thermoplastic sheet and disposing it near the molding surface of the molding die,
The molding trimming apparatus according to any one of claims 1 to 18, further comprising a molded product removal mechanism for removing the molded product whose periphery has been cut from the molding die. A molding die that has a molding surface of a predetermined shape and is capable of forming a molded product by bringing a heat-softened thermoplastic sheet disposed in the vicinity of the molding surface into close contact with the molding surface by differential pressure molding;
The pressing surface can be moved toward the molding die in opposition to the molding surface of the molding die, and the heat-softened thermoplastic sheet disposed near the molding surface is formed on the molding surface of the molding die. A holding member that can be pressed and held around,
A cutting blade arranged around the holding member and capable of being pressed toward the molding die, and capable of cutting by pressing around the molded product pressed and held by the holding member. A molding trimming mold characterized by the following. The first table has a molding surface of a predetermined shape opposed to the first table, and is provided on the second table which can be approached and separated from the first table, and is heated and softened disposed near the molding surface. A molding die capable of forming a molded product by bringing a thermoplastic sheet into close contact with a molding surface by differential pressure molding,
A cutting blade that is provided on any or a combination of the first and second tables, and presses and cuts around a molded product that is in close contact with the molding surface of the molding die when the first and second tables are close to each other. When,
It is provided on any or a combination of the first and second tables, and when the first and second tables are close to each other, they come into contact with each other at a plurality of positions sandwiching the molding die and press the cutting blade. And a stopper member for stopping at a predetermined position. The first table has a molding surface of a predetermined shape opposed to the first table, and is provided on the second table which can be approached and separated from the first table, and is heated and softened disposed near the molding surface. A molding die capable of forming a molded product by bringing a thermoplastic sheet into close contact with a molding surface by differential pressure molding,
A cutting blade that is provided on any or a combination of the first and second tables, and presses and cuts around a molded product that is in close contact with the molding surface of the molding die when the first and second tables are close to each other. When,
Along with being provided on the first and second tables, the first and second tables were fitted near each other at a plurality of positions sandwiching the molding die when approaching the first and second tables, and were arranged near the molding surface. A molding trimming die, comprising: first and second guide members for positioning a pressing position of the cutting blade against a thermoplastic sheet. A molding die that has a molding surface of a predetermined shape and is capable of forming a molded product by bringing a heat-softened thermoplastic sheet disposed in the vicinity of the molding surface into close contact with the molding surface by differential pressure molding;
While being able to press and move toward the periphery of the molded product that is formed into an annular shape corresponding to the shape of the molding surface of the molding die and is in close contact with the molding surface of the molding die, pressing the periphery of the molded product A cutting blade that can be cut,
And a metal holding frame for holding the outer side surface of the annular cutting blade. A molding die that has a molding surface of a predetermined shape and is capable of forming a molded product by bringing a heat-softened thermoplastic sheet disposed in the vicinity of the molding surface into close contact with the molding surface by differential pressure molding;
A metal receiving plate attached to the surface in contact with the heat-softened thermoplastic sheet disposed near the molding surface around the molding surface of the molding die,
And a cutting blade capable of being pressed toward the receiving plate and capable of cutting the periphery of a molded product that is pressed toward the receiving plate and closely contacted with a molding surface of the molding die. Mold for trimming. A heat-softened thermoplastic sheet placed in the vicinity of the molding surface is formed in the molding die by a holding member that can be pressed toward the molding die in opposition to the molding surface of the predetermined molding die. A sheet holding step of pressing and holding around the surface,
A molding step of forming the molded article by bringing the held thermoplastic sheet into close contact with the molding surface of the molding die by differential pressure molding,
By pressing a cutting blade, which is arranged around the holding member and is movable toward the molding die, toward the molding die, the periphery of the molded product pressed and held by the holding member is cut. And a trimming step. A heating unit disposed near a molding surface of a molding die provided on a second table having a molding surface of a predetermined shape opposed to the first table and capable of approaching and separating from the first table. A molding step of forming a molded product by bringing the softened thermoplastic sheet into close contact with the molding surface of the molding die by differential pressure molding,
The first and second tables are brought close to each other, and the periphery of the molded article closely contacting the molding surface of the molding die is pressed by a cutting blade provided on any or a combination of the first and second tables. A trimming process for cutting,
The stopper member provided on any or a combination of the first and second tables is brought into contact at a plurality of positions sandwiching the molding die when the first and second tables are close to each other, A stopping step of stopping the pressing movement of the cutting blade at a predetermined position. A heating unit disposed near a molding surface of a molding die provided on a second table having a molding surface of a predetermined shape opposed to the first table and capable of approaching and separating from the first table. A molding step of forming a molded product by bringing the softened thermoplastic sheet into close contact with the molding surface of the molding die by differential pressure molding,
The first and second tables are brought close to each other, and the periphery of the molded article closely contacting the molding surface of the molding die is pressed by a cutting blade provided on any or a combination of the first and second tables. A trimming process for cutting,
The first and second guide members provided on the first and second tables are fitted to each other at a plurality of positions sandwiching the molding die when the first and second tables are close to each other. A positioning step of positioning a pressing position of the cutting blade against a thermoplastic sheet disposed near the molding surface. A molding step of forming a molded product by bringing a heat-softened thermoplastic sheet disposed in the vicinity of a molding surface of a predetermined molding die into close contact with the molding surface of the molding die by differential pressure molding,
The outer surface is formed by a metal holding frame, which is formed into an annular shape corresponding to the shape of the molding surface of the molding die and can be pressed and moved toward the periphery of the molded product closely contacting the molding surface of the molding die. A trimming step of pressing the periphery of the molded article by a held cutting blade to cut the molded article. In the vicinity of the molding surface of the same molding die, a metal receiving plate is attached to the surface in contact with the heat-softened thermoplastic sheet disposed around the molding surface of the predetermined molding die and in the vicinity of the molding surface. A molding step of forming a molded product by bringing the arranged heat-softened thermoplastic sheet into close contact with the molding surface of the molding die by differential pressure molding,
And a trimming step of cutting the periphery of a molded product in close contact with a molding surface of the molding die by pressing a cutting blade capable of being pressed toward the receiving plate toward the receiving plate. Molding trimming method.

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