JP3705363B2 - Molding trimming apparatus, mold for trimming and molding trimming method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  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.
[0002]
[Prior art]
  Conventionally, this type of molding and trimming apparatus has a heat-softened thermoplastic sheet disposed in an opening of a predetermined molding female mold, and is brought into close contact with the inner surface of the molding female mold by differential pressure molding such as vacuum pressure molding. After forming the molded product, the molded product is transferred to a trimming machine. The trimming machine includes a Thomson blade, and trimming is performed by pressing the Thomson blade against a cutting plate of a thermoplastic sheet on a resin receiving plate such as PP. If the Thomson blade is replaced due to wear or the like, it is necessary to press the thermoplastic sheet uniformly, so that an unevenness removing operation for finely adjusting the height of the blade is performed.
  Further, techniques disclosed in Japanese Patent No. 3193893 and Japanese Patent No. 2849352 are also known. In this technology, an elastic member arranged in an annular shape that clamps a heat-softened thermoplastic sheet around the opening of a female die for molding, and a male blade arranged in an annular shape inside the elastic member. On the same base. Then, the heat-softened thermoplastic sheet is clamped and thermoformed by an elastic member, and after thermoforming, the base is further brought closer to the forming mold and the elastic member is crushed so that the elastic member is crushed. The molded product that is in close contact with the molding female mold is trimmed by the mold blade.
[0003]
[Problems to be solved by the invention]
  The above-described conventional trimming apparatus has the following problems.
  The former molding and trimming apparatus has a problem in that the trimming position varies. In addition, since trimming is performed by pressing the Thomson blade against the resin receiving plate, shavings from the receiving plate may be mixed into the molded product. Furthermore, the unevenness removal operation for finely adjusting the height of the blade when the Thomson blade is replaced is troublesome.
  In the latter molding and trimming apparatus, although the variation in trimming position is less likely to occur, the molded product is molded with the outer side clamped from the part to be trimmed. was there. Moreover, the structure of the receiving part of the male blade is complicated. If a resin receiving plate is used in order to simplify the structure of the receiving portion, another problem arises in that shavings from the receiving plate are mixed into the molded product. Furthermore, finely adjust the blade height when the male blade is replaced.Troublesome unevenness removalWork was also necessary.
  The present invention has been made in view of the above problems,The structure is not complicated,It is an object of the present invention to provide a molding trimming apparatus, a mold for trimming, and a molding trimming method capable of improving the production efficiency when continuously producing a molded product with good quality.
[0004]
[Means for Solving the Problems]
  In order to achieve the above object, the invention according to claim 1 is capable of pressing and moving toward a molding die having a molding surface having a predetermined shape and a molding surface of the molding die opposite to each other. Holding memberAnd a drive mechanism for driving the holding memberA heat-softened thermoplastic sheet disposed in the vicinity of the molding surfaceAround the molding surface of the molding die by the holding member driven in the molding die direction by the driving mechanismA sheet holding mechanism for pressing and holding, a molding mechanism for forming the molded product by bringing the held thermoplastic sheet into close contact with the molding surface of the molding die by differential pressure molding, and a periphery of the holding member. And a cutting blade that can be pressed toward the molding die.The cutting blade is moved in the direction of the molding die by stopping the driving of the holding member in the direction of the molding die with respect to the driving mechanism.A trimming mechanism that presses and cuts the periphery of the molded product pressed and held by the holding member with the same cutting blade is provided.
[0005]
  In other words, the heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die can be pressed and moved toward the molding die opposite to the molding surface of the molding die by the sheet holding mechanism.The holding member driven in the molding die direction by the drive mechanismIs pressed and held around the molding surface of the molding die. Then, the thermoplastic sheet held by the holding member is brought 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. And the periphery of the molded product pressed and held by the holding member isThe cutting blade is moved in the molding die direction by stopping the driving of the holding member in the molding die direction with respect to the drive mechanism.The trimming mechanism is pressed and cut by a cutting blade that is arranged around the holding member and is movable toward the molding die.
  in this way,Since the holding member is driven by the drive mechanism, the structure of the molding trimming device is not complicated,Since the molded product is trimmed by being held by the holding member while being in close contact with the molding surface of the molding die, there is no misalignment of trimming. Further, since the molded product is molded with the inner side being held from the portion to be trimmed, the unevenness of the thickness is reduced. Accordingly, it is not necessary to remove a molded product having a large trimming position shift or a molded product having a large thickness unevenness, and the manufacturing efficiency when continuously manufacturing a molded product having a good quality is improved. Furthermore, since the molded product is trimmed around the holding member, shavings are not mixed even if a receiving plate is used, and the receiving portion of the cutting blade can be made a simple structure.
  The differential pressure forming may be vacuum / pressure forming, vacuum forming, or pressure forming.
  Further, the molding die may be a molding female die capable of drawing a thermoplastic sheet into the opening and intimately contacting the inner surface, or may be a molding male die having a convex molding surface.
[0006]
  Here, as an example of the configuration of the sheet holding mechanism, the invention according to claim 2 is that the molding die is a molding female die that can be molded by drawing the heat-softened thermoplastic sheet into the interior. The holding mechanism is configured to include a plug that is fixed to the holding member and can be advanced and retracted into the female mold. That is, the heat-softened thermoplastic sheet arranged in the vicinity of 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. .
[0007]
  The invention according to claim 3 isThe drive mechanism of the sheet holding mechanism has a cylinder that moves the holding member in the direction of the molding die by supplying air pressure.Air pressure is supplied to the cylinder, and the heat-softened thermoplastic sheet placed near the molding surface of the molding die is held by the holding member.The trimming mechanism stops the supply of air pressure to the cylinder, moves the cutting blade in the direction of the molding die, and presses and cuts the periphery of the molded product with the cutting blade.As a configuration. That is, the holding member holds the thermoplastic sheet softened by heating, which is disposed in the vicinity of the molding surface of the molding die by moving in the molding die direction by a cylinder supplied with air pressure.The trimming mechanism stops the supply of air pressure to the cylinder, moves the cutting blade in the direction of the molding die, and presses and cuts the periphery of the molded product with the cutting blade.
[0008]
  Further, according to a fourth aspect of the present invention, the cutting blade and the cylinder are provided on a table that can approach and separate from the 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 heat-softened thermoplastic sheet disposed in the vicinity of the molding surface is pressed by the holding member. The trimming mechanism stops the supply of air pressure to the cylinder and brings the table closer to the molding surface of the molding die, thereby surrounding the molded product pressed and held by the holding member. The cutting blade is pressed and cut by the cutting blade.
  That is, the holding member moves in the direction of the molding die by a cylinder supplied with air pressure, and the table is placed near the molding surface of the molding die so that the heat softened thermoplastic sheet is disposed in the vicinity of the molding surface. Press and hold. 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 a cutting blade arranged around the holding member. Is cut off.
[0009]
  By the way, when the cutting blade that presses and cuts the thermoplastic sheet can be surely stopped at a predetermined position, it is preferable when continuously molding the molded product. Therefore, NearFirst and second tables capable of contacting and separating, a molding die having a predetermined shape facing the first table, provided on the second table, and 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 into close contact with the molding surface of the molding die by differential pressure molding, and any of the first and second tables Trimming having cutting blades provided in combination or in combination, with the first and second tables being brought close to each other and pressing around the molded product in close contact with the molding surface of the molding die by the same cutting blade The cutting blade is provided in one or a combination of the mechanism and the first and second tables, and comes into contact with a plurality of positions sandwiching the molding die when the first and second tables approach each other. The pressing movement of the In a configuration that includes a stopper member for stoppingGood.
[0010]
  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, thereby forming a molded product. The periphery of the molded product in close contact with the molding surface of the molding die is either the first or second table by the trimming mechanism and the first and second tables (first and second tables) approaching each other. Or 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 in one or the 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 Stop in place.
  Even in such a configuration, the molded product is trimmed in a state of being in close contact with the molding surface of the molding die, so that no misalignment of trimming occurs. In addition, since the stopper member abuts at multiple positions sandwiching the molding die, the stop position of the cutting blade is reliably fixed, and the blade height is less likely to spill, making fine adjustments to the blade height when replacing the cutting blade The frequency of the work to be performed can be reduced, and even if the receiving plate is a resin plate, no shavings are generated from the receiving plate.
According to the above configuration, the trimming position shift is eliminated, and the frequency of the work of finely adjusting the height of the blade that is performed when the cutting blade is replaced becomes difficult because the blade is not easily spilled. Therefore, it becomes possible to improve the production efficiency when continuously producing a molded product having a good quality.
  The table may be one in which both the first and second tables move, or one in which only one moves.
[0011]
  Here, as an example of the configuration of the stopper member,UpThe stopper member includes a plurality of first columnar members protruding from the first table toward the second table, and the second table according to the positions of the plurality of first columnar members. A plurality of second columnar members projecting toward the first table, and the first and second columnar members are in contact with each other at the end opposite to the table.Good.
  That is, when the first and second tables approach each other, the plurality of first and second columnar members come into contact with each other at a plurality of positions sandwiching the molding die, and the pressing movement of the cutting edge stops at a predetermined position.
According to the above configuration, the pressing movement of the cutting blade can be stopped at a predetermined position with a simple configuration.
  Of course, the stopper member can have various shapes, for example, a plate shape. Further, the stopper member may be a single member, for example, a single wall-shaped member formed so as to contact at a plurality of positions sandwiching the molding die.
[0012]
  Also,UpAs one of the first and second columnar members or a combination thereof, a plurality of detachable tapes are laminated and affixed to the end opposite to the table as described above.Good. That is, the position where the first and second columnar members come into contact with each other is changed little by little by removing the tape laminated and pasted on the end of the first and second columnar members opposite to the table. Can do.
According to the above configuration, even if the parallelism of the forming and trimming apparatus is deviated depending on the installation environment, the position where the first and second columnar members come into contact with each other can be easily changed little by little. It becomes possible to recover the degree.
[0013]
  further,UpAs a configuration provided with a length variable mechanism capable of finely adjusting the length protruding from the table in any one or combination of the first and second columnar membersGood. That is, the position where the first and second columnar members come into contact with each other is slightly adjusted by finely adjusting the length of the first or second columnar member protruding from the table in the combination of the first and second columnar members. It can be changed one by one. The length adjusting mechanism can have various configurations, for example, a configuration in which a shim plate is inserted.
According to the above configuration, even if the parallelism of the forming and trimming apparatus is deviated depending on the installation environment, the position where the first and second columnar members come into contact with each other can be easily changed little by little. It becomes possible to recover the degree.
  The length variable mechanism may be configured such that the length protruding from the table can be changed by finely moving one or a combination of the first and second columnar members. Then, by slightly moving one 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 abut can be changed little by little. it can. In this case, the length adjusting mechanism can be configured, for example, by combining an electric motor and a gear, or using a tapered wedge.
[0014]
  By the way, when the pressing position of the cutting blade that presses and cuts the thermoplastic sheet can be positioned, it is preferable when continuously molding the molded product. Therefore, NearFirst and second tables capable of contacting and separating, a molding die having a predetermined shape facing the first table, provided on the second table, and 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 into close contact with the molding surface of the molding die by differential pressure molding, and any of the first and second tables Trimming having cutting blades provided in combination or in combination, with the first and second tables being brought close to each other and pressing around the molded product in close contact with the molding surface of the molding die by the same cutting blade The mechanism is provided on the first and second tables, and 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 so as to be close to the molding surface. On the thermoplastic sheet placed To a structure which comprises a first and second guide members for positioning the pressing position of the cutting edgeGood.
[0015]
  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, thereby forming a molded product. The periphery of the molded product that is in close contact with the molding surface of the molding die is placed on the cutting blade provided on one or a combination of the first and second tables by the trimming mechanism. 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, thereby forming the molding die. The pressing position of the cutting blade against the thermoplastic sheet disposed in the vicinity of the molding surface is positioned.
  Even in such a configuration, the molded product is trimmed in a state of being in close contact with the molding surface of the molding die, so that there is no misalignment of trimming. Further, 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 it is performed when the cutting blade is replaced because it is difficult to spill the blade. The frequency of the fine adjustment of the blade height can be reduced.
According to the above configuration, the trimming position is eliminated, the life of the cutting blade is extended, and the frequency of fine adjustment of the blade height when the cutting blade is replaced can be reduced. It becomes possible to improve the manufacturing efficiency at the time of manufacturing a good molded article continuously.
[0016]
  Here, as an example of the configuration of the guide member,UpThe first guide member includes a plurality of third columnar members protruding from the first table toward the second table, and the second guide members according to the positions of the plurality of third columnar members. A plurality of fourth columnar members projecting from the table toward the first table, and one end of the third and fourth columnar members opposite to the table As a configuration in which a convex portion is formed on the other columnar member and a concave portion that can be fitted to the convex portion is formed at the end of the other columnar member opposite to the table.Good.
  That is, when the first and second tables are close to each other, a plurality of third and fourth columnar members are formed at the positions opposite to the table at a plurality of positions sandwiching the molding die, and the concave portions. And the pressing position of the cutting blade with respect to the thermoplastic sheet disposed in the vicinity of the molding surface of the molding die is positioned.
According to the above configuration, the pressing position of the cutting blade can be positioned with a simple configuration.
  Needless to say, the guide member can have various shapes like the stopper member, and may be, for example, a plate shape. Also, the guide member may be one member for each of the first and second tables, for example, one wall-shaped member formed so as to be fitted at a plurality of positions sandwiching the molding die for each table, and You can also
[0017]
  A position variable mechanism that can slightly change the pressing position of the cutting blade by slightly 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 finely moving the third and fourth columnar members by the position variable mechanism and changing the position protruding from the table.
[0018]
  By the way, when there is a holding frame for holding the cutting blade, it is preferable when continuously molding the molded product. Therefore, PlaceA molding die having a fixed molding surface and a heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die are brought into close contact with the molding surface of the molding die by differential pressure molding. A forming mechanism to be formed, and a cutting edge which is annularly formed corresponding to the shape of the molding surface of the molding die and can be pressed toward the periphery of the molded product in close contact with the molding surface of the molding die The trimming mechanism 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.Good.
[0019]
  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, thereby forming a molded product. The trimming mechanism makes the periphery of the molded product in close contact with the molding surface of the molding die corresponding to the shape of the molding surface of the molding die and around the molded product in close contact with the molding surface of the molding die. It is pressed and cut by a cutting blade that can be pressed and moved. The annular cutting blade has an outer surface held by a metal holding frame.
  Even in such a configuration, the molded product is trimmed in a state of being in close contact with the molding surface of the molding die, so that there is no misalignment of trimming. In addition, since the outer surface of the cutting blade is held by the holding frame, it is difficult to spill the blade, and the frequency of the work of finely adjusting the height of the blade performed when replacing the cutting blade can be reduced, The accuracy of the trimming position is improved. Furthermore, since the holding frame is made of metal, the cooling efficiency is improved, and the accuracy of the trimming position with respect to the heat-softened thermoplastic sheet is also improved in this respect.
According to the above configuration, the position of trimming is eliminated, the life of the cutting blade is extended, and the frequency of fine adjustment of the height of the blade performed when replacing the cutting blade can be reduced. Therefore, it is possible to improve the production efficiency when continuously producing good quality molded products.
[0020]
  Here, as an example of the configuration of the holding frame,UpThe holding frame is made of iron, stainless steel, copper steel, brass or aluminum.Good. 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.
[0021]
According to the above configuration, the holding frame can be formed using a general-purpose material, and the cost can be reduced.
[0022]
  By the way, if there is a backing plate facing the cutting blade, it is suitable when continuously molding a molded product. Therefore, PlaceA molding die having a molding surface having a fixed shape, and a metal backing plate attached to a surface contacting the heat-softened thermoplastic sheet disposed in the vicinity of 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, and the receiving plate And a trimming mechanism that has a cutting blade that can be pressed and moved toward the receiving plate, and that cuts the periphery of the molded product that is in close contact with the molding surface of the molding die.Good.
[0023]
  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, thereby forming a molded product. Around the molding surface of the molding die, a metal backing plate is attached to a surface that comes into contact with the heat-softened thermoplastic sheet disposed in the vicinity of the molding surface. 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 trimming mechanism with a cutting blade that can be pressed toward the receiving plate.
  Even in such a configuration, the molded product is trimmed in a state of being in close contact with the molding surface of the molding die, so that there is no misalignment of trimming. Further, since the backing plate is made of metal, no shavings are generated from the backing plate, and no shavings are mixed into the molded product.
According to the above configuration, the trimming position shift is eliminated, and no shaving from the receiving plate is generated. Therefore, it is possible to improve the manufacturing efficiency when continuously manufacturing a molded product with good quality.
[0024]
  Here, as an example of the structure of the backing plate,UpThe bearing plate is made of iron, stainless steel, copper steel, brass or aluminum.Good. That is, the cutting blade is pressed toward a receiving plate made of iron, stainless steel, copper steel, brass or aluminum, and cuts the periphery of the molded product.
According to the said structure, a receiving plate can be formed using a general purpose material, a cost reduction can be aimed at, and the circumference | surroundings of a molded article can be cut | disconnected reliably.
[0025]
  Also, the above claims 1 toClaim 6As an example of the configuration of the cutting blade in the molding trimming device according to any one ofClaim 7According to the invention, 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 have various shapes.
[0026]
  Further, the above claims 1 toClaim 7As an example of the configuration of the molding die in the molding trimming device according to any one ofClaim 8According to the invention, the molding die is configured by a plurality of female dies and a common housing to which the plurality of female dies are attached. That is, when a mold corresponding to a new molded product is produced, it is only necessary to replace a plurality of female molds without replacing the housing.
  The receiving plate facing the cutting blade may be attached to the housing. This eliminates the need to replace the backing plate when producing a mold corresponding to a new molded product. Further, a cooling mechanism may be provided in the housing. Then, it is not necessary to provide a cooling mechanism for a plurality of female molds, so that the cost for exchanging the molds can be further reduced.
[0027]
  By the way, as an example of the molding trimming apparatus having the various configurations described above,Claim 9As in the invention according to the first and second tables, the molding die,, ReceivedBoard and holding memberAnd a drive mechanism for driving the holding memberA sheet holding mechanism, a forming mechanism, a trimming mechanism having a cutting edge, and a metal holding frameThe secondIt is good also as a structure which comprises the 1st and 2nd guide member.
As in the invention according to claim 10, the cutting blade is a member different from the holding member and is disposed so as to contact the periphery of the holding member and is relatively movable with respect to the holding member. It is good also as a structure made into the member.
  Also, the operation of softening the thermoplastic sheet, transferring the heat-softened thermoplastic sheet and placing it near the molding surface of the molding die, and taking out the molded product whose periphery has been cut out from the molding die is also performed. Anyway,Claim 11It is good also as a structure which comprises a heating softening mechanism, a transfer mechanism, and a molded article extraction mechanism like this invention.
[0028]
  Also,Claims 12 to 14Like this invention, this invention is applicable also as a shaping | molding trimming die which can perform trimming by performing differential pressure molding.
  Furthermore, it is not necessarily limited to a substantial apparatus or mold when performing differential pressure forming and trimming, and it can be easily understood that the method functions as well. Therefore,Claims 15 to 17Like this invention, this invention is applicable also as a shaping | molding trimming method.
  Of course, claim 2, Claims 4 to 9, Claim 11Needless to say, it is possible to make the apparatus configuration described in 1) correspond to the above-mentioned type and method.
[0029]
【The invention's effect】
  As explained above, claim 1,Claim 10, claim 12, claim 14, claim 15, Claim 17According to the invention concerningThe structure of the molding trimming device is not complicated,The trimming position shift is eliminated, and the unevenness of the thickness of the molded product is reduced, so that it is possible to improve the production efficiency when continuously producing a molded product with good quality. Further, since shavings are not mixed even if a backing plate is used, the receiving portion of the cutting blade can be made a simple structure.
  According to the invention of claim 2, since the heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the female mold for molding is pushed into the female mold for molding, a deeper molded product can be molded. Is possible.
  Furthermore, claim 3, Claim 13 and Claim 16According to the 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.
  Furthermore, according to the invention concerning Claim 4, the specific example which shape | molds and trims a thermoplastic sheet reliably can be provided.
[0030]
  And claimsTo 5According to this invention, the positional deviation of trimming is eliminated, and the frequency of the work of finely adjusting the height of the blade that is performed when replacing the cutting blade because it is difficult to spill the blade can be reduced. Therefore, it becomes possible to improve the production efficiency when continuously producing a molded product having a good quality.
[0031]
  Furthermore, according to the invention concerning Claim 6, the press motion of a cutting blade can be stopped in a predetermined position by simple structure.
[0032]
  further,Claim 7According to the invention, it is possible to trim the periphery of the molded product in various shapes using a general-purpose cutting blade.
[0033]
  further,Claim 8According to the invention, since it is only necessary to replace a plurality of female molds when producing a mold corresponding to a new molded product, it is possible to reduce the cost.
[0034]
  further,Claim 9According to the invention, it is possible to provide a specific example of a molding trimming apparatus capable of improving the manufacturing efficiency when continuously manufacturing a molded product with good quality.
  further,Claim 11According to the invention, it is possible to provide a specific example of a molding trimming apparatus capable of continuously producing a molded product with good quality.
[0035]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described in the following order.
(1) Description of molding trimming device:
(2) Operation of molding trimming device:
(3) Modification:
[0036]
(1) Description of 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 molding trimming apparatus 100 is roughly composed of a roll sheet unwinding machine 11 for unwinding a thermoplastic sheet S1 wound in a roll shape, a heating machine 20 for heating and softening the unwound thermoplastic sheet S1, and a heat A transfer machine 13 for transferring the plastic sheet S1, a molding and trimming machine 30 for trimming by forming a molded product of a container by differential pressure molding, and a scrap winder 12 for winding up the scrap of the thermoplastic sheet S1, are trimmed. And a container unloader 60 for removing the container. And the process which manufactures a container is performed continuously.
  In addition, since this invention is applicable to the apparatus which manufactures the trimmed molded article from a thermoplastic sheet, a molded article is not restricted to a container.
[0037]
  In the above configuration, the roll sheet unwinding machine 11 is provided with a roll-shaped thermoplastic sheet S1. The required amount of the thermoplastic sheet S1 is unwound from the roll sheet unwinder 11 sequentially while being sandwiched between the rollers of the transfer device 13. The unrolled thermoplastic sheet S <b> 1 is transferred to the heater 20 by the transfer device 13, radiated and heated by the heater 21 installed on the upper surface of the heater 20, and softened by heating. That is, the heater 20 constitutes the heating softening mechanism referred to in the present invention.
  The heat-softened thermoplastic sheet S1 is further transferred to the molding / trimming machine 30 by the transfer machine 13 and arranged in the opening of the female mold for molding. The forming and trimming apparatus 100 also includes a clamping machine (not shown) that assists the transfer by clamping the side edge portion of the heat-softened thermoplastic sheet S1, and the transfer machine 13 and the clamping machine are the transfer mechanism referred to in the present invention. Is configured.
[0038]
  FIG. 2 shows an external appearance of the molding trimming machine 30 in a perspective view, and FIG. 3 shows a cross section taken along the line AA in FIG. In addition, illustration is abbreviate | omitted about some members, such as a clamp machine which clamps the side edge part of the thermoplastic sheet S1.
  As shown in the figure, the molding and trimming machine 30 includes 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 proximity position. Various members are attached with the tables 31 and 32 as a base. The tables 31 and 32 are fixed to a driving device (not shown) that is driven by hydraulic pressure, for example, and the upper table 31 can be driven up and down while the lower table 32 can be driven up and down.
[0039]
  The lower table 32 is provided with a predetermined molding female mold (molding mold) 41 having an opening 42 a facing the lower surface of the upper table 31. The forming female die 41 is provided at a substantially middle portion of the lower table 32 in FIG. The main mold 41 can form 2 × 2 = 4 containers at a time. Of course, the number of containers that can be formed at one time can be various.
  The forming female die 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 includes a cooling passage (not shown) for preventing a temperature rise due to heat applied from the heat-softened thermoplastic sheet S1. The cooling passage is connected to a cooling liquid circulation mechanism (not shown) so that a cooling liquid such as cooling water passes through the inside. Further, as shown in the exploded perspective view of FIG. 4, the housing 43 has four accommodation ports 43 b penetrating in the vertical direction for accommodating the female mold 42, and has an outer shape in accordance with the shape of the accommodation port. Four processed female dies 42 can be accommodated. Therefore, it is only necessary to replace a plurality of female molds when producing a mold corresponding to a new molded product according to the shape of the container, and it is not necessary to provide a cooling mechanism for the plurality of female molds. Less cost for replacement.
[0040]
  Each female mold 42 is made of metal, and an opening 42 a facing each other is formed on 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 do. Furthermore, a through-hole 42d for vertically passing through a member constituting the knockout mechanism 51 for taking out the molded and trimmed container is also formed.
[0041]
  Around the opening 42 a of the female mold 41 for molding, a metal receiving plate 44 is attached to the surface that contacts the heat-softened thermoplastic sheet disposed in the opening 42 a. The receiving plate 44 is positioned to face an annular Thomson blade 48 described later, and enables the heat-softened thermoplastic sheet S <b> 1 disposed on the upper surface to be cut 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 to be described later, the Thomson blade 48 is prevented from spilling even if the receiving plate 44 is made of stainless steel.
  The backing plate can be made of various materials, and may be made of iron, copper steel, brass, aluminum, or the like. By making the backing plate a general-purpose material such as stainless steel or iron, the cost can be reduced.
  As shown in FIG. 4, the receiving plate 44 is formed with four openings 44 a 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, it is not necessary to replace the receiving plate when producing a mold corresponding to a new molded product, and the cost for exchanging the mold can be reduced. In this embodiment, one receiving plate is provided for four female dies, but a receiving plate may be provided separately for each female die.
[0042]
  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 is capable of being pressed toward the molding female die 41 so as to face each opening 42 a of the molding female die 41. In the present embodiment, fine movement is possible within a range of about 1 to 5 mm. Various materials can be used for the locator, and for example, it can be made of hard resin.
  Then, each locator 45 presses and closely contacts the heat-softened thermoplastic sheet S1 disposed in the opening 42a in the vicinity of the inner side surface 42b around the opening 42a in the female die 41 for molding. It can be retained.
  On the lower surface of each locator 45, a plug 46 that can be advanced and retracted into the molding female die 41 is fixed. These plugs 46 are disposed above the openings 42a corresponding to the female openings 42a. Further, the lower surface of the plug 46 when the upper and lower tables 31 and 32 are in the separated position is higher than the upper surface of the molding female die 41. The thermoplastic sheet S <b> 1 disposed in the female opening 42 a is pushed into the molding female mold 41 when the plug 46 enters the molding female mold 41. Therefore, it is possible to perform so-called deep drawing forming for forming a deep molded product.
[0043]
  Each locator 45 is attached to a cylinder 47 that moves the locator 45 toward 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 that is driven by applying a high-pressure hydraulic pressure. The upper table 31 is formed with a plurality of air supply holes 47 a capable of supplying pressurized air toward the 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 female die 41 for molding. The cylinder 47 can be moved in the vertical direction only within a predetermined range by a mechanism (not shown).
  When the upper and lower tables 31 and 32 are close to each other, the heat-softened thermoplastic sheet S1 disposed in the opening 42a of the female mold for molding with the air pressure supplied to the cylinder 47 is opened in the female mold 41 for molding. It can be pressed and held by the locator 45 around 42a. That is, the locator 45, the plug 46, the cylinder 47, and an air pump (not shown) constitute a sheet holding mechanism referred to in the present invention.
[0044]
  Each combination of locator 45 and cylinder 47 is formed with an air passage 45a communicating with the inside. The air passage 45a is connected to an air pump (not shown) through the upper table 31, and when the 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 molding is performed. Air pressure can be introduced into the female mold 41.
  Then, while supplying the compressed air to the cylinder 47, the upper and lower tables 31, 32 are brought close to each other, the thermoplastic sheet S1 is held by the locator 45, the vacuum pressure is applied to the suction hole 42c, and the 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 pressure air vacuum forming which is differential pressure forming. That is, the vacuum pump connected to the suction hole 42c and the air pump connected to the air passage 45a constitute the molding mechanism referred to in the present invention.
[0045]
  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. 5, the annular Thomson blade 48 has a cutting edge directed downward, and the outer surface 48 a is held by a metal holding frame 49 so that it is below the upper table 31. It is designed to be provided. When the locator 45 is at a predetermined lowered position with respect to the upper table 31, the lower side of the Thomson blade 48 is positioned above the lower surface of the locator 45, and when the locator 45 is at the predetermined raised position, Thomson. The lower side of the blade 48 is set to be lower than the lower surface of the locator 45. When the locator 45 moves from the lowered position to the raised position with reference to the upper table 31, the Thomson blade 48 is lowered together with the upper table 31 so as to press and cut the periphery of the molded product pressed and held by the locator 45. It has become. Thus, since the Thomson blade presses and cuts the periphery of the molded product, there are few shavings by trimming, and the cut surface has a good appearance.
  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 side surface 49a of the holding frame 49 may be formed in accordance with the shape of the outer side surface of the Thomson blade.
  When the upper and lower tables 31 and 32 are brought close to each other by the drive mechanism, the Thomson blade 48 is pressed toward the receiving plate 44 to cut the periphery of the molded product pressed and held by the locator 45. That is, the drive mechanism that drives both the tables 31 and 32 and the Thomson blade 48 constitute a trimming mechanism according to the present invention.
  If the Thomson blade 48 is replaced due to wear or the like, it is necessary to press the thermoplastic sheet S1 uniformly, so that an unevenness operation for finely adjusting the height of the blade is performed.
[0046]
  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 is formed with bolt through holes 49b at the four corners. The bolt through holes 49b are aligned with the bolt holes 31a provided on the lower surface of the upper table 31, and bolts (not shown) are used. It is to be bolted. Then, the Thomson blade 48 is attached to the lower surface of the upper table 31 by holding the Thomson blade 48 on the inner side surface 49 a and bolting the holding frame 49. In this way, since the outer surface of the Thomson blade is held by the holding frame, the Thomson blade is unlikely to spill and the frequency of unevenness removal during replacement can be reduced. Also, the accuracy of the trimming position is good.
[0047]
  When trimming is performed on the heat-softened thermoplastic sheet S <b> 1, heat is transmitted to the Thomson blade 48. When the Thomson blade 48 is held by the plywood plate as in the prior 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, and also in this respect, the trimming position can be improved in accuracy.
  The upper table 31 is formed with a cooling passage through which a cooling liquid such as cooling water passes, and can easily absorb the heat transmitted from the heat-softened thermoplastic sheet S1 to the metal holding frame. .
[0048]
  A plurality of first columnar members 33 projecting toward the lower table 32 are attached to the lower side of the upper table 31. A plurality of second columnar members 34 protruding toward the upper table 31 in accordance with the positions of the first columnar members 33 are attached to the upper side of the lower table 32. These columnar members 33 and 34 are made of stainless steel. When the upper and lower tables 31 and 32 come close to each other, an end portion 33a of the first columnar member 33 opposite to the upper table 31 and an end portion 34a of the second columnar member 34 opposite to the lower table 32 are arranged. Are all in contact at substantially the same time. At this time, adjustment is made so that the cutting edge of the Thomson blade 48 contacts the upper surface of the receiving plate 44.
  Here, since the columnar members 33 and 34 are provided at the four corners of the both tables 31 and 32, the columnar members 33 and 34 on the diagonal line are positioned so as to sandwich the female mold 41 for molding. That is, the columnar members 33 and 34 are stopper members that abut at a plurality of positions sandwiching the molding die 41 and reliably stop the pressing movement of the Thomson blade 48 at a predetermined position. By providing the stopper member, the Thomson blade's pressing motion is surely stopped at a predetermined position, so the Thomson blade is less likely to spill and the frequency of uneven removal during replacement is reduced. Even if it does, shavings will not be generated from the backing plate.
  Note that the stopper member may be provided only on the upper table or 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. Moreover, the stopper member which contact | abuts in the some position which pinches | interposes the shaping | molding female die may be formed with the same member.
[0049]
  A plurality of detachable tapes are laminated and affixed to the end portions 33a, 34a of the columnar members 33, 34 opposite to the tables 31, 32, respectively. A stainless steel tape or the like can be used as the tape. Even if the parallelism of the apparatus 100 is shifted depending on the installation environment, the position where the columnar members 33 and 34 abut can be changed little by little by removing the attached tape one by one. Parallelism can be easily recovered.
  Of course, the tape may be affixed only to the first columnar member 33, or the tape may be affixed only to the second columnar member 34. Even in these cases, the same effect can be obtained.
[0050]
  Thus, since the stop position of the Thomson blade is reliably fixed by providing the stopper member, there is no need to provide a resin plate such as PP as a receiving plate as in the prior art. As a result, it is possible to eliminate the problem of mixing of shavings caused by pressing the Thomson blade against the resin backing plate.
  Even if the Thomson blade is provided on the lower table, the stop position of the Thomson blade is surely fixed by providing the above-described stopper member. Therefore, it is necessary to similarly provide a resin plate such as PP as a receiving plate. This eliminates the problem of mixing chips.
[0051]
  A plurality of third columnar members 35 (35A, 35B) protruding toward the lower table 32 are attached to the lower side of the upper table 31. A plurality of fourth columnar members 36 (36 </ b> A, 36 </ b> B) protruding toward the upper table 31 in accordance with the positions of the respective third columnar members 35 are attached to the upper side of the lower table 32. These columnar members 35 and 36 are also made of stainless steel. A convex portion 36 a is formed at the end of the fourth columnar member 36 opposite to the lower table 32. In addition, a concave portion 35a is formed at the end of the third columnar member 35 opposite to the upper table 31. The concave portion 35a has a shape that can be fitted to the convex portion 36a. When the upper and lower tables 31 and 32 are close to each other, the convex portion 36a and the concave portion 35a are all fitted substantially simultaneously. Here, the columnar members 35 </ b> A and 36 </ b> A and the columnar members 35 </ b> B and 36 </ b> B are positioned to sandwich the female mold 41 for molding. That is, the columnar members 35 and 36 are fitted at a plurality of positions sandwiching the molding female die 41 with a simple configuration, and 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. By providing the guide member, the pressing position of the Thomson blade is surely fixed, so that the Thomson blade is less likely to spill and the frequency of unevenness removal during replacement is reduced.
  In addition, the guide member which contact | abuts in the some position which pinches | interposes the shaping | molding female die may be formed with the same member. Alternatively, 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.
  In addition, even if the Thomson blade is provided on the lower table, the Thomson blade pressing position is surely fixed by providing the above-mentioned guide member. The effect of reducing the frequency of unevenness removal can be obtained.
[0052]
  By the way, the container which has been molded by the molding trimming machine 30 and whose periphery is cut is taken out from the molding female die 41 by the container take-out machine 60. FIG. 6 shows an outline of the container unloader 60. The container V1 and the like are shown in cross section. The container unloader 60 is provided with four suction parts 62 that are the same as the number of containers formed at one time, and can be carried into the container unloader main body 61 by sucking and holding the upper surface of the bottom of the container V1 to the suction part 62. It has become. A vacuum pump 63 is provided in the main body 61, and the suction part 62 is connected to the vacuum pump 63. The main body 61 is also provided with a mechanism that can reciprocate the suction portion 62 within a predetermined range in the horizontal direction and within a predetermined range in the vertical direction. Then, the suction part 62 is arranged on the container V1, the container V1 is raised by the knockout mechanism 51 and the suction part 62 is lowered, and the suction part 62 is lifted by applying the vacuum pressure to the suction part 62, and the main body If it carries in in 61, the container V1 can be taken out from the female die 41 for shaping | molding. The knockout mechanism 51 is configured, for example, by moving a contact member that contacts the lower side of the bottom surface of the container V1 up and down by an air cylinder that is driven by air pressure.
  That is, the container take-out machine 60 and the knockout mechanism 51 constitute a molded product take-out mechanism according to the present invention.
[0053]
  On the other hand, the scrap sheet of the thermoplastic sheet S1 after trimming is wound and collected while being pulled by the scrap winder 12.
  The thermoplastic sheet that can be subjected to differential pressure molding with the molding trimming apparatus 100 having the above-described configuration may be a sheet made of a thermoplastic material. Various materials such as polyethylene resin, polypropylene resin, polystyrene resin, polyvinyl chloride resin, ABS resin, polyethylene terephthalate resin, and polycarbonate resin can be used as the material. In particular, polypropylene resin is a suitable resin because it is relatively inexpensive and has heat resistance during use and good moldability. Various sheet thicknesses can be used.
[0054]
(2) Operation of molding trimming device:
  Next, the operation of the molding and trimming machine 30 of 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 is heated and softened by the heater 20, and the upper and lower tables 31, 32 are in a predetermined separation position. Further, it is assumed that no vacuum pressure is applied to the female suction hole 42 c and no pressurized air is supplied from the air passage 45 a that penetrates the locator 45.
  In this state, the heat-softened thermoplastic sheet S1 is transferred to the molding and trimming machine 30 by the transfer machine 13 (timing T1 to T2). In this embodiment, air pressure is supplied to the cylinder 47 by the air pump at timing T1, and the locator 45 is moved in the direction of the female mold 41 to be lowered to a predetermined lowered position. Then, as shown in FIG. 3, the heat-softened thermoplastic sheet S <b> 1 is disposed in the opening 42 a in the vicinity of the inner side surface 42 b in the molding female mold 42.
  Note that locator 45 may be lowered before timing T1, or locator 45 may be lowered after timing T1 or T2.
[0055]
  After the heat-softened thermoplastic sheet S1 is transferred, the lower table 32 is raised by the table drive mechanism, and the upper table 31 is lowered and brought close to the opening 42a of the female mold (timing T3 to T4). ). Then, as shown in the cross-sectional view of FIG. 8, the descending plug 46 enters the molding female mold 41, and the thermoplastic sheet S1 disposed in the female mold opening 42a is inserted into the molding female mold 41. Push into. 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 that brings the upper and lower tables 31 and 32 close to each other remains, but the locator 45 comes into contact with the thermoplastic sheet S1 on the upper surface of the molding die 41 and the tables 31 and 32 do not come closer to each other. . And 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.
[0056]
  Further, 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 disposed in the female opening 42a. The pressing position of the Thomson blade is positioned. Since the two sets of columnar members 35 and 36 are positioned so as to sandwich the forming female die 41, the pressing position of the Thomson blade is surely constant, the blade is not easily spilled, and the life of the Thomson blade is extended. The frequency of the unevenness removing operation for finely adjusting the height of the blade to be performed can be reduced. Therefore, the production efficiency when continuously producing a molded product having a good quality is improved.
  Note that the four sets of columnar members 33 and 34 are not yet in contact with each other.
[0057]
  Thereafter, air is sucked from the suction hole 42c by a vacuum pump to apply a vacuum pressure to the inside of the molding female die 41, and pressurized 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 pressurized air from above, and the air in the closed space formed by the inner surface 42b of the female mold 42 and the thermoplastic sheet S1 is sucked. The Then, as shown in the cross-sectional view of FIG. 9, the heat-softened thermoplastic sheet S1 is separated from the plug 46 and brought into close contact with the inner side surface 42b of the female mold 41 by differential pressure molding, thereby forming a molded product of the container. The
  Since the molding die 41 is cooled by the coolant flowing through the cooling passage of the housing 43, the temperature of the container in close contact with the inner side surface 42b is reduced.
[0058]
  When the container is formed, supply of air pressure to the cylinder 47 is stopped. Then, the upper and lower tables 31 and 32 come close to each other by the remaining driving force and become a predetermined proximity position, and the locator 45 moves to a predetermined ascending position relative to the upper table 31 as shown in the sectional view of FIG. (Timing T6). That is, the upper table 31 is further close to the opening 42a of the female mold 41, and the periphery of the container in close contact with the inner surface 42b of the female mold 41 is pressed by the Thomson blade 48 while being held by the locator 45. Disconnected. At this time, the columnar members 33 and 34 come into contact with each other at four positions sandwiching the forming female die 41, and the pressing movement of the Thomson blade 48 stops at a predetermined position in contact with the upper surface of the receiving plate 44.
  As described above, the columnar members 33 and 34 come into contact with each other at a plurality of positions sandwiching the molding die, so that the Thomson blade stopping position is surely fixed, and the blade height is less likely to spill and the height of the blade to be changed at the time of replacement is small. The frequency of unevenness adjustment can be reduced. Further, even if the receiving plate is a resin plate, no shavings are generated from the receiving plate. Therefore, the production efficiency when continuously producing a molded product having a good quality is improved.
[0059]
  If the locator is not driven by a driving mechanism such as a cylinder but is directly attached to the lower portion of the upper table, the locator needs to be an elastic member having high elasticity such as rubber. Then, it becomes necessary to perform control to stop the upper and lower tables very accurately on the way, 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 deformation, misalignment of trimming may occur. By providing a locator on the upper table via a driving mechanism such as a cylinder as in the present embodiment, the trimming position is not displaced, and the trimming position accuracy is kept good.
[0060]
  When the periphery of the container is cut by the Thomson blade 48, the air suction from the suction hole 42c is finished and the supply of compressed air from the air passage 45a is finished (timing T7). Thereafter, the upper table 31 is raised and the lower table 32 is lowered, and the upper and lower tables 31, 32 are moved up and down to the separation 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 molding die 41, and the scrap sheet of the thermoplastic sheet S1 after trimming is laterally clamped by a clamping machine. It is clamped and separated from the female mold 41 for molding.
  As shown in FIG. 6, the container V1 left in the female mold 41 is lifted by the knockout mechanism 51 and sucked and held by the suction part 62 of the container unloader 60. Taken from. Thereafter, returning to timing T1, the heat-softened thermoplastic sheet S1 is transferred to the molding trimming machine 30 by the transfer machine 13. At this time, the scrap sheet of the thermoplastic sheet S <b> 1 is also transferred by the transfer machine 13, and is wound and collected while being pulled by the scrap winder 12.
  As described above, the process of forming and trimming the thermoplastic sheet S1 can be continuously performed by repeating the timings T1 to T9.
[0061]
  In this way, the container is held by the locator and trimmed in a state of being in close contact with the female mold for molding, so that no misalignment of trimming occurs. Further, since the container is molded with the inner side being held than the part to be trimmed, the thickness unevenness is small. Therefore, it is not necessary to perform an operation of removing a container having a large trimming position deviation or a container having a large thickness unevenness, and it is possible to improve manufacturing efficiency when continuously manufacturing containers of good quality. Further, by using the receiving plate, the receiving portion of the Thompson blade has a simple structure.
  In addition, since the outer surface of the Thomson blade is held by the holding frame, the service life of the Thomson blade is extended and the frequency of the unevenness removal operation 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 accuracy of the trimming position with respect to the heat-softened thermoplastic sheet can be improved. Even if the Thomson blade is provided on the lower table, by providing the metal holding frame described above, the Thomson blade can be similarly prevented from being deformed by heat, and the trimming position with respect to the heat-softened thermoplastic sheet can be prevented. The effect of improving the accuracy of the is obtained.
  Furthermore, since the receiving plate is made of metal, no shavings from the receiving plate are generated, and the problem of mixing shavings into the container can be solved.
[0062]
(3) Modification:
  In the embodiment described above, the thermoplastic sheet heated and softened by automatic processing is transferred to the molding and trimming machine. However, the thermoplastic sheet heated and softened may be manually supplied to the molding and trimming machine to perform molding and trimming. . In addition, the trimmed molded product may be taken out from the molding die manually. Even in these cases, the molded product is molded while holding the inside of the part to be trimmed and trimmed in that state, so that the trimming position does not shift, and the thickness unevenness is small. Therefore, there is no need to remove a molded product having a large trimming misalignment or a molded product having a large thickness unevenness, and the production efficiency when continuously producing a molded product having a good quality is improved.
[0063]
  In the above-described embodiment, the lower table is provided with a female mold for molding and the upper table is provided with a locator and a Thomson blade. However, the upper table is provided with a female mold for molding and the lower table is provided with a locator and a Thomson blade. 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 direction or the horizontal direction. There may be.
[0064]
  Furthermore, when adjusting the position where the first and second columnar members come into contact with each other, the contact position may be adjusted using an electric motor without using a tape. An example is shown in FIG. This figure shows a partial cross-sectional view of the main part of a molding trimming apparatus according to a modification.
  As shown in the drawing, a stainless steel first columnar member (stopper member) 133 protruding toward the lower table 32 via a first attachment member 133c is attached to the 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. Further, on the upper side of the lower table 32, a second columnar member made of stainless steel (stopper) protruding toward the upper table 31 through the second mounting member 134c in accordance with the position of each first columnar member 133. Member) 134 is attached. The columnar members 133 and 134 on the diagonal lines of the tables 31 and 32 are positioned to sandwich the female mold for molding. When the upper and lower tables 31 and 32 are close to each other, the ends of the first and second columnar members 133 and 134 opposite to the tables 31 and 32 are all in contact with each other substantially at the same time.
[0065]
  Male screws 133d and 134d are formed at the end portions of the first and second columnar members 133 and 134 on the side of the tables 31 and 32, respectively. Female screws 133e and 134e are formed in the first and second mounting members 133c and 134c, respectively, and the male members 133d and 134d are screwed into the female screws 133e and 134e, so that the columnar members 133 and 134 are attached to the table 31, It is attached to attachment members 133c and 134c fixed to 32.
[0066]
  In addition, gears 133f and 134f are externally fitted to substantially intermediate portions of the columnar members 133 and 134 in the vertical direction. On the other hand, the attachment members 133c and 134c are provided with drive gears 133g and 134g connected to the internal electric motor, respectively, and the drive gears 133g and 134g are engaged with the gears 133f and 134f. The electric motor is rotatable in both directions and is 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 gears 133f and 134f. Rotate. Then, the columnar members 133 and 134 rotate, but the male screws 133d and 134d are screwed into the female screws 133e and 134e, so that the columnar members 133 and 134 are slightly moved upward or downward depending on the rotation direction. That is, each part 133c-133g, 134c-134g, and the power switch which is not shown in figure comprise the length variable mechanism which can finely adjust the length which protruded from the table in a 1st, 2nd columnar member.
[0067]
  With the above configuration, even if the parallelism of the molding and trimming device is deviated depending on the installation environment, the position where the first and second columnar members abut can be easily changed little by little. It can be recovered. Also in this modification, the columnar member may be provided only on one of the upper and lower tables as long as the columnar member abuts and stops the pressing movement of the Thomson blade at a predetermined position.
[0068]
  FIG. 13 is a cross-sectional view of the main part of a molding trimming apparatus according to another modification. It is assumed that a total of four first columnar members protruding toward the lower table 32 are provided at the four corners of the upper table on the lower side of the upper table.
  A stainless steel second columnar member 234 protruding toward the upper table 31 via an attachment member 234a is attached to the upper side of the lower table 32 in accordance with the position of each first columnar member. When the upper and lower tables are close to each other, the ends of the first and second columnar members opposite to the table are all in contact with each other substantially simultaneously.
[0069]
  The lower end of the columnar member 234 is tapered (upwardly in the figure) and is inserted into the mounting member 234a. In the mounting member 234a, a tapered wedge 234b whose upper surface is raised to the right in the drawing is inserted 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 abutting columnar member 234 in the vertical direction. Therefore, the position where the first and second columnar members come into contact with 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 shim plates without using an electric motor.
[0070]
  As described above, according to the present invention, it is possible to provide a molding trimming apparatus capable of improving the manufacturing efficiency when continuously manufacturing a molded product with good quality according to various aspects. Of course, the present invention is also effective as a mold for trimming capable of performing trimming by performing differential pressure molding as described above, and as a molding trimming method for performing trimming by performing such differential pressure molding. Is also effective.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing a molding trimming apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view showing an appearance of a molding trimming machine.
3 is a cross-sectional view showing the AA cross section of FIG. 2. FIG.
FIG. 4 is an exploded perspective view of a female mold for molding and a receiving plate.
FIG. 5 is an exploded perspective view showing an essential part of the lower side of the upper table in an exploded manner.
FIG. 6 is a diagram showing an outline of a container unloader.
FIG. 7 is a timing chart showing the operation of the molding trimming machine.
FIG. 8 is a cross-sectional view showing a state where a locator holds a thermoplastic sheet.
FIG. 9 is a cross-sectional view showing a state in which a thermoplastic sheet is brought into close contact with the inner surface of a female mold by differential pressure molding.
FIG. 10 is a cross-sectional view showing a state when a Thomson blade presses and cuts the periphery of a molded product.
FIG. 11 is a cross-sectional view showing a state where the upper and lower tables are separated.
FIG. 12 is a side view showing a partial cross-sectional view of a main part of a molding trimming apparatus according to a modification.
FIG. 13 is a cross-sectional view showing a main part of a molding trimming apparatus according to another modification.
[Explanation of symbols]
11 ... Roll sheet unwinding machine
12 ... scrap winder
13 ... Transfer
20 ... Heating machine
21 ... Heater
30 ... Molding trimming machine
31 ... Upper table
32 ... Lower table
33, 133 ... first columnar member (stopper member)
34, 134, 234 ... second columnar member (stopper member)
35 ... Third columnar member (first guide member)
35a ... concave portion
36 ... Fourth columnar member (second guide member)
36a ... convex portion
41 ... Female mold for molding
42 ... Female type
42a ... opening
42b ... inside surface
42c ... suction hole
42d ... through hole
43 ... Housing
43b ... Housing port
44. Metal backing plate
44a ... Opening
45 ... Locator (holding member)
45a ... Air passage
46 ... Plug
47 ... Cylinder
47a ... Air supply hole
48 ... Thomson blade
48a ... outer side
49 ... Metal holding frame
49a ... inside surface
51 ... Knockout mechanism
60 ... Container unloader
100: Molding and trimming device
133c, 134c ... Mounting member
133d, 134d ... male screw
133e, 134e ... Female thread
133f, 134f, 133g, 134g ... gears
S1 ... thermoplastic sheet
V1 ... container

Claims (17)

A molding die having a molding surface of a predetermined shape;
A heating member disposed in the vicinity of the molding surface, having a holding member facing the molding surface of the molding die and capable of being pressed toward the molding die, and a drive mechanism for driving the holding member A sheet holding mechanism that holds the softened thermoplastic sheet by pressing it around the molding surface of the molding die by the holding member that is driven in the direction of the molding die by the same driving mechanism ;
A molding mechanism for forming the molded product by bringing the held thermoplastic sheet into close contact with the molding surface of the molding die by differential pressure molding;
The cutting member is disposed around the holding member and has a cutting blade that can be pressed toward the molding die, and the driving mechanism stops the driving of the holding member in the molding die direction. A molding trimming apparatus comprising: a trimming mechanism that moves the blade in the molding die direction and presses and cuts the periphery of the molded product pressed and held by the holding member with the cutting blade. The molding die is a female die for molding capable of being molded by drawing the heat-softened thermoplastic sheet therein,
The molding trimming apparatus according to claim 1, wherein the sheet holding mechanism includes a plug that is fixed to the holding member and can be advanced and retracted into the female die for molding. The drive mechanism of the sheet holding mechanism has a cylinder that moves the holding member in the direction of the molding die by supplying air pressure,
The sheet holding mechanism supplies a pneumatic pressure to the cylinder and holds the heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die by the holding member ,
The trimming mechanism is characterized in that the supply of air pressure to the cylinder is stopped, the cutting blade is moved in the direction of the molding die, and the periphery of the molded product is pressed and cut by the cutting blade. The shaping trimming apparatus according to claim 1 or 2 . The cutting blade and the cylinder are provided on a table that can approach and leave 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 bringing the table close to the molding surface of the molding die. Press and hold the heat-softened thermoplastic sheet with the holding member,
The trimming mechanism stops the supply of air pressure to the cylinder and 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 surrounded by the same cutting blade. 4. The molding trimming apparatus according to claim 3, wherein the molding trimming apparatus is pressed and cut. A first table provided with a driving mechanism for the cutting blade and the sheet holding mechanism;
A second table that is close to and away from the first table, and the molding die is provided with the molding surface facing the first table;
While being provided in any one or combination of the first and second tables, when the first and second tables come close to each other, they come into contact with each other at a plurality of positions sandwiching the molding die and the pressing movement of the cutting blade A molding trimming apparatus according to any one of claims 1 to 4, further comprising a stopper member that stops the at least one predetermined position.   The stopper member includes a plurality of first columnar members protruding from the first table toward the second table, and the second table from the second table according to the positions of the plurality of first columnar members. A plurality of second columnar members projecting toward the first table, wherein the first and second columnar members abut against each other at an end opposite to the table. The shaping trimming apparatus according to claim 5. The shaping trimming apparatus according to claim 1 , wherein the cutting blade is a Thomson blade. The molding trimming apparatus 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. A first and a second table, which can be approached and separated, and
A molding surface having a predetermined shape opposite to the first table, and a molding die provided on the second table;
And accepted plate attached to a surface in contact with the thermoplastic sheet heated softened disposed near the same molding surface around the molding surface of the mold for the molding,
A heating member disposed in the vicinity of the molding surface, having a holding member facing the molding surface of the molding die and capable of being pressed toward the molding die, and a drive mechanism for driving the holding member A sheet holding mechanism that holds the softened thermoplastic sheet by pressing it around the molding surface of the molding die by the holding member that is driven in the direction of the molding die by the same driving mechanism ;
A molding mechanism for forming the 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 that is provided on the first table and is arranged around the holding member and can be pressed toward the receiving plate. The holding member is placed in the direction of the molding die on the drive mechanism. After the first and second tables are brought close to each other in the driven state, the drive mechanism is stopped by driving the holding member in the molding die direction with respect to the driving mechanism. a trimming mechanism for cutting the periphery of the pressing retained the molded article of the same cutting edge is moved in the holding member is pressed toward the same receiving plate,
A metal holding frame provided on the first table to hold the outer surface of the annular cutting blade;
Provided on the first and second tables, and 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 in the vicinity of the molding surface. A molding and trimming apparatus comprising: first and second guide members for positioning a pressing position of the cutting blade against the thermoplastic sheet. The cutting blade is a member that is different from the holding member, is disposed so as to contact the periphery of the holding member, and is a member that is movable relative to the holding member. The shaping trimming device according to any one of claims 1 to 9. A heat softening mechanism for heat softening the thermoplastic sheet;
A transfer mechanism for transferring the heat-softened thermoplastic sheet to be disposed in the vicinity of the molding surface of the molding die;
The molding trimming apparatus according to any one of claims 1 to 10, further comprising a molded product take-out mechanism for taking out the molded product having the periphery cut out from the molding die. A molding die having a molding surface of a predetermined shape and 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 heat-softened thermoplastic sheet that can be pressed toward the molding die opposite to the molding surface of the molding die and is driven in the direction of the molding die and disposed in the vicinity of the molding surface A holding member that can be pressed and held around the molding surface of the mold for molding,
A drive mechanism for driving the holding member;
It is arranged around the holding member and can be pressed toward the molding die, and moves in the molding die direction when driving of the holding member in the molding die direction by the driving mechanism is stopped. forming trimming die, characterized by to and a pressed cleavable by cutting the periphery of the pressing retained the molded article in the same holding member. The drive mechanism of the sheet holding mechanism has a cylinder that moves the holding member in the direction of the molding die when air pressure is supplied,
  The holding member holds the heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die by supplying air pressure to the cylinder,
  The cutting blade moves in the direction of the molding die by stopping the supply of air pressure to the cylinder. The mold for trimming according to claim 12, wherein the mold trimming die is capable of being cut by pressing the periphery of the molded product. The cutting blade is a member that is different from the holding member, is disposed so as to contact the periphery of the holding member, and is a member that is movable relative to the holding member. The mold for trimming according to claim 12 or claim 13. The molding surface is driven by the holding member that is driven in the direction of the molding die by a drive mechanism that drives a holding member that opposes the molding surface of the predetermined molding die and can be pressed toward the molding die. A sheet holding step of pressing and holding the heat-softened thermoplastic sheet disposed in the vicinity of the molding surface of the molding die; and
A molding step of 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;
The molding die direction is provided by stopping driving of the holding member in the molding die direction with respect to the drive mechanism with a cutting blade arranged around the holding member and capable of being pressed toward the molding die. And a trimming step of cutting the periphery of the molded product pressed and held by the holding member by being moved toward and pressed toward the molding die. The drive mechanism for driving the holding member has a cylinder that moves the holding member in the molding die direction by supplying air pressure.
  In the sheet holding step, air pressure is supplied to the cylinder to hold the heat-softened thermoplastic sheet disposed near the molding surface of the molding die by the holding member,
  In the trimming step, the supply of air pressure to the cylinder is stopped, the cutting blade is moved in the direction of the molding die, and the periphery of the molded product is pressed by the cutting blade and cut. The molding trimming method according to claim 15. The cutting blade is a member that is different from the holding member, is disposed so as to contact the periphery of the holding member, and is a member that is movable relative to the holding member. The molding trimming method according to claim 15 or 16.

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