JP2010023319A - Stamping molding method and stamping molding mold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stamping molding method which prevents occurrence of burrs in a stamping molded article, and does not adopt a conventional share edge part. <P>SOLUTION: When clamping molds by making an upper mold 2 approach a lower mold 1 from a mold opening state P in which the upper mold 2 provided with a pressing mold 3 and a support mold 4 and the lower mold 1 having a workpiece 9 made of fiber reinforced resin or else softened by heating so as to have fluidity, being mounted thereon are opened, at first the support mold 4 is directly brought into close contact with the lower mold 1 by closing surfaces 10, 11 between the upper mold and lower mold on the outer periphery of the article 9 on the lower mold 1, a working mold 3 is caused to slide along guide surfaces 7, 8 for the support mold 4 toward the lower mold 1, the workpiece 9 in a molding chamber 12 formed to be closed between the upper mold 2 and the lower mold 1 is pressed by the pressing mold 3 and, thereby, the workpiece 9 is charged to a fluid chamber 13 remaining between the workpiece 9 and the closing surfaces 10, 11 to manufacture the molded article 20 of stamping molding in the molding chamber 12, wherein an edge 14 exposed to the fluid chamber 13 on the closing surface 11 of the support mold 4 and an edge 17 exposed to the fluid chamber 13 on the closing surface 10 of the lower mold 1 are directly brought into close contact with a form surface of the molded article 20 itself of stamping molding. As the result, the stamping molding mold preventing a molded article of stamping molding from being burred is provided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for stamping a workpiece such as a fiber reinforced resin sheet that has been softened by heating to give fluidity, and a stamping mold used for the stamping molding method.

  Conventionally, when a battery tray or the like is stamped from a fiber reinforced resin sheet that has been softened by heating to give fluidity, it is common to use a mold having a shear edge structure as shown in FIGS. In this stamping molding, first, as shown in FIGS. 3 (a) and 4 (a), the workpiece 9 (single fiber reinforced resin sheet) is opened in a mold open state P in which the upper mold 2 is opened with respect to the lower mold 1. Or a laminate of a plurality of fiber reinforced resin sheets) is placed on the lower mold 1 and then as shown in FIGS. 3 (b) (c) (d) and FIGS. 4 (b) (c) (d). When closing the mold by bringing the upper mold 2 toward the lower mold 1 and closing the mold, the shear edge portion 21 between the upper mold 2 and the lower mold 1 is slid with respect to each other so that the space between the upper mold 2 and the lower mold 1 By pressurizing the workpiece 9 in the molding chamber 12 while sealing the molding chamber 12, the workpiece 9 remains between the workpiece 9 and the shear edge portion 21 on the outer periphery of the workpiece 9 in the molding chamber 12. The workpiece 9 is filled into the fluid chamber 13 and the stamped molded product 20 is manufactured in the mold closed state Q.

  In the mold having the above-described shear edge structure, when the part 9 between the upper mold 2 and the lower mold 1 is sealed by the shear edge 21, the workpiece 9 is filled when the work chamber 9 is filled. It is possible to prevent burrs from flowing out of the parting portion and occurring in the stamped molded product 20.

  However, the shear edge portion 21 that easily slides and wears every time the mold is closed is more likely to be worn due to the partial pressure generated in the shear edge portion 21 due to the flow pressure difference of the workpiece 9, and a minute gap is easily generated. The burr of the workpiece 9 generated in the minute gap further enlarges the minute gap, and coupled with the short sliding distance of the shear edge portion 21, has a great influence on the eccentricity of the mold and causes the occurrence of the burr. It was. In order to prevent such a problem, the shear edge portion 21 requires a very high machining accuracy and requires a high hardness and an expensive steel material.

  An object of the present invention is to provide a stamping molding method and a stamping mold that do not employ a conventional shear edge portion, thereby preventing burrs generated in a stamped molded product.

The present invention will be described with reference to the drawings of the following embodiments (the first embodiment shown in FIG. 1 and the second embodiment shown in FIG. 2).
In the stamping molding method according to the first aspect of the present invention, the upper mold 2 provided with the pressurizing mold 3 and the support mold 4 disposed on the outer periphery of the pressurizing mold 3, and the fiber softened by heating and softened to have fluidity When the upper mold 2 is relatively moved toward the lower mold 1 from the opened state P where the lower mold 1 on which the workpiece 9 made of reinforced resin or the like is placed is mutually opened, The support die 4 of the upper die 2 is brought into direct contact with the lower die 1 at the outer periphery of the workpiece 9 on the die 1 with the sealing surfaces 10 and 11 between them, and then the pressure die 3 of the upper die 2 is supported by this. The workpiece 9 in the molding chamber 12 formed by sealing between the upper die 2 and the lower die 1 by sliding relative to the lower die 1 with the guide surfaces 7 and 8 between them with respect to the die 4. By pressurizing with the pressurizing die 3, it remains between the workpiece 9 and the sealing surfaces 10 and 11 on the outer periphery of the workpiece 9 in the molding chamber 12. A stamping molded product 20 is manufactured by filling the moving chamber 13 with the workpiece 9, and the edge 14 exposed to the flow chamber 13 at the sealing surface 11 of the support die 4 of the upper die 2 and the sealing surface of the lower die 1. 10, the edge 17 exposed to the fluid chamber 13 is brought into direct contact with the form surface of the stamped molded product 20 itself.

  In the first aspect of the invention, when the mold is closed, the sealing surface 11 of the support mold 4 and the sealing surface 10 of the lower mold 1 are brought into direct contact with each other so that the support mold 4 and the lower mold 1 are integrally supported. In a stable state, the pressure die 3 is slid relative to the support die 4 with the guide surfaces 7 and 8 to press the workpiece 9 with the pressure die 3, so that the support die 4 is not increased in size. It is possible to increase the sliding distance of the pressurizing die 3 with respect to the workpiece 9, and even if an uneven pressure occurs due to the difference in the flow pressure of the workpiece 9, the wear of the guide surfaces 7 and 8 is suppressed and the eccentricity of the pressurizing die 3 is prevented A small gap is less likely to be generated on the guide surfaces 7 and 8, and the occurrence of burrs is prevented. As described above, the contact support portion between the support die 4 and the lower die 1 necessary for the effective guide function of the support die 4 is brought into direct contact with each other by the sealing surfaces 10 and 11, so that the inside of the molding chamber 12 where the sealing is formed is provided. The workpiece 9 does not enter from the end edges 14 and 17 of the sealing surfaces 10 and 11 between the support mold 4 and the lower mold 1 in the flow chamber 13, and the end edges 14 and 17 are formed on the stamping molded product 20 itself. Prevents the generation of burrs by sticking directly to the form surface.

The stamping mold according to the invention of claim 2 is configured as follows.
An upper die 2 provided with a pressure die 3 and a support die 4 arranged on the outer periphery of the pressure die 3 so as to be slidable relative to each other with guide surfaces 7 and 8 between them, and heat softened to give fluidity. And a lower mold 1 on which a workpiece 9 made of fiber reinforced resin or the like can be placed. Between the support mold 4 and the lower mold 1 of the upper mold 2, the upper mold 2 and the lower mold 1 are relatively close to each other from the mold open state P in which the upper mold 2 and the lower mold 1 are opened toward the lower mold 1. When the mold is closed, the sealing surfaces 10 and 11 that are in close contact with the outer periphery of the workpiece 9 on the lower mold 1 are formed. With the sealing surface 11 of the support die 4 of the upper die 2 and the sealing surface 10 of the lower die 1 in direct contact with each other, the pressure die 3 of the upper die 2 is guided to the support die 4 between them. 7 and 8, in the molding chamber 12 in which the upper mold 2 and the lower mold 1 are sealed against each other against the buffering force of the buffering means such as the spring 6 toward the lower mold 1 in the molding chamber 12 The edge 14 exposed to the flow chamber 13 remaining between the workpiece 9 and the sealing surface 11 on the outer periphery of the workpiece 9 and the fluid chamber 13 are formed on the seal surface 11 of the support die 4 of the mold 2. Of the inner surface of the support die 4, the edge 16 of the inner surface 15 adjacent to the sealing surface 11 is in common with each other and is exposed to the flow chamber 13 at the sealing surface 10 of the lower mold 1. 17 and the edge 19 of the inner surface 18 adjacent to the sealing surface 10 among the inner surfaces of the lower mold 1 forming the flow chamber 13 are mutually connected. Common Consistent with, and a common edge 17, 19 of the common edge 14, 16 and a lower mold 1 of the support type 4 into close contact with each other. The workpiece 9 in the molding chamber 12 is pressurized by the pressurizing die 3 to fill the fluid chamber 13 with the workpiece 9 to produce a stamped molded product 20.

  In the second aspect of the invention, similarly to the effect of the first aspect of the invention described above, a minute gap is hardly formed on the guide surfaces 7 and 8 to prevent generation of burrs, and between the lower mold 1 and the support mold 4. In addition to preventing the workpiece 9 from entering the common end edges 14, 16, 17, 19 on the sealing surfaces 10, 11 between them and preventing the generation of burrs, the sealing surfaces 10, 11 are formed by the buffer means 6. Smooth contact and separation can be achieved by the buffering force.

  In the invention of claim 3 based on the invention of claim 2, the sealing surface 11 of the support die 4 of the upper die 2 and the sealing surface 10 of the lower die 1 are respectively the upper die 2 and the lower die 1 respectively. It is orthogonal to the opening / closing direction. In the invention of claim 3, in addition to the effect of the invention of claim 2 described above, the mold closing force applied to the sealing surfaces 10 and 11 at the time of mold closing is a force for separating the sealing surfaces 10 and 11 from each other. As a result, the adhesion of the sealing surfaces 10 and 11 can be maintained.

  In the invention of claim 4 based on the invention of claim 3, the inner surface 15 adjacent to the sealing surface 11 of the support die 4 in the upper die 2 is orthogonal to the sealing surface 11 of the support die 4. For example, the guide surface 8 of the support die 4 is orthogonal to the sealing surface 11 of the support die 4 and is continuous with the inner surface 15. Further, for example, the inner surface 18 adjacent to the sealing surface 10 in the lower mold 1 is orthogonal to the sealing surface 10 of the lower mold 1 or adjacent to the sealing surface 11 of the support mold 4 in the upper mold 2. Perpendicular to the inner surface 15. In the invention of claim 4, in addition to the effect of the invention of claim 3 described above, the flow pressure generated in the flow chamber 13 of the molding chamber 12 is at the common edges 14, 16, 17, 19 of the sealing surfaces 10, 11. It becomes difficult to function as a force for lifting the support die 4, and the adhesion of the sealing surfaces 10 and 11 can be maintained.

  In the invention of claim 5 based on claim 2 or claim 3 or claim 4, the flow chamber 13, the sealing surface 11 and the common edges 14, 16 of the support mold 4, the lower mold 1 The sealing surface 10 and the common end edges 17 and 19 are each continuously extended in an annular shape around the opening / closing direction between the upper mold 2 and the lower mold 1. For example, the guide surface 8 of the support die 4 is also extended annularly. In the invention of claim 5, in addition to the effect of the invention of claim 2, claim 3, or claim 4, the annular sealing surfaces 10, 11 and the common end edges 14, 16, The workpiece 9 can be prevented from entering the workpieces 17 and 19, and the workpiece 9 can be more stably maintained while the pressing die 3 secures a sliding distance with respect to the support die 4 that is in direct contact with the lower die 1. Can be pressurized.

  The present invention can prevent burrs from occurring in the stamped molded product 20 and thus reduce the deburring process, thereby reducing the product cost and the frequency of mold maintenance.

First, a stamping molding method and a stamping mold according to a first embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 1A, the upper mold 2 that can be opened and closed with respect to the lower mold 1 includes a pressure mold 3 and a support mold 4 disposed on the outer periphery of the pressure mold 3. A spring 6 serving as a buffering means is wound around a support shaft 5 that is disposed on the outer periphery of the pressurizing die 3 at an equal interval angle and is movably fitted on the outer periphery of the support die 4 so as to be movable in the up / down direction. The guide surface 7 formed in an annular shape on the outer periphery of the pressure die 3 and the guide surface 8 formed in an annular shape on the inner periphery of the support die 4 are supported so that they can slide in the opening / closing direction. . A single fiber-reinforced resin sheet or a laminate of a plurality of fiber-reinforced resin sheets in which the upper mold 2 is open to the lower mold 1 and the lower mold 1 is heated and softened to have fluidity. A workpiece 9 such as is placed. An annular sealing surface 10 is formed on the upper end of the lower die 1 on the outer periphery of the workpiece 9, and an annular sealing surface 11 is provided on the lower end of the support die 4 of the upper die 2. The sealing surfaces 10 and 11 are smooth surfaces and are orthogonal to the opening and closing direction.

  When the upper mold 2 approaches the lower mold 1 and closes from the mold open state P, first, as shown in FIG. 1B, the support mold 4 is lowered together with the pressurizing mold 3 to support the mold 4. The sealing surface 11 is directly adhered to the sealing surface 10 of the lower mold 1, and the support mold 4 is integrated with the lower mold 1. In the molding chamber 12 sealed between the upper mold 2 and the lower mold 1, an annular flow chamber 13 is formed between the workpiece 9 and the sealing surfaces 10, 11 on the outer periphery of the workpiece 9. Remains. An annular edge 14 exposed to the flow chamber 13 on the sealing surface 11 of the support die 4 and an inner surface of the support die 4 forming the flow chamber 13 adjacent to the seal surface 11 on the guide surface 8. The edge 16 of the continuous annular inner surface 15 is in common with each other. An annular edge 17 exposed to the flow chamber 13 on the sealing surface 10 of the lower mold 1 and an end of the annular inner surface 18 adjacent to the sealing surface 10 among the inner surfaces of the lower mold 1 forming the fluid chamber 13. The edges 19 are in common with each other. The common edges 14 and 16 of the support mold 4 and the common edges 17 and 19 of the lower mold 1 are in close contact with each other, and the inner surface 15 adjacent to the sealing surface 11 of the support mold 4 and the sealing surface of the lower mold 1 The inner surface 18 adjacent to 10 is orthogonal to the sealing surfaces 10 and 11.

  Next, as shown in FIG. 1 (c), the pressing die 3 resists the elastic force (buffer force) of the spring 6 toward the lower die 1 with respect to the support die 4 at the guide surfaces 7 and 8 therebetween. The workpiece 9 is pressed by the pressurizing die 3 in the molding chamber 12 that is sealed between the upper die 2 and the lower die 1. Further, as shown in FIG. 1 (d), the workpiece 9 is moved to the fluid chamber 13 remaining in the molding chamber 12 between the workpiece 9 and the sealing surfaces 10, 11 on the outer periphery of the workpiece 9. The stamped molded product 20 is manufactured by filling. In this closed state Q, the form surface of the stamped molded product 20 itself is exposed to the fluid chamber 13 at the edge 14 exposed to the fluid chamber 13 at the sealing surface 11 of the support die 4 and the sealing surface 10 of the lower die 1. Directly in contact with the edge 17, the workpiece 9 does not enter between the sealing surfaces 10 and 11 from the edges 14 and 17, and generation of burrs between the sealing surfaces 10 and 11 can be prevented. . Thereafter, the upper mold 2 is separated from the lower mold 1 from the mold closed state Q and returns to the mold open state P.

  The stamping molding method and stamping mold according to the second embodiment shown in FIG. 2 have the same basic configuration as that of the first embodiment, and FIGS. 2A, 2B, and 2C of the second embodiment. d) respectively correspond to FIGS. 1A, 1B, 1C, and 1D of the first embodiment, and the inner surface 18 adjacent to the sealing surface 10 of the lower mold 1 is the upper mold 2 of the support mold 4. It differs from the first embodiment in that it is orthogonal to the inner surface 15 adjacent to the sealing surface 11.

This embodiment has the following effects.
* Since the pressurization mold 3 stably presses the workpiece 9 while ensuring the sliding distance against the support mold 4 that is in direct contact with the lower mold 1, the eccentricity of the pressurization mold 3 is prevented and the support mold 4 is supported. Generation | occurrence | production of the burr | flash in the guide surfaces 7 and 8 between the type | molds 4 can be prevented.

  * The edges 14 and 17 on the sealing surfaces 10 and 11 for directly attaching the support die 4 to the lower die 1 are in direct contact with the form surface of the stamped molded product 20 itself, thereby preventing the occurrence of burrs.

* The sealing surfaces 10 and 11 for directly bringing the support die 4 into close contact with the lower die 1 can be buffered by the spring 6 and smoothly contacted and separated.
* Since the sealing surfaces 10 and 11 for directly adhering the support die 4 to the lower die 1 are perpendicular to the opening and closing direction between the upper die 2 and the lower die 1, the sealing surfaces 10 and 11 are closed. It becomes difficult for the forces to function as forces that separate each other, and the adhesion of the sealing surfaces 10 and 11 can be maintained.

  * Since the inner surface 15 adjacent to the sealing surface 11 in the support die 4 of the upper mold 2 is orthogonal to the sealing surface 11, the flow pressure generated in the flow chamber 13 causes the common edges 14, 16 of the sealing surfaces 10, 11. , 17 and 19 are less likely to function as forces separating the sealing surfaces 10 and 11 from each other, and the adhesion of the sealing surfaces 10 and 11 can be maintained.

* The annular pressure die 3 can slide against the annular support die 4 to press the workpiece 9 more stably.
For example, the following embodiment may be configured as follows.

  The flow chamber 13, the sealing surface 11 and the common edges 14 and 16 of the support mold 4, and the sealing surface 10 and the common edges 17 and 19 of the lower mold 1 are the upper mold 2 and the lower mold 1, respectively. Around the opening / closing direction, a plurality of ones having the same circumferential angle may be arranged at equiangular intervals.

  The sealing surface 11 of the support die 4 of the upper die 2, the inner surface 15 adjacent to the sealing surface 11 of the support die 4 of the upper die 2, the sealing surface 10 of the lower die 1, and the lower die 1 About the inner surface 18 adjacent to the sealing surface 10, the angle with respect to the opening / closing direction between the upper mold | type 2 and the lower mold | type 1 can be changed suitably.

  -About the said buffer means, it may replace with the spring 6 and may employ | adopt a gas cushion.

(A) (b) (c) (d) is a schematic sectional drawing which shows 1st Embodiment. (A) (b) (c) (d) is a schematic sectional drawing which shows 2nd Embodiment. (A) (b) (c) (d) is a schematic sectional drawing which shows a 1st prior art. (A) (b) (c) (d) is a schematic sectional drawing which shows a 2nd prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Lower type | mold, 2 ... Upper type | mold, 3 ... Upper type | mold pressurization type | mold, 4 ... Upper type | mold support type | mold, 6 ... Spring as a buffer means, 7 ... Pressurization type | mold guide surface, 8 ... Support type | mold guide surface, 9 ... Workpiece, 10 ... Lower mold sealing surface, 11 ... Support mold sealing surface, 12 ... Molding chamber, 13 ... Flow chamber, 14 ... Edge of support mold sealing surface, 15 ... Support mold inner surface, 16 ... Edge of inner surface of supporting mold, 17 ... Edge of lower mold sealing surface, 18 ... Inner surface of lower mold, 19 ... Edge of inner surface of lower mold, 20 ... Stamping molded product, P ... Mold open state, Q: The mold is closed.

Claims (5)

From an open mold state in which an upper mold having a pressure mold and a support mold disposed on the outer periphery of the pressure mold and a lower mold on which a work piece softened by heating and having fluidity is placed are opened. When closing the mold by relatively approaching the upper mold toward the lower mold, first, the upper mold support mold is directly adhered to the lower mold at the outer periphery of the workpiece on the lower mold with the sealing surface between them. Next, the upper mold pressing mold is slid relative to the support mold at the guide surface between the upper mold and the lower mold so as to be sealed between the upper mold and the lower mold. By pressurizing the object with this pressure mold, the stamping molded product is manufactured by filling the workpiece into the fluid chamber remaining between the workpiece and the outer sealing surface of the workpiece in the molding chamber, The edge exposed to the flow chamber at the sealing surface of the upper support mold and the edge exposed to the flow chamber at the sealing surface of the lower mold are connected to this stamper. Stamping molding method, characterized in that is adhered directly to the form face of the grayed molded article itself. An upper die provided with a pressure die and a support die arranged on the outer periphery of the pressure die so as to be able to slide relative to each other on the guide surface therebetween, and a work piece softened by heating and having fluidity are placed. And a lower mold that can
When the upper mold and the lower mold are closed with the upper mold and the lower mold open relative to each other from the open state, the upper mold is moved toward the lower mold and closed. Forming a sealing surface that adheres directly to the outer periphery of the workpiece,
In the state where the sealing surface of the upper support mold and the sealing surface of the lower mold are in direct contact with each other, the upper pressurizing mold is directed toward the lower mold at the guide surface between them with respect to the support mold. In the molding chamber in which the upper mold and the lower mold are sealed against each other against the buffering force of the upper mold, the work piece and the outer periphery of the work piece are sealed by the sealing surface of the upper mold. The edge exposed to the flow chamber remaining between the sealing surface and the edge of the inner surface of the supporting mold that forms the flow chamber adjacent to the sealing surface are in common with each other. The edge exposed to the flow chamber at the sealing surface of the lower mold and the edge of the inner surface adjacent to the sealing surface among the inner surfaces of the lower mold forming the fluid chamber are in common with each other, The common edge of the support mold and the common edge of the lower mold are brought into close contact with each other,
A stamping mold for manufacturing a stamping molded product by filling a workpiece into the fluidized chamber by pressurizing the workpiece in the molding chamber with a pressure mold. 3. The stamping molding according to claim 2, wherein the sealing surface of the upper mold and the sealing surface of the lower mold are orthogonal to an opening / closing direction between the upper mold and the lower mold. Type. The stamping mold according to claim 3, wherein an inner surface of the upper mold adjacent to the sealing surface of the support mold is orthogonal to the sealing surface of the support mold. The flow chamber, the sealing surface and the common edge of the support mold, and the sealing surface and the common edge of the lower mold, respectively, continuously and annularly extend around the opening and closing direction between the upper mold and the lower mold. The stamping mold according to claim 2, 3 or 4, wherein the stamping mold is formed.

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