KR20060070439A - Press forming equipment - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press molding apparatus, which performs alignment of upper and lower molds mounted on a press molding apparatus, thereby improving the accuracy of molded articles. A base plate (11, 31) for approaching and separating movements with each other, and mold members (19, 39) detachably mounted to the base plate (11, 31); , A press-molding apparatus 1 for pressing the object 2 by the mold members 19 and 39, which is fixed to the base plate 31 and abuts against the mold member 39 to position the mold member 39. And positioning pins 51 and 52 for performing the positioning, the positioning pins 51 and 52 abut against the mold member 19 of the base plate 11 when the base plates 11 and 31 approach. As a result, the mold member 19 is positioned relative to the base plate 31.

Press forming apparatus, base plate, mold member, positioning pin

Description

Press Forming Equipment {PRESS FORMING APPARATUS}

1 is a side view of a thermal transfer press forming apparatus 1 according to an embodiment of the present invention.

2 is a diagram showing a detailed configuration of the thermal transfer press-forming apparatus 1.

3 is a cross-sectional view of the bolt 38 fixture.

It is a figure which shows the cross-sectional shape of the side surface which contacted the positioning plate of a molded article.

5 is a view showing another embodiment of a thermal transfer press molding apparatus.

6 is a view showing another embodiment of a thermal transfer press-forming apparatus.

It is a figure which shows the reference surface for secondary processing of a molded article.

8 is a view showing the prior art.

[Description of Symbols for Main Parts of Drawing]

 1: thermal transfer press forming apparatus

 2: object to be processed

 11, 31: base plate

 12, 32: spacer

 13, 33: insulation board

 14, 34: temperature control plate

 15, 35: stamper

 16, 36: jig

 19, 39: mold member

 21: upper table

 23: lower table

 38: Bolt

 40, 41: positioning device

 51, 52: positioning pin

[Patent Document 1] Japanese Patent Application Laid-Open No. 2003-62845

TECHNICAL FIELD The present invention relates to a press molding apparatus for press molding a workpiece, and more particularly, to a press molding apparatus for performing positioning of a mold to be pressed to improve accuracy.

In thermal transfer press molding, a stamper having a plate thickness of 0.2 to 0.5 mm for transferring a fine pattern is mounted on a temperature control plate having a heating and cooling function, and the temperature control plate is used to After the temperature is heated above the thermal thermosoftening temperature of the thermoplastic workpiece, the stamper is pressed against the surface of the material to transfer-mold the fine pattern onto the surface of the workpiece.

In such thermal transfer press molding, there is known an apparatus for holding an object to be processed such that the object is in contact with a top and bottom stamper at the same time (for example, Patent Document 1).

In the case of a light guide plate which transfer-transforms a fine optical pattern on an upper surface and a lower surface of an acrylic plate or the like, the relative positional shift of the optical pattern transferred and formed on the upper and lower surfaces should be about 0.1 mm or less. Therefore, although the upper and lower stampers must be mounted with good precision so as not to be displaced, Patent Document 1 does not describe the positioning of the stamper and the object to be processed.

In addition, in the case of the light guide plate, since the side surface (light receiving surface) must be a mirror surface, in this secondary processing in which the secondary processing which finishes the side surface of a molded article to a mirror surface by machine processing after press molding is performed, mechanical processing is performed. The machining reference surface for performing this is required at the side corner portion.

However, in thermal transfer press molding, the optical pattern is transferred by pressing a heated stamper on the upper and lower surfaces of the acrylic plate cut to a predetermined size with a press, so that the side surface of the acrylic plate is freely deformed, and Likewise, the upper and lower portions of the side surfaces of the molded article become long protruding shapes. In the state where the reference machining surface is also deformed in this way, the accuracy during secondary machining cannot be secured.

Then, the objective of this invention is to improve the precision of a molded article by aligning the upper and lower molds mounted to a press molding apparatus.

The press-molding apparatus according to one embodiment of the present invention is detachably mounted to the first and second base plates and the first and second base plates which perform approach and anti-movement with each other. The 1st and 2nd mold member is provided, and a process object is pressed by the said 1st and 2nd mold member. And a positioning guide member which is fixed to the first base plate and contacts the first mold member to position the first mold member. The positioning guide member abuts against the second mold member of the second base plate when the first and second base plates approach, thereby positioning the second mold member with respect to the first base plate.

In a preferred embodiment, the positioning guide member includes a first element and a second element for defining a reference position. And the said 1st element is being fixed to the 1st position on the plane which runs parallel to the approaching and carrying direction of the said 1st and 2nd base plate, and this makes a predetermined part of the said 1st mold member the said reference position. And the second element is fixed at a second position on the plane, thereby positioning the first mold member relative to the first direction on the plane, and going directly to the first direction. The thermal expansion in the second direction may be allowed.

In a preferred embodiment, the first and second mold members are rectangular plate members. The first element abuts against a first corner of the first mold member, and the second element abuts near a second corner of the first mold member. The long side or the short side of the one-shaped member may be used.

In a preferred embodiment, the positioning guide member is a positioning pin. The first mold member has a through hole for positioning by passing through the positioning pin, and the second mold member has the positioning pin when the first and second base plates are approached. You may have this penetrating hole.

In a preferred embodiment, the apparatus further includes a positioning device of the object to be processed. The positioning device includes a first positioning unit serving as a reference near the positioning guide member, and a second positioning unit farther away. And the said 1st positioning unit abuts on the 1st part of the said process object, and positions the said 1st part in the predetermined position of a 1st base plate, The said 2nd positioning unit is the said process object The second object may be brought into contact with the second part to press the processing object against the first unit by pressing.

In a preferred embodiment, the positioning device may be attached to the first base plate.

In a preferred embodiment, the object is a plate. The first and second positioning units may be in contact with side surfaces of the object to be processed, and may be supported such that the object is not in contact with the first and second mold members.

In a preferred embodiment, the object is a rectangular plate. The second corner of the object to be processed is fixed to the first base plate, abuts against the side of the first corner of the object, and the second positioning unit is in a diagonal position with the first corner. It may abut on the side surface of and may move forward and backward in the direction of the said 1st corner.

In a preferred embodiment, the positioning device of the object is provided with a movable mechanism in the approach / half direction of the first and second base plates, and when the first and second base plates approach, The object to be processed may be brought into contact with the first and second mold members at substantially the same time.

In a preferred embodiment, the positioning device of the object is in contact with the side surfaces of the first and second corners of the object, even during press molding, and the contact portion has a machining criterion for secondary processing of the object. It may be formed.

EMBODIMENT OF THE INVENTION Hereinafter, the heat transfer press molding apparatus which concerns on one Embodiment of this invention is demonstrated with reference to drawings.

1 is a side view of the thermal transfer press-molding apparatus 1 according to the present embodiment. As shown in the figure, the thermal transfer press-forming apparatus 1 has an upper table 21 and a lower table 23 having mold members 19 and 39, respectively, and they approach each other and release movements. And the plate-shaped object 2 is press-molded.

The upper table 21 includes a base plate 11, from the base plate 11 toward the lower table 23, the spacer 12, the heat insulation plate 13, and a plate-shaped temperature regulating container (hereinafter, referred to as temperature). 14) and a stamper 15 for transferring a predetermined uneven pattern to the object to be processed are stacked in this order. Similarly, the lower table 23 is paired with the spacer 32, the heat insulating plate 33, the temperature control plate 34, and the stamper 15 from the base plate 31 toward the upper table 21. Stampers 35 are stacked in this order. The workpiece 2 pressed between the upper table 21 and the lower table 23 is held from the side by the positioning devices 40 and 41.

The object to be processed 2 is a plate made of a thermoplastic resin, for example, a plate for a light guide plate made of acrylic or polycarbonate. The stampers 15 and 35 are thin plates each having a thickness of about 0.2 to 0.5 mm, for example, made of nickel having a concave-convex shape to be formed on the surface of the light guide plate.

Next, with reference to FIG. 2, the detailed structure of the thermal transfer press forming apparatus 1 is demonstrated. (A) is a top view when the direction of the lower table 23 is seen from the upper table 21, (b) is AA sectional drawing in (a), (c) is BB sectional drawing in (a). to be.

Referring to FIG. 2A, positioning pins 51 and 52 are provided on a plane 310 of the base plate 31 that faces the upper table 21. The heat insulation plate 34 and the temperature control plate 34 are positioned with respect to the base plate 31 in contact with the positioning pins 51 and 52 serving as the positioning guide members. In addition, the stamper 35 is positioned with respect to the temperature control plate 34. Therefore, the mold member 39 which consists of the stamper 35 and the temperature control plate 34 is positioned in contact with the positioning guide member.

Here, the positioning pins 51 and 52 are fixed to the spacer 32 as shown in the same figure (b). Since the spacer 32 is further fixed to the base plate 31 by the knock pin 311, the positioning pins 51 and 52 are fixed to the base plate 31 as a result. Referring to the same figure (a), the positioning pin 51 provided on the plane 310 determines the reference position of positioning. The positioning pins 52 are fixed at positions away from the positioning pins 51 by a predetermined distance in the Y-axis direction in the drawing.

Through-holes 341 and 342 are formed in the temperature control plate 34. The temperature regulating plate 34 is mounted to the through holes 341 and 342 so that the positioning pins 51 and 52 penetrate, thereby positioning. The through-holes are similarly formed in the spacer 32 and the heat insulation plate 33 in the lower layer of the temperature control plate 34, and the positioning pins 51 and 52 penetrate. The temperature regulating plate 34 may be positioned by contacting the positioning guide member, and is not limited to the case where the positioning pin and the through hole are used as shown here.

Here, the through hole 341 is the same diameter as the positioning pin 51, and is the size through which the positioning pin 51 penetrates exactly. In contrast, the through hole 342 is a long hole in the Y-axis direction in the figure. As a result, positioning in the drawing is completely performed in the X-axis direction, while thermal expansion of the temperature control plate 34 is allowed in the Y-axis direction.

On the temperature control plate 34, a jig 36 for determining the position of the stamper 35 is mounted. The jig 36 also has a through hole 361 of the same diameter as the positioning pin 51. The jig 36 is mounted so that the positioning pin 51 penetrates the through hole 361. In addition, the jig 36 is reliably positioned on the temperature control plate 34 by another positioning pin (not shown). The jig 36 has a shape coincident with the corner of the stamper 35 and is in contact with one corner of the stamper 35. As a result, the jig 36 fixes the position of the stamper 35. Here, since the positions of the corners are determined, the positions of the two sides of the stamper 35 are determined, so that the direction of the stamper 35 is also determined. The upper table 21 is provided with a jig 16 (see (b)) having a symmetrical shape with the jig 36.

The temperature control plate 34 is fixed to the bolts 38 and 38 and the spacer 32. Here, sectional drawing of the part fixed with the bolt 38 is shown in FIG. The bolt 38 has a body portion 382 formed between the head portion 381 and the female screw portion 383. The height of the body portion 382 is slightly higher than the sum of the thicknesses of the heat insulating plate 33 and the temperature control plate 34. In addition, the screw hole 343 such as the temperature control plate 34 is wider than the body portion 382, and is formed so that the nonuniformity does not occur even if the temperature control plate 34 is thermally expanded.

Next, referring to the same figure (b), the upper table 21 has a structure common to the lower table 23 except that the positioning pins 51 and 52 are not provided. That is, the spacer 12 is fixed to the base plate 11 by the knock pin 111, and the heat insulating plate 13 and the temperature control plate 14 are fixed to the upper layer of the spacer 12. And through-holes are formed in the spacer 12, the heat insulation board 13, and the temperature control plate 14, respectively. And the stamper 15 is positioned by the jig 16 attached to the temperature control plate 14. As shown in FIG. When the upper table 21 and the lower table 23 approach each other, the positioning pins 51 and 53 pass through the through holes 141 and 142 formed in the temperature control plate 14 of the upper table 21 or the like. do. Thereby, the temperature control plate 14 and the stamper 15 attached thereto are positioned relative to the base plate 31. The temperature control plate 14 is fixed to the spacer 12 with a bolt having the same structure as the bolt 38.

And when attaching the jig 16 for positioning the stamper 15 to the temperature control plate 14, it mounts using dummy pins of the same diameter as the positioning pins 51 and 52. As shown in FIG.

Next, referring to the drawings (a) and (c), the positioning devices 40, 41, 42 of the object 2 are fixed to the base plate 31. The positioning apparatuses 40, 41, and 42 each include mounting blocks 403, 413 fixed to the base plate 31, cylinders 401, 411, 421 fixed to the mounting blocks 403, 413, and And positioning plates 402, 412, 422 mounted to the cylinders 401, 411, 421. Each positioning plate 402, 412, 422 abuts on the side surface of the object 2 to hold the object 2 and performs positioning.

The positioning device 40 is formed in the vicinity of the positioning pin 51 serving as a reference for positioning. The contact surface of the positioning plate 402 with the object to be processed 2 has a rectangular shape so as to be suitable for the corner of the object to be processed 2. The positioning plate 402 is able to move forward and backward with respect to the diagonal direction of the object to be processed 2 by the cylinder 401. When performing positioning, the cylinder 401 abuts the positioning plate 402 in the diagonal direction of the object to be processed 2.

The positioning device 42 is formed at a position away from the positioning device 40 in the Y-axis direction, that is, in the vicinity of the positioning pin 52. The cylinder 421 advances and retracts the positioning plate 422 in the X-axis direction, and abuts against the object to be processed 2.

The positioning device 41 is formed at a diagonal position of the object to be processed 2 of the positioning device 40. The positioning device 41 has the same configuration as the positioning device 40 and is disposed so as to face the positioning device 40. That is, the positioning device 41 presses the processing object 2 toward the positioning device 40 to perform positioning.

When the positioning apparatuses 40, 41, 42 which have the above structures perform positioning of the object to be processed 2, the positioning plate 402 and the positioning plate 422 are fixed first, and then the object to be processed. After bringing in (2), the cylinder 411 advances the positioning plate 412, and the positioning plates 402, 412, and 422 pressurize and support the object 2 from the side, respectively, and positioning Is done. Thereby, the position of the object to be processed 2 can be freely determined.

Here, the cross-sectional shape of the side surface which abuts on the positioning plates 402, 412, 422 of the press-processed object (molded object) becomes as shown in FIG. That is, since the portion 210 where the positioning plates 402, 412, 422 abut is not affected by the deformation caused by the press, the shape of the contact surface of the shape of the positioning plates 402, 412, 422 ( Plane) is maintained. Therefore, any one of the corners which the positioning plates 402 and 412 contact can be used as a machining reference surface at the time of secondary processing. In particular, when the positioning device 40 described next is a fixed type, the corner which abuts with the positioning plate 402 may be used as a machining reference plane.

Thus, as shown in FIG. 7, for example, when the processing reference plane is molded, the inclination with respect to the object 2 of the transferred pattern can be pressed within 0.1 degrees, and a processing margin of about 0.5 to 1.0 mm can be secured. Can be.

The positioning apparatuses 40 and 42 may be configured without a cylinder as shown in Fig. 5A. That is, the position of the positioning plate 404 is fixed with respect to the base plate 31, and only the positioning plate 412 may be movable.

In addition, as shown in FIG.5 (b) and (c), the structure which the positioning apparatus 40, 41, 42 is equipped with the movable mechanism 405,415 which moves to an up-down direction may be sufficient. Thereby, the positioning devices 40, 41, 42 can move up and down in the state which hold | maintained the process target object 2. As a result, the workpiece 2 can be brought into contact with the stampers 15 and 35 at substantially the same time. Here, as shown further, the pressure rods 406 and 416 may be further provided in the upper table 21.

And in the press-molding apparatus of the aspect of FIG. 5 (c), it is a state when the object 2 is carried in between the upper table 21 and the lower table 23, and the state before pressing is pressed, and a state when it presses. The figure which shows is shown in FIG.

The embodiment of the present invention described above is an illustration for explaining the present invention, and the scope of the present invention is not limited only to these examples. Those skilled in the art can implement the present invention in other various aspects without departing from the gist of the present invention.

For example, the positioning device of the object to be processed may not necessarily be fixed to the base plate. For example, it may be fixed to the structure which is not shown of a press molding apparatus, and may be fixed to another apparatus.

As mentioned above, according to the press molding apparatus, this invention can perform the alignment of the upper and lower molds mounted in a press molding apparatus, and can improve the precision of a molded article.

Claims (10)

First and second base plates that approach and displace each other, and first and second mold members detachably mounted to the first and second base plates. And a press-forming apparatus for pressing the object to be processed with the first and second mold members, A positioning guide member fixed to the first base plate to contact the first mold member to position the first mold member, The positioning guide member abuts against the second mold member of the second base plate when the first and second base plates are approached, thereby press-positioning the second mold member with respect to the first base plate. . The method of claim 1, The positioning guide member, And a first element and a second element for defining the reference position, The first element is fixed at a first position on a plane perpendicular to the approaching and displacing directions of the first and second base plates, thereby positioning a predetermined portion of the first mold member at the reference position, The second element is fixed at a second position on the plane, thereby positioning the first mold member relative to the first direction on the plane, and also in a second direction that is perpendicular to the first direction. Press forming apparatus, characterized in that to allow thermal expansion. The method of claim 2, The first and the second mold member is a rectangular plate (,), The first element abuts near a first corner of the first mold member, The second element abuts near a second corner of the first mold member, And the second direction is a long side or a short side of the first mold member. The method of claim 1, The positioning guide member is a positioning pin, The first mold member has a through hole for positioning by passing through the positioning pin; And said second mold member has a through hole through which said positioning pin passes when said first and second base plates approach. The method of claim 1, Further provided with a positioning device for the processing object, The positioning device includes a first positioning unit serving as a reference near the positioning guide member, and a second farther positioning unit, The first positioning unit abuts on a first portion of the object to be processed, positions the first portion at a predetermined position of a first base plate, And the second positioning unit is in contact with a second portion of the object to be pressed to press the object to be pressed to the first unit by pressing. The method of claim 5, And said positioning device is mounted to said first base plate. The method of claim 5, The object to be processed is a plate, And said first and second positioning units abut against side surfaces of the object to be processed, and support the object not to contact the first and second mold members. The method of claim 5, The object to be processed is a rectangular plate, The first positioning unit is fixed to the first base plate and abuts the side surface of the first corner of the workpiece. The second positioning unit is in contact with the side surface of the second corner of the object to be disposed at a position diagonal to the first corner, and is capable of advancing and retracting in the direction of the first corner. The method of claim 5, The positioning apparatus of the said processing object is equipped with the movable mechanism of the said 1st and 2nd base plate to the approaching and distal direction, and when the said 1st and 2nd baseplate approach, the said processing object is a said 1st And contacting the second mold member at about the same time. The method of claim 8, The positioning device for the workpiece is in contact with side surfaces of the first and second corners of the workpiece, even during press molding, and sets a machining criterion for secondary processing of the workpiece on the abutting portion. Press forming device.

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