JP2005280004A - Mold assembly, molded product, molding method thereof and molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the cost of a mold assembly and to sufficiently prevent the occurrence of the pitch shift of a guide post and a guide bush. <P>SOLUTION: The mold assembly has a first mold member, the first disk-shaped member attached to the first mold member, the second mold member arranged so as to freely advance and retreat with respect to the first mold member, the second disk-shaped member attached to the second mold member arranged in opposed relation to the first disk-shaped member and forming a cavity space along with the first disk-shaped member at the time of mold clamping, the guide bush 81 attached to one of the first and second mold members and the guide post attached to the other one of the first and second mold members and inserted in and detached from the guide bush 81 accompanied by the advance and retreat of the second mold member. Flow channels for flowing a temperature control medium are formed in the first and second disk-shaped members and the first and second mold members. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mold apparatus, a molded product, a molding method thereof, and a molding machine.

  Conventionally, in a molding machine for molding a disk substrate as a molded product, for example, an injection molding machine, a resin melted in a heating cylinder is filled in a cavity space of a mold apparatus, and the cavity space is filled. The disk substrate is obtained by cooling and solidifying the resin inside.

  For this purpose, the injection molding machine includes: a mold apparatus including a fixed mold assembly and a movable mold assembly; an injection apparatus for filling the cavity space with the resin; and the movable mold. A mold clamping device is provided for bringing the mold assembly into and out of contact with the stationary mold assembly. Then, the mold assembly on the movable side is advanced and retracted by the mold clamping device, the mold device is closed, the mold is clamped, and the mold is opened. When the mold is clamped, it is movable with the mirror surface of the fixed mold assembly. A cavity space is formed between the mirror assembly of the side mold assembly. In the mold assembly on the fixed side, the mirror plate is attached to the base plate. In the mold assembly on the movable side, the mirror plate is attached to the intermediate plate, and the intermediate plate is attached to the base plate.

  The injection device includes a heating cylinder, an injection nozzle attached to the front end of the heating cylinder, and a screw that is rotatably and reciprocally disposed within the heating cylinder.

  In the metering step, the screw is rotated, the resin is melted and stored in front of the screw, and the screw is retracted accordingly, during which the mold device is closed and clamped. Is called. Subsequently, in the injection step, the screw is advanced, and the resin stored in front of the screw is injected from the injection nozzle to fill the cavity space. In the cooling step, the resin in the cavity space is cooled, drilling is performed, and a disk substrate is formed. Subsequently, mold opening is performed, and the disk substrate is taken out.

  A guide post is attached to a predetermined part of the fixed base plate so as to protrude toward the movable mold assembly, and a guide bush is disposed at a part corresponding to the guide post in the movable intermediate plate. As the movable die assembly is advanced and retracted, the guide post is inserted into and removed from the guide bush. Along with this, the fixed mold assembly and the movable mold assembly are aligned.

  A stamper is attached to the fixed-side mirror plate, and as the cavity space is filled with the resin, a fine pattern of pits formed on the stamper is transferred to the resin, and the unevenness constituting the information surface of the disk substrate Is formed.

  By the way, a sprue is formed in the sprue bush on the fixed side, and the front end of the sprue constitutes a gate serving as an inlet for the resin filled in the cavity space, and the resin passes through the sprue and passes through the gate in the cavity space. And flows in the cavity space outward in the radial direction.

  Therefore, a temperature gradient is formed in the cavity space, and the temperature of the resin is higher as it is closer to the gate and lower as it is closer to the outer peripheral edge. As a result, the transferability of the stamper pattern is higher as it is closer to the gate and lower as it is closer to the outer periphery.

  Therefore, a flow path is formed in each fixed-side and movable-side mirror surface plate, and each mirror surface plate is cooled by flowing a temperature control medium through the flow channel, thereby suppressing the formation of a temperature gradient in the cavity space. Like to do.

  However, each of the mirror plates is cooled, but the base plate that supports the fixed-side mirror plate and the intermediate plate that supports the movable-side mirror plate are not cooled. When the pitch deviation of the guide bushes occurs, the guide posts and the guide bushes do not become parallel, and the alignment accuracy between the fixed side mold and the movable side mold becomes low.

Therefore, a flow path is formed in each guide ring disposed radially outward from each mirror surface plate, and each guide ring is cooled by flowing a temperature adjusting medium through the flow path (for example, , See Patent Document 1).
JP 2002-331557 A

  However, in the conventional mold apparatus, not only a supply path for supplying a medium to a flow path in each mirror plate but also a supply path for supplying a medium to the flow path in each guide ring is formed. Therefore, the piping work is troublesome and the cost of the mold apparatus is increased.

  Further, even if each guide ring is cooled, the fixed base plate and the movable intermediate plate are not cooled, so that it is possible to sufficiently prevent the guide posts and the guide bushes from being displaced in pitch. Can not do it.

  The present invention solves the problems of the conventional mold apparatus, can reduce the cost, and can sufficiently prevent the occurrence of pitch deviation between the guide post and the guide bush, It aims at providing a molded article, its molding method, and a molding machine.

  Therefore, in the mold apparatus according to the present invention, the first mold member, the first plate-like member attached to the first mold member, and the first mold member are arranged so as to be movable forward and backward. A cavity space between the second plate member provided and the first plate-like member attached to the second die member and opposed to the first plate-like member, and at the time of clamping. A second disk-shaped member that forms a guide, a guide bush attached to one of the first and second mold members, and a second one attached to the other of the first and second mold members, And a guide post that is inserted into and removed from the guide bush as the mold member 2 moves back and forth.

  And the flow path for flowing the medium for temperature control in the said 1st, 2nd disk-shaped member and the 1st, 2nd type | mold member is formed.

  In another mold apparatus of the present invention, each of the flow paths further includes a main cooling section in the first and second plate-shaped members and an auxiliary cooling section in the first and second mold members. . Each auxiliary cooling part is formed radially outward from the main cooling part.

  In still another mold apparatus of the present invention, each of the auxiliary cooling portions further includes a flow path portion formed between the guide bush and the guide post and the main cooling portion.

  In still another mold apparatus of the present invention, each main cooling part and each auxiliary cooling part are further connected via a connection part.

  In still another mold apparatus of the present invention, the medium is further sent from the medium inlet to the auxiliary cooling part on the medium inlet side, and sent to the main cooling part via the connection part on the medium inlet side. After being sent from the main cooling part to the auxiliary cooling part on the medium outlet side via the connection part on the medium outlet side, it is discharged from the medium outlet.

  In the molded product of the present invention, the first mold member, the first plate member attached to the first mold member, and the second mold member disposed so as to be movable forward and backward with respect to the first mold member. A mold member, a second plate attached to the second mold member, disposed opposite to the first plate member, and forming a cavity space with the first plate member during mold clamping And a guide bush attached to one of the first and second mold members, and attached to the other of the first and second mold members and fitted into the guide bush when the mold is closed. (C) Gold having a guide post to be inserted and having a flow path for flowing a temperature adjusting medium in the first and second plate-shaped members and the first and second mold members. Molding is performed by a mold apparatus.

  Then, a molding material is filled into the cavity space through the sprue, the molding material is cooled to form a molded product prototype, the processed member is advanced, and the molded product prototype is subjected to predetermined processing. Is molded by.

  In the molding method of the present invention, a first mold member, a first plate-like member attached to the first mold member, and a second mold disposed so as to be movable forward and backward with respect to the first mold member. A mold member, a second plate attached to the second mold member, disposed opposite to the first plate member, and forming a cavity space with the first plate member during mold clamping And a guide bush attached to one of the first and second mold members, and attached to the other of the first and second mold members, and fitted into the guide bush when the mold is closed. Formed by a mold apparatus having a guide post that is formed with a flow path for flowing a temperature adjusting medium in the first and second plate-like members and the first and second mold members. The product is to be molded.

  Then, a molding material is filled into the cavity space through the sprue, the molding material is cooled to form a molded product prototype, the processed member is advanced, and the molded product prototype is subjected to predetermined processing. The molded product is molded by

  The molding machine of this invention is equipped with the metal mold apparatus of any one of Claims 1-5.

  According to the present invention, in the mold apparatus, the first mold member, the first plate-like member attached to the first mold member, and the first mold member are disposed so as to be movable forward and backward. A cavity space between the second plate member provided and the first plate-like member attached to the second die member and opposed to the first plate-like member, and at the time of clamping. A second disk-shaped member that forms a guide, a guide bush attached to one of the first and second mold members, and a second one attached to the other of the first and second mold members, And a guide post that is inserted into and removed from the guide bush as the mold member 2 moves back and forth.

  And the flow path for flowing the medium for temperature control in the said 1st, 2nd disk-shaped member and the 1st, 2nd type | mold member is formed.

  In this case, since the flow path for flowing the temperature adjusting medium is formed in the first and second plate-shaped members and in the first and second mold members, the guide post and the guide bush are formed by thermal expansion. Can be sufficiently prevented from occurring. Therefore, the guide posts and the guide bushes are parallel to each other, and the alignment accuracy between the fixed side mold and the movable side mold can be increased.

  Further, since no flow path is formed in each guide ring disposed radially outward from the first and second plate-like members, piping work can be simplified and the cost of the mold apparatus can be reduced. can do.

  In another mold apparatus of the present invention, each of the flow paths further includes a main cooling section in the first and second plate-shaped members and an auxiliary cooling section in the first and second mold members. . Each auxiliary cooling part is formed radially outward from the main cooling part.

  In this case, since each auxiliary cooling part is formed radially outward from the main cooling part, the part to which the guide bush and the guide post are attached can be sufficiently cooled.

  Therefore, the accuracy of alignment between the fixed side mold and the movable side mold can be further increased.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front view showing a main part of a movable mold assembly in an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a main part of a mold apparatus in an embodiment of the present invention, and FIG. It is an enlarged view which shows the principal part of the metal mold | die apparatus in embodiment of invention.

  In the figure, reference numeral 12 denotes a fixed-side mold assembly attached to a fixed platen (not shown) by means of a bolt (not shown) via a mounting plate (not shown). The mold assembly 12 is used as a first mold member. Base plate 15, mirror surface plate 16 as a first plate-like member attached to base plate 15 by bolt b 1, and sprue bush 24 attached to base plate 15 and attached by bolt b 2 in base plate 15. Prepare. At the front end (lower end in FIG. 2) of the sprue bushing 24, a die 28 having a recess facing the cavity space C is provided, and at the rear end (upper end in FIG. 2) of the sprue bushing 24 is an injection nozzle of an injection device (not shown). The nozzle touch part 29 which consists of a recessed part for making it contact is formed. Then, a sprue 26 is formed from the front end to the rear end of the sprue bush 24 and in communication with the die 28 and the nozzle touch part 29 to pass resin as a molding material injected from the injection nozzle. . The front end of the sprue 26 constitutes a gate serving as an inlet for resin filled in the cavity space C.

  Further, in the present embodiment, an annular flow path 27 for flowing water such as water, oil, air, gas, or the like as the first temperature control medium is formed in the vicinity of the die 28. When water from a medium supply source (not shown) is supplied to the passage 27 via the supply passage 30, the front end portion (in particular, the lower end portion in FIGS. 2 and 3) of the sprue bush 24 is cooled to a predetermined temperature. The inner stamper holder 14 that is disposed radially outward of the front half (the lower half in FIGS. 2 and 3) of the sprue bushing 24 and that holds and holds the inner periphery of the stamper (not shown) is cooled. The inner stamper holder 14 is engaged with and disengaged from the base plate 15 by rotating a rod 25 that is rotatably disposed so as to face the rear end, and presses the inner periphery of the stamper to the outer periphery. A nail is formed.

  The injection device includes a heating cylinder, an injection nozzle attached to the front end of the heating cylinder, and a screw that is rotatably and reciprocally disposed in the heating cylinder.

  Then, the stamper is detachably attached to the mirror surface plate 16, and as the cavity space C is filled with the resin, a fine pattern of pits formed on the stamper is transferred to the resin, and as a molded product. Concavities and convexities constituting the information surface of the disk substrate are formed.

  An annular abutting ring 18 is attached to the outer peripheral edge of the mirror surface plate 16 by a bolt b3, and an annular first outer peripheral ring 19 is provided radially outward from the mirror surface plate 16 and the abutting ring 18 by a bolt b4. Attached to the base plate 15.

  On the other hand, 32 is a movable-side mold assembly attached to a movable platen (not shown) by a bolt (not shown). The mold assembly 32 advances and retreats as the movable platen advances and retreats (in FIG. The mold assembly 12 is moved toward and away from the mold assembly 12.

  The mold assembly 32 includes a base plate 35, an intermediate plate 40 attached to the base plate 35 with bolts b5, a mirror plate 36 serving as a second plate member attached to the intermediate plate 40 with bolts b6, and the intermediate plate 40. A cylindrical bush 47 disposed in the plate 40 and attached to the intermediate plate 40 by bolts b7, and a cylindrical cut punch 48 disposed in the bush 47 so as to be freely advanced and retracted by a bearing 49 as a linear bearing portion. , A rod-like protruding pin 50 movably disposed in the cut punch 48, a cut punch block 52 disposed in the base plate 35, and a cut punch block 52 disposed in the base plate 35. Penetrating and slidable with respect to the cut punch block 52 Comprising a set has been thrusting rod 53 and the like. The base plate 35 and the intermediate plate 40 constitute a second mold member.

  In the present embodiment, a stamper is attached to the mirror surface board 16, but a stamper can be attached to the mirror surface board 36.

  The bush 47 is disposed with the front end (upper end in FIG. 2) facing the cavity space C, extends rearward (downward in FIG. 2) through the mirror surface plate 36, and is arranged at the rear end (lower end in FIG. 2). The flange portion f1 is attached to the intermediate plate 40 by the bolt b7. A slight clearance is formed between the outer peripheral surface of the bushing 47 and the inner peripheral surfaces of the mirror surface plate 36 and the intermediate plate 40, and compressed air is supplied to the clearance. The air is blown into the cavity space C from an air blow slit formed by the outer peripheral surface of the bush 47 and the inner peripheral surface of the specular disc 36 at the front end.

  The cut punch 48 is disposed with its front end facing the cavity space C, extends rearward through the mirror surface plate 36 and the intermediate plate 40, and contacts the cut punch block 52 at the flange portion f2 at the rear end. Touched. Accordingly, by driving a cut punch cylinder as a cut punch drive unit (not shown), the cut punch block 52 can be advanced and retracted, and the cut punch 48 can be advanced and retracted. The front end of the cut punch 48 has a shape corresponding to the shape of the die 28, and the front end is advanced into the die 28 by moving the cut punch 48 forward (moving upward in FIG. 2). be able to.

  Further, in the present embodiment, an annular channel 55 for flowing air, such as air and gas as the second temperature adjusting medium, surrounds the cut punch 48 in the vicinity of the front end of the bush 47. When the air is supplied to the flow path 55 from a medium supply source (not shown), the bush 47 is cooled, and the front end portion (upper end portion in FIG. 2) of the cut punch 48 is kept at a predetermined temperature. To be cooled. In addition, water, oil, etc. can also be used as a 2nd medium for temperature control.

  The protruding pin 50 is disposed with its front end facing the cavity space C, extends rearward through the mirror plate 36 and the intermediate plate 40, and is brought into contact with the protruding rod 53 at the rear end. Therefore, by driving a projecting cylinder as a projecting drive unit (not shown), the projecting rod 53 can be advanced and retracted, and the projecting pin 50 can be advanced and retracted. A spring 54 as an urging member extends in the axial direction between the cut punch 48 and the protruding pin 50, and protrudes with a predetermined urging force to urge the pin 50 rearward. To do.

  An annular cab ring 37 is disposed on the outer peripheral edge of the mirror plate 36 so as to be movable with respect to the mirror plate 36 and opposed to the abutment ring 18, and the mirror plate 36 and the cab ring 37. More outward in the radial direction, an annular second outer peripheral ring 38 is attached to the intermediate plate 40 by bolts b9 so as to face the first outer peripheral ring 19. The second outer peripheral ring 38 also functions as a cabling presser and is locked to the outer peripheral edge of the cabling ring 37.

  Further, a guide rod 41 is attached to the cavity ring 37, and the cavity ring 37 can be advanced and retracted by advancing and retracting the guide rod 41 along a guide hole formed in the intermediate plate 40. The cavity ring 37 is projected from the front end surface (the upper end surface in FIG. 2) of the mirror surface plate 36, and the inner peripheral surface of the cavity ring 37 constitutes the outer peripheral edge of the cavity space C.

  A plurality of vent holes 64 are formed radially and at equal pitch angles in the vicinity of the front end face of the cavity ring 37. Further, a plurality of degassing grooves are formed on the front end surface (the lower end surface in FIG. 2) of the first outer peripheral ring 19 (shown in FIG. 1 for the sake of convenience in the front end surface of the second outer peripheral ring 38). 65 is formed in communication with each of the pores 64 radially and at an equal pitch angle. The first gas flow path is formed by the pores 64, and the second gas flow path is formed by the grooves 65.

  By the way, a mold apparatus is constituted by the mold assemblies 12, 32, and a mold clamping apparatus (not shown) is provided to bring the mold assembly 32 into and out of contact with the mold assembly 12. By driving a mold clamping cylinder as a mold clamping drive unit of the mold clamping device and moving the mold assembly 32 forward and backward, the mold device can be closed, clamped and opened. When the mold is clamped, the cavity space C is formed between the mirror plates 16 and 36. In this case, the mold assembly 12 and the mold assembly 32 are aligned so that mold closing and mold opening can be performed smoothly. Therefore, a guide post (not shown) is attached to a predetermined portion of the base plate 15 so as to protrude toward the mold assembly 32, and a guide bush 81 is disposed at a portion corresponding to the guide post in the intermediate plate 40, As the mold assembly 32 advances and retracts, the guide post is inserted into and removed from the guide bush 81. Then, the guide post is fitted into the guide bush 81 when the mold is closed, whereby the mold assembly 12 and the mold assembly 32 are aligned. In FIG. 1, reference numeral 82 denotes a guide bush hole for attaching the guide bush 81. In the present embodiment, a guide post is disposed in the mold assembly 12 and a guide bush 81 is disposed in the mold assembly 32. However, the guide post is disposed in the mold assembly 32 and the mold. A guide bush 81 can be disposed on the assembly 12.

  Further, when the cut punch 48 is advanced by driving the cut punch cylinder in the cooling step, the front end of the cut punch 48 enters the die 28 and punches the resin in the cavity space C. It can be carried out.

  In the injection molding machine having the above-described configuration, in the injection device, the screw is rotated in the metering step, the resin is melted and stored in front of the screw, and the screw is retracted accordingly. The mold device is closed and clamped. Subsequently, in the injection step, the screw is advanced, and the resin stored in front of the screw is injected from the injection nozzle and filled into the cavity space C. Then, in the cooling step, the resin in the cavity space C is cooled, drilled, and a disk substrate is formed. Subsequently, mold opening is performed, and the disk substrate is taken out.

  By the way, in the injection process, the resin passes through the sprue 26, enters the cavity space C through the gate, and flows in the cavity space C radially outward. A temperature gradient is formed in C, and the temperature of the resin is higher as it is closer to the gate and lower as it is closer to the outer periphery. As a result, the transferability of the stamper pattern is higher as it is closer to the gate and lower as it is closer to the outer periphery.

  Therefore, in order to suppress the formation of a temperature gradient in the cavity space C, the mirror surface plates 16 and 36 are cooled to a predetermined temperature. However, only the mirror surface plates 16 and 36 are cooled. When the base plate 15 that supports the mirror plate 16 and the intermediate plate 40 that supports the mirror plate 36 are not cooled, the pitch between the guide posts and the guide bushes 81 is generated due to thermal expansion. 81 is not parallel, and the alignment accuracy between the mold assembly 12 and the mold assembly 32 is lowered.

  Therefore, over the mirror plates 16 and 36, the base plate 15 and the intermediate plate 40, water, oil, air, gas, etc. as a third temperature adjusting medium, in this embodiment, the first, The second flow paths 61 and 62 are formed, and water is supplied to the first and second flow paths 61 and 62 from the medium supply source, so that not only the mirror plates 16 and 36 but also the base plate 15 and the intermediate plate 40. It is designed to cool together.

  The first flow path 61 is a predetermined portion of the base plate 15, in this embodiment, a side surface S 1 positioned below (leftward in FIG. 2) when the disk molding die is attached to the injection molding machine. A medium inlet (not shown) opened to the side S1, a medium outlet (not shown) opened adjacent to the medium inlet, mainly formed in the base plate 15 for cooling the base plate 15, the medium inlet and An auxiliary cooling unit (not shown) on the medium inlet side and the medium outlet side connected to the medium outlet, and a main cooling unit formed in a predetermined pattern between the mirror plate 16 and the base plate 15 mainly for cooling the mirror plate 16 67, and a medium inlet side and a medium outlet side (not shown) connecting the auxiliary cooling units and the main cooling unit 67. The main cooling portion 67 is formed by covering a groove (not shown) opened on the rear end surface (upper end surface in FIG. 2) of the mirror surface plate 16 with the base plate 15 and constitutes one continuous closed flow path.

  Similarly, the second flow path 62 has a medium inlet 72 opened at a predetermined portion of the intermediate plate 40, for example, a side surface S11 located below when a disk molding die is attached to the injection molding machine. A medium outlet 73 opened on the side surface S11 adjacent to the medium inlet 72, mainly formed in the intermediate plate 40 for cooling the intermediate plate 40, and connected to the medium inlet 72 and the medium outlet 73. The auxiliary cooling portions 74 and 75 on the medium inlet 72 side and the medium outlet 73 side, and the main cooling portion formed in a predetermined pattern between the mirror surface plate 36 and the intermediate plate 40 in order to mainly cool the mirror surface plate 36. 77, and connection portions 78 and 79 on the medium inlet 72 side and the medium outlet 73 side connecting the auxiliary cooling portions 74 and 75 and the main cooling portion 77, respectively. The main cooling part 77 is formed by covering a groove opened on the rear end face (the lower end face in FIG. 2) of the specular disc 36 with the intermediate plate 40, and constitutes a continuous closed flow path.

  Next, the auxiliary cooling units 74 and 75 will be described. Since the auxiliary cooling part formed in the base plate 15 has the same structure as the auxiliary cooling parts 74 and 75, description thereof is omitted.

  As shown in FIG. 1, the auxiliary cooling portions 74 and 75 are formed so as to surround the main cooling portion 77 radially outward of the main cooling portion 77, and from the medium inlet 72 and the medium outlet 73 to the intermediate plate 40. The flow path portions h1 and h2 extending linearly in parallel with each other toward the inward side, the side surface S12 on the back side (non-operation side) and the front side (operation side) at right angles from the tips of the flow path portions h1 and h2. ) Along the side edge of the intermediate plate 40 at right angles from the tips of the flow path portions h3, h4 and the flow path portions h3, h4 extending linearly toward the side surface S13 and adjacent to the guide bushing hole 82. The flow path portions h5 and h6 extending linearly in parallel with each other toward the upper side S14 (right side in FIG. 1), at right angles from the tips of the flow path portions h5 and h6, in a direction approaching each other, and Flow extending linearly adjacent to the guide bushing hole 82 Part h7, h8, and at a right angle from the distal end of the flow path portion h7, h8, toward the connecting portion 78 and 79 includes a flow path unit h9, h10 extending straight in parallel with each other.

  The main cooling section 77 is concentrically formed over a predetermined angle θ from the center of the intermediate plate 40 to the outer side in the radial direction, that is, arc sections k1 to k4, arc sections k1 and k2. A straight line portion k5 connecting the circular arc portions k2 and k3, and a straight line portion k7 connecting the circular arc portions k3 and k4. The connecting portion 78 is connected to the circular arc portion k1 and the connecting portion is connected to the circular arc portion k4. 79 is connected. The main cooling portion 67 formed in the mirror surface plate 16 is also composed of arc portions m1 to m3 and straight portions not shown in the same manner as the main cooling portion 77, but the number of arc portions m1 to m3 is three. The number of straight portions is two.

  Therefore, the water supplied into the intermediate plate 40 through the medium inlet 72 flows through the auxiliary cooling unit 74, then moves into the mirror surface plate 36, flows through the second flow path 62, and then again in the intermediate state. It moves into the plate 40, flows through the auxiliary cooling unit 75, and is discharged from the medium outlet 73.

  As described above, the auxiliary cooling portions 74 and 75 are formed in the mold assembly 32, and the water cools the intermediate plate 40 and the base plate 35 while flowing through the auxiliary cooling portions 74 and 75. In addition, since the auxiliary cooling part is formed and the water cools the base plate 15 while flowing through the auxiliary cooling part, it is possible to sufficiently prevent the pitch deviation between the guide post and the guide bush 81 due to thermal expansion. Therefore, each guide post and the guide bush 81 are parallel to each other, and the alignment accuracy between the mold assembly 12 and the mold assembly 32 can be increased.

  Further, since no flow path is formed in the first and second outer peripheral rings 19 and 38, the piping work can be simplified and the cost of the mold apparatus can be reduced.

  In the mold assembly 32, the flow path parts h 3, h 4, h 7, and h 8 are formed between the main cooling part 77 and the guide bush 81 at a position radially outward from the outermost peripheral edge part of the main cooling part 77. Since it is formed in between, the portion of the intermediate plate 40 to which the guide bush 81 is attached can be sufficiently cooled. Similarly, in the mold assembly 12, the respective flow path portions corresponding to the flow path portions h 3, h 4, h 7, h 8 are arranged on the main cooling portion at the radially outer side from the outermost peripheral edge portion of the main cooling portion 67. Since it is formed between 67 and the guide post, the portion of the base plate 15 to which the guide post is attached can be sufficiently cooled.

  Therefore, the alignment accuracy between the mold assembly 12 and the mold assembly 32 can be further increased.

  By the way, since the vicinity of the outer peripheral edge of the cavity space C is in the vicinity of the outer peripheral edge of the mold apparatus, the amount of heat radiated to the outside of the mold apparatus is large and the mold apparatus becomes too cold.

  Therefore, in the present embodiment, in order to prevent the resin from being excessively cooled in the vicinity of the outer peripheral edge of the stamper in the mirror surface plate 16, in the present embodiment, outside the stamper A closed chamber 63 as an annular heat insulating portion is formed on the peripheral line, and the closed chamber 63 is filled with air. Similar to the main cooling portion 67, the closed chamber 63 is formed by covering a groove that opens at the rear end surface of the specular disc 16 with the base plate 15, and is deeper than the main cooling portion 67.

  Further, since the closed chamber 63 has a heat insulating property when it is filled with air, it is prevented that heat radially inward from the closed chamber 63 is transmitted outward in the radial direction. Accordingly, the cooling capacity of the first flow path 61 is made lower than the cooling capacity of the second flow path 62, so that on the stamper side, the amount of heat radiated from the outer peripheral edge of the mirror surface plate 16 to the outside of the mold apparatus is reduced. Further, it is possible to prevent the vicinity of the outer peripheral edge of the mirror surface board 16 from being excessively cooled. As a result, it is possible to prevent the transferability from being locally lowered in the vicinity of the outer peripheral edge of the cavity space C, and to improve the transferability of a fine pattern over the entire cavity space C. Therefore, the quality of the disk substrate can be improved.

  Further, since the closed chamber 63 is deeper than the main cooling part 67, the amount of heat radiated from the outer peripheral edge of the mirror surface plate 16 to the outside of the mold apparatus is further reduced, and the vicinity of the outer peripheral edge of the mirror surface plate 16 is cooled too much. It can be surely prevented.

  In the present embodiment, the closed chamber 63 filled with air is formed as the heat insulating portion, but a vacuum closed chamber may be formed instead of the closed chamber 63. In addition, the closed chamber 63 can be filled with a highly heat-insulating material, that is, a heat insulating material.

  In the present embodiment, the closed chamber 63 has an annular shape, but a plurality of closed chambers having an arcuate shape can be formed in the circumferential direction of the mirror surface plate 16. Furthermore, in the present embodiment, the closed chamber 63 is formed in the mirror surface board 16, but can be formed in the mirror surface board 36, or can be formed in the mirror surface board 16 and the mirror surface board 36. .

  The depth of the groove forming the main cooling portion 67 (distance from the opening portion to the bottom portion) is set as shown by the solid line in FIGS. 2 and 3, and the arc portion m2 is the arc portion m1. The cooling capacity in the vicinity of the inner stamper holder 14 and in the vicinity of the closed chamber 63 is made lower than the cooling capacity in the vicinity of the main cooling portion 67.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

It is a front view which shows the principal part of the mold assembly of the movable side in embodiment of this invention. It is sectional drawing which shows the principal part of the metal mold | die apparatus in embodiment of this invention. It is an enlarged view which shows the principal part of the metal mold | die apparatus in embodiment of this invention.

Explanation of symbols

15, 35 Base plate 16, 36 Mirror plate 40 Intermediate plate 61, 62 First and second flow paths 67, 77 Main cooling part 72 Medium inlet 73 Medium outlet 74, 75 Auxiliary cooling part 78, 79 Connection part 81 Guide bush C Cavity spaces h1 to h10

Claims (8)

(A) a first mold member;
(B) a first plate-like member attached to the first mold member;
(C) a second mold member disposed to be movable forward and backward with respect to the first mold member;
(D) A second plate that is attached to the second mold member, is disposed to face the first plate member, and forms a cavity space with the first plate member during mold clamping. A member,
(E) a guide bush attached to one of the first and second mold members;
(F) a guide post that is attached to the other of the first and second mold members and is inserted into and removed from the guide bush as the second mold member advances and retreats;
(G) A mold apparatus in which flow paths for flowing a temperature control medium are formed in the first and second plate-shaped members and in the first and second mold members. (A) Each flow path comprises a main cooling part in the first and second plate-like members, and an auxiliary cooling part in the first and second mold members,
(B) The mold apparatus according to claim 1, wherein each of the auxiliary cooling sections is formed radially outward from the main cooling section. Each said auxiliary | assistant cooling part is a metal mold | die apparatus of Claim 2 provided with the flow-path part formed between the said guide bush and guide post, and the main cooling part.   The mold apparatus according to claim 2, wherein each main cooling unit and each auxiliary cooling unit are connected via a connection unit.   The medium is sent from the medium inlet to the auxiliary cooling part on the medium inlet side, sent to the main cooling part via the connection part on the medium inlet side, and sent from the main cooling part to the auxiliary cooling part on the medium outlet side. The mold apparatus according to claim 3, wherein the mold apparatus is discharged from the medium outlet after being sent to the auxiliary cooling unit on the outlet side. A first mold member, a first plate member attached to the first mold member, a second mold member disposed so as to be movable back and forth with respect to the first mold member, and the second mold A second disk-shaped member attached to the member, disposed opposite to the first disk-shaped member, and forming a cavity space with the first disk-shaped member during mold clamping; A guide bush attached to one of the two mold members, and a guide post attached to the other of the first and second mold members and fitted into the guide bush when the mold is closed, In a molded product molded by a mold apparatus in which a flow path for flowing a temperature control medium is formed in the first and second plate-shaped members and in the first and second mold members,
(A) filling the cavity space with the molding material through the sprue,
(B) cooling the molding material to form a prototype of the molded product;
(C) A molded product formed by advancing a processed member and performing a predetermined process on the original mold of the molded product. A first mold member, a first plate member attached to the first mold member, a second mold member disposed so as to be movable back and forth with respect to the first mold member, and the second mold A second disk-shaped member attached to the member, disposed opposite to the first disk-shaped member, and forming a cavity space with the first disk-shaped member during mold clamping; A guide bush attached to one of the two mold members, and a guide post attached to the other of the first and second mold members and fitted into the guide bush when the mold is closed, Molding of a molded product by molding a molded product with a mold apparatus in which a flow path for flowing a temperature control medium is formed in the first and second plate-shaped members and in the first and second mold members. In the method
(A) filling the cavity space with the molding material through the sprue,
(B) cooling the molding material to form a prototype of the molded product;
(C) A method of forming a molded product, wherein the molded product is molded by advancing a processed member and performing predetermined processing on the original mold of the molded product. The molding machine provided with the metal mold | die apparatus of any one of Claims 1-5.

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