KR100783651B1 - Mold apparatus, molded product, method of molding the same, molding machine and bush - Google Patents

Abstract

An object of the present invention is to provide a mold apparatus capable of preventing the inclination of the processing member from occurring and improving the quality of the molded article.

Sprue bushes provided with a first mold unit, a second mold unit, and one of the first and second mold units, and having a sprue 26 for filling the cavity space C with the molding material ( 24) and a processing member which is provided so as to be able to move forward and backward in the other of the first and second mold units, and which is subjected to a predetermined processing on a prototype of a molded article, and a radially outer side of the processing member. And a bushing 47 provided with a processing member and formed with a flow path 55 for flowing a medium for temperature control in the vicinity of the tip.

Since the flow path 55 for flowing the temperature control medium is formed in the vicinity of the tip of the bush 47, it is unnecessary to form the temperature control flow path in the vicinity of the tip of the processing member. Therefore, since the support member can be provided near the tip end of the bush 27, the inclination of the processing member can be prevented from occurring.

Description

Mold apparatus, molded product, molding method, molding machine and bush {Mold apparatus, molded product, method of molding the same, molding machine and bush}

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

Conventionally, in a molding machine for molding a disk substrate as a molded article, for example, an injection molding machine, a resin melted in a heating cylinder is filled into a cavity space in a disk molding die, and the resin is cooled and solidified in the cavity space. I am trying to get a disc board.

Therefore, the injection molding machine includes a disk molding mold as a mold apparatus comprising a fixed mold assembly and a movable mold assembly, an injection apparatus for filling the cavity space with the resin, and the movable side as well. And a clamping device for detaching the mold assembly from the mold assembly on the fixed side. The mold assembly on the movable side is pushed back and forth by this mold clamping device, thereby closing, clamping and opening the mold for disk forming, and during molding, the mirror surface of the mold assembly on the fixed side is clamped. A cavity space is formed between the half and the mirror surface of the mold assembly on the movable side.

In addition, the injection apparatus includes a heating cylinder, an injection nozzle attached to the tip of the heating cylinder, and a screw provided in the heating cylinder to be rotatable and retractable.

Thus, in the metering step, the screw is rotated, the resin is melted and accumulated in front of the screw, whereby the screw is retracted, and the mold closing and the shaping of the mold for forming the disk are performed therebetween. Subsequently, in the injection process, the screw is advanced, the resin accumulated in front of the screw is injected from the injection nozzle, and filled in the cavity space. In the cooling step, the resin in the cavity space is cooled and punched out to form a disk substrate. Subsequently, mold opening is performed, and the disk substrate is taken out.

Here, a stamper is mounted on the mirror surface side of the fixed side, and as the resin is filled into the cavity space, a fine pattern, which is a pit formed on the stamper, is transferred to the resin, and the information surface of the disc substrate is transferred. Forming irregularities to constitute.

In the mold assembly on the fixed side, a sprue is formed in the sprue bush, and the tip of the sprue constitutes a gate serving as an inlet of the resin filled in the cavity space, and the resin is gated through the sprue. It enters into a cavity space through and flows inside a cavity space toward radially outward. Further, a die formed of a recess is formed at the tip of the sprue bush.

On the other hand, in the mold assembly on the movable side, a cut punch as a processing member is provided so as to be able to move back and forth, and the above punch processing can be performed by advancing and cutting the cut punch and entering the tip into the die.

By the way, since the resin which entered the cavity space through the gate contacts the tip of the cut punch for the first time, it is easily heated to increase the temperature. As the temperature of the cut punch changes, when the dimension changes, the punching of the disk substrate becomes unstable, and the quality of the disk substrate is deteriorated.

Therefore, a temperature adjusting flow path is formed near the tip of the cut punch, and the temperature adjusting medium flows through the flow path to cool the cut punch. However, when the flow path is formed, it is necessary to increase the diameter in the vicinity of the tip end of the cut punch, so that the machining of the cut punch becomes more complicated.

In addition, a floating punch for taking out the disk substrate is provided on the outer side in the radial direction than the cut punch, and the cut punch is supported by the bearing so as to be able to move forward and backward with respect to the floating punch. As described above, when the flow path is formed, the diameter of the vicinity of the tip of the cut punch becomes large, so that a bearing cannot be provided near the tip of the cut punch. Will be installed.

By the way, since a bearing is provided with a some ball and supports each said cut punch by each ball, even if it makes the fit between a floating punch and a cut punch tight in the part in which a bearing is arrange | positioned, it is cut. While the punch can be easily retracted, in the vicinity of the distal end of the cut punch without bearings, the cut punch cannot be easily retracted if the fit between the floating punch and the cut punch is tightened. Therefore, in the vicinity of the front end of the cut punch, the fitting between the floating punch and the cut punch is loose, so that the cut punch is inclined and the quality of the disc substrate is degraded.

The present invention provides a mold apparatus, a molded article, a molding method thereof, and a molding machine which can solve the problems of the conventional mold for forming a disk, prevent the inclination of the processing member from occurring, and improve the quality of the molded article. For the purpose of

To this end, in the mold apparatus of the present invention, a first mold unit, a second mold unit, and one of the first and second mold units are provided, and a sprue for filling a cavity space with a molding material is provided. A sprue bush and a processing member which is provided so as to be able to move forward and backward in the other of the first and second mold units, and which advances, and which performs a predetermined processing on a prototype of a molded article, and a radial direction than the processing member On the outer side, the processing member is provided to surround the bush, and near the distal end, there is a bush in which a flow path for flowing the medium for controlling temperature is formed.

In this case, a bush is provided in the radially outer side of the processing member, and a flow path for flowing the temperature control medium is formed in the vicinity of the tip of the bush so that the temperature control medium flows in the vicinity of the tip of the processing member. There is no need to form a. Therefore, it is not necessary to increase the diameter near the tip of the processing member, and the processing of the processing member can be simplified. As a result, the cost of a mold apparatus can be made low.

In addition, since the supporting member can be provided near the tip of the bush, the fitting between the bush and the processing member can be tightened. Therefore, the inclination of the processing member can be prevented from occurring, and eccentricity can be prevented from occurring in the molded article. As a result, the quality of the molded article can be improved.

In another mold apparatus of the present invention, further, a ring-shaped flow passage for flowing a temperature control medium is formed near the tip of the sprue bush.

In this case, since a ring-shaped flow path is formed near the tip of the sprue bush, the tip of the processing member can be cooled when the processing member is advanced.

In still another mold apparatus of the present invention, the radial dimension of the flow path in the sprue bush is larger than the inner diameter of the supply path for supplying the temperature control medium to the flow path in the sprue bush.

In this case, a sufficient amount of the temperature control medium can flow in the flow path in the sprue bush, and the heat capacity of the medium in the flow path can be increased, so that the cooling capacity of the sprue bush by the medium can be increased. When the processing member is advanced, the tip of the processing member can be sufficiently cooled.

In still another mold apparatus of the present invention, the flow passage formed near the tip of the bush is a ring-shaped flow passage.

In another mold apparatus of the present invention, a support member is further provided between the processing member and the bush. And this support member is provided so that it may extend rearward at the position near a flow path formed in the vicinity of the front-end | tip of the said bush.

In this case, since the support member is provided so as to extend rearward at a position close to the flow path formed near the tip of the bush, the fitting between the bush and the processing member can be tightly tightened almost all over the bush. have. Therefore, the inclination of the processing member can be prevented from occurring, and eccentricity can be prevented from occurring in the molded article. As a result, the quality of the molded article can be improved.

In still another mold apparatus of the present invention, a supply passage for supplying a temperature control medium to the flow passage in the bush is formed along the support member.

In this case, since the supply path for supplying the medium for temperature regulation to the flow path in the bush is formed along the support member, the support member can be sufficiently cooled by the medium. Therefore, the operation of the supporting member can be stabilized.

In another mold apparatus of the present invention, further, a discharge path for discharging a lubricant for lubricating the support member is formed in the processing member.

In this case, since the discharge path for discharging the lubricant for lubricating the support member is formed in the processing member, the lubricant does not adhere to the molded article.

In the molded article of this invention, it is provided in one of a 1st mold unit, a 2nd mold unit, and said 1st, 2nd mold unit, The sprue bush provided with a sprue, The other of the said 1st, 2nd mold units And a processing member provided so as to be able to move forward and backward, and formed by surrounding the processing member in a radially outer side of the processing member and having a bush formed in the vicinity of the distal end with a flow passage for flowing the temperature control medium. have.

Then, a molding material is filled into the cavity space through the sprue, the molding material is cooled to form a prototype of the molded article, the processing member is advanced, and predetermined processing is performed on the prototype of the molded article. By molding.

In the molding method of the molded article of this invention, it is provided in one of a 1st mold unit, a 2nd mold unit, and the said 1st, 2nd mold unit, and the sprue bush provided with a sprue, said 1st, 2nd mold Applied to a mold apparatus having a processing member installed to be able to move forward and backward on the other side of the unit, and a bush formed in a radially outer side of the processing member so as to surround the processing member, and a flow path for flowing a temperature regulating medium near the distal end. It is supposed to be.

Then, a molding material is filled into the cavity space through the sprue, the molding material is cooled to form a prototype of the molded article, the processing member is advanced, and predetermined processing is performed on the prototype of the molded article. The molded article is thereby molded.

In the molding machine of this invention, the die apparatus of any one of Claims 1-7 is provided.

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing which shows the principal part of the disk shaping | molding die in embodiment of this invention.

Fig. 2 is a front view showing the main portion of the mold assembly on the movable side in the embodiment of the present invention;

It is an enlarged view which shows the principal part of the disk shaping | molding die in embodiment of this invention.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail, referring drawings. In this case, however, the mold for disk forming as a mold apparatus will be described.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view showing a main portion of a disk molding die in an embodiment of the present invention, Fig. 2 is a front view showing a main portion of a mold assembly on a movable side in an embodiment of the present invention. It is an enlarged view which shows the principal part of the metal mold | die for disk shaping | molding in embodiment.

In the drawing, reference numeral 12 denotes a mold assembly on the fixed side, which is mounted on a fixing platen (not shown) through a mounting plate (not shown) by a bolt (not shown), and the mold assembly (12) serves as a first support member. The base plate 15 in the base plate 15, the mirror surface plate 16 as a first half-shaped member attached to the base plate 15 by a bolt b1, and the base plate 15. A sprue bush 24 positioned relative to and mounted by bolt b2. The first mold unit is configured by the base plate 15 and the mirror surface plate 16.

At the front end (lower part in FIG. 1) of the sprue bush 24, the die 28 made of a concave portion facing the cavity space C is the rear end of the sprue bush 24 (upper end in FIG. 1). ), A nozzle touch portion 29 made of a recess for contacting the injection nozzle of the injection apparatus (not shown) is formed. And from the front end to the rear end of the sprue bush 24, the sprue for further communicating with the die 28 and the nozzle touch portion 29 to pass the resin as a molding material injected from the injection nozzle. 26 is formed. The distal end of the sprue 26 constitutes a gate serving as an inlet for the resin filled in the cavity space C.

Further, in the vicinity of the tip of the sprue bush 24, a first temperature control medium such as water, oil, air, and gas, and in this embodiment, a ring-shaped flow path 27 for flowing water is formed. In this flow path 27, water is supplied from the medium supply source (not shown) through the supply path 30, whereby the front end of the sprue bush 24 (lower end in FIG. 1) is cooled to a predetermined temperature. The inner stamper holder 14, which is provided on the radially outer side of the first half of the sprue bush 24 (lower half in Fig. 1), is pressed against the inner circumference of the stamper (not shown) and cooled. The inner stamper holder 14 is detachably attached to the base plate 15 by rotating the rod 25 provided to be rotatable about the rear end.

The injection apparatus includes a heating cylinder, an injection nozzle attached to the tip of the heating cylinder, a screw rotatably and retractable in the heating cylinder.

Then, the stamper is detachably mounted to the mirror surface plate 16. As the resin is filled into the cavity space C, a fine pattern of a pit formed on the stamper is transferred to the resin to form a molded article. The unevenness forming the information surface of the disk substrate is formed.

In addition, a ring-shaped protruding contact ring 18 is attached to the base plate 15 by a bolt b3 around the outer circumference of the mirror surface plate 16, and the mirror surface plate 16 and the protrusion contact ring 18 are mounted. A ring-shaped first outer circumferential ring 19 is mounted to the base plate 15 by a bolt b4 on a radially outer side.

On the other hand, 32 is a mold assembly on the movable side mounted by a bolt not shown on the movable platen (not shown), and the mold assembly 32 moves forward and backward as the movable platen moves forward and backward (Fig. 1). To be removed from the mold assembly 12.

The mold assembly 32 includes a base plate 35, an intermediate plate 40 attached to the base plate 35 by bolts b5, and a bolt b6 attached to the intermediate plate 40. A mirror surface plate 36 as a second half-shaped member, a cylindrical bush 47 installed in the intermediate plate 40 and attached to the intermediate plate 40 by a bolt b7, and a ring in the bush 47. Cut punch 48 as a cylindrical processing member provided to be moved forward and backward by a support member having a shape and a bearing 49 as a linear bearing portion, and a rod-shaped protruding pin 50 provided to be able to move back and forth in the cut punch 48. And a cut punch block 52 provided in the base plate 35, a cut punch block 52 provided in the base plate 35, penetrating the cut punch block 52, and slidable with respect to the cut punch block 52. And a provided protruding rod 53. Thus, a second support member is formed by the base plate 35 and the intermediate plate 40, and a second mold unit is formed by the base plate 35, the intermediate plate 40, and the mirror surface plate 36.

In addition, in this embodiment, although the stamper is attached to the mirror surface board 16, it is also possible to attach a stamper to the mirror surface board 36. FIG. Furthermore, in this embodiment, the inner stamper holder 14, the mirror surface plate 16, the sprue bush 24, etc. are provided in the metal mold | die assembly 12, and the base plate 35, The mirror plate 36, the intermediate plate 40, the bush 47, the cut punch 48, and the like are provided, but the mold assembly 12 has a base plate 35, a mirror plate 36, an intermediate plate ( 40), bush 47, cut punch 48, etc. may be provided, and inner stamper holder 14, mirror face plate 16, sprue bush 24, etc., may be installed in mold assembly 32. FIG. .

The bush 47 surrounds the cut punch 48 and is installed with the tip (top end in FIG. 1) facing the cavity space C, and penetrates the mirror surface plate 36 to the rear (FIG. 1). Extending downward, and is attached to the intermediate plate 40 by the bolt b7 at the flange portion f1 at the rear end (lower end in FIG. 1). A slight clearance CL is formed between the outer circumferential surface of the bush 47, the mirror surface 36, and the inner circumferential surface of the intermediate plate 40, and compressed air is supplied to the clearance CL. Is injected into the cavity space C in the air blower slit SL formed between the outer circumferential surface of the bush 47 and the inner circumferential surface of the mirror surface plate 36 at the tip of the mold assembly 32.

In addition, the cut punch 48 is disposed with the front end facing the cavity space C, extends rearward through the mirror surface plate 36 and the intermediate plate 40, and at the rear flange portion f2. The cut punch block 52 is in contact with the cut punch block 52. Accordingly, by driving the cut punch cylinder as the cut punch drive unit (not shown), the cut punch block 52 can be advanced to advance and the cut punch 48 can be advanced. The front end of the cut punch 48 has a shape corresponding to the shape of the die 28. The front end of the cut punch 48 is advanced by moving the cut punch 48 forward (moving upward in FIG. 1). 28) can be entered.

In addition, in the vicinity of the tip of the bush 47, a second temperature adjusting medium such as air or gas, and in this embodiment, a ring-shaped flow path 55 for flowing air surrounds the cut punch 48. And the bush 47 is cooled by supplying air to the flow path 55 from a medium supply source (not shown), and the tip portion (the upper end in FIG. 1) of the cut punch 48 is brought to a predetermined temperature. Is cooled. For reference, it is also possible to use water, oil, or the like as the second temperature control medium.

The protruding pin 50 is installed with the tip facing the cavity space C, and extends rearward through the mirror surface 36 and the intermediate plate 40, and the protruding rod 53 at the rear end. ). Therefore, by driving the protruding cylinder as the protruding drive unit (not shown), the protruding rod 53 can be advanced and the protruding pin 50 can be advanced. Then, between the cut punch 48 and the protruding pin 50, a spring 54 as a biasing member is provided so as to extend in the axial direction, and the protruding pin 50 is urged toward the rear with a predetermined biasing force. do.

In addition, in the outer circumferential portion of the mirror surface plate 36, a ring shaped caviar ring 37 is provided so as to be movable with respect to the mirror surface plate 36 and to face the projecting contact ring 18. The ring-shaped second outer circumferential ring 38 faces the first outer circumferential ring 19 in the radially outer side than the mirror surface plate 36 and the caviar ring 37 so that the intermediate plate 40 is formed by the bolt b9. Is mounted on. The second outer circumferential ring 38 also functions as the caviar ring detent and is fixed to be hung around the outer circumference of the caviar ring 37.

In addition, a guide rod 41 is mounted to the caviar ring 37 toward the rear side, and the guide rod 41 is retracted along a guide hole formed in the intermediate plate 40 to thereby retract the caviar ring 37. You can move forward. The caviar ring 37 protrudes from the front end face (the upper end face in FIG. 1) of the mirror surface 36, and the outer circumference of the disc substrate is formed by the inner circumferential surface of the caviar ring 37.

In the vicinity of the front end surface of the caviar ring 37, a plurality of gas removal micropores 64 are formed radially and at the same pitch angle. In addition, a plurality of tip surfaces (lower surfaces in FIG. 1) in the first outer circumferential ring 19 (shown on the front end surfaces in the second outer circumferential ring 38 in FIG. 2 for convenience) are provided. The gas removal grooves 65 are formed radially and at the same pitch angle so as to communicate with the respective micropores 64. Thus, the first gas passage is formed by the fine holes 64 and the second gas passage is formed by the grooves 65.

By the way, the mold for forming the disk is constituted by the mold assemblies 12 and 32, and a mold clamping device (not shown) is installed to detach the mold assembly 32 from the mold assembly 12. By driving the mold cylinder as the mold driving part of the mold clamping device and advancing and retracting the mold assembly 32, mold closing, mold clamping and mold opening of the disk molding die can be carried out. Cavity space (C) is formed between the (). In this case, in order to perform mold closing and opening smoothly, the guide rod which is not shown in the predetermined place of the base plate 15 protrudes toward the metal mold | die assembly 32, and is mounted, and the intermediate plate 40 and the base plate 35 are carried out. The guide bush 81 is provided at a position corresponding to the guide rod in the above), and the guide rod is inserted into and removed from the guide bush 81 as the mold assembly 32 moves forward and backward. In addition, in FIG. 2, 82 is a guide bush hole for attaching the guide bush 81. As shown in FIG.

In the cooling step, when the cut punch 48 is advanced by driving the cut punch cylinder, the tip of the cut punch 48 enters the die 28 to be processed into the resin in the cavity space C. In this embodiment, punching can be performed. Thus, the circular shape of the disk substrate, that is, the substrate circular shape, is formed by the resin in the cavity space C.

By the mirror surfaces 16 and 36, the base plate 15, and the intermediate plate 40, a third temperature control medium such as water, oil, air, and gas, and the agent for flowing water in the present embodiment. First and second flow passages 61 and 62 are formed, and water is supplied to the first and second flow passages 61 and 62 from the medium supply source, and the mirror surfaces 16 and 36 are cooled to a predetermined temperature.

The first flow path 61 is a media inlet (not shown) opened at a predetermined place of the base plate 15, for example, the side surface S1 located below when the mold apparatus is mounted in the injection molding machine. At S1), an unshown media outlet opened adjacent to the media inlet, mainly an inside of the unshown inlet formed in the base plate 15 for cooling the base plate 15, and connected to the media inlet and the media outlet. Side and outlet side auxiliary cooling units, mainly for cooling the mirror surface plate 16, the main cooling portion 67 formed in a predetermined pattern between the mirror surface plate 16 and the base plate 15, and the respective auxiliary cooling portion and The inlet side and the outlet side connection part which connects the main cooling part 67 is provided. The said main cooling part 67 is formed by covering the groove | channel which opens in the surface of the side which contacts the base plate 15 in the mirror surface board 16 with the base plate 15, and it is one continuous It constitutes a closed flow path.

Similarly, the second flow path 62 is a medium inlet 72 opened in a predetermined place of the intermediate plate 40, for example, the side surface S11 located below when the disk molding die is mounted in the injection molding machine. And formed in the intermediate plate 40 to cool the media outlet 73, mainly the intermediate plate 40, which is opened adjacent to the media inlet 72 at the side surface S11, and the media inlet 72. And a predetermined pattern between the mirror surface plate 36 and the intermediate plate 40 to cool the auxiliary cooling portions 74 and 75, mainly the mirror surface plate 36, on the inlet side and the outlet side connected to the media outlet 73. The main cooling part 77 formed, and the connection parts 78 and 79 of the inlet side and the outlet side which connect each said auxiliary cooling part 74 and 75 and the main cooling part 77 are provided. The said main cooling part 77 is formed by covering the groove | channel which opens in the surface of the side which contacts the intermediate plate 40 in the mirror surface board 36 with the intermediate plate 40, and it is one continuous It constitutes a closed flow path.

The auxiliary cooling units 74 and 75 are formed so as to surround the main cooling unit 77 at the radially outer side of the main cooling unit 77, and the intermediate plate (from the media inlet 72 and the media outlet 73). Towards the inside of 40, the flow path portions h1 and h2 extending in a straight line parallel to each other, the side surface S12 and the front surface of the back side (non-operation side) at right angles from the distal end of the flow passage portions h1 and h2. The flow path portions h3 and h4 extending in a straight line toward the side surface S13 on the side (operation side), along the lateral circumference of the intermediate plate 40 at a right angle from the distal end of the flow passage portions h3 and h4. Flow path portions h5 and h6 extending in a straight line parallel to each other toward the side surface S14 of the flow path portion h7, which extends in a direction perpendicular to each other at a right angle from the distal end of the flow path portions h5 and h6. h8) and flow path portions h9 and h10 extending in a straight line parallel to each other at right angles from the distal ends of the flow path portions h7 and h8 toward the connecting portions 78 and 79. Each auxiliary cooling part formed in the base plate 15 also has the same structure as the auxiliary cooling parts 74 and 75.

In addition, the said main cooling part 77 is the some part formed concentrically, ie arc part k1-k4 over the predetermined angle (theta) from the center of the intermediate plate 40 to radial direction outer side. ), A straight portion k5 connecting between the arc portions k1 and k2, a straight portion k6 connecting between the arc portions k2 and k3, and a straight portion connecting the arc portions k3 and k4. (k7), a connecting portion 78 is connected to the arc portion k1, and a connecting portion 79 is connected to the arc portion k4. And the main cooling part 67 formed in the mirror surface board 16 also consists of the part similar to the main cooling part 77, ie, the arc part which is not shown and the straight part which is not shown, The number of arc parts is three, , The number of straight portions is two.

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

Then, in the injection apparatus in the metering step, the screw is rotated, the resin is melted and accumulated in front of the screw, whereby the screw is retracted, and the mold closing and the mold of the disk forming die are performed therebetween. . Then, in the injection process, the screw is advanced, the resin accumulated in front of the screw is injected from the injection nozzle, and filled in the cavity space (C). In the cooling step, the resin in the cavity space C is cooled, and the punching is performed to form a disk substrate. Subsequently, mold opening is performed, and the disk substrate is taken out.

By the way, in the injection process, the resin enters the cavity space C through the sprue 26 through the gate and flows in the cavity space C toward the outside in the radial direction. A temperature gradient is formed in (C), and when the temperature of the resin is higher as it is closer to the gate, and lower as it is closer to the outer circumference, the transferability of the stamper pattern is higher as it is closer to the gate, The closer to, the lower.

Therefore, in the mirror surface panel 16 on the stamper side, in the present embodiment, at a predetermined place outside the first flow path 61 in the radial direction so that the resin is not cooled too much in the vicinity of the outer circumference. In this embodiment of the predetermined shape on the line around the outer periphery of the stamper, a closed chamber 63 as a ring-shaped heat insulating portion is formed, and air is filled in the closed chamber 63. Like the main cooling part 67, the said closed chamber 63 covers the groove | channel which opens in the surface of the side which contacts the base plate 15 in the mirror surface board 16 by the base plate 15. As shown in FIG. Is formed.

Moreover, since the said closed chamber 63 becomes heat insulating by filling with air, it is prevented that the heat inside radial direction is transmitted toward radially outer side rather than the closed chamber 63. As shown in FIG. Therefore, since the cooling capacity by the 1st flow path 61 of the mirror surface board 16 becomes lower than the cooling capacity by the 2nd flow path 62 of the mirror surface board 36, the mirror surface board 16 on the stamper side. It is possible to reduce the amount of heat radiated out of the disk forming die from the outer circumference of the mold, thereby preventing the mirror surface plate 16 from being cooled too much. As a result, the transferability can be prevented from being lowered locally in the vicinity of the outer circumference of the cavity space C, and the transferability of the fine pattern can be improved over the entire cavity space C. FIG. Thus, the quality of the disk substrate can be improved.

In addition, since the closing chamber 63 becomes deeper than the main cooling unit 67, the amount of heat radiated out of the disk forming die from the outer circumference of the mirror surface plate 16 is further reduced, and the mirror surface plate 16 is cooled too much. Can be prevented.

By the way, since the resin which entered the cavity space C for the first time contacts the front end of the said cut punch 48, it heats easily and temperature becomes high. As the temperature of the cut punch 48 changes, when the dimension changes, the drilling of the circular shape of the disc substrate becomes unstable, and the quality of the disc substrate is deteriorated.

Therefore, as described above, the temperature adjusting flow passage 55 is formed near the tip of the bush 47, and the air is supplied to the flow passage 55, thereby cooling the bush 47 and cutting punch ( In particular, the distal end of 48 is cooled to a predetermined temperature.

Therefore, the 1st supply path 101 is formed in the said intermediate plate 40, and the 2nd supply path 102 is formed in the cut punch 48, The air flows first, after the 1st supply path 101 flows. The second supply path 102 enters the second supply path 102 in the flange f1 of the cut punch 48, flows through the second supply path 102 along the cylindrical portion s1 of the cut punch 48, and flows through the flow path. Supplied to 55. The air supplied to this flow path 55 flows through the flow path 55, and is sent to the discharge path not shown in figure from the predetermined place in the circumferential direction, and discharged through this discharge path. And this discharge path is formed in the flange part f1 and the cylindrical part s1.

In this way, when the vicinity of the front end of the cut punch 48 is cooled through the bush 47 by the air flowing in the flow path 55, and the cut punch 48 enters the die 28, Since it cools sufficiently by the flow path 27 through the lu bush 24, the temperature of the cut punch 48 can be stabilized and the quality of a molded article can be improved.

And since there is no need to provide a temperature adjusting flow path in the vicinity of the tip of the cut punch 48, it is not necessary to increase the diameter in the vicinity of the tip of the cut punch 48, thereby simplifying the processing of the cut punch 48. You can do it. Therefore, the cost of a mold apparatus can be made low.

Since the temperature adjusting flow path is not formed in the vicinity of the front end of the cut punch 48, when the cut punch 48 is advanced for drilling, the vicinity of the front end of the cut punch 48 is bushed 47. It is located further ahead, and cooling by the flow path 55 is not performed.

Therefore, the dimension of the radial direction of the flow path 27 in the said sprue bush 24 is the supply path 105 which supplies a medium from the supply path 30 to the flow path 27 in the sprue bush 24. As shown in FIG. ) Is larger than the inner diameter of. Therefore, a sufficient amount of medium can flow in the flow path 27, and the heat capacity of the medium in the flow path 27 can be increased, so that the cooling capacity of the sprue bush 24 by the flow path 27 is increased. You can make it bigger. As a result, when the cut punch 48 is advanced, the tip of the cut punch 48 can be sufficiently cooled.

By the way, as mentioned above, the bush 47 is provided in the radially outer side rather than the cut punch 48, The said cut punch 48 is supported by the bearing 49 so that the bush 47 can be advanced and retracted. Although the diameter of the vicinity of the front end of the cut punch 48 can be made small, the bearing 49 is provided in the vicinity of the front end of the cut punch 48, and the front end and the bearing 49 of the cut punch 48 are provided. It can shorten the distance from the tip. In the present embodiment, the bearing 49 has its tip placed at a position adjacent to the flow path 55 formed in the bush 47 (slightly behind the position of the flow path 55) and extends toward the rear. The rear end is placed slightly ahead of the position of the front end of the flange portion f1 in the bush 47.

Therefore, the fitting between the bush 47 and the cut punch 48 can be tightened almost all over the bush 47, thereby preventing the inclination of the cut punch 48 from occurring. In this way, eccentricity can be prevented from occurring in the disk substrate. As a result, the quality of the disk substrate can be improved.

Moreover, since the said 2nd supply path 102 and the discharge path are formed in parallel with the bearing 49 and along the bearing 49, the bearing 49 can be fully cooled by air. Therefore, the dimension of each element, such as the ball 107 of the said bearing 49, can be prevented from changing, and the operation | movement of the bearing 49 can be stabilized.

And since the bearing 49 is arrange | positioned to the vicinity of each front-end | tip of the bush 47 and the cut punch 48, the grease which is not shown as a lubricant for lubricating the bearing 49 is carried out by the bush 47 and the cut punch ( It becomes easy to enter into cavity space C in the clearance gap with 48). Thus, a discharge path of grease is formed at the rear end of the cut punch 48, and the discharge path prevents the grease from entering the cavity space C in the gap between the bush 47 and the cut punch 48. I'm trying to. Therefore, since grease does not adhere to the disk substrate, the quality of the disk substrate can be improved.

By the way, in this embodiment, the cut punch 48 is directly supported with respect to the bush 47 by the bearing 49, and a floating punch is not provided between the cut punch 48 and the bush 47. FIG. Thus, the clearance CL is formed, and the air compressed in the clearance CL is supplied through the supply path 109, and the air is injected into the cavity space C from the slit SL.

In this case, the bush 47 does not need to advance the tip forward than the tip surface of the mirror surface 36 like a floating punch. Therefore, since the outer diameter of the front end of the bush 47 can be made smaller than that of the main body, the slit SL can be formed between the outer periphery of the front end of the cut punch 48. Can protrude smoothly.

In addition, since the heat capacity of the vicinity of the tip of the bush 47 can be reduced as the outer diameter near the tip of the bush 47 becomes small, the bush 47 can be reliably cooled by the air flowing through the flow path 55. There is a number. Therefore, the cooling ability of the cut punch 48 by the flow path 55 can be improved.

Furthermore, an end portion 113 is formed on the outer circumferential surface of the cut punch 48 so as to contact the rear end of the bearing 49, and the outer diameter in front of the end portion 113 is smaller than that of the end portion 113. On the inner circumferential surface of the cut punch 48, an end portion 114 is formed on the inner circumferential surface of the cut punch 48 so that the outer diameter of the rear side becomes large, and the inner diameter of the front is smaller than the end portion 114, and the end portion ( 114, the inner diameter of the rear side becomes larger. In this embodiment, the said bearing 49 can be provided near the front end side of the cut punch 48, and it can prevent that the bearing 49 and the spring 54 overlap in an axial direction. Therefore, since the strength of the cut punch 48 can be increased, the size of the cut punch 48 can be made smaller.

In the present embodiment, when the cut punch 48 is advanced as the punching operation is performed, the vicinity of the tip of the cut punch 48 is positioned in front of the bush 47, and the flow path 55 is disposed in the flow path 55. Although cooling by this process is not performed, when the protruding pin 50 is advanced as it is, it remains in the sprue 26, and it may be considered that the solidified sprue cannot be protruded smoothly. Thus, a spherical protrusion 111 is formed at the tip of the protruding pin 50, and the sprue can be smoothly projected by the protrusion 111.

In addition, this invention is not limited to the said embodiment, It is possible to make various changes based on the meaning of this invention, These things are not excluded from the scope of this invention.

This invention can be used for a disc substrate manufacturing apparatus for producing a disc substrate.

Claims (12)

(a) a first mold unit, (b) a second mold unit, (c) a sprue bush provided in one of the first and second mold units and having a sprue for filling the cavity space with a molding material; (d) a processing member which is provided so as to be able to move forward and backward in the other of the first and second mold units, and performs a predetermined processing on the original shape of the molded article as it is advanced; (e) having a bush provided on the outside of the processing member in the radial direction to surround the processing member, (f) a support member is disposed between the processing member and the bush, (g) The mold member, characterized in that the support member is installed so as to extend toward the rear in the vicinity of the front end of the processing member. The method according to claim 1, A mold apparatus in which a ring-shaped flow path for flowing a medium for controlling temperature is formed near the tip of the sprue bush. The method according to claim 2, The radial dimension of the flow path in the sprue bush is larger than the inner diameter of the supply path for supplying the temperature control medium to the flow path in the sprue bush. The method according to claim 1, A flow path formed near the tip of the bush is a ring-shaped flow path. The method according to claim 1, The support member, the mold apparatus is installed so as to extend toward the rear at a position close to the flow path formed near the tip of the bush. The method according to claim 5, A supply path for supplying a temperature control medium to the flow passage in the bush, is formed along the support member. The method according to claim 5, Mold apparatus is formed in the processing member, the discharge path for discharging the lubricant for lubricating the support member. delete A spruce bush provided with one of the first mold unit, the second mold unit, the first mold, and the second mold unit, the sprue bush having a sprue, and a processing member provided on the other of the first and second mold units so as to be retractable; And a bush provided to surround the processing member in a radially outer side of the processing member, and a support member is provided between the processing member and the bush, and the support member is rearward near the tip of the processing member. In the molding method of the molded article in the mold apparatus which is extended toward and installed, (a) filling a molding material in a cavity space through the sprue, (b) cooling the molding material to form a prototype of the molded article; (c) A molded article molding method, wherein the molded article is molded by advancing the processing member along the inner circumferential surface of the bush via the supporting member and performing a predetermined processing on the prototype of the molded article. The molding machine provided with the metal mold apparatus as described in any one of Claims 1-7. A sprue bush provided in one of the first mold unit, the second mold unit, the first mold, and the second mold unit, and having a sprue for filling the cavity space with the molding material; and the first and second molds. In the tubular bush of the mold for forming a disk having a processing member which is provided so as to be able to move forward and backward in the other unit and moves forward, a predetermined processing is performed on the prototype of the molded article. (a) enclosing the processing member at a radially outer side, and also including a supporting member which extends toward the rear in the vicinity of the tip of the processing member to support the processing member, (B) a bush characterized in that the discharge path for discharging the lubricant for lubricating the support member at the rear end of the processing member. The method according to claim 11, A bush characterized in that a flow path for flowing a temperature control medium in the vicinity of the tip is formed.

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