JP2010201866A - Metal mold device, heat insulating member and method of manufacturing metal mold device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin injection molding metal mold device having a heat insulation member and a method of manufacturing the same, easy in manufacture, and superior in durability, reducing friction between an adjacent member and itself. <P>SOLUTION: This heat insulation member of the metal mold device includes a plate part having a flat back face and a surface and a plurality of liner partition walls formed in parallel on the surface of the plate part. The respective partition walls have a first member having a parallel sidewall surface, a surface and a parallel top surface, a plate part having a flat back face and a surface and a plurality of liner partition walls formed in parallel on the surface of the plate part. The respective partition walls have the parallel sidewall surface, the surface and the parallel top surface, and have a second member forming a groove capable of inserting the partition wall of the first member. The first member and the second member are opposed with the back face on the outside, and the partition wall of the first member is inserted into the groove of the second member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat insulating member suitable for a resin injection molding apparatus and a manufacturing method thereof, and particularly relates to a heat insulating member suitable for a resin injection molding apparatus that is easy to manufacture and excellent in durability and a manufacturing method thereof.

  In resin molding of optical media such as light guide plates, optical films such as phase films, compact discs (CDs), digital versatile discs (DVDs), etc., there are extremely fine irregularities on a mold formed with a flat or curved surface. A resin molding method is widely employed in which a stamper is arranged, a thermoplastic resin such as polycarbonate is supplied or filled on the stamper, and the extremely fine uneven shape of the stamper is transferred to a resin molded product with high accuracy.

  Hereinafter, the injection molding method will be described. In the injection molding method, a resin heated and melted in a heating cylinder of a resin injection molding apparatus is filled into a cavity in a mold apparatus, and cooled and solidified in the cavity to form a molded product.

  The resin injection molding apparatus includes an injection apparatus, a mold apparatus as a resin molding apparatus, and a mold clamping apparatus. The injection device is provided with a heating cylinder that heats and melts the resin, an injection nozzle that is attached to the front end of the heating cylinder and injects the molten resin, and is rotatably and reciprocally disposed within the heating cylinder. Provide screws and the like. The mold apparatus has a fixed mold and a movable mold, and the mold mold is closed, clamped and opened by moving the movable mold back and forth with the mold clamping device. A cavity is formed between the mold and the movable mold.

  In the metering step, when the screw is rotated, the thermoplastic resin melted in the heating cylinder is stored in front of the screw, and the screw is retracted accordingly. During this time, the mold apparatus is closed and clamped. Subsequently, in the injection process, the screw is advanced, the resin stored in front of the screw is injected from the injection nozzle, and filled into the cavity in which the stamper is arranged. Next, in the cooling step, the resin in the cavity is cooled and solidified. Subsequently, the mold is opened and the molded product is taken out. In mass production, the same cycle is repeated. Here, since the molten resin flowing into the cavity is 300 ° C. to 400 ° C. and is lowered to hundreds of degrees Celsius when taken out, the stamper surface is exposed to a temperature cycle of hundreds of degrees Celsius or more.

  By the way, in recent years, there is an increasing demand for improving the productivity by shortening the cycle time, and in order to shorten the cycle time, the cooling time of the molten resin is shortened. For this reason, the temperature of the mold surface or stamper surface before coming into contact with the molten resin is set to be several tens of degrees C lower than the glass transition temperature of the thermoplastic resin to be used.

  However, when the molten resin flows into the cavity and comes into contact with the mold surface or the stamper surface, the resin surface is instantly cooled and a solidified layer (skin layer) is formed. If this skin layer is developed too much, transfer defects, weld lines and the like are caused.

  In addition, there is an increasing demand for transferring extremely fine shapes with high accuracy. One method of improving productivity by shortening the cycle time while maintaining high-precision transferability is to change the cooling water channel, but this approach has reached its limit.

  Japanese Patent No. 3066254 (Japanese Patent Laid-Open No. 7-178774) discloses that a heat insulating layer is inserted between the stamper and the support for the purpose of delaying the initial cooling of the thermoplastic material during molding. The heat insulation layer is made of a low heat transfer material such as plastic, porous metal, ceramics, low heat transfer alloy. Furthermore, it has been proposed that the central portion in the thickness direction be low density and the edge portion be high density.

Although the thermoplastic material contacts the relatively cool surface of the mold and is initially cooled to temporarily drop below the glass transition temperature, heat energy is supplied from the hot molten thermoplastic material. By providing the heat insulating layer, heat dissipation due to heat conduction is suppressed. The mold surface is reheated and the surface temperature rises above the glass transition temperature. Accordingly, roughening due to rapid cooling of the thermoplastic material can be prevented, and transferability can be improved. Also, International Publication No. WO2007 / 123210 discloses that one of the opposed molds and the transfer plate is placed on top of each other. A resin molding apparatus having a heat insulation layer grown on the substrate is proposed, and the heat insulation layer is formed of one mold or transfer plate as a substrate, and a wall-like heat insulation layer is formed by nickel plating using a resist mask having a honeycomb-like opening pattern. It is also proposed to grow. The voids between the honeycomb-like nickel walls exhibit a heat insulating function and reduce heat transfer. Therefore, the thermal energy of the molding material can be prevented from escaping to one mold, and the skin layer can be prevented from being formed. Moreover, since the temperature of the molding apparatus can be set low, the temperature lowering speed of one mold and the transfer plate can be increased, and the molding cycle can be sufficiently shortened.

  A member having a heat insulating function such as a heat insulating layer may be referred to as a heat insulating member and a member for transferring an uneven pattern such as a stamper or a transfer plate as a transfer member.

  A mold for injection molding of a thermoplastic resin material is repeatedly exposed to a heat cycle of heating with a molten resin and cooling with a coolant such as cooling water. Each member undergoes a temperature change according to its position by a thermal cycle, and repeats thermal expansion and thermal contraction. Even if the mold member, the heat insulating member, and the transfer member are all made of metal, the amount of thermal expansion and contraction varies depending on the member due to temperature distribution. When the friction between the opposing surfaces is large, a large stress acts between the members.

Japanese Patent No. 3066254 JP-A-7-178774 International Publication No. WO2007 / 123210

  One object of the present invention is to provide a heat insulating member suitable for a resin injection molding apparatus, which has a small friction between adjacent members, is easy to manufacture and has excellent durability, and a method for manufacturing the same.

  Another object of the present invention is to provide a heat insulating member whose heat resistance can be easily adjusted and a method for manufacturing the same.

According to one aspect of the present invention,
A plate portion having a flat back surface and a surface, and a plurality of linear partition walls formed in parallel on the surface of the plate portion, each of the partition walls being parallel to the side wall surface and the surface A first member having a top surface;
A plate portion having a flat back surface and a surface, and a plurality of linear partition walls formed in parallel on the surface of the plate portion, each of the partition walls being parallel to the side wall surface and the surface A second member having a top surface and formed with a groove into which the partition wall of the first member can be inserted;
There is provided a heat insulating member in which the first member and the second member are opposed to each other with the back face outside, and a partition wall of the first member is inserted into a groove of the second member.

According to another aspect of the invention,
a) a plate portion having a flat back surface and a surface, and a plurality of linear partition walls formed in parallel on the surface of the plate portion, each of the partition walls having a parallel side wall surface and the surface Producing two first members having parallel top surfaces;
b) forming a groove in one partition wall of the first member to form a second member, wherein the groove of the second member is formed so that the partition wall of the first member can be inserted; ,
c) inserting the partition wall of the first member into the groove of the second member and combining the first member and the second member;
The manufacturing method of the heat insulation member containing is provided.

  Since both surfaces are flat, the friction between adjacent members can be reduced.

  By making the heat insulating member into a two-member fitting structure to create a gap, the heat insulating property can be increased, and by making the partition walls into a lattice shape, the durability can also be increased.

  A straight partition is easy to manufacture.

1A and 1B are a schematic sectional view showing a basic structure of a heat insulating member according to Example 1, and a schematic plan view of a partition wall portion of the heat insulating member. 2A to 2D are schematic perspective views illustrating main processes of the manufacturing method of Example 1 in which a heat insulating member is formed by two members. 3A to 3C are schematic perspective views illustrating main processes of a modified example of the manufacturing method according to the first embodiment. 4A to 4C are schematic perspective views illustrating main steps of a method for manufacturing a heat insulating member according to Example 2 that can obtain high thermal resistance. 5A and 5B are schematic cross-sectional views illustrating the configuration of the heat insulating member according to the third embodiment. 6A and 6B are a schematic sectional view and a partially enlarged sectional view showing a configuration of a resin injection molding apparatus provided with a heat insulating member. FIG. 7 is a schematic cross-sectional view showing a configuration of a mold apparatus that does not have a heat insulating member. FIG. 8 is a schematic cross-sectional view showing a configuration of a mold apparatus provided with a heat insulating member. FIG. 9 is a graph showing a comparison of the characteristics of the mold apparatus with and without the heat insulating member.

  First, the basic configuration of the mold apparatus will be considered.

  As shown in FIG. 7, for example, a mold apparatus 101 for forming a light guide plate includes a fixed mold 102 that is fixed and a movable mold 103 that is freely moved forward and backward. The movable mold 103 includes an upper plate 121 and a lower plate 122 that receives the upper plate 121. A transfer plate 134 is disposed on the upper plate 121. Fine irregularities are formed in a predetermined pattern on the upper surface of the transfer plate 134. The movable mold 103 is advanced by the mold clamping device 104 to close the mold, and the movable mold 103 is brought into contact with the fixed mold 102 to perform mold clamping. Cavities C1 and C2 having a rectangular cross section are formed between the fixed mold 102 and the movable mold 103.

  The sprue 105 formed in the fixed mold 102 communicates with the cavities C1 and C2 via the gates g1 and g2, and allows molten resin to flow into the cavities C1 and C2. A temperature adjusting flow path 123 is formed in the lower plate 122, and the mold apparatus and the resin are cooled by flowing a temperature adjusting fluid such as water. The resin poured into the cavities C1 and C2 is cooled and solidified, and is taken out as a molded product. If the temperature of the mold apparatus is too low, the skin layer develops too much and transfer defects tend to occur. Further, when the temperature of the mold apparatus is increased in order to ensure the fluidity of the molten resin, the cooling time becomes longer and the molding cycle becomes longer.

  FIG. 8 shows a mold apparatus 161 for forming, for example, a light guide plate provided with a heat insulating member (heat insulating layer). A heat insulating member 140 is formed on the upper surface of the base portion of the movable mold 103, and a transfer plate 134 is attached thereon. The molten resin 130 is injected from the sprue 105 of the mold apparatus that has been clamped, and the molten resin 130 is filled into the cavities C1 and C2 through the gates g1 and g2. The mold apparatus 161 is formed with a temperature control flow path 123, and the mold apparatus and the resin are cooled by flowing a temperature control fluid such as water. As a result, the resin filled in the cavities C1 and C2 is cooled and solidified. At this time, since the heat resistance is increased by the heat insulating member 140, even if the temperature of the mold apparatus is set low, the heat flow from the molten resin 130 to the mold is suppressed, and the initial temperature reached by the transfer plate 134 can be increased. , Too much development of the skin layer can be suppressed. In the process of cooling the resin, since the set temperature of the mold apparatus is low, the cooling proceeds promptly.

  FIG. 9 is a diagram illustrating characteristics of the mold apparatus. The horizontal axis represents time, and the vertical axis represents temperature. A curve L1 indicates the temperature of the transfer plate 134 when the resin is molded using the mold apparatus 101 without a heat insulating member, and a curve L3 is when the resin is molded using the mold apparatus 161 provided with a heat insulating member. The temperature of the transfer plate 134 is shown.

  First, from the characteristics without the heat insulating member (curve L1), when the resin flows into the cavities C1 and C2 of the mold 101, the molten resin is at a high temperature. Rises rapidly. However, since much heat is deprived to the lower plate 122 side that is cooled by the cooling water, the temperature of the transfer plate 134 becomes the temperature T1 at the time t1 when the transfer is completed. Accordingly, the filled molten resin is rapidly cooled by the transfer completion time t1, so that the skin layer is easily formed and the formed skin layer is easily developed. After the transfer is completed, the temperature T2 at which the resin filled in the cavity is solidified and can be taken out is reached at time t2, and the mold starts to open, but the transfer is performed because the temperature of the mold apparatus is set high. Since the temperature of the plate 134 falls very slowly, the molding cycle becomes long. By the way, the depth of the concavo-convex pattern transferred to the resin is considerably smaller than the thickness of the skin layer to be formed. In order to transfer the concavo-convex pattern to the skin layer where the resin is somewhat solidified, the skin layer needs to be crushed and plastically deformed by the compressive force generated by the clamping of the mold apparatus, Since it is necessary to apply a large compressive force, the uneven pattern of the transfer plate tends to deteriorate.

  On the other hand, in the characteristic (curve L3) when the heat insulating member is provided, the thermal energy of the resin can be prevented from escaping to the movable mold 103 side. Therefore, even if the cooling capacity of the lower plate 122 is set high, the transfer can be performed. The temperature of the plate 134 can be maintained at T1 or higher for a long time. Accordingly, the fluidity of the resin is ensured until the transfer is completed, the development of the skin layer can be suppressed, and the transferability can be improved. After the transfer, since the cooling capacity of the lower plate 122 is set high, the temperature of the transfer plate 134 can be rapidly lowered. Therefore, since the resin can reach the temperature T2 at which the resin is solidified and can be taken out at time t3, the molding cycle can be shortened. When the skin layer with some solidified resin is crushed and plastically deformed by the compressive force generated by the clamping of the mold device, the compressive force can be reduced as it conforms to the concavo-convex pattern of the transfer plate. Deterioration of the uneven pattern on the plate can be prevented. Therefore, the durability of the transfer plate can be improved.

  When a high temperature resin is filled in this way, heat is rapidly lost to the mold when there is no thermal insulation member, so the initial temperature rise of the transfer plate is suppressed, and when a thermal insulation member is used, the mold is lost. Since the generated heat is suppressed, it is considered that the initial temperature rise of the transfer plate is large. At the time of cooling, it can be seen that the temperature of the mold can be set lower when the heat insulating member is used, compared to the case without the heat insulating member, so that the cooling rate is increased.

  Therefore, it can be seen that using a heat insulating member is effective in shortening the cycle time of the resin molding cycle. By the way, when forming a heat insulation member with a metal, it is desirable to make a space | gap part in order to reduce heat conductivity. When a partition wall is formed by plating using a resist mask in order to create a void, the upper surface has a structure with irregularities, and if the surface of the heat insulating member has irregularities, the friction between adjacent members increases.

  The inventors of the present invention have considered that the heat insulating member is manufactured by a metal structure having flat surfaces on both sides and having a void inside.

  1A and 1B are a schematic sectional view showing a basic structure of a heat insulating member according to Example 1, and a schematic plan view of a partition wall portion of the heat insulating member. As shown in FIG. 1A, a partition wall portion 2 is disposed on a lower plate portion 1 having a parallel flat surface, and an upper plate portion 3 having a parallel flat surface is further disposed thereon. The lower surface of the lower plate portion 1 and the upper surface of the upper plate portion 3 are flat and smooth, enabling surface contact with little friction. As shown in FIG. 1B, the partition wall 2 has a square lattice shape and has a shape surrounding the gap 4. Since the gap is filled with air or other gas, the heat insulation is high. The partition wall portion 2 mechanically and thermally connects the upper plate portion 3 and the lower plate portion 1. The thermal resistance increases as the area of the gap is increased, the area of the partition is reduced, and the height of the partition is increased. By appropriately setting the distance between the partition walls, the thermal characteristics as the heat insulating member can be made substantially uniform in the plane. By adopting a square lattice shape, high durability can be realized, and mechanical characteristics in the horizontal direction and the vertical direction in the figure can be made equal. A closed void cannot be produced by processing from a stripping material, and can be obtained by combining a plurality of members.

  2A to 2D are schematic perspective views showing main steps of the manufacturing method of Example 1 in which a heat insulating member is formed by two members, and the resulting structure. As shown in FIG. 2A, by machining a plate material having a flat back surface and a surface, the side wall surface parallel to the plate portion 1 (3) having the flat back surface and surface and the top surface parallel to the plate surface. A first member 11 in which linear partition walls (convex portions) 2a having a surface are arranged in parallel is produced. The processing of removing the surface portion of the plate material in a stripe shape along a straight line can be easily performed. As shown in FIG. 2B, as in FIG. 2A, by machining the plate material, a side wall surface parallel to the plate portion 3 (1) having a flat back surface and a surface and a top surface parallel to the plate portion surface are obtained. The 2nd member 12 in which the linear partition (convex part) 2b which has is arranged in parallel is produced, and also the groove | channel 13 orthogonal to the partition 2b is produced by machining. Since the groove forming process is also a process of removing the stripe region along the straight line, it can be easily performed. In this embodiment, the partition walls 2a and 2b have the same height, width and pitch. The groove 13 has the same depth as the height of the partition 2b and a width that allows the partition 2a to be inserted, and is formed at the same pitch as the partition 2a. For example, the cross-sectional shape of the groove 13 is the same as the cross-sectional shape of the partition wall 2a. The back surfaces of the first member 11 and the second member 12 are flat and smooth surfaces. As shown in FIG. 2C, one of the first member 11 and the second member 12 is inverted so that the partition walls 2 a and 2 b face each other, and the in-plane position of the partition wall 2 a is aligned with the in-plane position of the groove 13. To do. As shown in FIG. 2D, the first member 11 and the second member 12 are brought close to each other, and the partition wall 2a is inserted into the groove 13 and advanced until it abuts. The partition walls 2a and 2b are in contact with the surfaces of the opposing plate portions 3 and 1. Thus, the heat insulation member which has the structure shown to FIG. 1A and 1B is produced.

  3A to 3C are schematic perspective views illustrating main processes of a modified example of the manufacturing method according to the first embodiment.

  As shown in FIG. 3A, by molding a cemented carbide plate having a flat surface, a molding die 21 in which linear grooves 22 having parallel side wall surfaces and a bottom surface parallel to the surface are arranged in parallel. Is made. The grooves have the same dimensions and are arranged at a predetermined pitch. The processing is removal of the stripe region along the straight line and can be easily performed. A metal glass plate-shaped material 24 having a flat surface is held by a support plate and disposed above the molding die 21.

  Metallic glass is an amorphous alloy (amorphous alloy) in which atoms are randomly arranged over a wide range. By selecting the metal composition, high strength, high hardness, high toughness, low Young's modulus, high corrosion resistance, Properties such as soft magnetism and low thermal conductivity can be imparted. Metallic glass is excellent in transfer moldability, and can be easily transfer-molded by heating and pressurizing to a temperature higher than the glass transition temperature to enable highly accurate transfer. Therefore, a heat insulating member having a fine structure, excellent durability, and easy to handle can be realized.

  The plate-shaped molding material 24 of metal glass and the molding die 21 are heated to the glass transition temperature or higher of the metallic glass, and the molding material 24 is pressed against the molding die 21 and pressed. The molding material 24 enters the groove 22 while being deformed. The groove 22 is embedded to finish the pressing, and after cooling, the molded material 24 is extruded in a direction parallel to the groove, released from the molding die 21 and taken out.

  As shown in FIG. 3B, the first member 11 in which the linear partition walls 2a (2b) are arranged in parallel on the plate portion 1 is obtained. When trying to fabricate a honeycomb structure or lattice structure partition by transfer, it was difficult to release the mold, but in the case of straight parallel grooves, it was confirmed that the material to be molded could be easily released from the molding matrix. . By repeatedly performing press transfer using the same molding die, a plurality of first members can be produced more efficiently than when each member is produced by machining. Two first members 11 are produced, and one of them is further processed to produce a second member.

  As shown in FIG. 3C, one first member 11 is machined to produce a groove 13 orthogonal to the partition wall 2b. The grooves 13 have the same depth as the height of the partition walls 2a (2b) and a width that allows the partition walls 2a to be inserted, and are formed at the same pitch as the partition walls 2a. For example, the cross-sectional shape of the groove 13 is the same as the cross-sectional shape of the partition wall 2a. The obtained member becomes the second member 12 in which the groove 13 is formed in the partition wall 2b. The first member 11 and the second member 12 thus obtained are equivalent to the first member and the second member shown in FIGS. 2A and 2B. By fitting two members as shown in FIG. 2C, the heat insulating member shown in FIG. 2D is obtained.

  In Example 1, the top surface of the partition wall is in contact with the opposing plate surface. That is, only the partition wall is occupied by a continuous member between both surfaces. The thermal resistance can be adjusted by 1) adjusting the height of the partition wall and 2) adjusting the area ratio between the gap and the partition wall. Although the partition wall 2a is in contact with the bottom surface of the groove 13, the thermal resistance is greatly increased if the partition wall 2a is separated from the opposing plate surface.

  FIGS. 4A to 4C are schematic perspective views showing main steps of the method for manufacturing a heat insulating member according to Example 2 and the resulting structure, which are easy to obtain high thermal resistance.

  As shown in FIG. 4A, two first members 11 in which linear partition walls 2a (2b) are arranged in parallel are produced on a plate portion 1 (3) by the same process as in the first embodiment or its modification.

  As shown in FIG. 4B, as in FIGS. 2B and 3C, one of the first members 11 is machined to produce a groove 13 perpendicular to the partition wall 2b, thereby forming a second member 12X. The second member 12X includes a plate portion having a flat back surface and a surface, and a plurality of linear partition walls 2b formed in parallel on the surface of the plate portion, each of the partition walls 2b being parallel side wall surfaces. And a groove 13 having a depth that is shallower than the height of the partition wall 2b and a width that allows the partition wall 2a of the first member to be inserted. For example, the depth of the groove is about half of the height of the partition wall.

  As shown in FIG. 4C, the heat insulating member is obtained by fitting the two members 11 and 12X. Since the groove depth is shallower than the partition wall height, the top surfaces of the partition walls 2a and 2b do not reach the surface of the opposing plate portion 1 (3), and a gap is formed therebetween. By sandwiching the air gap, the thermal resistance is greatly increased. In the present embodiment, only the intersection of the partition walls 2a and 2b is occupied by the continuous member between both surfaces. In the present embodiment, the first member and the second member are separated from the surface of the plate portion opposite to the top surface of the partition wall.

  5A and 5B show a configuration according to Example 3 in which a part of the partition wall is in contact with the opposing plate surface, while the other part is separated from the opposing plate surface.

  FIG. 5A shows a case where the first member 11 has a high partition 2c and the second member 12 has a low partition 2d. A groove having the same depth as the height of the partition 2d is formed in the partition 2d of the second member 12 as in the first embodiment. When the partition wall 2c of the first member 11 is inserted into the groove formed in the partition wall 2d of the second member 12, the top surface of the partition wall 2c of the first member 11 reaches the surface of the plate portion of the opposing second member 12, but the second The top surface of the partition wall 2d of the member 12 does not reach the plate portion surface of the first member. In this case, the difference between the directions of the mechanical strength may be reduced by shortening the pitch of the partition walls 2d that do not reach the surface of the counter plate portion. In addition, the groove | channel which accommodates the short partition 2d can also be formed in the high partition 2c.

  FIG. 5B shows a case where partition walls having different heights are formed on the same plate portion. On the plate part 1, the first member 11 (second member 12) in which, for example, the high partition 2c and the low partition 2d are alternately manufactured is manufactured. In the case of the manufacturing method shown in FIG. 3A, the groove 22 formed in the molding die 21 may be two types having different depths. Two first members 11 are produced, and grooves 2c and 2d of one first member 11 have a depth that is the same as the height of the partition walls and reaches the plate part surface by machining as in the first embodiment. The second member 12 is used. The partition walls 2 c and 2 d of the first member 11 are inserted into the grooves of the second member 12. The high partition 2c reaches the opposing plate surface, but the low partition 2d does not reach the opposing plate surface.

  FIG. 6A is a schematic cross-sectional view showing the configuration of a resin molding apparatus incorporating a heat insulating member produced in this way. In the resin molding apparatus 150, the fixed mold 102 and the movable mold 103 are arranged to face each other to define a cavity. The fixed mold 102 and the movable mold 103 each have a cooling water channel 123. A heat insulating member 140 is disposed on the fixed mold 102, and a stamper 134 is disposed thereon. The heat insulating member 140 and the stamper 134 as a transfer member are held on the surface of the fixed mold 102 via a mechanical chuck and an air chuck.

  As shown in FIG. 6B, in order to reduce friction between the stamper 134 and the fixed mold 102 due to thermal expansion and contraction based on the heat cycle, DLC ( Low friction, wear resistant material 145 such as diamond-like carbon) is coated. The low friction, wear resistant material may be coated only on the surface of the heat insulating member 140 on the stamper 134 side, or may be coated only on the surface of the fixed mold 102 side. The resin 130 flows into the cavity between the fixed mold 102 and the movable mold 103.

In forming optical media, a maximum pressure of about 300 kg / cm ² or more is applied to a 12 cm diameter disk. The stamper 134 is manufactured by, for example, nickel electroplating, and has a fine unevenness pattern with a thickness of about 0.3 mm and a submicron size. The heat insulating member 140 is a disk-shaped plate. If the thickness of the heat insulating member 140 is too thin, the heat insulating effect will be insufficient, and the transfer accuracy will be lowered. Therefore, it is desirable to set the total thickness of the heat insulating member 140 and the thickness of the partition wall to appropriate thicknesses.

  As mentioned above, although this invention was demonstrated along the Example, this invention is not restrict | limited to these. For example, metal glass is used as a material to be molded by the molding die, but a metal having moldability such as green containing metal powder can be used. It will be apparent to those skilled in the art that other various modifications, substitutions, improvements, combinations, and the like are possible.

1 Lower plate part,
2 partition wall,
3 Upper plate,
4 voids,
11 first member,
12 Second member,
13 groove,
21 Molding mold,
22 grooves,
24 Material to be molded.

Claims (14)

In a mold apparatus having one mold, a transfer member, and a heat insulating member disposed between the one mold and the transfer member, the heat insulating member includes:
A plate portion having a flat back surface and a surface, and a plurality of linear partition walls formed in parallel on the surface of the plate portion, each of the partition walls being parallel to the side wall surface and the surface A first member having a top surface;
A plate portion having a flat back surface and a surface, and a plurality of linear partition walls formed in parallel on the surface of the plate portion, each of the partition walls being parallel to the side wall surface and the surface A second member having a top surface and formed with a groove into which the partition wall of the first member can be inserted;
The first member and the second member are opposed to each other with the back side facing outside, and the partition wall of the first member is inserted into the groove of the second member.
Mold equipment.   The mold apparatus according to claim 1, wherein a partition wall of the first member and a partition wall of the second member are orthogonal to each other.   The mold apparatus according to claim 1, wherein the partition wall of the first member and the partition wall of the second member have the same height.   The mold apparatus according to claim 3, wherein the groove depth of the second member is equal to the height of the partition wall of the first member, and the top surface of the partition wall of the first member is in contact with the surface of the opposing second member. .   The mold apparatus according to claim 3, wherein a depth of the groove of the second member is shallower than a height of the partition wall of the first member.   The mold apparatus according to claim 1 or 2, wherein the partition wall of the first member and the partition wall of the second member have different heights.   The top surfaces of the partition walls of the first member and the partition walls of the second member are in contact with the surfaces of the opposing members, and the top surfaces of the remaining portions of the partition walls of the first member and the second member The mold apparatus according to claim 1, wherein the mold apparatus is separated from the surface of the opposing member.   The mold apparatus according to claim 1, wherein the first member and the second member are made of metal glass. A heat insulating member for a mold apparatus having one mold, a transfer member, and a heat insulating member disposed between the one mold and the transfer member,
A plate portion having a flat back surface and a surface, and a plurality of linear partition walls formed in parallel on the surface of the plate portion, each of the partition walls being parallel to the side wall surface and the surface A first member having a top surface;
A plate portion having a flat back surface and a surface, and a plurality of linear partition walls formed in parallel on the surface of the plate portion, each of the partition walls being parallel to the side wall surface and the surface A second member having a top surface and formed with a groove into which the partition wall of the first member can be inserted;
The first member and the second member are opposed to each other with the back side facing outside, and the partition wall of the first member is inserted into the groove of the second member.
Thermal insulation member for mold equipment.   The partition wall of the first member and the partition wall of the second member have the same height, the depth of the groove of the second member is equal to the height of the partition wall of the first member, and the top of the partition wall of the first member. 10. The heat insulating member for a mold apparatus according to claim 9, wherein a surface is in contact with the surface of the opposing second member, and a top surface of the partition wall of the second member is in contact with the opposing surface of the first member. In a method of manufacturing a mold apparatus having one mold, a transfer member, and a heat insulating member disposed between the one mold and the transfer member,
a) a plate portion having a flat back surface and a surface, and a plurality of linear partition walls formed in parallel on the surface of the plate portion, each of the partition walls having a parallel side wall surface and the surface Producing two first members having parallel top surfaces;
b) forming a groove in one partition wall of the first member to form a second member, wherein the groove of the second member is formed so that the partition wall of the first member can be inserted; ,
c) inserting the partition wall of the first member into the groove of the second member, and combining the first member and the second member to form a heat insulating member;
Method of manufacturing a mold apparatus including Said step a)
a-1) preparing a forming matrix in which a plurality of linear grooves having a side wall surface parallel to a cemented carbide plate material having a flat surface and a bottom surface parallel to the surface are prepared in parallel;
a-2) pressing a metal glass plate on the molding die, a plate portion having a flat back surface and a surface, and a plurality of linear partition walls formed in parallel on the surface of the plate portion; Each of the partition walls has a side wall surface parallel to the top surface and a top surface parallel to the surface.
The manufacturing method of the metal mold | die apparatus of Claim 11 containing this.   13. The method for manufacturing a mold apparatus according to claim 11, wherein the step b) forms a groove having the same depth as the height of the partition wall.   The method for manufacturing a mold apparatus according to claim 11 or 12, wherein the step b) forms a groove having a depth shallower than a height of the partition wall.

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