Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
  • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
  • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
  • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
  • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
  • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
  • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/32—Component parts, details or accessories; Auxiliary operations
  • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
  • B29C43/361—Moulds for making articles of definite length, i.e. discrete articles with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons
  • B29C2043/3615—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices
  • B29C2043/3634—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices having specific surface shape, e.g. grooves, projections, corrugations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C33/00—Moulds or cores; Details thereof or accessories therefor
  • B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
  • B29C33/424—Moulding surfaces provided with means for marking or patterning
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
  • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
  • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
  • B29C35/0888—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using transparant moulds

Definitions

• the present invention relates to a plastic molding method, and more particularly, to an improvement in a technique for producing a molded article made of a plastic material such as a component for precision equipment, a storage medium for electronic equipment and a lens for optical equipment, and a method for manufacturing the same.
• the present invention relates to a molding stamper used.
• the “transfer surface” refers to a surface portion on a substrate to be subjected to an intended molding process.
• a pit of a substrate used for manufacturing a CD-ROM which is a storage medium for electronic equipment is used. It refers to the surface to be formed and the surface used for manufacturing precision lenses.
• the “imprinted surface” refers to the surface on the stamper where the desired molding process is to be performed on the transfer surface of the substrate.
• shape element refers to a protruding piece existing on the shape face, for example, corresponding to a bit of CD-ROM,
• plastic molding the plastic material is melt-plasticized, filled at high temperature into the mold cavities (with pre-installed stanbars) at high speed and high pressure by an injection molding machine, and then cooled and solidified. A molded product with the following shape is obtained.
• This technology is widely used in the industry because of its higher productivity than press molding.
• the plastic material is a viscoelastic substance, and the flow and cooling of the plastic material occur simultaneously in parallel.
• 9 and plastic materials have low thermal conductivity and uneven cooling, resulting in unavoidable stresses and strains in the part: ⁇ External structural defects such as sinks are likely to occur;
• the molded product is a storage medium for electronic equipment having a portion in which a large number of fine grooves or projections are juxtaposed, for example, there is a problem that the intended groove or projection structure cannot be obtained precisely. is there.
• the basic object of the present invention is to maintain high productivity such as injection molding, improve the transferability of plastic materials, and also achieve uniform physical properties (eg, optical To provide a molded article having the following characteristics.
• a base material having a transfer surface and made of a plastic material is prepared, and the base material is fixed in a state where the transfer surface is exposed.
• the aim is to hold the imprinting surface of the stan-hae made of a material in close contact with the transfer surface of the substrate, and to irradiate the stern bar with infrared rays in the direction toward the substrate.
• the stancher has infrared transmittance.
• the conventional stancher is made of a metal that absorbs infrared rays, it does not satisfy this requirement and is used in the process. I can't.
• Another object of the present invention is to provide a stamper suitable for the plastic molding method as described above: Therefore, in a second technical idea of the present invention, The gist is that at least the body other than the stamper having a shaping surface is formed of an infrared transmitting material except for the shaping surface.
• a shaping element is integrally formed on the shaping surface of the main body.
• a shaping element is attached and fixed to a shaping surface.
• the shaping surface is formed by a metal ultra-thin plate integrally provided with a shaping element.
• Infrared rays pass through the main body made of infrared transmitting material and reach the base material side, and the energy absorption causes the base material to be heated and melted near the imprinting surface of the stamper.
• FIG. 1 is a side view showing a first step in one embodiment of the processing method of the present invention
• FIG. 2 is a side view showing a second step in one embodiment of the processing method of the present invention
• FIG. 3 is a side view showing a third step in one embodiment of the working method of the present invention
• FIG. 4 is a side view showing a fourth step in one embodiment of the working method of the present invention.
• FIG. 6 is a cross-sectional side view showing a first embodiment of the stamper of the present invention
• FIG. 6 is a cross-sectional side view showing a second embodiment of the stamper of the present invention
• FIG. FIG. 3 is a cross-sectional side view showing the third embodiment-Best Mode for Carrying Out the Invention
• FIGS. 1 to 4 show an embodiment of the forming method according to the present invention.
• a base material 1 made of a plastic material and having a transfer surface 11 is prepared .
• the base material is, for example, a thin disk when the molded article is a CD-ROM. Are used. If the plastic material is a thermoplastic material, it is appropriately selected according to the application, for example, polystyrene.
• the substrate 1 is fixed to the support frame 3 with its transfer surface 11 facing upward.
• a stamper 5 having a shaping surface 51 is prepared.
• This stamper 5 is formed from an infrared transmitting material.
• the infrared transmitting material selenium zinc (ZnSe), sapphire, infrared glass, etc. are used:
• the entire stamper 5 is formed from the infrared transmitting material. It may be made of a material other than the infrared transmitting material.
• the shaping surface 51 is a surface provided with a pit corresponding to the pit.
• the stamper 5 and the substrate 1 are held so that the imprinting surface 51 and the transfer surface 11 are in close contact with each other. In this state, infrared rays are applied to the stand 5 in the direction toward the substrate 1.
• an infrared light source for example, a carbon dioxide gas laser, a YAG laser or the like is used, but an infrared lamp or the like can also be used.
• the frequency of the infrared radiation to be irradiated is absorbed by the polymer that constitutes the plastic material to be irradiated. Select as appropriate according to the implementation conditions within the acceptable range.
• FIG. 5 shows a first embodiment of a stamper according to the present invention, in which a shaping surface 105 of a body 103 made of an infrared transmitting material of a stub 101 has a large number of shaping surfaces 105.
• Element 107 is engraved on the body:
• the engraving of the shaping element requires high precision, and it is extremely difficult to work.
• the infrared transmitting material generally has a lower hardness than metals used in conventional stampers, the shaping elements formed by engraving are worn out less frequently than the conventional stampers are used.
• this type of stamper is a consumable item and needs to be replaced frequently to maintain high transfer accuracy. As a result, we cannot avoid being expensive.
• the embodiment shown in FIG. 6 solves this point. That is, the shaping element 109 is attached and fixed to the shaping surface 105 of the main body 103 made of an infrared transmitting material by photolithography or the like. In the case of this type, the direct engraving of photolithography is easy in terms of work and high accuracy can be obtained. It is advantageous. Also, after use for plastic molding of a certain specification, the shaping element for plastic molding of a new specification can be removed and the shaping element can be attached by photolithography or the like. It is cost effective.
• the shaping surface of the main body 103 made of an infrared transmitting material is formed by a metal ultra-thin plate 1 11, and the shaping element 1 13 is formed on the thin plate 1 1 1 It has been.
• the thickness of the thin plate is several tens of ⁇ m.
• the thin metal plate 111 is used, infrared light having a short wavelength can be used, and the equipment is inexpensive.
• the heat capacity is small because the structure is extremely thin, and the temperature rises easily and quickly by the absorbed infrared energy.
• the viscosity of the plastic material decreases near the precise imprint surface, the transferability is improved even if the imprint surface has a complicated and precise shape, and the shape accuracy of the molded article is greatly improved.
• the viscosity of the plastic material decreases near the imprinting surface, the orientation of the polymer is relaxed without forming a layer having a different viscosity, and the physical properties become uniform.
• the process can be separated into two stages: production of the base material and infrared irradiation molding.
• the size of the equipment does not increase, so it is possible to equip the equipment at the distribution end. Therefore, if various types of stampers are prepared, it can be manufactured freely on demand at the end of distribution (for example, at a shop selling molded articles).
• the stamper Since almost all parts of the stamper are formed of the infrared transmitting material, the energy of the infrared light is smoothly transmitted to the base material side to promote the heating and melting.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)
• Manufacturing Optical Record Carriers (AREA)
• Shaping Of Tube Ends By Bending Or Straightening (AREA)

Priority Applications (2)

Applications Claiming Priority (4)

Publications (2)

Family

ID=26577490

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Citations (6)

• 2000
  • 2000-11-21 CN CN00816468A patent/CN1402666A/zh active Pending
  • 2000-11-21 KR KR1020027006999A patent/KR100719399B1/ko not_active IP Right Cessation
  • 2000-11-21 AU AU14191/01A patent/AU1419101A/en not_active Abandoned
  • 2000-11-21 DE DE10085261T patent/DE10085261B4/de not_active Expired - Fee Related
  • 2000-11-21 WO PCT/JP2000/008216 patent/WO2001039960A1/ja active IP Right Grant

Patent Citations (6)

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