Recording device and recording method

Abstract

To provide a sound recording device and a sound recording method that take anti-static measures when engraving sound grooves directly on a resin-made master.SOLUTION: A sound recording device (1) is a sound recording device for engraving sound grooves on a resin-made master (2), and includes coating means (105) for coating an anti-static agent on the resin-made master (2) before engraving the sound grooves.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a recording device and a recording method that are applied to a record. [Background technology]

[0002] Records, especially those for mass production, are manufactured through a process in which grooves are engraved into a lacquer disc (hereafter referred to as a metal master), which is made by applying a lacquer agent mainly made of nitrocellulose to a metal disk such as aluminum, and then this metal master is metal-plated to create a stamper that copies the grooves.This stamper is then used to press a resin material to create the record.

[0003] However, when producing records for small-scale production, such as one-off production for listening trials, the mass production process is not cost-effective. Therefore, instead of the metal masters (costing about 30,000 yen each), inexpensive resin masters (costing about 3,000 yen each) are used, and sound grooves are engraved directly into the resin master to produce the records (Patent Document 1, hereinafter referred to as "related technology").

[0004] In this related technology, a vinyl record is manufactured by directly carving grooves into a resin master, which has a core made of a plate-shaped vinyl chloride resin and has vinyl resin-based sheets laminated on both sides of the core. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-34901 Summary of the Invention [Problem to be solved by the invention]

[0006] However, this related technology does not take any measures to prevent static electricity from building up when carving sound grooves into a resin master, so there is a problem in that it is not possible to prevent problems caused by static electricity (such as noise generation).

[0007] Therefore, an object of the present invention is to provide a method for preventing static electricity when directly engraving sound grooves on a resin master. Taroku The present invention aims to provide a sound method. [Means for solving the problem]

[0008] The recording method of the present invention is characterized by comprising an antistatic step of applying an antistatic agent to a resin master before engraving a sound groove, a sound groove engraving step of engraving a sound groove into the resin master after the antistatic agent has been applied, a cleaning step of high-frequency cleaning the resin master after engraving the sound groove, and a cleaning liquid removal step of removing cleaning liquid remaining on the resin master after the high-frequency cleaning. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a recording device and a recording method in which anti-static measures are taken when directly carving sound grooves into a resin master. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is an overall conceptual diagram of a recording device 1 according to an embodiment. [Figure 2] FIG. 2 is a diagram showing the appearance of the cutting machine section 100. [Figure 3] FIG. 2 is a conceptual explanatory diagram of the main functions of the cutting machine section 100. [Figure 4] 10 is an explanatory diagram of the anti-static function of the cutting machine section 100. FIG. [Figure 5] FIG. 2 is a diagram showing the appearance of an ultrasonic cleaning unit 200. [Figure 6] 1 is a diagram showing the appearance of a vacuum suction unit 300. FIG. [Figure 7] FIG. 2 is a process diagram of a recording method according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram of the embodiment, in which a sound recording device 1 includes a cutting machine unit 100, an ultrasonic cleaning unit 200, and a vacuum suction unit 300.

[0012] The main functions of each section are as follows: the cutting machine section 100 carves grooves into the record 2; the ultrasonic cleaning section 200 ultrasonically cleans the record 2 after the grooves have been carved; and the vacuum suction section 300 sucks cleaning fluid from the record 2 after ultrasonic cleaning.

[0013] The cutting machine section 100 includes a coating means 105, which will be described later.

[0014] Here, the record 2 is a resin master, such as a vinyl chloride disc, which is cheaper than the metal master (lacquer disc) mentioned at the beginning.

[0015] Each part will be explained in detail. [Cutting machine section 100] FIG. 2 shows the external appearance of the cutting machine unit 100, where (a) is a photograph of the external appearance and (b) is an explanatory diagram of the photograph. In this diagram, cutting machine section 100 comprises cabinet 101, turntable 102 on which record 2 is placed and rotates, listening tone arm section 103, control panel 104, application means 105, and groove engraving section 106, which further comprises groove engraving head section 107, head drive mechanism 108, and nozzle 109 for sucking up shavings during engraving. In addition to these, heating means (lamp as an example) 110, 111 may also be provided for raising the surface temperature of the resin master to 40 degrees or higher.

[0016] As outlined above, the main function of the cutting machine section 100 is to carve sound grooves into a disk (record 2) made of a resin material.

[0017] FIG. 3 is a conceptual diagram illustrating the main functions of the cutting machine unit 100. In this diagram, the head drive mechanism 108 has three functions: a first function of pressing the tip of the engraving needle 112, made of a hard material (e.g., sapphire) attached to the head unit 107, against the surface of the record 2 with a predetermined pressure P; a second function of driving the head unit 107 in a radial direction D from the outer periphery toward the center of the record 2 while this pressing action is in progress; and a third function of amplifying an electrical signal from a sound source 113 with an amplifier 114 and vibrating the engraving needle 112 with the amplified electrical signal while these first, second, and third functions are performed to accomplish the main function outlined above, namely, engraving a sound groove into the resin record 2. Hereinafter, this main function will be referred to as the "sound groove engraving function."

[0018] The cutting machine unit 100 of the embodiment is characterized by having a function to prevent static electricity during the sound groove engraving process in addition to the sound groove engraving function. Hereinafter, this function will be referred to as the "static prevention function."

[0019] Figure 4 is an explanatory diagram of the anti-static function of the cutting machine unit 100. In this diagram, the application means 105 is the element that realizes the anti-static function, and this application means 105 has a main body 115 with its length oriented in the radial direction of the record 2 and a pad 116 attached to this main body 115. Pad 116, which is soaked in an anti-static agent, is used by lightly pressing it against the surface of the record 2 as it is rotated.

[0020] The antistatic agent used here may be any agent that has the ability to prevent static buildup during groove engraving, and for example, "Antistatic Wax" manufactured by Miscellaneous may be used.

[0021] If this antistatic agent is applied to the record 2 before the sound grooves are engraved, it is possible to prevent the record 2 from becoming charged when the sound grooves are engraved, and to prevent charging of the sound groove shavings.

[0022] Here, the supply of antistatic agent to the pad 116 of the application means 105 and the pressing of the pad 116 against the record 2 may be performed manually, but it is preferable to perform this mechanically.

[0023] [Ultrasonic cleaning unit 200] FIG. 5 shows the appearance of the ultrasonic cleaning unit 200, where (a) is a photograph of the appearance and (b) is an explanatory diagram of the photograph. In this figure, the ultrasonic cleaning unit 200 comprises a bathtub-shaped recessed case 201 with a volume large enough to fully immerse the entire record 2, cleaning liquid 202 contained in this recessed case 201, a vibration source 203 that ultrasonically vibrates the cleaning liquid 202, and a holding member 204 that holds the record 2 immersed in the cleaning liquid 202.

[0024] The cleaning liquid 202 is used to clean the record 2 after the grooves have been engraved, and can be, for example, a solution of 75-80% impurity-free water (preferably distilled water or absolute ethanol), 15-20% ethylene glycol, 2-5% methanol, and 2-5% polyoxyalkylene alkyl ether functional group. By using a cleaning solution 202 with such ingredients, the ultrasonic vibrations can be used to thoroughly wash away the shavings produced when the sound grooves are engraved, and also to wash away any residue of the antistatic agent that was applied to the record 2 before the sound grooves were engraved.

[0025] In addition, the cleaning liquid 202 also has an anti-static effect, so that the record 2 can be prevented from being contaminated with dust for a long period of time.

[0026] [Vacuum suction part 300] FIG. 6 shows the appearance of the vacuum suction unit 300, where (a) is a photograph of the appearance and (b) is an explanatory diagram of the photograph. In this figure, the vacuum suction unit 300 comprises a turntable 301 that is rotated by a drive mechanism (not shown), and a suction head 302 that vacuums the surface of the record 2 placed on the turntable 301 without contact, removing any cleaning liquid remaining on the surface of the record 2 and drying it.

[0027] According to this embodiment, the following effects can be achieved. (Effect 1) Since a resin master, which is cheaper than a metal master, is used for the record 2, the manufacturing cost can be reduced. (Effect 2) When a resin master is used for the record 2, various types of static electricity are generated during the engraving process, such as static electricity generated on the record 2 itself due to the rubbing of the engraving needle 112 against the record 2, static electricity generated in the shavings during engraving, and static electricity generated by the suction of the shavings.However, in this embodiment, an antistatic agent is applied to the record 2 by the application means 105 before the engraving of the sound grooves, so there are no problems with charging due to static electricity. (Effect 3) The cleaning liquid 202 used to wash away shavings and antistatic agent residue in the ultrasonic cleaning unit 200 also has an antistatic effect, so dust adhesion to the record 2 can be prevented for a long period of time.

[0028] 7 is a process diagram of the recording method according to the embodiment. In this diagram, the processes are carried out in the following order: anti-static step S1, sound groove engraving step S2, cleaning step S3, and cleaning liquid removal step S4. The anti-static step S1 and sound groove engraving step S2 are carried out in the cutting machine unit 100, the cleaning step S3 in the ultrasonic cleaning unit 200, and the cleaning liquid removal step S4 in the vacuum suction unit 300.

[0029] In the above explanation, a vinyl chloride disc was used as the record 2, but this is not limiting. Any resin master, which is cheaper than a metal master (lacquer disc), will do.

[0030] The antistatic agent applied to the pad 116 of the application means 105 is not limited to the product name "Antistatic Wax" manufactured by Miscellaneous, Inc. Any agent capable of preventing static electricity during groove engraving may be used.

[0031] The ingredients of the cleaning liquid 202 are not limited to those given above. Anything will do as long as it can thoroughly wash away the shavings produced when the sound grooves are engraved using ultrasonic vibrations, as well as any residue of the antistatic agent applied to the record 2 before the sound grooves are engraved.

[0032] The features of the present invention will be described below. A part or all of the above-described embodiments can be described as, but not limited to, the following supplementary notes. (Appendix 1) Appendix 1 is a recording device that carves sound grooves into a resin master, The recording device is characterized by comprising a coating means for coating the resin master with an antistatic agent before the sound grooves are engraved. (Appendix 2) Appendix 2: The recording device A cutting machine section that carves sound grooves into a resin master; a high frequency cleaning unit that performs high frequency cleaning on the resin master after the sound grooves are engraved; a vacuum suction unit that sucks up the cleaning liquid remaining on the resin master after the high-frequency cleaning; The sound recording device according to claim 1, wherein the cutting machine section is provided with a coating means for coating the resin master with an antistatic agent before the sound grooves are engraved. (Appendix 3) an antistatic step of applying an antistatic agent to the resin master before forming the sound grooves; a sound groove engraving step of engraving sound grooves in the resin master after applying the antistatic agent; a cleaning process in which the resin master is subjected to high frequency cleaning after the sound grooves are engraved; and a cleaning liquid removal step of removing the cleaning liquid remaining on the resin master after the high-frequency cleaning. [Explanation of symbols]

[0033] 1. Recording device 100 Cutting machine section 105 Application means 200 Ultrasonic Cleaning Section 300 Vacuum suction part

Claims

[Claim 1] an antistatic step of applying an antistatic agent to the resin master before forming the sound grooves; a sound groove engraving step of engraving sound grooves in the resin master after applying the antistatic agent; a cleaning process in which the resin master is subjected to high frequency cleaning after the sound grooves are engraved; a cleaning liquid removal step of removing the cleaning liquid remaining on the resin master after the high-frequency cleaning.

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