1-14. (canceled)
15. A method for manufacturing a composite phosphor powder, comprising steps of:
mixing at least two types of phosphor particles with a light transmitting binder to form a precursor of a composite phosphor;
mixing a dispersion medium added with a surfactant with the precursor and stirring the mixture to form stabilized unit particles of the composite phosphor within the dispersion medium; and
heating the dispersion medium to cure the light transmitting binder, thereby solidifying composite phosphor particles.
16. The method according to claim 15, wherein the light transmitting binder comprises an epoxy resin or a silicone resin.
17. The method according to claim 15, wherein the dispersion medium comprises distilled water.
18. The method according to claim 17, wherein a water hardening agent is added to the precursor.
19. The method according to claim 17, wherein the surfactant comprises Poly Acryl Amide (PAA).
20. The method according to claim 15, wherein the dispersion medium comprises alcohol.
21. A light emitting device comprising:
a light emitting diode chip;
a molding resin for encapsulating the light emitting diode chip; and
a composite phosphor powder dispersed within the molding resin, the composite phosphor powder comprising composite particles, wherein each of the composite particles comprises at least two types of phosphor particles having different emission spectrums and a light transmitting binder for binding the phosphor particles, the light transmitting binder formed between the phosphor particles.
22. The light emitting device according to claim 21, further comprising a housing having a recess for seating the light emitting diode chip therein.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A tool holder to be removably fitted into a taper hole which is formed in a spindle of a machine tool such that diameter decreases rearward, comprising:
a holder body having a shank portion and a flange portion formed at a front side of the shank portion;
a taper cone fitted to the shank portion and tapered such that diameter decreases rearward;
an elastic member interposed between a rear-end portion of the flange portion and a front-end portion of the taper cone fitted to the shank portion; and
a stopper member disposed on the shank portion and adapted to support a rear-end face of the taper cone fitted to the shank portion,
wherein an outer circumferential surface of the taper cone is tapered at an angle equal to that at which a wall surface of the taper hole is tapered; and
an inner circumferential surface of the taper cone and an outer circumferential surface of the shank portion are tapered at least partially with respect to an axial direction such that diameter decreases rearward, at equal angles smaller than the angle at which the outer circumferential surface of the taper cone is tapered.
2. A tool holder according to claim 1, wherein the inner circumferential surface of the taper cone and the outer circumferential surface of the shank portion are tapered substantially entirely with respect to the axial direction.
3. A tool holder according to claim 1, wherein an outer circumferential surface of a front portion of the shank portion and an inner circumferential surface of a front portion of the taper cone are tapered such that diameter decreases rearward, at equal angles less than the angle at which the outer circumferential surface of the taper cone is tapered; the front portion of the taper cone is fitted to the front portion of the shank portion; a gap is formed between an intermediate portion of the shank portion and an intermediate portion of the taper cone; an outer circumferential surface of a rear portion of the shank portion and an inner circumferential surface of a rear portion of the taper cone are formed so as to extend straight; and the rear portion of the taper cone is fitted to the rear portion of the shank portion.
4. A tool holder according to claim 1, wherein a slit is formed in the taper cone obliquely with respect to an axial direction over an entire length of the taper cone, and the slit is filled with an elastic member such that the elastic member is bonded to the taper cone.
5. A tool holder according to claim 1, wherein a front slit and a rear slit are formed in the taper cone obliquely with respect to the axial direction at equal angles such that the front and rear slits extend from front and rear ends of the taper cone, respectively, while maintaining a circumferential interval therebetween; and the front and rear slits are filled with an elastic member such that the elastic member is bonded to the taper cone.
6. A tool holder according to claim 1, wherein an annular depression is formed on a rear-end face of the flange portion along a circumference of a front-end portion of the shank portion; at least a portion of the elastic member is accommodated in the annular depression so as to support a front-end face of the taper cone; and the elastic member comprises a plurality of Belleville springs and a washer disposed at least a front or rear side of the plurality of Belleville springs.
7. A tool holder according to claim 1, wherein at least any one of a washer, a spring washer, and a nut to be screw-engaged with a rear-end portion of the shank portion is disposed at the rear-end portion of the taper cone so as to serve as the stopper member.
8. A tool holder according to claim 1, wherein a pair of arcuate shims are removably attached to a rear-end face of the flange portion in such a manner as to be located outside an annular depression formed on the rear-end face and are adapted to abut an end face of the spindle.
9. A tool holder according to claim 1, wherein components of the tool holder are treated for corrosion protection.
10. A tool holder attachment mechanism in which a taper shank portion of a tool holder having a flange portion is inserted into a taper hole formed in a spindle of a machine tool; the taper shank portion is closely fitted into the taper hole by means of a pull-stud draw mechanism provided in the spindle to thereby attach the tool holder to the spindle; and a gap specified in an industrial standard is formed between the spindle and the flange portion, wherein an annular spacer having a thickness corresponding to a sum of the specified gap and a maximum manufacturing tolerance is bonded to the end face of the spindle in a position corresponding to the end face of the flange portion by means of a layer of adhesive.
11. A tool holder attachment mechanism according to claim 10, wherein the spacer is made of wear-resistant steel or hard rubber.
12. A tool holder attachment mechanism according to claim 10, wherein an adhesive application face of the spacer is roughened so as to enhance bonding with the end face of the spindle.
13. A tool holder attachment mechanism according to claim 12, wherein the adhesive application face of the spacer is roughened in any form of a number of grooves extending radially and disposed circumferentially, a number of concentric grooves, and a number of pits.
14. A tool holder attachment mechanism according to claim 10, wherein a portion of the spacer corresponding to a drive key projecting from the end face of the spindle is cut out.
15. A tool holder attachment mechanism according to claim 10, wherein, when a gap formed between the spindle and the flange portion of the tool holder upon attachment to the spindle becomes smaller than a gap specified in the industrial standard if the spacer is not present, a face of the spacer which faces the flange portion is ground in an amount equal to a difference between the specified gap and the gap formed between the spindle and the flange portion of the tool holder upon attachment to the spindle, to thereby reduce a thickness of the spacer.
16. A tool holder attachment mechanism according to claim 11, wherein, when a gap formed between the spindle and the flange portion of the tool holder upon attachment to the spindle becomes smaller than a gap specified in the industrial standard if the spacer is not present, a face of the spacer which faces the flange portion is ground in an amount equal to a difference between the specified gap and the gap formed between the spindle and the flange portion of the tool holder upon attachment to the spindle, to thereby reduce a thickness of the spacer.
17. A tool holder attachment mechanism according to claim 12, wherein, when a gap formed between the spindle and the flange portion of the tool holder upon attachment to the spindle becomes smaller than a gap specified in the industrial standard if the spacer is not present, a face of the spacer which faces the flange portion is ground in an amount equal to a difference between the specified gap and the gap formed between the spindle and the flange portion of the tool holder upon attachment to the spindle, to thereby reduce a thickness of the spacer.
18. A tool holder attachment mechanism according to claim 13, wherein, when a gap formed between the spindle and the flange portion of the tool holder upon attachment to the spindle becomes smaller than a gap specified in the industrial standard if the spacer is not present, a face of the spacer which faces the flange portion is ground in an amount equal to a difference between the specified gap and the gap formed between the spindle and the flange portion of the tool holder upon attachment to the spindle, to thereby reduce a thickness of the spacer.
19. A tool holder attachment mechanism according to claim 14, wherein the spacer has a thinner portion around the cut-out portion, the thinner portion having a thickness less than the specified gap less the maximum manufacturing tolerance.
20. A tool holder attachment mechanism according to claim 19, wherein, when a gap formed between the spindle and the flange portion of the tool holder upon attachment to the spindle becomes smaller than a gap specified in the industrial standard if the spacer is not present, a face of the spacer which faces the flange portion is ground, except the thinner portion, in an amount equal to a difference between the specified gap and the gap formed between the spindle and the flange portion of the tool holder upon attachment to the spindle, to thereby reduce a thickness of the spacer.