JP2007125809A - Lens forming mold assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens forming mold assembly having ease of operation of moving the core pin for modification of the thickness of the lens and allowing easy adjusting work. <P>SOLUTION: The lens forming mold assembly includes the first and second molds 1 and 11 and the first and second core pins 7 and 17 held respectively in the first and second molds 1 and 11 and forming a lens cavity, and an adjusting mechanism 21 for adjustment of the thickness of the lens is arranged in at least one of the first and second molds 1 and 11. The arrangement of the adjusting mechanism 21 permits adjustment of the thickness of the lens without disassembling of the molds and allows easy adjusting work. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lens mold apparatus suitable for application to a camera module or the like used for a mobile phone.

  FIG. 6 is a cross-sectional view of a main part according to a conventional lens molding die device, and FIG. 7 is an enlarged cross-sectional view of a main part according to the conventional lens molding die device. Next, the configuration of a conventional lens molding die apparatus will be described with reference to FIGS. 6 and 7. The conventional lens molding mold apparatus is a first mold having a mold plate 53, a nest 55, and a core pin 56. A main member is formed by the mold 51 and the second mold 61 having the mold plate 65, the insert 66, and the core pin 67.

  The upper first mold 51 on the fixed side is attached to the attachment plate 52, the template 53 attached to the attachment plate 52, the spool 54 provided on the template 53, and the template 53. And a core pin 56 attached to the insert 55 and provided with a concave portion for forming a lens at the bottom, and a runner 57 provided on the lower surface of the template 53 in a state of being connected to the spool 54 and reaching the core pin 56. Have.

  The lower second mold 61 on the movable side includes a movable plate 62, a spacer member 63 disposed on the movable plate 62, a receiving plate 64 disposed on the spacer member 63, and the receiving plate. A mold plate 65 arranged on 64, a nest 66 attached to the mold plate 65, a core pin 67 attached to the nest 66 and provided with a concave portion for forming a lens on the top, and a spool 54; A runner 68 provided on the upper surface of the template 65 in a state of reaching the core pin 67 and an ejector pin 69 provided at the center of the second mold 61 are provided.

  As shown in FIG. 7, the conventional lens molding die apparatus having such a configuration moves the second die 61, and when the first and second die 51, 61 are combined, the core pin The lens cavity K is formed between 56 and 67 and the runners 57 and 68 are also combined.

When the molten lens forming material flows from the spool 54, the lens forming material flows into the lens cavity K through the runners 57 and 68, and a lens is formed. The first and second molds 51 and 61 are moved, and the lens is ejected from the second mold 61 by an ejector pin 69 (see, for example, Patent Document 1).
JP 2004-177863 A

  The lens thickness is determined by the thickness of the lens cavity K between the core pins 56 and 67. However, when changing the lens thickness in the conventional lens mold apparatus, the first and second molds 51 and 61 are disassembled. Thus, since the change of the attachment position of the core pin 56 with respect to the template 53 and the change of the attachment position of the core pin 67 with respect to the template 65 are performed, the work is troublesome and the work time for the change increases. There is a problem.

  The present invention has been made in view of the actual situation of the prior art, and an object of the present invention is to provide a lens mold apparatus that allows easy adjustment of the core pin for changing the lens thickness and allows easy adjustment. There is.

  In order to achieve the above object, as the first solving means of the present invention, the first and second molds which are movable at least on one side and the first and second molds are held respectively. And a first core pin and a second core pin for forming a lens cavity, wherein the core pin is movable in at least one of the first and second molds to adjust the thickness of the lens. For this reason, the adjusting means is provided.

  Further, as a second solving means, the adjusting means is provided in the first and second molds, and the first and second core pins are movable by the adjusting means.

  As a third solving means, each of the first and second molds is provided with a plurality of the first and second core pins for forming the plurality of lens cavities, and a plurality of lenses. It was set as the structure which enabled shaping | molding.

  Further, as a fourth solving means, the adjusting means includes an adjusting member that protrudes out of the mold while being held in the mold, and is held by the mold and receives power from the adjusting member. The core pin is configured to have a movable spacer member.

  Further, as a fifth solving means, the adjustment member includes a screw portion screwed into the mold, an adjustment portion coupled to the screw portion and protruding outside the mold, and the spacer member includes: A movable body that abuts on the core pin, an elastic beam portion that is coupled to the movable body and is elastically deformable, and a base portion that is movable by the screw portion and follows the movement of the screw portion by the elastic beam portion. And when the said screw part was screwed in or unscrewed, it was set as the structure which moved the said movable body via the said elastic beam part, and moved the said core pin.

  The lens mold apparatus according to the present invention includes first and second molds and first and second core pins that are held by the first and second molds to form a lens cavity. And at least one of the first and second molds is provided with adjusting means for moving the core pin and adjusting the thickness of the lens. The lens thickness can be adjusted without disassembling, and an easy adjustment work can be obtained.

  Further, since the adjusting means is provided in the first and second molds, and the first and second core pins can be moved by the adjusting means, a lens having a high accuracy in lens thickness can be obtained.

  Each of the first and second molds is provided with a plurality of first and second core pins for forming a plurality of lens cavities so that a plurality of lenses can be molded. Thus, a plurality of lenses can be molded, and a product with good productivity can be obtained.

Further, the adjustment means has an adjustment member that protrudes out of the mold while being held by the mold, so that the core pin can be easily moved from the outside of the mold by operating the adjustment member, and is held by the mold. Since the spacer member that moves the core pin in response to the power from the adjusting member is provided, a simple configuration can be provided and a compact adjusting means can be provided.
In addition, since the adjustment member is composed of a screw part screwed into the mold and an adjustment part that is coupled to the screw part and protrudes outside the mold, the fine lens thickness can be adjusted and the spacer member Is composed of a movable body that comes into contact with the core pin, an elastic beam portion that is coupled to the movable body, is elastically deformable, and is movable by a screw portion, and a base portion that follows the movement of the screw portion by the elastic beam portion. The structure is simple and the core pin can be moved reliably.

  DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the main part of the lens molding die apparatus of the present invention, and FIG. 2 relates to the lens molding mold apparatus of the present invention. FIG. 3 is a sectional view showing the main part of the lens molding die apparatus according to the present invention and the adjusting means. FIG. 4 is a plan view of the main part showing the adjusting means according to the lens molding mold apparatus of the present invention. 5 and 5 are cross-sectional views of the main part showing another embodiment of the adjusting means according to the lens mold apparatus of the present invention.

  Next, the configuration of the lens molding die apparatus of the present invention will be described with reference to FIGS. 1 to 4. The lens molding mold apparatus of the present invention includes a first receiving plate 3, a first mold plate 5, and a first molding plate. A first mold 1 having a first insert 6 and a first core pin 7, a second receiving plate 14, a second template 15, a second insert 16, and a second core pin 17. A main member is formed by two molds 11 and adjusting means 21 for moving the first and second core pins 7 and 17.

  The upper first mold 1 on the fixed side includes a first mounting plate 2 having a hole 2a in the central portion and a hole 3a provided in the lower portion of the first mounting plate 2 and provided in the central portion. , And a first receiving plate 3 having a pair of recesses 3b provided on both sides of the hole 3a, and a first receiving plate 3 disposed at the lower part of the first receiving plate 3 and having a spool 4 provided at the center. A template 5 is provided.

  The first mold 1 includes two (plural) first inserts 6 mounted in the first template 5 at symmetrical positions with the spool 4 interposed therebetween, and the first inserts. 6 (two or more) movable first core pins 7 that are attached to each of the first and second lens forming concave portions, and are connected to the spool 4 and reach the first core pin 7. 1 has a runner 8 provided on the lower surface of the template 5 and the first insert 6.

  The runner 8 provided in the first nesting 6 positioned around the first core pin 7 is provided with a recess for forming a lens frame, which is not shown here. Although not shown here, the core pin 7 is biased by a biasing member in a direction opposite to the runner 8 side or is prevented from being detached.

  The lower second mold 11 on the movable side includes a second mounting plate 12, a spacer plate 13 having a hollow portion 13a attached to the upper portion of the second mounting plate 12, and the spacer. A second receiving plate 14 mounted on the plate 13 and having a hole 14a provided in the central portion and a pair of recesses 14b provided on both sides of the hole 14a, and an upper portion of the second receiving plate 14 It has the 2nd template 15 arrange | positioned and provided with the hole 15a in the center part.

  In addition, the second mold 11 has two (plural) second inserts 16 mounted in the second template 15 at symmetrical positions across the hole 15a, and the second inserts. Two (a plurality of) movable second core pins 17 attached to each of the sixteen and provided with a concave portion for forming a lens on the upper side, and the second template 15 in a state reaching the second core pins 17. And a runner 18 provided on the upper surface of the second insert 16.

  The runner 18 provided in the second nesting 16 positioned around the second core pin 17 is provided with a recess for forming a lens frame, which is not shown here. Although not shown in the figure, the core pin 17 is biased by a biasing member in the direction opposite to the runner 18 side or is prevented from coming off.

  Further, the second mold 11 has a protruding plate 19 movably provided in the cavity 13 a of the spacer plate 13 and a plurality of protruding pins 20 attached to the protruding plate 19. One of the two pins 20 is movably disposed in the holes 14a and 15a, and the other protruding pin 20 passes through the second receiving plate 14 and the second nesting 16, and the protruding pin 20 The molded lens R is discharged out of the second mold 11.

  In the above embodiment, the first mold 1 is the fixed side and the second mold 11 is the movable side. However, the first mold 1 is the movable side and the second mold 11 is. May be on the fixed side, and both the first and second molds 1 and 11 may be on the movable side.

  The first and second molds 1 and 11 having such a configuration move the second mold 11, and when the first and second molds 1 and 11 are combined, A lens cavity is formed between the two core pins 7 and 17, and the runners 8 and 18 are also combined.

  The adjusting means 21 for moving the first and second core pins 7 and 17 includes an adjusting member 22 and a spacer member 23 that is movable by the adjusting member 22. The adjusting member 22 includes a screw portion 22a, The adjustment member 22b is coupled to the screw portion 22a. The spacer member 23 includes a pair of base portions 23a, a movable body 23b provided between the pair of base portions 23a, and the base portion 23a. The body 23b is connected and has an elastic beam portion 23c that can be elastically deformed.

  In this adjusting means 21, the spacer member 23 is housed in the recesses 3 b and 14 b of the first and second receiving plates 3 and 14, and the movable body 23 b contacts the end portions of the first and second core pins 7 and 17. The screw portion 22a is screwed into the screw holes of the first and second receiving plates 3 and 14 in a state where the adjusting portion 22b of the adjusting member 22 protrudes in the lateral direction outside the first and second molds 1 and 11. Screwed into.

  When the adjusting portion 22b is rotated in the screwing direction, the base portion 23a of the spacer member 23 is pressed and moved by the screwed screw portion 22a. Then, the movable body 23b is moved into the first and second directions by the elasticity of the elastic beam portion 23c. The first and second core pins 7 and 17 are moved to the mating surface side of the first and second molds 1 and 11 by the movable body 23b. As a result, the thickness of the lens cavity is reduced and the lens thickness is adjusted to be reduced.

  Further, when the adjustment portion 22b is rotated in the direction of unscrewing, the base portion 23a is moved by the elastic beam portion 23c so as to follow the screw portion 22a unscrewed. Since the body 23b is movable in the direction opposite to the mating surface side of the first and second molds 1 and 11, the first and second core pins 7 and 17 are moved by the movable body 23b. , 11 in the opposite direction to the mating surface side, and as a result, the thickness of the lens cavity is increased and the lens thickness is adjusted to be increased.

  In the above embodiment, the lens thickness is small when the screw portion 22a is screwed and the lens thickness is large when the screw portion 22a is screwed back. However, when the screw portion 22a is screwed, The lens thickness may be large and the lens thickness may be reduced when the screw portion 22a is unscrewed.

  In the lens molding die apparatus of the present invention having such a configuration, first, the second mold 11 is moved, the first and second molds 1 and 11 are combined, and the first and second molds are combined. After the lens cavity is formed between the core pins 7 and 17 and the runners 8 and 18 are also combined, when the molten lens forming material (for example, plastic) flows from the spool 4, the lens forming material becomes the runner 8. , 18 and then flows into the lens cavity formed between the first and second core pins 7 and 17, and the lens R is formed.

  At this time, a pressing force is applied to the core pins 7 and 17 by the lens molding material. However, in the case of a configuration in which an urging action by the pressing force is utilized, the urging member can be omitted. Then, after molding, the second mold 11 is moved to release the first and second molds 1, 11, and then the protruding plate 19 is moved to move the lens R to the second position by the protruding pin 20. When discharged from the mold 11, a plurality of lenses R are molded.

  When adjusting the lens thickness, as described above, the lens thickness is increased or decreased by turning the adjusting portion 22b of the adjusting means 21 protruding outside the first and second molds 1 and 11. Adjust to

  In adjusting the lens thickness, one of the first and second core pins 7 and 17 may be moved.

  FIG. 5 shows another embodiment of the lens molding die apparatus according to the present invention. In this embodiment, the screw portion 22a of the adjustment member 22 is hooked on the base portion 23a of the spacer member 23, and the first, The heads 7a and 17a provided on the second core pins 7 and 17 are hooked on the movable body 23b, whereby the biasing members for biasing the first and second core pins 7 and 17 are provided. Other configurations are the same as those in the above-described embodiment, and the same parts are denoted by the same reference numerals, and the description thereof is omitted here.

It is principal part sectional drawing concerning the lens shaping die apparatus of this invention. It is a top view which shows the two adjustment means in connection with the lens shaping die apparatus of this invention. It is a principal part sectional view which shows the adjustment means concerning the lens shaping die apparatus of this invention. It is a top view of the principal part which concerns on the lens shaping die apparatus of this invention and shows an adjustment means. It is a principal part sectional drawing which concerns on the lens shaping die apparatus of this invention and shows other embodiment of an adjustment means. It is principal part sectional drawing concerning the conventional lens shaping die apparatus. It is an expanded sectional view of the principal part concerning the conventional lens shaping die apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st metal mold | die 2 1st mounting plate 2a Hole 3 1st receiving plate 3a Hole 3b Recessed part 4 Spool 5 1st type plate 6 1st nesting 7 1st core pin 7a Head 8 Runner 11 2nd 12 Second mounting plate 13 Spacer member 13a Cavity 14 Second receiving plate 14a Hole 14b Recess 15 Second mold plate 15a Hole 16 Second insert 17 Second core pin 17a Head 18 Runner 19 Projection Plate 20 Extrusion pin 21 Adjustment means 22 Adjustment member 22a Screw part 22b Adjustment part 23 Spacer member 23a Base part 23b Movable body 23c Elastic beam part R Lens

Claims (5)

First and second molds that are movable at least on one side, and first and second core pins that are held by the first and second molds and form lens cavities, respectively. The lens molding die apparatus is characterized in that at least one of the first and second molds is provided with adjusting means for adjusting the thickness of the lens by moving the core pin. . 2. The lens molding die apparatus according to claim 1, wherein the adjusting means is provided in the first and second molds, and the first and second core pins are movable by the adjusting means. . Each of the first and second molds is provided with a plurality of the first and second core pins for forming a plurality of the lens cavities so that a plurality of lenses can be molded. The lens molding die apparatus according to claim 1 or 2. The adjustment means includes an adjustment member that protrudes out of the mold while being held by the mold, and a spacer member that is held by the mold and that moves the core pin by receiving power from the adjustment member. The lens molding die device according to claim 1, wherein the lens molding die device is provided. The adjustment member includes a screw portion screwed into the mold, an adjustment portion coupled to the screw portion and protruding outside the mold, and the spacer member includes a movable body that contacts the core pin; An elastic beam portion coupled to the movable body and elastically deformable, and a base portion that is movable by the screw portion and follows the movement of the screw portion by the elastic beam portion, and the screw portion is screwed. 5. The lens molding die apparatus according to claim 4, wherein when the screw is unscrewed, the movable body moves through the elastic beam portion to move the core pin.

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