JP2015215535A - Spectacle member and production method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spectacle member in which plural different kinds of resin materials can be jointed firmly without peeling, and a production method thereof.SOLUTION: A modern 1 is formed by jointing and integrating end parts 10, 11 which are first parts molded by a first resin material, and a body part 12 which is a second part molded by a second resin material different from the first resin material. The end parts 10, 11 have an engagement hole extending inward from a joint surface with the body part 12, the second resin material is continuously filled in the engagement hole from the body part 12, and the engagement hole has a narrower gap than intervals of the joint surface side and an opposite side of the joint surface, by a projection which is formed inward in an inner peripheral surface.

Description

  The present invention relates to an eyeglass member such as a temple or modern used for an eyeglass frame and a method for manufacturing the eyeglass member.

  A spectacle frame is attached to a lens holding member such as a lens frame holding the whole or a part of a lens or a connecting body holding the frame without a frame like a two-point type, and a temple is rotatably attached via a hinge. Is configured to fold. The temple is attached with modern as an ear hook if necessary.

  These spectacle members that make up the spectacle frame are formed by processing metal materials and resin materials, and various types have been developed and put into practical use in consideration of functionality such as design, weight reduction, elasticity and flexibility. It is becoming. In the molding process of a resin material, a composite molding process in which a plurality of types of resin materials are combined is performed. For example, in Patent Document 1, a modern sheath includes a resin sheath and an elastic pad disposed at least in a portion facing the ear of the sheath, and the sheath and the pad of different materials are formed by double molding. An integrated modern for temples is described. Moreover, in patent document 2, the intermediate resin coating part is formed by performing the first injection molding in the intermediate part of the covering part which should be resin-coated of the temple rod, and the front and back parts of the covering part are formed on the mold. It describes that a resin-coated temple is manufactured by placing it in a mold hole and performing second injection molding on the mold hole.

  In such a composite molding process, when forming a complicated three-dimensional shape, a primary molding die and a secondary molding die are used, and an intermediate molded part is formed by a primary molding die using a single resin material. A molding method in which an intermediate molded part is molded and a final molded product is obtained using another resin material by incorporating the intermediate molded part into a secondary molding die is used.

JP 11-271690 A JP 2004-351794 A

  In the above-described composite molding process, since different types of resin materials are combined and molded, there is a problem that when the characteristics of the resin materials are different, the joint portion between the two is separated in the state of the molded product. Therefore, it is necessary to combine resin materials having similar characteristics, and the type of resin material to be used is restricted.

  In addition, when molding into a complicated shape, the shrinkage characteristics differ depending on the part of each molding part of the resin material, so that the joint part is easily peeled off. In addition, when used for eyeglass members, the resin material deforms due to the effects of sweat attached during use and the effects of solar radiation. It becomes.

  Then, an object of this invention is to provide the spectacles member which can be firmly joined, without peeling several different types of resin materials, and its manufacturing method.

  An eyeglass member according to the present invention is an eyeglass member in which a first part molded from a first resin material and a second part molded from a second resin material different from the first resin material are joined together. The first portion is formed with an insertion hole extending inwardly from a joint surface with the second portion, and the second resin material is continuous from the second portion in the insertion hole. The gap is set to be narrower than the gap on the joint surface side and the opposite side to the joint surface by the protrusions formed inward on the inner peripheral surface. Furthermore, the protrusion is formed in a fitting groove formed on the inner peripheral surface of the fitting hole. Further, a communication path is formed in the first part continuously to the insertion hole, and the communication path is formed so as to communicate with an opening formed on an outer surface of the first part. .

  The method for manufacturing a spectacle member according to the present invention includes a primary molding step of molding a first portion by three-dimensional modeling using a first resin material, and the first portion molded by the primary molding step is set in a mold. And a second molding step of injection-molding a second part to be joined and integrated with the first part by filling the mold with the second resin material. Further, in the primary molding step, a fitting hole extending inwardly from the joint surface with the second part is formed in the first part, and a protrusion is formed inward on the inner peripheral surface of the fitting hole. Thus, the interval is set to be narrower than the interval on the joining surface side and the opposite side to the joining surface.

  By having the above-described configuration, the present invention can firmly bond different types of resin materials without peeling.

It is the top view and front view regarding modern. It is the side view which expands and shows the structure of the edge part 10, AA sectional drawing of planar view, and BB sectional drawing of front view. It is the side view which expands and shows the structure of the edge part 11, CC sectional drawing of planar view, and DD sectional drawing of front view. It is explanatory drawing regarding a primary shaping | molding process. It is explanatory drawing regarding a secondary shaping | molding process.

  Hereinafter, embodiments according to the present invention will be described in detail. The embodiments described below are preferable specific examples for carrying out the present invention, and thus various technical limitations are made. However, the present invention is particularly limited in the following description. Unless otherwise specified, the present invention is not limited to these forms.

  FIG. 1 is a plan view (FIG. 1 (a)) and a front view (FIG. 1 (b)) relating to a modern 1 which is a spectacle member according to the present invention. The modern 1 is configured by joining a plurality of types of resin materials. In this example, the end portions 10 and 11 on both sides in the longitudinal direction are formed of the first resin material, and the main body portion 12 is the first resin. The second resin material different from the material is molded and joined. One end portion 11 is a root portion inserted into the temple 2, and the other end portion 10 is a tip portion. An insertion hole 13 into which the rod-shaped mounting portion 20 of the temple 2 is inserted along the longitudinal direction is formed inside the modern 1, and the insertion hole 13 is formed through the end portion 11 and the main body portion 12. The end 10 is formed in a concave shape without penetrating the tip.

  2 is an enlarged side view showing the structure of the end portion 10 (FIG. 2A), a sectional view taken along the line AA (FIG. 2B), and a sectional view taken along the line BB (FIG. 2). 2 (c)). The end portion 10 is formed with an insertion hole 10a extending inwardly from the joint surface 10b with the main body portion 12 toward the distal end side. The second resin material constituting the main body portion 12 is formed in the insertion hole 10a. And the tip of the insertion hole 13 is formed in a concave shape inside the second resin material. The joint surface 10b is formed in a shape in which the central portion protrudes, so that the joint area between the joint portion 10b and the main body portion 12 is increased, and the first resin material of the end portion 10 is sandwiched between the second resin materials of the main body portion 12. Therefore, the joint portion between the two is difficult to peel off.

  A pair of fitting grooves 10c are formed at the opposing positions on the inner peripheral surface of the fitting hole 10a so as to cut out outward. The fitting groove 10c is formed with a predetermined width from the joint surface 10b toward the tip side, and a protrusion 10d protruding inward is formed on the bottom surface of the fitting groove 10c. For this reason, the distance between the opposing bottom surfaces of the pair of fitting grooves 10c is set such that the distance between the pair of protrusions 10d is narrower than the distance between the joint surface 10b side and the tip side. And the 2nd resin material of the main-body part 12 comes to be filled in the fitting groove 10c.

  A communication path 10e is formed continuously from the insertion hole 10a toward the tip, and the communication path 10e is formed so as to communicate with a pair of openings 10f formed on the outer surface of the end portion 10. . The pair of openings 10f are formed at positions facing each other on the outer surface, and the direction in which the opening 10f communicates is set in a direction substantially orthogonal to the direction of the communication path 10e and the fitting grooves 10c arranged to face each other. Is set in a direction substantially orthogonal to the arrangement direction. And the space | gap from the communicating path 10e to the opening 10f is filled with the 2nd resin material of the main-body part 12 continuously from the insertion hole 10a.

  As described above, since the end portion 10 is continuously filled with the second resin material from the main body portion 12 and joined to the internal space, the end portion 10 is peeled off from the main body portion 12. It comes to join firmly without. That is, since the resin portion of the main body portion 12 filled in the insertion hole 10a has a narrow width between the pair of protrusions 10d in the fitting groove 10c, the end portion 10 is moved from the main body portion 12 to the front end side. With respect to the deformation in the direction of pulling away, the resin portion of the main body portion 12 is engaged with the protrusion 10d and the strength can be increased. In addition, the resin portion of the main body portion 12 filled from the communication passage 10e to the opening 10f has a communication direction of the pair of openings 10f with respect to deformation in which the end portion 10 is rotated so as to be twisted with respect to the main body portion 12. Since the direction is set substantially perpendicular to the rotation axis, the strength against such deformation can be increased. In addition, the resin portion filled in the communication path 10e extends from the main body 12 even when the end portion 10 is bent from the main body 12, so that the strength can be increased against such deformation. Can do. Therefore, the strength against various deformations applied to the end portion 10 is increased, and the end portion 10 can be prevented from peeling off from the main body portion 12. In the example described above, a pair of openings 10f is formed, but only one opening may be provided.

  3 is an enlarged side view showing the structure of the end portion 11 (FIG. 3B), a cross-sectional view taken along the line CC (FIG. 3B), and a cross-sectional view taken along the line DD (FIG. 3). 3 (c)). The end portion 11 is formed with an insertion hole 11a extending inwardly from the joint surface 11b with the main body portion 12 toward the opposite side of the main body portion 12, and a communication path 11e is continuously formed from the insertion hole 11a. Penetrated. The insertion hole 11a is filled with the second resin material constituting the main body portion 12, and an insertion hole 13 is formed inside the second resin material to communicate with the communication path 11e, and the mounting portion 20 of the temple 2 is inserted. It has become so.

  A pair of fitting grooves 11c are formed so as to be cut out outward at positions facing the inner peripheral surface of the fitting hole 11a. The fitting groove 11c is formed with a predetermined width from the joint surface 11b toward the side opposite to the main body portion 12, and a protrusion 11d protruding inward is formed on the bottom surface of the fitting groove 11c. Yes. Therefore, the gap between the opposing bottom surfaces of the pair of fitting grooves 11c is set so that the gap between the pair of protrusions 11d is narrower than the gap between the joint surface 11b side and the opposite side. And the 2nd resin material of the main-body part 12 comes to be filled in the fitting groove 11c.

  Since the end portion 11 has the temple 2 mounting portion 20 penetrating through the internal space and the fitting hole 11a is continuously filled with the second resin material from the main body portion 12 and joined to the main body portion 12. Thus, the end portion 11 can be firmly joined without peeling off. That is, since the resin portion of the main body portion 12 filled in the insertion hole 11a has a narrow width between the pair of protrusions 11d in the fitting groove 11c, the end portion 11 is moved from the main body portion 12 to the front end side. With respect to the deformation in the direction of pulling apart, the resin portion of the main body portion 12 is engaged with the protrusion 11d and the strength can be increased. Moreover, since the mounting part 20 is penetrated in the end part 11, it has sufficient intensity | strength also with respect to the deformation | transformation which twists or bends the end part 11. FIG.

  In the example described above, modern is described as an example of the spectacle member, but the present invention can also be applied to spectacle members such as temples and front frames other than modern. Moreover, it is also possible to constitute a spectacle member in which three or more kinds of resin materials are joined, and the resin material can be joined at portions other than the end portions, and is not particularly limited.

  4 and 5 are explanatory diagrams relating to a process of manufacturing the modern 1. First, in FIG. 4, it is a primary molding process which shape | molds the components used as the edge parts 10 and 11 with a three-dimensional modeling apparatus with a 1st resin material. FIG. 5 shows a secondary molding process in which the end portions 10 and 11 obtained in the primary molding process are set in a mold, the mold is filled with a second resin material, and injection molding is performed. The end portions 10 and 11 have a shape in which the internal structure is difficult to be molded by injection molding, but the entire modern 1 is formed by forming the internal structure of the parts to be the end portions 10 and 11 by a three-dimensional modeling apparatus. The injection molding in the secondary molding process of molding can be performed reliably. In particular, it is technically difficult to form the protrusion shape in the fitting groove of the end portions 10 and 11 and the shape of the opening 10f of the end portion 10 by injection molding, but it is accurate by forming by three-dimensional modeling. And it becomes possible to shape | mold easily.

  In the primary forming step, the object is formed by the additive manufacturing method based on the three-dimensional CAD data of the parts to be the end portions 10 and 11. In the example shown in FIG. 4, the liquefied first resin material R <b> 1 is ejected by the ink jet recording head 30 and cured in a layered manner to form a laminate. The ink jet recording head 30 includes a head 31 that discharges a first resin material R1 made of a liquid photocurable resin material that molds the component M, and a liquid photocurable resin material that molds a support material S that supports the component to be molded. And a light irradiation unit 33 for curing the discharged photocurable resin material. The ink jet recording head 30 moves in the X direction and the Y direction, which are scanning directions, and discharges a photocurable resin material.

  The stacking table 40 arranged to face the ink jet recording head 30 is moved by the moving device 41 in the Z direction which is the stacking direction. The control device 50 creates recording data of a two-dimensional shape obtained by slicing the three-dimensional shape to a predetermined thickness based on the CAD data of the part, and transmits a recording signal to the inkjet recording head 30. Then, the ink jet recording head 30 discharges and cures the first resin material R1 to the layered table 40 in a layered two-dimensional shape based on the recording signal. After forming to a predetermined thickness, the control device 50 drives and controls the moving device 41 to move the stacking table 40 in the Z direction by a predetermined thickness. Thus, by laminating a resin layer having a predetermined thickness on the lamination table 40, a plurality of parts M are modeled together with the support material S. The support material S is formed to support the portion of the component M that protrudes in the X direction and the Y direction, so that the component M can be formed stably and accurately.

  After the three-dimensional modeling, the support material S is removed from the part M, and the outer surface of the part M is cut to finish the surface shape.

  The first resin material R1 is preferably a material that can be three-dimensionally molded and has good fusibility with the second resin material R2 used in the secondary molding process described later. For example, an acrylic or polypropylene photosensitive resin. Materials can be used. As the three-dimensional modeling apparatus described above, it is possible to use an apparatus based on a known modeling method such as a powder method, an optical modeling method, a sheet laminating method, an extrusion method, etc. in addition to the ink jet recording method.

  In the secondary molding process, as shown in FIG. 5A, the three-dimensionally molded part is set on the lower mold 60. A core body 61 having the same shape as the mounting portion 20 of the temple 2 is inserted and set in the parts to be the end portions 10 and 11. Next, as shown in FIG. 5 (b), the upper mold 63 is placed in alignment with the lower mold 60, the liquid second resin material R2 is filled in the mold, and the modern 1 is molded by injection molding. In this example, an injection port (not shown) of a resin material is formed at a position on the fitting hole side of the part to be the end portion 10, so that the joint surface between the end portion 10 and the main body portion 12 is heat-sealed. Can be ensured.

  Since the internal structure of the component which becomes the end portion 10 communicates with the outside from the insertion hole 10a to the opening 10f, the second resin material R2 can be filled inside without a gap. In addition, since the internal structure of the component that becomes the end portion 11 communicates with the outside so as to penetrate through the rod-like body 61, the inside can be filled with the second resin material R2 without a gap. Therefore, the main body part 12 joined to the end parts 10 and 11 without gaps can be formed, and the second resin material R2 is continuously filled from the main body part 12 into the internal structure of the end parts 10 and 11. Thus, the end portions 10 and 11 are firmly bonded to the main body portion 12 without peeling off. After the secondary molding, the molded product is taken out from the mold and the core body 61 is pulled out, so that the end portions 10 and 11 made of different resin materials are joined to both ends of the main body portion 12 and the insertion hole 13 is formed inside. You can get modern.

  Examples of the second resin material R2 include polyester-based thermoplastic elastomers excellent in heat-fusibility, styrene-based thermoplastic elastomers, polyamide resin materials, and the like. Such a resin material is excellent in light resistance and corrosion resistance (particularly durability against sweat), and is suitable for a spectacle member. In addition, in order to strengthen the bonding between the end portions 10 and 11 and the main body portion 12, a primer that bonds and bridges both resin materials can also be used. When using a primer, the primer may be attached in advance to the joint surface of the component set in the mold, and injection molding may be performed.

  As the first resin material of the end portions 10 and 11, a polypropylene-based photosensitive resin material or an acrylic-based photosensitive resin material (Stratasys) is used, and as shown in FIG. Were subjected to primary molding to obtain a part. The obtained part is set in a mold as shown in FIG. 5 and injection molding is performed using a polyester-based thermoplastic elastomer (manufactured by Mitsubishi Chemical Corporation) as a second resin material to obtain a modern spectacle member. It was.

  It is confirmed that the joined surface of the body part and the end part of the obtained spectacle member is joined with a resin material without a gap, and the inside of the end part is filled with the second resin material and firmly joined. did it. An artificial sweat test (based on JIS B 7285 8.2 (2008)) was performed on the obtained eyeglass member. Put the test solution (lactic acid 5%, sodium chloride 10%, distilled water 85%) into a sealed container, place the eyeglass member above the test solution surface to make it sealed, and set the test temperature at 55 ° C to 24 After a lapse of time, the state of the eyeglass member was visually confirmed. No abnormality occurred on the surface of the spectacle member, and the state was the same as before the test, and the bonding surface between the main body and the end was firmly bonded without generating a gap.

  Further, a light resistance test (based on JIS B7753) was performed on the spectacle member. Using a sunshine super long weather meter (manufactured by Suga Test Instruments Co., Ltd.), the black panel temperature was set to 63 ° C., the temperature setting was set to 45 ° C., and the humidity was set to 45 to 55%, and irradiation was performed for 150 hours. When the eyeglass member after irradiation was visually confirmed, no deformation or peeling of the joint surface was observed compared to before the test.

  From the above test results, it was confirmed that the eyeglass member in which a plurality of types of resin materials were joined maintained the state in which the resin materials were firmly joined without being peeled even in use.

DESCRIPTION OF SYMBOLS 1 ... Modern, 2 ... Temple, 10 ... End part, 10a ... Insertion hole, 10b ... Joining surface, 10c ... Fitting groove, 10d ... Projection, 11 ... -End part, 11a ... insertion hole, 11b ... joint surface, 11c ... fitting groove, 11d ... projection, 12 ... main body part, 13 ... insertion hole, 20 ... Wearing part

Claims (5)

  A first member molded with a first resin material and a second member molded with a second resin material different from the first resin material are joined together, and the first portion includes: An insertion hole extending inward from the joint surface with the second portion is formed, and the insertion hole is continuously filled with the second resin material from the second portion and has an inner periphery. A spectacle member in which the interval is set to be narrower than the interval on the bonding surface side and the opposite side to the bonding surface by a protrusion formed inward on the surface.   The spectacle member according to claim 1, wherein the protrusion is formed in a fitting groove formed on an inner peripheral surface of the fitting hole.   The communication path is formed continuously inside the first portion with the insertion hole, and the communication path is formed so as to communicate with an opening formed in an outer surface of the first portion. The spectacle member according to 1 or 2.   A primary molding step of molding the first portion by three-dimensional modeling using the first resin material, and the first portion molded by the primary molding step is set in a mold, and the second resin material is placed in the mold. And a secondary molding step of injection-molding a second part that is joined and integrated with the first part by filling.   In the primary molding step, an insertion hole extending inwardly from the joint surface with the second part is formed in the first part, and a protrusion is formed inward on the inner peripheral surface of the insertion hole. The method for molding a spectacle member according to claim 4, wherein the interval is set to be narrower than the interval on the bonding surface side and the opposite side to the bonding surface.

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