JP2008284767A - Resin molding, method for producing the same, and mold for producing resin molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form seal materials 19 and 21 penetrated by an operation shaft 14 and a coupler 18 which are installed in the casing 8 of a mirror angle adjustment mechanism 4 to be fitted to a door mirror 1 by injecting a resin material into the casing 8. <P>SOLUTION: While molds X and Y which mold-formed the casing 8 by primary injection are clamped, child molds X1-X3 and Y1-Y4 installed in each of the molds X and Y are moved properly to form seal material forming spaces S1 and S2, and the resin material is injected into the spaces to form the seal materials 19 and 21. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention belongs to the technical field of a resin molded body used in a casing having a drive mechanism for adjusting the angle of a mirror body of an electric door mirror, a manufacturing method thereof, and a mold for manufacturing a resin molded body. It is.

In general, some of these types of hollow casings are fitted with various parts such as operating shafts and terminals linked to the output shaft of the drive motor or lead wires and couplers. There is known a structure in which a waterproof sealing function (packing) is assembled so that water (rain water or washing water) does not enter the casing from the penetrating portion so as to exhibit a waterproof function (for example, Patent Document 1, 2).
JP 2001-294091 A JP 2001-334871 A

  However, in the above-mentioned conventional one, the casing and the sealing material are manufactured separately, and the sealing material is incorporated into the casing in accordance with the process of incorporating various parts such as a motor. , Not only is the work of assembling the seal material troublesome, but the workability is also poor, and since the seal material is a separate assembly, it needs to be easy to incorporate, there is a problem of poor adhesion and poor waterproofing, Here is the problem to be solved by the present invention.

The present invention was created in view of the above-described circumstances in order to solve these problems, and the invention of claim 1 is characterized in that a through-hole is formed in an injection molded body that is molded by injection. The molded part side through hole is provided with a first part made of a material different from that of the injection molded part in a state where the through hole is formed, and the part side through hole is incorporated so as to penetrate the second part. In the resin molded body, the first part is moved in a state in which the molds are clamped together in order to mold the injection molded body by primary injection. A resin molded body is provided by forming a space for forming a first part and injecting a resin material for the first part into the space.
The invention according to claim 2 is the resin molded body according to claim 1, wherein the first part is a sealing material.
According to a third aspect of the present invention, a through hole is formed in an injection molded body molded by injection, and a first part made of a material different from the injection molded body is formed in the through body through hole. When manufacturing a resin molded body that is configured to be installed in the component side through hole so as to penetrate the second component, the first component is subjected to primary injection by clamping the molds together. Then, after the mold is formed, a space for forming the first part is formed by moving the child mold provided corresponding to the shape of the first part in the state in which the clamped state is maintained. It is a method for producing a resin molded body, which is provided by injecting a resin material for a first part.
The invention according to claim 4 is the method for producing a resin molded body according to claim 3, wherein the first part is a sealing material.
According to the invention of claim 5, the second part is assembled into the first part by placing the molds so that the injection molded body formed by the primary injection remains in one mold and is die-cut from the other mold. In a separated state, the mold for molding the first part of one mold is retracted to form a space for penetrating and incorporating the second part into one mold, and then the mold of the injection molded body The method for producing a resin molded body according to claim 3 or 4, wherein the second part is penetrated and incorporated into the first part from the extracted surface side.
According to the sixth aspect of the present invention, the second injection molded body is molded at the same time as the molding of the first injection molded body, and the second part is provided on the first part provided by injection molding on at least one of the injection molded bodies. 6. The resin molding according to claim 5, wherein after the parts are assembled, the first and second injection molded bodies are brought into contact with each other, and a resin material is secondarily injected to the abutting surface portion to be integrated. It is a manufacturing method of a body.
According to the seventh aspect of the present invention, a through hole is formed in an injection molded body molded by injection, and a first part made of a material different from the injection molded body is formed in the molded body side through hole. A mold having a mold surface for manufacturing a resin molded body that is provided and incorporated in the component-side through hole so as to penetrate the second component, the mold including an injection molded body In a state where the mold is clamped to mold, the first part corresponding space is closed in the molding process of the injection molded body, and the mold is moved to form the first part corresponding space in the first part molding process. A mold for producing a resin molded body, wherein a mold is provided.
The invention according to claim 8 is set so that when the molds are separated from each other, the injection molded body molded by the primary injection remains in one mold and is removed from the other mold. The first part molding die provided in one mold is set to be movable so as to form a space for penetrating and incorporating the second part in one mold. A mold for producing a resin molded body according to claim 7.

By incorporating the first part into the through-hole of the injection-molded body according to the invention of claim 1 or 3, the first part is formed by injection-molding the first part of the injection-molded body by primary injection. This is not only simple, but also has good adhesion using the injection pressure for injecting the first part.
According to the invention of claim 2 or 4, the sealing material can be provided on the injection-molded body using the injection pressure, the sealing property is excellent, and a high waterproof function can be exhibited.
By setting it as invention of Claim 5, incorporation into a 1st part of a 2nd part can be performed in a series of manufacturing processes for manufacturing a resin molding, and workability | operativity improves.
By manufacturing the resin molded body by abutting the first and second injection molded bodies against each other and producing a resin molded body, the second part is assembled to the first part in a penetrating manner. Is easy to do.
By setting it as invention of Claim 7, the metal mold | die for providing a 1st component in the injection molded body in which primary injection is carried out can be provided.
By setting it as invention of Claim 8, the metal mold | die for incorporating a 2nd component in a 1st component can be provided.

  Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a door mirror. The door mirror 1 includes a housing (mirror housing) 2 serving as an outer casing and an electric mirror angle adjusting mechanism 4 for adjusting the angle of a mirror plate (mirror body) 3. As in the prior art, the bracket angle adjustment mechanism 4 is provided with a bracket 5 and an electric storage mechanism 6 for storing the door mirror 1.

  The mirror angle adjusting mechanism 4 includes first and second casings 7 and 8 that are abutted in front and rear (front and back) pairs. Inside the casings 7 and 8, a mirror on which the mirror plate 3 is supported. A motor 10 and 11 for adjusting the mirror angle that swings the holder 9 in the left and right directions and the up and down direction, and worm wheels 12 and 13 that rotate based on driving of the motors 10 and 11 are accommodated. , 11 through the rotation of the worm wheels 12 and 13 based on the forward / reverse driving, the operating shafts 14 and 15 are supported by penetrating so as to protrude and retract relative to the rear casing 8 respectively. Further, the rear casing 8 is provided with a ball joint 16, and a joint portion 9 a of the mirror holder 9 is supported by the ball joint 16 so as to be swingable in three directions in the vertical and horizontal directions. The mirror holder 9 is connected to the tip end portions of the operating shafts 14, 15. In such a configuration, the motor 10, 11 is driven forward / reversely so that the mirror holder 9 is connected to the joint center of the ball joint 16. As a fulcrum, the mirror plate 3 can be adjusted in the vertical and horizontal directions, and this configuration is also conventionally known.

  The projecting portions of the operating shafts 14 and 15 from the casing 8 and the projecting portions of the coupler 18 from the casing 8 are provided with sealing materials 19, 20, and 21 formed of a flexible material. , 20, 21 are formed in the present invention, and the configuration and manufacturing method thereof will be described in detail below.

  First, the first and second casings 7 and 8 are molded by resin injection, respectively, and then abutted against each other, and are integrated by secondary injection of the resin material 22 to the abutting part. In the present embodiment, the sealing materials 19, 20, and 21 are integrally formed in the second casing 8 by injection molding a flexible resin material in an intermediate injection process between the primary and secondary injection processes. The Incidentally, since the operating shaft 15 has the same shape as the operating shaft 14 and the sealing material 20 has the same shape as the sealing material 19, the description of the operating shaft 14 and the sealing material 19 will be substituted for the operating shaft 15 and the sealing material 20. I will omit it. The second casing 8 is formed with through-holes 8a and 8b for forming the sealing materials 19 and 21, but the through-hole 8a for penetrating and incorporating the columnar operating shaft 14 has a circular shape. The through hole 8b for penetrating and incorporating the quadrangular columnar coupler 18 has a quadrangular shape. A sealing material 19 for sealing in the through holes 8a and 8b is formed in a lip shape on the inner peripheral surface of the cylindrical portion 19a and the cylindrical portion 19a formed on the inner peripheral surface of the through hole 8a. The lip portion 19b and the flange portion 19c formed on the outer edge surface portion of the through hole 8a are formed, and the sealing material 21 for incorporating the coupler 18 is formed on the inner peripheral surface of the through hole 8b. The cylindrical part 21a and the collar part 21b formed in the outer peripheral surface part of the through-hole 8b are formed.

  X and Y are molds, and the first mold X is a movable mold that moves away from and moves relative to the mold surface with respect to the second mold Y, and the second mold Y is fixed. By becoming a mold, the two molds X and Y are separated and moved in parallel, whereby the first and second injection steps are performed. Of course, they are relative and the direction of movement is not particularly limited. First, the movable mold X is formed with a convex mold surface x1 for forming the inner surface of the first casing 7 and a concave mold surface x2 for forming the outer surface of the second casing 8, while the fixed mold Y is formed. A concave surface y1 for forming the outer surface of the first sing 7 and a convex surface y2 for forming the inner surface of the second casing 8 are formed. The movable mold X is mold-matched (clamped) so that the convex surface x1 and the concave surface y1 are opposed to the concave surface x2 and the convex surface y2 to form the casings 7 and 8, respectively. Thus, the casings 7 and 8 are injection-formed by primary injection of the resin material (see FIG. 6A).

  In this case, the mold surfaces x2 and y2 of the molds X and Y for forming the second casing 8 are provided with child molds for forming the sealing materials 19 and 21. First, as shown in FIG. 7 (A), at the part where the sealing material 19 of the movable mold X is formed, the first child mold X1 for forming the outer surface of the lip portion 19b, and the bowl-shaped portion 19c. A second child mold X2 for forming an outer surface is provided. The first child mold X1 has a cylindrical shape, and a tip surface has a mountain shape corresponding to the outer surface shape of the lip portion 19b, and a central portion. The mold surface is flat. The second child mold X2 has a cylindrical shape slidably in contact with the outer peripheral surface of the first child mold X1, and the tip surface is a flat mold surface corresponding to the shape of the bowl-shaped portion 19c, and has an outer diameter. Is set to have a larger diameter than the through hole 8a. On the other hand, in the portion where the sealing material 19 of the fixed die Y is formed, the first child die Y1 for forming the inner surface of the lip portion 19b and the second child die for forming the cylindrical portion 19a. Y1 is provided, but the first die Y1 has a cylindrical shape, the tip surface has a mountain shape corresponding to the inner surface shape of the lip portion 19b, and the center portion has a flat surface. ing. The second child mold Y2 has a cylindrical shape that is in sliding contact with the outer peripheral surface of the first child mold Y1, and the distal end surface is a flat mold surface corresponding to the inner surface shape of the cylindrical portion 19a, and the outer mold surface is outside. The diameter is set to be the same diameter as the through hole 8a. The sub molds X1, X2, Y1, and Y2 are set so as to be relatively movable in the mold clamping direction of the molds X and Y by a moving mechanism (not shown).

  On the other hand, as shown in FIG. 7 (B), a third child mold X3 for forming the outer surface of the bowl-shaped portion 19c is provided at a portion where the sealing material 21 of the movable mold X is formed. The triplet mold X has a quadrangular prism shape in accordance with the shape of the coupler 18, the tip surface is a flat mold surface corresponding to the shape of the flange portion 21c, and the outer diameter is larger than that of the through hole 8b. It is set to be the diameter. On the other hand, in the portion where the sealing material 21 of the fixed die Y is formed, a third child die Y3 and a fourth child die Y4 for forming the inner surface of the cylindrical portion 21a are provided. The triplet mold Y3 has a quadrangular prism shape, and the outer diameter is set to be the inner diameter of the cylindrical portion 21a. Further, the fourth die Y4 has a rectangular tube shape that is in sliding contact with the outer peripheral surface of the third child die Y3, the tip surface is a flat die surface corresponding to the inner surface of the tubular portion 19a, and the outer die surface is external. The diameter is set to be the same diameter as the through hole 8b. The sub molds X3, X4, Y3, and Y4 are set so as to be relatively movable in the mold clamping direction of the molds X and Y by a moving mechanism (not shown).

  In the first injection step, these sub molds are in positions where the sealing materials 19 and 21 are not formed, that is, as shown in FIG. 7, the front end surfaces of the first sub molds X1 and Y1 come into contact with each other. The second child mold X2 is located at a position where the tip surface forms an outer peripheral surface around the through hole 8a of the casing 8, and the tip surface of the second child mold Y2 abuts against the tip surface of the second child mold X2. In addition, the third child mold X3 is located at a position where an inner peripheral surface around the through hole 8b of the casing 8 is formed, and the third and fourth child molds Y3 and Y4 have a tip end surface of the first. It is located at a position where it abuts against the tip surface of the triplet mold X3. In this state, a gap S1 is formed between the chevron surfaces between the first child molds X1 and Y1 between the child molds that abut each other, but this gap S1 is closed by the second child molds X2 and Y2. Therefore, the resin material for forming the casing 8 does not enter.

  Next, after the primary injection process is finished, as shown in FIG. 8, second molds X2 and Y2 for forming the sealing material 19 in a state where the molds X and Y are kept clamped. Are retracted to the corresponding inner and outer surface positions of the sealing material 19, while the third and fourth child molds X3 and Y4 for forming the sealing material 21 are moved to the corresponding inner and outer surface positions of the sealing material 21. Although the retreat movement is performed, the third child mold Y3 projects and moves so as to abut against the third child mold X3 in order to form the inner peripheral surface of the sealing material 21. When these child molds are moved, the mold spaces S2, 3 for forming the sealing materials 19, 21 are formed, and the sealing materials 19, 21 are injected by injecting a flexible resin material here. Is formed (see FIG. 9).

  After the sealing materials 19 and 21 are formed on the casing 8, the movable mold X is moved away from the fixed mold Y. At this time, the second casing 8 is disposed on the movable mold X side. Demolding (die cutting) is performed so that the first casing 7 remains on the Y side. Then, after the movable mold X moves in a direction along the mold surface so that the removed casings 7 and 8 face each other, the movable mold X abuts against the fixed mold Y and is clamped. Although the resin material 22 is secondarily injected into the space S4 formed in the abutting portion of the casing 7 and the casings 7 and 8 are integrated (see FIGS. 6 (B) to (D)), Parts housed in the casings 7 and 8 for constituting the mirror angle adjusting mechanism 4 such as the motors 10 and 11 during the steps from the separation movement after the primary injection to the abutting movement for the secondary injection. Is assembled by using, for example, a robot hand (see FIG. 6C). In this case, it is necessary to mount the operating shaft 14 and the coupler 18 in a state of penetrating the seal materials 19 and 21. There, as shown in FIGS. With respect to the movable mold X separated from the fixed mold Y, the first to third child molds X1 to X3 are retracted and the through spaces S5 and S6 are secured on the mold surface x2 side, from the inside of the casing 8. The operating shaft 14 and the coupler 18 are assembled so as to penetrate the sealing materials 19 and 21.

  In the embodiment of the present invention configured as described above, in manufacturing the mirror angle adjusting mechanism 4, the sealing members 19 and 21 for sealing around the operating shaft 14 and the coupler 18 penetratingly incorporated in the casing 8 are After the casing 8 is injection-molded, the molds X1 to X3 and Y1 to Y4 are moved as necessary, and the resin material is formed in the state where the spaces S1 and S2 for forming the sealing materials 19 and 21 are formed. The injection molding can be performed, and as a result, the sealing materials 19 and 21 can be formed following the molding of the casing 8 and the workability is improved. Moreover, since the sealing materials 19 and 21 are formed in a state where they are subjected to the injection pressure, the resin materials of the sealing materials 19 and 21 and the resin material of the casing 8 are not adhesive to each other and peel off. However, the contact surface is excellent in adhesion and can exhibit high waterproofness. Incidentally, when the resin materials having no adhesiveness are manufactured as described above, the casing 8 and the sealing materials 19 and 21 can be separately collected (separately collected), which can contribute to the regeneration of the resin material. Further, when resin materials having mutual adhesiveness are adopted, the casing 8 and the sealing materials 19 and 21 can be integrated, and the waterproof property can be further increased.

  Moreover, in this case, after the sealing materials 19 and 21 are formed, components such as the motor 10 are incorporated in the process before the secondary injection and the casings 7 and 8 are integrated. The through spaces S5 and S6 of the actuating shaft 14 and the coupler 18 are secured by the retreating movement of the child molds X1 to X3, and the actuating shaft 14 and the coupler 18 can be incorporated through in this state, thereby improving workability. .

Needless to say, the present invention is not limited to the above embodiment, and the penetrating parts are not limited to the operating shaft and the coupler, but may be various types such as terminals and lead wires. In the case of using a pair of injection molded bodies as in the casings 7 and 8 of the form, the penetrating parts are not limited to those incorporated in any one of the injection molded bodies, but may be incorporated in both injection molded bodies. Can be implemented.
Furthermore, in the above-described embodiment, the sealing material has been described as the first part. However, it is a matter of course that the sealing material is not limited to the sealing material, and the first part has a through hole formed in the injection molded body. Although the description has been given in the state of forming a bowl-shaped part larger than the through-hole, when a resin material having adhesiveness is used, the bowl-shaped part can be omitted. The first part can be configured to be flush with the first part, and when a resin material having no adhesiveness is used, it can be implemented even if the hook-shaped part is formed on both the inner and outer surfaces to prevent falling off. .

It is a horizontal sectional view of a door mirror. It is a front view of a mirror angle adjusting device. It is a front view of the 2nd casing of a mirror angle adjusting device. It is a cross-sectional side view of a mirror angle adjusting device. (A) and (B) are enlarged cross-sectional side views of main parts of the mirror angle adjusting device, respectively. (A)-(D) are schematic sectional drawings which show the manufacturing process of a mirror angle adjustment apparatus. (A) (B) is a manufacturing process figure which shows the seal | sticker part of a mirror angle adjustment apparatus. (A) (B) is a manufacturing process figure which shows the seal | sticker part of a mirror angle adjustment apparatus. (A) (B) is a manufacturing process figure which shows the seal | sticker part of a mirror angle adjustment apparatus. (A) (B) is a manufacturing process figure which shows the seal | sticker part of a mirror angle adjustment apparatus. (A) (B) is a manufacturing process figure which shows the seal | sticker part of a mirror angle adjustment apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door mirror 4 Mirror angle adjustment mechanism 7, 8 Casing 8a, 8b Through-hole 10, 11 Motor 14, 15 Actuation shaft 18 Coupler 19, 20 Seal material 22 Resin material X, Y Mold X1-X3 Child mold Y1-Y4 Child Mold

Claims (8)

  A through-hole is formed in an injection-molded body that is molded by injection, and a first part made of a material different from that of the injection-molded body is provided in the formed-body-side through-hole in a state where the through-hole is formed. In the resin molded body configured to penetrate the second part, the first part is in a state where the molds are clamped together in order to mold the injection molded body by primary injection. It is provided by forming a space for forming a first part by moving a child mold provided corresponding to the part shape and injecting a resin material for the first part into the space. Resin molded body.   The resin molded body according to claim 1, wherein the first part is a sealing material.   A through-hole is formed in an injection-molded body that is molded by injection, and a first part made of a material different from that of the injection-molded body is provided in the formed-body-side through-hole in a state where the through-hole is formed. In manufacturing a resin molded body configured to penetrate through the second part, the first part is mold-molded by first injecting the injection molded body by clamping the molds together, A space for forming the first part is formed by moving a child mold provided corresponding to the shape of the first part while maintaining the mold clamping state, and the resin material for the first part is formed in the space. A method for producing a resin molded body, which is provided by injecting a resin.   4. The method for producing a resin molded body according to claim 3, wherein the first part is a sealing material.   Assembling of the second part into the first part is performed in a state where the molds are separated from each other so that an injection molded body molded by primary injection remains in one mold and is removed from the other mold. After forming the space for inserting and inserting the second part into one mold, the first mold for molding the first part of the mold is retracted and moved from the die-cut surface side of the injection molded body. 5. The method for producing a resin molded body according to claim 3, wherein two parts are penetrated into the first part.   The second injection molded body shall be molded simultaneously with the molding of the first injection molded body, and after incorporating the second part into the first part provided by injection molding to at least one injection molded body, 6. The method for producing a resin molded body according to claim 5, wherein the first and second injection molded bodies are abutted against each other, and a resin material is secondarily injected to the abutting surface portion to be integrated.   A through-hole is formed in an injection-molded body that is molded by injection, and a first part made of a material different from that of the injection-molded body is provided in the formed-body-side through-hole in a state where the through-hole is formed. In addition, a mold having a mold surface for manufacturing a resin molded body configured so as to penetrate through the second part, the mold is clamped to mold an injection molded body In this state, the first part corresponding space is closed in the molding process of the injection molded body, and the die mold is moved to form the first part corresponding space in the first part molding process. A mold for producing a molded resin product.   The mold is set so that when the molds are separated from each other, an injection molded body molded by primary injection remains in one mold and is removed from the other mold. 8. The first part molding die provided in the mold is set to be movable so as to form a space for penetrating and incorporating the second part into one mold. A mold for producing the resin molded body as described.

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