JP3344323B2 - Two-color molding method for air conditioning register - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a resin air-conditioning register having a thick portion at least in a barrel by two-color injection molding .

[0002]

2. Description of the Related Art When it is necessary to mold one article from a plurality of resins or a plurality of resins of the same kind but having different color tones due to physical or design requirements, a two-color molding method is conventionally used. Have been. In this two-color molding method, first, a first resin is injected into a first cavity to form a first molded body, and then a second resin is injected into a second cavity adjacent to the first cavity to form a second molded body. Molding. Thereby, the first molded body and the second molded body are welded to each other, and an integrated two-color molded article is formed.

[0003] For example, an air-conditioning register of an automobile has a frame-shaped barrel having a plurality of horizontal deflecting plates formed with a blowing opening and being parallel to each other, and a parallel barrel arranged behind the horizontal deflecting plate and swingably mounted on the barrel. A plurality of vertical deflection plates. To manufacture such a register, first, a plurality of vertical deflection plates are formed of a first resin having a high melting point during the first molding. Next, in a state where some slide cores are changed in the same mold and the formed plurality of vertical deflection plates are arranged in the mold, a second resin which has a lower melting point than the first resin and is not bonded to the first resin. A resin is used to form a barrel for swingably holding the plurality of vertical deflection plates and a connecting rod for connecting the plurality of vertical deflection plates.

As a result, the plurality of vertical deflection plates are swingably held by the barrel, and the plurality of vertical deflection plates can swing in synchronization with each other by the connecting rod, so that the wind direction can be deflected in the left-right direction. . Further, by holding the barrel in an instrument panel at the outlet of the air conditioner so as to be vertically swingable, the wind direction can be vertically deflected by the horizontal deflection plate.

[0005] By utilizing the two-color molding method, a product having a movable portion can be integrally manufactured.
The number of man-hours can be significantly reduced.

[0006]

However, in the above-described air-conditioning register, the bottom of the barrel or the like may be thick due to design reasons. However, when such a thick portion is present when a frame such as a barrel is injection-molded, there is a problem that a concave sink mark is formed in the thick portion or the thick portion is deformed to warp.

[0007] The present invention has been made in view of such circumstances, and an object of the present invention is to prevent the occurrence of defects such as sink marks and deformation of a thick portion by using two-color molding. .

[0008]

The feature of the two-color molding method of the air-conditioning register according to the present invention which solves the above-mentioned problem is that the blowing is performed.
Frame shape with multiple horizontal deflection plates that form an opening and are parallel to each other
And swingably arranged on the barrel behind the horizontal deflection plate.
A plurality of vertical deflection plates parallel to each other
A two-color molding method for an air-conditioning register made of fat, comprising a barrel
Has a thick part at least in part, and the thick part extends in the thickness direction.
The divided part and the vertical deflection plate are molded with the first resin, and
The remaining part of the rear thick part and the horizontal deflection plate have a lower melting point than the first resin.
It is to mold with the second resin which does not fuse with the first resin .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a two-color molding method of an air-conditioning register according to the present invention, first, a part in which a thick part is divided in a thickness direction is molded with a first resin, and then the remaining part of the thick part is molded. Molded with the second resin. Therefore, a thick part is formed by integrally forming the molded bodies formed by the two moldings, and the thickness of the part and the remaining part of the divided body of the thick part formed by the respective molding steps are different from each other. It can be equivalent to the thickness of the general part. This prevents the molded product from being distorted at the time of molding shrinkage, so that a part and a remaining portion of the thick part divided in the thickness direction can be formed without causing defects such as sink marks and deformation, respectively. This prevents the occurrence of defects such as sink marks and deformation as a whole in the thick portion.

As the first resin and the second resin, the same kind of resin may be used, or different kinds of resins may be used.
Further, it is preferable that a part of the thick portion formed of the first resin divided in the thickness direction is cooled and solidified to form the remaining portion of the thick portion with the second resin. If the remaining portion is formed before solidification of a part of the thick portion, sink and deformation may occur in the thick portion due to distortion during cooling.

A part of the thick part formed by the first resin divided in the thickness direction and a remaining part of the thick part formed by the second resin are respectively provided in the thickness direction of the thick part by a predetermined amount. It is sufficient if it has a thickness, and the core portion and the skin portion of the thick portion may constitute a part and the remaining portion of the thick portion, respectively, or may be divided by a plane intersecting the thickness direction of the thick portion. Further, both sides may be part of the thick part and the remaining part, respectively. In addition, the thick portion may be used as a part of the product as it is, or in some cases, one of the thick portion and one of the remaining portion may be removed to obtain a product.

The thickness of each of the part and the remaining part of the thick part divided in the thickness direction is the total thickness of each part when the part and the remaining part of the thick part are formed alternately. Both have a thickness that does not cause defects such as sink marks and deformation. Specifically, it is desirable that the thickness of the thick part be set to be 1 ± 0.5 in a ratio of the thickness of the part divided in the thickness direction to the thickness of the remaining part. Thereby, it is possible to further prevent the occurrence of problems such as sink and deformation of the thick portion.

Although the present invention describes two-color molding,
Needless to say, the present invention can be applied to multi-color molding such as three-color molding or four-color molding.

[0014]

EXAMPLES Hereinafter, embodiments of the present invention will be specifically described with reference to examples. (Embodiment 1) In this embodiment, the present invention is applied to a method of manufacturing an air-conditioning register for an automobile.

FIGS. 1 to 3 show an air-conditioning register obtained by the two-color molding method of this embodiment. This air conditioning register has a frame portion 20 as a barrel forming a blowout opening,
A plurality of horizontal deflecting plates 21 suspended on the left and right walls of the frame portion 20 and parallel to each other, and are vertically rotatably supported by the frame portion 20 behind the horizontal deflecting plate 21 so as to extend in the vertical direction and be arranged in parallel with each other. A plurality of shaft portions 10, a plate-shaped rear vertical deflection plate 11 protruding from each shaft portion 10, and a front deflection plate 12 protruding from each shaft portion 10 to the opposite side to the rear deflection plate 11. ing.
Further, the frame portion 20 has a thick wall portion 3 whose bottom wall is thicker than the upper wall and the left and right walls. The thick portion 3 includes a core portion 14 and a skin portion 22, and the core portion 14 and the skin portion 22 are formed of different resins.

This air-conditioning register was manufactured as follows. First, a first molded body 1 shown in FIG. 4 was formed by injection molding from a first resin (ABS) having a relatively high melting point. The first molded body 1 includes a shaft 10, a rear vertical deflection plate 11 extending rearward from the shaft 10, and a rear vertical deflection plate 11 extending from the shaft 10.
A plurality of front vertical deflection plates 12 extending to the opposite side to 11 and arranged in parallel at equal intervals in the axial direction, and a support portion 13 extending rearward along the rear vertical deflection plate 11 from the lower end of the shaft portion 10, And a core unit 14. The core portion 14 extends in a rod shape continuously in the left-right direction (the direction perpendicular to the paper surface). A plurality of shaft portions 10 having a rear vertical deflection plate 11, a front vertical deflection plate 12, and a support portion 13 are formed, and the plurality of shaft portions 10 are arranged at equal intervals in the left-right direction (vertical direction of the paper). Has been established.

The plurality of support portions 13 of the first molded body 1 are provided with pivot holes 15 which are respectively opened at the lower end surfaces, and the core portion 14 is provided with a pair of locking holes 16 at both ends. Next, the other mold is replaced while the plurality of first molded bodies 1 are arranged in one mold, and the second resin (PP) having a melting point lower than that of the first resin and not welding to the first resin is used. The second molded body 2 was formed by injection molding.

The second molded body 2 includes a cylindrical frame portion 20 and a plurality of horizontal deflection plates 21 arranged in parallel at equal intervals in the frame portion 20.
A skin portion 22 that covers the core portion 14 of the first molded body 1; and a connecting rod that engages with each pivot hole 15 of the first molded body 1.
23. A plurality of shaft portions 10 of the first molded body 1
Are buried in the frame portion 20 of the second molded body 2 and the first resin and the second resin are not welded to each other, so that the shaft portion 10 is rotatable and the rear vertical deflection plate 11 and the front vertical deflection plate 12 It is swingable in the left and right directions. The connecting rod 23 connects the plurality of rear vertical deflection plates 11 and does not weld the first resin and the second resin. Therefore, the plurality of rear vertical deflection plates 11 and the front vertical deflection plates 12 swing in synchronization with each other. .

The skin portion 22 covers the core portion 14 and has a locking hole.
By engaging with 16, it is integrally connected with the core portion 14. The front vertical deflection plates 21 are arranged alternately with the horizontal deflection plates 21 in the vertical direction so as not to interfere with the horizontal deflection plates 21. In the air-conditioning register thus obtained, the thick portion 3 is formed by the core portion 14 and the skin portion 22, and the thick portion 3 is formed by being formed twice in the thickness direction. There is no defect that causes deformation or deformation. Then, a knob is held on one of the plurality of front vertical deflection plates 12, and by rotating the knob, the plurality of rear vertical deflection plates 11 and the front vertical deflection plates 12 simultaneously swing, so that the wind direction is changed in the left and right direction. Can be adjusted. If the frame 20 is pivotally supported on an instrument panel or the like so that it can swing up and down,
By swinging 20, the wind direction can be adjusted vertically.

(Embodiment 2) In this embodiment, an air-conditioning register similar to that of Embodiment 1 is manufactured except that the configuration of the thick portion 3 is different. That is, as shown in FIG.
Is composed of a lower member 30 formed of a first resin and an upper member 31 formed of a second resin. Since the thick portion 3 is formed by molding twice, the same as in the first embodiment. The occurrence of defects such as sink marks and deformation is prevented.

In the air-conditioning register obtained in this embodiment, it is possible to separate the lower member 30 from the upper member 31 and to increase the degree of freedom such that the lower member 30 can be applied to different types of vehicles. Effect is obtained.

[0022]

That is, according to the two-color molding method of the air-conditioning register of the present invention, a part obtained by dividing the thick part of the barrel in the thickness direction is formed of the first resin, and then the thick part is formed. Since the remaining part is molded with the second resin, the thickness of the part of the thick part divided body formed by each molding step and the thickness of the remaining part may be equal to the thickness of the other general parts, respectively. Thus, it is possible to reliably prevent problems such as sink marks and deformation from occurring in the thick portion.

[Brief description of the drawings]

FIG. 1 is a front view of an air-conditioning register manufactured according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a cross-sectional view of a first molded body molded from a first resin in one embodiment of the present invention.

5 is a cross-sectional view of the air conditioning register which is produced in the second embodiment of the present invention.

[Explanation of symbols]

1: First molded body 2: Second molded body
3: Thick part 14: Core part 20: Frame part 2
2: Skin part

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaki Otake 1 Ochiai Ogaai Nagahata, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture Inside Toyota Gosei Co., Ltd. (72) Inventor Takeaki Kato 1-Toyota-cho, Toyota-shi, Aichi Prefecture Toyota Motor Vehicle Inside (72) Inventor Koichi Suzuki 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (56) References JP-A-7-148778 (JP, A) JP-A-6-31771 (JP, A) JP-A-5-337983 (JP, A) JP-B Hei 1-367772 (JP, B2) JP-B Hei 6-26835 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29C 45/00-45/84 B29C 33/00-33/76 B60H 1/00-1/34 671

Claims (1)

(57) [Claims] 1. A plurality of air outlets formed parallel to each other.
A frame-shaped barrel having a horizontal deflection plate, and
A plurality of parallel to each other, which are swingably arranged in the barrel
Vertical deflection plate and resin air-conditioning register
A color molding method, wherein the barrel has a thick part at least in part, and the thick part is
The part divided in the thickness direction and the vertical deflection plate are used as the first resin.
Then, the remaining portion of the thick portion and the horizontal deflection plate are
A two-color molding method for an air-conditioning register, characterized by molding with a second resin having a melting point lower than that of one resin and not welding with the first resin .