JP4647852B2 - Two-color synthetic resin molded product - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention embeds a first color synthetic resin molding portion having a plurality of mark display surfaces adjacent to each other with a gap between them, and embeds the mark display surface in a second color synthetic resin molding portion. The present invention relates to a two-color synthetic resin molded product that is exposed on the outer surface of a portion.
[0002]
[Prior art]
Such two-color synthetic resin molded products are already known as disclosed in, for example, registered utility model No. 2597196.
[0003]
By the way, in the two-color synthetic resin molded article described in the above publication, the first color synthetic resin molded portion has a plurality of raised portions having a plurality of mark display surfaces on one surface of the base plate embedded in the second color synthetic resin molded portion. In addition to forming, a through-hole opened between these raised portions is formed in the base plate so that when molding the second color synthetic resin molded portion, the material passes through the through-holes and fills between the plurality of raised portions. It has become.
[0004]
[Problems to be solved by the invention]
However, in the two-color synthetic resin molded article as described above, when the second synthetic resin molded portion is molded, the material does not flow smoothly between the plurality of raised portions due to the flow path resistance of the through hole. There is a possibility of causing a molding defect such that the plurality of mark display surfaces of the color synthetic resin molding portion are not clearly separated and displayed.
[0005]
The present invention has been made in view of such circumstances, and when molding the second color synthetic resin molded part, the plurality of mark display surfaces of the first color synthetic resin molded part can be clearly displayed separately. It is an object of the present invention to provide the two-color synthetic resin molded product.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a first color synthetic resin molded part having a plurality of mark display surfaces adjacent to each other with a gap is embedded in a second color synthetic resin molded part, and the mark display is performed. In a two-color synthetic resin molded product having a surface exposed to the outer surface of the second color synthetic resin molded portion, the first color synthetic resin molded portion includes a plurality of mark display surface forming portions each having the mark display surface; A rib for integrally connecting the mark display surface forming portions with each other at a portion retreated from the mark display surface, and a second color synthetic resin molded portion protruding from the back surface of the mark display surface of the mark display surface forming portion. A pin-shaped positioning projection that abuts against the wall surface of the molding die during molding and a radial projection from the outer periphery of the upper end of the positioning projection so that the mark display surface forming portions are integrated with each other on the back surface of the mark display surface. Linking That a cone-shaped part constructed integrally molded to the first, characterized in that to obscure to conceal the rib and umbrella-shaped portion in the second color synthetic resin molded portion.
[0007]
In addition to the first feature described above, the present invention has a second feature that the surface of the umbrella-like portion from which the positioning projection protrudes has an inverted mortar shape.
[0008]
The first color synthetic resin molding part and the second color synthetic resin molding part respectively correspond to a yellow caution mark plate and a black cap in the embodiments of the present invention described later.
[0009]
According to the first feature, when molding the second color synthetic resin molded portion, the material can be filled smoothly without interfering with the ribs , the umbrella-shaped portion and the positioning projection. Therefore, the second mark display surface is formed in a state where the plurality of mark display surfaces of the first color synthetic resin molded portion are clearly separated from each other by reliably hiding each rib and umbrella-shaped portion in the second color synthetic resin molded portion. It can be exposed to the outer surface of the part, and the display effect can be enhanced. Further, the umbrella-shaped portion formed on the outer periphery of the upper end of the positioning projection exhibits an anchor effect by being embedded in the second color synthetic resin molded portion, and the first color synthetic resin molded portion and the second color synthetic resin molded portion It contributes to strengthening the bond between.
[0010]
In addition to the first feature described above, the present invention has a second feature that the surface of the umbrella-like portion from which the positioning projection protrudes has an inverted mortar shape.
[0011]
According to the second feature, even if a water droplet penetrates to the outer periphery of the umbrella-shaped portion, the water droplet cannot go up the inverted mortar-shaped bottom surface, and therefore cannot pass around the positioning projection. , It is possible to prevent water droplets from entering the second color synthetic resin molded part back side.
[0012]
[Embodiment]
Embodiments of the present invention will be described based on one embodiment of the present invention shown in the accompanying drawings.
[0013]
FIG. 1 is a longitudinal sectional view (sectional view taken along line 1-1 of FIG. 2) of a main part of a brake reservoir for an automobile equipped with a cap with a caution mark plate according to the present invention, and FIG. 3 is an enlarged view of a main part of FIG. 1, FIG. 4 is a plan view of the caution mark plate, and FIG. 5 is a sectional view taken along line 5-5 of FIG.
[0014]
First, in FIGS. 1 to 3, a cap 1 is screwed into an oil filling port of a reservoir R that stores brake hydraulic oil of an automobile. A caution mark plate 2 is embedded in the upper wall of the cap 1 with a plurality of mark display surfaces 3a to 5a exposed. The caution mark plate 2 is made of yellow synthetic resin, and the cap 1 is made of black synthetic resin. The plurality of mark display surfaces 3a to 5a indicate that the reservoir R is used for braking, and alert the viewer not to inject anything other than brake operating oil.
[0015]
In particular, as shown in FIGS. 4 and 5, the caution mark plate 2 includes a circular first mark display surface forming portion 3 and surrounds the first mark display surface forming portion 3 with an annular gap 6. A polygonal second mark display surface forming unit 4, a third mark display surface forming unit 5 surrounding the second mark display surface forming unit 4 with a polygonal annular gap 7, and first and second A plurality (two in the illustrated example) of first ribs 8 and 8 arranged at equal intervals in the circumferential direction to connect the mark display surface forming portions 3 and 4, and the second and third mark display surface forming portions 4 and 4. The plurality of (eight in the illustrated example) second ribs 9, 9... Arranged at equal intervals in the circumferential direction so as to connect the five are integrally formed with a yellow synthetic resin. At this time, the upper surfaces of the first to third mark display surface forming portions 3 to 5 are formed as the first to third mark display surfaces 3a to 5a. The second and third mark display surfaces 4a and 5a which are flush with each other are formed so as to protrude one step higher. Further, the first ribs 8, 8 and the second ribs 9, 9,... Are disposed at sites that are retracted from the first to third mark display surfaces 3a to 5a.
[0016]
The second mark display surface forming portion 4 is formed with a pair of arc-shaped slits 12, 12 that are opposed to each other with an annular gap 6 interposed therebetween, and between the slits 12, 12 and the annular gap 6 , The pin-like positioning projections 10 and 10 projecting downward from the back surface of the mark display surface 4a of the second mark display surface forming portion 4 and the slits 12 and 12 projecting radially from the outer periphery of the upper end of each positioning projection 10 and 10 in the radial direction. In addition, umbrella-shaped portions 11, 11 connecting the first and second mark display surface forming portions 3, 4 so as to cross the annular gap 6 are integrally formed on the lower surface of the caution mark plate 2. And the lower surface 11a of each umbrella-shaped part 11 and 11 is formed in a reverse mortar shape.
[0017]
In embedding the caution mark plate 2 in the upper wall of the cap 1, as shown in FIG. 5 (when forming, the figure is upside down), the first mark is first placed in the positioning recess 15 a of the lower mold 15. By fitting the protruding first mark display surface 3a side of the display surface forming portion 3 and setting the caution mark plate 2, the upper mold 16 is closed and the positioning protrusions 10 and 10 are pressed down, thereby the caution mark plate 2 Hold. Therefore, the cap 1 is molded by injecting plasticized black synthetic resin into a cap molding cavity 17 defined between the lower mold 15 and the upper mold 16.
[0018]
At the time of molding, the material of the cap 1 and the black synthetic resin are almost obstructed by the first and second ribs 8 and 9, the umbrella-shaped portions 11 and 11 and the positioning projections 10 and 10 while surrounding the caution mark plate 2. Therefore, the annular gap 6, the polygonal gap 7 and the slits 12 and 12 can be filled smoothly. As a result, the first and second ribs 8 and 9 and the umbrella-like portions 11 and 11 are securely buried and concealed in the cap 1, and the first to first portions that are in close contact with the lower mold 15 are located on the upper surface side of the cap 1. The 3-mark display surfaces 3a to 5a are exposed in a state of being clearly separated from each other, and the display effect can be enhanced.
[0019]
Further, the umbrella-shaped portions 11, 11 formed on the outer periphery of the upper end portions of the positioning projections 10, 10 exhibit an anchor effect by being buried in the cap 1, and contribute to strengthening the coupling between the caution mark plate 2 and the cap 1. To do.
[0020]
By the way, when the cap 1 is molded, the lower surfaces of the positioning projections 10 and 10 that are in contact with the upper mold 16 are exposed to the lower surface of the cap 1. When peeling occurs at the joint portion, there is a risk that water droplets such as rainwater entering the peeling portion may enter the cap 1 through the periphery of the positioning projections 10, 10. In this embodiment, however, the positioning projection 10 Since the lower surface 11a of the umbrella-shaped part 11 formed integrally with the outer periphery of the upper end part of 10 has a reverse mortar shape, even if the water droplets penetrate into the outer periphery of the umbrella-shaped part 11, 11, by any chance. The water droplets cannot go up the inverted mortar-shaped lower surface 11a, and therefore cannot pass around the positioning protrusions 10 and 10, so that the water droplets can be prevented from entering the back side of the cap 1.
[0021]
In FIGS. 1 and 2 again, a recess 20 a formed in the middle of the breather passage 20 in the cap 1 is disposed immediately below the exposed lower end surface of the positioning protrusions 10, 10. In this case, even if the water droplets have passed around the umbrella-shaped portions 11 and 11 and the positioning projections 10 and 10, the water droplets are received by the recesses 20a and 20a (one of them is shown in the figure). Intrusion into the reservoir R can be prevented.
[0022]
The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention.
[0023]
【The invention's effect】
As described above, according to the first feature of the present invention , the first color synthetic resin molded portion having a plurality of mark display surfaces adjacent to each other with a gap therebetween is embedded in the second color synthetic resin molded portion, In a two-color synthetic resin molded product in which the mark display surface is exposed on the outer surface of the second color synthetic resin molded portion, the first color synthetic resin molded portion is formed with a plurality of mark display surfaces each having the mark display surface. And a rib that integrally connects the mark display surface forming portions with each other at a portion retreated from the mark display surface, and protrudes from the back surface of the mark display surface of the mark display surface forming portion, and the second color composition A pin-shaped positioning projection that abuts against the wall surface of the molding die during molding of the resin molding portion, and a back surface of the mark display surface between the mark display surface forming portions projecting radially from the outer periphery of the upper end portion of the positioning projection In one Constituted by integrally molding a cone-shaped part which forms an, since the rib was embedded so as to conceal the second color synthetic resin molded part, during molding of the second color synthetic resin molded part, is the material the Each gap can be filled smoothly without being obstructed by the ribs. Therefore, the ribs are surely concealed in the second color synthetic resin molded portion, and a plurality of marks are displayed on the first color synthetic resin molded portion. The surfaces can be exposed to the outer surface of the second mark display surface forming portion in a state of being clearly separated from each other, and the display effect can be enhanced. Further, the umbrella-shaped portion formed on the outer periphery of the upper end of the positioning projection exhibits an anchor effect by being embedded in the second color synthetic resin molded portion, and the first color synthetic resin molded portion and the second color synthetic resin molded portion It contributes to strengthening the bond between.
[0024]
According to the second feature of the present invention, in addition to the first feature, the surface of the umbrella-shaped portion from which the positioning projection protrudes has an inverted mortar shape. Even if it penetrates to the outer periphery of the shaped part, the water droplets cannot go up the bottom of the inverted mortar and therefore cannot pass around the positioning protrusions. Can be prevented.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a main part of a brake reservoir for an automobile equipped with a cap with a caution mark plate according to the present invention (a sectional view taken along line 1-1 in FIG. 2).
FIG. 2 is a view taken in the direction of arrow 2 in FIG.
FIG. 3 is an enlarged view of a main part of FIG.
FIG. 4 is a plan view of the caution mark plate.
5 is a cross-sectional view taken along line 5-5 in FIG.
[Explanation of symbols]
1 ... Second color synthetic resin molding part (cap)
2 .... 1st color synthetic resin molding part (caution mark plate)
3... Mark display surface forming part (first mark display surface forming part)
3a: Mark display surface (first mark display surface)
4. Mark display surface forming part (second mark display surface forming part)
4a: Mark display surface (second mark display surface)
5... Mark display surface forming part (third mark display surface forming part)
5a: Mark display surface (third mark display surface)
6,7 ... Gap 8,9 ... Ribs
10 ... Pin-shaped positioning protrusion
11 ... Umbrella-shaped part
11a .. The lower surface of the umbrella-shaped part

Claims (2)

A first color synthetic resin molding part (2) having a plurality of adjacent mark display surfaces (3a to 5a) with a gap (6, 7) therebetween is embedded in the second color synthetic resin molding part (1). In the two-color synthetic resin molded product formed by exposing the mark display surfaces (3a to 5a) to the outer surface of the second color synthetic resin molded portion (1),
The first color synthetic resin molding portion (2), the mark display surface forming portions (3-5) each having the mark display surfaces (3a-5a), and these mark display surface forming portions (3-5) The ribs (8, 9) that are integrally connected to each other at a portion retreated from the mark display surfaces (3a to 5a), and the mark display surfaces (3a to 5a) of the mark display surface forming portions (3 to 5) And a pin-shaped positioning projection (10) that abuts against the wall surface of the molding die during molding of the second color synthetic resin molding portion (1), and an outer periphery of the upper end portion of the positioning projection (10). An umbrella-shaped portion (11) that projects in the radial direction and integrally connects the mark display surface forming portions (3-5) is integrally formed, and the ribs (8, 9) and the umbrella-shaped portion ( 11) is buried so as to conceal the second color synthetic resin molded portion (1) Features that, two-color synthetic resin molded article. 2. The two-color synthetic resin molded product according to claim 1, wherein a surface (11 a) of the umbrella-shaped portion (11) from which the positioning protrusion (10) projects has an inverted mortar shape.

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