JP2001341170A - Mold for molding resin substrate with sealed part and molding method for the substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold for molding a resin substrate with a sealed part which can be attached without the help of another person and is prevented from substaining the loosening, disconnection and falling-off of a sealing member, in the resin substrate with the sealed part as well as a molding method for the substrate. SOLUTION: The mold 20 for molding the resin substrate 1a with the sealed part is operated in such a manner that a fixed part 21 and a movable part 22 arranged opposite to the fixed part 21 form a first cavity and a second cavity K2 and the first cavity which enables the resin substrate 1a to be molded when the fixed part 21 and the movable part 22 are closed is formed and the second cavity K2 for molding the sealed part is formed by the formed resin substrate 1a and the movable part 22 surrounding the second cavity K2 when the part 22 is moved back by a specified distance as a 'core back' action.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die and a molding method for a resin base provided with a seal part, and more particularly to a seal part capable of integrally forming a seal part on a resin base. The present invention relates to a molding die and a molding method for a resin substrate provided.

[0002]

2. Description of the Related Art When a lid is provided in a storage section, a sealing material is sometimes attached to the lid in order to prevent water or dust from entering the storage section. In particular, when a storage portion for storing a helmet or the like is formed below a vehicle seat of a motorcycle, a scooter, or the like, rainwater, dust, sand, and the like are likely to enter because the storage portion is outdoors.

[0003] For this reason, as shown in FIG.
4, a hole 82 is formed in the outer periphery of the
A technique is known in which the seal member 83 is fitted and attached, or the seal member 83 is directly bonded to the outer periphery on the vehicle body side using an adhesive.

Alternatively, as shown in FIG. 15, a hole 102 is formed in the outer periphery of a bottom plate 101 which is in contact with the vehicle body side, and a seal member 120 is fitted into the hole 102, or the seal member 120 is joined with an adhesive. For example, the contact portion between the vehicle seat and the storage section is waterproofed.

[0005]

In the above-mentioned prior art, the work of fitting the seal members 83 and 120 or the work of joining with an adhesive are performed manually.
There was a problem in the mounting workability. Also, the sealing member 8
In order to fit 3,120 with fitting or adhesive,
There is a problem that the sealing effect is lost due to the floating, detachment, falling off, etc. of the sealing members 83, 120.

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to mount a seal portion on a resin base having a seal portion without manual operation, and to prevent the seal member from floating, coming off, or falling off. It is another object of the present invention to provide a molding die and a molding method for a resin substrate having a seal portion.

[0007]

SUMMARY OF THE INVENTION According to a first aspect of the present invention, there is provided a molding die for molding a resin substrate having a seal portion. In a molding die, a first cavity and a second cavity are formed by a fixed die and a movable die disposed opposite to the fixed die.
Is formed, a first cavity capable of molding the resin base is formed when the fixed mold and the movable mold are closed, and the first cavity is formed when the movable mold is core-backed by a predetermined distance. This problem is solved by forming a second cavity for molding the seal portion, surrounded by the resin base and the movable mold.

As described above, the mold for molding a resin substrate of the present invention is obtained by molding the resin substrate with the fixed mold and the movable mold first cavity, and then moving the movable mold. A second cavity is formed surrounded by the distal end of the seal mounting portion and the movable mold, and the second cavity is filled with a rubber-based resin as a material of the seal portion to form the seal portion. With such a configuration, it is possible to perform both the molding of the resin base and the molding of the seal portion in one mold, reducing the mold and man-hours, improving the production efficiency and reducing the cost. It is possible to realize the reduction.

Further, since the resin base and the sealing portion are integrally formed, it is possible to prevent the sealing member from floating, coming off, falling off, and the like. Furthermore, the molding of the resin base and the molding of the seal portion are performed in the same mold,
Since there is no need to transfer the resin base to the mold for forming the seal portion as in the conventional case, there is no resin leakage due to the dimensional mismatch between the resin base and the mold as in the conventional case, and the occurrence of defective products is reduced. This can be prevented.

If the movable mold at the position where the second cavity is formed is formed with a projection whose tip is directed toward the fixed mold, a concave portion is provided in a part of the resin base 1 to form the mold. You.

As described above, since the concave portion is provided in a part of the resin base 1 and molded, the movable cavity is backed by a predetermined distance to form a seal portion in the second cavity formed. When the rubber-based resin is injected, both sides of the cutout of the resin base are pushed outward by the injection pressure of the material, so that there is no gap between the resin base and the movable mold. In this way, it is possible to prevent material leakage from the seal portion.

According to a third aspect of the present invention, in the method for molding a resin base having a seal portion, the fixed die and the movable die are clamped. Forming a resin base by filling the first cavity formed with the resin with the resin base; and allowing the movable mold to core-back a predetermined distance to form the resin base and the resin base. A core back step of forming a second cavity surrounded by a movable mold, and a seal molding step of filling the second cavity with a rubber-based resin and integrally molding the seal portion with the resin base. It is characterized by comprising.

A bottom plate of a vehicle seat of a motorcycle, for example, is formed as a resin base having the seal portion. When a bottom plate is formed, the seal portion is provided at a peripheral edge of the bottom plate. The bottom plate provided with the seal portion is used for a vehicle seat provided as a lid above a vehicle body storage portion of a motorcycle.

As described above, when a bottom plate of a vehicle seat provided as a lid above a body storage portion of a motorcycle is formed as a resin base having a seal portion, the bottom plate is generally used. If the helmet holder is formed by forming a hole in the center and filling this hole with rubber-based resin, the helmet stored in the vehicle body storage part will be damaged, It is suitable because it can prevent backlash.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a molding die 20 for molding a resin base 1a having a seal portion 6, and a method of manufacturing the same. The molding die 20 is composed of a fixed die 21 and a movable die 22 arranged opposite to the fixed die 21. The fixed die 21 and the movable die 22 include a _first cavity K ₁ and a second cavity K _1. It is configured to K ₂ and is formed.

The first cavity _{K 1} is formed when the fixed mold 21 and movable mold 22 are closed. The first cavity K ₁ in the resin substrate 1a is molded. Also, the second
Cavity K ₂ of, when the movable mold 22 by a predetermined distance core back, which is formed surrounded by the first resin substrate 1a and the movable mold 22 which is formed in the cavity K _1, the second
In the cavity K ₂ seal portion 6 is molded. In the die 20 of the present embodiment, the second cavity K ₂ is a resin substrate 1
a formed at both ends.

[0016] Incidentally, the movable die 22 located at a position to form a second cavity K _2, projections 22a are provided toward the distal end to the fixed mold 21 side. Thus, the protrusion 2
By providing 2a, concave portion 4a is provided in part 4 of resin base 1a formed in contact with protrusion 22a.

As described above, a portion 4 of the resin base 1a
The by recess 4a is formed is provided, the second cavity K ₂ formed by the movable mold 22 by a predetermined distance core back, when injecting a rubber-based resin for forming the seal portion 6, Resin base 1a by injection pressure of rubber-based resin
Since both side portions 4b of the concave portion 4a are pushed outward,
The movable mold 22 is in close contact with both sides 4b of the concave portion 4a of the resin base 1a, and the gap between the resin base 1a and the movable mold 22 is eliminated. In this way, it is possible to prevent material leakage when the seal portion 6 is formed.

The resin base 1a having the seal portion 6 of the present embodiment.
Is formed by the following steps. That is, the fixed mold 21
A resin base molding step S1 of molding a resin base 1a by filling a resin into a _first cavity K1 formed by clamping the mold and the movable mold 22, and core-moving the movable mold 22 by a predetermined distance. sealing Te, a core back process S2 of forming a second cavity K ₂ surrounded by at least a resin substrate 1a and the movable mold 22, is filled with a rubber-based resin to the second cavity K ₂ in the resin substrate 1a And a seal forming step S3 for forming the part 6 integrally.

The resin base 1a having the sealing portion 6
Is, for example, a bottom plate 1 of a vehicle seat S used as a lid of a body-side storage portion of a motorcycle. At this time, a seal portion 6 is provided at a peripheral edge of the bottom plate 1.

As described above, when forming the bottom plate 1 of the vehicle seat S disposed as a lid above the vehicle body storage portion as the resin base 1a having the seal portion 6, the bottom plate 1 When the helmet holder 7 is formed by filling a rubber-based resin into the hole 1b so as to form a hole 1b at a substantially central portion of the helmet, the helmet stored in the vehicle body storage portion is damaged, This is preferable because the backlash can be prevented.

[0021]

An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention, and can be variously modified within the scope of the present invention.

1 to 11 show an embodiment of the present invention. FIG. 1 is a perspective view showing a vehicle seat and a storage section of a motorcycle, and FIG. 2 is a rear view of the vehicle seat of FIG. FIGS. 3 to 5 are explanatory diagrams showing a molding die and a molding step of a bottom plate as a resin base, and FIGS. 6 to 10 are enlarged views of a main part showing a molding step of a seal portion.
1 is an enlarged view of a main part of FIG. The members, arrangements, and the like described below do not limit the present invention, and can be variously modified within the scope of the present invention.

In this embodiment, a description will be given based on an example in which the resin base provided with a seal portion is applied to the bottom plate 1 of a vehicle seat S for a motorcycle or the like. The resin base provided with the seal portion is not limited to the bottom plate 1 shown in the present embodiment, but may be a lid for a trunk placed on a rear carrier,
Covers that have a structure that belongs to the category of so-called lids, such as side-back covers, timing-belt covers, speaker lids that fit inside car doors, and storage shelves that open and close, are also included.

As shown in FIG. 1, a storage portion 12 for storing a storage item such as a helmet is formed in a body cover 11 of the motorcycle 10. A vehicle seat S is provided above the storage section 12.

A hinge portion (not shown) is provided on the back surface of the front side (left side in FIG. 1) of the vehicle seat S, and the hinge portion is engaged with the vehicle body, so that the vehicle seat S is formed. It is provided so as to be openable and closable at the upper part of the storage part, and is configured to serve as a lid of the storage part.

Also, at the end opposite to the hinge,
A seat lock 5 is arranged, and is configured to fasten the vehicle seat S and the vehicle body side by a seat catch (not shown) provided on the vehicle body side.

As shown in FIG. 3, the vehicle seat S of this embodiment has a cushioning material 2 made of urethane foam or the like placed on a bottom plate 1 made of polypropylene (PP) or the like. (PVC) It is covered with a skin material 3 made of leather or the like.

On the surface of the bottom plate 1 on the vehicle body side,
When the vehicle seat S is mounted on the vehicle body, a seal mounting portion 4 is formed at a position where it comes into contact with a projecting portion formed on the upper surface of the wall of the storage portion.
The thermoplastic elastomer is provided around the seal mounting portion 4 so as to rise from the seal mounting portion 4, and the seal portion 6 is formed.

A concave portion 4a is formed in the seal mounting portion 4,
The seal portion 6 is provided so as to bite into the concave portion 4a. Similarly to the seal mounting part 4,
A recess 6a is provided.

Next, a method of manufacturing the bottom plate 1 as a resin base having a seal portion will be described. The bottom plate 1 is formed by a molding die 20.

First, the molding die 20 of this embodiment will be described.
I do. The molding die 20 is, as shown in FIG.
1 and a movable mold 22 arranged opposite to the fixed mold 21
The fixed cavity 21 and the movable mold 22 form a first cavity.
K₁And the second cavity K ₂Are formed so that
Has been established.

The first cavity _{K 1} is formed when the fixed mold 21 and movable mold 22 are closed. The second cavity K _2, when the movable mold 22 by a predetermined distance core back, formed by being surrounded by the first resin substrate 1 molded in the cavity K ₁ and the movable mold 22. In the die 20 of the present embodiment, the second cavity K ₂ is formed on the peripheral edge side of the resin substrate 1.

[0033] Note that the movable mold 22 located at a position to form a second cavity K _2, projections 22a are provided toward the distal end to the fixed mold 21 side. In this example, a projection 22a having a substantially triangular cross section is provided. in this way,
Since the projection 22a is provided, a recess having substantially the same shape as the projection 22a is provided in the molded body formed in contact with the projection 22a.

Using the molding die 20, the sealing portion 6
Of the bottom plate 1 provided with The manufacturing process of the bottom plate 1 includes a resin base forming process S1, a core backing process S2, and a seal forming process S3.

In the resin substrate forming step S1, the bottom plate main body 1a of the bottom plate 1 is formed as a resin substrate. In the resin substrate molding step S1, the molding die 20 is in a state where the fixed die 21 and the movable die 22 are closed as shown in FIG.

[0036] At this time, the first cavity K ₁ formed between the fixed mold 21 and movable mold 22, a polypropylene resin which is the material of the bottom plate main body 1a is filled from the injection molding machine. Thus, the main body 1a of the bottom plate 1 is formed.

[0037] In the molding die 20 of the present embodiment, as described in the next step, the second cavity K ₂ is formed when the movable mold 22 by a predetermined distance core back, the second cavity in locations where K ₂ is formed, the projections 22a are provided toward the distal end to the fixed mold 21 side.

[0038] Thus, the peripheral portion of the first bottom plate body 1a which is molded in the cavity K ₁ in the resin substrate molding step S1 is concave 4a is formed in a shape provided by the projection 22a. That is, the concave portion 4a is formed in the seal mounting portion 4 protruding from the peripheral portion of the bottom plate main body 1a.

Next, the process proceeds to the core back step S2.
In the core back step S2, as shown in FIG.
2 is core-backed by a predetermined distance. By moving the movable mold 22 back by a predetermined distance, the bottom plate main body 1a formed in the bottom plate forming step S1 and the movable mold 22
Between the second cavity K ₂ is formed.

The second cavity _{K 2} is formed on the peripheral edge side of the bottom plate main body 1a. Second cavity K
When ₂ is formed, the process proceeds to the seal forming step 50, as shown in FIG. 6, the second to the cavity K _2, filling the elastomer system resin which is the material of the seal portion 6 by an injection molding machine.

As described above, the recesses 4a are formed in the seal mounting portion 4 of the bottom plate main body 1a by the projections 22a provided on the movable mold 22, so that the second
When filled with elastomeric resin into the cavity K _2, an injection pressure of elastomeric resin, both side portions 4b of the recesses 4a, 4b is pushed in the direction of the arrow shown in FIG. 11.

As described above, both sides 4b, 4 of the concave portion 4a provided in the seal mounting portion 4 of the bottom plate main body 1a.
Since b is pushed outward, both sides 4b, 4b and movable mold 22 are in close contact with each other, and a gap between bottom plate main body 1a and movable mold 22 is eliminated.

Thus, the bottom plate body 1a and the
Since there is no gap between the moving mold 22 and the second cavity,
IK₂Airtightness is maintained, and the second cavity
IK ₂Material leaks when filling with elastomeric resin
Can be prevented from occurring.

In this embodiment, since the bottom plate 1 of the vehicle seat S disposed above the vehicle body storage section is formed as a resin base having a seal section, the seal section 6 is formed. In addition, it is more preferable that the helmet retainer 7 is also formed.

When forming the helmet retainer 7,
When the bottom plate main body 1a is formed, the bottom plate main body 1a is formed such that the hole 1b is provided at a substantially central portion of the bottom plate main body 1a. By hole 1b is provided, when the movable mold 22 by a predetermined distance core back core back process S2, a third cavity K ₃ is formed.

[0046] In the seal forming step S3, when filling the elastomeric resin into the second cavity K _2, at the same time, also to fill the elastomeric resin to the third cavity K _3. Thus, the helmet retainer 7 is formed substantially at the center of the bottom plate main body 1a.

By forming the helmet retainer 7 as described above, for example, when the helmet is stored in the storage portion, the helmet is damaged even if the top of the helmet may contact the bottom plate 1. Can be prevented.

Since the helmet is fixed by the helmet retainer 7, it is possible to prevent the helmet from rattling in the storage section. In addition to the helmet holder, a configuration may be adopted in which a vibration-proof rubber is attached to a predetermined position of the bottom plate main body 1a.

[0049] In the above embodiment, the portion where the second cavity K ₂ of the movable mold 22 is formed, like triangular sectional projection 2
Although the configuration in which 2a is provided is shown, the shape of the protrusion is not limited to this, and may be, for example, a substantially circular cross section shown in FIG.

Next, the bottom plate 1 and the cushion material 2
An assembling step 60 of assembling the surface material 3 with the skin material 3 is performed. The assembling step may be performed by a conventionally known method. The cushion material 2 is placed on the bottom plate 1 and covered with the skin material 3, and the terminal portion of the skin material is driven into the back surface of the bottom plate 1 by stapling or the like. .

[0051]

As described above, according to the present invention, the resin base and the sealing portion can be formed in one mold without moving the resin base during the manufacturing process. Therefore, the number of dies and man-hours are reduced, and it is possible to realize an improvement in production efficiency and a reduction in cost.

Further, when forming the seal portion, it is not necessary to transfer the resin base to the mold for forming the seal portion during the manufacturing process as in the prior art. Leakage and the like are eliminated, and the occurrence of defective products can be prevented.

In the present invention, the seal portion is formed by the second cavity formed when the movable die is core-backed by a predetermined distance, but the movable die at the position where the second cavity is formed is formed. Is formed with a projection formed at the mounting position of the sealing portion of the resin base, since the projection has a tip directed toward the fixed mold.

When a material for forming the seal portion is injected into the second cavity by forming the concave portion at the mounting position of the seal portion of the resin base,
Since both sides of the concave portion are pushed outward by the injection pressure of the material, the concave portion and the movable die are in close contact with each other, and the gap between the resin base and the movable die is eliminated. In this way, the airtightness of the second cavity is maintained, and it is possible to prevent material leakage from the seal portion.

By forming a bottom plate of a vehicle seat provided as a lid above the body storage portion of the motorcycle as a resin base having a seal portion, the seal member is prevented from floating, coming off and falling off. In addition to this, it is possible to reliably prevent water, dust and the like from entering.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a vehicle seat and a storage section of a motorcycle.

FIG. 2 is an explanatory diagram showing a back surface of the vehicle seat of FIG. 1;

FIG. 3 is an explanatory view showing a mold for molding a bottom plate as a resin base having a seal portion and a molding step.

FIG. 4 is an explanatory view showing a molding die for a bottom plate as a resin base having a seal portion and a molding step.

FIG. 5 is an explanatory diagram showing a molding die for a bottom plate as a resin base having a seal portion and a molding step.

FIG. 6 is an enlarged view of a main part showing a molding step of a seal part.

FIG. 7 is an enlarged view of a main part showing a molding step of a seal part.

FIG. 8 is an enlarged view of a main part showing a molding step of a seal part.

FIG. 9 is an enlarged view of a main part showing a molding step of a seal part.

FIG. 10 is an enlarged view of a main part showing a molding step of a seal portion.

FIG. 11 is an enlarged view of a main part of FIG. 9;

FIG. 12 is an explanatory view showing another shape of the seal mounting portion and the seal portion.

FIG. 13 is an explanatory view showing another shape of the seal mounting portion and the seal portion.

FIG. 14 is an explanatory view showing a conventional example.

FIG. 15 is an explanatory diagram showing a conventional example.

DESCRIPTION OF SYMBOLS 1 Bottom plate 1a Bottom plate main body 2 Cushion material 3 Skin material 4 Seal mounting part 4a Depression 4b Both sides of depression 5 Seat lock 6 Seal part 6a Depression 7 Helmet press 10 Motorcycle 11 Body cover 12 Storage part 20 Molding Mold 21 Fixed mold 22 Movable mold K ₁ First cavity K ₂ Second cavity K ₃ Third cavity S Vehicle seat

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29L 31:58 B29L 31:58

Claims (6)

[Claims] 1. A molding die for molding a resin base having a seal portion, comprising: a fixed die; and a movable die disposed to face the fixed die.
Forming a first cavity and a second cavity, forming a first cavity capable of molding the resin base when the fixed mold and the movable mold are closed, and causing the movable mold to core-back a predetermined distance; A second cavity for molding the seal portion, which is surrounded by the formed resin base and the movable mold, when the resin base is provided with a seal portion. Mold for molding. 2. The resin-made resin provided with a seal portion according to claim 1, wherein the movable mold at the position where the second cavity is formed has a projection whose tip is directed toward the fixed mold. Mold for molding the substrate. 3. A method of molding a resin substrate having a seal portion, wherein a resin is filled into a first cavity formed by clamping a fixed die and a movable die, thereby forming the resin substrate. A base-forming step of forming a base; a core-back step of causing the movable mold to core-back a predetermined distance to form a second cavity surrounded by the formed resin-made base and the movable mold; And a seal molding step of integrally molding the seal portion with the resin substrate by filling a rubber-based resin into the resin substrate. 4. The mold according to claim 1, wherein the resin base provided with the seal portion is a bottom plate of a vehicle seat. 5. The mold for molding a resinous base having a seal portion according to claim 4, wherein the seal portion is provided at a peripheral edge portion of the bottom plate. 6. The helmet holder according to claim 4, wherein the bottom plate is formed so that a hole is provided at a substantially central portion thereof, and the hole is filled with a rubber-based resin to form a helmet retainer. A mold for molding a resin substrate provided with a seal portion.