JPH08183050A - Apparatus for molding cap member for helmet - Google Patents

Abstract

PURPOSE: To mold the cap member made of a synthetic resin of a helmet having an undercut part by using female and male molds. CONSTITUTION: A female mold 9 is constituted of a first female mold 10 and a pair of the second female molds 11 freely opening and closing left and right with respect to the first female mold 10 while a male mold 14 is constituted of a taper first male mold 15 and a pair of the second male molds 16 sliding along the taper surface of the first male mold 15 to freely open left and right. When the female mold 9 to which a synthetic resin sheet material S containing fibers is set is raised in such a state that the second male molds 16 are allowed to fall to be let approach mutually, the second male molds 16 are inserted in the female mold 9 as shown by a drawing (C). Continuously, when the female mold 9 and the second male molds 16 are integrally raised, the second male molds 16 are opened by the first male mold 15 and the female mold 9 and the male mold 14 are clamped as shown by a drawing (D). After the female mold 9 and the male mold 14 are heated to mold a cap member, both molds are opened by the reverse procedure and the second female molds 11 are opened left and right to take out the cap member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for molding a helmet cap with a synthetic resin.

[0002]

2. Description of the Related Art Conventionally, when molding a helmet cap body with a synthetic resin, a fiber preform and molten synthetic resin are placed on the molding surface of a female mold, and then an air bag is inflated inside the female mold. The preform and the molten synthetic resin were pressed against the molding surface of the female mold and solidified.

[0003]

However, in the above-mentioned conventional method, it is difficult to uniformly diffuse the molten synthetic resin on the molding surface of the female mold, and the thickness of the synthetic resin becomes uneven in each part of the cap body. There was an easy problem.

The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a molding device for a helmet cap body in which the thickness of the synthetic resin constituting the cap body can be arbitrarily set. To aim.

[0005]

In order to achieve the above object, the invention described in claim 1 is such that a lower half portion connected to a lower side of an upper half portion having a substantially hemispherical shape has an opening portion on a lower surface. A molding device for a helmet cap body, which has a cap body made of synthetic resin having an undercut portion that narrows toward the opening on both left and right sides and has a cavity defined between a female mold and a male mold. And the female mold is provided so as to be openable and closable in the left-right direction along the first female mold for molding the outer surface of the upper half part of the cap body, and the outer surface of the lower half part of the cap body. And a pair of second female molds for molding the male mold, the male mold having a tapered surface whose width in the left-right direction tapers toward the female mold, and The first male mold to be molded is slidably connected to the tapered surface of the first male mold to open and close in the left-right direction. , And the result and a second male pair for molding the inner surface of the right and left side portions of the cap body, the female,
It is characterized in that the first male mold and the second male mold are relatively movable in the vertical direction.

According to a second aspect of the invention, in addition to the structure of the first aspect, the first male die is fixed, and the second male die and the female die move relative to the first male die. It is characterized by being possible.

According to a third aspect of the invention, in addition to the structure of the first aspect, the female mold is fixed, and the first male mold and the second male mold are movable relative to the male mold. It is characterized by being.

According to a fourth aspect of the invention, in addition to the structure of the first aspect, a sheet material in which fibers and synthetic resin are integrated is set in a cavity defined between the female mold and the male mold. It is characterized in that the cap body is molded.

[0009]

According to the structure of claim 1, when the first male mold and the pair of second male molds are relatively moved in the vertical direction when the female mold and the male mold are clamped, the taper of the first male mold is obtained. As the second male die slides on the surface, the width of the second male die in the left-right direction is reduced. Therefore, by relatively moving the female mold and the male mold in the vertical direction, the second male mold can be inserted into the female mold through the opening of the second female mold corresponding to the undercut portion of the cap body. In this state, when the first male die is moved relative to the second male die, the pair of second male die expands in the left-right direction inside the female die due to the tapered surface of the first male die, and the female die And a cavity is defined between the male molds. After molding the synthetic resin cap body by the cavity, the female mold and the male mold can be opened by the procedure reverse to the above. To remove the cap body from the female mold, the pair of second female molds may be opened in the left-right direction.

According to the second aspect of the invention, the second male die and the female die move vertically with respect to the fixed first male die.
At that time, the size of the device in the vertical direction is reduced by sharing the movement space of the second male mold and the female mold.

According to the third aspect of the present invention, the first male die and the second male die move vertically relative to the fixed female die.
At that time, the size of the device in the vertical direction is reduced by sharing the movement space of the first male type and the second male type.

According to the structure of claim 4, the sheet material in which the fiber and the synthetic resin are integrated is set in the cavity and the cap body is molded, so that the fiber and the synthetic resin are set separately. Improves work efficiency.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 9 show an embodiment of the present invention. FIG. 1 is a front view of a helmet cap forming apparatus, and FIG.
1 is a sectional view taken along line 2-2 of FIG. 1, FIG. 3 is a sectional view taken along line 3-3 of FIG. 1, FIG. 4 is a view showing a mold clamping state of the mold, FIG. 5 is an enlarged view of a main part of FIG. 4, and FIG. Is an explanatory diagram of the action, FIG. 7 is an explanatory diagram of the action,
FIG. 8 is a development view of the resin sheet, and FIG. 9 is a perspective view of the helmet cap body.

Hereinafter, the front-rear direction, the left-right direction, and the up-down direction used in the specification are based on the cap body H shown in FIG. 9. The front-rear direction is the X direction, the left-right direction is the Y direction, and the up-down direction is Z. Corresponds to the direction. Also in other drawings, the hat body H is used as a reference in the front-rear direction, the left-right direction, and the up-down direction.

As shown in FIG. 9, the hat body H of the helmet molded by the present apparatus is of a so-called jet type, and the hat body H has a substantially hemispherical upper half portion and a lower portion integrally connected to the lower portion thereof. The lower half has openings H ₁ that open to the lower surface and the front surface, and undercuts H ₂ and H ₂ that are narrowed toward the openings H ₁ on the lower surface on both left and right sides. That is, a cross section S _{XZ obtained} by cutting the hat body H along the _XZ plane.
Does not include the undercut portions H ₂ and H ₂ , but the cross section S _YZ of the cap body H cut by the _YZ plane includes the undercut portions H ₂ and H ₂ . The undercut portion H ₂ ,
The presence of H ₂ makes it impossible to form the cap body H by simply dividing the female mold and the male mold into two parts, but the molding device of the present invention makes it possible. As shown in FIGS. 1 to 3, two guide rods 1, 1 located on the front side in the front-rear direction and two guide rods 2, 2 located on the other side in the front-rear direction.
Is fixed perpendicularly to the floor surface, and the fixed substrate 3 is fixed to the upper ends of these four guide rods 1, 1; 2, 2 and the first movable substrate 4 and the second movable substrate 5 are also fixed. Is supported so that it can slide up and down. The first movable substrate 4 is connected to an output rod 6 of a cylinder (not shown) and driven in the vertical direction, and the second movable substrate 5 is connected to the output rods 8 of the pair of cylinders 7 supported on the fixed substrate 3. And driven vertically.

The female die 9 provided on the first movable substrate 4 is fixed to the first movable substrate 4 to form the upper half of the cap body.
A female die 10 and a pair of second female dies 11, 1 which are provided on the first female die 10 so as to be openable and closable in the left-right direction to form the lower half of the cap body.
1 and 1. The second female dies 11 and 11 are driven to open and close between the solid line position and the chain line position in FIG. 1 by the cylinders 13 and 13 supported by the brackets 12 and 12 projecting from the left and right sides of the first female dies 10.

On the other hand, the male mold 14 is composed of a first male mold 15 located at the center in the left-right direction and a pair of second male molds 16, 16 located on the left and right sides thereof. The first male die 15 is fixed to the fixed substrate 3 via the first male die holder 17,
Therefore, the first male mold 15 cannot move. The pair of second male molds 16, 16 are supported on the second movable substrate 5 via the dovetail grooves 18, 18 so as to be openable and closable in the left-right direction. The left and right side surfaces of the first male die 15 are tapered toward the female die 9, and the left and right second male dies 16, 16 are formed on the tapered surfaces 15 ₁ , 15 ₁ via the dovetail grooves 19, 19. Engage slidably. Therefore, when the second male dies 16 and 16 move vertically with respect to the fixed first male dies 15, the second female dies 11 and 11 guided by the tapered surfaces 15 ₁ and 15 ₁ move to the dovetail groove 19, 1st through 19th
It slides with respect to the male mold 15 and slides with respect to the second movable substrate 5 via the dovetail grooves 18, 18 to open and close in the left-right direction.

As can be seen by referring to FIG. 4 together,
The stopper 2 is provided so as to surround the male mold 14 on the second movable substrate 5.
0 is fixed, and stopper surfaces 11 ₁ and 11 _{1 with} which the stopper 20 can abut are formed on the second female molds 11 and 11. When the female die 9 and the male die 14 are clamped, the stopper 20 abuts against the stopper surfaces 11 ₁ and 11 ₁ so that the distance between the female die 9 and the male die 14 is regulated to be constant. Thus, the cavity 21 is formed between the female die 9 and the male die 14.

Inside the female mold 9 and the male mold 14, a plurality of electric heaters 22 ... Are installed to heat them.

As is apparent from FIG. 5, when the female die 9 and the male die 14 are clamped, the tapered surface 15 ₁ of the first male die 15
The second male dies 16 and 16 pressed by the blades slightly expand in the left-right direction, and the stopper surfaces 16 ₁ and 1 of the second male dies 16 and 16 are opened.
6 ₁ comes into contact with the stopper surfaces 5 ₁ and 5 ₁ of the second movable substrate 5 and is positioned. As a result, at the upper end of the cavity 21 between the second male dies 16, 16 and the second female dies 11, 11, a minute gap 23 of, for example, about 0.2 mm and a space 24 continuous with the gap 23 are formed. .

FIG. 8 shows a sheet material S which is a material of the cap body H. The sheet material S is formed of a thermosetting synthetic resin mixed with reinforcing fibers such as glass and carbon into a flexible sheet shape. Then, it is cut according to the deployed state of the cap body H. With the sheet material S set in advance on the cavity surface of the female die 9, the female die 9 and the male die 14 are clamped to form the cap body H.

Next, the operation of the embodiment of the present invention having the above construction will be described.

First, the female die 9 and the male die 14 are opened, and the pair of second female dies 11, 11 of the female die 9 are opened at the open positions 11 (b), 11 shown by the chain line in FIG. 6 (A). Cylinder 1 in (b)
Open with 3, 13, first female mold 10 and second female mold 11, 11
After the sheet material S is set on the cavity surface of the pair, the pair of second female molds 11 and 11 are closed at the closed position 1 shown by the solid line in FIG.
Close to 1 (a) and 11 (a). At this time, the female mold 9 is positioned on the reference line P, and the male mold 14 is positioned on the reference line Q.

Subsequently, the cylinders 7 and 7 are extended and driven to drive the second movable substrate 5 so that the second male molds 16 and 16 are driven.
Is lowered from the reference line Q by a distance L ₁ and stopped at the position shown (see FIG. 6B). At this time, the second male mold 16,
Since 16 slides relatively to the fixed first male die 15, the left and right second male die 15 are guided by the tapered surfaces 15 ₁ and 15 _{1 of} the first male die 15 (see FIG. 5). Fifteen approach each other. As a result, the width of the second male molds 15, 15 in the left-right direction is slightly smaller than the width of the openings of the second female molds 11, 11 in the left-right direction.

Then, by driving the first movable substrate 4, the female die 9 is raised from the reference line P by a distance L ₂ .
The second male dies 15, 15 pass through the openings of the second female dies 11, 11 (see FIG. 7 (C)). By driving the first movable substrate 4 from this state, the female mold 9 is moved away from the reference line P by a distance L ₃
And the second movable substrate 5 is driven to retract the second male dies 16, 16 to the original position of the reference line Q (see FIG. 7D). As a result, the pair of second male dies 16, 16 expands in the left-right direction due to the relative movement with the first male dies 15, and the first female die 10, the second female dies 11, 11,
Cavity 2 between the first male mold 15 and the second male mold 16, 16.
1 is defined, and the sheet material S is sandwiched therebetween.

In this state, when the electric heaters 22 are energized to heat the female mold 9 and the male mold 14, the thermosetting resin of the sheet material S is cured and the fiber-reinforced resin cap body H is formed.

As is apparent from FIG. 5, the second female molds 16 and 16 are spread to the left and right by the wedge action of the tapered surfaces 15 ₁ and 15 ₁ of the first male mold 15 by mold clamping, and the second female mold 16 is expanded. , 1
The stopper surfaces 16 ₁ , 16 _{1 of} 6 contact the stopper surfaces 5 ₁ , 5 ₁ of the second movable substrate 5. Therefore, the second male type 16,
The edge portion of the cap body H can be sharply formed by regulating the gap between the second female mold 11 and the second female mold 11 to a predetermined size. At this time, the second male dies 16, 16 and the second female dies 1
Since the minute gap 23 is formed between 1 and 11, excess resin can escape from the gap 23 as burr S ₁ . The burr S ₁ is cut after the cap body H is taken out from the female mold 9.

When the resin of the cap body H is hardened, the female mold 9 and the male mold 14 are opened in the reverse order, that is, in the order of (D) → (C) → (B) → (A), Finally, in (A), the left and right second female dies 11, 11 are shown in solid line closed position 11
(A), 11 (a) to open position 11 shown by the chain line
The cap body H can be removed from the female mold 9 by opening the cylinders 13 and 13 in (b) and 11 (b).

As described above, since the outer surface and the inner surface of the cap body H are molded by the female mold 9 and the male mold 14, the problem that the thickness of the resin is uneven in each part of the cap body H is solved. Therefore, it is possible to obtain a high-quality cap body H having excellent strength. Moreover, the thickness of the resin of each portion of the cap body H is set to the female mold 9 and the male mold 1.
The design of 4 allows any adjustment.

Further, since the first male die 15 is fixed and the second male dies 16, 16 and the female die 9 are moved relative to the first male die 15, the vertical dimension of the apparatus is small. Can be converted. That is, the upper and lower reference lines P in FIG. 6 and FIG.
The space sandwiched by Q is raised by the female mold 9 and the second male mold 16,1.
It can be shared with the descent of 6.

If the second male molds 16 and 16 are fixed,
When the male mold 15 and the female mold 9 can be moved up and down, the first male mold 15 is arranged above the second male molds 16 and 16 so that they can be moved up and down, and the female mold is placed below the second male molds 16 and 16. Since it is necessary to dispose the 9 up and down freely, the up and down space of the first male die 15 and the up and down space of the female die 9 cannot be shared, and the device becomes large.

Even if the female mold 9 is fixed and the first male mold 15 and the second male molds 16, 16 are arranged to be movable up and down with respect to the female mold 9, the space for raising and lowering the first male mold 15 is also provided. And the second
Since the elevating space for the male molds 16 can be shared, the device can be downsized as in the embodiment.

In this case, in order to perform the mold clamping, first, only the second male dies 16, 16 are lowered with respect to the fixed female dies 9 to reduce the lateral width of the second male dies 16, 16. (Fig. 6
(See (A) and (B)). Up to this point, the operation is the same as in the first embodiment. Subsequently, the first male die 15 and the second male dies 16, 16 are both lowered to fit the second male dies 16, 16 into the female die 9 (see FIG. 10C), and finally the first male die The mold 15 is lowered to the same position as the second male molds 16 and 16 to move the second male molds 16 and 1.
6 may be expanded inside the female mold 9 (see FIG. 10D). Of course, the mold opening can be performed in the reverse order.

Although the embodiments of the present invention have been described in detail above, the present invention can be modified in various ways without departing from the scope of the invention.

For example, although the jet type helmet is illustrated in the embodiment, the present invention can be applied to a full face type helmet. In this case, the window portion is hollowed out after forming the cap body.

[0037]

As described above, according to the invention described in claim 1, since the cap body is molded by the cavity defined between the female mold and the male mold, the synthetic resin constituting each part of the cap body is formed. The thickness of the cap body can be set arbitrarily, which makes it possible to obtain a high-quality cap body having excellent strength. Also the first
By sliding the pair of second male molds with respect to the male mold,
The second male mold can be opened and closed to the left and right to be inserted into and taken out from the female mold, and the cap body can be removed from the female mold by opening and closing the pair of second female molds.

According to the invention described in claim 2,
By vertically moving the second male mold and the female mold relative to the fixed first male mold, it is possible to share the movement space of the second male mold and the female mold and reduce the vertical size of the device. it can.

According to the invention described in claim 3,
By vertically moving the first male mold and the second male mold relative to the fixed female mold, the moving space of the first male mold and the second male mold is shared and the vertical size of the device is reduced. be able to.

According to the invention described in claim 4,
By setting the sheet material in which the fibers and the synthetic resin are integrated in the cavity and molding the cap body, the work efficiency is improved as compared with the case where the fibers and the synthetic resin are separately set.

[Brief description of drawings]

FIG. 1 is a front view of a helmet cap forming apparatus.

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

FIG. 3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a view showing a mold clamping state of the mold.

5 is an enlarged view of a main part of FIG.

FIG. 6 is an explanatory diagram of the operation

FIG. 7 is an explanatory diagram of operation

FIG. 8 is a development view of a resin sheet

FIG. 9 is a perspective view of a helmet cap body.

FIG. 10 is a diagram corresponding to FIG. 7 according to the second embodiment of the present invention.

[Explanation of symbols]

H Hat body H ₁ Opening H ₂ Undercut S Sheet material 9 Female 10 First female 11 Second female 14 Male 15 First male 15 ₁ Tapered surface 16 Second male 21 Cavity

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Claims (4)

[Claims] 1. A lower half portion connected to a lower side of an upper half portion having a substantially hemispherical shape has an opening portion (H ₁ ) on a lower surface and is narrowed on both left and right sides toward the opening portion (H ₁ ). Molding device for helmet cap body for molding a synthetic resin cap body (H) having a cut portion (H ₂ ) by a cavity (21) defined between a female mold (9) and a male mold (14). The female mold (9) is a first female mold (10) for molding the outer surface of the upper half of the cap body (H), and is opened and closed in the left-right direction along the first female mold (10). A pair of second female molds (11) that are freely provided and mold the outer surface of the lower half of the hat body (H), and the male mold (14) has a lateral width in the female mold ( tapered surface tapered tapering towards 9) (15 ₁₎ has a cap body first male mold for molding the inner surface of the front and rear and top of the (H) (1 ) And is opened and closed to slidably connected to left and right direction with the tapered surface (15 ₁₎ of the first male mold (15), the cap body pair of shaping the inner surface of the right and left side portions of the (H) A second male mold (16), the female mold (9), the first male mold (15) and the second male mold (1).
A device for forming a helmet cap body, characterized in that 6) is relatively movable in the vertical direction. 2. The first male mold (15) is fixed, and the second male mold (16) and the female mold (9) are movable relative to the first male mold (15). The molding device for the helmet cap body according to claim 1. 3. The female die (8) is fixed, and the first male die (15) and the second male die (16) are movable relative to the male die (8). A device for forming a helmet cap body according to claim 1. 4. A cap body (H) in which a sheet material (S) in which fibers and synthetic resin are integrated is set in a cavity (21) defined between a female mold (9) and a male mold (14). The molding apparatus for a helmet cap body according to claim 1, wherein the molding apparatus is used for molding.