JP2020104419A - Molding apparatus and molding method of long fiber reinforced thermoplastic resin product - Google Patents

Abstract

To mold a long fiber reinforced thermoplastic resin product that has the basic shape of having the same cross section at any part in the length direction and extending in one direction, and has an additional shape in part of the length direction.SOLUTION: A pultrusion molding apparatus 10 has: a cavity 35 having a predetermined cross section and extending in one direction; and a pulling device 50 for pulling the material W1 downstream of the pultrusion molding apparatus 10 so that the material W1 passes through the cavity 35, and molds an intermediate molded article W2 having a basic shape. An injection molding apparatus 70 injection-molds the intermediate molded article W2 to provide an additional shape and molds a final molded article W3. The pultrusion molding apparatus 10 and the injection molding apparatus 70 are relatively displaceable between an approached state in which they are close to each other and a separated state in which they are separated from each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to an apparatus and method for forming long fiber reinforced thermoplastic products.

A molded product made of a fiber-reinforced thermoplastic resin (a material having a thermoplastic resin and fibers) may be molded by, for example, press molding. Injection molding may be added to press molding.

By the way, it is required that even a long product extending in one direction be molded with a fiber-reinforced thermoplastic resin.
However, the above-mentioned technique (first conventional technique) requires a molding device having a length corresponding to the length of a long object, which increases cost and requires a large space.

On the other hand, a long product made of a fiber reinforced thermoplastic resin may be molded as follows (second prior art).
The molding apparatus has a cavity having a predetermined cross section. Then, the thermoplastic resin (material) containing fibers is pulled out so as to pass through the cavity while being heated.
Thus, a long product having the same cross section and extending long at any part in the longitudinal direction is formed of the fiber-reinforced thermoplastic resin.

By the way, basically, there is a demand for a long product having the same cross section (having a basic shape) in any part and further having an additional shape in a part of the length direction. This is because the strength is reinforced by having the additional shape.
However, it is impossible to mold such a molded article by the above-mentioned technique (second conventional technique).

In addition, as a patent document showing a conventional technique, there is one described below.

JP, 2012-136653, A JP, 2014-148124, A

INDUSTRIAL APPLICABILITY The present invention has a long fiber-reinforced thermoplastic having a basic shape having the same cross section at any part in the length direction and extending in one direction, and having an additional shape in a part of the length direction. It is an object to provide a technique for molding a resin product.

In order to solve the above problems, a first aspect of the present invention is a molding apparatus for manufacturing a final molded product by using a material having a thermoplastic resin and fibers, which comprises a pultrusion molding apparatus and an injection molding apparatus. The pultrusion apparatus has a cavity that has a predetermined cross section and extends in one direction, and a pultrusion mechanism that pulls the material downstream of the pultrusion apparatus so that the material can pass through the cavity. , An intermediate molded product having a basic shape extending in one direction having the same cross section in any part of the length direction, and the injection molding device is provided on the downstream side of the pultrusion molding device. And an additional shape is imparted to the intermediate molded product by injection molding.

With the molding apparatus of this aspect, the following operational effects are obtained.
In the pultrusion molding apparatus, the material is drawn by the drawing mechanism, so that the material passes through a cavity having a predetermined cross section and extending in one direction. In this way, an intermediate molded product having the same cross section and a basic shape extending in one direction is molded at any part in the longitudinal direction.
Then, in the injection molding device provided on the downstream side of the pultrusion molding device, the intermediate molded product is injection-molded to give an additional shape. Thus, the final molded product is molded.
In this way, a long fiber-reinforced heat having a basic shape that has the same cross section in any part of the length direction and extends in one direction, and has an additional shape in a part of the length direction. A plastic resin product is molded.

A second aspect of the present invention is the molding apparatus according to the first aspect, wherein the pultrusion molding apparatus and the injection molding apparatus relatively move between a close state in which they are close to each other and a separated state in which they are separated from each other. It is a molding device that can be displaced.

In the molding apparatus of this aspect, the following effects can be obtained in addition to the effects of the molding apparatus of the first aspect by being used as follows.
An intermediate molded product is molded from the material by the pultrusion molding device.
At the same time, while the material is moved to the downstream side relative to the pultrusion molding device by the pultrusion mechanism, the molding device is displaced from the approaching state to the distant state, so that the intermediate molded product is removed from the injection molding device. It is in a state where it does not move relatively. Then, the intermediate molded product is injection-molded by an injection molding device to give an additional shape. Thus, the final molded product is molded.
By being used in this way, in this molding apparatus, the intermediate molding is continuously molded from the material by the pultrusion molding apparatus, and the additional molding is intermittently imparted by the injection molding apparatus, so that the final molding is obtained. Molded.

A third aspect of the present invention is the molding apparatus according to the first aspect, wherein the pultrusion molding apparatus is provided between an approach position closer to the injection molding apparatus and a separation position spaced from the injection molding apparatus. While the pultrusion molding device is moving from the separated position to the approaching position, the pultrusion molding device molds the intermediate molded product, and the intermediate molded product is downstream from the injection molding device. Side to side relative movement and the injection molding device moves from the approach position to the separated position while molding the intermediate molded product by the pultrusion molding device and the intermediate molded product is injected into the injection molding device. The phase is changed between a separated drawing state that does not move relative to the molding apparatus, and is controlled by the injection molding apparatus in the separated drawing state to impart the additional shape to the intermediate molded product, It is a molding device.

With the molding apparatus of this aspect, the final molded product is molded in the same manner as the molding apparatus of the second aspect.
That is, in the approach drawing state, while the pultrusion molding device moves from the separated position to the approach position, the pultrusion molding device molds the intermediate molded product, and the intermediate molded product is relatively positioned downstream of the injection molding device. Move.
In the separated drawing state, while the injection molding device moves from the approach position to the separated position, the intermediate molding product is molded by the pultrusion molding device and the intermediate molding product does not move relative to the injection molding device.
Then, in the separated and pulled out state, an additional shape is imparted to the intermediate molded product by the injection molding device, and the final molded product is molded.

A fourth aspect of the present invention is the molding apparatus according to any one of the first to third aspects, wherein the injection molding apparatus has a first mold and a second mold, and the first mold is the first mold. The first mold is movable between a first mold standby position and a first mold clamping position, and the second mold is movable between a second mold standby position and a second mold clamping position. Injection-molding an intermediate molded product with the first mold located at the mold clamping position and the second mold located at the second mold clamping position sandwiching the intermediate molded product. Is a molding device.

In the molding apparatus of this aspect, the following operational effects are obtained in addition to the operational effects of the molding apparatus of any one of the first to third aspects.
In a state where injection molding is not performed on the intermediate molded product that flows into the injection molding device from the pultrusion molding device, the intermediate molded product/final molded product includes the first mold located at the first mold standby position and the second mold. It is possible to smoothly move the injection molding device between the second mold located at the mold standby position.
On the other hand, in a state where the intermediate molding product flowing from the pultrusion molding apparatus to the injection molding apparatus is to be injection-molded, the first mold located at the first mold clamping position and the second mold clamping position. By sandwiching the intermediate molded product with the second mold located at, the injection molding is appropriately performed on the intermediate molded product at a predetermined height position.

A fifth aspect of the present invention is a molding method for producing a final molded product by using a material having a thermoplastic resin and fibers, wherein the material is to pass through a cavity having a predetermined cross section and extending in one direction. A pultrusion process for drawing the material to form an intermediate molded product having a basic shape that has the same cross section at any part in the longitudinal direction and extends in one direction; and injection molding for the intermediate molded product. And an injection molding step of imparting an additional shape to the molding method.

With the molding method of this aspect, the following operational effects are obtained.
In the pultrusion process, the material is pulled out so that the material passes through a cavity having a predetermined cross section and extending in one direction. In this way, an intermediate molded product having the same cross section and a basic shape extending in one direction is molded at any part in the longitudinal direction.
At the same time, in the injection molding process, the intermediate molded product is injection-molded to give an additional shape. Thus, the final molded product is molded.
In this way, a long fiber-reinforced heat having a basic shape that has the same cross section in any part of the length direction and extends in one direction, and has an additional shape in a part of the length direction. A plastic resin product is molded.

A sixth aspect of the present invention is the molding method according to the fifth aspect, wherein in the pultrusion molding step, an intermediate molded article is continuously molded from the material, and in the injection molding step, the intermediate molding is performed intermittently. It is a molding method for molding a final molded product from a product.

With the molding method of this aspect, the following operational effects are obtained in addition to the operational effects of the molding method of the fifth aspect.
In this molding method, since the intermediate molded product is continuously molded and the final molded product is molded intermittently, the final molded product is efficiently molded. That is, even in the step of molding the final molded product from the intermediate molded product, the intermediate molded product is molded from the material simultaneously and in parallel.
Therefore, the intermediate molded product is molded from the material in the pultrusion molding process, and in a state where the molding work is stopped, compared with the case where the final molded product is molded from the intermediate molded product in the injection molding process, it is more efficient. The final molded product is molded.

It is a side view which shows the shaping|molding apparatus of one Example of this invention. It is a front view which shows the pultrusion molding apparatus of the molding apparatuses of one Example of this invention. It is a figure which takes out and shows the type|mold of the pultrusion molding apparatus of the molding apparatuses of one Example of this invention. (A) is a side sectional view, (b) is a front view (view seen from the upstream side), and (c) is a rear view (view seen from the downstream side). FIG. 3 is an exploded perspective view showing a mold of the pultrusion molding apparatus of the molding apparatus according to the embodiment of the present invention, which is taken out and shown. (A) is a figure which shows an upper mold (view seen from diagonally downward), and (b) is a view which shows a lower die (view seen from diagonally upper). A side view showing an upper mold and a lower mold of an injection molding device of a molding device of one embodiment of the present invention (the upper mold is located at a lower mold upper position and the lower mold is located at a lower mold raised position) Figure). It is an exploded perspective view showing an upper mold and a lower mold of an injection molding device of a molding device of one example of the present invention. (A) is a figure which shows an upper mold (view seen from diagonally downward), and (b) is a view which shows a lower die (view seen from diagonally upper). It is a block diagram which shows the control apparatus of the shaping|molding apparatus of one Example of this invention, and its connection state. It is a figure which shows the effect|action in the shaping|molding apparatus of one Example of this invention. It is a figure which shows the initial stage. It is a figure which shows the effect|action in the shaping|molding apparatus of one Example of this invention. It is a figure which shows the next step of FIG. 8A. It is a figure which shows the effect|action in the shaping|molding apparatus of one Example of this invention. It is a figure which shows the next step of FIG. 8B. It is a figure which shows the effect|action in the shaping|molding apparatus of one Example of this invention. It is a figure which shows the next step of FIG. 8C. It is a figure which shows the effect|action in the shaping|molding apparatus of one Example of this invention. It is a figure which shows the next step of FIG. 8D. It is a perspective view which shows the target object (work) shape|molded by the shaping|molding apparatus of one Example of this invention. (A) shows a material, (b) shows an intermediate molded product, (c) shows a final molded product. In (b) and (c), the intermediate molding/final molding is shown upside down.

Next, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, this molding apparatus has a pultrusion molding apparatus 10 and an injection molding apparatus 70, and also has a control device 90 (FIG. 7).
This molding apparatus uses a material (molded object) W1 (FIG. 9(a)) made of a thermoplastic resin and fibers to form an intermediate molded product W2 (FIG. 9(b)), and then a molded product. (Final molded product) W3 (FIG. 9C) is molded (manufactured).
The material W1, the intermediate molded product W2, the final molded product W3, and those in a state between them are collectively referred to as a work W.

As shown in FIG. 9A, the material W1 is a strip-shaped long member having flexibility. That is, the material W1 has the same width in the length direction and extends in one direction.
As shown in FIG. 9B, the intermediate molded product W2 has a vertically inverted angular U-shaped (square U-shaped) cross section, and has a basic shape that extends in one direction (length direction). It is a long product. That is, the intermediate molded product W2 has a pair of vertical wall portions V and an upper plate portion U connecting the upper end portions of the two vertical wall portions V.
As shown in FIG. 9(c), the final molded product W3 has the basic shape described above, and a part having a rib R (additional shape) spaced apart at a predetermined interval in the lengthwise direction thereof. It is a scale. The rib R has a plate shape and connects the upper plate portion U and the pair of vertical wall portions V.

As described above with reference to FIGS. 1 and 7, the molding apparatus has the pultrusion molding apparatus 10 and the injection molding apparatus 70, and also has the control device 90. The control device 90 controls the operations of the pultrusion molding device 10 and the injection molding device 70.
The pultrusion molding apparatus 10 and the injection molding apparatus 70 are arranged in series, and the injection molding apparatus 70 is located on the downstream side of the pultrusion molding apparatus 10.
Then, the elongated material W1 (FIG. 9A) is molded into an intermediate molded product W2 (FIG. 9B) by the pultrusion molding apparatus 10. Then, the intermediate molded product W2 is molded into the final molded product W3 (FIG. 9C) by the injection molding device 70.
That is, as shown in FIGS. 8A to 8E, in the operating state of this molding apparatus, the material W1, the intermediate molded product W2, and the final molded product W3 are integrated in the longitudinal direction from the upstream side to the downstream side (upper and lower). Inverted) will exist.

As shown in FIG. 1, the injection molding device 70 is fixedly installed.
On the other hand, the pultrusion molding apparatus 10 is provided so as to be movable (displaceable) between an approach position (approach state) (shown by a solid line in FIG. 1) and a separation position (separation state) (shown by a two-dot chain line in FIG. 1). Has been.
The approaching position (approaching state) is a position (state) approaching the injection molding device 70, and the separating position (separating state) is a position (state) separated from the injection molding device 70.

The pultrusion molding device 10 has a preliminary heating device 20, a mold 30 (lower mold 30A and upper mold 30B), a cooling device 40, and a drawing device 50 (pulling mechanism) from the upstream side to the downstream side.
The pultrusion molding device 10 has a frame 11, and the preliminary heating device 20, the mold 30 (lower mold 30A and upper mold 30B), the cooling device 40, and the pultrusion device 50 are provided for the frame 11.

As shown in FIGS. 1 and 2, the pultrusion molding apparatus 10 is accompanied by a base 60. The base 60 is fixedly installed.
The base 60 extends in the length direction (moving direction) of the material W1 (workpiece W). The base 60 is provided with a pair of rails 62. Corresponding to each rail 62, the frame 11 is provided with a plurality of pairs of straddle portions 12 along the moving direction thereof.

The pultrusion molding apparatus 10 (frame 11) is movable by the moving motor 14 along the pair of rails 62 in the straddle portion 12 between the approaching position and the separating position.
That is, the moving motor 14 is fixed to the frame 11, and the pinion 15 is fixed to the rotating shaft of the moving motor 14. On the other hand, the base 60 is provided with a rack 65, and the pinion 15 is engaged with the rack 65.
Then, the rotation of the pinion 15 (rotation in the forward direction/reverse direction) accompanying the rotation of the moving motor 14 causes the rack 65 to move relative to the pinion 15 along the length direction of the pinion 15, resulting in The pultrusion molding apparatus 10 (frame 11) reciprocates along the length direction (movement direction) of the work W.

The moving motor 14 is connected to the control device 90 (FIG. 7). The degree of rotation of the rotation shaft of the moving motor 14 is recognized by the control device 90, and the position and moving speed of the pultrusion molding device 10 are recognized. At the same time, the degree of rotation of the rotary shaft of the moving motor 14 is controlled by the control device 90, and the position and moving speed of the pultrusion molding device 10 are controlled.

As shown in FIG. 1, the preliminary heating device 20 heats the material W1 (workpiece W) immediately before flowing into the mold 30 (lower mold 30A and upper mold 30B). That is, as shown in FIG. 2, the preliminary heating device 20 is located on the left and right sides of the material W1 and heats the material W1.

As shown in FIG. 1, the pultrusion molding apparatus 10 has a mold 30. The mold 30 is formed by combining the lower mold 30A and the upper mold 30B.
The mold 30 (the lower mold 30A and the upper mold 30B) extends long along one direction (the length direction (moving direction) of the material W1 (workpiece W)) and is fixedly provided to the frame 11. .. The lower die 30A and the upper die 30B are provided with a heating mechanism (not shown) by a heating wire.

As shown in FIG. 3, a cavity 35 is provided between the lower mold 30A and the upper mold 30B. The cavity 35 extends long along the length direction of the mold 30.
As shown in FIG. 4, the lower die 30A is provided with a concave portion 35A, and correspondingly, the upper die 30B is provided with a convex portion 35B. The concave portion 35A and the convex portion 35B are along the length direction of the mold 30 (the lower mold 30A and the upper mold 30B). The portion between the concave portion 35A and the convex portion 35B is the cavity 35 (FIG. 3).

As shown in FIG. 3, in the cavity 35, the upstream portion and the midstream portion are gradually narrow cross-section portions 31, and the downstream portion is the same cross-section portion 32.
The recess 35A of the lower die 30A has the same size and shape at any part in the length direction.
The convex portion 35B of the upper die 30B has the same size and shape in any portion in the length direction in the same cross-section portion 32, and in the gradually narrowing cross-section portion 31, from the downstream side to the upstream side. It is gradually smaller toward the side while maintaining a similar shape.

The cross section of the cavity 35 in the same cross section 32 uniformly corresponds to the cross section of the intermediate molded product W2. That is, in the same cross-section portion 32, any portion in the length direction thereof has a square U-shape corresponding to the cross section of the intermediate molded product W2, and its width corresponds to the wall thickness of the intermediate molded product W2. doing.

In the gradually narrow cross section 31, the width of the cross section of the cavity 35 gradually increases from the downstream side toward the upstream side. That is, the cross section of the gradually narrowing cross section 31 also has a square U shape, but at the upstream end of the mold 30 (the gradually narrowing cross section 31), the width is considerably wider than the thickness of the intermediate molded product W2. The width gradually decreases from the upstream side to the downstream side, and reaches the same cross section 32.

As shown in FIG. 1, the cooling device 40 is provided on the downstream side of the mold 30 (the lower mold 30A and the upper mold 30B). The cooling device 40 cools the work W by ejecting air from the left and right sides of the work W immediately after flowing out from the mold 30 (the upper mold 30B and the lower mold 30A).

As shown in FIG. 1, the drawing device 50 has two pairs of rollers 52A and 52B at the top and bottom. Each of the rollers 52A and 52B is rotated by the pulling drive motor 54, and the pulling device 50 (rollers 52A and 52B) moves the intermediate molded product W2 (workpiece W) relatively downstream in the downstream side of the cooling device 40. Let
In this way, the drawing device 50 draws the material W1 (workpiece W) into the mold 30 through the upstream end (opening) of the mold 30 (cavity 35) (flows into the mold 30) to move the inside of the mold 30 (cavity 35). It is moved from the upstream end to the downstream end, and is pulled out of the mold 30 (flowed out of the mold 30) through the downstream end (opening) of the mold 30 (cavity 35).
Furthermore, the drawing device 50 also contributes to introducing the intermediate molded product W2 (workpiece W) into the injection molding device 70 and causing the final molded product W3 to flow out from the injection molding device 70.

The pull-out drive motor 54 is connected to the control device 90 (FIG. 7). The degree of rotation of the rotary shaft of the pull-out drive motor 54 is recognized by the control device 90, and the position and moving speed of the work W are recognized. At the same time, the degree of rotation of the rotary shaft of the pulling drive motor 54 is controlled by the controller 90, and the position and movement speed of the work W are controlled.

Then, as shown in FIG. 1, in the pultrusion molding apparatus 10, the material W1 (FIG. 9(a)) is moved to the downstream side by the operation of the pultrusion apparatus 50 and is preliminarily heated by the preliminary heating apparatus 20. It is slightly softened, and the slightly softened material W1 (workpiece W) flows into the cavity 35 (FIG. 3) of the mold 30.

Then, the workpiece W moves in the cavity 35 while being further heated and softened in the cavity 35. At that time, the tapered cross-section 31 gradually approaches the predetermined shape (the shape of the intermediate molded product W2), and the same cross-section 32 fits into the predetermined shape (the shape of the intermediate molded product W2).

After that, after the work W flows out from the mold 30, it is cooled by the cooling device 40 (FIG. 1) and maintained in a predetermined shape, and the intermediate molded product W2 (upside down state) (FIG. 9B). Will be completed.

As shown in FIG. 1, the injection molding apparatus 70 has a lower mold 80A (first mold) and an upper mold 80B (second mold). Both the lower mold 80A and the upper mold 80B are movable.
The lower die 80A can be moved up and down between a lowered position (shown by a solid line) and an elevated position (shown by a chain double-dashed line) by operating the lower die cylinder 72A. The lowered position (lower mold lowering position) is the standby position (first mold standby position), and the raised position (lower mold raised position) is the mold clamping position (first mold clamping position).
Similarly, the upper mold 80B can be moved up and down between a raised position (shown by a solid line) and a lowered position (shown by a chain double-dashed line) by the operation of the upper mold cylinder 72B. The ascending position (upper mold raising position) is the standby position (second mold waiting position), and the descending position (upper mold lowering position) is the mold clamping position (second mold clamping position).

As shown in FIG. 6, a groove 85A is formed on the upper surface of the lower mold 80A. The groove 85A extends along the moving direction of the work W (intermediate molded product W2/final molded product W3), and extends from the upstream end to the downstream end of the upper surface of the lower mold 80A.
The width and depth of the groove 85A correspond to the width and height of the intermediate molded product W2/final molded product W3. To be precise, the width (distance between the outer surfaces of both vertical wall portions V) and height (the upper surface of the upper plate portion U and the upper end portions of both vertical wall portions V) on the outside of each of the intermediate molded product W2/the final molded product W3. It corresponds to the distance between).

A fitting protrusion 85B is provided on the lower surface of the upper mold 80B. The fitting protrusion 85B has an elongated rectangular parallelepiped shape corresponding to part (center and vicinity) of the groove 85A of the lower mold 80A.
The width and depth of the fitting protrusion 85B correspond to the width and height of the intermediate molded product W2/final molded product W3. To be precise, the inner width (distance between the inner surfaces of both vertical wall portions V) and height (the lower surface of the upper plate portion U and the upper end portions of both vertical wall portions V) of both of the intermediate molded product W2/the final molded product W3. It corresponds to the distance between).

As shown in FIG. 5, a molten resin inflow portion 81 is formed on the upper portion of the upper mold 80B. The injection device 75 (FIG. 1) is connected to the molten resin inflow portion 81. The injection device 75 is connected to the control device 90 (FIG. 7).
As shown in FIG. 5, a molten resin flow path 82 is formed in the upper mold 80B. The molten resin flow passage 82 is connected to the molten resin inflow portion 81 at its upper end portion. The molten resin flow path 82 extends downward in the upper mold 80B, branches into three in the middle, and reaches the fitting protrusion 85B.
As shown in FIGS. 5 and 6, in the fitting protrusion 85B, three rib forming groove portions 86 are formed corresponding to the three ribs R of the final molded product W3 (FIG. 9C). ..

In the injection molding apparatus 70 (FIG. 1), the lower mold 80A is located at the lower mold lowering position and the upper mold 80B is located at the upper mold raising position (both are shown by solid lines in FIG. 1). W (intermediate molded product W2/final molded product W3) (upside down state) is movable.

On the other hand, when the work W (intermediate molded product W2) (upside down state) does not move, the upper die 80B is located at the upper die lowering position (shown by a chain double-dashed line in FIG. 1), so that the fitting protrusion 85B is formed. (FIG. 6A) fits inside the work W (intermediate molded product W2) (between the pair of vertical plate portions V (FIG. 9B)). Further, the work W (intermediate molded product W2) is fitted into the groove 85A of the lower mold 80A when the lower mold 80A is located at the lower mold raising position (shown by the chain double-dashed line in FIG. 1).
In this way, the groove 85A of the lower mold 80A and the fitting protrusion 85B of the upper mold 80B sandwich the intermediate molded product W2 (inverted state).

In that state, the molten resin flowing through the molten resin inflow portion 81 (FIG. 5) based on the operation of the injection device 75 (FIG. 1) flows through the molten resin flow path 82, and the three rib forming groove portions of the fitting protrusion 85B. The intermediate molded product W2 (inverted state) (FIG. 9(b)) was filled with 86 and contacted with the inner surfaces of both vertical wall portions V and the lower surface of the upper plate portion U, and then filled in the rib forming groove portion 86. The molten resin solidifies. At the same time, the lower mold 80A descends and the upper mold 80B rises, whereby three ribs R are formed on the intermediate molded product W2, and the final molded product W3 (FIG. 9C) is molded.

The lower mold cylinder 72A, the upper mold cylinder 72B (FIG. 1), and the injection device 75 (FIG. 1) are connected to the control device 90 (FIG. 7). The operations of the lower mold cylinder 72A, the upper mold cylinder 72B, and the injection device 75 are controlled in association with the position of the pultrusion molding device 10 and the condition (moving/stopping condition) of the work W.

Next, the control contents and the effects of this molding apparatus will be described.
The pull-out drive motor 54 (FIG. 1) is basically always rotated at the same speed in the same direction.
As a result, the work W (material W1/intermediate molded product W2) moves to the downstream side at basically the same speed with respect to the pultrusion molding device 10. That is, the material W1 (FIG. 9(a)) moves to the downstream side of the mold 80 (cavity 35) basically at the same speed by the drawing device 50 (rollers 52A, 52B), and the intermediate molded product W2 (FIG. 9( b)) is molded. This process is the "pultrusion process".

On the other hand, the moving motor 14 (FIG. 1) can be appropriately switched between rotation in the forward direction and rotation in the reverse direction.
As a result, the pultrusion molding device 10 moves from the separated position to the approach position or moves from the approach position to the separated position.
The moving speed from the separated position to the approaching position is basically the same as the moving speed of the work W (material W1/intermediate molded product W2) by the drawing device 50, and the moving speed from the approaching position to the separated position is the drawing device. It is basically the same as the moving speed of the work W (material W1/intermediate molded product W2) by 50 in the opposite direction.

As shown in FIGS. 8A to 8B, in the injection molding apparatus 70, the lower mold 80A is located at the lower mold lowering position and the upper mold 80B is located at the upper mold raising position, and the pultrusion molding device 10 is located at the approaching position from the separated position. The intermediate molded product W2 moves to the downstream side of the injection molding device 70 by moving toward the. That is, the space between the lower mold 80A (lower mold lower position) and the upper mold 80B (upper mold raised position) is smoothly moved. This state is the “approaching pulling state”. The moving speed thereof is basically twice the moving speed of the drawing device 50.

After the pultrusion molding apparatus 10 is located at the approaching position as shown in FIG. 8B, the plucking device 50 is moved from the approaching position to the distant position as shown in FIGS. 8B→8C→8D→8E→FIG. 8A. To move. At that time, the intermediate molded product W2 is basically stopped with respect to the injection molding device 70. This state is the "separation withdrawal state".
In that state, injection molding is performed in the injection molding device 70 to mold the final molded product W3. This process is the "injection molding process".

That is, as shown in FIGS. 8B to 8C, the upper mold 80B moves (lowers) from the upper mold rising position to the upper mold lowering position. Immediately after the upper die 80B reaches the upper die lowering position, the lower die 80A moves (raises) from the lower die lowering position to the lower die raising position as shown in FIGS. 8C to 8D.
Immediately after the lower mold 80A reaches the lower mold rising position and the groove 85A of the lower mold 80A and the fitting protrusion 85B of the upper mold 80B sandwich the intermediate molded product W2 (upside down state). The injection device 75 is activated and the molten resin is supplied to the intermediate molded product W2.

Immediately after that, as shown in FIG. 8D→FIG. 8E, the lower mold 80A moves (lowers) from the lower mold raising position to the lower mold lowering position, and the upper mold 80B moves from the upper mold lowering position to the upper mold raising position. Move (rise) toward you. At the same time, the pultrusion molding apparatus 10 further moves toward the separated position and returns to the state of FIG. 8A.

By repeating the above, the intermediate molded product W2 is continuously molded from the material W1, and the final molded product W3 is intermittently molded from the intermediate molded product W2.

It should be noted that the above is merely one embodiment of the present invention, and it is needless to say that the present invention can be carried out in a mode in which various modifications are made based on the knowledge of those skilled in the art.

For example, in the above-described embodiment, the injection molding device 70 does not move, and the pultrusion molding device 10 moves between the approach position and the separation position with respect to the injection molding device 70, but conversely, the pultrusion molding device 70. Alternatively, the injection molding device 70 may move between the approach position and the separation position with respect to the pultrusion molding device 10 without moving the device 10.
Further, both the pultrusion molding device 10 and the injection molding device 70 may be moved between an approach position and a separated position with respect to each other.
On the other hand, neither the pultrusion molding apparatus 10 nor the injection molding apparatus 70 move, and the pultrusion molding apparatus 10 intermittently molds the intermediate molded product W2, and then the injection molding device 70 completes molding of the final molded product W3. May be.

Further, the shapes of the intermediate molded product (W2) and the final molded product (W3) are not limited to those described based on FIGS. 9B and 9C, and various shapes can be applied.
For example, the "basic shape" may have a V-shaped cross section or a trapezoidal cross section and extend in one direction. Further, the “additional shape” may have various shapes corresponding to the basic shape.
Further, the above embodiment may be turned upside down or rotated 90 degrees.

Further, in the injection molding apparatus 70, the lower mold 80A and the upper mold 80B are provided as the first mold and the second mold in the above embodiment, but a left mold and a right mold may be provided.

10 Pultrusion molding device 14 Moving motor 35 Cavity 50 Pulverizing device (pulling mechanism)
70 injection molding device 80A lower mold (first mold)
80B Upper mold (second mold)
W Work W1 Material W2 Intermediate molded product W3 Final molded product

Claims (6)

A molding apparatus for manufacturing a final molded article using a material having a thermoplastic resin and fibers,
It has a pultrusion molding device and an injection molding device,
The pultrusion molding apparatus has a cavity having a predetermined cross section and extending in one direction, and a drawing mechanism for drawing the material downstream of the pultrusion molding apparatus so that the material can pass through the cavity. To form an intermediate molded product having a basic shape having the same cross-section at any of the parts and extending in one direction,
The injection molding device is provided on the downstream side of the pultrusion molding device and imparts an additional shape to the intermediate molded product by injection molding.
Molding equipment. The molding apparatus according to claim 1, wherein
The pultrusion molding apparatus and the injection molding apparatus are relatively displaceable between an approaching state in which they are close to each other and a separated state in which they are separated from each other,
Molding equipment. The molding apparatus according to claim 1, wherein
The pultrusion molding device is movable between an approach position close to the injection molding device and a separation position separated from the injection molding device,
While the pultrusion molding device moves from the separated position to the approaching position, the pultrusion molding device molds the intermediate molded product, and the intermediate molded product moves relatively to the downstream side with respect to the injection molding device. The approaching and withdrawing state,
While the injection molding device is moving from the approach position to the separation position, the pultrusion molding device molds the intermediate molding product, and the separation drawing device does not move the intermediate molding product relative to the injection molding device. Change phase with state,
Controlled to impart the additional shape to the intermediate molded product by the injection molding device in the separated pull-out state,
Molding equipment. The molding apparatus according to any one of claims 1 to 3,
The injection molding apparatus has a first mold and a second mold,
The first mold is movable between a first mold standby position and a first mold clamping position,
The second mold is movable between a second mold standby position and a second mold clamping position,
The first mold located at the first mold clamping position and the second mold located at the second mold clamping position inject the intermediate molded product into the intermediate molded product while injecting the intermediate molded product. To be molded,
Molding equipment. A molding method for producing a final molded article using a material having a thermoplastic resin and fibers,
Intermediate molding having a basic shape that has the same cross section and extends in one direction at any part in the longitudinal direction by pulling out the material so that the material passes through a cavity that has a predetermined cross section and extends in one direction A pultrusion molding process for molding a product,
An injection molding step of imparting an additional shape to the intermediate molded product by injection molding.
Molding method. The molding method according to claim 5, wherein
In the pultrusion molding step, while continuously molding the intermediate molded product from the material,
In the injection molding step, the final molded product is intermittently molded from the intermediate molded product,
Molding method.

Images