JPS63162220A - Manufacture of laminate object - Google Patents

Abstract

PURPOSE:To produce effectively a part whose skin is laminated to the end portion by a method in which at the molding of resin material, while holding a winding form at molding position, a soft sheet is molded and cured in the state where said sheet has been wound in, and then the winding form is moved to a retracted position, when the molded object is taken out. CONSTITUTION:The ramp surface of a movable mold 16 is engaged with the outer surface 26 of a winding form 14 the soft sheet 30 intervening therebetween. The winding form 14 is moved inside from a retracted position with the approaching of the movable mold 16. The movable mold 16 is perfectly lapped on a stationary mold 10, and the mold clamping is achieved, whereby the winding form 14 is kept at molding position. The soft sheet 30 is caused to adhere to the first molding surface 12 and a winding and molding surface 20, and is molded into the shape corresponding to the surface and end portion of a laminate object to be produced. On the other hand, molten resin material 34 is injection molded into between the soft sheet 30 and the second molding surface 18. After the resin material 34 has been cured, the movable mold 16 is moved in the direction separating it from the stationary mold 10.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method for manufacturing bonded parts, and in particular to the production of parts in which a relatively soft skin is bonded to the surface of a resin base material by wrapping around the edges of said base material. It is about the method.

BACKGROUND OF THE INVENTION Products in which a relatively soft skin is bonded to the surface of a resin base material are widely used as interior parts for automobiles such as door trims and front panels, or interior parts such as furniture and fittings. As a method for manufacturing such a bonded component, the soft sheet that should constitute the skin is placed between a pair of molds, and then the molds are overlapped to form the base material. Injection molding and press molding of resin materials.

Alternatively, it has been considered to mold the resin material by blow molding or the like, thereby molding and hardening the resin material, and at the same time bonding the soft sheets together. For example, the method proposed in Japanese Patent Application No. 61-044379 previously filed by the applicant of the present application is one example.

According to this manufacturing method, the skin is bonded together at the same time as the resin base material is molded, so the manufacturing equipment and manufacturing man-hours are halved compared to when the resin base material is molded and then the skin is bonded. , which has the advantage of greatly improving production efficiency.

Problems to be Solved by the Invention However, in such conventional manufacturing methods, it was not possible to wrap the skin up to the ends of the base material and bond the base material together. That is, if an attempt is made to wrap the skin up to the end of the base material and bond it together, the wrapped portion becomes undercut, making it impossible to take out the molded and hardened resin material from the mold. Therefore, the resin base material is exposed at the ends of the bonded parts obtained by such a manufacturing method, and the parts are not necessarily satisfactory as interior parts for automobiles. In addition, in order to obtain a bonded part in which the skin is bonded to the edges, it is necessary to mold the resin base material and take it out of the mold, and then manually bond the skin to the edges. Production efficiency is significantly impaired.

Means for Solving the Problems The present invention has been made to solve the above problems, and its gist is that a relatively soft skin is formed on the surface of a resin base material. A method for producing a laminated component in which the end portions are rolled up and bonded together, the method comprising: (a) having a first molding surface corresponding to the surface shape of the laminated component, and having a rolled-up molding corresponding to the rolled-up portion of the skin; preparing a first mold in which a rolling mold having a surface is movably arranged between a molding position for molding the bonded component and a retreat position for allowing removal of the bonded component; , (b
) preparing a second mold having a second molding surface corresponding to the shape of the back surface of the bonded parts; ((It) configuring the skin between the first mold and the second mold; (d) placing the first mold and the second mold on top of each other, and with the rolling mold held in the molding position, placing the soft sheet and the second mold together; (e) separating the first molding mold and the second molding mold while molding and curing the resin material that is to constitute the base material filled between the two molding surfaces and bonding the soft sheet together; The method includes the step of molding and moving the rolling mold to the retracted position to take out the resin material to which the soft sheet is bonded.

In other words, a first molding die having a first molding surface corresponding to the surface shape of the bonded parts is integrally provided with a rolling mold having a rolling molding surface corresponding to the rolling part of the skin. When molding the resin material that is to form the skin, by holding the rolling die in the molding position, the resin material is molded and hardened while the soft sheet that is to form the skin is rolled up, while the molded and hardened resin is molded. When taking out the material, the rolling die was moved to the retracted position.

Here, as a means for moving the rolling die between the molding position and the retracted position, an inclined bin provided in the second mold is used as a means for moving the rolling mold between the molding position and the retracted position. Various means can be used, such as automatically moving by engagement with an inclined surface or the like, or independently moving using a driving means such as an air cylinder. Further, it is desirable that the surface shape of the rolling molding surface of this rolling mold, that is, the rolling portion of the skin, be rounded in order to prevent skin undulation.

Moreover, injection molding, press molding (hot flow stamping), blow molding, etc. are preferably used as means for molding the resin material that constitutes the base material. As such a resin material, thermoplastic resins such as ABS and polypropylene, composite reinforcing materials thereof, etc. can be employed. The resin material may be pre-heated to a plasticized or molten state, or it may be in a solid state such as a single powder, and the appropriate form may be selected depending on the material and molding method. It will be used.

Further, the soft sheet to constitute the skin may be molded simultaneously with the molding of the resin material, or it may be preliminarily suctioned onto the first molding surface of the first mold by vacuum forming or the like prior to molding the resin material. There is no problem even if it is molded in advance. Generally, vinyl chloride sheets or films are often used as such flexible sheets, but nylon sheets are also used.

Various other skin materials such as urethane sheets, woven fabrics, non-woven fabrics, knitted fabrics, etc. pasted together, woven fabrics, non-woven fabrics, and even artificial leather can be used. .

On the other hand, when the resin material is molded and hardened, the resin material and the soft sheet are simultaneously bonded together, and in order to obtain sufficient bonding force between them, the back side of the soft sheet, that is, the resin material, is bonded to the resin material. Adhesive can also be applied to the side surfaces in advance. However, for example, if the back side of the soft sheet is lined with knitted fabric or textured, the resin material and the soft sheet may bite into each other, or due to the resin material itself or an adhesive component contained in the resin material. If sufficient bonding force can be obtained between the two, there is no need to apply an adhesive.

Effects of the Invention According to the manufacturing method according to the present invention, by molding and curing the resin material while holding the rolling die in the molding position, the skin is rolled up to the end of the resin base material and bonded together. While the bonded component is obtained, the rolling die is moved to the retracted position, so that the bonded component can be easily taken out from the first mold. Therefore, even if the edges of automobile interior parts, furniture, etc. are exposed to the public eye, the skin is bonded all the way to the edges, and the products can be produced extremely efficiently, both aesthetically and practically. become able to do so.

EXAMPLE Hereinafter, an example of the present invention will be described in detail based on the drawings.

In FIG. 1, reference numeral 10 denotes a fixed mold as a first molding mold, on which a first molding surface 12 is formed corresponding to the surface shape of a bonded part to be manufactured, for example, an automobile door trim, etc. A winding die 14 is provided at a portion corresponding to the end of the mating parts. Moreover, 16 is a movable mold as a second mold, and a second molding surface 18 corresponding to the shape of the back surface of the bonded parts is formed. This movable type 16
is arranged facing the fixed mold 10,
It is driven toward and away from the fixed mold 10 by a cylinder (not shown).

The winding die 14 is formed with a winding surface 20 corresponding to the surface shape of the end of the bonded parts. The rolled surface 20, that is, the surface shape of the end of the bonded parts, is rounded to form a product design or to prevent skin waviness. The winding mold 14 is mounted in a mounting hole 22 formed in the fixed mold 10 so as to be movable in the left and right direction in FIG. At this time, the fixed mold 10 is held at a retracted position that allows the bonded parts to be taken out from the fixed mold 10. On the other hand, the outer surface 26 of the winding mold 14 is an inclined surface that slopes inward from the fixed mold 10 toward the movable mold 16, and when the movable mold 16 is driven toward the movable mold 16, sloped surface 28
is engaged with the inclined surface 26, so that the rolling die 1
4 is moved to a molding position where the first molding surface 12 of the stationary mold 10 and the rolling molding surface 20 are continuous, as shown in FIG. Note that the outer surface 26 and the inclined surface 28 are
They are indirectly engaged with each other across the soft sheet 30 that constitutes the skin of the bonded parts.

In addition, the location and quantity of the winding molds 14 are set appropriately in consideration of the shape and usage condition of the bonded parts, and if necessary, they may be arranged at a portion corresponding to the entire circumference of the bonded parts. You can also do that.

Therefore, the movable mold 16 is driven close to the fixed mold 10 and overlapped with each other, so that the first molding surface 12. The second molding surface 18 and the rolling molding surface 20 form a product cavity 32 having the same shape as the bonded part to be manufactured. Further, a sprue 36 is formed in the fixed mold 10, and a molten resin material 34 to constitute the resin base material of the bonded parts is supplied from an injection device (not shown). The molten resin material 34 supplied to the sprue 36 is then transferred to the launch 38° movable mold 1.
The product is guided into the product cavity 32 through a gate 40 and a communication hole 42 provided in the product cavity 32 . A plurality of such product cavities 32 are formed around the sprue 36, so that a plurality of bonded parts can be manufactured at the same time. Further, 44 and 46 in FIG. 1 are both protruding pins.

Next, the operation of the manufacturing apparatus configured as above will be explained.

First, as shown in FIG. 2, in a state where the movable mold 16 is separated from the fixed mold 10, the soft sheet 30 is placed between them. This soft sheet 30 is made by lining a soft resin sheet such as a vinyl chloride sheet with a knitted fabric, and the side lined with the knitted fabric has a movable mold 6.
The movable mold 16 is disposed facing the second molding surface 18 of the movable mold 16, and is pulled toward the outer periphery with enough tension to change its shape as the movable mold 16 is driven toward the movable mold 16.

Next, the movable mold 16 is moved to the fixed mold l by a cylinder (not shown).
Move it in the direction closer to O. At this time, when the inclined surface 28 of the movable mold 16 comes to engage with the outer surface 26 of the roll-up mold 14 with the soft sheet 30 in between, the roll-up mold 14 is moved as shown in FIG. Then, as the movable mold 16 approaches, it is moved inward from the retracted position. Then, the movable mold 16 is completely overlapped with the fixed mold 10 and the molds are clamped, whereby the rolling mold 14 is held at the molding position shown in FIG. 1. In addition, the soft sheet 30
In order to facilitate the shape change, the soft sheet 30 is
Or fixed type 10. It is also possible to preheat the movable mold 16.

Thereafter, the molten resin material 34 is injected into the sprue 36 from an injection device (not shown). The molten resin material 34 is ABS,
Thermoplastic resins such as polypropylene.

Alternatively, it is made of a composite reinforcing material such as the above, and is filled between the flexible sheet 30 and the second molding surface 18 through the runner 38, the gate 40, and the communication hole 42.

As a result, the soft sheet 30 is brought into close contact with the first molding surface 12 and the rolling molding surface 20, and is molded into a shape corresponding to the surface and edges of the bonded parts to be manufactured, while the molten resin material 34 is Soft sheet 30 and second molding surface 18
injection molded between. FIG. 1 is a diagram showing this state.

Here, the soft sheet 30 has a movable mold 16 and a fixed mold 1.
When the molten resin material 34 is injected, the runner 38 is formed between them in the mold-clamped state. It will be done.

Also, a soft sheet 30 is brought into close contact with the first molding surface 12 and the rolling molding surface 20 by the molten resin material 34.
Since the molding is performed based on the heat and injection pressure of the molten resin material 34, a desired grained pattern or the like can be formed by applying mold graining to the first molding surface 12, for example.

Further, since the back surface of the soft sheet 30 is lined with a knitted fabric, the soft sheet 30 and the resin material 34 are fixed with sufficient bonding force as the resin material 34 is molded and hardened.

After the resin material 34 is cured, the movable mold 16
is moved in a direction away from the fixed mold 10. At this time,
The winding mold 14 moves into the movable mold 1 according to the biasing force of the spring 24.
6, the resin material 34 to which the soft sheet 30 is bonded is slightly held together with the rolling mold 14, but is released from the fixed mold 10 while remaining firmly attached to the movable mold 16. be done. The resin material 34 can still be deformed to some extent at this stage, and will not be damaged even if it is slightly fitted with the rolling die 14, but the rolling molding surface 20 is inclined in the direction of movement of the movable die 16. In this case, engagement with the winding mold 14 can be avoided by appropriately setting the inclination angles of the outer surface 26 and the inclined surface 28. Note that the resin material 34 in the sprue 36 and the runner 38 is also released from the fixed mold 10 while remaining fixed to the movable mold 16.

Thereafter, the ejecting pin 44 of the movable mold 1G is pushed out, so that the resin material 3 to which the soft sheet 30 is bonded
4 is released from the movable mold 16, and further, the excess soft sheet 30 on the periphery is cut off, and the resin material 34 hardened in the communication hole 42 is removed as necessary to achieve the desired bonding. Parts can be obtained. This bonded part has a soft sheet 30 up to the end of the base material made of the resin material 34.
1, that is, the epidermis is rolled up and pasted together.

Note that by pushing out the projecting pin 46, the resin material 34 fixed to the runner 38 is also removed from the movable mold 16.

According to the manufacturing method of this embodiment, as the molten resin material 34 is injected, the soft sheet 30 is integrally molded with the molten resin material 34 and bonded to each other. Compared to molding and bonding, manufacturing equipment and manufacturing man-hours are halved, significantly improving production efficiency. Moreover, the fixed type 10 has a retractable type 1.
4 is disposed, and the rolling die 14 is moved between the molding position and the retreat position to manufacture a bonded part in which the skin is rolled up to the end of the resin base material and bonded together. , a product that is fully satisfactory in terms of design and practical use is obtained, and the troublesome work of manually pasting the soft sheet 30 to the end after taking out the molded and hardened resin material 34 as in the conventional method is eliminated. Eliminate.

Although one embodiment of the present invention has been described above in detail based on the drawings, the present invention can also be implemented in other embodiments.

For example, the winding die 14 of the above embodiment is moved as the movable die 16 approaches and moves away, but the movable die 16, like the winding die 48 shown in FIG.
It is also possible to drive it by a cylinder or the like independently of the operation of. In that case, by moving the winding mold 48 to the retracted position before moving the movable mold 16 away, the resin material 34 to which the soft sheet 30 is pasted and the winding mold 48 are held together. Can be easily avoided.

Furthermore, in the above embodiment, the soft sheet 30 is placed in a state where it is pulled toward the outer periphery, but if a soft sheet with sufficient malleability is used, its peripheral edge should be fixed. There is no problem even if you do.

In addition, in the above embodiment, the soft sheet 3 lined with knitted fabric
0 is used and there is no need to apply adhesive, but if a soft sheet is used that requires adhesive to be applied in advance, the back side of the soft sheet is Adhesive will be applied to. Of course, in order to enhance the design effect, a soft sheet with a woven fabric or the like provided on the surface may be used.

Further, in the embodiment described above, the resin material 34 is injection molded, but it can also be molded by press molding, blow molding, or the like.

Further, in the above embodiment, the first mold having the first molding surface 12 corresponding to the surface shape of the bonded parts is the fixed mold 10, and the second molding mold having the second molding surface 18 corresponding to the back surface shape is movable. Although the mold 16 is used, the first mold may be a movable mold and the second mold may be a fixed mold.

Further, although the gate 40 in the above embodiment is provided within the movable mold 16 and is a so-called tunnel gate, it is of course possible to provide a normal gate at the boundary between the fixed mold 10 and the movable mold 16.

Although other examples are not given, the present invention can be implemented with various modifications and improvements based on the knowledge of those skilled in the art without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a main part of an example of a manufacturing apparatus used for carrying out the method of the present invention. FIG. 2 is a sectional view showing a state in which the movable mold of the apparatus of FIG. 1 is separated from the fixed mold. FIG. 3 is a sectional view showing a state in which the movable mold shown in FIG. 2 is driven close to the fixed mold. FIG. 4 is a sectional view showing the main parts of another manufacturing apparatus used for carrying out the method of the present invention. 10: Fixed mold (first mold) 12: First molding surface 14.48: Rolling mold 16: Movable mold (second mold)

Claims (1)

[Scope of Claims] A method for manufacturing a bonded component in which a relatively soft skin is bonded to the surface of a resin base material by wrapping around an end portion of the base material, the method of manufacturing the bonded component corresponding to the surface shape of the bonded component. A rolling mold having a first molding surface corresponding to the rolling part of the skin and a rolling molding surface corresponding to the rolling part of the skin has a molding position where the bonded component is molded and a retreat position where the bonded component is allowed to be taken out. a step of preparing a first mold movably disposed between the bonded parts; a step of preparing a second mold having a second molding surface corresponding to the shape of the back surface of the bonded parts; arranging a soft sheet to constitute the skin between the mold and the second mold; overlapping the first mold and the second mold; and placing the rolling mold in the mold. a step of molding and curing a resin material that is to constitute the base material filled between the soft sheet and the second molding surface while holding the soft sheet in position, and bonding the soft sheet; and the first molding. A bonded part comprising the step of releasing the mold and the second molding die, moving the rolling die to the retracted position, and taking out the resin material to which the soft sheet is bonded. Production method.