WO2013114771A1

WO2013114771A1 - Molding

Info

Publication number: WO2013114771A1
Application number: PCT/JP2012/083683
Authority: WO
Inventors: 正典反本
Original assignee: 株式会社テクノクラーツ
Priority date: 2012-01-31
Filing date: 2012-12-26
Publication date: 2013-08-08
Also published as: JP2013176958A

Abstract

A molding that not only prevents the occurrence of shrinkage cavities but with which it is also possible to obtain rigidity and firm attachment strength even with a limited amount of material and to reduce the cost of the die device and achieve a more compact device using an easily molded shape. The molding (10) has, along the outer circumference of a protruding section (20), column base ribs (30) that extend in the axial direction of the protruding section, said direction intersecting with the back surface of a substrate (11), and that extend out from the base end of the protruding section (20) in the axial direction of the protruding section. The protruding section (20) is bonded via the column base ribs (30) to the back surface of the substrate (11) so that the base end is supported at a distance from the back surface. The column base ribs (30) have a shape that can be mold-released by cores (44), which release outward. The cores are separated, when the protruding section (20) is the center, from each other along the escaping direction, which intersects with the mold-release direction of the molding (10) as a whole, said mold-release direction being parallel to the axial direction of the boss.

Description

Molding

The present invention relates to a molded product in which convex portions are integrally protruded from the back surface of a plate-like substrate, for example, a molded product suitable for an interior product attached to a vehicle body such as an automobile.

Conventionally, in a molded product made of a thermoplastic resin having a plate-like base and a convex part for attaching the base to the attachment site, the surface of the base opposite to the convex part is located at the part where the convex part protrudes. A depression called a sink mark is likely to occur, which has been a problem in appearance of the product. In particular, in an interior product such as an instrument panel of an automobile, the appearance such as the absence of sink marks on the surface of the molded product is emphasized.

As such a molded product having a boss portion as a convex portion, for example, one described in Patent Document 1 is known. That is, a thick portion is provided on the bottom surface of the bottomed opening of the boss portion, and when the molten resin forming the molded product is being cooled and solidified, compressed gas is supplied to the inside of the boss portion, and the gas is used to supply the thick wall portion. The part is rolled and the vicinity of the base of the boss of the molded product is pressed against the mold to prevent sink marks.

Moreover, as shown in FIG. 11, without connecting the bottom face side of the bottomed opening part of the boss | hub part 3 directly with respect to the back surface of the plate-shaped base | substrate 2, it is plate-shaped via the base 4 provided with the hollow part. A molded product (common name; dock gate) 1 connected to the back surface of the substrate 2 is also known. The inside of the pedestal 4 is hollow, and one side surface of the pedestal 4 is widely opened, and the substantially U-shaped peripheral edge of the pedestal 4 is joined in a state of being dispersed on the back surface of the base 2.

Japanese Patent Laid-Open No. 10-086169

However, in the conventional technique described in Patent Document 1, an extra portion is formed in the molded product by forming the thick portion on the bottom surface of the bottomed opening of the boss portion, and the resin material There was a problem that the amount of use increased. In addition, in order to form a thick part sufficient to suppress sink marks, it is necessary to obtain an optimum value for the thickness of the thick part, and finding this optimum value is troublesome and takes time. There was also.

Further, in the molded product 1 provided with the pedestal 4 shown in FIG. 11, the use of the resin material is also increased by providing the pedestal 4. In addition, a slide core for forming the pedestal 4 is required separately, and it is necessary to secure a sufficient movable range of the slide core, which not only increases the cost of the mold apparatus but also substantially reduces the apparatus. As a result, there is a problem of installation in a limited space.

The present invention has been made paying attention to the problems of the prior art as described above, and not only prevents the occurrence of sink marks, but also provides rigidity and strong mounting strength with a limited amount of material. In addition, an object of the present invention is to provide a molded product that can reduce the cost of the mold device and can be made compact by an easily molded shape.

The gist of the present invention for achieving the object described above resides in the inventions of the following items.
[1] In a molded product in which convex portions are integrally projected from the back surface of a plate-like substrate,
A columnar rib provided along the outer periphery of the convex portion, extending in the axial direction of the convex portion intersecting the back surface of the base, and further extending in the axial direction of the convex portion from the base end of the convex portion. And
The convex part is bonded to the back surface in a state where the base end is supported separately from the back surface of the base body via the column base rib.

[2] The molded article according to [1], wherein a plurality of the column base ribs are arranged radially along the outer periphery of the convex portion.

[3] The molded product according to [1] or [2], wherein the columnar rib is formed as a flat plate piece having a thin cross section in which the axial direction of the convex portion is a long side.

[4] The convex portion is provided with a pedestal portion protruding outward in the entire circumferential direction on the outer periphery in the middle in the axial direction of the convex portion, and the tip end of the column base rib is connected to the pedestal portion. The molded article according to [1], [2] or [3], which is combined.

[5] The columnar ribs are released toward the outside separated from each other with the convex portion as a center along a relief direction that intersects a die-cutting direction of the entire molded product that is parallel to the axial direction of the convex portion. The molded product according to [1], [2], [3], or [4], wherein the molded product is formed into a shape that can be punched by a plurality of cores.

[6] [1], [2], [3], [4] characterized in that a concave portion that has been stealed is provided at the base end of the column base rib in order to reduce the cross-sectional area of connection to the back surface of the base. ] Or the molded article according to [5].

[7] The molded product according to [1], [2], [3], [4], [5], or [6], wherein the convex portion has a boss shape.

The present invention operates as follows.
The molded article according to the above [1] extends in the axial direction of the convex portion intersecting the back surface of the base along the outer periphery of the convex portion, and further extends in the axial direction of the convex portion from the base end of the convex portion. Has leg ribs. By this columnar rib, the rigidity of the convex portion can be enhanced. The convex portion is coupled to the back surface in a state of being supported separately from the back surface of the base via the column base rib.

Thus, the convex portion is firmly supported from the outer peripheral side through the column base rib, and can maintain high strength. Further, since the base end of the convex portion is coupled via the column base rib without directly contacting the back surface of the base body, the coupling cross-sectional area between the convex portion and the base body can be set small. Therefore, there will be no sink on the surface of the base during heat shrinkage.

According to the molded product according to [2], the columnar ribs are provided in a plurality radially arranged along the outer periphery of the convex portion. As a result, the column base rib is supported at multiple points from a plurality of locations in the radial direction, and the bonding strength of the convex portion to the substrate can be further enhanced. Further, the joint portions between the plurality of column base ribs and the back surface of the base are dispersed, the thickness of each rib can be reduced, and further the occurrence of sink marks can be prevented.

Here, as a specific shape of the columnar rib, as described in [3], it may be formed as a flat plate piece having a thin cross section in which the axial direction of the convex portion is a long side. By setting it as such a comparatively simple shape, it becomes possible to perform die cutting at the time of shaping | molding easily.

According to the molded article according to the above [4], a pedestal portion protruding outward in the entire circumferential direction is provided on the outer periphery in the axial direction of the convex portion, and the tip of the column base rib is formed on the pedestal portion. Combine them together. Thereby, not only the convex portion itself but also the coupling between the convex portion and the substrate, the mechanical strength can be further increased.

According to the molded product according to [5], the columnar rib is centered on the convex portion along a relief direction that intersects a die-cutting direction of the entire molded product that is parallel to the axial direction of the convex portion. It is formed in a shape that can be punched by a plurality of cores that are separated from each other toward the outside. Therefore, the movement stroke of each core is dispersed, and it is possible to perform die-cutting with a short stroke, simplifying and downsizing the mold apparatus configuration, enabling cost reduction and space saving demand. Can also respond.

According to the molded product described in [6], the base end of the columnar rib was provided with a stealed recess to reduce the connection cross-sectional area with respect to the back surface of the base. This recess makes it possible to set the coupling cross-sectional area between the columnar rib and the back surface of the base body to be smaller, and more reliably prevent the occurrence of sink marks.

According to the molded product described in [7], the convex portion has a boss shape. Here, the boss shape is a cylindrical protrusion with which a shaft fits, but may have a bottom, or may have a bottom and a cylindrical shape.

According to the molded product according to the present invention, not only the occurrence of sink marks is prevented, but it is possible to obtain rigidity and strong mounting strength even with a limited amount of material, and in addition, a mold apparatus with an easily molded shape. The cost can be reduced and downsizing can be realized.

It is a perspective view which shows the molded article which concerns on 1st Embodiment of this invention. FIG. 2 is a longitudinal sectional view taken along line II-II in FIG. FIG. 2 schematically shows the operation of a mold apparatus for molding a molded product according to the first embodiment of the present invention, and is a (a) longitudinal sectional view and (b) a transverse sectional view showing a state at the time of molding. (Hatching is omitted). The operation | movement of the metal mold | die apparatus which shape | molds the molded product which concerns on 1st Embodiment of this invention is shown typically, (a) longitudinal cross-sectional view and (b) cross-sectional view which show the state at the time of die cutting Yes (hatching is omitted). It is a perspective view which shows the molded product which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the molded product which concerns on 3rd Embodiment of this invention. It is a perspective view which shows the molded product which concerns on 4th Embodiment of this invention. It is a longitudinal cross-sectional view which shows the molded product which concerns on 4th Embodiment of this invention. It is a perspective view which shows the molded product which concerns on 5th Embodiment of this invention. It is a perspective view which shows the molded product which concerns on 6th Embodiment of this invention. It is a perspective view which shows the conventional molded article.

Hereinafter, various embodiments representing the present invention will be described with reference to the drawings.
1 to 4 show a first embodiment of the present invention.
As shown in FIGS. 1 and 2, the molded product 10 is formed by projecting a convex portion 20 integrally from the back surface of a plate-like substrate 11. As a material of the molded article 10, for example, a thermoplastic resin, specifically, a polypropylene resin, a polyethylene resin, an ABS resin, or the like is suitable. However, the material is not limited to such a resin, and can be molded by a mold apparatus 40 described later. All materials including metals may be used. Hereinafter, in FIGS. 1 to 4, a cylindrical boss shape type having a through hole as the convex portion 20 will be described as an example.

The illustrated molded article 10 is positioned along the surface of the attachment site and then fixed with screws from the back side of the attachment hole in the attachment site. When the molded product 10 is, for example, an automobile interior product, if it is specifically an instrument panel, it is attached to a dashboard body that is an attachment site, or if it is a door pocket, it is attached to a door trim body. Of course, the molded product 10 is not limited to this type of interior product, and the use is not particularly limited as long as the base 11 has the convex portion 20.

The substrate 11 is a flat plate having a predetermined thickness, but the shape shown in the figure is not necessarily required as a whole and may be a part. Further, the substrate 11 is not necessarily plate-shaped. The convex portion 20 has a boss shape and is a cylindrical portion provided for the purpose of stopping a screw or fitting when the base body 11 is attached to the attachment portion. The convex portion 20 is formed in a substantially cylindrical shape in the present embodiment, and the inside is a hollow portion 21 having the same circular cross section over the entire length. In addition, the cross-sectional shape of the convex part 20 may be a square or the like as long as it can be punched.

More specifically, the convex portion 20 is provided with a pedestal portion 22 projecting outward in the entire circumferential direction on the outer periphery in the middle of the third position from the upper end in the height direction. The pedestal portion 22 is substantially square in plan view, but may be formed into a circular shape or the like, and may be designed to have an advantageous shape from the viewpoint of mold processing. In addition, the size of the pedestal 22 greatly affects the rigidity. That is, the vertical and horizontal widths and thicknesses of the pedestal and the height of the position provided on the convex portion 20 are design matters that can be changed as appropriate, and may be determined according to the required strength.

The distal end (upper end) side of the outer periphery of the convex portion 20 is formed in a tapered shape that is tapered, and the proximal end (lower end) side of the pedestal portion 22 is inclined at a larger angle than the distal end side to be tapered. It is formed into a tapered shape. Column base ribs 30 are provided along the outer periphery of the convex portion 20. The four columnar ribs 30 are provided so as to be arranged radially along the outer periphery of the convex portion 20. Each columnar rib 30 extends in the direction of the boss axis (axial center of the convex portion 20) intersecting the back surface of the base 11, and further extends in the boss axis direction (axial direction of the convex portion 20) from the base end of the convex portion 20. ing.

Each columnar rib 30 is formed as a flat plate piece with a thin cross section having a long side in the boss axis direction, and extends so as to intersect at right angles around the boss axis. The distal ends of the respective column base ribs 30 are coupled so as to be continuous with one surface of the pedestal portion 22, and each column base rib 30 extends from the distal end to the proximal end extending in the boss axial direction from the proximal end of the convex portion 20. It is formed in a taper shape that spreads outward, and the width as a flat plate piece gradually increases toward the base end side. The column base ribs 30 are arranged at equal intervals in the circumferential direction of the convex portion 20.

The base ends that are the bases of the respective column base ribs 30 are respectively coupled to the back surface of the base body 11, and the convex portions 20 are supported with the base ends spaced apart from the back surface of the base body 11 through the respective column base ribs 30. In this state, it is bonded to the back surface. That is, the bottom surface at the base end of the convex portion 20 is not directly coupled to the back surface of the base body 11 and is supported in a hollow manner by the column base ribs 30. In this embodiment, four column base ribs 30 are provided. However, the number of column base ribs 30 is not limited to four as long as the shape and arrangement can be removed by a mold device 40 described later.

Such column base ribs 30 are released toward the outside separated from each other about the convex portion 20 along a relief direction intersecting with a die-cutting direction of the entire molded article 10 parallel to the boss axis direction. The shape can be removed by one core 44. That is, the molded product 10 including the columnar ribs 30 and the projections 20 is designed so that it can be easily molded by a mold apparatus 40 as shown in FIGS. FIG. 3 shows a state during molding of the molded product 10, and FIG. 4 shows a state during die cutting.

When the molded product 10 is manufactured, it can be molded by injecting a molten resin as a material into the mold apparatus 40. The mold apparatus 40 includes a fixed mold and a movable mold 41 (not shown). In a holder 42 provided in the movable mold 41, a slide member 45 for integrally supporting four divided

cores

44 and 44 surrounding the rod-shaped core 43 imitating the hollow portion 21 from the entire circumferential direction, respectively. 45 is stored. Each slide member 45 is slidable between a molding position where each core 44 surrounds the core 43 and comes into contact with each other, and a mold release position spaced outward.

In the holder 42, there is a slant groove 46 that guides each slide member 45 along the inclined direction that simultaneously moves in the mold drawing direction and the relief direction from the molding position to the mold release position when the molded product 10 is being die-cut. Is provided. Such a mold apparatus 40 is an application of the inventions disclosed in Japanese Patent Application Nos. 2008-255355 and 2007-217974 that have already been proposed by the applicant.

Next, the operation of this embodiment will be described.
As shown in FIGS. 1 and 2, the molded product 10 has four columnar ribs 30 provided along the outer periphery of the convex portion 20 and extending in the boss axis direction intersecting the back surface of the base body 11. Each columnar rib 30 can reinforce the rigidity of the protrusion 20 itself. Although the convex part 20 in this Embodiment has the hollow part 21 opened up and down, it is good also as a structure which closes the base end of the convex part 20 and is provided with a bottomed hollow part.

Further, a pedestal portion 22 that protrudes outward in the entire circumferential direction is provided on the outer periphery in the middle of the boss axis direction of the convex portion 20, and the tip ends of the column base ribs 30 are coupled so as to be continuous with one surface of the pedestal portion 22. Has been. On the other hand, the base end of each columnar rib 30 extends further in the boss axis direction than the base end of the convex portion 20, and the convex portion 20 is separated from the back surface of the base 11 via each columnar rib 30. And bonded to the back surface in a supported state.

In this way, the convex portion 20 is coupled via the column base ribs 30 without the bottom surface at the base end thereof directly contacting the back surface of the base body 11, so that the coupling between the convex portion 20 and the base body 11 is broken. The area can be set small. Therefore, there is no sink on the surface of the base 11 during heat shrinkage, and the appearance quality of the molded product 10 can be improved.

In addition, the convex portion 20 is firmly supported from the outer peripheral side by the pedestal portion 22 and the respective column base ribs 30, and can maintain high strength. In addition to the convex portion 20 itself, the convex portion 20 and the base body 11 can be maintained. The mechanical strength can be further increased with respect to the bonding with the. Further, in the present embodiment, four columnar ribs 30 are provided so as to be arranged radially along the outer periphery of the convex portion 20.

Thereby, each columnar rib 30 is supported at multiple points from a plurality of locations in the radial direction, and the bonding strength of the convex portion 20 to the base body 11 can be further enhanced. In addition, since the connecting portions between the column base ribs 30 and the back surface of the base 11 are dispersed, the thickness of the individual column base ribs 30 can be reduced, and the occurrence of sink marks can be further prevented. It becomes.

More specifically, as shown in FIG. 2, the base end side of the pedestal portion 22 of the convex portion 20 is formed into a tapered shape that is inclined at a relatively large angle. Moreover, each columnar rib 30 is formed in a taper shape extending outward from the distal end to the proximal end, and the width as a flat plate piece gradually increases toward the proximal end side. Thereby, a molding material (resin etc.) can be reduced compared with the shape where the convex part 20 is the same diameter, and extends in an axial direction. Moreover, since the larger width is ensured as it goes to the base end side of each columnar rib 30, more sufficient bond strength can be obtained. Further, since each columnar rib 30 has a simple shape, it is possible to easily perform die cutting at the time of molding described below.

Further, the columnar ribs 30 are separated from each other around the convex portion 20 along a relief direction that intersects the die-cutting direction of the entire molded product 10 that is parallel to the boss axial direction (the axial direction of the convex portion 20). The four cores 44 that are released toward the outside are formed into a shape that can be punched. Therefore, as shown in FIG. 4, the movement stroke of each core 44 is distributed in four directions, and it is possible to perform die cutting with a short stroke.

This makes it possible to simplify and miniaturize the configuration of the mold apparatus 40 for molding the molded article 10, thereby reducing costs and meeting the demand for space saving. With such a mold apparatus 40, it is possible to obtain a molded article 10 having excellent economic efficiency. In particular, according to the mold apparatus 40 shown in FIGS. 3 and 4, the cores 44 are concentrated on the movable mold 41 only through the holder 42 without being distributed to the ejector base plate and the movable mold 41. Can be set. Thereby, the mold apparatus 40 can be configured to be more compact overall.

FIG. 5 shows a second embodiment of the present invention.
The molded product 10A according to the present embodiment has the same basic configuration as the molded product 10 according to the first embodiment described above, but the specific shapes of the column base ribs 30A are slightly different. That is, the columnar rib 30 </ b> A according to the present embodiment is not tapered so as to extend outward from the distal end to the proximal end, and is formed so as to hang perpendicularly to the back surface of the base 11.

Thus, the specific shape of the columnar rib 30A is a design item that can be selected as appropriate, and may be determined according to the required strength. The number of column base ribs 30A is not limited to four. The same applies to the specific shapes of the convex portion 20 itself and the pedestal portion 22. In addition, the same code | symbol is attached | subjected to the site | part of the same kind as 1st Embodiment, and the overlapping description is abbreviate | omitted.

FIG. 6 shows a third embodiment of the present invention.
In the molded product 10B according to the present embodiment, the convex portion 20B does not include the pedestal portion 22. Also, the shape of the convex portion 20B itself is different from the convex portion 20, and the tapered shape is tapered at a certain angle from the distal end to the proximal end without changing the direction and angle of the outer peripheral taper in the middle of the height direction. It is molded into.

Further, the column base ribs 30B are provided so as to be radially arranged along the outer periphery of the convex portion 20B in the same manner as the column base ribs 30 and the column base ribs 30A, but their shapes are greatly different. Each columnar rib 30 </ b> B is formed in a taper shape that widens outward from the distal end to the proximal end, and the width as a flat plate piece increases toward the proximal end side. Thus, what is necessary is just to design the specific shape of the convex part 20B and the columnar rib 30B suitably according to a required use and intensity | strength.

Further, on the inner side of the base end of the columnar rib 30B, a concave portion 31 that is stealed to reduce the connection cross-sectional area with respect to the back surface of the base 11 is provided. The concave portion 31 is formed in a cutout shape, but may be a through hole. Such a recess 31 makes it possible to set the coupling cross-sectional area between the columnar rib 30B and the back surface of the base 11 to be smaller, and more reliably prevent the occurrence of sink marks. In addition, the same code | symbol is attached | subjected to the site | part of the same kind as 1st Embodiment, and the overlapping description is abbreviate | omitted.

7 and 8 show a fourth embodiment of the present invention.
The molded product 10C according to the present embodiment has a shape similar to that of the molded product 10B according to the third embodiment.

The outer periphery of the convex portion 20C is formed in a tapered shape that tapers from the distal end side toward the proximal end. Moreover, the hollow part 21C which has the bottom part 211 is formed in the convex part 20C. The hollow portion 21 </ b> C is formed in a shape that narrows from the opening on the tip side toward the bottom portion 211. Thereby, the thickness from the inner wall of the hollow part 21C to the outer peripheral wall of the convex part 20C is the same.

As with the column base ribs 30B of the molded product 10B according to the third embodiment, the column base ribs 30C, which are four flat plate pieces, are arranged radially along the outer periphery of the projections 20C. Is provided. Each columnar rib 30C is formed into a taper shape that extends from the front end to the base end of the convex portion 20C, extends to the base end extending in the boss axis direction, and further reaches the back surface of the base 11 and expands outward. Yes. The columnar rib 30C has a larger width as a flat plate toward the proximal end side. In addition, you may provide in the column base rib 30C the meat stealing part similar to the recessed part 31 provided in the column base rib 30B of the molded article 10B of 3rd Embodiment.

The molded product 10C having such a convex portion 20C can be manufactured in the same manner as the molded product 10.

FIG. 9 is a perspective view showing a molded product 10D according to the fifth embodiment. In the present embodiment, the convex part 20 in the molded product 10 according to the first embodiment is used as the convex part 50 and the column base rib 60 having a different shape is provided.
In addition, the same code | symbol is attached | subjected to the site | part of the same kind as 1st Embodiment, and the overlapping description is abbreviate | omitted.

The convex part 50 provided in the molded product 10D is a solid cylindrical shape. FIG. 9 shows a two-stage shape having a small diameter on the distal end side from the middle. However, the same diameter may be used from the proximal end side to the distal end side, and the diameter may increase from the proximal end side toward the distal end side. The shape may continuously change.

The base end of the convex portion 50 is coupled through a plurality of columnar ribs 60 extending from the peripheral side surface on the base end side in a direction in which the base end intersects the back surface of the opposing base 11. Each columnar rib 60 has a width that expands in the radial direction from the periphery of the convex portion 50 toward the outside. A plurality of column base ribs 60 are formed on the periphery of the convex portion 50. The column base ribs 60 are arranged at equal intervals on the periphery of the convex portion 50. The thickness of each column base rib 60 is set to be thinner than the thickness of the base body 11.

The molded product 10D having such a convex portion 50 and a plurality of column base ribs 60 can be manufactured in the same manner as the molded product 10 according to the first embodiment. It should be noted that each of the column base ribs 60 may be provided with the same portion of the meat stealing as the concave portion 31 provided in the column base rib 30B of the molded product 10B of the third embodiment.

FIG. 10 shows a sixth embodiment of the present invention. The molded product 10E according to the present embodiment is configured such that the convex portion 20 in the molded product 10 according to the first embodiment is a flat plate-shaped convex portion 70 having a large area, and has a different shape instead of the column base rib 30. Column base ribs 80 are provided. *

As shown in the figure, the convex portion 70 is formed in a flat and irregular shape having an area larger than that of the convex portion 50 or the like. The convex portion 70 is coupled to the base body 11 via a columnar rib 80 extending from the periphery of the base end facing the back surface of the base body 11. More specifically, in the columnar rib 80, a portion extending from the side surface of the base end side peripheral edge of the convex portion 70 toward the back surface of the base body 11 and a portion extending from the base end toward the back surface of the base body 11 are integrated. It has a different shape.

The thickness of the column base rib 80 is set to be thinner than the thickness of the base body 11. A plurality of such column base ribs 80 are provided at appropriate intervals on the periphery of the convex portion 70. Thereby, even if the convex portion 70 has a wide base end area that opposes the back surface of the base body 11, the base portion 11 of the convex portion 70 is supported at multiple points by the peripheral edge on the base end side. The degree of bonding with respect to can be sufficiently strong.

Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to the above-described embodiments, and the present invention can be changed or added without departing from the scope of the present invention. Included in the invention. For example, specific shapes, dimensions, materials, and the like of the base body 11, the protrusions 20, the column base ribs 30, and the like of the molded product 10 are appropriately selected according to applications. In particular, the convex portion 20 or the like may be bottomed or non-bottomed even if it has a boss shape.

Moreover, although the example applied to interior goods, such as an automobile, such as an instrument panel and a door pocket, was demonstrated as the said molded article 10, In addition, it can apply also to the molded article of various covers attached to various parts. .

The molded product according to the present invention is particularly suitable for automobile interior parts such as instrument panels and door pockets.

DESCRIPTION OF SYMBOLS 10 ... Molded product 10A ... Molded product 10B ... Molded product 10C ... Molded product 10D ... Molded product 10E ... Molded product 11 ... Base | substrate 20 ... Boss part (convex part)
20B ... Boss part (convex part)
20C ... Boss part (convex part)
DESCRIPTION OF SYMBOLS 21 ... Hollow part 21C ... Hollow part 22 ... Base part 30 ... Column base rib 30A ... Column base rib 30B ... Column base rib 30C ... Column base rib 31 ... Recess 40 ... Mold apparatus 41 ... Movable type 42 ... Holder 43 ... Medium Child 44 ... Core 45 ... Slide member 46 ... Oblique groove 50 ... Convex part 60 ... Column base rib 70 ... Convex part 80 ... Column base rib 211 ... Bottom

Claims

In the molded product (10, 10A, 10B, 10C, 10D, 10E) in which the convex portions (20, 20B, 20C, 50, 70) are integrally projected from the back surface of the plate-like substrate (11),
In the axial direction of the convex portion (20, 20B, 20C, 50, 70) provided along the outer periphery of the convex portion (20, 20B, 20C, 50, 70) and intersecting the back surface of the base (11). Further, the columnar ribs (30, 30A,...) Extend in the axial direction of the projections (20, 20B, 20C, 50, 70) from the base ends of the projections (20, 20B, 20C, 50, 70) 30B, 30C, 60, 80)
The convex portions (20, 20B, 20C, 50, 70) are spaced apart from the back surface of the base (11) at the base end via the columnar ribs (30, 30A, 30B, 30C, 60, 80). A molded product (10, 10A, 10B, 10C, 10D, 10E) which is bonded to the back surface in a supported state.
A plurality of the column base ribs (30, 30A, 30B, 30C, 60, 80) are provided so as to be radially arranged along the outer periphery of the convex portion (20, 20B, 20C, 50, 70). The molded product according to claim 1 (10, 10A, 10B, 10C, 10D, 10E).
The columnar ribs (30, 30A, 30B, 30C, 60, 80) are formed as flat plate pieces having a thin cross section in which the axial direction of the convex portions (20, 20B, 20C, 50, 70) is a long side. The molded article (10, 10A, 10B, 10C, 10D, 10E) according to claim 1 or 2.
The convex portion (20) is provided with a pedestal portion (22) protruding outward in the entire circumferential direction on the outer periphery in the axial direction of the convex portion (20), and the column base rib (30, 30A). 4. The molded article (10, 10 </ b> A) according to claim 1, wherein the tip of the joint is connected to the pedestal portion (22).
The columnar ribs (30, 30A, 30B, 30C, 60, 80) are molded products (10, 10A, 10B, 10C) parallel to the axial direction of the convex portions (20, 20B, 20C, 50, 70). , 10D, 10E) A plurality of cores that are released toward the outside separated from each other around the convex portions (20, 20B, 20C, 50, 70) along the relief direction intersecting with the entire mold release direction ( 44. The molded product (10, 10A, 10B, 10C, 10D, 10E) according to claim 1, 2, 3, or 4, wherein the molded product is formed into a shape that can be die-cut according to 44).
The base end of the column base rib (30B) is provided with a concave portion (31) stealed in order to reduce a connection cross-sectional area with respect to the back surface of the base (11). The molded article (10B) according to 4 or 5.
The molded product (10, 10A, 10B, 10C) according to claim 1, 2, 3, 4, 5 or 6, wherein the convex portion (20, 20B, 20C) has a boss shape.