JP2005035244A - Method and device for manufacturing molded article provided with gathered skin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the appearance of a gathered skin covering at least a part of a base material and to simplify the manufacturing processes. <P>SOLUTION: The molded article provided with the gathered skin, in which at least a part of the surface side of the base material is covered with the gathered skin, is manufactured in the following way in a state of separating a molding mold 10 on the base material side and a molding mold 20 on the skin side from each other. A skin material 40A to be the skin 40 is held between respective molding faces 11, 21 of both molding molds in a slackening state by a holding mechanism 30. Both molding molds are made close to a position where the distance between both molding faces becomes the thickness of the molded article. The heated and melted thermoplastic material 41A to be the base material is filled between the molding face of the molding mold on the base material side and the skin material. It is cooled and hardened. It is preferable that the holding mechanism for holding the skin material is mounted to one of both molding molds and at least a plurality of parts of one side of the skin material are held at a shorter pitch p1 than a pitch p2 among a plurality of the parts. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method and an apparatus for manufacturing a molded product that is used for a door trim or interior material of a vehicle, an interior material of a building, an exterior material of furniture, and the like and that covers at least a part of the surface with a gather skin.

A gathered ornament assembly whose entire surface is covered with a gathered skin 40 is composed of a large number of pleats by gathering upper and lower edges by gather stitching on a core plate made of an iron plate to which a pad made of urethane foam or the like is bonded. In some cases, an outer skin formed with a gathered portion is covered and the edge is wound around the back side of the core plate. Alternatively, the skin material placed on a molding die that has been dug in the shape of the outer surface of the gathers is brought into close contact with the gathered shape by sucking in vacuum, and the foam material supplied to the back side of the skin material is foamed. There is a gathered ornament assembly manufactured by making it. Further, in a molded product having a gather skin on a part of the surface, a separate gather ornament assembly prepared in advance as described above is usually attached to the molded product. (See Patent Document 1 for both).
Japanese Unexamined Patent Publication No. 2000-106985 (paragraph [0002], paragraphs [0020] to [0025], paragraph [0044], FIGS. 1, 2, and 13 to 16).

  However, according to the first prior art described above, three parts of the core plate, the pad, and the skin have to be assembled manually, and the number of parts and the number of processing steps are increased, which increases the manufacturing cost. Moreover, since it is based on manual work, the quality varies and it is difficult to stabilize the quality. According to the prior art described later, such a problem is solved, but considerable pressure is applied to the mold during foam molding, and for this reason, protrusions formed on the mold to form a gather portion are formed. Since the width cannot be narrowed, the gathers are open and the appearance is not necessarily good. In addition, since the gather part is formed by mold forming, all the gathered ornament assemblies have the same shape, and the change in shape is poor.

  In either case, when a part of the surface of the base material is covered with a gather skin, the gathered ornament assembly manufactured in a separate process as described above is attached to the front side of the base material, and the number of processes is This increases the manufacturing cost. The object of the present invention is to solve each of these problems.

For this purpose, the method for producing a molded article with a gathered skin according to the present invention comprises:
In a method for producing a molded product having a gathered skin formed by covering at least a part of the front side of a base material to be molded with a gathered skin,
In the state where the base material side mold having the molding surface for molding the back side of the base material and the skin side mold having the molding surface for molding the front side of the gather skin are separated from each other, the gather skin is between the molding surfaces. A skin material holding step for holding the skin material in a sagging state;
A mold closing process in which both molds are brought close to a position where the distance between both molding surfaces becomes the thickness of the molded product while retaining the slack of the skin material;
A filling step of filling a heat-melted thermoplastic material serving as a base material between the molding surface of the base-side mold and the skin material;
It comprises a cooling and curing step of cooling and curing the filled thermoplastic material.

  In the method for producing a molded article having a gather skin described in the previous section, the skin material is preferably held in a slack state by a holding mechanism provided on either one of the two molds.

  It is preferable that the holding mechanism of the manufacturing method of the molded article provided with the gather skin described in the previous section holds a plurality of locations on at least one side of the skin material at a pitch shorter than the pitch between the locations.

  In the method for producing a molded article having a gather skin described in the preceding sections, the filling process was performed by heating and melting from the front ends of a large number of gate passages opened in the molding surface of the base-side mold after the mold closing process was completed. The thermoplastic material is injected and filled between the molding surface of the base-side mold and the skin material, and the gate passages are on both sides of the gathered portion on a line substantially perpendicular to the longitudinal direction of the gathered portion to be formed on the gathered skin. It is preferable to open to a position.

  The manufacturing method of the molded article provided with the gather skin described in each of the preceding paragraphs may sag the skin material in the longitudinal direction.

  It is preferable that the manufacturing method of the molded article provided with the gather skin described in the preceding sections covers a part of the front side of the base material.

Moreover, the manufacturing apparatus of the molded article provided with the gather skin according to the present invention,
In a manufacturing apparatus of a molded product provided with a gather skin that covers at least a part of the front side of the base material to be molded with a gather skin,
A molding surface for molding the back side of the base material is formed, and on the molding surface, a base material side molding die in which tips of a large number of gate passages for injecting a heat-melted thermoplastic material serving as a base material are opened,
A molding surface for molding the front side of the gather skin is formed facing the molding surface of the base material side molding die, and a skin side molding die provided so as to be able to approach and separate from the base material side molding die,
It is provided in any one of both molds, and is characterized by comprising a holding mechanism that holds a skin material that becomes a gather skin between both molding surfaces in a slack state.

  In the apparatus for manufacturing a molded article provided with the gather skin described in the preceding paragraph, the holding mechanism preferably holds at least a plurality of locations on one side of the skin material at a pitch shorter than the pitch between the plurality of locations.

  The gate passage of the apparatus for manufacturing a molded article having a gather skin described in the preceding two paragraphs is opened at positions on both sides of the gather portion on a line substantially perpendicular to the longitudinal direction of the gather portion to be formed on the gather skin. It is preferable.

  In the apparatus for manufacturing a molded article provided with the gather skin described in the previous three items, the gather skin preferably covers a part of the front side of the base material.

  The apparatus for manufacturing a molded article having a gather skin as described in the preceding paragraph is formed on the molding surface of the skin side mold by forming a grained protrusion located inside the outer peripheral edge of the skin material held by the holding mechanism. It is preferable to form a groove having a width wider than the grained ridge on the molding surface of the molding die at a position corresponding to the grained ridge.

  According to the method for manufacturing a molded article having a gathered skin according to the present invention, the skin material held in a slack state is sandwiched between both molding surfaces in a mold closing process and locally folded irregularly. In the subsequent filling step, the gathered portion is pressed against the molding surface of the skin-side molding die by the thermoplastic material filled between the molding surface of the base-side molding die and the folded portion is crushed without a gap. Become. Therefore, the gathered portion of the gathered skin of the molded product that has been cooled and hardened is rich in changes in shape and has a good appearance with closed gaps.

  According to the method of manufacturing a molded product having the gather skin of the present invention in which the skin material is held in a slack state by the holding mechanism provided on either one of the molding dies, the skin is between the molding surfaces. The attachment structure of the holding mechanism that holds the material in a slack state can be simplified.

  Gather of the present invention in which the skin material that is the gather skin is held in a slack state by a holding mechanism that holds at least a plurality of locations on one side of the skin material at a pitch shorter than the pitch between the plurality of locations. According to the manufacturing method of the molded product provided with the skin, the structure of the holding mechanism can be simplified.

  In the filling process, after the mold closing process is completed, the thermoplastic material heated and melted from the tips of the many gate passages opened in the molding surface of the base-side molding die is placed between the molding surface of the base-side molding die and the skin material. A method for producing a molded article having a gather skin of the present invention in which injection filling is performed and the gate passage is opened at positions on both sides of the gathered portion on a line substantially perpendicular to the longitudinal direction of the gathered portion to be formed in the gathered skin According to the above, the skin material sandwiched between the two molding surfaces in the mold closing process and folded at an irregular position is supplied from the gate passages opened on both sides thereof in the subsequent filling process. By the thermoplastic material, it is swept toward the middle position of the gate passages on both sides. Therefore, at the end of the filling process, each folded portion approaches the intermediate position between the gate passages on both sides thereof, so that each gather portion formed by each folded portion has a reduced bending as a whole and is generally at a predetermined pitch. They are arranged parallel to each other. Therefore, although the details are irregular and varied, a gathered portion having a good appearance which is generally aligned as a whole can be obtained.

  According to the method for producing a molded article having a gather skin of the present invention in which the skin material is slackened in the longitudinal direction, the gather skin formed on the surface side of the base material is in a direction orthogonal to the relatively preferred longitudinal direction. An extending gather part is formed.

  According to the method for producing a molded article provided with the gathered skin of the present invention in which the gathered skin covers a part of the front side of the base material, the molded product in which a part of the front side of the base material is covered with the gathered skin is continuous. Since it can be manufactured by only a series of processes, the number of processes is reduced and the manufacturing cost is reduced compared to the above-described conventional technique in which a gathered ornament assembly manufactured in a separate process is mounted on the front side of the base material. Can be made.

  Further, according to the apparatus for manufacturing a molded article provided with the gather skin of the present invention, the skin material held between both molding surfaces in a loose state by the holding mechanism provided on either one of the two molds, Due to the approach of both molds, the skin is sandwiched between the two molding surfaces and folded locally and irregularly, and the outer skin is made of a thermoplastic material injected from a large number of gate passages to the molding surface of the base-side mold. The portion that is pressed against the molding surface of the side mold and folded is a gathered portion that is crushed without a gap. Therefore, the gathered portion of the gathered skin of the molded product that has been cooled and hardened is rich in changes in shape and has a good appearance with closed gaps. Further, since the holding mechanism for holding the skin material in a slack state between the two molding surfaces is provided in either one of the two molding dies, the mounting structure of the holding mechanism can be simplified.

  According to the apparatus for manufacturing a molded article provided with the gather skin of the present invention, the holding mechanism holds at least a plurality of locations on one side of the skin material at a pitch shorter than the pitch between the locations. The structure can be simplified.

  According to the apparatus for manufacturing a molded article provided with the gather skin of the present invention in which the gate passage is opened at positions on both sides of the gathered portion on a line substantially perpendicular to the longitudinal direction of the gathered portion to be formed on the gathered skin. The skin material is sandwiched between both molding surfaces by the approach of both molding dies and folded at irregular positions, and the folded portion is formed on both sides by a thermoplastic material injected from gate passages opened on both sides. It is swept toward the middle position of the gate passage. Accordingly, at the end of injection, the folded portions approach the intermediate positions of the gate passages on both sides of the folded portions, so that the gather portions formed by the folded portions are reduced in bending as a whole and are arranged at substantially the same pitch. It will be arranged in parallel. Therefore, although the details are irregular and varied, a gathered portion having a good appearance that is generally aligned is obtained.

  According to the apparatus for manufacturing a molded article provided with the gathered skin of the present invention in which the gathered skin covers a part of the front side of the base material, the molded product in which a part of the front side of the base material is covered with the gathered skin is continuous. Since it can be manufactured by only a series of processes, the number of processes is reduced and the manufacturing cost is reduced compared to the above-described conventional technique in which a gathered ornament assembly manufactured in a separate process is mounted on the front side of the base material. Can be made.

  On the molding surface of the skin-side mold, a grained ridge located inside the outer periphery of the skin material held by the holding mechanism is formed, and on the molding surface of the substrate-side mold, grain is placed at a position corresponding to the grained ridge. According to the apparatus for manufacturing a molded article having a gathered skin according to the present invention in which a groove having a width wider than the ridge is formed, the entire circumference of the outer peripheral edge of the gathered skin covering a part of the front side of the base material is grained. It is possible to improve the appearance of the gathered skin because the outer skin is not exposed to the outer peripheral edge of the gathered skin because it is put into the grained groove formed on the base material by the ridges. Moreover, since the groove | channel part wider than a graining protrusion is formed in the molding surface of a base material side shaping | molding die in the position corresponding to a graining protrusion, the intensity | strength of a base material does not reduce by a graining groove.

  The best mode for carrying out the manufacturing method and the manufacturing apparatus of a molded article having a gather skin according to the present invention will be described below with reference to the embodiments shown in FIGS. As shown in FIG. 8, the molded product manufactured according to this embodiment is an automobile door trim in which a part on the front side of the base material 41 is covered with a gather skin 40. The outer edge of the skin material 40 </ b> A, which is the material of the gather skin 40, is hidden in the wood grain groove 42 formed in the base material 41 along the outer periphery of the gather skin 40. First, a molding apparatus for a molded product having a gather skin according to the present invention will be described with reference to FIGS.

  The molding apparatus of this embodiment is of a horizontal opening and closing type, and is a base material side molding die 10 attached to a fixed side mold support member (not shown) and a base material side attached to a movable side mold support member (not shown). It consists of a skin-side mold 20 that is close to and away from the side mold 10. Forming surfaces 11 and 21 are formed on the surfaces of the molds 10 and 20 facing each other, and peripheral surfaces 11a and 21a extending outward are formed on the outer sides of the forming surfaces 11 and 21, respectively. As shown in FIGS. 3 and 4, when the molds 10 and 20 are in the most closed state, the peripheral surfaces 11a and 21a are in contact with each other without a gap, and the gather skin is between the molding surfaces 11 and 21. A cavity for forming a molded article composed of 40 and the substrate 41 is formed.

  From the molding surface 21 of the skin-side mold 20, a narrow grained ridge 22 protrudes along a position corresponding to the grained groove 42 of the base material 41 to be molded. Further, a wide groove portion 12 is formed on the molding surface 11 of the substrate-side mold 10 along a position corresponding to the grained protrusion 22. As shown in FIG. 5, the shape of the groove 12 viewed from the skin side mold 20 side is an annular shape that is horizontally long and the upper and lower sides are almost horizontal, and the shape of the grained protrusion 22 is also the width of the groove 12. It is an annulus that passes near the center of the direction. Further, as shown in FIG. 3, the width and depth of the groove 12 are such that the gap between the grained protrusion 22 and the groove 12 in the mold-closed state is substantially the same as the distance between the molding surfaces 11 and 21. Is set to

  The base material side mold 10 is provided with a supply passage 13 for supplying a heat-melted thermoplastic material 41A (for example, a thermoplastic olefin such as polypropylene resin) to be the base material 41, and is branched from the supply passage 13 to open on the molding surface 11. A number of gate passages 14 are provided. Each gather portion 40b to be formed on the gather skin 40 is configured to extend substantially along a line extending downward from a plurality of holding mechanisms 30 (see FIG. 5) that hold the skin material 40A to be the gather skin 40. . As shown in FIG. 5, a large number of gate passages 14 opened in the molding surface 11 located inside the annular groove 12 are orthogonal to the downwardly extending lines that substantially coincide with the longitudinal direction of the gathers 40b. On the line, openings are made on both sides of each line extending downward. A number of gate passages 14 are also opened in the molding surface 11 located outside the annular groove portion 12, but the illustration is omitted in FIG. 5.

  As shown in FIGS. 1, 3, 5, and 6, a plurality of (five in the illustrated embodiment) holding mechanisms that hold the skin material 40 </ b> A along the longitudinal direction on one side of the groove 12 on the upper side. 30 is provided. The base-side mold 10 has five guide holes 15 having a vertical width similar to that of the groove 12 around the upper edge of the groove 12 on the upper side and parallel to the moving direction of the skin-side mold 20. 12 is formed at a predetermined pitch p1, and each holding mechanism 30 is guided and supported by each guide hole 15, and an operation for moving each holding block 31 forward and backward via an operating rod 32a. It consists of the device 32. The holding block 31 is formed with a notch 31a having a shape that is an extension of the upper half of the groove 12 at the retracted position shown in FIGS. 6B to 6D, and the holding block 31 is formed from the inside of the notch 31a. A holding hole 31 b penetrating the back surface of 31 is formed. The holding hole 31b has an elongated rectangular cross-sectional shape, and inserts and holds an ear piece 40a of a skin material 40A described below.

  The skin material 40A to be the gather skin 40 is a sheet rich in elasticity on the back surface of a thin sheet-like surface layer (for example, soft leather PVC having a thickness of 0.6 mm) made of a dense solid layer of a flexible thermoplastic resin. A foamed layer made of a synthetic resin foam (for example, a polyurethane resin foam sheet having a thickness of 2 mm) is laminated and bonded, and a thin nonwoven fabric (for example, a thickness of 0.1 mm) is laminated and bonded to the back surface thereof. The skin material 40A has a contour shape larger than the contour shape of the wood-grooving groove 42 by the amount of the curvature of the molding surface 11, the shrinkage allowance for gather formation, and the wood-meshing allowance into the wood-grooving groove 42, and along the upper side. The five ear pieces 40a to be inserted into the holding holes 31b of the holding blocks 31 are formed at a predetermined pitch p2. If the pitch p1 of the holding block 31 described above is smaller than the pitch p2 of the ear piece 40a and each ear piece 40a is inserted into the holding hole 31b of the holding block 31 and supported, the holding mechanism is provided in the skin material 40A. As shown by the reference numeral 40c in FIG. 2, a slack occurs between the ear pieces 40a supported by 30 to form a waveform as a whole.

  Next, a method for producing a molded product having a gather skin using the molding apparatus of the above-described embodiment will be described. This manufacturing method includes a skin material holding step, a mold closing step, a filling step for filling the thermoplastic material 41A, and a cooling and hardening step.

  First, in the skin material holding step, the holding block 31 of each holding mechanism 30 is advanced by the operating device 32 in a state where the skin-side mold 20 is separated from the base-side mold 10 as shown in FIGS. 1 and 2. (See FIG. 6 (a)), each ear piece 40a on the upper edge of the skin material 40A in which the skin material 40A is placed between the molding surfaces 11 and 21 so that the surface layer is on the skin side molding die 20 side. As shown in FIG. 5, after inserting into the holding hole 31 b of each holding block 31, the holding block 31 is moved backward by the operating device 32. As described above, since the pitch p1 of the holding block 31 is smaller than the pitch p2 of the ear piece 40a of the skin material 40A, a sag of a waveform as shown by reference numeral 40c in FIG. 2 occurs in the skin material 40A. The left and right side edges of the skin material 40A may be placed in the groove 12 as shown in FIG. The skin material 40 </ b> A is held by friction between each ear piece 40 a and each holding hole 31 b and friction of a contact portion between the skin material 40 </ b> A and the molding surface 11.

  In the subsequent mold closing process, the skin side mold 20 is moved to the base material side until the peripheral surfaces 11a and 21a of the molds 10 and 20 are brought into contact with each other while maintaining the sag of the waveform of the skin material 40A. As shown in FIGS. 2, 3, 6 (c) and 7 (a), the skin material 40 A is sandwiched between the molding surfaces 11 and 21 when the mold 10 is brought close to the holding mold 10. 30 is folded locally and irregularly by the amount of slack. In this state, the folded portion is in contact with the molding surfaces 11 and 21 of the molding dies 10 and 20 by the elasticity of the skin material 40A in a curved state, and is not crushed without a gap. If a force is applied from the direction along the molding surfaces 11 and 21, it can move.

  In the subsequent filling step, as shown in FIGS. 6 (d) and 7 (b), a thermoplastic material supplied from the ends of a large number of gate passages 14 opened in the molding surface 11 inside the annular groove 12 is provided. 41A is injected and filled between the skin material 40A and the molding surface 11, the thermoplastic material 41A is pressed against the molding surface 21 of the skin-side molding die 20, and the folded portion of the thermoplastic material 41A is crushed without any gaps. A foam layer made of a synthetic resin foam of the plastic material 41A is compressed. In addition, the thermoplastic material 41A supplied from the ends of a large number of gate passages 14 opened in the molding surface 11 which is outside the annular groove 12 is injected and filled between the molding surfaces 11 and 21 of both molds 10 and 20. The As a result, the surface of the inner portion of the thermoplastic material 41A filled between the molding surfaces 11, 21 is covered with the skin material 40A, and the surface of the outer portion of the thermoplastic material 41A is heated. The plastic material 41 </ b> A remains, and a grained groove 42 is formed by a grained ridge 22 at the boundary portion.

  Then, after the thermoplastic material 41A is cooled and hardened, if the molded product is taken out by separating the skin side molding die 20 from the base material side molding die 10, the base on the inside of the wood grain groove 42 formed by the wood grain protrusions 22 is obtained. A molded product in which the surface of the material 41 is covered with the gather skin 40 is obtained.

  According to the above-described embodiment, the inner surface of the gather skin 40 is fixed to the base material 41, and the irregularly folded portion does not open. The gathered portion 40b of the gathered outer skin 40 is rich in changes in shape and has a good appearance with closed gaps. In the above-described embodiment, the filling of the thermoplastic material 41A between the molding surface 11 and the skin material 40A and between the molding surface 11 and the molding surface 21 is performed by injection after the mold closing process is completed. The thermoplastic material 41A discharged onto the molding surface 11 by the gate passage 14 before or during the mold closing process is not limited to this, and the molding surface 11, the skin material 40A, and the molding surface 11 are discharged by the mold closing process. You may carry out by compressing and filling between the molding surfaces 21. FIG.

  In the embodiment described above, the holding mechanism 30 that holds the skin material 40A in a sagging state is provided on the base-side mold 10 side, but the holding mechanism 30 may be provided on the skin-side mold 20 side. In this case, since a separate member for attaching the holding mechanism 30 is not necessary, the attachment structure of the holding mechanism 30 can be simplified. However, the present invention is not limited to this, and a member for attaching the holding mechanism 30 may be provided separately.

  Further, in the above-described embodiment, the holding mechanism 30 holds the skin material 40A in a slack state by holding a plurality of locations on the upper side of the skin material 40A at a pitch p1 shorter than the pitch p2 between the locations. In this way, the structure of the holding mechanism 30 is simplified. However, the present invention is not limited to this, and one side may be held along the entire length so that the skin material 40A is slackened. Note that the holding mechanism 30 may hold not only one side of the skin material 40A but also two sides or the entire periphery facing each other, so that the slack of the held skin material 40A is more stable. Become.

  In the above-described embodiment, as shown in FIG. 5, the gate passage 14 opened to the inside surrounded by the annular groove 12 is on a line substantially perpendicular to a line extending downward from the holding mechanism 30. Opening is made on both sides of the extending line. In this way, the skin material 40A sandwiched between the two molding surfaces in the mold closing process and folded at an irregular position is folded in the subsequent filling process. The portion is pushed by the thermoplastic material 41A supplied from the gate passages 14 opened on both sides thereof, and moved toward the intermediate position of the gate passages 14 on both sides. Therefore, at the end of the filling process, each folded portion approaches the intermediate position between the gate passages 14 on both sides thereof, so that each gather portion 40b formed by each folded portion has a reduced bending as a whole and is generally predetermined. They are arranged parallel to each other at a pitch. Therefore, although the details are irregular and rich in change, the gathered portion 40b having a good appearance as a whole is obtained.

  In the above-described embodiment, since the skin material 40A elongated in the lateral direction is slackened in the longitudinal direction, the gather skin 40 formed on the front side of the base material 41 is in a direction orthogonal to the relatively preferred longitudinal direction. The extending gather part 40b is formed. However, the present invention is not limited to this, and the direction of the gather skin 40 and the gathered portion 40b formed thereon is arbitrary.

  In the embodiment described above, the present invention is applied to a molded product in which a part of the front side of the base material 41 is covered with the gather skin 40, and even a case where a part of the front side of the base material 41 is covered with the gather skin 40 in this way Because it is manufactured only in this process, the manufacturing cost is reduced by reducing the number of processes compared to the conventional technology described above, which is manufactured by attaching the gathered ornament assembly manufactured in a separate process to the front side of the base material. Can be made. However, the present invention is not limited to this, and can be applied to the manufacture of a molded product in which the entire front side of the base material 41 is covered with the gather skin 40.

  Further, in the embodiment described above, the grained protrusion 22 is formed on the molding surface 21 of the skin-side mold 20 on the inner side of the outer peripheral edge of the skin material 40A held by the holding mechanism 30. In this way, The entire circumference of the outer peripheral edge of the gather skin 40 covering a part of the front side of the base material 41 is put into a wood grain groove 42 formed in the base material 41 by the wood grain protrusions 22, and the outer peripheral edge of the gather skin 40 is exposed. Since it does not do, the appearance of the gather skin 40 can be improved. The molding surface 11 of the substrate-side mold 10 is formed with a groove 12 having a width wider than the grained ridge 22 at a position corresponding to the grained ridge 22, and the meat of the substrate 41 near the grained groove 42. Since the thickness does not decrease, the strength of the base material 41 does not decrease.

  In the above-described embodiment, the skin material 40A obtained by laminating the foamed layer is used, and the thickness of the foamed layer compressed during the filling process is recovered to some extent by removing it after cooling and curing. A soft feel is obtained, and the width of the grained groove 42 is smaller than the thickness of the grained protrusion 22 so that it is not noticeable.

  In the above-described embodiment, the present invention is applied to a horizontal opening / closing type molding apparatus, but the present invention is also applicable to a vertical opening / closing type molding apparatus. In the embodiment described above, the pitches p1 between the holding blocks 31 are the same as each other, and the pitches p2 between the ear pieces 40a of the gather skin 40 are also the same as each other. The pitch p2 may be varied according to the difference.

It is a longitudinal cross-sectional view in the state which separated both the shaping | molding die of the best form of the manufacturing apparatus of the molded article provided with the gather skin by this invention. It is 2-2 sectional drawing of FIG. It is a longitudinal cross-sectional view in the state which made the both molds of embodiment shown in FIG. 1 approach, and was set as the mold closing position. FIG. 4 is a sectional view taken along line 4-4 of FIG. 3. It is a front view of the base-material side shaping | molding die in the skin material holding | maintenance process of embodiment shown in FIG. FIG. 6 is a partially enlarged cross-sectional view taken along line 6-6 of FIG. 5 showing the holding mechanism and its operation of the embodiment shown in FIG. It is a partial expanded sectional view which shows the state in which the gather part of a gather skin is formed. It is a front view which shows the door trim manufactured by embodiment shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Base-material side shaping | molding die, 11 ... Molding surface, 12 ... Groove part, 14 ... Gate passage, 20 ... Skin-side shaping | molding die, 21 ... Molding surface, 22 ... Grained protrusion, 30 ... Holding mechanism, 40 ... Gather skin, 40b ... Gather part, 40A ... Skin material, 41 ... Base material, 41A ... Thermoplastic material, p1 ... Pitch of holding mechanism, p2 ... Pitch of holding part of skin material.

Claims (11)

In a method for producing a molded product having a gathered skin formed by covering at least a part of the front side of a base material to be molded with a gathered skin,
In a state where a base material side mold having a molding surface for molding the back side of the base material and a skin side molding die having a molding surface for molding the front side of the gather skin are separated from each other, between the two molding surfaces A skin material holding step of holding the skin material that becomes the gather skin in a sagging state;
A mold closing step in which the molds are brought close to a position where the distance between the molding surfaces is equal to the thickness of the molded product in a state in which the slack of the skin material is held;
A filling step of filling a heat-melted thermoplastic material to be the base material between the molding surface of the base-side mold and the skin material;
A method for producing a molded article having a gathered skin, comprising: a cooling and curing step of cooling and curing the filled thermoplastic material. 2. The method of manufacturing a molded article having a gather skin according to claim 1, wherein the skin material is held in a slack state by a holding mechanism provided in one of the two molding dies. A method for producing a molded article having a skin. In the manufacturing method of the molded article provided with the gather skin according to claim 2, the holding mechanism holds at least a plurality of places on one side of the skin material at a pitch shorter than a pitch between the plurality of places. A method for producing a molded article having a characteristic gather skin. In the manufacturing method of the molded article provided with the gather skin according to any one of claims 1 to 3, in the filling step, an opening is formed on the molding surface of the base material side molding die after the mold closing step is completed. The thermoplastic material heated and melted from the front ends of a large number of gate passages is injected and filled between the molding surface of the base material side mold and the skin material, and the gate passages are gathered portions to be formed in the gather skin. A method for producing a molded article having a gathered skin, wherein the gathered skin is opened at positions on both sides of the gathered portion on a line that is substantially perpendicular to the longitudinal direction. The manufacturing method of the molded article provided with the gather skin which the said skin material sag in the longitudinal direction in the manufacturing method of the molded article provided with the gather skin of any one of Claims 1-4. In the manufacturing method of the molded article provided with the gather skin according to any one of claims 1 to 5, the gather skin covers a part of the front side of the substrate. A method for producing a molded article having a skin. In a manufacturing apparatus of a molded product provided with a gather skin that covers at least a part of the front side of the base material to be molded with a gather skin,
A molding surface for molding the back side of the base material is formed, and on the molding surface, a base material side molding die in which tips of a plurality of gate passages for injecting a heat-melted thermoplastic material serving as the base material are opened. When,
A molding surface for molding the front side of the gather skin is formed facing the molding surface of the base material side molding die, and a skin side molding die provided so as to be close to and away from the base material side molding die,
A molded product having a gathered skin characterized by comprising a holding mechanism that is provided on either one of the two molding dies and holds the skin material serving as the gathered skin between the two molding surfaces in a sagging state. Manufacturing equipment. In the manufacturing apparatus of the molded article provided with the gather skin according to claim 7, the holding mechanism holds at least a plurality of locations on one side of the skin material at a pitch shorter than a pitch between the plurality of locations. The manufacturing method of the molded article provided with the gathered skin characterized by being. 9. The manufacturing apparatus for a molded article having a gather skin according to claim 7 or claim 8, wherein the gate passage is formed on a line substantially perpendicular to the longitudinal direction of the gather portion to be formed on the gather skin. The manufacturing method of the molded article provided with the gathered skin characterized by opening to the position used as both sides. The manufacturing apparatus of the molded article provided with the gather skin according to any one of claims 7 to 9, wherein the gather skin covers a part of the front side of the base material. A method for producing a molded article having a skin. In the manufacturing apparatus of the molded article provided with the gathered skin according to claim 10, a grained ridge located inside the outer peripheral edge of the skin material held by the holding mechanism is formed on the molding surface of the skin side mold. An apparatus for manufacturing a molded article having a gather skin, wherein a groove having a width wider than that of the grained ridge is formed on a molding surface of the base material side molding die at a position corresponding to the grained ridge.

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