JP2004358951A - Mold for multiplex molding, molding machine and multiplex injection molding process using them - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold for a multiplex molding to produce a multiplex molded article having both a tenacity of a hard resin and a cushioning property or the like of a soft resin. <P>SOLUTION: The mold for the injection molding has a primary sprue 11 and a secondary sprue 12 as a sprue, a movable side mold 4 formed by a revolving disc 4A having a circular plane opposing to the sprue and a not-revolving part 4B, a cavity comprising a primary cavity 7A with a size corresponding to a primary molded body and a secondary cavity 7B with a size corresponding to a secondary molded body both provided along the periphery of the revolving disc 4A to across a slide contact face 40 of the revolving disc 4A and the not-revolving part 4B, a means for obtaining the primary molded article by filling a primary resin into the primary cavity, a means for transferring the primary molded article into the secondary cavity 7B by a revolution of the the revolving disc 4A and a means for forming a film of a secondary resin on the surface of the primary molded article by filling the secondary resin into a gap between the secondary cavity and the primary molded article. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mold for multiple molding, a molding machine and a multiple injection molding method using the same, and in particular, to manufacture a multiple molded product by coating the surface of an injection molded resin molded product with a resin of a different material. The present invention relates to a multiple molding die, a molding machine, and a multiple injection molding method using the same.

  Two-color molding technology has been developed to produce injection molded products by combining different materials in order to enhance the design and functional added value of molded products.For example, a single injection molding machine combines different materials. Techniques for producing composite molded articles are known.

14 and 15 are explanatory views showing a conventional mold for dissimilar material injection molding, FIG. 14 is an explanatory view of a core back type mold, and FIG. 15 is an explanatory view of a core rotating type mold. .
In FIG. 14, this mold 101 has a built-in hydraulic cylinder 103 so that a sliding core 102 slides back and forth. First, the core 102 is pushed up, a primary resin (hereinafter, also referred to as plastic) is injected from the primary sprue 104, and then the secondary plastic is injected from the secondary sprue 105 into the cavity space formed by backing the core 102. Injection produces a product made of two types of plastic.

  On the other hand, in FIG. 15, the mold 106 is configured such that a movable mold plate 108 fixed to a movable plate 107 of a molding machine main body is rotatable together with the movable plate 107. After molding the primary molded product by injecting the primary plastic from the primary sprue 109, the movable mold 108 is turned over with the movable platen 107, and the secondary molded cavity for molding the primary molded product first is next. The secondary plastic is injected and filled from the secondary sprue 110 into the cavity space with the primary molded product, and a product made of two types of plastics is molded.

However, the above-mentioned conventional technique can obtain a hard plastic molded article and a different-material molded article in which a plastic made of a different material, for example, a soft plastic is mixed, but the surface of the hard plastic molded article is made of a soft plastic. To produce a double or multiple molded product having the strength of a hard plastic and the feel or feel of a soft plastic. Further, in the core rotation type mold, since the movable side mold plate needs to be rotated together with the movable platen of the molding machine main body, there is a problem that the entire apparatus becomes large and the power consumption becomes enormous. Was.
JP-A-09-76290 Japanese Patent Application No. 2000-43100

  An object of the present invention is to solve the above-mentioned problems of the prior art, and to form a different kind of plastic, for example, a soft plastic film on the surface of one plastic molded body, for example, a molded body made of hard plastic, thereby forming the hard plastic. Multiple molding molds and molding machines that can produce multiple plastic molded products having both toughness, cushioning properties of soft plastic, and high-grade appearance, and that can improve molding efficiency and save energy consumption. And a multiple injection forming method using the same.

The invention claimed in the present application to solve the above problems is as follows.
[1] A fixed-side mounting plate (1) and a movable-side mounting plate (2), and a fixed-side die plate (3), a movable-side die plate (4) and the movable-side die sandwiched between the mounting plates. A receiving plate for supporting the plate (4), a sprue penetrating the fixed-side mounting plate (1) and the fixed-side template (3), the fixed-side template (3) and the movable-side template (4); And a ejector pin extending through the movable mold plate (4) to the vicinity of the open end of the sprue and near the open end of the sprue, an ejector pin extending to the cavity, and the Z pin and the ejector pin. An ejector plate for supporting, and after filling and molding the resin injected from the sprue into the cavity, a molded product is ejected with the ejector pin and collected to form an injection molding die. Primary injection A roux (11) and a secondary sprue (12) for injecting a secondary resin are provided, and the movable mold plate (4) is rotated with a circular flat surface facing the primary sprue (11) and the secondary sprue (12). A disk (4A) and a non-rotating portion (4B) with which the rotating disk (4A) slides are formed. The primary cavity (7A) having a size corresponding to the primary molded product and a primary cavity are formed. As a secondary cavity (7B) having a size corresponding to a large secondary molded product, a sliding contact surface (40) between the rotating disk (4A) and the non-rotating portion (4B) along the outer periphery of the rotating disk (4A). ), A means for obtaining a primary molded product by filling the primary cavity (7A) with a primary resin, and a method for applying the obtained primary molded product to the secondary cavity (7B) by rotation of the rotary disk (4A). Means to move inside , Multiple mold, characterized in that a means for forming a film by secondary resin by filling a secondary resin into a gap between the secondary cavity and the primary molded article to the surface of the primary molded product.

  [2] The movable mold plate (4) extends over the sliding contact surface (40) between the rotating disk (4A) and the non-rotating portion (4B) along the outer periphery of the rotating disk (4A). A plurality of cores are provided, and among the plurality of cores, all of the first unit cores (41) on the rotating disk (4A) have the same shape and size, and the first unit cores (41) on the non-rotating portion (4B) are formed. The two unit cores have a size corresponding to the primary molded product (42) and a size corresponding to the secondary molded product larger than the primary molded product (43). A primary core (44) is formed by a second unit core (42) having a size corresponding to the primary molded product, and the first unit core (41) and a second unit core (2) having a size corresponding to the secondary molded product are formed. 43) forming a secondary core (45) on the fixed mold plate (3) in contact with the movable mold plate (4); A primary recess (46) and a secondary recess (47) having a size corresponding to the primary core (44) and the secondary core (45) are provided, and the primary core (44) and the primary recess (46) are primary molded. A secondary cavity (7B) having a size corresponding to a secondary molded product is formed by the secondary core (45) and the secondary recess (47); The mold for multiple molding according to the above [1], characterized by the following.

  [3] Means for moving the primary molded product molded in the primary cavity (7A) into the secondary cavity (7B) is a joining surface between the fixed mold plate (3) and the movable mold plate (4). A spring member for opening (27B), and a spring member for projecting a circular plane of a rotating disk (4A) supporting one end of the primary molded product by a first unit core (41) with respect to the non-rotating portion (4B). Rotating the rotating disk (4A) to move a primary molded product supported by the first unit core (41) onto a second unit core (43) having a size corresponding to a secondary molded product; Means, the fixed-side mold plate (3) and the movable-side mold plate (4) are joined to accommodate the primary molded article in the secondary cavity (7B), and the circular flat surface of the rotating disk (4A) Pressing means for pushing back to the same level as the surface of the non-rotating portion (4B) Multiple mold according to [1] or [2], wherein the door.

  [4] A spring plate for projecting the circular surface of the rotating disk (4A) against the non-rotating portion (4B) is provided on a receiving plate (4) supporting the back surface of the rotating disk (4A) and the movable mold plate (4). 5B) and / or between one end of a rotating shaft (15) of the rotating disk (4A) and a fixed shaft (20) supporting the rotating shaft (15). 3].

[5] The method according to any one of [1] to [4], wherein the primary cavity (7A) and the secondary cavity (7B) are provided symmetrically with respect to the rotation axis of the rotating disk (4A). The mold for multiple molding according to the above.
[6] A semi-disk-shaped ejector plate (17A) that rotates together with the rotating disk (4A) corresponding to the primary cavity (7A) side and the secondary cavity (7B) side of the rotating disk (4A), respectively. (17B), and a sprue runner, a gate, and a Z pin (6) and / or an ejector pin (8A-8B) for projecting a molded product corresponding to each ejector plate, and adjacent to the movable-side mounting plate (2). A rectangular ejector plate (9) is provided, and the semicircular ejector plate (17A) corresponding to the primary cavity (7A) and the semicircle corresponding to the secondary cavity (7B) are provided on the square ejector plate (9). Projecting rods (23, 24) acting on the plate-like ejector plate (17B) are attached, and act on the ejector plate (17B) on the secondary cavity side. The length of the ejection rod (24) is made longer than that of the ejection rod (23) acting on the ejector plate (17A) on the primary cavity side by an amount required for ejection of the secondary molded product. The multiple forming mold according to any one of [2] to [5].

[7] A decorative film attaching means for attaching a decorative film to the inner surface of the secondary concave portion (47) provided in the fixed side template (3) is provided, and the decorative film is used as the secondary concave portion (47). The mold for multiplex molding according to any one of the above [2] to [6], wherein a mold having a secondary resin film formed so that the surface is exposed is used.
[8] The above-mentioned [1] to [7], wherein a rotary gate (61) for cutting the gate of the primary molded product is attached to the fixed mold plate (3) or the fixed mounting plate (1). The mold for multiple molding according to any one of the above.

[9] A slit for heat insulation is provided at a boundary between a portion corresponding to the primary cavity (7A) and a portion corresponding to the secondary cavity (7B) of the fixed mold plate (3). The mold for multiple molding according to any one of [1] to [8].
[10] The multiple-molding die according to any one of [1] to [9], wherein a plurality of heat-insulating grooves are provided on a front surface or a back surface of the fixed mold plate (3).
[11] The deburring pressurized air flow passage (82) is provided at a predetermined interval on an outer peripheral portion of the secondary concave portion (47) of the fixed side mold plate (3) [2]. The mold for multiple molding according to any one of [10] to [10].

[12] A cooling or heating medium introduction path (55) and a discharge path (56) for the rotating shaft (15) fixed to the rotating disk (4A) and the fixed shaft (20) supporting the rotating shaft (15), respectively. ) Is provided to allow the introduction path and the discharge path to communicate with each other, and to supply the heat medium to the vicinity of the primary cavity (7A) or the secondary cavity (7B) of the rotating disk (4A) via the introduction path (55). The multi-molding die according to any one of the above [2] to [11], wherein a heat medium flow path for discharging the heat medium to the outside of the system via the discharge path (56) is provided.
[13] A square pin is provided on the inner surface of the first unit core (41) to reach the ridge between the side surface and the back surface of the primary molded product, and the square pin is protruded on the primary molding side, and on the secondary molding side. The multi-molding die according to any one of [2] to [12], further comprising a moving unit that pushes down to an inner surface level of the first unit core.

  [14] The rotation is performed as a primary cavity having a size corresponding to a primary molded product, a secondary cavity having a size corresponding to a secondary molded product, and a tertiary cavity having a size corresponding to a tertiary molded product. Three or an integral multiple thereof are provided at 120 ° intervals along the outer circumference of the disk (4A) so as to straddle the sliding contact surface (40) of the rotating disk (4A) and the non-rotating part (4B), A piercing pin (99) for forming a through hole for introducing a paint is provided on the surface of the primary molded product to be primary molded, and a coating film forming paint is applied to the surface of the primary molded product through the through hole in the secondary cavity. The above-mentioned [1] to [1], further comprising a supply means, and a coating forming means for coating a surface other than the coating film of the primary molded article having the coating film in the tertiary cavity with a secondary resin. 13] Multi-molding die.

[15] A paint spray nozzle for supplying a paint for forming a coating film on the surface of the primary molded article according to the above [14], wherein the nozzle body has a paint spray hole, a sleeve connected to the nozzle body, A steel ball disposed at a connection portion between the sleeve and the nozzle body, a spring member for abutting the steel ball on an open end of the sleeve to bias the paint flow path, and pressing the spring member. A paint pump comprising: a cylinder pump for overcoming pressure to eject paint from a paint injection hole through the paint passage of the sleeve and the nozzle body; and cooling means for cooling a connection portion between the nozzle body and the sleeve. nozzle.
[16] The steel ball is provided slidably in contact with the inner wall surface of the paint flow path of the nozzle body so as to be movable in the axial direction. The paint injection nozzle according to the above [15], wherein a groove is provided.

[17] The cooling means includes a shrink fit ring covering a connecting portion between the nozzle body and the sleeve, and a cooling medium circulating means for supplying a cooling medium to a space between the shrink fit ring and the nozzle body. The paint spray nozzle according to the above [15] or [16], comprising:
[18] The multi-molding die according to any one of the above [1] to [14] is provided with a primary cylinder nozzle for injecting primary plastic and a secondary cylinder nozzle for injecting secondary plastic in a vertical direction. A multi-molding apparatus, which is mounted on an injection molding machine provided at intervals.
[19] An injection molding machine for performing multiple injection molding by mounting the multiple molding die according to any one of [1] to [14], wherein a primary side cylinder nozzle for injecting primary plastic and a secondary side are provided. A multi-molding machine characterized in that secondary cylinder nozzles for injecting plastic are provided at predetermined intervals in the vertical direction.

  [20] A multiple injection molding method using the multiple molding die according to the above [1], wherein the primary resin injected from the primary sprue (11) is filled in the primary cavity (7A) to perform primary molding. Rotating the rotating disk (4A) of the movable mold plate (4) to move the primary molded product into the secondary cavity (7B), and the secondary resin is inserted into the gap between the primary molded product and the secondary cavity (7B). And forming a film made of a secondary resin on the surface of the primary molded article by filling the primary injection molded article.

  [21] A multiple injection molding method using the multiple molding die according to any of [2] to [13], wherein the primary resin injected from the primary sprue (11) is injected into the primary cavity (7A). After filling and primary molding, the joint surface between the fixed mold plate (3) and the movable mold plate (4) is opened, the gate of the primary molded product is cut off, and the rotating disk (4A) of the movable mold plate (4) is separated. ) Is projected from the non-rotating portion (4B) by a predetermined height, the primary molded product is detached from the second unit core (42) and supported by only the first unit core (41), and the rotation is performed. By rotating the disk (4A) by a predetermined angle, the primary molded product is converted into a second unit core () having a size corresponding to the secondary molded product formed on the non-rotating part (4B) of the movable mold plate (4). After moving to the position of 43), the joining surface of the fixed-side template (3) and the movable-side template (4) After closing and retracting the circular flat surface of the rotating disk (4A) to accommodate the primary molded product in the secondary cavity (7B), the secondary sprue (12) is inserted into the gap between the primary molded product and the secondary cavity (7B). A) forming a film of the secondary resin on the surface of the primary molded article by filling the secondary resin injected from the step (1).

[22] The above-mentioned [20] or [20], wherein after attaching a decorative film on the surface of the primary molded product, a coating of a secondary resin is formed on the outer peripheral portion of the decorative film and the surface of the primary molded product. 21] The multiple injection molding method according to [21].
[23] In the state where the square pin that reaches the inner surface of the first unit core to a position corresponding to the ridge between the side surface and the back surface of the primary molded product is protruded by a predetermined length from the inner surface of the first unit core, The above [20] to [22], wherein primary molding is performed with a resin, and a secondary resin film layer is formed to extend to a cutout portion of the primary molded product formed by the square pin during secondary molding. The multiple injection molding method according to any one of the above.

  [24] A multiple injection molding method using the multiple molding die according to any one of [2] to [13], wherein a pedestal (201) having a shape similar to a finished product is formed in advance. A part of the surface of the pedestal (201) is covered with a decorative film (204) to form an insert (206), and the insert (206) is fixed in the primary cavity (7A) of the multi-molding mold, After the primary resin is introduced into the primary cavity (7A) through the sprue (11) and primary-molded so as to cover portions other than the decorative coating of the insert, the fixed mold plate (3) and the movable mold plate ( 4), the gate of the primary molded product is cut off, and the circular surface of the rotating disk (4A) of the movable mold plate (4) is projected from the non-rotating portion (4B) by a predetermined height. The primary molded product is a second unit having a size corresponding to the primary molded product. The primary molded product is removed from the core (42) and supported only by the first unit core (41), and the rotary disk (4A) is rotated by a predetermined angle to allow the primary molded product to rotate in the non-rotating portion ( After moving to the position of the second unit core (43) having a size corresponding to the secondary molded product formed in 4B), the fixed side mold plate (3) and the movable side mold plate (4) are joined. After closing the surface and retracting the circular flat surface of the rotating disk (4A) to accommodate the primary molded product in the secondary cavity (7B), the secondary resin is inserted into the gap between the primary molded product and the secondary cavity (7B). And filling a portion other than the decorative coating of the primary molded product to form a secondary molded product having a decorative coating.

[25] The multiple injection molding method according to any one of [20] to [24], wherein a rotary gate (61) is used as a gate cutting device for the primary molded product.
[26] When forming the coating of the secondary resin, pressurized air for deburring is introduced into the outer peripheral portion of the secondary recess of the fixed mold plate (3). The multiple injection molding method according to any one of [25].

  [27] A cooling or heating medium introduction path (55) provided in communication with the rotating shaft (15) fixed to the rotating disk (4A) and the fixed shaft (20) supporting the rotating shaft (15). ) And a discharge path (56) to circulate a heat medium to adjust the temperature in the vicinity of the first cavity (7A) and the second cavity (7B) of the rotating disk (4A). ] The multiple injection molding method according to any of [26].

  [28] A multiple injection molding method using the multiple molding die according to the above [14], wherein the primary sprue (11) includes a primary cavity in a primary cavity having the perforated pin (99). Filling the resin to form a primary molded product having a paint introduction hole penetrating on the front and back, moving the obtained primary molded product into the secondary cavity, using a paint injection nozzle, the paint introduction hole of the primary molded product A coating is formed on the surface of the primary molded article by introducing a coating material through the secondary sprue (12) in the tertiary cavity. A) forming a secondary resin film covering a surface other than the coated film surface of the primary molded article with a coated film by using a secondary resin introduced through the step (a).

[29] The multiple injection molding method according to [28], wherein the paint spray nozzle is the paint spray nozzle according to any one of [15] to [17].
[30] The multiple injection molding method according to any of [20] to [29], wherein the multiple molding die is mounted on the multiple molding machine according to [19].

  According to the invention described in claim 1 of the present application, most of the surface of the primary molded product, for example, about 80% can be coated with the secondary resin, so that the strength of the primary resin, the feel of the secondary resin, etc. It is possible to obtain a double-molded article having both of the following characteristics.For example, by applying the present invention to a handle for opening and closing a door of an automobile, it is possible to manufacture a high-quality door handle having excellent mechanical strength, touch, and texture. it can.

According to the invention described in claim 2 of the present application, as in the above invention, a double-molded product is manufactured by forming a coating of the secondary resin in the secondary cavity on the surface of the primary molded product molded in the primary cavity. The molding efficiency can be improved, and the entire apparatus can be reduced in weight and size.
According to the invention described in claim 3 of the present application, in addition to the effects of the above invention, a double molded product can be manufactured by efficiently moving a primary molded product molded in the primary cavity to the secondary cavity.

According to the invention described in claim 4 of the present application, in addition to the effects of the above-described invention, the rotating disk of the movable mold plate can be smoothly projected from the non-rotating portion.
According to the invention described in claim 5 of the present application, the molding efficiency is further improved in addition to the effects of the above invention.
According to the invention described in claim 6 of the present application, in addition to the effects of the above-described invention, the ejection efficiency of the gate, the sprue runner, the molded product, and the like is improved.

According to the invention as set forth in claim 7 of the present application, in addition to the effects of the above invention, a multi-molded product with high added value can be obtained.
According to the invention described in claim 8 of the present application, in addition to the effects of the above invention, gate cutting efficiency is improved, and occurrence of burrs and the like can be prevented.
According to the invention described in claim 9 of the present application, in addition to the effects of the above-described invention, the thermal stress of the constituent member can be reduced.

According to the invention as set forth in claim 10 of the present application, similarly to the above invention, the thermal stress of the component can be reduced.
According to the invention as set forth in claim 11 of the present application, in addition to the effects of the above invention, it is possible to suppress the occurrence of burrs and the like in products.
According to the invention described in claim 12 of the present application, in addition to the effects of the above invention, the temperature of the rotating disk of the movable mold plate can be adjusted, and abnormal high temperature can be prevented.

According to the invention of claim 13 of the present application, in addition to the effect of the above-mentioned invention, it is possible to form the film of the secondary resin up to the back side of the portion corresponding to the first unit core of the primary molded product, so that the film strength Is improved.
According to the invention described in claim 14 of the present application, a double molded product having a painted surface can be manufactured.
According to the invention as set forth in claim 15 of the present application, it is possible to form a coating film by supplying a required amount of coating material to the surface of the primary molded article, and also to improve the paint run-out at the end of coating, thereby reducing paint leakage. It does not happen.

According to the invention as set forth in claim 16 of the present application, in addition to the effects of the above invention, it is possible to secure a paint flow path and smoothly distribute and spray paint.
According to the invention described in claim 17 of the present application, in addition to the effect of the above-described invention, it is possible to avoid curing of the paint in the paint spray nozzle.
According to the invention described in claim 18 of the present application, the free space around the molding device is wide, the operability and the operability are improved, and the degree of freedom when additional equipment is added is improved.

According to the invention described in claim 19 of the present application, the space around the molding machine can be effectively used by providing the primary cylinder nozzle and the secondary cylinder nozzle on the top and bottom with a predetermined interval.
According to the invention described in claim 20 of the present application, most of the surface of the primary molded article, for example, about 80% (the part corresponding to the second unit core) can be coated with the secondary resin, A double molded product having both the strength of the resin and the feeling of the secondary resin can be obtained.
According to the invention described in claim 21 of the present application, similarly to the above-mentioned invention, a double-molded product is manufactured by forming a coating of the secondary resin in the secondary cavity on the surface of the primary molded product molded in the primary cavity. And the molding efficiency is improved.

According to the invention described in claim 22 of the present application, in addition to the effects of the above invention, a double molded article having a decorative film can be manufactured.
According to the invention described in claim 23 of the present application, in addition to the effects of the above invention, the adhesion strength of the secondary resin film to the primary molded product can be significantly improved.
According to the invention described in claim 24 of the present application, it is possible to automatically mold a luxurious surface leather handle by attaching the genuine leather film to almost the entire circumference without discoloring or deforming the leather film.

According to the invention described in claim 25 of the present application, in addition to the effects of the above invention, stable and reliable gate cutting can be performed.
According to the invention described in claim 26 of the present application, in addition to the effects of the above invention, it is possible to prevent the occurrence of burrs and the like in a molded product.
According to the invention described in claim 27 of the present application, in addition to the effects of the above invention, the temperature of the rotating disk of the movable mold plate can be adjusted, and abnormal high temperature can be prevented.

According to the invention described in claim 28 of the present application, in addition to the effects of the above invention, a double molded article having a painted surface can be manufactured.
According to the invention described in claim 29 of the present application, in addition to the effects of the above invention, a good coating surface can be formed with an appropriate amount of ink.
According to the invention described in claim 30 of the present application, the same effect as the above invention can be obtained by using a specific molding machine.

  The present invention makes a part of a mold, specifically a part of a movable mold plate, rotatable and forms a primary cavity in order to form a heterogeneous plastic film on the surface of a plastic molded body to obtain a multiple molded product. The primary molded product molded in the inside is moved into the secondary cavity, and the secondary molded product is molded in the secondary cavity.

  1 to 5 are explanatory views showing an embodiment of a mold for multiple molding according to the present invention. FIG. 1 is a longitudinal sectional view, FIG. 2 is a partial detailed view of FIG. 1, and FIG. 1 is a plan view of the movable mold plate (4) of FIG. 1, FIG. 4 is a plan view of the fixed mold plate (3) of FIG. 1, and FIG. 5 is a schematic diagram showing functions of the mold of the present invention.

  In FIG. 1, this mold is a multi-molding mold for forming a multi-molded product by coating a surface of a plastic molded body with a dissimilar plastic, and includes a fixed-side mounting plate 1 and a movable-side mounting plate 2; The fixed-side mold plate 3, the movable-side mold plate 4, and the receiving plate that supports the movable-side mold plate 4 sandwiched between the mounting plates, and penetrate the fixed-side attachment plate 1 and the fixed-side mold plate 3. A sprue, a cavity formed at a joint between the fixed mold plate 3 and the movable mold plate 4, a Z pin extending through the movable mold plate 4 to near the opening end of the sprue and the cavity. An ejector pin that extends and an ejector plate that supports the Z pin and the ejector pin. After the plastic injected from the sprue is filled into the cavity and molded, the molded product is pushed by the ejector pin. A primary sprue 11 for injecting primary plastic and a secondary sprue 12 for injecting secondary plastic as the sprue, and the movable mold plate 4 is attached to the primary sprue 11 and A rotating disk 4A having a circular flat surface facing the secondary sprue 12 and a non-rotating portion 4B to which the rotating disk 4A slides are formed. The primary cavity 7A having a size corresponding to a primary molded product; A secondary cavity 7B having a size corresponding to a secondary molded product larger than the molded product is provided along the outer periphery of the rotating disk 4A so as to straddle the sliding contact surface 40 of the rotating disk 4A and the non-rotating portion 4B, Means for obtaining a primary molded product by filling the primary cavity 7A with a primary plastic; and obtaining the primary molded product by rotating the rotary disk 4A. It has means for moving into the cavity 7B and means for filling the gap between the secondary cavity 7B and the primary molded product with the secondary plastic to form a coating of the secondary plastic on the surface of the primary molded product. .

  8A to 8D are ejector pins, 9 is a square-shaped ejector plate, 17A and 17B are semi-disc-shaped ejector plates, 19 is a sprue runner, 20 is a fixed shaft that supports the rotating shaft 15, 21 Is a collar or thrust bearing (see FIG. 6A described later), 22 is a rod of a molding machine, 23 and 24 are protruding rods on a primary side and a secondary side, and 25 is a movable side with a fixed side template 3. Guide pins for positioning with the non-rotating portion 4B of the side template 4, 26 are guide bushes for receiving the guide pins 25, 27A is a first parting line, 27B is a second parting line, and 29 is a press. A strong coil spring, 30 is a return spring (see FIG. 2), 31 is a roll for supporting the side surface of the rotating disk 4A, 32 is a member that prevents the cavity from moving over time or The positive to, for example, a support bolt for pressing a member having a tapered surface of 8 degrees. It should be noted that guide pins for positioning the rotary disk 4A and the fixed mold plate 3 and for positioning the semi-disc-shaped ejector plates 17A and 17B and the rotary disk 4A, and a guide bush for receiving the guide pins are not shown. I have.

  In FIG. 2, one end of the primary-side ejector pin 8 </ b> D is connected to a ejector plate 35 for ejecting a primary molded product, which is confined in a rectangular plate-shaped ejector plate 9 provided so as to be adjacent to the movable-side mounting plate 2. A moving width adjustment bolt 38 extending into the movable side mounting plate 2 is fixed to the first member 36 and fixed to the second member 37. The movement width of the primary ejector pin 8D is limited to, for example, about 8 mm by the movement width adjusting bolt 38. Thereby, when the second parting line 27B is opened after the completion of the primary molding, the primary ejector pin 8D projects by the moving width together with the projection of the rotating disk 4A of the movable mold plate 4, and extrudes the primary molded product. Thereby, the primary molded product is separated from only the second unit core 42 having a size corresponding to the primary molded product without separating from the first unit core 41.

  3 and 4, the movable mold plate 4 is mainly composed of a rotating disk 4A and a non-rotating portion 4B with which the rotating disk 4A slides, and along the outer periphery of the rotating disk 4A, the movable disk 4A It has a plurality of (four in FIG. 3) cores 44 and 45 provided so as to straddle the sliding contact surface 40 with the rotating part 4B, and among the plurality of cores 44 and 45, a fourth one on the rotating disk 4A. The first unit cores 41 are all of the same shape and size, and the second unit core on the non-rotating part 4B is of a size 42 corresponding to the primary molded product and a secondary molded product larger than the primary molded product. A primary core 44 is formed by the first unit core 41 and a second unit core 42 having a size corresponding to the primary molded product, and the primary unit 44 is formed to correspond to the first unit core 41 and the secondary molded product. The secondary core 45 is formed by the second unit core 43 having a size A primary recess 46 and a secondary recess 47 corresponding to the primary core 44 and the secondary core 45 are provided on the fixed template 3 in contact with the movable template 4, respectively. A primary cavity 7A having a size corresponding to the primary molded product is formed by the primary concave portion 46, and a secondary cavity 7B having a size corresponding to the secondary molded product is formed by the secondary core 45 and the secondary concave portion 47 ( (See FIG. 4).

  Means for moving the primary molded product molded in the primary cavity 7A into the secondary cavity 7B is a spring that opens the joint surface (second parting line 27B) between the fixed mold plate 3 and the movable mold plate 4. A member (not shown), spring members 13 and 14 for projecting a circular plane of a rotating disk 4A that supports one end of the primary molded product by a first unit core 41 with respect to the non-rotating portion 4B, and the rotating disk 4A. Is rotated to move the primary molded product supported by the first unit core 41 onto the second unit core 43 having a size corresponding to the secondary molded product, and is fixed to the rotating disk (4A) as rotating means. Rotating shaft (spline shaft) 15, a timing pulley 16 attached to the rotating shaft 15, a timing belt (not shown) that is a driving means for the pulley 16, a motor with a sequence function And the fixed-side mold plate 3 and the movable-side mold plate 4 are joined to accommodate the primary molded product in the secondary cavity 7B, and the circular flat surface of the rotating disk 4A is at the same level as the surface of the non-rotating portion 4B. Pressing means for pushing back up to the maximum.

  In such a configuration, for example, an automobile door opening / closing handle as a multiple molded product is molded as follows. In other words, a hard resin, polycarbonate, as a primary plastic injected at, for example, 270 ° C. and 5 MPa (50%) from a primary cylinder nozzle of a molding machine (not shown) passes through a sprue runner of the primary sprue 11 to open its opening. It reaches the end, that is, the second parting line (P / L) 27B, which is the junction between the fixed-side template 3 and the movable-side template 4, and passes through the primary gate 48 (see FIG. 4) on the rotating disk 4A. A primary core 44 (see FIG. 3) composed of a first unit core 41 and a second unit core 42 having a size corresponding to the primary molded product on the non-rotating part 4B, and a primary recess 46 on the fixed side template 3 are constituted. The primary cavity 7A is filled, and a primary molded product (50) is molded (FIG. 5A). Next, at a cooling interval of, for example, 6 seconds, when the second parting line 27B is opened (FIG. 5 (2)), the space between the back surface of the rotating disk 4A and the receiving plate 5B supporting the movable mold plate 4 is reached. The rotating disk 4A protrudes from the surface of the non-rotating portion 4B by a predetermined width, for example, 30 mm by the action of the spring member 13 disposed at the other end and the spring member 14 disposed between the other end of the spline shaft 15 and the fixed shaft 20. The ejector pin 8D projects in the left direction in FIG. 1 by a predetermined width, for example, 5 to 10 mm, together with the ejector plate 9 by the action of the strong coil spring 29 for pressing provided on the joint surface between the movable side mounting plate 2 and the ejector plate 9. As a result, the primary molded product 50 is disengaged from the second unit core 42 provided on the non-rotating part 4B of the movable mold plate 4, and the first unit 50 on the rotating disk 4A is removed. The state of being supported only in the core 41 (FIG. 5 (3)).

Further, the operation almost at the same time as the rod 22 a predetermined length of the molding machine, i.e., the semicircular plate and the length L ₃ between the end portion and the semicircular shaped ejector plate 17A of the primary-side ejector rod 23 The protrusion (L ₂ + L ₃ ) of the gap L ₂ between the first member (right side in the figure) and the second member (left side in the figure) of the ejector plate 17 </ _b > A, for example, is protruded by 35 mm. Z-pins 6 and the ejector pin 8A connected to the first member of the ejector plate 17A is protruded by a length corresponding to L _2, the sprue runners and the gate of the primary side is discharged.

  In this state, a timing belt (not shown) is driven by, for example, a motor having a sequence function, and a timing pulley 16 and a spline shaft 15 as a rotating shaft which are fitted with the timing belt are rotated. The rotating disk 4A rotates, for example, by 180 ° C., and the primary molded product 50 supported by the first unit core 41 on the rotating disk 4A is a second unit of a size corresponding to the secondary molded product on the non-rotating part 4B. It moves to a position corresponding to the secondary core 45 including the core 43 (FIG. 5 (4)). In this state, the second parting line 27B is closed, and the primary molded product 50 is accommodated in the secondary cavity 7B (FIG. 5 (5)).

  Next, as a secondary plastic injected at, for example, 200 ° C. and 5 MPa (50%), for example, a polyester elastomer, which is a soft resin, is injected from a secondary cylinder nozzle of a molding machine (not shown). Is injected into the secondary cavity 7B through the sprue runner and the secondary gate 49 (see FIG. 4), and is filled in the gap between the primary molded product 50 and a coating of the secondary plastic on the surface of the primary molded product 50. It is formed.

Next, after a cooling interval of, for example, 6 seconds, when the second parting line 27B is opened again, the rod 22 of the molding machine is protruded by a predetermined length, that is, by (L ₂ + L ₃ ), whereby the half of the rod 22 is protruded. The Z pin 6 and the ejector pin 8A connected to the first member (the right side in the figure) of the disc-shaped ejector plate 17B are protruded by a length corresponding to (L ₂ + L ₃ ), and the secondary side sprue runner and a gate is discharged, the second member (the left side in the drawing) to the concatenated ejector pin 8B of the ejector plate 17B, 8C is protruded by a length corresponding to L _3, the secondary molded article is ejected. At this time, the ejector plate 9 and the ejector pins 8D move by, for example, about 10 mm to the left in the drawing and push out the secondary molded product by the action of the strong coil spring 29 for pressing. It protrudes out of the box and is collected as a product.

  FIG. 20 is an explanatory view showing the automobile door opening / closing handle collected as a product. FIG. 20 (A) is a diagram showing the front surface, and FIG. 20 (B) is a diagram showing the back surface. In this figure, this automobile door opening / closing handle 140 is a double-molded article in which about 80% of the total surface area of a primary molded article 141 made of polycarbonate which is a hard plastic is covered with a secondary coating 142 made of a polyester elastomer which is a soft resin. Goods.

  According to the present embodiment, the movable mold plate 4 is composed of the rotating disk 4A and the non-rotating portion 4B with which the rotating disk 4A slides, and the movable side template 4 and the non-rotating disk 4A move along the outer periphery of the rotating disk 4A. By providing the primary cavity 7A and the secondary cavity 7B so as to straddle the sliding contact surface 40 with the rotating portion 4B, the primary molding is performed by opening the second parting line 27B and rotating the rotating disk 4A after the primary molding. The product 50 is moved into the secondary cavity 7B while being fitted to the first unit core 41 on the rotating disk 4A, and the primary molded product is brought into contact with the first unit core 41 while being one-chucked. A double-molded product can be manufactured by forming a plastic film of a different material on the surface other than the above. In addition, since only the rotating disk 4A, which is a part of the movable mold plate 4, is rotatable, the entire apparatus can be reduced in size as compared with the related art in which the movable plate of the molding machine is rotated, and power consumption is significantly reduced. Can be reduced.

  Further, according to this embodiment, by selecting the primary side plastic and the secondary side plastic, respectively, different kinds of plastics can be strongly bonded, so that, for example, the strength of the primary resin and the texture of the secondary resin are matched. Thus, a double molded product excellent in strength can be obtained.

  Further, according to this embodiment, the production efficiency of the double molded product is improved, and for example, by setting the filling time of the primary plastic to 15 seconds, and the opening and closing and cooling time of the second parting line 27B to 6 seconds, One cycle is 15 + 6 + 15 + 6 = 42 seconds, and a 2 × 2 piece picking apparatus can manufacture a double molded product in two seconds in 21 seconds.

  In this embodiment, a new primary plastic is filled in the primary cavity (7A) emptied by the movement of the primary molded product at the same time as the formation of the coating on the surface of the primary molded product by the secondary plastic, Molding is performed. In addition, simultaneously with the protrusion of the secondary molded product, the sprue runner and the gate of the primary molded product are projected and discharged, and thereafter, the double molding by the primary molding and the secondary molding is performed in the same manner.

In the present embodiment, the size of the primary cavity (7A) is a size corresponding to the primary molded product, and is, for example, approximately 30 × 30 × 70 (mm ³ ). On the other hand, the size of the secondary cavity (7B) is a size corresponding to the secondary molded product, and is, for example, approximately 33 × 33 × 73 (mm ³ ).
In the present embodiment, the primary sprue and the secondary sprue are provided, for example, with the rotation axis of a rotating disk interposed therebetween.

  As shown in FIGS. 19A to 19C, the injection molding machine to which the injection mold according to the present embodiment is applied is such that the tie bar 131 corresponds to the primary sprue and the secondary sprue of the mold. A primary cylinder nozzle 132 for injecting primary plastic and a secondary cylinder nozzle 133 for injecting secondary plastic. 19A is a front view of a tie bar portion of the injection molding machine, FIG. 19B is a lateral view thereof, and FIG. 19C is a partially cutaway upward view. In the figure, the primary side cylinder nozzle 132 and the secondary side cylinder nozzle 133 are provided at predetermined intervals, for example, 100 to 150 mm in the vertical direction, in other words, in the vertical direction. As a result, the free space around the molding machine is increased, the operability is improved, and the degree of freedom in providing the incidental equipment is improved as compared with a conventional molding machine provided at intervals in the horizontal direction.

  In addition, the primary cylinder nozzle 132 and the secondary cylinder nozzle 133 are attached to the tie bar 131 at an angle α of, for example, 25 to 40 degrees in an upward view (FIG. 19C). In addition to the primary and secondary cylinder nozzles, tertiary and / or quaternary or higher cylinder nozzles may be provided.

  In the present embodiment, it is preferable that after the primary molding, the primary molded article is moved from the primary cavity to the secondary cavity, and while the secondary plastic is being filled, the cavity is always cooled to avoid an excessively high temperature state.

  In this embodiment, of the means for moving the primary molded article 50 into the secondary cavity 7B, the rotating means of the rotating disk 4A has one end fixed to the rotating disk 4A, for example, as shown in FIG. A spline shaft 15 as a rotating shaft, a fixed shaft 20 supporting the other end of the spline shaft 15, a timing pulley 16 having a spline groove fitted to the spline shaft 15, and a diagram for driving the timing pulley 16. And an omitted timing belt. The overhanging means for projecting the surface of the rotating disk 4A of the movable mold plate 4 from the surface of the non-rotating portion 4B by a predetermined height, for example, 20 to 50 mm, is, for example, a support for supporting the rear surface of the rotating disk 4A and the movable mold plate 4. A spring member 13 sandwiched between the plate 5B and / or a spring member 14 sandwiched between a fixed shaft 20 and one end of a spline rotating shaft 15 fixed to the rotating disk 4A. Reference numeral 14 constantly urges the surface of the rotating disk 4A in a direction to protrude from the surface of the non-rotating portion 4B while the second parting line 27B is closed.

  In the present embodiment, the bearing means of the rotating shaft 15 fixed to the rotating disk 4A of the movable mold plate 4 includes a receiving plate 5B supporting the movable mold plate 4 as shown in FIG. (Bearing receiver) 54 fixed to the shaft and a bearing supported by the sleeve.

  In this embodiment, it is preferable to provide a cooling medium flow path for cooling the primary cavity 7A and the secondary cavity 7B. 6A, the rotating shaft 15 and the fixed shaft 20 supporting the rotating shaft 15 are provided with a cooling medium introduction path 55 and a cooling medium discharge path 56 (see FIG. 6B) along the central axis, respectively. In addition, the cooling medium introduction path 55 of the fixed shaft 20 and the cooling medium introduction path 55 of the rotating shaft 15 are overlapped with each other by, for example, a length corresponding to a protruding width of the rotating disk 4A with respect to the non-rotating portion 4B or longer. Are connected by a communication hole 57 having an elliptical cross section. The connection between the cooling medium introduction path 55 of the fixed shaft 20 and the cooling medium introduction path 55 of the rotating shaft 15 is made, for example, by a length corresponding to the projection width of the rotating disk 4A with respect to the non-rotating portion 4B or a length longer than that. When the rotary disk 4A protrudes, the lower through hole provided in the rotating shaft 15 and the upper through hole provided in the fixed shaft 20 are separated by two pipe-shaped through holes provided apart from each other. When the rotating disk 4A is pushed back to be at the same level as the non-rotating portion 4B, the upper and lower through holes provided in the rotating shaft 15 are connected to the upper and lower through holes provided in the fixed shaft 20, respectively. You may make it communicate.

  FIG. 6B is a sectional view taken along line BB of FIG. 6A. In FIG. 6B, two cooling medium introduction paths 55 and two discharge paths 56 are provided symmetrically with respect to the rotation axis of the rotation shaft 15, and the ends thereof are provided on the movable mounting plate 2. It is connected to the cooling medium introduction passage and the discharge passage. 58 is an O-ring.

  The hot oil of, for example, 60 ° C. as a cooling medium flows into the introduction path 55 of the fixed shaft 20 through the cooling medium introduction path provided in the movable-side mounting plate 2, and passes through the communication hole 57 having an elliptical cross section to rotate the rotating shaft. No. 15 flows into the cooling medium introduction path 55, flows through the introduction path 55, flows from the front end through a cooling medium flow path (not shown), and reaches the vicinity of the cavities 7A and 7B of the rotating disk 4A. Then, the molded product is cooled and discharged out of the system via a cooling medium discharge path in the rotating disk 4A (not shown), a cooling medium discharge path 56 of the rotating shaft 15 and a cooling medium discharge path 56 of the fixed shaft 20. 53 is an O-ring for preventing liquid leakage. Although the number of O-rings is not particularly limited, for example, three O-rings are respectively provided above and below the communication hole 57 having an elliptical cross section.

In the present embodiment, it is preferable that a plurality of rods 22 of the molding machine provided so as to penetrate the movable-side mounting plate 2 are uniformly provided on the entire movable-side mounting plate in order to smoothly move the ejector plate 9. .
In the present embodiment, it is preferable to arrange collars or thrust bearings 21 at the upper and lower ends of the timing pulley 16 fitted with the spline shaft 15 to suppress the movement thereof.

  In the present invention, the first unit core 41 provided on the rotating disk 4A of the movable-side mold plate 4 and the second unit core 42 or the second unit core 42 provided on the non-rotating part 4B and having a size corresponding to the primary molded product. As shown in FIG. 7, it is preferable that the joint portion with the second unit core 43 having a size corresponding to the next molded product has a tapered surface of, for example, 5 degrees. As a result, the first unit core 41 and the second unit core 42 or 43 are uniquely and satisfactorily joined, and the occurrence of burrs or the like due to leakage of plastic from the joint is suppressed.

  In the present invention, a decorative film such as a leopard pattern or a lattice pattern is attached to the inner surface of the secondary concave portion on the fixed side template so that the surface of the decorative film contacts the inner wall surface of the secondary concave portion. By providing a decorative film sticking means, by employing the decorative film sticking means, and a secondary cavity having a secondary concave portion for forming a secondary resin coating so that the surface of the decorative film stuck is exposed. Thus, a secondary molded article having a decorative film is obtained. As the decorative film sticking means, a robot arm is preferably applied. Also, a secondary cavity having a secondary recess for forming a secondary resin film so that the surface of the decorative film is exposed is to be in close contact with the surface of the decorative film on the inner wall surface of the secondary recess and the back surface of the primary molded product. A secondary cavity having a convex portion pressed on the surface thereof and including a secondary concave portion configured to prevent the secondary resin from flowing around the surface of the decorative film. It is preferable that the decorative film is fixed to the surface of the primary molded article before filling the secondary plastic. As a means for fixing the decorative film to the surface of the primary molded product, for example, at the time of primary molding with a primary molding resin, a predetermined interval, a predetermined number of needle-like projections are formed on the outer peripheral portion of the decorative film adhered portion of the primary molded product. In addition, the decorative film can be fixed by the needle-like projections during the secondary molding with the secondary resin. This can suppress wrinkles or curling of the decorative film appearing on the surface of the secondary molded product.

  In addition to the above, as a means for fixing the decorative film, a predetermined length, for example, 2 mm, is provided on the inner surface of the secondary recess constituting the secondary cavity, at a position corresponding to the outer peripheral portion of the decorative film attached to the surface of the primary molded product. A large number of needles having a diameter of 0.5 mm are provided at predetermined intervals, for example, at intervals of 15 mm. When the second parting line 27B is closed, a needle-like hole penetrating the decorative coating with the needles is provided. It can also be fixed to a primary molded product. At this time, the tip angle of the needle-shaped object is, for example, 40 °, and the depth of the needle-shaped hole is, for example, 2 to 2.5 mm, like the thickness of the elastomer to be covered. According to this method, a needle-like hole is formed in the outer peripheral portion of the decorative film, but this is done so that the sense of quality is not impaired by applying a decorative means such as showing a thread seam. You can do it. Further, a groove having a predetermined width and a predetermined depth, for example, a groove having a width of 3 mm and a depth of 2.5 mm is provided on the outer peripheral portion of the decorative film sticking portion of the primary molded article, and after the decorative film abuts, a secondary plastic is filled in the groove. By filling, the decorative film can be stuck and fixed to the primary molded article. At this time, the introduction amount of the secondary plastic filled in the groove is a means capable of changing the cross-sectional area of the introduction line, for example, providing a part of the introduction line in a rotating disk shape, and rotating the rotating disk by a predetermined angle. It is adjusted by changing the cross-sectional area of the introduction line. By adopting such a decorative film fixing means, the quality of the secondary molded article having the decorative film is stabilized, and for example, it can sufficiently withstand a weathering test at 90 ° C. for 400 hours.

  In the present invention, it is preferable to provide the same number of primary cavities and secondary cavities, for example, two by two. Typically, the primary cavities for primary molding and the secondary cavities for secondary molding are provided with respect to the rotation axis of the rotating disk. It is provided so as to be symmetrical (relative angle = 180 degrees). In addition, when providing an additional step between triple injection molding or primary molding and secondary molding, for example, a decorative sheet sticking step for forming a decorative coating on the surface of the secondary molded article as another separate step, The relative angle between the cavities is set to 120 °, and the primary molding can be performed in the first step, the secondary molding or the decorative sheet can be attached in the second step, and the tertiary molding or finish secondary molding can be performed in the third step.

  In the present invention, a semi-disc-shaped or arc-shaped ejector plate that rotates together with the rotating disk is provided corresponding to the primary cavity side and the secondary cavity side of the rotating disk, respectively, and the primary ejector plate corresponding to the primary cavity side is provided on the primary cavity side. It is preferable that a gate for projecting the molded product and a pin for projecting the sprue runner be provided, and an ejector pin for projecting the secondary molded product to the secondary cavity side and a pin for projecting the gate and the sprue runner of the secondary molded product be provided. As a result, the gate, sprue runner, and molded product that are discharged or protruded after the molding process are integrated with the Z pin or ejector pin that acts on the gate, sprue runner, and molded product. it can.

In the present invention, another ejector plate may be provided adjacent to the movable-side mounting plate, and the ejector plate may be provided with an ejector pin for projecting the secondary molded product. This makes it possible to reduce the size of the rotating disk and the ejector plate that rotates together with the rotating disk.
In the present invention, the cavity volume corresponding to the first unit core in the primary cavity and the secondary cavity is 50% or less, preferably 30% or less, more preferably 20% or less of the entire cavity volume. As a result, the entire surface of the primary molded product at the time of secondary injection molding can be covered with a high probability, and a good multiple molded product can be obtained.

  In the present invention, it is preferable to use a rotary gate or a shearing gate as the gate cutting member. As a result, the gate can be safely and reliably turned off, and the occurrence of burrs and the like can be suppressed. As the primary resin, for example, a hard plastic such as polycarbonate having excellent mechanical strength is used, and as the secondary resin, a soft plastic having excellent flexibility such as a polyester elastomer is preferably used, A rotary gate is preferably used as a gate cutting means for a hard plastic molded product, and a shearing gate is preferably used as a gate cutting means for a soft plastic molded product.

  FIG. 8 is an explanatory diagram showing an example of a rotary gate applied to the present invention. In the figure, the rotary gate 61 has a gate groove corresponding to its diameter or radius on a circular bottom surface, and a through hole of a block 64 arranged on a joint surface with the fixed side mounting plate 1 or the fixed side template 3. A groove 62 having a predetermined width, for example, 8 to 10 mm width inclined at a predetermined angle, for example, 30 degrees, is provided on an outer peripheral portion which is in sliding contact with the inner surface, and a rope 63 fitted into the groove 62 is supported by the block 64. . In such a configuration, after the primary molding is completed and before the second parting line 27B is opened, the first parting line 27A, which is the contact surface between the fixed-side mounting plate 1 and the fixed-side mold plate 3, is set. When the block 64 is opened at a predetermined interval, for example, 15 to 20 mm, the rope ball 63 moves upward in the drawing along the groove 62 of the rotary gate 61 with the movement of the block 64, and the rotary gate 61 moves in the predetermined direction with this movement. The primary gate 48 is cut by this rotation.

  FIG. 9 is an explanatory diagram of the shearing gate. In the drawing, the upper end of the shearing gate 66 is fixed to the fixed-side mounting plate 1 by a fixing bolt 67, and a gate hole corresponding to the secondary gate 49 is provided at the lower end. In such a configuration, after the primary molding is completed and before the second parting line 27B is opened, the first parting line 27A, which is the contact surface between the fixed-side mounting plate 1 and the fixed-side mold plate 3, is set. When the fixed side mounting plate 1 is opened at a predetermined interval, for example, 15 to 20 mm, the shearing gate 66 moves upward with the upward movement of the fixed side mounting plate 1 in the drawing, whereby the gate hole at the lower end is raised, and the secondary gate is raised. 49 is cut.

In the present invention, the primary cavity side and the secondary cavity side of the fixed mold plate are always filled with plastics having different temperatures, for example, polycarbonate (75 ° C.) as the primary side plastic and polyester elastomer (40 ° C.) as the secondary side plastic. Therefore, in order to absorb the temperature difference, it is preferable to provide a heat insulating slit having a width of, for example, 2 mm at the boundary between the primary cavity side and the secondary cavity side of the fixed mold plate.
Further, it is preferable to provide a plurality of heat insulating grooves (harmonic groove) on the front surface or the rear surface of the fixed mold plate. This makes it possible to absorb the difference in thermal expansion between the primary molding plastic and the secondary molding plastic, thereby preventing distortion and deformation of the member.

  In the present invention, it is preferable to provide a depressurized pressurized air flow passage at a predetermined interval on the outer peripheral portion of the secondary concave portion of the fixed mold plate. FIG. 10 is an explanatory diagram illustrating the secondary recess 47 of the fixed-side mold plate 3. In the figure, a pressurized air flow passage 82 is provided at a predetermined interval, for example, at a distance of 5 mm in the outer peripheral portion of the secondary recess 47. 81 is a pressurized air introduction path, and 83 is an O-ring.

  In the present invention, when forming the primary molded product, as shown in FIG. 11A, the inner wall surface of the first unit core 41 reaches a portion corresponding to a ridge between the side surface and the back surface of the primary molded product. By providing a square pin 84 to be formed, forming a primary molded product with the square pin 84 protruding, and filling the secondary plastic with the square pin 84 pulled back during molding of the secondary molded product, The notch formed by the square pins 84 is filled with the secondary plastic, thereby extending the coating of the secondary plastic to a part of the back surface of the primary molded product 50 as shown in FIG. Is preferred. Thereby, peeling of the secondary film can be prevented, and the quality is stabilized.

  In the present invention, it is preferable to provide a positioning guide pin on the contact surface (P / L) between the rotating disk 4A of the movable mold plate 4 and the fixed mold plate 3. A positioning block may be provided instead of or in parallel with the guide pin. In addition, a fixed member (plalock) that fits into a cylindrical hole formed in the rotating disk 4A of the movable-side template 4 is fixed to the fixed-side template 3, and the rotating disk 4A is fixed to the surface of the non-rotating portion 4B. It can be made to function when it is made to protrude. Here, the fixing member (plalock) is the same as the one in which the resin-made outer peripheral portion expands by tightening the attached cap bolt, and thereby is fixed with predetermined strength to the wall surface of the hole formed in the target member. It works.

  FIG. 12 is an explanatory view showing a movable mold plate which is a main part of another embodiment of the present invention. In the figure, this movable side mold plate is for taking 2 × 3 pieces, and a pair of right and left cores are provided at intervals of 120 degrees along the outer circumference of the rotary disk 4A. The plate also has recesses corresponding to the six cores. In the figure, reference numeral 71 denotes a first unit core, 72 denotes a second unit core having a size corresponding to a primary molded product, 73 denotes a second unit core having a size corresponding to a secondary molded product, and 74 denotes a tertiary molded product. The second unit core has a size corresponding to a product. Then, the primary core 75 is composed of the first unit core 71 and the second unit core 72 corresponding to the size of the primary molded product, and the second unit core 73 having a size corresponding to the first unit core 71 and the secondary molded product. A secondary core 76 is formed by the first unit core 71 and a second unit core 74 having a size corresponding to the tertiary molded product. Also, the fixed side template 3 not shown is formed with primary recesses, secondary recesses, and tertiary recesses having sizes corresponding to the primary core 75, the secondary core 76, and the tertiary core 77, respectively. A primary cavity is formed by the primary concave portion, a secondary cavity is formed by the secondary core and the secondary concave portion, and a tertiary cavity is formed by the tertiary core and the tertiary concave portion. The other configuration is the same as or equivalent to the embodiment of FIG.

  In such a configuration, first, at the position (1) in the figure, the primary plastic is filled into the primary cavity in, for example, 15 to 17 seconds to form a primary molded product. Then, by the same means as in the above-described embodiment, the rotating disk 4A rotates rightward in the figure by 120 degrees to reach the position (2), and the primary molded product is stored in the secondary cavity, where the primary molded product is stored. For example, a tiger pattern leather film is stuck and fixed to the surface of the molded article by a decorative film sticking and fixing means not shown. In this state, the rotating disk 4A further rotates 120 degrees to reach the position (3) in the drawing, where the outer peripheral surface of the coating and the other primary molded product surface take a secondary time of, for example, 16 to 18 seconds. A plastic molded article is produced to produce a secondary molded article having the tiger pattern on the surface. Thereafter, the secondary molded product is discharged as a product every time the rotating disk 4A rotates 120 degrees, reaches the position (1) in the figure with the cavity empty, and thereafter, at a predetermined interval, for example, a primary plastic injection process After 16 to 18 seconds, 5 seconds for applying and fixing the decorative film, and 16 to 18 seconds for injecting the secondary plastic, each process is sequentially repeated to produce a secondary molded article having the decorative film.

  According to the present embodiment, the primary to tertiary cavities respectively including the first unit core, the second unit core, and the third unit core are provided at equal intervals (120-degree intervals) on the outer peripheral portion of the rotating disk, so that one-shot is achieved. A decorative film is adhered to the surface of the primary molded article while the king is being adhered, and the surface other than the decorative film is coated with a secondary plastic, so that the decorative film is exposed from the surface coated with the secondary plastic. The following molded product is obtained. In addition, the molding efficiency is good, and the required power can be saved. Furthermore, triple molding in which a primary plastic, a secondary plastic, and a tertiary plastic are respectively laminated can be performed.

  In the present embodiment, the rotation angle rotated by one rotation operation of the rotating disk 4A is not particularly limited, and the rotation angle of the movable-side template is fixed to the joint surface between the movable-side template and the fixed-side template. The number of cavities formed so as to straddle the sliding contact surface between the disk and the non-rotating portion can be changed as appropriate according to the molding conditions, and is, for example, 180 degrees, 120 degrees, and 90 degrees.

  13 (A) to 13 (D) are explanatory views showing a main part of another embodiment of the present invention, and FIG. 13 (A) is a plan view of a movable mold plate, and FIGS. 13D is a sectional view taken along line BB, line CC, and line DD in FIG. 13A, respectively. In FIG. 13A, the movable mold plate is for taking 1 × 3 pieces, and all three cores are provided at 120 ° intervals along the outer circumference of the rotating disk 4A. The template also has recesses corresponding to the three cores. In the figure, 91 is a first unit core, 92 is a second unit core of a size corresponding to the primary molded product, 93 is a second unit core of a size corresponding to the primary molded product with a coating, 94 is It is a second unit core having a size corresponding to a secondary molded product with a coating film. Then, the first unit core 91 and the second unit core 92 corresponding to the size of the primary molded product form a primary core 95, and the first unit core 91 and the second unit having a size corresponding to the primary molded product with a coating film are formed. A secondary core 96 is formed by the core 93, and a tertiary core 97 is formed by the first unit core 91 and the second unit core 94 having a size corresponding to the secondary molded product with a coating film. Also, the fixed side template 3 not shown is formed with primary recesses, secondary recesses, and tertiary recesses having sizes corresponding to the primary core 95, the secondary core 96, and the tertiary core 97, respectively. A primary cavity is formed by the primary concave portion, a secondary cavity is formed by the secondary core and the secondary concave portion, and a tertiary cavity is formed by the tertiary core and the tertiary concave portion. The other configuration is the same as or equivalent to the embodiment of FIG.

  In such a configuration, in the position (1), primary molding is performed by using, for example, polycarbonate as the primary plastic and setting the fixed-side mold plate temperature to, for example, 90 ° C. At this time, the perforating pin 99 is arranged so as to pass through the cavity from the second unit core 92, and a through-hole for introducing paint is provided in the primary molded product 50 (see FIG. 13B). Next, the primary molded product having the paint introduction through hole is moved to the secondary cavity in the same manner as in the above embodiment, and the paint introduction provided on the second unit core 93 having a size corresponding to the primary molded product with a coating film is performed. The paint is introduced through the hole 100 at a pressure of, for example, 3.5 to 4.0 MPa using, for example, a press-fitting special thermoelectric pipe (with a paint temperature sensor) having a tip diameter of 1.5 to 2.0 φ. A red coating film 90 having a thickness of, for example, 0.05 to 0.08 mm is formed on the surface (see FIG. 13C). It is desirable that the shape of the pipe at the tip of the paint entry portion of the press-fitting pipe be a sharp shape (sharp angle) on the inner peripheral surface in order to make the paint easier to cut. Next, the obtained coated molded primary molded article 50 is moved into the tertiary cavity in the same manner as in the above-described embodiment, and the coating is left here, and the other surface is made of a second plastic, for example, an elastomer of polyester. The coating 86 is formed, and a secondary molded article with a coating film is obtained.

  According to this embodiment, an arbitrary coating film is formed on the surface of the primary molded article while one chucking is being performed, and a coating film of a secondary plastic is formed so that the coating film is exposed. Subsequent molded articles can be manufactured. In addition, the primary molded article with a coating film may be collected as a final product without forming a coating film of the secondary plastic.

  In the present embodiment, the secondary core 96 in the step of forming the coating film (position (2)) is processed to have an outer peripheral dimension in consideration of the contraction of the outer periphery of the primary molded product. The paint introduced through the introduction through-hole is adjusted so as not to flow to other than the paint application surface.

Next, a paint spray nozzle applied to the present embodiment will be described.
16A and 16B are explanatory views of the paint spray nozzle, FIG. 16A is a longitudinal sectional view thereof, and FIG. 16B is a sectional view taken along line BB of FIG. 16A. In FIG. 16A, the paint spray nozzle includes a nozzle body 112 having a paint spray hole 111, a sleeve 113 connected to the nozzle body 112 by, for example, screwing, and a connection between the sleeve 113 and the nozzle body 112. A steel ball 114 disposed in the portion, a spring member 115 for abutting the steel ball 114 against the open end of the sleeve 113 to urge the paint channel 116 to be closed, and a pressing force of the spring member 115. A cylinder pump (not shown) for overcoming and injecting the paint from the paint injection hole 111 through the sleeve 113 and the paint passage 116 of the nozzle body 112, and a part of a cooling means for cooling a connection portion between the nozzle body 112 and the sleeve 113 And a shrink-fit ring 117 as the main body. Mouth 135 and an outlet 136 are provided. 137 is an O-ring.

  In FIG. 16B, for example, three paint grooves 118 are uniformly provided along the axial direction on the inner wall surface of the paint flow passage 116 of the nozzle body 112, and the pressurization supplied by a cylinder pump is provided. The paint overcomes the pressing force of the spring member 115 to secure a flow passage when the steel ball 114 is pushed into the paint flow passage 116 of the nozzle body 112 (to the left in FIG. 16A). ing.

  As shown in FIG. 13, for example, the paint spray nozzle 120 having such a configuration is provided with a coating film provided in the non-rotating portion 4B of the movable mold plate 4 of the 1 × 3 multi-molding die. It is arranged in the second unit core 93 having a size corresponding to the attached primary molded product (see FIG. 13C).

  FIG. 17 is an explanatory diagram showing a second unit core (hereinafter, also simply referred to as a second unit core) having a size corresponding to the primary molded product with a coating film, to which the paint spray nozzle 120 is attached. In FIG. 17, in the previous step, a through-hole 119 for introducing paint is formed, and the primary molded product 50 that has moved into the secondary cavity formed by the second unit core 93 and the corresponding secondary core 96 and the like. The tip of the paint spray nozzle 120 is inserted into the through hole 119, and a coating film 90 is formed on the surface of the primary molded product 50 as follows. That is, the paint is sprayed from a cylinder pump (not shown) of the paint spray nozzle 120 at a pressure of, for example, 3.5 to 4.0 MPa in a direction indicated by an arrow 121, and is cooled by a cooling unit including a shrink fit ring 117. The temperature-controlled pressurized paint overcomes the pressing force of the spring member 115, moves the steel ball 114 upward in the drawing, flows into the nozzle body 112, and flows into the inner wall surface of the paint flow path 116 of the nozzle body 112. It circulates through the provided paint groove 118 (see FIG. 16), is ejected from the paint injection hole 111, and has a predetermined area between the primary molded product 50 and the secondary core 96 with a thickness of, for example, 0.13 to 0.13. It flows into the gap of 0.2 mm, and is heated to, for example, 90 to 110 ° C. by the amount of heat of the secondary core 96 and hardened to form the hard coating film 90.

  According to this paint spray nozzle, a steel ball 114 urged so as to close the paint flow path 116 of the sleeve 113 is provided at a connection portion between the nozzle body 112 and the sleeve 113, and during coating, a cyrrida pump is used. By supplying the paint so as to overcome the pressing force of the spring member 115 that urges the steel ball 114, the paint runs out smoothly when the supply of the paint is stopped, and there is no possibility that the paint leaks.

  In this paint spray nozzle, the paint flow path 116 at the tip of the nozzle is formed so as to be tapered toward the tip as shown in FIG. 18. For example, when the diameter of the paint spray hole 111 is 2 mmφ, It is preferable that the length L of the straight pipe portion 123 having the same diameter at the foremost portion is 0.1 to 0.2 mm. If the length of the straight pipe portion 123 is longer than 0.2 mm, the running of the paint when the spraying of the paint is stopped becomes worse, and there is a possibility that poor painting may occur. In addition, it is preferable to provide a tapered surface that increases in diameter in the paint flow direction at the outlet end of the paint passage 116 of the sleeve 113, that is, at the contact end with the steel ball 114. As a result, the point of contact with the steel ball 114 becomes a circular line contact with continuous point contact, so that the paint can be more reliably sealed. The angle (taper angle) between the tapered surface and the paint flow path central axis is, for example, 30 to 45 degrees, and the taper spread angle is, for example, 60 to 90 degrees. Note that, instead of the tapered surface, a concave portion having an arc-shaped cross section into which the steel ball 114 fits may be provided.

  Further, the paint injection nozzle side of the paint introduction through-hole 119 provided in the primary molded article 50 has a tapered shape gradually tapering from the inlet to the center so as to fit with the taper at the tip of the paint injection nozzle 120. It has become. Thereby, paint leakage from the fitting portion can be prevented. Further, the coating film forming surface side of the through hole 119 has a tapered shape whose diameter gradually increases from the center to the outlet. As a result, a force that presses the entire coating surface of the primary molded article 50 downward in FIG. 17 acts on the paint sprayed from the paint spray nozzle 120, and the thickness of the coating film is easily secured. Further, a chamfered surface 122 is provided around the exit opening end of the through hole 119 so as to further increase the hole diameter. As a result, the force (coating pressure) of pressing down the painted surface of the primary molded article 50 with the paint in the downward direction in FIG. 17 acts more evenly on the entire painted surface, and a coating film having a uniform thickness is easily formed.

  The paint applied to the paint spray nozzle is a paint that is excellent in fluidity and curability, is efficiently cured by the heat of the mold, cures in a short time, and converts to 100% solids. Those that do not contain and do not emit volatile organic matter (VOC) into the atmosphere are preferably used. As such a coating material, for example, one having a viscosity of 1000 to 5000 (mPa · s), a mixing ratio of main agent / curing agent: 100/2 to 3, and a standard curing time of 60 seconds at 90 ° C. and about 20 seconds at 110 ° C. (For example, Pluglas # 8000 manufactured by Dainippon Paint Co., Ltd.).

  The gap between the primary molded product 50 and the secondary core 96 for securing the thickness of the coating film 90 is, for example, provided on the inner wall surface of the secondary core at a depth corresponding to the thickness of the coating film, e.g. It is ensured by providing a notch of 13 to 0.2 mm. Further, the paint introduction through-hole 119 of the primary molded product 50 is formed by a correspondingly shaped projection (hole-forming pin) provided in the primary cavity at the time of the primary molding. Furthermore, a glossy coating film or a textured coating film can be obtained by subjecting the inner surface of the secondary core for forming a coating film to special processing as necessary.

  Next, still another embodiment of the present invention will be described with reference to FIGS. This embodiment relates to a method of manufacturing an automobile door opening / closing handle (hereinafter, simply referred to as a handle) in which almost all of a portion touched by a human finger is covered with a genuine leather film. In this method, a genuine leather film is used as a decorative film.

  FIG. 21 is a perspective view of a pedestal used in the present embodiment, and FIG. 22 is an explanatory diagram of a genuine leather film coated on the pedestal 201. In FIG. 21, the pedestal 201 is formed by injection molding of, for example, a polycarbonate (PC), acrylonitrile, butadiene, styrene copolymer (ABS), polybutylene terephthalate (PBT), etc. It has a similar shape, and approximately half thereof has a U-shaped cross section with a hollow inside, and has a diameter of 1.2 to 1.5 φ at predetermined intervals, for example, an interval of 50 to 60 mm, and a height along its outer periphery. A rivet projection 202 of 2 to 3 mm is provided, and between the rivet projections 202, for example, through holes 203 of 1.2 to 1.5 φ in diameter for fixing a leather film are provided at intervals of 8 to 12 mm.

  In FIG. 22, the genuine leather coating 204 is, for example, a cowhide coating cut to conform to the surface shape of the pedestal 201, and a rivet through hole for engaging with the rivet projection 202 of the pedestal 201. 205 is provided.

  The rivet through-hole 205 of the genuine leather film 204 is engaged with the rivet projection 202 of the pedestal 201 to cover the pedestal 201 so that the genuine leather film 204 is wound. For example, a pedestal genuine leather set (hereinafter, referred to as an insert) 206 as shown in FIG. FIG. 24 is a sectional view taken along line XXIV-XXIV of FIG. In FIG. 24, the head portion of the rivet projection 202 is crushed, whereby the leather film 204 is fixed to the surface of the pedestal 201.

  Next, a handle having a decorative coating is molded using the insert 206 and the multiple molding die (see FIG. 1). That is, a pedestal 201 having a shape similar to a finished product is formed in advance, and as described above, a part of the surface of the pedestal 201 is covered with a genuine leather film 204 to form an insert 206. The second parting line 27B of the multi-molding die for a handle, which is configured so that the resin does not turn around the central portion except for the peripheral portion of the film 204, is opened, and as shown in FIG. 25, the primary part of the primary cavity 7A is opened. The insert 206 is fixed in the concave portion 46 using an insert fixing needle 211 erected on the inner wall of the primary concave portion 46, and the second parting line 27B is closed. In this state, polycarbonate as a primary resin injected at, for example, 270 ° C. and 5 MPa (50%) from the primary side cylinder nozzle of the molding machine is introduced into the primary cavity 7A in the same manner as in the above embodiment, and the insert is inserted. 26 is filled so as to cover portions other than the leather coating 204, that is, to fill mainly gaps between the U-shaped space of the pedestal 201 and the first unit core of the rotating disk 4A. Is formed while being supported by the first unit core (see FIG. 5A).

  FIG. 27 is an explanatory diagram viewed from the direction of arrow A in FIG. In FIG. 27, the primary molded product 207 is supported by a first unit core constituting a primary cavity 7A (not shown) by a fitting portion 213 with the first unit core.

  In the primary molded article 207, as shown in a cross-sectional view in FIG. 28, the primary resin is also press-fitted into the through-hole 203 for fixing the leather film provided on the pedestal 201, and the leather film 204 is spotted outward. For example, a hole having a depth of 3 mm and a diameter of 1.2 to 1.5 φ is provided in advance at a position facing the through-hole 203 of the primary cavity 7A so as to spot the surface of the genuine leather film 204. A convex portion 212 is formed, and thereby the joint between the pedestal 201 and the genuine leather film 204 becomes stronger.

  After the primary molding is completed, if the second parting line 27B is opened at intervals of, for example, 6 to 8 seconds (see FIG. 5B), the rotation is performed by the action of the spring member as in the above-described embodiment. At the same time that the disk 4A protrudes by a predetermined width, for example, 30 mm from the non-rotating portion 4B, the primary molded product comes off the second unit core 42 provided on the non-rotating portion 4B of the movable mold plate 4, and the disk 4A (Refer to FIG. 5C). At substantially the same time as the above operation, the primary sprue runner and the gate are discharged similarly to the above embodiment.

  In this state, the rotating disk 4A is rotated by, for example, 180 ° in the same manner as in the above embodiment, and the primary molded product supported by the first unit core 41 on the rotating disk 4A is subjected to the secondary molding on the non-rotating portion 4B. It moves to the position corresponding to the secondary core 45 including the second unit core 43 of the size corresponding to the product (see FIG. 5 (4)), the second parting line 27B is closed, and the primary molded product is It is accommodated in the cavity 7B.

Next, a polyester elastomer, for example, a soft resin, as a secondary resin injected at, for example, 200 ° C. and 5 MPa (50%) is introduced from a secondary cylinder nozzle of the molding machine, and the genuine leather of the primary molded product is introduced. The secondary forming is performed so as to cover a portion other than the surface except the outer peripheral portion of the coating 204, in particular, a needle hole (needle mark) 208 remaining on the surface of the insert 206.
After the completion of the secondary molding, at a cooling interval of, for example, 6 to 8 seconds, the second parting line 27B is opened again, and the sprue runner and the gate on the secondary side are discharged similarly to the above-described embodiment. At the same time, the secondary molded product is collected as a product.

  FIG. 29 is a perspective view of a handle having a decorative film as a secondary molded product, and FIG. 30 is a cross-sectional view of the handle taken along line XXX-XXX. In the figure, the handle as a finished product is covered with a genuine leather film 204 over substantially the entire periphery of a portion touched by a human finger, and is covered with a secondary resin 210 without exposing a needle hole on the surface of the primary molded product. Has been done.

  According to this embodiment, the pedestal and the genuine leather film as the decorative film adhered to the surface of the pedestal are employed, so that the genuine leather film is attached to almost the entire circumference without discoloring or deforming, thereby providing a sense of quality. Some surface leather handles can be automatically molded. Therefore, the manufacturing time and cost can be significantly reduced as compared with the related art that can only be manufactured by the sewing method.

The surface leather handle of the present embodiment is covered with genuine leather almost all around the finger touch, so that not only the external appearance but also the tactile sensation can be obtained. Further, in the present embodiment, since there is no generation of plating effluent or waste chemical, there is no fear of polluting the environment.
In the present embodiment, the pedestal 201 having a U-shaped cross section is urged in a direction to close the U-shaped cross section when the insert 206 is configured and set in a mold. It is preferable that the cross section is formed so as to be about 10% thicker or slightly U-shaped in section. The rivet projections 202 provided on the pedestal 201, the through-holes 203 for fixing the genuine leather film, and the like are preferably provided on a portion of the pedestal 201 as close to the peripheral end as possible. Thereby, the genuine leather film 204 attached to the surface can be effectively used.

  In this embodiment, as shown in FIG. 24 and the like, a taper is provided at the open end of the U-shaped cross section of the pedestal 201, which is inclined at an inclination of, for example, 25 to 30 ° toward the inside of the U-shape. Is preferred. As a result, it is possible to prevent the occurrence of burrs caused by the resin flowing around the surface of the genuine leather film 204.

  In this embodiment, it is preferable that the rivet through-hole provided in the outer peripheral portion of the leather film 204 is formed by, for example, punching at the same time as the cutting of the leather film 204. Thereby, the number of steps can be reduced. It is preferable that the genuine leather film 204 be cut into a large piece so as to protrude from the entire peripheral edge of the pedestal 201 by, for example, 0.5 to 3 mm. Thereby, the finish of the boundary of the film end in the molded product is improved.

  In the present embodiment, it is preferable to apply a so-called leather plowing process to reduce the thickness of the genuine leather film 204 wound around the pedestal 201 to, for example, about 例 え ば to ３. Thereby, the fixing effect of the genuine leather film 204 is increased, and peeling can be effectively prevented. In the present embodiment, no hole is particularly provided in the position corresponding to the through-hole 203 for fixing the decorative film on the pedestal 201 of the genuine leather film 204. The reason for this is that when the holes are provided, burrs are likely to be generated on the surface of the genuine leather, which causes molding defects.

In this embodiment, the surface of the genuine leather can be softly finished by inserting an elastic body such as a sponge between the pedestal 201 and the genuine leather film 204.
In the present embodiment, a predetermined number, for example, three to four, of the insert fixing needles 211 are erected in the primary cavity 7 </ b> A, and are inserted into, for example, a needle hole 208 provided at an end of the genuine leather film 204 in the insert 206. As a result, the insert 206 is fixed in the primary cavity 7A. The needle hole 208 can also be used as the through-hole 203 for fixing the leather film.

In this embodiment, the periphery of the genuine leather film 204 is pressed into a frame shape on a portion of the inner surface of the primary cavity 7A of the multi-molding mold that comes into contact with the periphery of the genuine leather. It is preferable to provide a mold step. This makes it possible to more reliably fix the insert 206, which is not easily fixed with only the insert fixing needle 211, to obtain a highly accurate double molded product.
In this embodiment, if it is not necessary to cover the needle trace for fixing the insert with the secondary resin, the handle having the decorative film may be formed only by the primary molding.

  The present invention can produce a multiple molded product by coating the surface of an injection molded resin molded product with a resin of a different material, and, if necessary, for example, a decorative film such as a genuine leather film on the molded product. Its practical value is great because it can be covered almost all around.

FIG. 2 is a cross-sectional view showing one embodiment of the present invention. FIG. 2 is a partial detailed view of FIG. 1. FIG. 2 is a plan view of the movable mold plate of FIG. 1. FIG. 2 is a plan view of the fixed mold plate of FIG. 1. Explanatory drawing which shows the function of the metal mold | die for multiple molding which is this invention. FIG. 2 is an explanatory view showing a bearing portion of the rotating disk of FIG. 1. Explanatory drawing which shows the joining part of a 1st unit core and a 2nd unit core. Explanatory drawing of a rotary gate. FIG. FIG. Explanatory drawing which shows another Example of this invention. Explanatory drawing which shows another Example of this invention. Explanatory drawing which shows another Example of this invention. FIG. FIG. FIG. 2 is an explanatory diagram of a paint spray nozzle applied to the present invention. Explanatory drawing which shows the 2nd unit core part of the magnitude | size corresponding to the primary molded article with a coating film in which the paint injection nozzle was mounted. The figure which shows the cross section of the paint injection hole of the front-end | tip part of a fuel injection nozzle. Explanatory drawing which shows the tie-bar part of the shaping | molding machine to which the dies for multiple shaping | molding of this invention is applied. Explanatory drawing which shows the double molded product. The perspective view of the pedestal applied to the present invention. FIG. Explanatory drawing of a pedestal genuine leather set (insert). FIG. 24 is a sectional view taken along line XXIV-XXIV in FIG. 23. Explanatory drawing which shows the shaping | molding method using a pedestal. Explanatory drawing of a primary molded article. The A direction view of FIG. FIG. 28 is a sectional view taken along line XXVIII-XXVIII in FIG. 27. The perspective view of a secondary molded article. FIG. 30 is a sectional view taken along line XXX-XXX in FIG. 29.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 ... Fixed side mounting plate, 2 ... Movable side mounting plate, 3 ... Fixed side type plate, 4 ... Movable side type plate, 4A ... Rotating disk, 4B ... Non-rotating part, 5A-5B ... Receiving plate, 6 ... Z pin , 7: cavity, 7A: primary cavity, 7B: secondary cavity, 8A to 8B: ejector pin, 9: ejector plate, 11: primary sprue, 12: secondary sprue, 13, 14: spring member, 15: spline shaft (Rotating shaft), 16 timing pulley, 17A, 17B semi-circular ejector plate, 18 gate, 19 sprue runner, 20 fixed shaft, 21 collar (thrust bearing), 22 rod of molding machine, 23 ... primary side protruding rod, 24 ... secondary side protruding rod, 25 ... guide pin, 26 ... guide bush, 27A ... first parting line, 27B ... second party 29, a strong coil spring for pressing; 30, a return spring; 31, a roll; 32, a cavity support bolt; 35, an ejector plate for ejecting a primary molded product; ... Second member of ejector plate for ejecting primary molded product, 38 ... Moving width adjusting bolt, 40 ... Sliding contact surface, 41 ... First unit core, 42 ... Second unit core of size corresponding to primary molded product, 43 ... Second unit core of a size corresponding to the secondary molded product, 44... Primary core, 45... Secondary core, 46... Primary recess, 47. ... Primary molded product, 51 ... Detent, 52 ... Washer, 53 ... O-ring, 54 ... Bearing receiver, 55 ... Cooling medium introduction path, 56 ... Cooling medium discharge path, 57 ... Oval communication hole, 58 ... O-ring 61 ... rotary gate, 62 ... groove, 63 ... rope, 64 ... block, 65 ... ejector pin, 66 ... shaling gate, 67 ... fixing bolt, 71 ... first unit core, 72 ... size corresponding to primary molded product A second unit core having a size corresponding to the secondary molded product, a second unit core having a size corresponding to the tertiary molded product, a primary core, a secondary core, 77 ... tertiary core, 81 ... pressurized air introduction path, 82 ... pressurized air flow path, 83 ... O-ring, 84 ... square pin, 85 ... coil spring, 86 ... coating with secondary plastic, 99 ... perforated pin, Reference Signs List 100 paint inlet hole, 101 mold, 102 sliding core, 103 hydraulic cylinder, 104 primary sprue, 105 secondary sprue, 106 mold, 107 movable plate, 108 movable mold Board, 109 ... primary Side sprue, 110: Secondary sprue. 111: Paint spray nozzle, 112: Nozzle body, 113: Sleeve, 114: Steel ball, 115: Spring member, 116: Paint flow path, 117: Burning spring link, 118: Paint groove, 119: Paint introduction through hole, 120: paint spray nozzle, 121: arrow indicating paint feed direction, 122: chamfered surface, 123: straight pipe portion of paint spray hole, 131: tie bar, 132: primary cylinder nozzle, 133: secondary cylinder nozzle, 134 ... Tie bar support, 135 ... Cooling medium inlet, 136 ... Cooling medium outlet, 137 ... O-ring, 140 ... Automotive door opening / closing handle, 141 ... Primary molded product, 142 ... Secondary coating, 201 ... Pedestal, 202 ... Riveting projection , 203: through hole, 204: genuine leather coating, 205: rivet through hole, 206: insert, 207: primary molded product, 208: Hole (needle marks), 209 ... primary resin, 210 ... secondary resin, 211 ... insert fixing needles, 212 ... protrusions of spot-like, 213 ... fitting portion between the first unit core.

Claims (30)

The fixed-side mounting plate (1) and the movable-side mounting plate (2), and the fixed-side template (3), the movable-side template (4), and the movable-side template (4) sandwiched between the mounting plates. ), A sprue passing through the fixed-side mounting plate (1) and the fixed-side template (3), and a joint between the fixed-side template (3) and the movable-side template (4). And an ejector pin extending through the movable mold plate (4) to the vicinity of the opening end of the sprue and an ejector pin extending to the cavity, and an ejector plate supporting the Z pin and the ejector pin. A primary sprue (11) for injecting a primary resin as the sprue in an injection molding die for filling and molding a resin injected from the sprue into a cavity and then projecting and recovering the molded product with the ejector pin. You A rotating disk (4A) having a circular flat surface facing the primary sprue (11) and the secondary sprue (12). And a non-rotating portion (4B) with which the rotating disk (4A) slides, the primary cavity (7A) having a size corresponding to a primary molded product, and a secondary molding larger than the primary molded product. As a secondary cavity (7B) of a size corresponding to the product, the secondary cavity (4B) is straddled along the outer periphery of the rotating disk (4A) and the sliding contact surface (40) of the non-rotating portion (4B). Means for filling a primary resin into the primary cavity (7A) to obtain a primary molded product, and moving the obtained primary molded product into the secondary cavity (7B) by rotation of the rotating disk (4A). Means and secondary cavities It and multiple mold, characterized in that a means for forming a film by secondary resin by filling a secondary resin into a gap surface of said primary molded article of a primary molded product. The movable mold plate (4) is provided along the outer periphery of the rotating disk (4A) so as to straddle the sliding contact surface (40) between the rotating disk (4A) and the non-rotating portion (4B). A plurality of cores, of which the first unit cores (41) on the rotating disk (4A) are all of the same shape and size, and a second unit core on the non-rotating part (4B); Are the size corresponding to the primary molded product (42) and the size corresponding to the secondary molded product larger than the primary molded product (43), and the first unit core (41) and the primary molded product are A primary core (44) is formed by a second unit core (42) having a size corresponding to the above, and the first unit core (41) and a second unit core (43) having a size corresponding to a secondary molded product are formed. A secondary core (45) is formed, and the front side is fixed on the fixed side template (3) in contact with the movable side template (4). A primary recess (46) and a secondary recess (47) having a size corresponding to the primary core (44) and the secondary core (45) are provided, and the primary core (44) and the primary recess (46) form a primary molded product. A secondary cavity (7B) having a size corresponding to a secondary molded product is formed by forming the primary cavity (7A) of a corresponding size by the secondary core (45) and the secondary recess (47). The mold for multiple molding according to claim 1, wherein Means for moving the primary molded product molded in the primary cavity (7A) into the secondary cavity (7B) is a joining surface (27B) between the fixed mold plate (3) and the movable mold plate (4). And a spring member for projecting, with respect to the non-rotating portion (4B), a circular plane of a rotating disk (4A) that supports one end of the primary molded product with a first unit core (41), and the rotating member. Rotating means for rotating the disk (4A) to move a primary molded product supported by the first unit core (41) onto a second unit core (43) having a size corresponding to a secondary molded product; The fixed mold plate (3) and the movable mold plate (4) are joined to accommodate the primary molded product in the secondary cavity (7B) and the circular plane of the rotating disk (4A) is fixed to the non-rotating portion. (4B) having pressing means for pushing back to the same level as the surface. Multiple mold according to claim 1 or 2, symptoms. The back surface of the rotating disk (4A) and the receiving plate (5B) supporting the movable mold plate (4) are provided with a spring member for projecting the circular surface of the rotating disk (4A) toward the non-rotating portion (4B). 4. And / or between one end of a rotating shaft (15) of the rotating disk (4 A) and a fixed shaft (20) supporting the rotating shaft (15). 5. For multiple molding. The multi-molding metal according to any one of claims 1 to 4, wherein the primary cavity (7A) and the secondary cavity (7B) are provided symmetrically with respect to a rotation axis of the rotating disk (4A). Type. Ejector plates (17A) and (17B) in the form of semi-disks which rotate together with the rotating disk (4A) corresponding to the primary cavity (7A) side and the secondary cavity (7B) side of the rotating disk (4A), respectively. And a Z-pin (6) and / or an ejector pin (8A-8D) for projecting a sprue runner, a gate, and a molded product respectively corresponding to each ejector plate, and a square adjacent to the movable-side mounting plate (2). The semi-circular ejector plate (17A) corresponding to the primary cavity (7A) and the semi-circular ejector corresponding to the secondary cavity (7B) are provided on the square ejector plate (9). The ejector rods (23, 24) acting on the plate (17B) are attached, and the ejector rods acting on the ejector plate (17B) on the secondary cavity side are attached. The length of the rod (24) is longer than the length of the protruding rod (23) acting on the ejector plate (17A) on the primary cavity side by an amount necessary for protruding the secondary molded product. 6. The mold for multiple formation according to any one of items 5 to 5. A decorative film sticking means for attaching a decorative film to the inner surface of the secondary concave portion (47) provided in the fixed side template (3) is provided, and the decorative film surface is exposed as the secondary concave portion (47). The mold for multiplex molding according to any one of claims 2 to 6, wherein the secondary resin film is formed such that a secondary resin film is formed thereon. The rotary gate (61) for cutting a gate of a primary molded product is attached to the stationary mold plate (3) or the stationary mounting plate (1). Multi-molding mold. The slit for heat insulation was provided in the boundary of the part corresponding to the said primary cavity (7A), and the part corresponding to the secondary cavity (7B) of the said fixed side mold plate (3). 8. The mold for multiple molding according to any one of 8. The multiple molding die according to any one of claims 1 to 9, wherein a plurality of heat insulating grooves are provided on a front surface or a rear surface of the fixed mold plate (3). The pressurized air flow passage (82) for deburring is provided at a predetermined interval in an outer peripheral portion of the secondary concave portion (47) of the fixed mold plate (3). The mold for multiple molding according to the above item. A rotary shaft (15) fixed to the rotary disk (4A) and a fixed shaft (20) supporting the rotary shaft (15) are provided with a cooling medium or heating medium introduction path (55) and a discharge path (56), respectively. The introduction path and the discharge path are communicated with each other, and the heating medium is supplied to the vicinity of the primary cavity (7A) and the secondary cavity (7B) of the rotating disk (4A) through the introduction path (55), and then the discharge is performed. The mold for multiplex molding according to any one of claims 2 to 11, wherein a heat medium flow path for discharging the heat medium to the outside of the system via a path (56) is provided. A square pin is provided to reach a portion of the inner surface of the first unit core (41) corresponding to the ridge between the side surface and the back surface of the primary molded product, and the square pin is protruded on the primary molding side to form a secondary molding side. The multi-molding die according to any one of claims 2 to 12, further comprising a moving unit for pushing down to an inner surface level of the first unit core. The rotating disk (4A) is defined as a primary cavity having a size corresponding to a primary molded product, a secondary cavity having a size corresponding to a secondary molded product, and a tertiary cavity having a size corresponding to a tertiary molded product. ) Are provided at intervals of 120 ° along the outer circumference of the rotary disk (4A) and the non-rotating portion (4B) so as to straddle the sliding contact surface (40) or an integral multiple thereof, and are primarily formed in the primary cavity. Means for forming a through hole for introducing a paint on the surface of the primary molded article, and supplying a paint for forming a coating film to the surface of the primary molded article through the through hole in the secondary cavity. And a coating forming means for coating a surface other than the coating film of the primary molded article provided with the coating film in the tertiary cavity with a secondary resin is provided. For multiple molding described in Type. A paint spray nozzle for supplying a paint for forming a coating film on the surface of the primary molded article according to claim 14, wherein the nozzle body has a paint spray hole, a sleeve connected to the nozzle body, the sleeve and the sleeve. A steel ball disposed at a connection portion of the nozzle body, a spring member for abutting the steel ball against an opening end of the sleeve to urge the paint flow path to be closed, and overcoming a pressing force of the spring member. A paint spray nozzle comprising: a cylinder pump for spraying paint from a paint spray hole through a paint flow passage of the sleeve and the nozzle body; and cooling means for cooling a connection portion between the nozzle body and the sleeve. The steel ball is provided slidably in contact with the inner wall surface of the paint flow path of the nozzle body so as to be movable in the axial direction, and a paint groove is provided along the axial direction on the paint flow path inner wall surface of the nozzle body. The paint spray nozzle according to claim 15, wherein the spray nozzle is provided. The cooling means includes a shrink fit ring covering a connecting portion between the nozzle body and the sleeve, and a cooling medium circulating means for supplying a cooling medium to a space between the shrink fit ring and the nozzle body. The paint spray nozzle according to claim 15 or 16, wherein the paint spray nozzle is provided. The multiple molding die according to any one of claims 1 to 14, wherein a primary cylinder nozzle for injecting the primary resin and a secondary cylinder nozzle for injecting the secondary resin are provided at predetermined intervals in the vertical direction. A multi-molding device mounted on an injection molding machine. An injection molding machine for performing multiple injection molding by mounting the mold for multiple molding according to any one of claims 1 to 14, wherein a primary side cylinder nozzle for injecting a primary resin and a secondary side for injecting a secondary resin. A multi-molding machine wherein side cylinder nozzles are provided at predetermined intervals in the vertical direction. 2. A multiple injection molding method using the multiple molding die according to claim 1, wherein the primary resin injected from the primary sprue (11) is filled into the primary cavity (7A) to perform primary molding, and then the movable mold is used. By rotating the rotating disk (4A) of the plate (4) to move the primary molded product into the secondary cavity (7B), the gap between the primary molded product and the secondary cavity (7B) is filled with the secondary resin. A multiple injection molding method, wherein a film made of a secondary resin is formed on the surface of the primary molded product. 14. A multiple injection molding method using the multiple molding die according to any one of claims 2 to 13, wherein the primary resin injected from the primary sprue (11) is filled into the primary cavity (7A) to perform primary molding. Thereafter, the joining surface between the fixed mold plate (3) and the movable mold plate (4) is opened, the gate of the primary molded product is cut off, and the circular surface of the rotating disk (4A) of the movable mold plate (4) is set to non-contact. The primary molded product is protruded from the rotating part (4B) by a predetermined height, detached from the second unit core (42) and supported only by the first unit core (41), and the rotating disk (4A) is held in a predetermined position. By rotating the primary molded product by an angle, the primary molded product is moved to the position of the second unit core (43) having a size corresponding to the secondary molded product formed on the non-rotating part (4B) of the movable mold plate (4). After that, the joining surface between the fixed mold plate (3) and the movable mold plate (4) is closed and After retracting the circular flat surface of the rotating disk (4A) to accommodate the primary molded product in the secondary cavity (7B), the secondary sprue (12) is inserted into the gap between the primary molded product and the secondary cavity (7B). A multiple injection molding method characterized by filling a secondary resin to be injected and forming a film of the secondary resin on the surface of the primary molded product. 22. The multiplexing method according to claim 20, wherein after a decorative film is attached to the surface of the primary molded product, a coating of a secondary resin is formed on an outer peripheral portion of the decorative film and a surface of the primary molded product. Injection molding method. A primary pin made of a primary resin in a state in which a square pin that reaches an inner surface of the first unit core to a position corresponding to a ridge between the side surface and the back surface of the primary molded product projects a predetermined length from the inner surface of the first unit core. The multiplex method according to any one of claims 20 to 22, wherein molding is performed, and a film layer made of a secondary resin is formed to extend to a notch portion of the primary molded product formed by the square pin during secondary molding. Injection molding method. A multiple injection molding method using the multiple molding die according to any one of claims 2 to 13, wherein a pedestal (201) having a shape similar to a finished product is formed in advance, and a surface of the pedestal (201) is formed. Is covered with a decorative film (204) to form an insert (206), and the insert (206) is fixed in the primary cavity (7A) of the multi-molding mold, and is inserted through a primary sprue (11). After the primary resin is introduced into the primary cavity (7A) to perform primary molding so as to cover a part other than the decorative film of the insert, a joining surface between the fixed mold plate (3) and the movable mold plate (4) is formed. Is opened, the gate of the primary molded product is cut off, and the circular surface of the rotating disk (4A) of the movable mold plate (4) is protruded by a predetermined height with respect to the non-rotating part (4B) to separate the primary molded product into the primary molded product. The second unit core (42) having a size corresponding to a molded product The primary molding is formed on the non-rotating part (4B) of the movable mold plate (4) by rotating the rotating disk (4A) by a predetermined angle by supporting the first molding unit only by the first unit core (41). After moving to the position of the second unit core (43) having a size corresponding to the formed secondary molded product, the joining surface between the fixed-side mold plate (3) and the movable-side mold plate (4) is closed and After the circular plane of the rotating disk (4A) is retracted and the primary molded product is accommodated in the secondary cavity (7B), the gap between the primary molded product and the secondary cavity (7B) is filled with the secondary resin. A multiple injection molding method comprising forming a secondary molded product having a decorative film by covering a part other than the decorative film of the primary molded product. 25. The multiple injection molding method according to claim 20, wherein a rotary gate (61) is used as a gate cutting device for the primary molded product. The pressurized air for deburring is introduced into an outer peripheral portion of a secondary recess of the fixed mold plate (3) when forming the coating of the secondary resin. 2. The multiple injection molding method according to item 1. A cooling or heating medium introduction path (55) and discharge provided in communication with a rotating shaft (15) fixed to the rotating disk (4A) and a fixed shaft (20) supporting the rotating shaft (15), respectively. 27. The method according to claim 20, wherein the heat medium is circulated through the passage (56) to adjust the temperature in the vicinity of the first cavity (7A) and the second cavity (7B) of the rotating disk (4A). The multiple injection molding method according to any one of the above. 15. A multiple injection molding method using a multiple molding die according to claim 14, wherein a primary resin is filled into a primary cavity provided with the piercing pin (99) through the primary sprue (11). Forming a primary molded product having a paint introduction hole penetrating through the front and back, moving the obtained primary molded product into the secondary cavity, using a paint injection nozzle, and coating the paint through the paint introduction hole of the primary molded product. To form a coating film on the surface of the primary molded product, move the obtained primary molded product with a coating film into the tertiary cavity, and introduce it through the secondary sprue (12) in the tertiary cavity. A secondary resin film for covering a surface other than the coated film surface of the primary molded article with a coated film using the secondary resin to be formed. 29. The multiple injection molding method according to claim 28, wherein the paint spray nozzle is the paint spray nozzle according to any one of claims 15 to 17. The multiple injection molding method according to any one of claims 20 to 29, wherein the multiple molding die is mounted on the multiple molding machine according to claim 19.

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