WO2019049416A1

WO2019049416A1 - Insert-molding mold

Info

Publication number: WO2019049416A1
Application number: PCT/JP2018/015944
Authority: WO
Inventors: 和正飯島; 信雄北吉
Original assignee: オリンパス株式会社
Priority date: 2017-09-07
Filing date: 2018-04-18
Publication date: 2019-03-14
Also published as: JP2019048385A

Abstract

An insert-molding mold (40) is equipped with a pressing insert (101) including an elastic member. The elastic member has a pressing surface (101a) that presses a portion of an insert component (20) when the mold (40) is closed. The pressing surface (101a) has substantially the same shape and substantially the same size as said portion of the insert component (20).

Description

Mold for insert molding

The present invention relates to a mold for insert molding.

Generally, in a mold for insert molding using Liquid Injection Molding (hereinafter referred to as LIM), the mold molds the insert-molded part by integrating the molded part and the insert part. For molding of the insert molded part, the mold is closed after the insert part has been placed in the open mold. The material for molding the molding portion is, for example, a resin (hereinafter referred to as a molding portion resin). In the mold, the molding resin is supplied to the peripheral portion of the insert part in a thermally melted state. Molded part resin is thermosetting. When the molding resin is cured by heating from the mold, the molding is molded. Simultaneously with this molding, the molding part is integrated into the insert part and the integration forms an insert molded part.

For example, the mold stabilizes the position of the insert part placed in the mold between the closing of the mold for supply of molding part resin and the opening of the mold for taking out the insert molded part To hold the insert part.

For example, in a molding die apparatus disclosed in Japanese Patent Application Laid-Open No. 9-109188, an insert component is held by the biasing force of a holding pin disposed in the molding die unit.

In the molding die apparatus disclosed in JP-A-9-109188, when the flat portion of the rod-shaped pressing pin presses the curved surface portion of the insert part, there is a possibility that the pressing force may be applied to a part of the curved surface portion. In particular, local forces may be applied to the curved surface of the insert part. Then, in the molding process, the shape of the insert part is deformed by a local force, and the deformation changes the appearance of the insert part. The deformation of the shape and the change of appearance lead to the deterioration of the quality of the insert-formed part including the insert part, and the insert-formed part is judged as a defective product by the deformation and the change. For this reason, it is required that deformation and change be suppressed.

The present invention has been made in view of these circumstances, and it is an object of the present invention to provide a mold for insert molding which can suppress the deformation of the shape of the insert molded part and the change of the appearance in the insert molding.

In order to achieve the above object, one aspect of the mold for insert molding of the present invention is characterized in that, with the heat-softenable insert part being disposed inside the mold, the insert part and the insert part are provided. A mold for insert molding integrally forming a supplied resin, wherein a part of the insert part is pressed when the mold is closed, and the shape and the same as the part of the insert part are substantially the same. A pressing insert including an elastic member having a pressing surface of a size is provided.

The present invention can provide a mold for insert molding which can suppress the deformation of the shape of the insert molded part and the change of the appearance in the insert molding.

FIG. 1A is a perspective view of an insert molded part according to an embodiment of the present invention. FIG. 1B is a perspective view of the insert molded part shown in FIG. 1A viewed from the opening side of the insert molded part. FIG. 2A is a perspective view of a mold for insert molding according to an embodiment of the present invention for molding the insert molded part shown in FIG. 1A. FIG. 2B is a longitudinal cross-sectional perspective view of the mold shown in FIG. 2A with the mold open and the insert part of the insert-molded part disposed in the mold. FIG. 2C is a longitudinal sectional view of the mold shown in FIG. 2B. FIG. 2D is a view showing a state in which the mold shown in FIG. 2C is closed. FIG. 2E is an enlarged view of the periphery of the insert part shown in FIG. 2D. FIG. 2F is an enlarged view of the periphery of the convex portion of the insert part shown in FIG. 2E. FIG. 3A is a perspective view of a presser insert of a mold. FIG. 3B is a perspective view of the insert part and a presser insert facing the insert part when the mold is opened. FIG. 3C is a perspective view of the insert part when the mold is closed and a pressing insert for pressing the insert part. FIG. 4A is a perspective view showing a first modified example of a pressing insert. FIG. 4B is an enlarged view of a convex portion of the presser insert shown in FIG. 4A. FIG. 5A is a perspective view showing a second modified example of the pressing insert. FIG. 5B is an enlarged view of a convex portion of the pressing insert shown in FIG. 5A. FIG. 6 is a perspective view showing a third modification of the pressing insert. FIG. 7 is a perspective view showing a fourth modification of the pressing insert.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, in some drawings, illustration of a part of member is abbreviate | omitted for clarification of illustration.

The insert molded part 10 of the present embodiment shown in FIGS. 1A and 1B is used, for example, as an exterior part of the operation part of the endoscope although not shown.

The insert molded part 10 has an insert part 20 molded by a not-shown mold and a frame-shaped molded portion 30 integrally molded with the insert part 20 by a mold 40 for insert molding (see FIG. 2A). The insert molded part 10 is formed by integration of the insert part 20 and the molded part 30.

The insert part 20 is formed, for example, as a cup-shaped housing having a bottom surface. The axis C of the insert part 20 indicates a straight line passing through the center of gravity in a plane perpendicular to the opening and closing direction of the mold 40 described later.

The bottom which is a part of the insert part 20 has a curved surface 21. For example, the curved surface portion 21 is disposed over the entire outer peripheral surface of the bottom portion. The curved surface portion 21 is back-to-back with the inner circumferential surface of the bottom portion. For example, the inner circumferential surface of the bottom portion may be a curved surface as in the curved surface portion 21. The bottom portion including the curved surface portion 21 protrudes in the direction opposite to the opening 23 of the insert component 20 in the direction of the axis C of the insert component 20. The curved surface portion 21 is a part of the outer peripheral surface of the insert part 20. The curved surface portion 21 is exposed to the outside, for example, when the insert molded part 10 is mounted on a member not shown as one part. The curved surface portion 21 is a portion exposed to the eyes and functions as an appearance portion (exterior surface).

As shown in FIG. 1A, FIG. 1B and FIG. 2F, the insert part 20 has an annular protrusion 25. The convex portion 25 is disposed over the entire circumference of the outer peripheral surface of the side surface portion 25 a of the insert component 20. The protrusion 25 is disposed around the edge of the opening 23. The protrusion 25 may be integral with or separate from the outer peripheral surface of the side surface 25a. The outer peripheral surface and the inner peripheral surface of the side surface portion 25a are, for example, flat surfaces.

The formed portion 30 is a frame-shaped component disposed around the outer periphery of the edge of the opening 23. The molding portion 30 is disposed on the side surface of the convex portion 25 and the outer peripheral surface of the side surface portion 25 a. The molding portion 30 protrudes outward beyond the convex portion 25 in the orthogonal direction orthogonal to the axis C.

The insert part 20 is a part having heat softening property. The material of the insert part 20 is, for example, a resin having heat softening properties. Such a resin has, for example, modified polyphenylene oxide (hereinafter referred to as PPO). For convenience of explanation, a resin for molding the insert part 20 is referred to as an insert part resin.

The material of the molding unit 30 is, for example, a resin and has high fluidity. The resin is, for example, a high temperature resin such as super engineering plastic, or a thermosetting silicone resin. For convenience of description, a resin for molding the molding portion 30 is referred to as a molding portion resin.

Next, the mold 40 for insert molding will be described. The mold 40 insert-molds the insert-molded part 10.

First, the insert part 20 is molded by a mold not shown. The molded insert part 20 is a part that has already been completed, and is in a state of satisfying the desired quality. Next, as shown in FIGS. 2B and 2C, the insert part 20 is placed inside the open mold 40. In particular, as shown in FIGS. 2B and 2C, the insert part 20 is arranged and held in the movable mold 50 of the mold 40 which is open relative to the fixed mold 80 of the mold 40. At this time, the curved surface portion 21 faces the fixed mold 80 and is disposed on the side where the fixed mold 80 is closed. In addition, the curved surface portion 21 protrudes from the movable mold 50 toward the fixed mold 80. After being held, the stationary mold 80 is closed relative to the movable mold 50 as shown in FIG. 2D. Thereby, the insert part 20 will be arrange | positioned inside the metal mold | die 40. As shown in FIG. Being disposed inside the mold 40 means being confined inside the mold 40.

With the mold 40 closed, the mold 40 supplies the molding resin to the periphery of the insert part 20 by insert molding using Liquid Injection Molding (hereinafter referred to as LIM), and the insert molded part 10 is obtained. Form. Specifically, in a state where the insert part 20 is disposed inside the closed mold 40, the mold resin is supplied from the cavity 91 of the mold 40 to the peripheral part of the insert part 20, whereby the mold 40 is obtained. , Integrally form the insert part 20 and the molding resin with respect to each other to form the insert molded part 10. The mold 40 has an inclusion portion 103 described later disposed around the insert part 20, and the inclusion portion 103 includes a cavity 91.

As shown in FIGS. 2A, 2B, 2C and 2D, the mold 40 is a movable mold 50 in which the insert part 20 is disposed and a parting line (hereinafter referred to as PL) with respect to the movable mold 50. And a fixed die 80 disposed opposite to each other. The movable mold 50 holds the insert part 20 disposed on the movable mold 50.

The movable mold 50 is attached to a first platen portion (not shown) of an injection molding machine (not shown), and the fixed mold 80 is attached to a second platen portion (not shown) of the injection molding machine (not shown). The fixed mold 80 is moved in the opening and closing direction by the second platen unit, and this movement closes (closes) or opens (separates) the movable mold 50. That is, the fixed mold 80 is separable from the movable mold 50. The opening and closing direction indicates the vertical direction of the paper surface in FIGS. 2C and 2D. The axis C direction of the mold 40 is the axis C direction of the fixed mold 80, the axis C direction of the movable mold 50, the opening / closing direction, and the axis C direction of each of the insert part 20, the molding portion 30 and the insert molding part 10. And match. Such an axis C direction indicates a direction along a straight line passing through the centroid in a plane perpendicular to the opening and closing direction of the mold 40.

The mold 40 has a guide pin 151 and a support pin 153 arranged along the opening and closing direction. The guide pin 151 extends from the movable plate 51 of the movable mold 50 described later toward the fixed mold 80 in the opening and closing direction. The support pin 153 is disposed outside the guide pin 151 in the orthogonal direction orthogonal to the opening and closing direction. The support pin 153 is disposed inside a runner plate 85 and a fixed plate 87, which will be described later, of the fixed mold 80, and extends toward the movable plate 51 in the opening and closing direction. The guide pin 151 guides the opening and closing movement of the fixed mold 80 with respect to the movable mold 50, and the support pin 153 supports the opening and closing movement of the fixed mold 80. The guide pin 151 is inserted into and removed from a hole (not shown) disposed on a fixing plate 87 described later of the fixed mold 80 as the fixed mold 80 is opened and closed. Specifically, when the fixed mold 80 is opened, the guide pin 151 is withdrawn from the hole, and when the fixed mold 80 is closed, the guide pin 151 is inserted into the hole. The support pin 153 is inserted into the hole 51a (see FIG. 2B) disposed in the movable plate 51 regardless of whether the fixed mold 80 is open or closed.

As shown in FIGS. 2B, 2C and 2D, the movable die 50 has a movable plate 51 facing the fixed plate 87 in the opening and closing direction, a first movable insert 53 disposed on the movable plate 51, and a first And a second movable insert 55 disposed in the movable insert 53.

The movable plate 51 has a recess 51 c which is a groove in which the first movable insert 53 is disposed. The recess 51 c is recessed in the opening and closing direction.

The first movable insert 53 has a convex portion 53a disposed at a central portion of the first movable insert 53 and a concave portion 53b which is a groove disposed around the convex portion 53a. The convex portion 53a protrudes toward the fixed mold 80 with respect to the PL in the opening and closing direction. The upper surface of the convex portion 53a is disposed on the side where the opening and closing direction is open with respect to PL, and is a flat surface. The recess 53 b is disposed around the protrusion 53 a around the protrusion 53 a. The recess 53 b is recessed with respect to PL in the opening and closing direction. The bottom surface of the recess 53 b is disposed closer to the closing side than the PL, and is a flat surface. The upper surface of the first movable insert 53 excluding the convex portion 53a and the concave portion 53b is disposed on PL and is a flat surface. In a state where the mold 40 is open, the insert part 20 is disposed in the first movable insert 53.

The second movable insert 55 is fitted into the recess 53b. The upper surface of the second movable insert 55 is disposed on PL and is a plane. As shown in FIG. 2F, the second movable insert 55 has a cavity 55a to which the molding portion resin is supplied in order to mold the molding portion 30. The cavity 55 a is disposed on the inner circumferential surface of the second movable insert 55.

The convex portion 53 a holds the insert component 20 in a state in which the second movable insert 55 is fitted into the concave portion 53 b. Specifically, the insert part 20 is fitted to the convex part 53 a through the opening 23 of the insert part 20 so that the convex part 53 a is disposed inside the insert part 20. At this time, the inner peripheral surface of the side surface portion 25a of the insert part 20 abuts on the outer peripheral surface of the convex portion 53a, and the convex portion 25 is disposed around the cavity 55a. The upper surface of the convex portion 53a is separated from the inner circumferential surface of the bottom portion of the insert part 20, a hollow portion is formed between the upper surface and the inner circumferential surface, and the curved surface portion 21 is exposed. In addition, the cavity 55a is disposed around the protrusion 53a. If the movable mold 50 holds a portion other than the outer peripheral surface (the outer peripheral surface of the side surface portion 25a and the curved surface portion 21) of the insert component 20 exposed to the outside and the inner peripheral surface of the side surface portion 25a of the insert component 20, Good.

As shown in FIG. 2A, FIG. 2B, FIG. 2C and FIG. 2D, the movable die 50 has a heat insulating plate 57 in which the movable plate 51 is disposed, a core receiving plate 59 in which the heat insulating plate 57 is disposed, And a core mounting plate 61 supported by the one platen portion. The movable mold 50 moves in the direction of the axis C of the movable mold 50 by moving toward the fixed mold 80 and the two spacer plates 63 interposed between the core receiving plate 59 and the core attachment plate 61. And an extruding mechanism 65 for extruding the insert molded part 10 therefrom.

The heat insulating plate 57 is fixed to the movable plate 51 and the core support plate 59 by, for example, a bolt (not shown). The heat insulating plate 57 suppresses, for example, the transfer of heat generated from the heating mechanism 201 described later from the movable plate 51 to the core receiving plate 59 side.

The core receiving plate 59 is fixed to the spacer plate 63 by, for example, a bolt (not shown).

The spacer plate 63 is fixed to the core mounting plate 61 by, for example, a bolt (not shown). As shown to FIG. 2A, spacer board 63 comrades are mutually arrange | positioned in parallel. The spacer plate 63 defines the protrusion amount of the protrusion mechanism 65 by the thickness of the spacer plate 63.

The ejection mechanism 65 is disposed in the space between the two spacer plates 63 and between the core receiving plate 59 and the core mounting plate 61. The ejection mechanism 65 includes an ejection unit (not shown), a plate unit 67 for projecting the ejection unit toward the insert part 20, and a biasing member 69 for urging the plate unit 67 toward the core mounting plate 61. When the insert part 20 is fitted into the projection 53 a, the protrusion of the protrusion unit is arranged at a position away from the inner circumferential surface of the bottom of the insert part 20 in the direction of the axis C of the mold 40.

The plate unit 67 has a first plate portion 67a mountable on the core mounting plate 61, and a second plate portion 67b mounted on the surface of the first plate portion 67a. The second plate portion 67 b is fixed to the first plate portion 67 a by a bolt or the like (not shown).

The biasing member 69 is disposed between the core receiving plate 59 and the second plate portion 67 b. The biasing member 69 biases the second plate portion 67 b toward the core mounting plate 61. The biasing member 69 has, for example, a spring.

The first plate portion 67a has an ejector rod 67c disposed on the back surface of the first plate portion 67a. The ejector rod 67c may be integral with or separate from the first plate portion 67a. The ejector rod 67 c is inserted into the through hole 61 a of the core attachment plate 61. The ejector rod 67c contacts an ejector (not shown) of the injection molding machine. When the ejector member moves from the movable die 50 toward the stationary die 80 along the axis C of the movable die 50, the ejector member contacts the ejector rod 67c. When the ejector member presses the ejector rod 67c toward the stationary die 80 by the force more than the biasing force of the biasing member 69, the ejector rod 67c presses the movable die 50 from the movable die 50 along the axis C direction of the movable die 50. Are pushed towards. That is, the ejector rod 67c receives the protrusion of the protrusion member. As a result, the first plate portion 67 a placed on the core mounting plate 61 is separated from the core mounting plate 61 in the direction of the axis C of the movable mold 50. The first plate portion 67a and the second plate portion 67b placed on the first plate portion 67a move from the movable mold 50 toward the fixed mold 80 along the axis C of the movable mold 50. By this movement, the protrusion of the protrusion unit (not shown) attached to the second plate portion 67b moves toward the inner peripheral surface of the bottom of the insert part 20, abuts on the inner peripheral surface, and insert molding is performed Project the part 10 from the movable mold 50 towards the stationary mold 80. When opening from the moveable mold 50 to the fixed mold 80, a movement (expulsion) is carried out, for example, for removal of the insert-moulded part 10 from the mold 40. When the protrusion member returns to the original position, the protrusion is eliminated, and the second plate portion 67b is biased by the biasing member 69, and the first plate portion 67a and the second plate portion 67b are in the direction of the axis C of the movable mold 50. Move from the stationary mold 80 toward the movable mold 50 along the Then, the first plate portion 67 a is placed again on the core attachment plate 61.

As shown in FIGS. 2B, 2C and 2D, the fixed mold 80 includes a mold mounting plate 81, a heat insulating plate 83 on which the mold mounting plate 81 is disposed, and a runner plate 85 on which the heat insulating plate 83 is disposed. Have. The fixed die 80 further has a fixed plate 87 disposed on the runner plate 85, a fixed insert 89 disposed in the recess 87a of the fixed plate 87, and a cavity 91 which is a flow passage portion through which the molding resin flows. .

The mold mounting plate 81 is supported by a second platen unit (not shown).

The heat insulating plate 83 is fixed to the mold attachment plate 81 by, for example, a bolt (not shown). The heat insulating plate 83 suppresses, for example, the heat generated from the heating mechanism 201 from being transmitted from the runner plate 85 to the mold attachment plate 81.

The runner plate 85 is fixed to the heat insulating plate 83 by, for example, a bolt (not shown). The runner plate 85 has a hole 85a and a sprue bush 85b fitted in the hole 85a.

The fixing plate 87 is fixed to the runner plate 85 by, for example, a bolt (not shown). The fixed plate 87 has one end surface (plane) opposite to the upper surface (plane) of the movable plate 51. When the fixed mold 80 is closed with respect to the movable mold 50, one end surface of the fixed plate 87 abuts on the upper surface of the movable plate 51. The recess 87 a is recessed from the one end surface toward the mold mounting plate 81 in the opening and closing direction. The recess 87a faces the recess 51c in the opening and closing direction. For example, the inner shape and the inner method of the recess 87a are substantially the same as the inner shape and the inner method of the recess 51c. The inner shape shows the inner shape, and the inner method shows the inner shape size.

The fixed insert 89 has one end face which is a plane. When the fixed mold 80 is closed with respect to the movable mold 50, one end surface of the fixed insert 89 is the upper surface of the first movable insert 53 excluding the convex portion 53a and the concave portion 53b and the second movable insert 55. Contact with the upper surface.

As shown in FIGS. 2E and 2F, when the stationary mold 80 is closed to the movable mold 50, the cavity 91 communicates with the cavity 55a. The cavity 91 is a path for supplying the molding portion resin to the cavity 55a.

The cavity 91 is disposed inside the sprue bush 85 b, the fixing plate 87, and the fixing insert 89. Therefore, the runner plate 85 having the sprue bush 85 b and the sprue bush 85 b, the fixing plate 87 and the fixing insert 89 function as the containing portion 103 including the cavity 91. The inclusion portion 103 may include a second movable insert 55 that includes the cavity 55a.

The heat insulating plate 83 and the containing portion 103 (the runner plate 85, the fixing plate 87, and the fixing insert 89) are cylindrical, and each have

hollow portions

95a, 95b, 95c, 95d. The cavity 91 is separate from the

hollow portions

95a, 95b, 95c, and 95d, and does not communicate with the

hollow portions

95a, 95b, 95c, and 95d, and the lateral sides of the

hollow portions

95a, 95b, 95c, and 95d. Will be placed in The

hollow portions

95a, 95b, 95c, 95d are coaxially arranged with respect to each other in the opening / closing direction, arranged in this order, and in communication with the adjacent hollow portions. The inner shape and inner method of each of the heat insulating plate 83, the runner plate 85, the fixed plate 87, and the fixed insert 89 correspond to the outer shape and outer method of each of the

hollow portions

95a, 95b, 95c, 95d. The outer shape shows the outer shape, and the outer method shows the outer dimension. For example, the inner shape and the inner method of each of the heat insulating plate 83, the runner plate 85, the fixed plate 87, and the fixed insert 89 may be substantially identical to each other. Therefore, in the

hollow portions

95a, 95b, 95c, 95d, their external shapes and external methods may be substantially identical to one another. Each external shape and external method may be adjusted suitably. The outer shape and the outer method of each may be different from each other.

The fixed die 80 further includes a presser insert fixing plate 99 disposed on the die mounting plate 81 and a press insert 101 disposed on the presser insert fixing plate 99. The pressing insert fixing plate 99 and the pressing insert 101 are, for example, column-shaped members. The pressing insert fixing plate 99 is fixed to the mold mounting plate 81 by, for example, a bolt (not shown). The pressing insert 101 is fixed to a pressing insert fixing plate 99 by, for example, a bolt (not shown). The pressing insert fixing plate 99 may be omitted, and the pressing insert 101 may be directly fixed to the mold mounting plate 81.

The pressing insert fixing plate 99 and the pressing insert 101 may be disposed apart from the heat insulating plate 83 and the containing portion 103 (the runner plate 85, the fixing plate 87, and the fixing insert 89). For example, the pressing insert fixing plate 99 is disposed in the

hollow portions

95a, 95b and 95c which are the inside of the heat insulating plate 83 and the containing portion 103 (the runner plate 85 and the fixing plate 87). It arrange | positions in the hollow part 95d which is an inside of fixed core 89). The presser insert 101 may be at least disposed in the hollow portion 95d, and the arrangement position of the presser insert fixing plate 99 and the press insert 101 with respect to the

hollow portions

95a, 95b, 95c, 95d is not particularly limited.

The outer shape and outer method of the pressing insert fixing plate 99 and the outer shape and outer method of the pressing insert 101 are the heat insulating plate 83 and the containing portion 103 (the runner plate 85 and the fixing plate 87 in the

hollow portions

95a, 95b, 95c, and 95d). It is smaller than each inner shape and inner method with the fixed insert 89). Therefore, when the presser insert fixing plate 99 is disposed in the

hollow portions

95a, 95b, 95c, the outer peripheral surface of the presser insert fixing plate 99 corresponds to the heat insulating plate 83 and the containing portion 103 (runner plate 85 and fix plate 87). It is arranged away from the inner circumferential surface. Then,

gaps

97a, 97b, 97c are arranged between the pressing insert fixing plate 99, the heat insulating plate 83, the runner plate 85 and the fixing plate 87. When the pressing insert 101 is disposed in the hollow portion 95 d, the outer circumferential surface of the pressing insert 101 is disposed away from the inner circumferential surface of the fixed insert 89 serving as the inclusion portion 103. Then, a gap 97 d is disposed between the pressing insert 101 and the fixed insert 89.

The

gaps

97a, 97b, 97c, 97d are annular, coaxially disposed in the opening / closing direction, and disposed in this order to communicate with the adjacent gaps. When the mold 40 is opened, the

gaps

97a, 97b, 97c, 97d communicate with the outside.

As shown in FIGS. 2D, 2E and 2F, the inner shape and the inner size of the fixed insert 89 are larger than the outer shape and the outer size of the insert part 20. When the mold 40 is closed, the insert part 20 disposed in the mold 40 is disposed in the hollow portion 95 d which is the inside of the fixed insert 89 which is the inclusion portion 103. Then, the inner circumferential surface of the fixed insert 89 which is the inclusion portion 103 is disposed apart from the outer circumferential surface of the side surface portion 25 a of the insert part 20. A gap 97 d is disposed between the inner peripheral surface of the fixed insert 89 and the outer peripheral surface of the side surface 25 a of the insert part 20.

The outer shape and the outer method of the pressing insert fixing plate 99 are substantially the same as the outer shape and the outer method of the pressing insert 101. The outer shape and outer method of the pressing insert fixing plate 99 and the outer shape and outer method of the pressing insert 101 are slightly smaller than the outer shape and outer method of the curved portion 21, but substantially the same as the outer shape of the curved portion 21 and outer method May be.

The pressing insert fixing plate 99 is, for example, metal.

The pressing insert 101 has, for example, an elastic member. The elastic member has a hardness lower than that of the insert part 20, for example. Such an elastic member has, for example, a resin material. The resin material preferably contains, for example, at least one of PTFE, FEP, PFA, ETFE, ECTFE, PVF, and PES. The compression modulus of PTFE is, for example, about 500 Mpa or more. The Rockwell hardness of PTFE is, for example, about 20 on the R scale. The presser insert 101 should have heat resistance and be soft. Further, although a rubber material can also be used as the elastic member, in this case, it is not easy to cut out the pressing surface 101a described later. In the present embodiment, it is preferable to use a resin material rather than a rubber material in this embodiment in consideration of the scraping and the deterioration of the rubber material due to heat.

As shown in FIG. 2D, when the fixed mold 80 is closed to the movable mold 50, the mold mounting plate 81 pushes the pressing insert 101 toward the movable mold 50 via the pressing insert fixing plate 99. Thereby, the pressing insert 101 presses the curved surface portion 21 of the insert component 20 disposed in the hollow portion 95 d. The pressing direction indicates the closing direction of the fixed mold 80. The presser insert 101 separates from the insert part 20 when the fixed die 80 opens to the movable die 50.

The pressing insert 101 (elastic member) has a pressing surface 101a. As shown in FIG. 3A, the pressing surface 101a is, for example, a smooth curved surface. The pressing surface 101 a is recessed from the movable mold 50 toward the fixed mold 80 and faces the curved surface portion 21. The pressing surface 101a is formed by cutting the pressing insert 101 (elastic member), for example, and has elasticity.

As shown in FIG. 2D, FIG. 2E, FIG. 2F, FIG. 3A, FIG. 3B and FIG. 3C, the pressing surface 101a has substantially the same shape and size as the curved surface portion 21 which is a part of the insert part 20. In detail, the pressing surface 101 a has substantially the same shape and the same size as the curved surface portion 21 of the insert part 20. The pressing surface 101 a is a curved surface, and has a curvature substantially the same as the curvature of the curved surface portion 21. When the pressing surface 101 a presses the curved surface portion 21, the pressing surface 101 a is disposed along the outer peripheral shape of the curved surface portion 21. The outer shape and outer method of the pressing surface 101 a are slightly smaller than the outer shape and outer method of the curved surface portion 21, but may be substantially the same as the outer shape and outer method of the curved portion 21.

When the fixed mold 80 of the mold 40 is closed to the movable mold 50, the pressing surface 101 a presses the curved surface portion 21 which is a part of the insert part 20. When the pressing surface 101 a presses the curved surface portion 21, the pressing insert 101 contacts the curved surface portion 21 with one surface of the pressing surface 101 a. In detail, the pressing surface 101 a is in surface contact with the curved surface portion 21. The entire pressing surface 101a is opposed to the curved portion 21 with a curvature substantially the same as the curvature of the curved portion 21, and is in surface contact with an opposing portion which is substantially the entire curved portion 21, and substantially the entire curved portion 21 is substantially uniform. Hold down with the power of That is, the pressing surface 101 a applies the pressing force substantially uniformly to substantially the entire curved surface 21, and the pressing force of the pressing surface 101 a is dispersed over substantially the entire curved surface 21, and substantially substantially the entire curved surface 21. It is added uniformly. The pressing surface 101 a presses the insert component 20 toward the movable mold 50 in the direction in which the fixed mold 80 closes with respect to the movable mold 50. When the fixed mold 80 opens from the movable mold 50, the pressing surface 101a is separated from the curved surface portion 21, and the pressing force is eliminated.

The mold 40 cools the insert part 20 and a heating mechanism 201 such as a heater that heats the molding part resin in order to cure the molten molding part resin supplied from the cavity 91 to the peripheral part of the insert part 20. And a cooling mechanism 203 for cooling the pressing insert 101.

The heating mechanism 201 heats the containing portion 103 including the cavity 91. For example, the heating mechanism 201 directly transfers the heat to the runner plate 85 and the fixing plate 87, indirectly transfers the heat to the sprue bush 85b via the runner plate 85, and fixes the fixing insert 89 via the fixing plate 87. Indirectly transfer heat to The heating mechanism 201 heats the molding portion resin flowing to the cavity 91 via the inclusion portion 103. The heating mechanism 201 may heat the movable plate 51. The heating mechanism 201 may heat the mold 40 except at least the mold attachment plate 81, the pressing insert fixing plate 99, and the pressing insert 101. For example, the temperature of heat is 130 ° C. to 150 ° C. for curing of the molding resin.

The cooling mechanism 203 may cool the presser insert 101 so that the temperature of the presser insert 101 becomes lower than the temperature of the containing portion 103. The cooling mechanism 203 may cool the insert component 20 via the pressing insert fixing plate 99 and the pressing insert 101.

For example, the cooling mechanism 203 has a pipe portion 203a through which a cooling medium such as cooling water flows. For example, the tube portion 203a is disposed on the mold attachment plate 81 to which the pressing insert fixing plate 99 to which the pressing insert 101 is fixed is attached. The pipe portion 203 a through which the cooling water flows cools the pressing insert 101 via the pressing insert fixing plate 99. The tube portion 203a may be a hole or a tube disposed in the hole. The tube portion 203 a is disposed inside the mold attachment plate 81. The temperature of the cooling water is, for example, 20 ° C. The tube portion 203a extends to the outside of the mold 40, and the cooling water is circulated at a maintained temperature.

Here, molding of the insert molded part 10 will be described.

The insert part 20 is molded by a mold not shown. The insert part 20 is in the state of satisfying the desired quality.

As shown in FIGS. 2B and 2C, the insert component 20 is held by the convex portion 53a of the movable mold 50 in a state where the fixed mold 80 is open to the movable mold 50. At this time, the inner peripheral surface of the side surface portion 25a abuts on the outer peripheral surface of the convex portion 53a, and the convex portion 25 is disposed around the cavity 55a. As shown in FIGS. 2B, 2C, and 3B, the pressing surface 101a is disposed apart from the curved surface portion 21.

Next, as shown in FIGS. 2D, 2E and 2F, the fixed mold 80 is closed relative to the movable mold 50 in order to supply the molding resin to the cavity 55a. As shown in FIG. 2D, FIG. 2E, FIG. 2F and FIG. 3C, when the fixed plate 87 abuts on the movable plate 51, the fixed insert 89 is fixed to the first movable insert 53 and the second movable insert 55. Abut. Furthermore, the cavity 91 communicates with the cavity 55 a, and the pressing surface 101 a abuts on the curved surface portion 21 to press the curved surface portion 21.

With the fixed mold 80 closed to the movable mold 50, the molten molding resin flows through the cavity 91 and is supplied to the cavity 55a. During supply, the heating mechanism 201 heats the sprue bush 85b, the runner plate 85, the fixing plate 87, and the fixed insert 89. The molding resin is cured by the heat transmitted from the sprue bush 85 b, the runner plate 85, the fixing plate 87, and the fixing insert 89. Thereby, the formed portion 30 is integrated with the insert part 20 at the same time as the formed portion 30 is formed in the cavity 55 a. Then, the insert molded part 10 is formed.

The fixed mold 80 opens relative to the movable mold 50 and the insert molding part 10 is removed from the mold 40 by the ejection of the ejection mechanism 65.

Next, pressing of the insert part 20 in the mold 40 will be described.

The fixed mold 80 opens relative to the movable mold 50 for removing the insert molded part 10 from the closed state in which the fixed mold 80 is closed relative to the movable mold 50 holding the insert part 20 for the supply of molding part resin In order to stabilize the position of the insert part 20 disposed in the mold 40 until the open state, the mold 40 needs to hold the insert part 20.

In the present embodiment, the pressing surface 101a of the pressing insert 101 presses the curved surface portion 21 of the insert component 20 by surface contact between the closed state of the fixed mold 80 and the open state of the fixed mold 80. Thereby, the position of the insert part 20 arrange | positioned at the metal mold | die 40 is stabilized.

The pressing surface 101 a has substantially the same shape and approximately the same size as the curved surface portion 21 of the insert part 20. The pressing surface 101a does not locally press the curved surface portion 21. The entire pressing surface 101a presses substantially the entire curved surface portion 21 with a substantially uniform force, and the pressing force of the pressing surface 101a is substantially the entire curved surface portion 21. It is added uniformly. Thereby, in insert molding, the deformation of the shape of the insert component 20 (specifically, the curved surface portion 21) and the change of the appearance due to the pressing can be suppressed. The appearance refers to, for example, the roughness of the surface. In addition, it is possible to suppress the deformation of the shape of the insert part 20 (specifically, the curved surface portion 21) and the change of the appearance due to pressing in insert molding between the closed state of the fixed mold 80 and the open state of the fixed mold 80. And the insert part 20 can be maintained in the state which satisfy | filled the desired quality, and the fall of the quality of the insert molding parts 10 containing the insert part 20 can be avoided.

The curved surface portion 21 is exposed to the outside and functions as an appearance portion when the insert molded part 10 is mounted on a member as one part. In the present embodiment, it is possible to suppress the deformation of the shape of the exposed curved portion 21 and the change of the appearance, and it is possible to avoid the deterioration of the quality of the insert molded part 10 including the insert part 20.

The pressing surface 101a is a smooth curved surface. Therefore, the pressing surface 101 a can stably press the insert component 20 without damaging the curved surface portion 21. And, even if the pressing surface 101 a presses the curved surface portion 21, it is possible to suppress the deformation of the shape of the insert part 20 and the change of the appearance.

The pressing surface 101 a can apply the pressing force of the pressing surface 101 a substantially uniformly to the entire surface of the curved surface 21 by surface contact with the curved surface 21.

The pressing surface 101 a presses the component toward the movable mold 50 in the direction in which the fixed mold 80 closes the movable mold 50. As a result, when the fixed mold 80 is closed to the movable mold 50, the pressing force can be transmitted from the pressing surface 101a to the curved surface 21 without waste, and the position of the insert part 20 disposed in the mold 40 can be stabilized.

The pressing surface 101 a of the elastic member has a hardness lower than the hardness of the insert part 20. Therefore, the pressing surface 101a can be pressed without damaging the curved surface portion 21, and it is possible to suppress the deformation of the shape of the insert part 20 (specifically, the curved surface portion 21) and the change of the appearance due to the pressing.

The elastic member is preferably, for example, PTFE. Therefore, compared with the elastic member which is rubber | gum, the pressing surface 101a along the shape of the curved surface part 21 can be processed easily. The compressive modulus of PTFE is about 500 Mpa or more. Also, the elastic member (presser insert 101) is not easily deformed by the injection pressure.

For example, it is assumed that the pressing insert 101 disposed in the mold 40, including the pressing surface 101a, has deteriorated over time. The elastic member (presser insert 101) which is PTFE can be easily processed by cutting. Thus, a new elastic member can be cut and this new elastic member can be easily replaced with a degraded elastic member. The pressing surface 101 a is not a separate body from the pressing insert 101, and is not a type to be attached to the pressing insert 101. Therefore, the pressing insert 101 including the pressing surface 101a can be easily replaced.

The pressing insert 101 including the pressing surface 101a has elasticity. Therefore, the pressing surface 101 a can be deformed along the shape of the curved surface portion 21. The pressing surface 101 a can press the insert component 20 along the shape of the curved surface portion 21 via the curved surface portion 21 by elasticity. In addition, when the pressing surface 101 a presses the curved surface portion 21, it is assumed that the pressing surface 101 a is deformed by the reaction force from the curved surface portion 21. However, when the fixed mold 80 opens with respect to the movable mold 50 and the reaction force is eliminated, the pressing surface 101a can be restored to the original state by the elasticity that is the restoring force of the pressing surface 101a.

In order to cure the molding resin, the heating mechanism 201 heats the molding resin through the sprue bush 85 b, the runner plate 85, the fixing plate 87, and the fixing insert 89. It is assumed that this heat is transmitted to the insert part 20 from the sprue bush 85b, the runner plate 85, the fixing plate 87 and the fixing insert 89. For convenience of explanation, most of the heat transfer here is referred to as the first heat transfer and the second heat transfer. The first heat transfer is, for example, transmission of heat from the runner plate 85, the fixing plate 87, and the fixing insert 89 to the pressing insert fixing plate 99 and the pressing surface 101a of the pressing insert 101, and insertion from the pressing surface 101a. The heat transfer to the curved surface portion 21 of the component 20 is shown. The second heat transfer is to indicate the transfer of heat from the fixed insert 89 to the side surface 25 a of the insert part 20.

In the present embodiment, the pressing insert fixing plate 99 and the pressing insert 101 are disposed apart from the containing portion 103 (the sprue bush 85 b, the runner plate 85, the fixing plate 87 and the fixing insert 89) including the cavity 91. The

gaps

97b, 97c, 97d are arranged. In the first heat transfer, the runner plate 85, the fixing plate 87, and the fixing insert 89 are formed by the arrangement of the pressing insert fixing plate 99 and the holding insert 101 separated from the containing portion 103 and the

gaps

97b, 97c, 97d. It is possible to suppress the transfer of heat from the to the pressing insert fixing plate 99 and the pressing insert 101. And it can suppress pressing the curved surface part 21 in the state which the pressing insert 101 had a heat | fever. This can suppress the heat from being applied to the insert part 20 formed of the thermoplastic resin material, and can suppress the deformation of the shape of the insert part 20 and the change of the appearance.

Further, a heat insulating plate 83 is disposed between the sprue bush 85 b and the runner plate 85 and the mold mounting plate 81. Therefore, the transfer of heat from the sprue bush 85b and the runner plate 85 to the curved surface portion 21 of the insert part 20 is suppressed via the mold mounting plate 81, the pressing insert fixing plate 99 and the pressing surface 101a of the pressing insert 101. . Further, it is assumed that heat is transferred to the heat insulating plate 83. In this case, the transfer of heat from the heat insulating plate 83 to the presser insert fixing plate 99 and the press insert 101 can be suppressed by the gap 97a. And it can suppress pressing the curved surface part 21 in the state which the pressing insert 101 had a heat | fever. Thereby, the softening of the insert part 20 by heat can be suppressed, and the deformation of the shape of the insert part 20 and the change of the appearance due to the softening can be suppressed.

The outer peripheral surface of the side surface portion 25a of the insert part 20 is disposed apart from the inclusion portion 103 (fixed insert 89) including the cavity 91, and a gap 97d is disposed. Therefore, in the second heat transfer, the heat transfer from the fixed insert 89 to the outer peripheral surface of the side surface 25a can be suppressed by the arrangement of the outer peripheral surface of the side surface 25a away from the containing portion 103 and the gap 97d. And, it is possible to suppress the softening of the insert part 20 including the side part 25a by heat, and to suppress the deformation of the shape of the insert part 20 and the change of the appearance due to the softening.

As described above, in the present embodiment, the

gaps

97a, 97b, 97c, 97d can suppress the transfer of heat to the presser insert fixing plate 99, the presser insert 101, and the insert component 20, and the heat of the insert component 20 is softened. It is possible to suppress the deformation of the shape of the insert part 20 and the change of the appearance due to the softening.

Further, the presser insert 101 is disposed on the die mounting plate 81 via the presser insert fixing plate 99, and on the die mounting plate 81, a pipe portion 203a through which the cooling water flows is disposed. The cooling water cools the pressing insert 101 and the pressing surface 101 a via the mold mounting plate 81 and the pressing insert fixing plate 99. Further, in the first heat transfer, heat is pressed from the containing portion 103 (the sprue bush 85b, the runner plate 85, the fixing plate 87, and the fixing insert 89) via the

gaps

97a, 97b, 97c, 97d. Even if it is transmitted to the insert 101, the pressing insert fixing plate 99, the pressing insert 101 and the pressing surface 101a are cooled by the cooling water. Then, the temperature of each of the pressing insert fixing plate 99, the pressing insert 101 and the pressing surface 101a is determined by the temperature of the containing portion 103 (the sprue bush 85b, the runner plate 85, the fixing plate 87 and the fixed insert 89) by the cooling water. It is lower than. Therefore, the transfer of heat from the pressing surface 101 a to the curved surface portion 21 of the insert part 20 can be suppressed. Moreover, the softening of the insert part 20 by heat can be suppressed, and the deformation of the shape of the insert part 20 and the change of the appearance due to the softening can be suppressed.

The cooling mechanism 203 cools the presser insert 101 and keeps the presser insert 101 at a low temperature so that the deformation of the shape and the change of the appearance of the insert component 20 due to softening can be suppressed and the insert component 20 can be kept hardened. You can keep it Therefore, for example, the cooling mechanism 203 may be directly disposed on the pressing insert 101 or the pressing insert fixing plate 99.

In the present embodiment, the curved surface portion 21 is disposed, and the pressing surface 101 a has substantially the same shape and approximately the same size as the curved surface portion 21 of the insert part 20. However, it is not necessary to limit to this. When the pressing surface 101a presses the flat surface of the insert part 20, the pressing surface 101a may have a substantially same shape and a substantially same size as this flat surface which is a part of the insert component 20, and in this case, becomes a flat surface. Therefore, the pressing surface 101a may have the same shape and size as the pressing target portion of the insert part 20.

[Modification]
Below, with reference to FIG. 4A, FIG. 4B, FIG. 5A, FIG. 5B, FIG. 6, and FIG. 7, the modification of the pressing insert 101 is demonstrated. In this modification, only differences from the embodiment are described.

In each modification, the pressing insert 101 (elastic member) has one or more convex portions 101 b disposed on the surface bottom 101 d of the pressing insert 101. For example, the plurality of convex portions 101 b are distributed at the surface bottom portion 101 d. The envelope surface of the plurality of convex portions 101 b contacts the curved surface portion 21 and presses the curved surface portion 21. The envelope surface is a facing portion of the convex portion 101 b facing the curved surface portion 21 and functions as a pressing surface 101 a. Therefore, in the present modification, the pressing surface 101a is formed by enveloping a plurality of convex portions 101b, and the pressing insert 101 (elastic member) contacts the curved surface portion 21 at the pressing surface 101a of the convex portion 101b. In the first and second modifications shown in FIGS. 4A, 4B, 5A, and 5B, when the presser insert 101 presses the curved surface portion 21, the presser insert 101 has a plurality of convex portions 101b having a press surface 101a. Contact the curved surface portion 21 at multiple points.

In the first modification, as shown in FIG. 4A and FIG. 4B, the convex portion 101b has a columnar shape, for example, a cylindrical shape. For example, the convex portions 101 b are arranged at equal intervals from one another, and have the same height. The convex portion 101 b has an envelope surface facing the curved surface portion 21 and a pressing surface 101 a which is an end surface.

When the pressing surface 101a which is an envelope surface and an end surface presses the curved surface portion 21, the pressing surface 101a can contact the curved surface portion 21 and, more specifically, can surface contact the curved surface portion 21. The term "surface contact" as used herein means, for example, that the entire facing portion of the pressing surface 101a facing the curved surface portion 21 contacts the curved surface portion 21.

For example, the convex portion 101 b is integral with the pressing insert 101 which is an elastic member. Therefore, when the pressing surface 101 a contacts the curved surface portion 21, the pressing surface 101 a can be deformed along the shape of the curved surface portion 21. Then, the pressing insert 101 can make surface contact with the curved surface portion 21 with the plurality of pressing surfaces 101a, and can adjust the contact area by the deformation of the convex portion 101b at the time of contact.

When the pressing surface 101a which is an envelope surface presses the curved surface portion 21, the convex portion 101b is crushed and makes surface contact with the curved surface portion 21, and the surface bottom portion 101d excluding the convex portion 101b also makes surface contact with the curved surface portion 21 as a pressing surface. It is also good.

In the second modification, as shown in FIGS. 5A and 5B, the convex portion 101b may have a spherical shape, for example, a hemispherical shape.

When the pressing surface 101a which is an envelope surface presses the curved surface portion 21, the hemispherical pressing surface 101a can be in contact with the curved surface portion 21. In detail, the curved surface portion 21 can be in point contact. Point contact here indicates contact in a narrower range than surface contact.

In the third modification, as shown in FIG. 6, the plurality of convex portions 101 b may be arranged in a band shape. The plurality of convex portions 101 b may be arranged in parallel to one another. In the third modification, as in the first modification, the pressing surface 101 a can contact the curved surface 21, and more specifically can contact the curved surface 21.

In the fourth modification, as shown in FIG. 7, the convex portions 101 b may be arranged in a lattice. In the fourth modification, as in the first modification, the pressing surface 101 a can contact the curved surface 21, and more specifically can contact the curved surface 21.

The present invention is not limited to the above embodiment, and can be variously modified in the implementation stage without departing from the scope of the invention. In addition, the embodiments may be implemented in combination as appropriate, in which case the combined effect is obtained. Furthermore, various inventions are included in the above-described embodiment, and various inventions can be extracted by a combination selected from a plurality of disclosed configuration requirements. For example, even if some configuration requirements are deleted from all the configuration requirements shown in the embodiment, the problem can be solved, and if an effect is obtained, a configuration from which this configuration requirement is removed can be extracted as the invention.

Claims

A mold for insert molding, in which the insert part and the resin supplied to the insert part are integrally formed in a state where the heat-softenable insert part is disposed inside the mold,
A mold comprising a presser insert including an elastic member which presses a part of the insert part when the mold is closed and which has a press surface having substantially the same shape and size as the part of the insert part.
The mold according to claim 1, wherein when the pressing surface presses the part, the pressing surface applies a pressing force substantially uniformly to the part.
The mold according to claim 1, wherein the pressing surface has substantially the same shape and the same size as the curved surface portion which is the part of the insert part.
The mold according to claim 3, wherein the pressing surface is in surface contact with the curved surface portion.
The mold according to claim 3, wherein the elastic member has the pressing surface formed by enveloping a plurality of protrusions, and contacts the curved surface portion at the pressing surface of the protrusion.
The mold according to claim 5, wherein the convex portion has a columnar shape, and the pressing surface is in surface contact with the curved surface portion.
The mold according to claim 5, wherein the convex portion has a hemispherical shape, and the pressing surface is in point contact with the curved surface portion.
The mold according to claim 5, wherein the convex portion is arranged in a band shape.
The said convex part is a metal mold | die of Claim 5 arrange | positioned in the grid | lattice form.
The mold is
A movable type for holding the insert part;
A fixed type which has the pressing insert and which opens and closes with respect to the movable type;
Have
The mold according to claim 1, wherein the pressing surface presses the insert component toward the movable mold in a direction in which the fixed mold closes with respect to the movable mold.
The gold according to claim 1, wherein the part of the insert part is exposed to the outside when an insert-molded part formed integrally with the insert part and the resin is mounted on a member as one part. Type.
The mold according to claim 1, wherein the elastic member has a hardness lower than the hardness of the insert part.
The mold according to claim 1, wherein the elastic member comprises a resin material.
The mold according to claim 13, wherein the resin material comprises PTFE.
It further comprises an inclusion including a cavity for supplying the resin to the insert part,
The inclusion portion is disposed around the insert part,
The mold according to claim 1, wherein the pressing insert is disposed apart from the inclusion portion.
It further comprises an inclusion including a cavity for supplying the resin to the insert part,
The inclusion portion is disposed around the insert part and has a tubular shape.
The pressing insert is disposed inside the inclusion portion,
The mold according to claim 1, wherein an outer peripheral surface of the pressing insert is disposed apart from an inner peripheral surface of the inclusion portion.
It further comprises an inclusion including a cavity for supplying the resin to the insert part,
The inclusion portion is disposed around the insert part and has a tubular shape.
When the mold is closed, the insert component disposed in the mold is disposed inside the inclusion portion, and the inner circumferential surface of the inclusion portion is disposed away from the outer circumferential side surface of the insert component The mold according to claim 1.
It further comprises an inclusion including a cavity for supplying the resin to the insert part,
The inclusion portion is disposed around the insert part,
The mold according to claim 1, further comprising a cooling mechanism that cools the presser insert so that the temperature of the presser insert becomes lower than the temperature of the inclusion portion.
The mold according to claim 18, wherein the cooling mechanism has a pipe portion through which a cooling medium flows.
20. The mold according to claim 19, wherein the pipe portion is disposed on a mold mounting plate to which a pressing insert fixing plate to which the pressing insert is fixed is attached.