JP5440206B2 - Manufacturing method and manufacturing apparatus for resin cylinder head cover - Google Patents

Description

  The present invention relates to a method and an apparatus for manufacturing a resin cylinder head cover, and more particularly, it is possible to prevent deformation of a hole portion of an oil control valve holder during insert molding, and to damage and deform the mounting surface of the oil control valve holder. The present invention relates to a manufacturing method and a manufacturing apparatus for a resin cylinder head cover that can prevent the above-described problem.

  2. Description of the Related Art Conventionally, a cylinder head cover for an internal combustion engine is generally known in which a metal OCV holder for attaching an oil control valve (hereinafter abbreviated as “OCV”) to a cover body is retrofitted with a bolt. It has been. The OCV holder is usually formed with a hole for mounting the OCV and a communication path that connects the OCV oil path to the cylinder head side oil path and the like. However, this cylinder head cover has a problem that the manufacturing cost is increased because the OCV holder is retrofitted, and the manufacturing cost is increased.

  Thus, as a cylinder head cover that solves the above problem, a resin cylinder head cover in which an OCV holder is integrated by insert molding has been proposed (see, for example, Patent Document 1). In this Patent Document 1, as an OCV holder, a mounting surface to a cylinder head, a hole portion in an axial direction inclined to the surface direction of the mounting surface, and two surface portions facing an opening portion of the hole portion, (See FIG. 6 of Patent Document 1). At the time of insert molding of this OCV holder, a relatively large resin pressure is applied to the surface portion having the larger area out of the two surface portions. For example, as shown by the phantom line in FIG. 11, the lower corner side of the OCV holder 103 is deformed. The hole 107 may also be deformed (see, for example, FIG. 12B). If the hole of the OCV holder is deformed in this way, there is a risk that oil leakage will occur between the OCV holder and the OCV when the cylinder head cover is used. Therefore, in the said patent document 1, it prevents the hole part of an OCV holder from deform | transforming as the state which made the whole mounting surface of the OCV holder contact | abut the lower mold | type at the time of insert molding (refer patent document 1). (See FIGS. 13 and 14).

JP 2007-107479 A

  By the way, in the OCV holder, it is difficult to simultaneously increase the dimensional accuracy of the hole portion and the mounting surface of the cylinder head cover with respect to the cover body. For example, the dimensional accuracy of the hole portion with respect to the cover body is increased and the dimensional accuracy of the mounting surface is decreased. To be done. In this case, in the resin cylinder head cover, since the entire mounting surface of the OCV holder is in contact with the lower mold, the mounting surface of the OCV holder may be scratched or deformed due to excessive pressing. easy. As a result, oil leakage may occur between the OCV holder and the cylinder head when the cylinder head cover is used.

  The present invention has been made in view of the above situation, and can prevent deformation of the hole portion of the oil control valve holder at the time of insert molding, and can prevent scratching and deformation of the mounting surface of the oil control valve holder. An object of the present invention is to provide a manufacturing method and a manufacturing apparatus for a resin cylinder head cover.

The present invention is as follows.
1. A method of manufacturing a resin cylinder head cover in which an oil control valve holder is integrated by insert molding,
The oil control valve holder has a mounting surface to the cylinder head, a hole portion in an axial direction inclined in the surface direction of the mounting surface, and two surface portions facing the opening portion of the hole portion. And
A step of setting the oil control valve holder in one of a pair of molds that can approach and separate from each other;
Capping the pair of molds and injecting a resin,
In the step of injecting the resin, a state in which the pressing insert is in contact with the mounting surface in the vicinity of the larger surface portion of the two surface portions of the oil control valve holder set in the one mold A method for manufacturing a resin cylinder head cover.
2. The pair of molds has a mold structure in which a thickness of a molding space in the vicinity of a surface portion having a smaller area of the two surface portions of the oil control valve holder is thinner than thicknesses of other molding spaces. . The manufacturing method of the resin-made cylinder head cover of description.
3. An apparatus for manufacturing a resin cylinder head cover in which an oil control valve holder is integrated by insert molding,
The oil control valve holder has a mounting surface to the cylinder head, a hole portion in an axial direction inclined in the surface direction of the mounting surface, and two surface portions facing the opening portion of the hole portion. And
A pair of molds that can be close to and away from each other;
A pressing insert capable of contacting the mounting surface in the vicinity of the larger surface portion of the two surface portions of the oil control valve holder set in one of the pair of molds; An apparatus for manufacturing a resin cylinder head cover, comprising:

According to the resin cylinder head cover manufacturing method and manufacturing apparatus of the present invention, when the pair of molds are clamped and the resin is injected, of the two surface portions of the oil control valve holder set in one mold. The pressing insert is brought into contact with the mounting surface in the vicinity of the surface portion having the larger area, and the pressing insert is not in contact with the mounting surface other than in the vicinity of the surface portion. As a result, a relatively easily deformable portion of the mounting surface of the oil control valve holder at the time of insert molding is intensively supported by the pressing insert, so that deformation of the hole of the oil control valve holder can be prevented. . Further, since the portion of the mounting surface of the oil control valve holder that is relatively difficult to deform is not supported by the pressing insert, it is possible to prevent deformation of the mounting surface due to scratches or excessive pressing.
Further, the pair of molds has a mold structure in which the thickness of the molding space in the vicinity of the narrower surface portion of the two surface portions of the oil control valve holder is thinner than the thickness of the other molding spaces. In this case, since the cooling of the resin near the surface of the oil control valve holder with a smaller area is promoted by the thin molding space, the resin in the gap between the mounting surface of the oil control valve holder and the pressing insert Intrusion can be prevented.

The present invention will be further described in the following detailed description with reference to the drawings referred to, with reference to non-limiting examples of exemplary embodiments according to the present invention. Similar parts are shown throughout the several figures.
It is a principal part longitudinal cross-sectional view of an engine provided with the cylinder head cover (state which attached OCV) which concerns on an Example. It is a principal part longitudinal cross-sectional view of an engine provided with the cylinder head cover (state before mounting | wearing OCV) which concerns on an Example. It is explanatory drawing for demonstrating the OCV holder which concerns on an Example, (A) shows the front view of an OCV holder, (B) shows the side view of an OCV holder. It is a perspective view of the OCV holder. It is explanatory drawing for demonstrating the manufacturing method of the said cylinder head cover. It is explanatory drawing for demonstrating the manufacturing method of the said cylinder head cover. It is explanatory drawing for demonstrating the manufacturing method of the said cylinder head cover. It is a principal part enlarged view of FIG. It is explanatory drawing for demonstrating the manufacturing method of the said cylinder head cover. It is explanatory drawing for demonstrating the nested pin of another form. It is explanatory drawing for demonstrating the manufacturing method of the conventional cylinder head cover. It is a XII arrow line view of FIG. 11, (A) shows the state before shaping | molding of the hole part of an OCV holder, (B) shows the state after shaping | molding of the hole part of an OCV holder.

  The items shown here are exemplary and illustrative of the embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

1. Method for Manufacturing Resin Cylinder Head Cover Embodiment 1 The resin cylinder head cover manufacturing method according to the present invention is a resin cylinder head cover manufacturing method in which an oil control valve holder (hereinafter also abbreviated as “OCV holder”) is integrated by insert molding. It has a mounting surface to the cylinder head, an axially inclined hole inclined in the surface direction of the mounting surface, and two surface parts facing the opening of the hole, and can be close to and separated from each other. A step of setting the OCV holder in one of the pair of molds and a step of injecting resin by clamping the pair of molds. In the step of injecting resin, the OCV holder is set in one of the molds. The pressing insert is brought into contact with the mounting surface in the vicinity of the larger surface portion of the two surface portions of the OCV holder (for example, FIG. 7). Irradiation).

  The abutting interval (L1) between the pressing insert and the mounting surface of the OCV holder is, for example, 0.5 to from the leading edge of the mounting surface that intersects the larger surface portion toward the smaller surface portion. It can be 5 mm (see, for example, FIG. 8). Moreover, the clearance gap (L2) between the pressing insert and the mounting surface of the OCV holder can be, for example, 0.05 to 0.2 mm (for example, see FIG. 8).

  Embodiment 1 above. As for the method of manufacturing the resin cylinder head cover, for example, the pair of molds has a different thickness (t1) of the molding space (s1) in the vicinity of the smaller surface portion of the two surface portions of the OCV holder. A form having a mold structure that is thinner than the thickness (t2, t3) of the molding space (s2, s3) can be given (for example, see FIG. 8). Examples of the “other molding space” include a molding space (s2) in the vicinity of the surface portion having the larger area, and a cylindrical molding space (s3) on the outer peripheral side of the hole (see FIG. For example, see FIG.

  Embodiment 1 above. As a method of manufacturing a resin cylinder head cover, for example, in the step of injecting the resin, a form in which a nesting pin is inserted into a hole of an OCV holder set in one mold can be exemplified (for example, FIG. 7). According to this embodiment, when the pair of molds are clamped and the resin is injected, the nesting pins are inserted into the holes of the OCV holder set in one of the molds. Thereby, since the whole hole portion of the OCV holder is supported by the insert pin at the time of insert molding, the hole portion is prevented from being deformed by the resin filling pressure at the time of molding and the shrinkage after the molding.

  For example, the nesting pin may have a shaft diameter tolerance of h7 to m6 according to JIS standards, and a hole diameter tolerance of the hole portion of the OCV holder may be H7 according to JIS standards. Thereby, a deformation | transformation of the hole of an OCV holder can be prevented more reliably at the time of insert molding. Further, the nesting pin can have, for example, a large diameter portion inserted into the hole portion of the OCV holder and a small diameter portion connected to the large diameter portion in the axial direction and inserted into the hole portion of the OCV holder. (For example, see FIG. 10). Thereby, in the hole portion of the OCV holder, a relatively large resin pressure is applied at the time of molding, and a large diameter portion can be inserted corresponding to a portion that is easily deformed to prevent the hole portion from being deformed. Insertion can be improved by inserting a small-diameter portion corresponding to a portion that is difficult to be deformed.

  In the above-described embodiment, for example, when inserting the nesting pin into the hole of the OCV holder, the OCV holder can be heated. Thereby, the hole of the oil control valve holder is expanded by this heating, so that the insertability of the nesting pin is improved. The heating temperature of the OCV holder can be, for example, 30 to 100 degrees (preferably 50 to 80 degrees). Further, this OCV holder can be preheated by a heating means such as a heater before being set in one mold, for example. Thereby, an OCV holder can be heated efficiently.

  In the above embodiment, for example, in the step of setting the OCV holder, the OCV holder in which the nesting pin is inserted into the hole can be set (see, for example, FIG. 6). Thereby, a nesting pin can be more smoothly inserted into the hole of the OCV holder.

  In the above-described form, for example, in the step of injecting the resin, a form in which the support mold that clamps in cooperation with the pair of molds is in contact with the shaft end side of the nesting pin can be exemplified (for example, FIG. 7). Thereby, a nest pin can be supported more certainly at the time of fabrication.

2. Apparatus for manufacturing a resin cylinder head cover Embodiment 2 FIG. The resin cylinder head cover manufacturing apparatus according to the present invention is a resin cylinder head cover manufacturing apparatus in which an oil control valve holder (hereinafter also abbreviated as “OCV holder”) is integrated by insert molding. It has a mounting surface to the cylinder head, an axially inclined hole inclined in the surface direction of the mounting surface, and two surface parts facing the opening of the hole, and can be close to and separated from each other. A pair of molds, and a pressing nest that can come into contact with the mounting surface in the vicinity of the larger surface portion of the two surface portions of the OCV holder set in one of the pair of molds, (See, for example, FIG. 7).

  Examples of the pressing insert include the first embodiment. And the structure of the pressing insert described in the method for manufacturing the resin cylinder head cover can be given. In addition, as the pair of molds, for example, the first embodiment. And a configuration of a pair of molds described in the method for manufacturing a resin cylinder head cover.

  Embodiment 2 above. As a resin cylinder head cover manufacturing apparatus, for example, a pressing insert that displaces the pressing insert between a contact position where it comes into contact with the mounting surface of the OCV holder and a spaced position separated from the mounting surface of the OCV holder. The form which further has a displacement means can be mentioned. As a result, the oil control valve holder can be easily set with respect to one of the molds with the pressing insert positioned at the separated position. Examples of the pressing insert displacement means include: (1) a configuration including a driving source (for example, a cylinder, a driving motor, etc.) that slides the pressing insert with respect to one mold, and (2) a pair of molds relative to each other. The form provided with the power conversion mechanism which converts a movement into a slide movement of a pushing insert can be mentioned.

  Embodiment 2 above. As an apparatus for manufacturing a cylinder head cover made of resin, for example, there can be cited a form further including a nesting pin that can be inserted into a hole of an OCV holder set in one of a pair of molds (for example, FIG. 7). According to this embodiment, when the pair of molds are clamped and the resin is injected, the nesting pins are inserted into the holes of the OCV holder set in one of the molds. Thereby, since the whole hole portion of the OCV holder is supported by the insert pin at the time of insert molding, the hole portion is prevented from being deformed by the resin filling pressure at the time of molding and the shrinkage after the molding.

  Examples of the nesting pin include the first embodiment. Examples of the construction of the nesting pin described in the method for producing a resin cylinder head cover can be given.

  Hereinafter, the present invention will be specifically described with reference to the drawings.

(1) Configuration of Cylinder Head Cover As shown in FIGS. 1 and 2, the cylinder head cover 1 according to this embodiment includes a resin cover body 2 and an oil control valve integrated with the cover body 2 by insert molding. Holder 3 (hereinafter also abbreviated as “OCV holder 3”).

  As shown in FIGS. 3 and 4, the OCV holder 3 includes a cylindrical sleeve 4 and a hydraulic oil supply connection portion 5 connected to the sleeve 4. In the present embodiment, the material of the OCV holder 3 is a metal (for example, aluminum alloy) having the same thermal expansion coefficient as that of the spool housing 14a of the OCV 14 (see FIG. 1).

  The hydraulic oil supply connecting portion 5 is formed with a mounting surface 6 that is in close contact with the upper surface of the cam cap 11 (see FIG. 1) via a gasket 12. Further, the sleeve 4 is formed with a hole 7 that is an axial direction inclined with respect to the surface direction of the mounting surface 6 of the connecting portion 5 for supplying hydraulic fluid. The tolerance of the hole diameter of the hole 7 is H7 in the JIS standard. Further, the OCV holder 3 is provided with two surface portions 8 a and 8 b facing the opening portion of the hole portion 7. One of the surface portions 8a and 8b has a larger area than the other surface portion 8b. In addition, a concave portion 9 is formed on the surface portion 8a to prevent the formation of nests.

  1 and 2, the hydraulic oil supply connecting portion 5 has holes corresponding to the five ports P1, P2, P3, P4, and P5 provided in the spool housing 14a of the OCV 14. Oil holes 10a, 10b, 10c, 10d, and 10e are formed at positions. Of these oil holes 10a to 10e, the three oil holes 10a, 10b, and 10c corresponding to the three ports P2, P4, and P5 are open to the mounting surface 6 of the hydraulic oil supply connecting portion 5. Further, the oil holes 10 d and 10 e are opened in the internal space of the cylinder head cover 1.

  Of the oil holes 10a to 10e, the oil hole 10c is a hydraulic oil supply oil hole that is supplied with high-pressure hydraulic oil from a hydraulic pump via an oil passage on the cylinder head 100 side. The oil holes 10a and 10b are selectively supplied with high-pressure hydraulic oil from the oil hole 10c through the OCV 14, and supply high-pressure hydraulic oil to an advance chamber or a retard chamber in a variable valve mechanism (not shown). This is a hydraulic oil supply oil hole. Further, when one of the oil holes 10a and 10b supplies high-pressure hydraulic oil to the variable valve mechanism side, the other is used as a path for discharging the hydraulic oil from the variable valve mechanism side. Furthermore, the oil holes 10d and 10e are arranged so that when either of the oil holes 10a and 10b discharges the hydraulic oil from the variable valve mechanism side, the hydraulic oil discharged via the OCV 14 is directly discharged into the internal space of the cylinder head cover 1. This is a hydraulic oil discharge oil hole to be discharged.

(2) Cylinder Head Cover Manufacturing Apparatus Next, the cylinder head cover manufacturing apparatus 20 will be described. As shown in FIGS. 6 and 7, the manufacturing apparatus 20 includes a fixed mold 21 and a movable mold 22 (illustrated as “a pair of molds” according to the present invention), and the fixed mold 21 and the movable mold 22. A support mold 24 that works and clamps the mold, a nesting pin 23, and a pressing nesting 25 are provided. The movable mold 22 (illustrated as “one mold” according to the present invention) can be moved toward and away from the fixed mold 21 in the horizontal direction. The nesting pin 23 can be inserted into the hole 7 of the OCV holder 3 set in the concave portion 22 b of the movable mold 22. Further, the pressing insert 25 can be brought into contact with the mounting surface 6 in the vicinity of the larger surface portion 8a of the two surface portions 8a, 8b of the OCV holder 3 set in the recess 22b of the movable die 22. Has been.

  The shaft diameter tolerance of the nesting pin 23 is h7 in the JIS standard. Further, as shown in FIG. 5, a taper portion 23 a that is reduced in diameter toward the tip is provided on one shaft end side of the nesting pin 23 in order to improve the insertion property into the hole portion 7 of the OCV holder 3. Yes. A head 23 b is provided on the other shaft end side of the nesting pin 23.

  As shown in FIGS. 6 and 7, the support die 24 is supported so as to be slidable along the axial direction of the hole 7 of the OCV holder 3 set in the recess 22b of the movable die 22. It is slid by a driving means (not shown). By this sliding movement, the support die 24 is clamped in cooperation with the fixed die 21 and the movable die 22, and the nesting pin 23 inserted into the hole 7 of the OCV holder 3 set in the movable die 22. It comes into contact with the head 23b.

  As shown in FIG. 8, a contact surface 25 a that can contact the mounting surface 6 in the vicinity of the surface portion 8 a of the OCV holder 3 set on the movable mold 22 and an OCV holder And an inclined non-contact surface 25 b that does not contact the three mounting surfaces 6. The contact interval L1 between the contact surface 25a of the pressing insert 25 and the mounting surface 6 of the OCV holder 3 is about 2 mm from the front edge of the mounting surface 6 intersecting the surface portion 8a toward the surface portion 8b. . The maximum gap distance L2 between the non-contact surface 25b of the pressing insert 25 and the mounting surface 6 of the OCV holder 3 is about 0.1 mm.

  Further, as shown in FIGS. 6 and 7, the pressing insert 25 is supported so as to be movable along a moving direction of the movable mold 22 in a passage 22 a formed in the movable mold 22. (The illustration is omitted) The moving force of the movable mold 22 is converted and slid. By this sliding movement, the pressing insert 25 is separated from the contact position P1 (see FIG. 7) where the contact surface 25a contacts the mounting surface 6 of the OCV holder 3 and the mounting surface 6 of the OCV holder 3. It is displaced between the separation position P2 (see FIG. 6).

  Here, as shown in FIG. 8, the fixed die 21 and the movable die 22 have a thickness t1 (about 0.5 mm) of the molding space s1 in the vicinity of the surface portion 8b of the OCV holder 3, so that the surface portion 8a of the OCV holder 3 The mold structure is thinner than the thickness t2 (about 2 mm) of the nearby molding space s2 and the thickness t3 (about 2 mm) of the cylindrical molding space s3 on the outer peripheral side of the hole 7 of the OCV holder 3.

(3) Manufacturing method of cylinder head cover Next, the manufacturing method of the cylinder head cover 1 is demonstrated. First, the OCV holder 3 is preheated to about 60 ° C. by heating means such as a heater. Next, as shown in FIG. 5, the insert pin 23 is inserted into the hole 7 of the heated OCV holder 3.

  Next, as shown in FIG. 6, the OCV holder 3 in which the nesting pin 23 is inserted is set in the recess 22 b of the movable mold 22 in the mold open state. In this mold open state, the pressing insert 25 is located at the separation position P2. After that, as shown in FIG. 7, the movable mold 22 and the support mold 24 are slid relative to the fixed mold 21 to clamp the mold, and the pressing insert 25 at the separation position P2 is slid to the contact position P1. Then, the support die 24 comes into contact with the shaft end side of the nesting pin 23 attached to the hole 7 of the OCV holder 3 set on the movable die 22. Further, the contact surface 25a of the pressing insert 25 contacts the mounting surface 6 of the OCV holder 7 (see FIG. 8).

  Next, the molten resin r is poured into a molding space (cavity) formed between the fixed mold 21, the movable mold 22 and the support mold 24 from the above-described mold clamping state and cooled. Next, as shown in FIG. 9, the movable mold 22 and the support mold 24 are slid with respect to the fixed mold 21 to open the mold, and the pressing insert 25 at the contact position P <b> 1 is slid to the separation position P <b> 2. From this state, the molded product is taken out from the movable mold 22 and the insert pin 23 is taken out from the hole 7 of the OCV holder 3 to obtain the cylinder head cover 1.

(4) Effects of the Embodiment From the above, according to the method for manufacturing the resin cylinder head cover 1 of the present embodiment, the fixed mold 21 and the movable mold 22 are clamped to the movable mold 22 when the resin is injected. Since the nesting pin 23 is inserted into the hole 7 of the OCV holder 3, the entire hole 7 of the OCV holder 3 is supported by the nesting pin 23 at the time of insert molding, and the resin filling pressure at molding and after molding The hole 7 is prevented from being deformed by the contraction.

  Further, in this embodiment, since the OCV holder 3 is heated when the nest pin 23 is inserted into the hole 7 of the OCV holder 3, the hole 7 of the OCV holder 3 is expanded by this heating, and the nest pin 23 is improved.

  In this embodiment, when the fixed mold 21 and the movable mold 22 are clamped and the resin is injected, the insert 25 is pressed against the mounting surface 6 near the surface portion 8a of the OCV holder 3 set in the movable mold 22. Since the pressing insert 25 is not brought into contact with the mounting surface 6 other than the vicinity of the surface portion 8a, a relatively deformable portion of the mounting surface 6 of the OCV holder 3 is pressed during insert molding. It is supported intensively by the insert 25 and can prevent deformation of the hole 7 of the OCV holder 3. Further, a portion of the mounting surface 6 of the OCV holder 3 that is relatively difficult to deform is not supported by the pressing insert 25, and deformation due to scratching or excessive pressing of the mounting surface 6 can be prevented. In this embodiment, the concave portion 9 is formed in the surface portion 8a of the OCV holder 3, and extremely large resin pressure is applied in the vicinity of the concave portion 9, but the mounting in the vicinity of the surface portion 8a of the OCV holder 3 is performed. Since the pressing insert 25 is pressed against the surface 6 and supported, deformation of the OCV holder 3 and the hole 7 is prevented.

  Further, in this embodiment, as the fixed mold 21 and the movable mold 22, a mold in which the thickness t1 of the molding space s1 near the surface portion 8b of the OCV holder 3 is thinner than the thicknesses t2 and t3 of the other molding spaces s2 and s3. Since the structure having the structure is adopted, cooling of the resin in the vicinity of the surface portion 8b of the OCV holder 3 is promoted by the thin molding space s1, and the resin in the gap between the mounting surface 6 of the OCV holder 3 and the pressing insert 25 is used. Can be prevented from entering.

  Further, in this embodiment, the pressing insert 25 is displaceable between the contact position P1 and the separation position P2, so that the concave portion of the movable die 22 is placed in a state where the pressing insert 25 is positioned at the separation position P2. The OCV holder 3 can be easily set with respect to 22b.

  In the present invention, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. That is, in the above embodiment, the shaft pin inserted into the hole 7 of the OCV holder 3 has the same diameter as the nesting pin 23. However, the present invention is not limited to this, for example, as shown in FIG. A large-diameter portion 31 inserted into the hole portion 7 in the vicinity of the surface portion 8a of the OCV holder 3, and a small-diameter portion that is connected to the large-diameter portion 31 in the axial direction and inserted into the hole portion 7 other than the vicinity of the surface portion 8a of the OCV holder 3. A nesting pin 30 having a portion 32 can be employed. As a result, in the hole 7 of the OCV holder 3, the large diameter portion 31 can be inserted corresponding to a portion that is easily deformed due to a relatively large resin pressure during molding, and deformation of the hole can be prevented. Insertion can be improved by inserting the small-diameter portion 32 corresponding to a portion that is hard to be deformed due to resin pressure.

  In the above embodiment, the insert pin 23 is inserted into the hole 7 of the OCV holder 3 and then the OCV holder 3 is set to the movable mold 22. However, the present invention is not limited to this. For example, the OCV holder 3 may be set in the movable mold 22, and the insert pin 23 may be inserted into the hole 7 of the OCV holder 3. In this case, for example, heating means such as a heater may be provided in the movable mold 22 to heat the OCV holder 3 set in the movable mold 22.

  Furthermore, in the said Example, although the fixed type | mold 21 and the movable mold | type 22 which approach / separate to an up-down direction were illustrated as a pair of type | mold, it is not limited to this, For example, a pair of type | molds which approach / separate in a horizontal direction are employ | adopted. Also good.

  The foregoing examples are for illustrative purposes only and are not to be construed as limiting the invention. Although the invention has been described with reference to exemplary embodiments, it is to be understood that the language used in the description and illustration of the invention is illustrative and exemplary rather than limiting. As detailed herein, changes may be made in its form within the scope of the appended claims without departing from the scope or spirit of the invention. Although specific structures, materials, and examples have been referred to in the detailed description of the invention herein, it is not intended to limit the invention to the disclosure herein, but rather, the invention is claimed. It covers all functionally equivalent structures, methods and uses within the scope of.

  The present invention is not limited to the embodiments described in detail above, and various modifications or changes can be made within the scope of the claims of the present invention.

  It is widely used as a technique for manufacturing a resin cylinder head cover for an internal combustion engine formed by insert molding a metal OCV holder.

  DESCRIPTION OF SYMBOLS 1; Cylinder head cover, 3; OCV holder, 6; Mounting surface, 7; Hole part, 8a, 8b; Surface part, 20: Manufacturing apparatus, 21; Fixed type | mold, 22: Movable type | mold, 23, 30; Pushing insert, P1; contact position, P2; separation position, s1, s2, s3; molding space.

Claims (3)

A method of manufacturing a resin cylinder head cover in which an oil control valve holder is integrated by insert molding,
The oil control valve holder has a mounting surface to the cylinder head, a hole portion in an axial direction inclined in the surface direction of the mounting surface, and two surface portions facing the opening portion of the hole portion. And
A step of setting the oil control valve holder in one of a pair of molds that can approach and separate from each other;
Capping the pair of molds and injecting a resin,
In the step of injecting the resin, a state in which the pressing insert is in contact with the mounting surface in the vicinity of the larger surface portion of the two surface portions of the oil control valve holder set in the one mold A method for manufacturing a resin cylinder head cover.   The pair of molds has a mold structure in which a thickness of a molding space in the vicinity of a smaller surface portion of the two surface portions of the oil control valve holder is thinner than thicknesses of other molding spaces. A method for producing a resin cylinder head cover according to claim 1. An apparatus for manufacturing a resin cylinder head cover in which an oil control valve holder is integrated by insert molding,
The oil control valve holder has a mounting surface to the cylinder head, a hole portion in an axial direction inclined in the surface direction of the mounting surface, and two surface portions facing the opening portion of the hole portion. And
A pair of molds that can be close to and away from each other;
A pressing insert capable of contacting the mounting surface in the vicinity of the larger surface portion of the two surface portions of the oil control valve holder set in one of the pair of molds; An apparatus for manufacturing a resin cylinder head cover, comprising:

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