JP5405359B2 - Mold device for molding pedestrian protection device for vehicle - Google Patents

Description

  The present invention relates to a molding die device for a pedestrian protection device for a vehicle, and in particular, a resin molding that is installed at a lower part of a front portion of a vehicle for the purpose of protecting a pedestrian that has collided with or contacted the front of the vehicle. The present invention relates to a molding die device that can advantageously form a vehicle pedestrian protection device comprising a body.

  Conventionally, in vehicles such as automobiles, various protection devices have been installed on the front, rear, or side surfaces of the vehicle mainly for the purpose of absorbing impact energy generated in the event of a collision and protecting the vehicle body and passengers. ing. In recent years, a device for protecting a pedestrian when a pedestrian collides (contacts) with the front of the vehicle has also been installed on the front of the vehicle.

  As a kind of such a pedestrian protection device, a so-called leg cleaning device is known. This leg washer is installed at the lower part of the front part of the vehicle, and acts on the legs of the pedestrian by applying a reaction force against the impact load input when the pedestrian collides with or touches the front of the vehicle. The pedestrian is protected and safe by receiving a person with a shock absorbing member such as a bonnet.

  Various structures have been proposed for such pedestrian protection devices. For example, Japanese Patent Application Laid-Open No. 2002-264741 (Patent Document 1) or the like includes a resin molded body that is attached to a lower portion of a front portion of a vehicle so as to extend in the front-rear direction of the vehicle, and has a front end thereof. In this section, a pedestrian protection device has been proposed that is configured to protect the pedestrian by contacting the pedestrian's leg that has collided with or touched the front of the vehicle.

  Since the pedestrian protection apparatus having such a structure is formed of a resin molded product molded by injection molding, excellent moldability and sufficient lightness can be ensured. However, on the other hand, the following points to be improved were inherent.

  That is, a pedestrian protection device made of a resin molded product having the structure as described above is often attached to the lower part of a vehicle with its front end side part entering the inside of the front bumper. Depending on the type of vehicle, it has various design shapes. Therefore, in the pedestrian protection device, the front end side portion is mainly formed in different shapes for each type of vehicle to be attached. Therefore, conventionally, when injection molding is performed on a pedestrian protection device attached to a plurality of vehicle types, a plurality of types of mold devices having different overall structures and having molding cavities of different shapes have been used. In addition, when a vehicle type to which the pedestrian protection device should be attached is changed, it is necessary to newly manufacture a mold device having a separate structure in which the shape of the molding cavity is different.

  On the other hand, in recent years, the common use (sharing) of vehicle body platforms has progressed in automobiles, and accordingly, all or part of automobile parts to be attached to such a common platform can be used. There has been a demand for improvement in production efficiency and cost reduction by sharing the whole or a part of an automobile parts manufacturing apparatus.

  However, in the molding device for a pedestrian protection device made of a conventional resin molded body, as described above, when molding the pedestrian protection device, the overall structure is mutually different for each type of vehicle to be attached. Since different and different types are used, it has been extremely difficult to meet the demands for improvement in production efficiency and cost reduction through the common use of manufacturing equipment.

Japanese Patent Application Laid-Open No. 2002-264741

  Here, the present invention has been made in the background of the circumstances as described above, and the problem to be solved is that although the rear part attached to the vehicle has the same shape, the front end part is When multiple types of pedestrian protection devices for vehicles having different shapes are injection-molded, efficient and low-cost molding of these multiple types of pedestrian protection devices for vehicles is realized by realizing the sharing of some structures. It is an object of the present invention to provide a molding die device for a vehicle pedestrian protection device that enables the above.

  The present invention can be suitably implemented in various aspects listed below in order to solve the problems described above or the problems grasped from the description and drawings of the entire specification. Moreover, each aspect described below can be employed in any combination. The aspects or technical features of the present invention are not limited to those described below, and can be recognized based on the description of the entire specification and the inventive concept disclosed in the drawings. Should be understood.

  In the present invention, in order to solve the above-described problems, the front end of the vehicle is formed of a resin molded body that is attached to a lower portion of the front portion of the vehicle so as to extend in the front-rear direction of the vehicle. This is a mold apparatus for injection-molding a vehicle pedestrian protection device configured to pay and protect a leg of a pedestrian that has collided with the front of the vehicle. A plurality of types of first nesting molds having different cavity forming surfaces, which are interchangeably assembled to the first mold, A plurality of types of second nesting molds having different cavity forming surfaces, which are interchangeably assembled to the two molds, and the plurality of types of first nesting molds and the plurality of types of second nesting molds. Each selected from nested types The first nested mold and the second nested mold are combined with each other so that the first nested mold and the second nested mold are combined with each other. A first molded cavity portion that provides a front end side portion of the pedestrian protection device for a vehicle is formed between the non-assembled portion of the first nested mold in the first mold, and A second molding cavity portion that provides a portion excluding the front end side portion of the pedestrian protection device for the vehicle is formed between the non-attached portion of the second nested mold in the second die. And at least one of the first nesting mold and the second nesting mold is replaced with another type of nesting mold, so that only the shape of the first molding cavity portion is obtained. Pedestrian protection for vehicles, characterized in that it can be changed The molding die apparatus of the device, is to its gist.

  According to one of the preferred embodiments of the molding device for a vehicle pedestrian protection device according to the present invention, at least one of the first nesting die and the second nesting die is It is constituted by a divided type divided into a plurality.

  According to one of the advantageous embodiments of the molding device for molding a pedestrian protection device for a vehicle according to the present invention, both the first nesting die and the second nesting die are different types. By changing to the nested mold, only the shape of the first molding cavity portion can be changed.

  Furthermore, according to one of the desirable embodiments of the molding die device for the vehicle pedestrian protection device according to the present invention, the vehicle pedestrian can be obtained by combining the first mold and the second mold. A third molding cavity portion for molding the rib-shaped protrusion provided in the protective device is formed, and a part of the cavity forming surface forming the third molding cavity portion is formed by the first nesting die and the A cavity forming surface including at least one of a boundary line with the first mold and a boundary line between the second nested mold and the second mold, and extending along the boundary line. The When the first mold and the second mold are constituted by a plurality of divided molds, a part of the cavity forming surface forming the third molding cavity portion is divided into the plurality of divided molds. It is constituted by a cavity forming surface including a dividing boundary line between the molds and extending along the dividing boundary line.

  And in this invention, it consists of the resin molding attached in the state arrange | positioned so that it may extend in the front-back direction of a vehicle in the lower part of the front part of a vehicle, The front end part of the pedestrian who collided with the front surface of the vehicle When manufacturing a vehicle pedestrian protection device configured to pay and protect the leg by contacting the leg by injection molding, the first mold and the second mold that are matched to each other A plurality of types of first nesting molds having different cavity forming surfaces which are replaceably assembled to the first mold, and different cavity forming surfaces which are replaceably assembled to the second mold. The first nesting die selected from the plurality of types of first nesting die and the plurality of types of second nesting die using a molding die apparatus having a plurality of types of second nesting die And second entry After the child molds are assembled to the first mold and the second mold, respectively, the first mold and the second mold are combined with each other, and the first nested mold A first molded cavity portion that provides a front end side portion of the vehicle pedestrian protection device is formed between the second nested mold and the first nested mold in the first mold. A second molding cavity portion that provides a portion excluding the front end side portion of the vehicle pedestrian protection device between the attached portion and the non-attached portion of the second nested mold in the second mold A method for manufacturing a pedestrian protection device for a vehicle, which is formed and then injects and fills molten resin into the first molding cavity portion and the second molding cavity portion, is preferably employed.

  That is, in the molding device for a vehicle pedestrian protection device according to the present invention, the first mold and the second mold are simply used while using the first mold and the second mold as they are. The vehicle pedestrian protection apparatus having the same rear-side part shape can be formed by variously changing the nesting type to a different type as appropriate, although the shape of the front-end side part is different. Thereby, in such a molding die device, when molding a plurality of types of pedestrian protection devices for different types of vehicles having front bumpers with different design shapes, the first and second A mold part other than the nested mold can be shared or shared.

  Therefore, if the molding die device according to the present invention is used, for example, the vehicle to which the vehicle pedestrian protection device is to be attached uses a platform in which the mounting part of the pedestrian protection device is shared, although the vehicle type is different. If so, when molding pedestrian protection devices to be attached to vehicles of different types, separate types of molding having different overall structures with molding cavities of different shapes for different types of vehicles. The need to prepare each mold apparatus can be advantageously eliminated.

  Therefore, in the molding die device for a pedestrian protection device for a vehicle according to the present invention as described above, the rear side portion attached to the vehicle has the same shape, but the front end side portions have different shapes. In addition, efficient and low-cost molding of a plurality of types of pedestrian protection devices for vehicles can be advantageously realized by partially sharing the mold structure. As a result, a plurality of types of vehicle pedestrian protection devices to be attached to a plurality of types of vehicles using a common platform can be formed extremely efficiently and at low cost.

It is front explanatory drawing which shows an example of the pedestrian protection apparatus for motor vehicles shape | molded using the molding die apparatus according to this invention. The walking for automobiles formed by using a molding die device obtained by exchanging the insert mold with respect to the molding die device used for molding the automobile pedestrian protection device shown in FIG. It is front explanatory drawing which shows the example of a person protection device. It is a cross-sectional explanatory drawing which shows an example of the shaping die apparatus provided with the structure according to this invention used for shape | molding the pedestrian protection apparatus for motor vehicles shown by FIG. FIG. 3 is a molding die device having a structure according to the present invention, which is used to mold the pedestrian protection device for automobiles shown in FIG. 2, with respect to the molding die device shown in FIG. It is sectional explanatory drawing which shows the molding die apparatus formed by replacing | exchanging a nested mold. It is front explanatory drawing of the stationary mold | type in the molding die apparatus shown by FIG. It is front explanatory drawing of the movable mold | type in the molding die apparatus shown by FIG. It is front explanatory drawing of the fixed mold | type in the molding die apparatus shown by FIG. It is front explanatory drawing of the movable mold | type in the molding die apparatus shown by FIG. It is a figure corresponding to FIG. 6 which shows another example of the shaping die apparatus which has a structure according to this invention. It is a figure corresponding to FIG. 6 which shows another example of the shaping die apparatus which has a structure according to this invention. It is a figure corresponding to FIG. 5 which shows the other example of the shaping die apparatus which has a structure according to this invention. It is a figure corresponding to FIG. 7 which shows the other example of the shaping die apparatus which has a structure according to this invention.

  Hereinafter, in order to clarify the present invention more specifically, the configuration of the present invention will be described in detail with reference to the drawings.

  First, in FIG.1 and FIG.2, the design installed in the front of two types of motor vehicles from which a vehicle type differs as a pedestrian protection apparatus for vehicles shape | molded using the metal mold | die which has a structure according to this invention, respectively. Two examples of the leg-fixing device respectively attached to the inside of the front bumper having different shapes are shown in the front form. As is clear from FIGS. 1 and 2, each of the leg fixing devices 10 and 12 is formed of a resin molded product including the substrates 14 and 16.

  The board 14 of the leg cleaning device 10 has a dimension in a direction corresponding to the vehicle width direction (hereinafter simply referred to as the width direction) in the left-right direction in FIG. 1 is a thin-walled flat plate having a substantially rectangular shape as a whole, which is sufficiently longer than the dimension in the vertical direction in FIG. 1 in the direction corresponding to the longitudinal direction of the automobile (hereinafter simply referred to as the longitudinal direction). It is composed of materials.

  In such a board | substrate 14, the site | part which occupies about half of the back side is made into the attaching part 18 attached to a motor vehicle. A plurality of insertion holes 20 that pass through the mounting portion 18 in the thickness direction and that allow predetermined fixing bolts and the like to be inserted are provided at predetermined intervals in the width direction.

  The front portion of the substrate 14 excluding the mounting portion 18 is an impact input portion 22. At the front end portion of the impact input portion 22, one side (from the following) in the thickness direction of the substrate 14 (direction perpendicular to the paper surface of FIG. 1), which is the upper side in the state in which the leg cleaning device 10 is attached to the automobile, is provided. Is simply formed as a rib-like protrusion 24 that protrudes at a predetermined height and extends continuously over the entire width. The front surface of the wall portion 24 is an impact input surface 26 having a curved surface shape.

  A plurality of reinforcing ribs 28 that are rib-like protrusions are integrally formed on the upper surface of the impact input portion 22 of the substrate 14. The plurality of reinforcing ribs 28 have a thin flat plate shape, and reach the attachment portion 18 from the rear surface opposite to the impact input surface 26 of the flange wall portion 24 toward the rear of the impact input portion 22 (substrate 14). It extends straight without any length. Further, the reinforcing ribs 28 are arranged to face each other at a predetermined interval in the width direction of the impact input portion 22.

  On the other hand, the board 16 of the leg cleaning apparatus 12 shown in FIG. 2 is also substantially horizontally long in which the dimension in the width direction is sufficiently longer than the dimension in the front-rear direction, like the board 14 of the leg cleaning apparatus 10 shown in FIG. It is comprised with the thin flat plate material which exhibits the rectangular whole shape.

  Even in the base plate 16 of the leg cleaning device 12, the rear portion is the attachment portion 30, and a plurality of insertion holes 32 are provided at a predetermined interval in the width direction at the rear end portion. . Further, the front portion excluding the mounting portion 30 is an impact input portion 34, and a front wall portion 38 is provided with an eaves wall portion 38 whose impact input surface 36 has a curved surface at the front end. It is integrally formed so that it may extend continuously. Further, a plurality of reinforcing ribs 40 extending straight from the rear surface of the collar wall portion 38 to the rear side are integrally formed on the upper surface of the impact input portion 34 with the same arrangement form as the arrangement form on the base plate 14 of the leg cleaning device 10. Is formed.

  In such two types of leg wipers 10 and 12, the length in the front-rear direction of the impact input portion 22 of the leg payer 10 is smaller than the length in the front-rear direction of the impact input portion 34 of the leg payer 12. Has been. Further, the extension length of the reinforcing rib 28 integrally formed with the impact input portion 22 is also made smaller than that of the reinforcing rib 40 integrally formed with the impact input portion 34. Further, the impact input surface 26 of the collar wall portion 24 provided in the impact input portion 22 of the leg wiper device 10 is more than the impact input surface 36 of the collar wall portion 38 provided in the impact input portion 34 of the leg wiper device 12. The curved surface has a small radius of curvature.

  That is, in the two types of leg-pasting devices 10 and 12, the shapes of the attachment portions 18 and 30 are the same, and the number, size, and formation position of the insertion holes 20 and 32 are also the same. The shape of the impact input portions 22 and 34 corresponds to the design shape of the front bumper located so as to cover the front end portions of the leg-pasting devices 10 and 12 under the attachment state to two different types of automobiles. The shapes are different from each other.

  Such two types of leg-pasting devices 10 and 12 can be advantageously formed by injection molding using a molding die device 42 having a structure according to the present invention shown in FIGS. 3 and 4. it can.

  As is apparent from FIGS. 3 and 4, the molding die device 42 of the present embodiment includes a fixed mold 44 as a first mold, and a movable mold 46 as a second mold disposed opposite to the fixed mold 44. have. Although not shown, like the conventional mold apparatus, the fixed die 44 is attached to a fixed platen whose position is fixed, and the movable die 46 is disposed so as to be able to approach / separately move with respect to the fixed platen. It is attached to the movable board. As the movable platen moves toward / separates from the fixed platen, the movable die 46 moves toward / separates from the fixed die 44, and mold closing / opening between the movable die 46 and the fixed die 44 is realized. It is like that.

  In addition, recesses 48 and 50 are formed in the opposing surfaces of the fixed mold 44 and the movable mold 46, respectively. The recessed portion 48 of the fixed mold 44 has a stepped shape in which a portion located on the lower side in FIGS. 3 and 4 is a shallow bottom, while a portion located on the upper side is a deep bottom. ing. The shallow portion of the recess 48 is a cavity forming recess 52, while the deep bottom portion is a fixed mold-side receiving recess 54. The cavity forming recess 52 has the entire inner surface as a cavity forming surface 56. And this cavity formation surface 56 has the shape corresponding to the lower surface and both side surfaces of the attachment parts 18 and 30 which were made into the mutually same shape in the said 2 types of leg payment apparatuses 10 and 12 (FIG. 5 and FIG. 5). (See FIG. 7). On the other hand, the recess 50 of the movable mold 46 is configured as a movable mold-side accommodation recess 58 whose entire bottom is deep.

  As shown in FIGS. 3 and 4, the molding die device 42 of the present embodiment includes a fixed mold side first nested mold as a first nested mold in addition to the fixed mold 44 and the movable mold 46. 60 and the fixed type | mold side 2nd nesting type | mold 62 and the movable type | mold side 1st nesting type | mold 64 and the movable type | mold side 2nd nesting type | mold 66 as a 2nd nesting type. The fixed mold side first nesting mold 60 and the fixed mold side second nesting mold 62 can be exchanged for the fixed mold 44 by being selectively fitted and accommodated in the fixed mold side accommodation recess 54. Can be assembled to. On the other hand, the movable mold side first nesting mold 64 and the movable mold side second nesting mold 66 can be exchanged for the movable mold 46 by being selectively fitted and accommodated in the movable mold side accommodation recess 58. Can be assembled to.

  As apparent from FIGS. 3 and 5, the fixed mold side first nested mold 60 is exposed to the outside in a state of being accommodated in the fixed mold side accommodating recess 54, and the movable mold 46 of the fixed mold 44. A cavity forming recess 68 is formed on a surface that is flush with the mold matching surface (opposing surface). The cavity forming recess 68 has the entire inner surface as a cavity forming surface 70. The cavity forming surface 70 has a shape corresponding to the lower surface and both side surfaces of the impact input unit 22 in the leg cleaning device 10.

  3 and 6, the movable mold side first nested mold 64 is exposed to the outside in a state of being accommodated in the movable mold side accommodating recess 58, and is fixed to the movable mold 46. A cavity forming recess 72 is formed on a surface that is flush with the die-matching surface (opposing surface) 44. The cavity forming recess 72 includes a flange wall forming recess 76 having a shape corresponding to each outer surface shape of the flange wall 24 and the reinforcing rib 28 formed in the impact input portion 22, and a plurality of reinforcing rib forming recesses 78. It consists of The entire inner surface of the cavity forming recess 72 is a cavity forming surface 74.

  On the other hand, as is clear from FIGS. 4 and 7, the fixed mold side second nested mold 62 is exposed to the outside in a state of being housed in the fixed mold side housing recess 54, so that the movable mold of the fixed mold 44 is movable. A cavity forming recess 80 is formed on a surface that is flush with the mold matching surface (opposing surface) 46. The cavity forming recess 80 has the entire inner surface as a cavity forming surface 82. The cavity forming surface 82 has a shape corresponding to the lower surface and both side surfaces of the impact input portion 34 of the leg cleaning device 12 having a shape different from that of the impact input portion 22 of the leg cleaning device 10.

  4 and 8, the movable mold side second nested mold 66 is exposed to the outside in a state of being accommodated in the movable mold side accommodating recess 58, and is fixed to the fixed mold 44 of the movable mold 46. A cavity forming recess 84 is formed on a surface that is flush with the die-matching surface (facing surface). The cavity forming recess 84 includes a flange wall portion 38 formed in the impact input portion 34, a flange wall forming recess 88 having a shape corresponding to each outer surface shape of the reinforcing rib 40, and a plurality of reinforcing rib forming recesses 90. It consists of The entire inner surface of the cavity forming recess 72 is a cavity forming surface 86.

  As shown in FIGS. 3 and 4, in the molding die device 42 of the present embodiment, the combination of the fixed mold side first nesting mold 60 and the movable mold side first nesting mold 64, and the fixed mold Each of the nesting molds 60, 62, 64, 66 is used by a combination of the second side nesting mold 62 and the movable second nesting mold 66. That is, when the fixed mold side first nested mold 60 is accommodated in the fixed mold side accommodating recess 54 and assembled to the fixed mold 44, the movable mold side first nested mold 64 is in the movable mold side accommodating recess 58. And can be assembled to the movable mold 46. On the other hand, when the fixed mold side second nested mold 62 is accommodated in the fixed mold side accommodating recess 54 and assembled to the fixed mold 44, the movable mold side second nested mold 66 is in the movable mold side accommodating recess 58. And is assembled to the movable mold 46.

  Thus, in the molding die apparatus 42, as shown in FIG. 3, the fixed mold side first nested mold 60 and the movable mold side first nested mold 64 are assembled to the fixed mold 44 and the movable mold 46, respectively. Under the condition, when the fixed mold 44 and the movable mold 46 are closed (mold matching), the cavity forming recess 52 of the fixed mold 44 is part of the mold matching surface of the movable mold 46 with the fixed mold 44. And the cavity forming recess 68 of the fixed mold side first nesting die 60 and the cavity forming recess 72 of the movable mold side first nesting die 64 are placed in corresponding positions so as to cover the respective openings. It is like that.

  Accordingly, the leg washer 10 is disposed between the non-assembled portion of the fixed mold side first nested die 60 in the fixed die 44 and the non-assembled portion of the movable mold side first nested die 64 in the movable die 46. The mounting portion molding cavity portion 92 as a second molding cavity portion having a shape corresponding to the mounting portion 18 is a cavity forming surface 56 of the cavity forming recess 52 and a mold of the movable mold 46 that covers the cavity forming recess 52. It is formed by being surrounded by the mating surface portion.

  In addition, an impact input as a first molding cavity portion having a shape corresponding to the impact input portion 22 of the leg cleaning device 10 between the fixed mold side first insert mold 60 and the movable mold side first insert mold 64. The part molding cavity portion 94 is surrounded by the cavity forming surfaces 70 and 74 of the cavity forming recesses 68 and 72 of the fixed mold side first nesting die 60 and the movable die side first nesting die 64, and the mounting part molding cavity portion. It is formed in a state communicating with 92. Further, a third molding cavity portion having a shape corresponding to the wall 24 and the plurality of reinforcing ribs 28 is provided between the fixed mold side first nesting mold 60 and the movable mold side first nesting mold 64. The flange wall forming cavity portion 91 and the rib forming cavity portion 93 are surrounded by the inner surfaces of the flange wall forming recess 76 and the plurality of reinforcing rib forming recesses 78 and communicated with the impact input portion forming cavity portion 94. In the state, it is formed.

  As shown in FIG. 4, in the molding die device 42, the fixed mold side second nested mold 62 and the movable mold side second nested mold 66 are assembled to the fixed mold 44 and the movable mold 46, respectively. Below, even when the fixed mold 44 and the movable mold 46 are closed (matching), the non-assembled portion of the fixed mold side second nested mold 62 in the fixed mold 44 and the movable mold side in the movable mold 46 A second molding cavity portion having a shape corresponding to the mounting portion 30 of the leg-pasting device 12 having the same shape as the mounting portion 18 of the leg-pasting device 10 between the non-assembled portion of the second nesting die 66 An attachment portion forming cavity portion 92 is formed.

  When the fixed mold 44 and the movable mold 46 are combined, the cavity forming concave portion 80 of the fixed mold side second nested mold 62 and the cavity forming concave portion 84 of the movable mold side second nested mold 66 are respectively opened. So that the cover is covered. Thereby, the impact input part 34 of the leg-pasting device 12 which is different in shape from the impact input part 22 of the leg-pasting device 10 between the fixed mold-side second nesting die 62 and the movable-type second nesting die 66. The impact input portion molding cavity portion 98 as the first molding cavity portion having a shape corresponding to the shape of the cavity forming recesses 80 and 84 of the fixed mold side second nesting die 62 and the movable die side second nesting die 66 is provided. It is formed so as to be surrounded by the cavity forming surfaces 82 and 86 and communicated with the mounting portion forming cavity portion 92.

  In addition, between the fixed mold side second nesting mold 62 and the movable mold side second nesting mold 66, a third molding cavity portion having a shape corresponding to the flange wall portion 38 and the plurality of reinforcing ribs 40 is provided. A state in which the flange wall forming cavity portion 95 and the rib forming cavity portion 96 are surrounded by inner surfaces of the flange wall forming concave portion 88 and the plurality of reinforcing rib forming concave portions 90 and communicated with the impact input portion forming cavity portion 98. It is designed to be formed. 3 to 5 and 7, reference numeral 100 denotes an insertion hole forming pin for forming the insertion holes 20 and 32 provided in the mounting portions 18 and 30 of the leg cleaning devices 10 and 12.

  Then, when molding the two types of leg-pasting devices 10 and 12 having different shapes of the impact input portions 22 and 34 using the molding die device 42 of the present embodiment having such a structure, For example, the work is performed as follows.

  That is, when molding one of the two types of leg-pasting devices 10, 12, first, the former from the fixed mold-side first nesting die 60 and the fixed mold-side second nesting die 62. On the other hand, the former is selected from the movable side first nested mold 64 and the movable side second nested mold 66. Then, as shown in FIG. 3, the selected fixed mold side first nesting mold 60 and movable mold side first nesting mold 64 are placed in the fixed mold side receiving recess 54 and the movable mold side receiving recess 58. And is assembled to the fixed mold 44 and the movable mold 46, respectively. Next, the fixed mold 44 and the movable mold 46 are closed, and the mounting part molding cavity part 92, the impact input part molding cavity part 94, the flange wall molding cavity part 91, and the rib molding cavity part 93 are interposed therebetween. Are formed in communication with each other.

  After that, although not shown, a predetermined resin material is melted in the mounting portion molding cavity portion 92, the impact input portion molding cavity portion 94, the rib wall portion molding cavity portion 91, and the rib molding cavity portion 93. Injection and filling in the state. Then, after solidifying it to obtain a resin molded product, the resin molded product is released. In this way, the leg washer 10 made of a resin molded product having the structure shown in FIG. 1 is obtained.

  When another type of legging device 12 is molded using the molding die device 42 in which the legging device 10 is molded, first, the fixed mold side first nesting mold is formed from the fixed mold side accommodation recess 54. On the other hand, the movable mold side first nested mold 64 is detached from the movable mold side accommodation recess 58 while the 60 is detached. Thereafter, as shown in FIG. 4, instead of the fixed mold side first nested mold 60, the fixed mold side second nested mold 62 is fitted into the fixed mold side receiving recess 54, thereby fixing the fixed mold side second nested mold 60. The mold 62 is assembled to the fixed mold 44. Further, instead of the movable side first nesting die 64, the movable side second nesting die 66 is fitted into the movable side accommodating recess 58 so that the movable side second nesting die 68 is assembled to the movable die 46. .

  Next, the fixed mold 44 and the movable mold 46 are closed, and an attachment part molding cavity part 92, an impact input part molding cavity part 98, a wall part molding cavity part 95, and a rib molding cavity part 96 are interposed therebetween. Are formed in communication with each other.

  Thereafter, although not shown, a predetermined resin material is melted in the mounting portion molding cavity portion 92, the impact input portion molding cavity portion 98, the rib wall portion molding cavity portion 95, and the rib molding cavity portion 96. Injection and filling in the state. Then, after solidifying it to obtain a resin molded product, the resin molded product is released. In this way, the leg washer 12 made of a resin molded product having the structure as shown in FIG. 2 is obtained.

  As described above, in the molding die device 42 of the present embodiment, the fixed mold 44 and the movable mold 46 are used as they are, and are simply accommodated in the fixed mold side accommodating recess 54 and the movable mold side accommodating recess 58. Two types of legs in which the shapes of the impact input portions 22 and 34 are different from each other, but the shapes of the mounting portions 18 and 30 are the same, only by exchanging the nested molds 60, 62, 64, and 66 in a predetermined combination. The payment devices 10 and 12 can be formed. In other words, in the molding die device 42, the shape of the attachment portions 18 and 30 is the same, but when the two types of leg washer devices 10 and 12 that are different from each other only in the shape of the impact input portions 22 and 34 are formed. The fixed mold 44 and the movable mold 46 except for the nested molds 60, 62, 64 and 66 to be assembled to the fixed mold 44 and the movable mold 46 can be advantageously shared.

  Therefore, when the molding die device 42 of this embodiment is used, for example, a common platform (a structure or a portion where the mounting portions 18 and 30 of the leg fixing devices 10 and 12 are to be attached is the same). When forming the leg holders 10 and 12 to be attached to two types of automobiles using different types of vehicles, the nesting molds 60, 62, 64 and 66 corresponding to the respective types of vehicles are simply prepared. It is not necessary to prepare two types of molding dies having different overall structures and having molding cavities of different shapes.

  Therefore, in the molding die device 42 of this embodiment as described above, two types of leg-pasting devices 10 and 12 to be attached to a plurality of types of automobiles using a common platform can be efficiently molded. Moreover, the molding cost can be reduced extremely effectively.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention is not limited by the above description.

  For example, at least one of the stationary mold side first and second nesting molds 60 and 62 and the movable mold side first and second nesting molds 64 and 66 may be configured as a divided mold divided into a plurality of parts. good. As a result, for example, when each of the nested molds 60, 62, 64, 66 is replaced, one of the light weight divided molds can be replaced one by one, so that each of the nested molds 60, 62, 64, 66 can be replaced. The burden on the worker in the work can be advantageously reduced.

Further, for example, when the movable first side nested mold 64 is configured by a plurality of divided molds, as shown in FIG. 9, the dividing boundary line 104 of the plurality of divided molds 102.
Extending along the length direction (extending direction of the reinforcing rib 28 formed in the rib forming cavity portion 93) on the bottom surface of the reinforcing rib forming recess 78 forming the rib forming cavity portion 93, It is desirable that a plurality of split molds 102 be assembled. As a result, during injection and filling of the molten resin into the impact input part molding cavity part 94 and the rib molding cavity part 93, the air in the narrow rib molding cavity part 93 is separated between the split surfaces of the plurality of split molds 102. In the meantime, the rib forming cavity portion 93 is escaped from the gap. As a result, it is possible to effectively eliminate various molding defects caused by the air pocket generated in the rib molding cavity portion 93.

  Further, for example, when the movable mold side first nesting die 64 is constituted by a plurality of divided molds, as shown in FIG. The bottom surface of the ridge wall portion forming recess 76 that forms the portion 91 extends along the length direction thereof (the extending direction of the ridge wall portion 24 formed in the ridge wall portion forming cavity portion 91). The split mold 102 is preferably assembled. As a result, it is possible to effectively eliminate the occurrence of various molding defects due to the air pocket generated in the flange wall molding cavity portion 91.

  Furthermore, although not shown, for example, the boundary line between the movable mold 46 and the movable mold side first and second nesting molds 64 and 66 forms, for example, the ridge wall forming cavity portions 91 and 95. It is movable on the bottom surface of the wall forming recesses 76 and 88 so as to extend along the length direction thereof (extending direction of the wall portions 24 and 38 formed in the wall portion forming cavities 91 and 95). It is desirable that the mold side first and second nesting molds 64 and 66 are assembled to the movable mold 46. Also by this, it is possible to effectively eliminate the occurrence of various molding defects due to the air pool generated in the flange wall molding cavity portions 91 and 95.

  Further, when attachment pieces having different shapes from each other are provided on the side portions of the attachment portions 18 and 30 of the two types of leg payment devices 10 and 12, respectively, for example, as shown in FIGS. As shown in the figure, mounting-piece forming nest-type receiving recesses 106 and 106 are formed on both sides of the cavity forming recess 52 of the movable die 44, respectively. Then, the mounting piece forming nested molds 110, 110 provided with the cavity forming recessed portions 108, 108 having different shapes in the mounting piece forming nested mold receiving recesses 106, 106 are assembled in an exchangeable manner. Also good. As a result, the two types of leg-pasting devices 10 and 12 in which mounting pieces having different shapes project from the side portions of the mounting portions 18 and 30 can be formed easily and at low cost.

  Furthermore, the first mold and the second mold may have a structure that can move toward and away from each other.

  In addition, even when the first mold and the second mold are configured by the fixed mold 44 and the movable mold 46, unlike the above-described embodiment, It is also possible to constitute the first mold with the movable mold 46 as well as the mold.

  Furthermore, in the said embodiment, the 1st nesting type | mold and the 2nd nesting type | mold were equipped with the cavity formation surface 70,74,82,86 from which a shape mutually differs, and fixed mold | type side 1st and 2nd nesting type | mold 60 , 62 and the movable mold side first and second nesting molds 64, 66, respectively, but the first and second nesting molds have three different cavity surfaces. Of course, it is also possible to constitute with the above.

  In addition, although the overall outer shape of the front end side portion is the same, a plurality of different shapes differ only in any one of the upper and lower surfaces by providing ribs, concave grooves, etc. on the upper and lower surfaces. When molding a type of vehicle pedestrian protection device, only one of the first nesting mold and the second nesting mold needs to be replaced.

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10,12 Leg wiping device 14,16 Board | substrate 18,30 Attachment part 22 34 Impact input part 24,38 Reed wall part 28,40 Reinforcement rib 42 Mold apparatus 44 Molding type 46 Movable type 56,70,74,82 , 86 Cavity forming surface 60 Fixed mold side first nesting mold 62 Fixed mold side second nesting mold 64 Movable mold side first nesting mold 66 Movable mold side second nesting mold 92 Mounting part molding cavity part 94, 98 Impact input part molding Cavity part

Claims (2)

It consists of a resin molded body that is attached to the lower part of the front part of the vehicle so as to extend in the front-rear direction of the vehicle, and at its front end, it contacts the leg of the pedestrian that collided with the front of the vehicle A mold apparatus for injection molding a pedestrian protection device for a vehicle configured to pay and protect the legs,
A first mold and a second mold that are matched to each other; a plurality of types of first nesting molds that are interchangeably assembled to the first mold and have different cavity forming surfaces; and the second mold A plurality of types of second nesting molds having different cavity forming surfaces, which are exchangeably assembled to the molds,
The first mold formed by assembling the first nested mold and the second nested mold respectively selected from the plurality of types of first nested molds and the plurality of types of second nested molds; A first molding cavity that provides a front end side portion of the pedestrian protection device for a vehicle between the first nesting die and the second nesting die by matching the second die with each other. A portion is formed, the vehicle between the first nested non-assembled portion of the first mold and the second nested non-assembled portion of the second mold A second molded cavity portion that provides a portion excluding the front end side portion of the pedestrian protection device for use is formed,
By replacing at least one of the first nesting mold and the second nesting mold with another type of nesting mold, only the shape of the first molding cavity portion can be changed. A molding die device for a vehicle pedestrian protection device, characterized in that   The molding of the pedestrian protection device for a vehicle according to claim 1, wherein at least one of the first nesting mold and the second nesting mold is constituted by a divided mold divided into a plurality of parts. Mold equipment.

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