JP5817691B2 - Injection molding apparatus and injection molding method using the same - Google Patents

Description

  The present invention relates to an injection molding apparatus and an injection molding method using the same, and more specifically, when a resin molded product is injection-molded on a part of the surface of a base material, the punching of the base material and the injection of the resin are performed 1 The present invention relates to an injection molding apparatus that can be efficiently performed by a stand apparatus and an injection molding method using the same.

  Conventionally, as disclosed in Patent Documents 1 and 2, for example, when a clip seat is injection-molded on the back surface of an automobile interior ceiling product, the ceiling base material is perforated and the injected resin flows into the hole. There is known a technique for obtaining an anchor effect. However, these Patent Documents 1 and 2 disclose a technique for partially injecting, but do not disclose a detailed technique for drilling. Also, as disclosed in Patent Document 3, an apparatus for drilling a ceiling base material in a ceiling interior product of an automobile is also known. However, in this patent document 3, resin injection cannot be performed with a drilling device.

  Patent Document 4 discloses an apparatus having both a punching function and a resin injection function when molding a door trim of an automobile. However, the device of Patent Document 4 is a large device that molds the door trim body itself, and cannot be applied to the case where the clip seat as in Patent Documents 1 to 3 is formed on a base material. Even if it is applied, drilling and resin injection cannot be efficiently performed with one apparatus.

JP-A-2-48244 JP-A-2-265718 JP-A-11-170924 Japanese Patent Laid-Open No. 10-337741

  The present invention has been made in view of the above-described situation. When a resin molded product is injection-molded on a part of the surface of the base material, the drilling of the base material and the injection of the resin can be efficiently performed with a single device. It is an object of the present invention to provide an injection molding apparatus that can perform well and an injection molding method using the same.

In order to solve the above problem, the invention described in claim 1 is an injection molding apparatus for injection molding a resin molded product on a part of a surface of a base material, and a shaft end surface is placed on the surface of the base material. A cylindrical mold that forms an injection region therein, a drilling member that is movably provided between the injection position and the drilling position within the cylindrical mold, and the drilling member toward the injection position. An urging means for urging and an injection means for injecting molten resin to the piercing member, and the piercing member is pierced from the injection position against the urging force of the urging means. A molten resin that is injected from the injection means in a state where a hole is drilled in the substrate by moving to a position and the punching member is returned to the injection position by the urging force of the urging means Is injected into the injection region through the punching member and That.
According to a second aspect of the present invention, in the first aspect, the perforating member moves between the injection position and the perforated position in sliding contact with an inner peripheral surface of the cylindrical mold, Is formed between the perforating member located at the injection position, the cylindrical shape, and the base material.
The invention according to claim 3 is attached to the inside of the cylindrical mold according to claim 1, and partitions the inside of the cylindrical mold in the axial direction so that the injection region is formed between the cylindrical mold and the base material. An injection member to be formed, and the injection member is provided with an insertion hole through which a punching needle provided in the punching member is inserted, and the punching needle is located when the punching member is located at the injection position. Is summarized in the insertion hole.
Invention of Claim 4 is an injection molding method using the injection molding apparatus as described in any one of Claims 1 thru | or 3, Comprising: The axial end surface of the said cylinder shape is mounted in the surface of the said base material. A step of moving the punching member from the injection position to the punching position against the biasing force of the biasing means to form a hole in the base material; and a biasing force of the biasing means And the step of injecting molten resin injected from the injection means into the injection region through the punching member in a state where the punching member is returned to the injection position.

According to the injection molding apparatus of the present invention, an injection molding apparatus for injection molding a resin molded product on a part of the surface of a base material, the shaft end face is placed on the surface of the base material to form an injection region inside A cylindrical mold, a drilling member provided to be movable between an injection position and a drilling position inside the cylindrical mold, a biasing means for biasing the drilling member toward the injection position, and a drilling member. An injection means for injecting a molten resin, and a hole is formed in the base material by moving the drilling member from the injection position to the drilling position against the biasing force of the biasing means, In the state where the punching member is returned to the injection position by the biasing force of the biasing means, the molten resin injected from the injection means is injected into the injection region through the punching member, so that the molten resin injected into the injection region Part of the resin flows into the hole formed in the base material and is firmly bonded to the base material. Resin molded article is obtained. Thereby, when the resin molded product is injection-molded on a part of the surface of the base material, the drilling of the base material and the injection of the resin can be efficiently performed with one apparatus. Furthermore, the apparatus can be made compact.
The punching member is slidably contacted with the inner peripheral surface of the cylindrical mold and moves between the injection position and the drilling position, and the injection region is located at the injection position. When it is formed between the cylindrical mold and the base material, the molding die is constituted by a drilling member having a drilling function, so that the apparatus can be further downsized.
Further, the injection member is attached to the inside of the cylindrical mold, and includes an injection member that partitions the inside of the cylindrical mold in the axial direction to form the injection region between the cylindrical mold and the base material. When an insertion hole through which a drilling needle provided in the drilling member is inserted is provided, and the drilling needle is stored in the insertion hole when the drilling member is located at the injection position, resin molding is performed. It is difficult to form a hole mark by a drilling needle on the surface side of the product, and the design of the resin molded product can be improved.
According to the injection molding method of the present invention, the step of placing the cylindrical shaft end face on the surface of the substrate, and the punching member is moved from the injection position to the drilling position against the biasing force of the biasing means. With the step of drilling holes in the base material and the punching member returned to the injection position by the biasing force of the biasing means, the molten resin injected from the injection means is injected into the injection region via the punching member. A part of the molten resin injected into the injection region flows into a hole formed in the base material, and a resin molded product firmly bonded to the base material is obtained. Thereby, when the resin molded product is injection-molded on a part of the surface of the base material, the drilling of the base material and the injection of the resin can be efficiently performed with one apparatus.

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.
1 is a side view of an injection molding apparatus according to Embodiment 1. FIG. It is the II-II sectional view taken on the line of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. FIG. 3 is an exploded perspective view of a punching member and a cylindrical shape according to the first embodiment. FIG. 5 is a view taken in the direction of arrow V in FIG. 4. It is operation | movement explanatory drawing of the support structure which concerns on Example 1, (a) shows the state in which the drilling member was located in the injection position, (b) shows the state in which the drilling member was located in the drilling position. It is operation | movement explanatory drawing of the said injection molding apparatus, (a) shows the state which set the cylinder shape to the base material, (b) shows the state which drilled the hole with the drilling member, (c) shows drilling. The member is returned to the injection position. It is operation | movement explanatory drawing of the said injection molding apparatus, (a) shows the state which inject | poured molten resin into the injection area | region, (b) shows the state which removed the cylinder shape from the base material. It is a disassembled perspective view of the injection molding apparatus which concerns on Example 2. FIG. It is operation | movement explanatory drawing of the said injection molding apparatus, (a) shows the state which set the cylinder shape to the base material, (b) shows the state which drilled the hole with the drilling member, (c) shows drilling. The member is returned to the injection position. It is operation | movement explanatory drawing of the said injection molding apparatus, (a) shows the state which injected | thrown-in the resin pellet in the cylinder shape, (b) shows the state which inject | poured molten resin into the injection area | region, (c) is a base material The state which removed the cylinder shape from is shown. 6 is an exploded perspective view of an injection molding apparatus according to Embodiment 3. FIG. It is operation | movement explanatory drawing of the said injection molding apparatus, (a) shows the state which set the cylinder shape to the base material, (b) shows the state which drilled the hole with the drilling member, (c) shows drilling. The member is returned to the injection position. It is operation | movement explanatory drawing of the said injection molding apparatus, (a) shows the state which injected | thrown-in the resin pellet in the cylinder shape, (b) shows the state which inject | poured molten resin into the injection area | region, (c) is a base material The state which removed the cylinder shape from is shown. It is explanatory drawing for demonstrating the injection molding apparatus of another form.

  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. Injection molding apparatus Embodiment 1 The injection molding apparatus according to the present invention is an injection molding apparatus (1, 31, 61) for injection molding a resin molded product (3, 33) on a part of the surface of a base material (2, 32), and the surface of the base material Can be moved between the injection position (P) and the drilling position (Q) inside the cylinder mold (5, 35) on which the shaft end face is placed to form the injection area (S) inside Drilling members (6, 36) provided on the punching member, urging means (15, 45) for urging the drilling member toward the injection position, and injection means (7) for injecting molten resin to the drilling member 37), the hole (h) is formed in the base member by moving the drilling member from the injection position to the drilling position against the biasing force of the biasing means, and the biasing means In the state where the punching member is returned to the injection position by the biasing force, the molten resin injected from the injection means is injected through the punching member. Characterized in that it is injected (e.g., see Figure 3, 9 and 12, etc. Figure 1).

  The “injection region” means a space in which a molten resin is injected and a resin molded product is injection-molded. Further, the injection position and the drilling position are usually set with the phase shifted in the axial direction of the cylinder.

  Embodiment 1 As the injection molding apparatus according to the present invention, for example, the perforating members (6, 36) are in sliding contact with the inner peripheral surface of the cylindrical mold (5, 35) to form an injection position (P) and a perforation position (Q). The injection region (S) is formed between the punching member, the cylinder, and the base material located at the injection position (see, for example, FIGS. 7C and 10C). ).

  Embodiment 1 As the injection molding apparatus according to the present invention, for example, the injection is attached to the inside of the cylindrical mold (35) and partitions the inside of the cylindrical mold in the axial direction to form an injection region (S) between the cylindrical mold and the base material. A member (63) is provided, and the injection member is provided with an insertion hole (67) through which a drill needle (42) provided in the drilling member is inserted, and is drilled when the drilling member is located at the injection position. The form (for example, see FIGS. 12-14 etc.) in which a needle | hook is accommodated in an insertion hole can be mentioned.

2. Injection molding method Embodiment 2 The injection molding method according to the first embodiment is the same as in the first embodiment. An injection molding method using the injection molding apparatus according to claim 1, wherein the cylindrical shaft end surface is placed on the surface of the substrate, and the punching member is punched from the injection position against the biasing force of the biasing means. A step of drilling a hole in the substrate by moving to a position, and in a state where the punching member is returned to the injection position by the biasing force of the biasing unit, the molten resin injected from the injection unit is passed through the punching member. And injecting into the injection region.

  Hereinafter, the present invention will be specifically described with reference to Examples 1 to 3 with reference to the drawings.

<Example 1>
(1) Configuration of Injection Molding Apparatus An injection molding apparatus 1 according to the present embodiment has a resin molded product 3 (for example, a clip, a bracket, etc.) on a part of the surface of the substrate 2 as shown in FIGS. 8B) is injection-molded. The injection molding apparatus 1 includes a cylindrical mold 5, a punching member 6, a spring 15 (illustrated as “biasing means” according to the present invention) and an injection cylinder 7 (“injecting means” according to the present invention) described below. It is illustrated.) In addition, the said base material 2 is equipped with the fiber layer 2a and the non-breathable air-permeable sheet layer 2b laminated | stacked on the surface of this fiber layer 2a, and is used as a ceiling base material for vehicles. .

  The cylindrical mold 5 is formed in a cylindrical shape, and the shaft end surface is placed on the surface of the base material 2 placed on the placing table 8 to form the injection region S (see FIG. 7C) inside. . Further, the drilling member 6 is movable between the injection position P (see FIG. 6A) along the axial direction and the drilling position Q (see FIG. 6B) inside the cylindrical mold 5. Is provided. The spring 15 urges the drilling member 6 toward the injection position P. Further, the injection cylinder 7 injects molten resin to the drilling member 6 located at the injection position P.

  As shown in FIGS. 4 and 5, the drilling member 6 includes a columnar main body 10, and a plurality of (two in the figure) rod-shaped protrusions 11 extending in the centrifugal direction from the outer peripheral side of the main body 10, It has. The main body 10 has an outer peripheral surface that is in sliding contact with the inner peripheral surface of the cylindrical mold 5. The injection region S is formed between the punching member 6, the cylindrical mold 5 and the base material 2 located at the injection position P (see FIG. 7C). In addition, a large number of drilling needles 12 that pierce the base material 2 are provided on the shaft end surface of the main body 10 in the axial direction. Furthermore, a concave portion 13 into which an injection port described later of the injection cylinder 7 enters is formed on the center side of the main body 10. An injection passage 14 connected to the injection region S is formed on the center side of the recess 13 so as to penetrate in the axial direction.

  Here, between the cylindrical mold 5 and the drilling member 6, as shown in FIG. 6, the drilling member 6 is movable between the injection position P and the drilling position Q with respect to the cylindrical mold 5. A supporting structure 16 for supporting is provided. The support structure 16 includes a protrusion 11 provided on the drilling member 6 and a guide groove 17 that is formed in the cylindrical mold 5 and guides the protrusion 11. The guide groove 17 extends in the axial direction of the cylindrical mold 5, and guides the protrusion 11 to move the drilling member 6 in the axial direction of the cylindrical mold 5.

  The punching member 6 is located at the injection position P with the projection 11 guided to the upper end side of the guide groove 17, and is drilled with the projection 11 guided to the lower end side of the guide groove 17. Located at position Q. Note that one end side of the lateral groove 17a is connected to the upper end side of the guide groove 17, and the other end side of the lateral groove 17a is open to the upper end side of the cylindrical mold 5 so that the drilling member 6 can be inserted. The lower end side of is connected.

  As shown in FIG. 3, the spring 15 is disposed between the lower surface of the projection 11 of the drilling member 6 and the lower end surface of the guide groove 17. Then, by moving the drilling member 6 from the injection position P to the drilling position Q against the biasing force of the spring 15, a hole is formed in the base material 2. On the other hand, after drilling, the drilling member 6 is automatically returned to the injection position P by the biasing force of the spring 15.

  As shown in FIGS. 1 and 2, the protruding portion 11 protrudes outside the cylindrical mold 5 through a guide groove 17. One end side of the first operating lever 18 is swingably supported on the lower end side of the support column 9 erected on the mounting table 8. A locking member 19 having a hook portion 19 a that can be locked to the protrusion 11 is pivotally supported at an intermediate portion in the longitudinal direction of the first operation lever 18. Then, the protrusion 11 locked to the hook portion 19a is guided by the guide groove 17 by the swing operation of the first operation lever 18, and the drilling member 6 is moved from the injection position P to the drilling position Q. Note that the cylindrical mold 5 is moved close to (placed on) and separated from the base material 2 by the swing operation of the first operation lever 18.

  As shown in FIG. 3, the injection cylinder 7 includes a cylindrical body 22 having an injection port 21 on one end side. The cylindrical body 22 has an insertion port 23 into which resin pellets (for example, thermoplastic resin such as polypropylene) are charged. A band-shaped heater 24 is wound around the outer periphery of the cylindrical body 22 to heat the resin pellets introduced into the inside through the insertion port 23. In addition, a piston 25 is provided inside the cylindrical body 22 so as to be movable in the axial direction. The piston 25 presses the molten resin charged into the cylindrical body 22 and heated by the heater 24 toward the injection port 21. In addition, the said heater 24 heats 200-220 degreeC as a standard, when a resin pellet is a polypropylene.

  As shown in FIGS. 1 and 2, one end side of the second operation lever 27 is swingably supported on the upper end side of the support column 9. The upper end side of the connecting rod 28 connected to the piston 25 is pivotally supported at the longitudinal intermediate portion of the second operation lever 27. Then, the piston 25 slides in the cylindrical body 22 in the axial direction by the swing operation of the second operation lever 27. Further, when the second operation lever 27 is swung to the upper end, the injection cylinder 7 is lifted with respect to the cylindrical mold 5 by the engagement of the piston 25 and the cylindrical body 22, and the injection port 21 is recessed in the drilling member 6. Escape from 13 upwards.

(2) Operation of Injection Molding Device Next, the operation of the injection molding device 1 having the above configuration will be described. As shown in FIG. 7A, the shaft end surface of the cylindrical mold 5 is placed on the surface of the substrate 2. At this time, the drilling member 6 is located at the injection position P with respect to the cylindrical mold 5. Next, as shown in FIG. 7B, when the drilling member 6 is moved to the drilling position Q against the biasing force of the spring 15 by the operation of the first operating lever 18, the surface side of the substrate 2 A number of holes h are drilled by the drilling needle 12. Next, as shown in FIG. 7C, when the punching member 6 is returned to the injection position P by the biasing force of the spring 15, the injection region S is formed between the punching member 6, the cylindrical mold 5, and the base material 2. It is formed. The injection port 21 of the injection cylinder 7 is disposed in the concave portion 13 of the drilling member 6, and the resin pellets introduced into the cylindrical body 22 are heated and melted by the heater 24.

  Thereafter, as shown in FIG. 8A, the molten resin in the cylindrical body 22 is injected from the injection port 21 by the pressing of the piston 25 by the operation of the second operation lever 27, and the molten resin is injected from the punching member 6. It is injected into the injection region S through the passage 14. Next, as shown in FIG. 8 (b), by removing the cylindrical mold 5 from the base material 2, the base material 2 in which the resin molded product 3 is injection-molded on a part of the surface is obtained.

(3) Effects of Example As described above, according to the injection molding apparatus 1 of the present example, the cylindrical mold 5 in which the shaft end surface is placed on the surface of the substrate 2 to form the injection region S, and the cylindrical mold 5 A punching member 6 movably provided between the injection position P and the punching position Q, a spring 15 for urging the punching member 6 toward the injection position P, and the punching member 6 An injection cylinder 7 for injecting molten resin, and the hole is formed in the base member 2 by moving the drilling member 6 from the injection position P to the drilling position Q against the biasing force of the biasing means 15. The molten resin injected from the injection cylinder 7 is injected into the injection region S through the punching member 6 in a state where the punching member 6 is returned to the injection position P by the biasing force of the biasing means 15. Therefore, a part of the molten resin injected into the injection region S flows into the hole h formed in the base material 2 Thus, the resin molded product 3 firmly bonded to the substrate 2 is obtained. Thereby, when the resin molded product 3 is injection-molded on a part of the surface of the base material 2, drilling of the base material 2 and injection of the resin can be efficiently performed with one apparatus. Furthermore, the apparatus can be made compact.

  Further, in the present embodiment, the punching member 6 is in sliding contact with the inner peripheral surface of the cylindrical mold 5 and moves between the injection position P and the punching position Q, and the injection region S is located at the injection position P. Since it is formed between the punching member 6, the cylindrical mold 5 and the base material 2, a molding die is constituted by the punching member 6 having a punching function. Therefore, further downsizing of the apparatus can be achieved.

  In the present embodiment, the protrusion 11 provided on the drilling member 6 protrudes outside the cylindrical mold 5 through the guide groove 17 provided on the cylindrical mold 5, so that the protrusion 11 is operated. Thus, the drilling member 6 can be manually moved from the injection position P to the drilling position Q. On the other hand, if the drilling member is moved by driving means such as a cylinder or a motor, the equipment cost is high.

  Further, in this embodiment, as the injection means, a cylindrical body 22 having an injection port 21 on one end side, a heater 24 for heating the inside of the cylindrical body 22, and an axial movement within the cylindrical body 22 are provided. In addition, since the injection cylinder 7 including the piston 25 that presses the molten resin charged into the cylindrical body 22 and heated by the heater toward the injection port 21 is employed, the molten resin is effectively injected into the injection region S. can do. Furthermore, it is not necessary to provide a material tank or hopper as the injection means, and the apparatus can be further downsized.

  In the present embodiment, the piston 25 is slid in the cylindrical body 22 by the operation of the second operating lever 27 and the molten resin is injected from the injection cylinder 7. Therefore, the molten resin can be injected manually. it can. On the other hand, equipment that injects molten resin with a driving means such as a cylinder or a motor has a high equipment cost.

  Furthermore, in this embodiment, the base material 2 includes a fiber layer 2a and a non-breathable air-permeable sheet layer 2b laminated on the surface of the fiber layer 2a. Since the hole h which penetrates the air-permeable sheet layer 2b from the surface 2 to the fiber layer 2a is drilled, the molten resin easily enters the fiber layer 2a having a relatively low density through the hole h. It is possible to further enhance the bonding strength of the resin molded product 3 by exerting a strong anchor effect.

<Example 2>
(1) Configuration of Injection Molding Apparatus As shown in FIG. 9, the injection molding apparatus 31 according to the present embodiment has a resin molded product 33 (for example, a clip, a bracket, etc.) on a part of the surface of the base material 32; c)) is injection-molded. The injection molding apparatus 31 includes a cylindrical mold 35, a punching member 36, a spring 45 (illustrated as “biasing means” according to the present invention) and an injection means 37 described below. In addition, the said base material 32 is provided with the fiber layer 32a and the non-breathable air-permeable sheet layer 32b laminated | stacked on the surface of this fiber layer 32a, and is used as a ceiling base material for vehicles. .

  The cylindrical mold 35 is formed in a cylindrical shape, and the shaft end surface is placed on the surface of the base material 32 placed on the placing table 28 to form an injection region S (see FIG. 10C). . The cylindrical mold 35 is supported by a support column 39 erected on the mounting table 38 through a bracket 34 so as to be movable up and down. Further, the drilling member 36 is movable between the injection position P (see FIG. 10A) along the axial direction and the drilling position Q (see FIG. 10B) inside the cylindrical mold 35. Is provided. The spring 45 urges the drilling member 36 toward the injection position P. Further, the injection means 37 is for injecting molten resin to the punching member 36 located at the injection position P.

  The perforating member 36 includes a columnar main body 40 and a plurality (two in the drawing) of rod-shaped protrusions 41 extending in the centrifugal direction from the outer peripheral side of the main body 40. The main body 40 has an outer peripheral surface that is in sliding contact with the inner peripheral surface of the cylindrical mold 35. The injection region S is formed between the punching member 36, the cylindrical mold 35, and the base material 32 located at the injection position P (see FIG. 10C). In addition, a large number of drilling needles 42 that pierce the base material 32 are provided on the shaft end surface of the main body 40 in the axial direction. Further, an injection passage 44 connected to the injection region S is formed on the center side of the main body 40 so as to penetrate in the axial direction.

  Here, a support structure 46 is provided between the cylindrical mold 35 and the drilling member 36 to support the drilling member 36 movably between the injection position P and the drilling position Q with respect to the cylindrical mold 35. It has been. The support structure 46 includes a protrusion 41 provided on the drilling member 36 and a guide groove 47 that is formed in the cylindrical mold 35 and guides the protrusion 41. The guide groove 47 extends in the axial direction of the cylindrical mold 35, and guides the protrusion 41 to move the drilling member 36 in the axial direction of the cylindrical mold 35. The punching member 36 is located at the injection position P in a state where the protrusion 41 is guided to the upper end side of the guide groove 47, and is in a position where the protrusion 41 is guided to the lower end side of the guide groove 47. Located at Q.

  The spring 45 is disposed between the lower surface of the protrusion 41 of the drilling member 36 and the lower end surface of the guide groove 47. Then, the hole is formed in the base material 32 by moving the drilling member 36 from the injection position P to the drilling position Q against the biasing force of the spring 45. On the other hand, after drilling, the drilling member 36 is automatically returned to the injection position P by the biasing force of the spring 45. The protrusion 41 protrudes outside the cylindrical mold 35 through the guide groove 47 and can be gripped by the operator.

  The injection means 37 includes a band-shaped heater 50 that heats the inside of the cylindrical mold 35, and a piston 51 that slides on the inner peripheral surface of the cylindrical mold 35 and moves in the axial direction of the cylindrical mold 35. Yes. The heater 50 is wound around the outer periphery of the cylindrical mold 35 so as to melt resin pellets (for example, thermoplastic resin such as polypropylene) charged into the cylindrical mold 35. In addition, the said heater 50 heats 200-220 degreeC as a standard, when a resin pellet is a polypropylene.

  A support structure 53 is attached to the upper end side of the support column 39 via a bracket 52. A connecting rod 55 connected to the piston 51 is inserted into the support structure 53. The support structure 53 incorporates a known gear structure (not shown) that moves the connecting rod 55 up and down by rotating the operation lever 54.

(2) Operation of Injection Molding Device Next, the operation of the injection molding device 31 having the above configuration will be described. As shown in FIG. 10A, the shaft end surface of the cylindrical mold 35 is placed on the surface of the base material 32. At this time, the drilling member 36 is positioned at the injection position P with respect to the cylindrical mold 35. Next, as shown in FIG. 10B, when the drilling member 36 is moved to the drilling position Q against the biasing force of the spring 45 by the gripping operation of the protrusion 41, the surface of the base material 32 is moved to the surface side. A number of holes h are formed by the drilling needle 42. Next, as shown in FIG. 10C, when the punching member 36 is returned to the injection position P by the biasing force of the spring 45, an injection region S is formed between the punching member 36, the cylindrical mold 35, and the base material 32. It is formed.

  Thereafter, as shown in FIG. 11A, the resin pellets put into the cylindrical mold 35 are heated by the heater 50 and melted. Next, as shown in FIG. 11 (b), the molten resin in the tubular mold 35 is injected into the injection region S through the injection passage 44 of the drilling member 36 by pressing the piston 51 by operating the operation lever 54. . Next, as shown in FIG. 11 (c), by removing the cylindrical mold 35 from the base material 32, the base material 32 in which the resin molded product 33 is injection-molded on a part of the surface is obtained.

(3) Effects of Example As described above, according to the injection molding apparatus 31 of the present example, the cylindrical mold 35 in which the shaft end surface is placed on the surface of the base material 32 to form the injection region S, and the cylindrical mold 35 A punching member 36 movably provided between an injection position P and a punching position Q, a spring 45 for urging the punching member 36 toward the injection position P, and a punching member 36. Injection means 37 for injecting molten resin, and the hole h is formed in the base material 32 by moving the drilling member 36 from the injection position P to the drilling position Q against the biasing force of the biasing means 45. When the punching member 36 is returned to the injection position P by the biasing force of the biasing means 45, the molten resin injected from the injection means 37 enters the injection region S via the punching member 36. Since it is injected, a part of the molten resin injected into the injection region S is part of the base material 32. The resin molded product 33 is obtained by flowing into the holes h formed in FIG. Thereby, when the resin molded product 33 is injection-molded on a part of the surface of the base material 32, the drilling of the base material 32 and the injection of the resin can be efficiently performed with one apparatus. Furthermore, the apparatus can be made compact.

  In the present embodiment, the drilling member 36 is in sliding contact with the inner peripheral surface of the cylindrical mold 35 and moves between the injection position P and the drilling position Q, and the injection region S is located at the injection position P. Since it is formed between the punching member 36, the cylindrical mold 35 and the base material 32, the punching member 36 having a punching function constitutes a molding die. Therefore, further downsizing of the apparatus can be achieved.

  Further, in this embodiment, the protrusion 41 provided on the drilling member 36 protrudes outside the cylindrical mold 35 through the guide groove 47 provided on the cylindrical mold 35, so that the protrusion 41 is operated. Thus, the drilling member 36 can be manually moved from the injection position P to the drilling position Q. On the other hand, when the drilling member is moved by a driving means such as a cylinder or a motor, the equipment cost is increased.

  In this embodiment, the injection means 37 includes a heater 50 that heats the inside of the cylindrical mold 35, a piston 51 that slides on the inner peripheral surface of the cylindrical mold 35 and moves in the axial direction of the cylindrical mold 35, Therefore, the injection means 37 is configured using the cylindrical mold 35. Further, it is not necessary to provide a material tank or hopper as the injection means 37. Therefore, further downsizing of the apparatus can be achieved.

  Further, in this embodiment, since the piston 51 is slid in the cylindrical mold 50 by the operation of the operation lever 54 and the molten resin is injected from the injection means 37, the molten resin can be injected manually. On the other hand, equipment that injects molten resin with a driving means such as a cylinder or a motor has a high equipment cost.

  Furthermore, in this embodiment, the base material 32 includes a fiber layer 32a and a non-breathable air-proof sheet layer 32b laminated on the surface of the fiber layer 32a. Since the hole h that penetrates the air-venting sheet layer 32b from the surface of 32 to the fiber layer 32a is drilled, the molten resin easily enters the fiber layer 32a having a relatively low density through the hole h. It is possible to further enhance the bonding strength of the resin molded product 33 by exerting a strong anchor effect.

<Example 3>
Hereinafter, the injection molding apparatus according to the third embodiment will be described. However, the same components as those of the injection molding apparatus 31 according to the second embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

(1) Configuration of Injection Molding Apparatus As shown in FIG. 12, the injection molding apparatus 61 according to the present embodiment has a resin molded product 33 (for example, a clip, a bracket, etc.) on a part of the surface of the base material 32; c)) is injection-molded. The injection molding apparatus 61 includes a cylindrical mold 35, a punching member 36, a spring 45, an injection unit 37, and an injection member 63 described below.

  A support structure 64 is provided between the cylindrical mold 35 and the drilling member 36 to support the drilling member 36 movably between the injection position P and the drilling position Q with respect to the cylindrical mold 35. . The support structure 64 includes a protrusion 41 provided on the drilling member 36, and a guide groove 65 that is formed in the tubular mold 35 and guides the protrusion 41. The guide groove 65 extends in the axial direction of the cylindrical mold 35, and guides the protrusion 41 to move the drilling member 36 in the axial direction of the cylindrical mold 35.

  As shown in FIG. 13, a guide member 48 that can be operated by an operator is supported on the outer peripheral side of the cylindrical mold 35 so as to be movable in the axial direction of the cylindrical mold 35. A slide member 49 is supported in the guide groove 65 of the cylindrical mold 35 so as to be movable in the radial direction of the cylindrical mold 35. Each of the guide member 48 and the slide member 49 is formed with first cam surfaces 57a and 57b that are engaged with each other and convert the movement of the guide member 48 in the axial direction into the movement of the slide member 49 in the radial direction. ing. Each of the first cam surfaces 57 a and 57 b is inclined with respect to the axial direction and the radial direction of the cylindrical mold 35. In addition, each of the protrusion 41 and the slide member 49 of the drilling member 36 is engaged with each other to convert the radial movement of the slide member 49 into the axial movement of the drilling member 36. Surfaces 58a and 58b are formed. Each of these second cam surfaces 58 a and 58 b is inclined with respect to the axial direction and the radial direction of the cylindrical mold 35.

  The spring 45 is disposed between the lower surface of the protrusion 41 of the drilling member 36 and the lower end surface of the guide groove 47. Then, the hole is formed in the base material 32 by moving the drilling member 36 from the injection position P to the drilling position Q against the biasing force of the spring 45. On the other hand, after drilling, the drilling member 36 is automatically returned to the injection position P by the biasing force of the spring 45.

  The injection member 63 is attached to the inside of the cylindrical mold 35, and the injection area S is formed between the cylindrical mold 35 and the base material 32 by dividing the inside of the cylindrical mold 35 in the axial direction. In addition, the injection member 63 is provided with an insertion hole 67 through which the drilling needle 42 provided in the drilling member 36 is inserted. When the punching member 36 is located at the injection position P, the punching needle 42 is stored in the insertion portion 67. Further, an injection passage 68 connected to the injection region S is formed on the center side of the injection member 63 so as to penetrate in the axial direction.

(2) Operation of Injection Molding Device Next, the operation of the injection molding device 61 having the above configuration will be described. As shown in FIG. 13A, the shaft end surface of the cylindrical mold 35 is placed on the surface of the base material 32. At this time, the drilling member 36 is positioned at the injection position P with respect to the cylindrical mold 35. Next, as shown in FIG. 13B, when the guide member 48 is pushed down, the slide member 49 moves in the centripetal direction by the locking of the first cam surfaces 57a and 57b. Then, the drilling member 36 is moved to the drilling position Q against the biasing force of the spring 45 by the locking of the second cam surfaces 58a, 58b, and a number of holes are formed by the drilling needles 42 on the surface side of the base 32. h is drilled. Next, as shown in FIG. 13C, when the punching member 36 is returned to the injection position P by the urging force of the spring 45, each punching needle 42 is stored in the insertion hole 67.

  Thereafter, as shown in FIG. 14A, the resin pellets put into the cylindrical mold 35 are heated by the heater 50 and melted. Next, as shown in FIG. 14 (b), the molten resin in the cylindrical mold 35 is pressed through the injection passage 44 of the punching member 36 and the injection passage 68 of the injection member 63 by pressing the piston 51 by operating the operation lever 54. And injected into the injection region S. Next, as shown in FIG. 14C, by removing the cylindrical mold 35 from the base material 32, the base material 32 in which the resin molded product 33 is injection-molded on a part of the surface is obtained. The guide member 48 is returned to the state shown in FIG. 13A by being pushed up against the urging force of the spring 45 from the state shown in FIG.

(3) Effects of the Embodiment From the above, according to the injection molding apparatus 61 of the present embodiment, in addition to the effects and effects similar to those of the injection molding apparatus 31 according to the second embodiment, An injection member 63 that is attached and partitions the inside of the cylindrical die 35 in the axial direction to form an injection region S between the cylindrical die 35 and the base material 32 is provided on the injection member 63. An insertion hole 67 through which the punched needle 42 is inserted is provided, and when the drilling member 36 is located at the injection position P, the drilling needle 42 is accommodated in the insertion hole 67. It is difficult to form a hole mark by the drilling needle 42, and the design of the resin molded product 33 can be improved.

  In the present embodiment, the cylindrical mold 35 includes a guide member 48 that is movable in the axial direction and a slide member 49 that is movable in the radial direction. The guide member 48 and the slide member 49 are engaged with each other. The first cam surfaces 57a and 57b that stop and convert the movement of the guide member 48 in the axial direction into the movement of the slide member 49 in the radial direction are provided. The drilling member 36 and the slide member 49 are engaged with each other. Since the second cam surfaces 58a and 58b that stop and convert the radial movement of the slide member 49 into the axial movement of the drilling member 36 are provided, the drilling member 36 is operated by operating the guide member 48. It can be manually moved from the injection position P to the drilling position Q. On the other hand, when the drilling member is moved by a driving means such as a cylinder or a motor, the equipment cost is increased.

  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. In other words, in the first to third embodiments, the springs 15 and 45 are exemplified as the urging means. However, the present invention is not limited to this, and for example, an elastic body such as rubber or elastomer, an air cushion structure, or the like may be employed.

  In the first embodiment, the biasing means (spring 15) is provided between the cylindrical mold 5 and the drilling member 6. However, the present invention is not limited to this. For example, the first operation lever 18 and the mounting table are provided. A biasing means may be provided between the locking member 19 and the mounting table 8.

  In the first to third embodiments, the projecting portions 11 and 41 are attached to the cylindrical shape 35 with an appropriate fixing tool (for example, a screw or a clamp) in a state where the drilling members 6 and 36 are located at the injection position P. The positioning may be held.

  In the first to third embodiments, the projecting portions 11 and 41 are provided on the drilling members 6 and 36, and the guide grooves 17, 47 and 65 for guiding the projecting portions are provided on the cylindrical molds 5 and 35. However, the present invention is not limited to this, and for example, a protrusion may be provided on the cylindrical shape, and a guide groove for guiding the protrusion may be provided on the drilling member.

  Moreover, in the said Examples 1-3, although the cylindrical cylinder shapes 5 and 35 were illustrated, it is not limited to this, For example, it is good also as a square cylinder shape.

  In the first to third embodiments, the drilling members 6 and 36 are manually moved from the injection position P to the drilling position Q. However, the present invention is not limited to this. For example, driving means such as a cylinder or a motor Thus, the drilling member may be moved.

  In the first to third embodiments, the pistons 25 and 51 are manually driven to inject the molten resin. However, the present invention is not limited to this. For example, the piston is driven by a driving unit such as a cylinder or a motor. The molten resin may be injected.

  Moreover, in the said Example 1, although the piston type injection cylinder 7 was illustrated, it is not limited to this, For example, it is good also as a screw type injection cylinder.

  Moreover, in the said Example 2 and 3, although the piston 51 which slidably contacts to the internal peripheral surface of the cylinder shape 35 was illustrated, it is not limited to this, For example, as shown in FIG. The piston 51 may be in sliding contact with the inner peripheral surface of the cylindrical portion 69 into which resin pellets are charged.

  Moreover, in the said Examples 1-3, although the form which drills the needle-shaped hole h in the base materials 2 and 32 was illustrated, it is not limited to this, For example, it seems to form a slit-shaped hole in a base material It may be.

  Furthermore, although the base material for vehicle ceiling was illustrated in the said Examples 1-3, it is not limited to this, For example, it is good also as a base material of vehicle interior materials, such as a door trim, a floor carpet, a floor mat, a dash silencer. .

  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.

  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 injection molding a resin molded product on a part of the surface of a substrate.

  DESCRIPTION OF SYMBOLS 1,31,61; Injection molding apparatus, 2,32; Base material, 3,33; Resin molded product, 5,35; Cylindrical shape, 6,36; Drilling member, 7,37; Injection means, 11,41 Projection, 15, 45; Spring, 63; Injection member, 67; Insertion hole, P: Injection position, Q: Drilling position, S: Injection region, h: Hole.

Claims (4)

An injection molding apparatus for injection molding a resin molded product on a part of the surface of a substrate,
A cylindrical mold in which an axial end surface is placed on the surface of the base material to form an injection region inside,
A drilling member provided movably between an injection position and a drilling position inside the cylindrical mold;
A biasing means for biasing the punching member toward the injection position;
An injection means for injecting a molten resin to the drilling member,
A hole is formed in the base material by moving the punching member from the injection position to the drilling position against the biasing force of the biasing means, and the biasing force of the biasing means causes the An injection molding apparatus, wherein a molten resin injected from the injection means is injected into the injection region through the punching member in a state where the punching member is returned to the injection position.   The drilling member is in sliding contact with the inner peripheral surface of the cylindrical mold and moves between the injection position and the drilling position, and the injection region is located in the injection position. The injection molding apparatus according to claim 1, which is formed between a mold and the substrate.   An injection member attached to the inside of the cylindrical mold and partitioning the inside of the cylindrical mold in the axial direction to form the injection region between the cylindrical mold and the base material, the injection member having the hole The injection molding according to claim 1, wherein an insertion hole through which a drilling needle provided in the drilling member is inserted is provided, and the drilling needle is accommodated in the insertion hole when the drilling member is located at the injection position. apparatus. An injection molding method using the injection molding apparatus according to any one of claims 1 to 3,
Placing the cylindrical shaft end face on the surface of the substrate;
Moving the drilling member from the injection position to the drilling position against the biasing force of the biasing means to drill a hole in the base material;
Injecting molten resin injected from the injection means into the injection region via the punching member in a state where the punching member is returned to the injection position by the biasing force of the biasing means; An injection molding method comprising:

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