JP2008195008A - Molded object manufacturing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molded object manufacturing apparatus capable of narrowing an installation space and achieving energy saving. <P>SOLUTION: A pair of primary injection cavities 23-26 capable of molding first and second semimanufactured products is provided at the first mold clamping position of molds 21 and 22 for a molded object and a blow molding cavity 31 capable of performing blow molding in the state that one of the first and second semimanufactured products is left in the molds is provided at the second mold clamping position of the molds 21 and 22 for the molded object. The blow molded product molded in the blow molding cavity 31 at the third mold clamping position of the molds 21 and 22 for the molded object is left in the molds to bond the other one of the first and second semimanufactured products and the blow molded product by secondary injection. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a molded body manufacturing apparatus.

Conventionally, for example, an in-vehicle relay switch or the like has been used by housing and arranging an electrical component such as a coil in a resin casing. However, the shape of the casing is complicated, Since the thickness of the body may be thin, the casing is generally manufactured by blow molding.
Here, as a method of blow molding a resin casing, a cold parison method or the like is known. This cold parison method uses an injection molding machine in another process to pre-mold a resin preform by injection molding, and then supplies the molded preform to a blow molding machine. What is blow-molded into a predetermined product shape after being heated in (see, for example, Patent Document 1).
JP-A-8-164556

  By the way, in the blow molding apparatus of patent document 1, in order to manufacture preform with another injection molding machine, convey it to a blow molding apparatus, and heat and manufacture a preform again, the installation space of an apparatus is widened. There is a problem that it is necessary to ensure, and costs and energy loss for transportation and reheating occur.

  This invention is made | formed in view of the said situation, and provides the molded object manufacturing apparatus which can aim at energy saving while narrowing an apparatus installation space.

  In order to solve the above-described problems, the invention described in claim 1 is for a pair of primary injections capable of molding a first semi-finished product and a second semi-finished product at a first clamping position of a mold for a molded body. In addition to providing a cavity, a blow molding cavity is provided at the second clamping position of the mold for molding so that one of the first semi-finished product and the second semi-finished product remains in the die. , Leaving the blow molded product molded in the blow molding cavity in the third mold clamping position of the molded product mold in the mold, and the other of the first semifinished product and the second semifinished product, and the The blow-molded product is configured to be coupled by secondary injection.

  The invention described in claim 2 is characterized in that a component incorporating part is formed in at least one of the first semi-finished product and the second semi-finished product, and a component incorporating means for incorporating the component into the component incorporating part is provided. To do.

  According to a third aspect of the present invention, the component is an electrical component having a terminal, and in the pair of molds for molding the first semi-finished product and the second semi-finished product by the primary injection, one molding is performed. The body mold is formed with a built-in mold part for forming a component built-in part of the electrical component and an insertion hole mold part for forming an insertion hole for the terminal protruding from the electrical component, A restriction part for restricting the injection of the primary injection material into the insertion hole mold part in the primary injection step is formed in the mold for molding.

  The invention described in claim 4 is characterized in that it comprises the mold for a molded body in which a film forming means for forming a film on at least one of the semi-finished products is incorporated.

  The invention described in claim 5 is characterized in that the blow molding cavity in the molding die is formed by a separable die.

  According to the invention described in claim 1, a plurality of semi-finished products are respectively formed by primary injection, and after blow-molding at least one of the formed semi-finished products, the semi-finished products are brought into contact with each other, and a secondary portion is placed on the butt portion Since a molded product mold that can be integrally molded by injection is provided, a series of moldings in a pair of molded product molds having a third mold clamping position from the first mold clamping position In this process, injection molding and blow molding can be performed, and the apparatus installation space can be reduced, and energy can be saved.

  According to the second aspect of the present invention, since the components can be integrally formed after being incorporated into the product, the workability can be improved.

  According to the third aspect of the present invention, since an electrical component can be incorporated into the product and a terminal required for connection between the electrical component and an external device can be reliably formed, Among them, there is an effect that a highly reliable product can be manufactured.

  According to the invention described in claim 4, since the film can be reliably formed inside the product, the film can be efficiently formed and can be easily manufactured, and the apparatus is simplified. There exists an effect which can be manufactured with a structure.

  According to the invention described in claim 5, since the semi-finished product processed into a shape that cannot be pulled out from the mold for molding by blow molding can be removed from the mold by separating the mold, it is complicated. There is an effect that a product having a simple shape can be produced reliably.

Next, an embodiment of the present invention will be described with reference to FIGS. In addition, in this embodiment, the molded object manufacturing apparatus which manufactures a vehicle-mounted relay switch is demonstrated.
As shown in FIG. 1, the relay switch 1 includes a housing 2 that can accommodate electrical components to be described later and has an opening formed in a lower portion thereof, closes the opening of the housing 2, and opens the opening of the housing 2. A bottom plate portion 3 configured to be able to be joined to the peripheral edge portion and an electrical component 4 accommodated in the housing 2 are provided. Here, the housing | casing 2 and the baseplate part 3 are formed with the same resin material.

  As shown in FIG. 2, the housing 2 is hollow and has a substantially rectangular parallelepiped shape, and a flange portion 5 is formed at the lower end thereof so as to extend outward in the horizontal direction. In addition, a recess 8 is formed at the periphery of the bottom surface 7 under the outer end surface 6 of the flange 5. Furthermore, the lower part of the housing | casing 2 is opened, and it is comprised so that the electrical component 4 can be accommodated.

  The bottom plate portion 3 includes a rectangular bottom plate main body portion 9 and a convex portion 10 formed on the periphery of the bottom plate main body portion 9. A recess 13 is formed at the upper edge of the outer end surface portion 11 of the bottom plate main body portion 9 and at the periphery of the convex portion 10. Then, after the housing 2 and the bottom plate portion 3 are brought into contact with each other, the resin material 14 is secondarily injected into an area formed by the hollow portion 8 of the housing 2 and the hollow portion 13 of the bottom plate portion 3 and integrally molded. ing. Furthermore, the bottom plate main body 9 is formed with a plurality of through holes 16 (for example, three places) through which the terminals 15 of the electrical component 4 are inserted.

  The electrical component 4 includes a terminal 15 and a main body portion 17 composed of coils and contacts. The terminal 15 is connected to a wiring or the like (not shown) so as to be connected to a vehicle control unit or the like.

Next, a manufacturing apparatus for the relay switch 1 will be described.
As shown in FIG. 3, the manufacturing apparatus 20 includes a movable mold 21 and a fixed mold 22. Molding mold surfaces 23 and 24 for forming the casing 2 and the bottom plate portion 3 are formed on the movable mold 21, and the casing 2 and the bottom plate portion 3 are formed on the fixed mold 22. A molding die surface 31 for blow molding is formed together with the molding die surfaces 25 and 26. These mold surfaces are detachably attached to the mold base.

  The molding die surface (built-in mold portion) 24 for molding the bottom plate portion 3 of the movable mold 21 has a hollow portion (insertion hole mold portion) 32 into which the terminal 15 is inserted when the electric component 4 is assembled. Is formed. Further, the through hole 16 is formed in the molding die surface 26 for molding the bottom plate portion 3 of the fixed mold 22 so that the resin material does not flow into the hollow portion 32 when the resin material is primarily injected. A projecting portion (regulating portion) 33 is formed. That is, the protrusion 33 is configured to be fitted into the recess 32.

  The blow molding device 30 is a known device, and the fixed mold 22 is provided with a molding die surface 31 in which a die is formed in the same shape as the outer shape of the primary product after blow molding. The mold 21 includes a supply port 36 through which blow air is supplied to the parison 35 formed by primary injection, a flow path 37 extending from the supply port 36, a valve 38 provided in the middle of the flow path 37, and And a pump 39 for supplying blow air connected via a valve 38.

  The movable mold 21 is configured such that movement between adjacent molds and movement along the mold surface can be performed by an actuator (servo motor or cylinder) (not shown).

Next, the process of forming the relay switch 1 will be described with reference to FIGS.
As shown in FIG. 4A, the mold surfaces 23 and 24 of the movable mold 21 are arranged so as to face the mold surfaces 25 and 26 of the fixed mold 22, respectively.

  As shown in FIG. 4B, the movable mold 21 is moved in the direction of the fixed mold 22 and clamped. In this clamped state (first clamped position), the parison 35 and the bottom plate of the housing 2 are fixed. The part 3 is molded by primary injection. Here, the resin material is supplied from a pipe (not shown) to a cavity formed by clamping the molds 21 and 22. Moreover, the resin material of the housing | casing 2 and the baseplate part 3 employ | adopts the same material.

  As shown in FIG. 4C, the movable mold 21 is moved in the mold opening direction. At this time, both the parison 35 and the bottom plate portion 3 are designed so as to be positioned on the movable mold 21 side by an unillustrated pushing member or the like.

  As shown in FIG. 5D, the movable mold 21 is moved in the direction along the mold surface (horizontal direction) so that the parison 35 faces the blow molding apparatus 30.

  As shown in FIG. 5 (E), the movable mold 21 is moved in the mold clamping direction to clamp the parison 35 and the blow molding device 30 (second mold clamping position), and a sealed blow molding space. Is formed, the valve 38 is opened, the pump 39 is driven, blow air is supplied from the supply port 36 to the parison 35, and the parison 35 is blow-molded.

  As shown in FIG. 5 (F), if the blow air is continuously supplied in the state of FIG. 5 (E), the parison 35 is deformed so as to expand, and becomes a shape substantially equivalent to the mold shape of the molding die surface 31. A housing 2 is formed.

  As shown in FIG. 6G, after the blow molding is completed, the movable mold 21 is moved in the mold opening direction to open the mold from the molding die surface 31. Thereafter, the electric component 4 composed of the main body portion 17 and the terminal 15 is assembled so that the terminal 15 is inserted into the through hole 16 formed in the bottom plate portion 3, and the movable mold 21 is in a direction along the mold surface (horizontal The casing 2 and the bottom plate 3 are arranged so as to face each other. Here, after the electric component 4 is assembled by a robot arm (component incorporating means) or the like, the electric component 4 may be bonded to the bottom plate portion 3 with an adhesive (not shown). Further, a hole filling material (not shown) may be inserted into the gap between the through hole 16 and the terminal 15.

  As shown in FIG. 6 (H), the movable mold 21 is moved toward the fixed mold 22 and clamped, and in this clamped state (third clamped position), the housing 2 and the bottom plate portion 3 are moved. The resin material 14 is integrally molded by secondary injection. Here, when the movable mold 21 and the fixed mold 22 are clamped, the resin material 14 is supplied to the region formed by the recess 8 of the housing 2 and the recess 13 of the bottom plate 3 to perform secondary injection. To do. Further, since the resin material 14 is made of the same material as the housing 2 and the bottom plate portion 3 and the temperature of the housing 2 and the bottom plate portion 3 is maintained at a high temperature during the secondary injection, the housing 2 and the bottom plate portion 3 are maintained. And the resin material 14 are configured to be securely fused.

  As shown in FIG. 6 (I), after the secondary injection is completed, the movable mold 21 is moved in the mold opening direction, and the relay switch 1 is taken out by an unillustrated pushing member. And the relay switch 1 can be continuously manufactured by moving the movable metal mold | die 21 to the state of FIG. 4 (A) again, and repeating the above-mentioned series of processes.

Next, the mold clamping state in the case of primary injection and secondary injection will be described in detail with reference to FIG.
As shown in FIG. 7A, on the side of the bottom plate portion 3, the mold surface 24 for the movable mold 21 is subjected to the secondary injection together with the bottom surface 41 of the bottom plate portion 3 and the mold surface corresponding to the outer end surface portion 11. One surface of the injection region of the resin material 14 to be formed, that is, a mold surface such as a mold surface 42 that is flat with the outer end surface portion 11 is formed. On the other hand, the mold surface 26 of the fixed mold 22 is formed with mold surfaces corresponding to the convex portions 10 and the recessed portions 13.

  As shown in FIG. 7B, on the housing 2 side, a mold surface corresponding to each of the bottom surface portion 7 and the recessed portion 8 of the flange portion 5 is formed on the molding die surface 23 of the movable mold 21. Has been. On the other hand, on the molding die surface 25 of the fixed mold 22, the outer end surface portion 6 and one surface of the injection region of the resin material 14 to be secondarily injected, that is, the mold surface 43 flat with the outer end surface portion 6 are formed. Yes. And primary injection is performed in this clamping state, and the parison 35 and the baseplate part 3 of the housing | casing 2 are die-molded as a primary product.

  As shown in FIG. 7C, after the parison 35 and the bottom plate portion 3 of the lens portion 2 are molded by primary injection, the molding die surface 25 on the fixed mold 22 side is removed on the parison 35 side, and the bottom plate On the part 3 side, the molding die surface 26 on the fixed mold 22 side is removed. Thereafter, the parison 35 is blow-molded by the blow molding device 30 to be formed as the casing 2, and then the casing 2 and the bottom plate portion 3 face each other in a state of being disposed on the molding die surface 31 side. The movable mold 21 is moved and the mold is clamped. That is, the mold is clamped so that the bottom surface portion 7 and the top surface 12 of the convex portion 10 abut. Here, the assembly process of the electric component 4 provided with the main body portion 17 and the terminal 15 on the bottom plate portion 3 is performed before the mold clamping.

  Then, the resin material 14 is secondarily injected in this mold-clamped state. In the state of mold-clamping, the resin material 14 that is secondarily injected is formed in the recessed portion 8 and the bottom plate portion 3 of the housing 2. It is supplied into the region formed by the depression 13.

  As shown in FIG. 8, for example, when the housing 2 is partially (side) formed with a convex portion 51, the housing 2 is formed from the molding die surface 31 after being molded by the blow molding device 30. It cannot be pulled down. In such a case, a division part 52 capable of dividing the fixed mold 22 is formed. The housing 2 can be removed from the molding die surface 31 by separating the fixed mold 22 left and right (horizontal direction) at the dividing portion 52. Here, as a means for separating the molds, the mold is moved by a motor (not shown) or the like.

  According to the present embodiment, the molding die surfaces 23, 24, 25, and 26 that can mold the parison 35 and the bottom plate portion 3 of the housing at the first clamping position of the pair of molding dies 21 and 22. And a blow molding device 30 capable of blow molding the parison 35 at the second clamping position, blow molded at the molding die surface 31, and molded by the blow molding device 30 at the third clamping position. Since the housing 2 is left in the mold and the housing 2 and the bottom plate portion 3 are configured to be coupled by secondary injection, the pair of molded bodies having a third clamping position from the first clamping position. Injection molding and blow molding can be performed in a series of steps in the molds 21 and 22, and the apparatus installation space can be narrowed and energy saving can be achieved.

  In addition, since the component assembly means for incorporating the electrical component 4 into the space in the housing formed by the housing 2 and the bottom plate portion 3 is provided, the electrical component 4 is securely incorporated into the relay switch 1 and then integrally molded. Therefore, workability can be improved.

  Further, when assembling the electric component 4, when the bottom plate portion 3 is formed by primary injection, a hollow portion 32 (insertion hole) for inserting the terminal 15 of the electric component 4 into the forming mold surface 24 of the movable mold 21. In order to prevent the resin material from flowing into the hollow portion 32 during the primary injection, the through hole 16 is formed in the bottom plate portion 3 in the molding die surface 26 of the fixed mold 22. Since the protrusion 33 (regulator) is formed, the electrical component 4 can be incorporated into the relay switch 1 and the terminal 15 necessary for connection between the electrical component 4 and an external device can be securely attached. , A highly reliable product can be manufactured in a series of flows.

  Since the molding die surface 31 for blow molding in the molding die 22 is formed by a separable die, the housing processed into a shape that cannot be pulled out from the molding die surface 31 by blow molding. Since the body 2 can be removed from the mold by separating the mold at the dividing portion 52, a product having a complicated shape can be reliably manufactured.

  The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the specific configuration such as the shape and material of each member constituting the relay switch is not limited to the above embodiment, and can be changed as appropriate.

  As shown in FIG. 9, in the present embodiment, the description has been given using the apparatus not provided with the film forming means, but the film forming apparatus 60 for forming a film on at least one of the housing 2 and the bottom plate portion 3 is provided. It can also be built in, so that the film can be reliably formed inside the product, so that the film can be formed efficiently and can be manufactured easily and simplified. There exists an effect which can be manufactured with the apparatus structure which was made.

It is a perspective view of the relay switch in the embodiment of the present invention. It is sectional drawing of the relay switch in embodiment of this invention. It is a schematic explanatory drawing of the manufacturing apparatus of the relay switch in embodiment of this invention. It is explanatory drawing which shows the manufacturing process of the relay switch in embodiment of this invention. It is explanatory drawing which shows the continuation of FIG. It is explanatory drawing which shows the continuation of FIG. It is principal part detailed sectional drawing of the metal mold | die of the relay switch in embodiment of this invention. It is a schematic explanatory drawing of the manufacturing apparatus of another structure in embodiment of this invention. It is a schematic explanatory drawing of the manufacturing apparatus of another structure in embodiment of this invention.

Explanation of symbols

  2 ... Case (blow molded product) 3 ... Bottom plate part (second semi-finished product) 4 ... Electrical component (component) 16 ... Through hole (component built-in part) 21 ... Movable mold (molded product mold) 22 ... Fixed Mold (molded mold) 23, 24, 25, 26 ... Mold surface (primary injection cavity) 31 ... Mold surface (blow molding cavity) 32 ... Recessed part (insertion hole mold part) 33 ... Protrusions (regulators) 35 ... Parison (first semi-finished product) 52 ... Division part 60 ... Film forming apparatus (film forming means)

Claims (5)

In addition to providing a pair of primary injection cavities capable of molding the first semi-finished product and the second semi-finished product at the first mold clamping position of the molded article mold,
Providing a blow molding cavity capable of blow molding in a state in which one of the first semi-finished product and the second semi-finished product is left in the mold at the second mold clamping position of the molded article mold;
The blow molded product molded by the blow molding cavity at the third mold clamping position of the molded product mold is left in the mold, and the other of the first semi-finished product and the second semi-finished product and the blow molding are left. An apparatus for manufacturing a molded body, characterized in that it is configured to be able to be joined to a molded product by secondary injection.   2. The molded body according to claim 1, wherein a component incorporating portion is formed in at least one of the first semi-finished product and the second semi-finished product, and a component incorporating means for incorporating the component into the component incorporating portion is provided. Manufacturing equipment. The component is an electrical component having a terminal, and in the pair of molds for molding the first semi-finished product and the second semi-finished product by the primary injection,
One mold body mold is formed with a built-in mold portion for forming the component built-in portion of the electric component and an insertion hole mold portion for forming the insertion hole for the terminal protruding from the electric component. And
3. The restricting portion for restricting the injection of the primary injection material into the insertion hole mold portion in the primary injection step is formed in the other mold body. The molded object manufacturing apparatus as described.   The molded body manufacturing apparatus according to any one of claims 1 to 3, further comprising a mold for the molded body in which film forming means for forming a film on at least one of the semi-finished products is incorporated.   The molded body manufacturing apparatus according to any one of claims 1 to 4, wherein the blow molding cavity in the molded body mold is formed by a separable mold.

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