JPH0541749U - Molded product take-out device - Google Patents

Abstract

(57) [Summary] [Purpose] A thin injection molded product can be taken out of a mold without deformation. [Structure] A molded product 20 is side-chucked to regulate its position to a predetermined position, and a chuck member 33 for auxiliary supporting the molded product and a chuck member 33 adapted to correspond to the predetermined position to adsorb the molded product 20. And a suction member 41, and the chuck member
By the action of 33 and the suction plate 41, the molded product 41 is taken out of the mold.

Description

[Detailed description of the device]

The present invention relates to a molded product take-out device, and more particularly to a molded product take-out device for injection-molding an openable / closable shutter mounted on a cartridge case for accommodating a disk-shaped recording medium and taking it out of a mold.

[0002]

[Prior Art]

 2. Description of the Related Art In recent years, disk-shaped recording media such as magnetic disks, optical disks and magneto-optical disks have been widely used due to their ease of handling and large storage capacity with respect to volume ratio. As this type of disc cartridge, for example, a 3.5-inch micro floppy disc as shown in FIG. 3 is known. The micro-floppy disk 1 has a magnetic disk 5 rotatably housed inside the upper and lower rectangular half shells 2 and 3 injection-molded of ABS resin or the like. The magnetic disk 5 is a flexible magnetic recording medium in which a magnetic layer is uniformly formed on the surface of a disk-shaped polymer film base, and the circular opening formed in the center of the magnetic disk 5 is a ring. The center plate 4 is fixed. At the center of the lower half shell 3 of the micro-floppy disk 1, there is formed an opening 7 for the motor shaft to enter into a substantially square motor shaft insertion hole 6 formed at the center of the center plate 4. Is made. Further, a magnetic head and a head pad for writing or reading a predetermined information signal with respect to the magnetic disk 5 enter the upper and lower half shells 2 and 3, so that they are opened in front of the micro-floppy disk 1. An opening 8 for inserting a magnetic head is formed. Further, in order to prevent dust and the like from entering the micro floppy disk 1 through the magnetic head insertion opening 8 and adhering to the magnetic disk 5, the magnetic head A slide type shutter 9 for opening and closing the insertion opening 8 is attached.

Conventionally, the shutter 9 is formed by bending a metal plate such as a thin stainless plate into a U-shape, and a protrusion projecting in the vicinity of the base of the shutter 9 is formed on the lower half shell 3. Guided in a guide groove provided along the side edge of the front outer surface, it is slidably mounted in the direction of opening and closing the magnetic head insertion opening 8. That is, the shutter 9 slides in the sliding area portion 11 formed in an area including the peripheral edge of the magnetic head insertion opening 8 and extending over one side surface of the microfloppy disk 1. The shutter 9 is formed with an opening 10 that is exposed to the outside of the magnetic disk 5 so as to coincide with the magnetic head insertion opening 8 when in use, and is shown in phantom in FIG. 1 when not in use. As shown, the magnetic head insertion opening 8 is closed by the shutter 9, and the magnetic disk 5 is covered by the shutter 9.

By the way, in recent years, as disclosed in, for example, Japanese Patent Laid-Open Nos. 60-231985 and 64-70981, the shutter, which is conventionally formed of a thin metal plate such as stainless steel, is made of a synthetic resin material. A resin shutter has been proposed that can be easily and inexpensively manufactured by injection molding. As a synthetic resin material for such a shutter, a crystalline plastic having a self-lubricating property such as polyacetal or the like is generally regarded as emphasizing the function as a product. However, this crystalline plastic requires a mold temperature (usually about 70 ° C to 90 ° C) that is high enough to grow crystals, and the molded product temperature when taken out from the mold is also high. The temperature is about 80 ° C to 100 ° C.

[0005]

[Problems to be solved by the device]

 By the way, in order to remove the injection-molded article from the molding die and move it to the next step, a chucking device (such as disclosed in Japanese Utility Model Publication Nos. 57-4310 and 59-129517) has been conventionally used ( A take-out device) is used. That is, in the chucking devices described in these publications, a pair of chuck members opened and closed by a cylinder press the molded product from both sides by the chuck surfaces, and the molded product is taken out from the mold. There is. However, in the above-mentioned shutter molded product, in addition to the high temperature as already described when it is taken out from the mold, and the wall thickness thereof is very thin, about 0.2 mm to 0.5 mm, it is described in the above publication. If a take-out device having a chucking structure that presses and clamps a molded product with the chuck surface formed is applied, the shutter is easily deformed by a slight external force (chuck force) received from the take-out device. Further, since the shutter molded product is injection-molded so that it is deeply inserted into the mold, when chucking it in a direction orthogonal to the extraction direction, the chuck position may be displaced. When chucked, a forced removal state occurs due to the displacement. This causes deformation of the shutter.

Further, as described above, when an extremely thin shutter molded product having a U-shaped cross section is sandwiched and held by chuck surfaces from both sides, the molded product 50 has only one outer surface portion as shown in FIG. When the chuck 50 is chucked in an inclined state as if it is in contact with the chuck surface 51, for example, the back surface 50a of the molded product 50 (a U-shaped bent connecting portion) is likely to be bent and deformed as shown by imaginary lines. However, the accurate gripping due to the deformation is not guaranteed, and it causes troubles such as poor conveyance to the next process. In particular, since the chuck surface is generally provided with the elastic material 52, the left and right corners 50b of the back surface 50a come to bite into the elastic material 52, and the recess 53 is formed in the elastic material 52. Due to the recess 53, the portion immediately below the corner 50b may be deformed so as to be recessed inward. In order to avoid the tendency of the chuck to be easily deformed, it is conceivable to reduce the chucking force. However, this adjustment is extremely difficult because the chucking force is reduced when the chucking force is reduced. It was difficult for me.

Further, as a conventional device, there is a device for taking out the shutter from the mold by adsorbing the back face of the shutter with a suction plate so that the taking-out posture is improved. However, in this backside suction device, the shutter has a very narrow backside of about 3.6 mm, so it is necessary to accurately position the shutter with respect to the suction plate in order to obtain sufficient suction force. Therefore, in the conventional device, as shown in FIG. 5, the shutter 50, which is protruded from the mold by the projecting pin 61 by a certain amount, has both sides thereof on the guide 64 having the suction plate 63 at the back and the guide inclined surface 65. They are brought into contact with each other and guided to the suction position. However, since the shutter 64 is in a high temperature state, the guide 64 that regulates the positions on both sides of the molded product is extremely soft even though it is a molded product. When inserting the portion of the shutter back surface into the surface 65, it is easy to apply an excessive force to the shutter 62, and the positional displacement of the guide 64 is large.In the worst case, the protruding pin 61 may be damaged by the guide 64. There were times when it ended up. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a molded product take-out device that can take out a molded product that has been injection-molded from a mold at high speed without deformation.

[0008]

[Means for Solving the Problems]

 The object of the present invention is a device for taking out an injection-molded product from a molding die, which is fixed to a movable support frame and has a U-shaped cross-section from both side ends. A pair of chuck members that abut with elastic members to sandwich the molded product and regulate the position of the molded product at a predetermined position, and the support frame can be elastically moved in a direction directly intersecting with the chuck members. And a chucking plate that comes into contact with the back surface of the molded product whose position is regulated by the chuck member and adsorbs the molded product on the back surface, and the molded product partially exposed from the molding die is the chuck member. This is achieved by a molded product take-out device that positions and holds the molded product, sucks the back surface with the suction plate, and takes out the molded product from the injection mold by moving the support frame.

[0009]

Embodiment

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view illustrating a shutter 20 of a 3.5 inch micro floppy disk taken out from an injection mold by the device of the present invention. The shutter 20 is a bent member having a U-shaped cross section that is injection-molded from polyacetal resin, has an appropriate protrusion formed inwardly (not shown), and is slidably engaged with the cartridge shell to provide a cartridge. An opening portion 21 is formed which corresponds to the opening for inserting the magnetic head in use and exposes the magnetic disk to the outside.

FIG. 2 is a partial sectional front view of an embodiment of the molded product take-out apparatus 40 of the present invention. In the figure, this device allows a support frame 30 with a U-shaped cross section to enter while the mold 70 shown in phantom is released (fixed side and movable side are released) (with respect to the paper surface). It is movable in the vertical direction or the horizontal direction) and is movable in the vertical direction (directions of arrows C and D) with respect to the parting surface 71 of the mold 70. At the time of descending, it is arranged at a predetermined distance from the mold. In the support frame 30, chuck members 33 are fixed to respective facing walls 31 facing each other, and a suction unit having one suction plate 41 is provided on a top plate wall 32 thereof. The pair of chuck members 33 are attached to the facing wall 31 so as to face each other, and have an air cylinder 35 having a piston rod 34 that can be expanded and contracted in a support body, and a flat plate fixed to the rod tips and facing each other. When the chuck pieces 36 are moved toward each other in the closing direction (direction B in the figure), the chuck pieces 36 come into contact with each other extremely softly from both side surfaces of the shutter 20. The shutter 20 is auxiliary clamped. That is, the chuck piece 36 has the sponge rubber 37 as an elastic material adhered to the contact surface with the shutter 20, and the closest distance to the facing piece when the chuck piece 36 is closed is the thickness of the shutter 20. It is set to be smaller by 0.2 mm to 0.8 mm. Further, the chuck piece 36 is provided so as to come into contact with the region 22 of the shutter 20 shown in FIG. 1 excluding the opening 21. As the sponge rubber 37, a silicone rubber having a hardness of 15 degrees or less and having excellent flexibility and heat resistance is used.

The suction unit moves the suction plate 41 by a predetermined amount toward the shutter 20 whose position is regulated in the horizontal direction in the figure, and contacts the back surface of the shutter. This is done by moving the whole to the mold 70 side. More specifically, the suction unit 41 has a pipe 42 connected to a vacuum pump (not shown) connected to the suction plate 41 behind the suction plate 41. The pipe 42 is provided on the inner surface of the top plate of the support frame 30. The suction base 41 is arranged at a predetermined position by passing through the fixed base portion 43 and extending into the support body. Further, the pipe 42 has a compression spring 44 arranged between the suction plate 41 and the base 43. The compression spring 44 can properly absorb the impact when the suction plate 41 descends by a predetermined amount and comes into contact with the back surface of the shutter. Further, the vacuum pump can blow air from the suction plate 41 by reversing the operation thereof. An appropriate drive system may be provided at the location of the base portion 43, and the suction plate 41 may be configured to be moved only by a predetermined signal. Further, although the molded product take-out device 40 has a structure in which one shutter is held in FIG. 2, when the shutter 20 is, for example, a four-piece or eight-piece mold, the number of the shutters is naturally limited. It is a structure according to.

In the molded product take-out device 40 configured as described above, after the shutter 20 is injection-molded in the mold, the mold is opened, and then the support frame 30 is immediately opened between the molds. Move to. Then, when the shutter 20 is slightly projected onto the mold 70 by the protruding pin 61, the air cylinder 35 operates to move the chuck piece 36 (moving in the B direction) to the both side surfaces of the shutter 20. Lightly abut. As a result, the shutter 20 is positionally regulated at a predetermined position, and is supported by the chuck piece 36 in an auxiliary manner. On the other hand, the entire device 40 further moves in the D direction. As a result, the suction plate 41 comes into contact with the back surface of the shutter. Further, unlike the illustration, when only the suction plate 41 can be operated, the suction plate 41 is lowered by a predetermined amount at the same time when the chuck piece 36 is brought into contact with the back surface of the shutter 20.

When the suction plate 41 moves, the suction plate 41 is lowered while blowing out air, and contacts the back surface of the shutter while cooling the back surface of the shutter. As a result, the shutter 20 is hardened. Immediately before the contact, the suction plate 41 this time operates so that the vacuum pump sucks air to reduce the pressure in the pipe 42 and airtightly contact the rear surface of the shutter. As a result, when the suction plate 41 sucks the shutter 20, the support frame 30 moves away from the mold 70 (in the direction of arrow C), and the shutter 20 is taken out of the mold 70. For example, move horizontally and transfer to the next process. In the take-out device 40 that has moved to the next step, the chuck piece 36 and the suction plate 41 operate in the reverse operation of the take-out process to open the shutter 20.

That is, according to the above-described embodiment, the pair of chuck members 33 are lightly abutted from both sides of the shutter 20, and the distance between the chuck piece 36 and the facing piece when the chuck piece 36 is closed is set to the thickness of the shutter 20. The distance is set to a minute distance of 0.2 mm to 0.8 mm, and the sponge rubber 37 is attached to the chuck surface of the shutter 20 to regulate the position of the shutter 20 at a predetermined position without damaging the side surface thereof. In addition, the shutter 20 can be supplementarily supported. On the other hand, since the suction plate 41 comes into contact with the back surface of the shutter 20, reliable suction can be performed under accurate position regulation. In addition, since the sponge rubber 37 is made of a silicone-based rubber that is flexible and has excellent heat resistance, it can be used as a molded product immediately after molding that is easily deformed at high temperatures. Furthermore, since the chuck piece 36 is in contact with the area 22 avoiding the opening 21, the chuck piece 36 can minimize the influence even if the chuck piece 36 is deformed.

[0015]

[Effect of the device]

 As described above, the present invention has a structure provided with a chuck member for side-chucking the molded product as an auxiliary and a suction unit for sucking the molded product on the back side. Therefore, since a pair of chuck members are lightly contacted and positioned, it is possible to position-regulate the vicinity of the suction part without damaging the molded product by this chuck, and the suction-holding by the suction plate in this position-controlled state. As a result, accurate adsorption can be achieved even with light contact. That is, by the construction in which the molded product is taken out from the mold by the interaction between the chuck and the suction, it is possible to prevent the deformation of the molded product that has occurred in the conventional apparatus to which each of the above means is applied independently. Further, in the present invention, since the suction plate works at the position where the chuck member holds and regulates, the molded product can be accurately sucked and the suction error can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a shutter to which the device of the present invention is applied.

FIG. 2 is a partial sectional front view of the molded product take-out device of the present invention.

3 is an overall configuration diagram of a 3.5-inch microfloppy disc to which the shutter of FIG. 1 is attached.

FIG. 4 is a schematic view showing a holding state by a side chuck in a conventional device.

FIG. 5 is a schematic diagram for explaining a state of back surface adsorption in a conventional device.

[Explanation of symbols]

 20 Shutter 30 Support Frame 31 Opposing Wall 32 Top Plate Wall 33 Chuck Member 34 Piston Rod 35 Air Cylinder 36 Chuck Piece 37 Sponge Rubber (Elastic Member) 40 Mold Extractor 41 Adsorption Board 42 Pipe 43 Base 44 Compression Spring

Claims (1)

[Scope of utility model registration request] 1. A molded product take-out device for taking out an injection-molded molded product from a molding die, the elastic member being fixed to a movable support frame and having a tip end from both side surfaces of the molded product having a U-shaped cross section. And a pair of chuck members for abutting against each other to sandwich the molded product and regulate the position of the molded product at a predetermined position, and the chuck that is elastically movable to the support frame in a direction orthogonal to the chuck member. A suction plate that comes into contact with the back surface of the molded product whose position is regulated by a member and adsorbs the molded product on the back surface, and holds the molded product partially exposed from the molding die by the chuck member. A molded product take-out device that sucks the back face with the suction plate and takes out the molded product from an injection mold by moving the support frame.