JP2007216400A - Gate shutting processing apparatus of molding and gate cutting quality discriminating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To discriminate the quality of a product part on the basis of the displacement of suction when the product part where a gate is cut is sucked and held, and to miniaturize a gate cutting processing apparatus itself while shortening the gate cutting processing time of a molding to enhance gate cutting efficiency because it is unnecessary to provide an inspection station for discriminating gate cutting quality between a gate cutting region and a product part housing region. <P>SOLUTION: In the gate shutting processing apparatus of the molding, the product part obtained from the resin molding by gate cutting is sucked and held by the sucking and holding part connected to a negative pressure generator. A planar part, which has a size coinciding with the size of the product part obtained by gate cutting and communicates with a hollow part at its center part, and a tapered sucking recessed part, wherein the peripheral wall surface of the planar part is gradually expanded toward its leading end, are provided to the sucking and holding member on its sucking side. A detection member 57 for detecting the displacement in the passage, which connects the sucking and holding member and the negative pressure generator, is provided to the passage and, when the product part after gate cutting is sucked by the sucking recessed part of the sucking and holding member, the quality of the gate cutting can be discriminated based on the displacement detected by the detection member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a molded product gate cutting that has a function of determining whether the gate cutting is good or not when a product part that has been gate cut from a minute molded product, such as a resin lens, is stored in a pallet or the like. The present invention relates to a processing apparatus and a gate cutting pass / fail judgment method.

  As shown in Patent Document 1, loading means for loading and positioning a plastic workpiece formed in a state where a plurality of product main bodies are connected by a runner, and orthogonal to the X axis, Y axis, and Z axis A laser processing machine that has three axes of freedom and detaches each product body from the gate by irradiating a plastic workpiece with a laser beam, and each product body after gate cutting is stored in the same storage direction. Storage means for aligning and storing in the tray, each product body after gate cutting is inspected and sorted into good and defective products, TV camera that captures each product body as an image, and processing the image signal from the TV camera There has been proposed a plastic work processing apparatus comprising a detection means having a signal processing means for discriminating between good and bad.

This processing apparatus images a product part that has been gate-cut with a camera, and determines whether or not the product part has been gate-cut in a desired state based on the image data. However, in order to judge the quality of the product part from the image, it is necessary to provide an inspection station in which a camera and a monitor are arranged between the gate cutting area and the storage area, and there is a problem that the processing apparatus itself becomes large. Yes. In particular, in the product part such as a resin lens, the product part itself is minute and transparent. Therefore, in order to obtain correct image data of the product part, a high-resolution camera and a monitor are provided. It is necessary to perform brightness adjustment and contrast adjustment with high accuracy, and there is a problem that inspection processing becomes complicated and inspection work takes time.
Japanese Patent No. 3437261

The problem to be solved is that it is necessary to provide an inspection station between the gate cutting area and the storage area, and the processing apparatus itself is increased in size and cost. Since the image data of the product part is used as an inspection device, in order to obtain accurate image data of the product part, it is necessary to perform a brightness adjustment and a contrast adjustment with a high precision as well as a high precision camera device. The image processing is complicated and the processing apparatus itself is expensive. In particular, it is difficult to obtain clear image data when the product portion is minute and the resin lens is transparent.

The molded product gate cutting processing apparatus according to claim 1, wherein the molded product gate cutting processing device holds the product part gate-cut from the resin molded product by suction holding member connected to the negative pressure generating device. On the suction side, a flat suction part having a size corresponding to the gate-cut product part and a hollow part communicating with the center part and a peripheral wall surface of the flat part gradually expands toward the tip. And a detection member that detects displacement in the passage is connected to the passage connecting the suction holding member and the negative pressure generator, and is detected when the product portion after gate cutting is sucked into the suction recess of the suction holding member. It is possible to determine whether the gate cutting is good or not based on the displacement detected by the member.

The molded product gate cutting apparatus according to claim 2, after the gate portion of the product portion in the resin molded product held by the product holding member is cut by the gate cutting blade and separated into the product portion and the sprue portion, the negative pressure generating device In the molded product gate cutting processing device that sucks the product part after gate cutting held by the product holding member by the suction holding member connected to the product and takes it out to a required place, the suction side of the suction holding member is gate-cut. A flat portion with a hollow portion communicating with the center portion and a tapered suction concave portion in which the peripheral wall surface of the flat portion gradually expands toward the tip, and the suction holding member. A detection member for detecting the displacement in the passage is provided in the passage connecting the negative pressure generator and the displacement detected by the detection member when the product part after the gate is cut is sucked into the suction recess of the suction holding member. Base There wherein the acceptability of the gate cut allowed discriminated.

The molded product gate cutting apparatus according to claim 3 is a product holding member having a holding recess having a shape substantially coinciding with a product portion of a resin molded product, and a cutter supported so as to be movable in a direction approaching and moving away from the holding recess. An attachment base, a blade operating member for moving the blade attachment base, a gate cutting blade attached to the blade attachment base so that the blade edge coincides with the gate portion of the product portion held in the holding recess, and a gate When the gate cutting blade moves toward the part, the separation member moves the positioning member that regulates the movement of the gate cutting blade and the product holding member in the direction in which the product part held in the holding recess moves away from the sprue part. In a molded product gate cutting apparatus having a member and a gripping member that grips a resin molded product and holds the product portion in the holding recess, the base end portion is supported by the product holding member and the holding recess is A blade receiving member provided with a positioning portion for turning the gate cutting blade and a blade receiving portion positioned at the gate portion of the resin molded product and rotating at the leading end and closing direction; and a product holding member The blade receiving member always urges the blade receiving member toward the open side, and when the product portion is held in the holding recess, the blade contacts the blade receiving member and resists the elastic force of the elastic member. A flat surface portion that includes a pressing member that rotates so that the receiving portion is positioned at the gate portion, and that has a size that matches the gate-cut product portion on the suction side of the suction holding member and that communicates with the hollow portion at the center portion In addition, a taper-shaped suction concave portion in which the peripheral wall surface of the flat portion gradually expands toward the tip is provided, and a detection member for detecting the displacement in the passage is provided in the passage connecting the suction holding member and the negative pressure generator. The gate to the suction recess of the suction holding member When sucking the product portion after disconnection, characterized in that the quality of the gate cut was distinguishable on the basis of the displacement detected by the detection member.

5. The molded product gate cutting apparatus according to claim 4, wherein the product holding member has a holding recess having a shape substantially coinciding with the product portion of the resin molded product, and a blade supported so as to be movable toward and away from the holding recess. An attachment base, a blade operating member that moves the blade attachment base, a gate cutting blade that is attached to the blade attachment base so that the blade edge coincides with the gate portion of the product portion held in the holding recess, and a product Molded product gate in which a plurality of molded product holding and cutting units, which are integrally provided with separation operation members that move the holding member in the direction in which the product part held in the holding recess moves away from the sprue part, are arranged at equiangular positions at a concentric position In the cutting device, the base end portion is supported with respect to the product holding member of each molded product holding and cutting unit, and rotates in the direction to open and close the holding recess, and the resin molded product to the distal end portion. A blade receiving member provided with a blade receiving portion positioned at the gate portion and a positioning portion for restricting the movement of the gate cutting blade; and an elastic member that constantly biases the blade receiving member toward the open side with respect to the product holding member; A pressing member that rotates when the product portion is held in the holding recess and rotates so that the blade receiving portion is positioned at the gate portion against the elastic force of the elastic member by contacting the blade receiving member; On the suction side of the holding member, a taper shape having a size that matches the gate-cut product part, and a flat part that communicates with the hollow part at the center part and the peripheral wall surface of the flat part gradually expands toward the tip. When a suction member is provided and a detection member for detecting the displacement in the passage is provided in the passage connecting the suction holding member and the negative pressure generating device, the product portion after cutting the gate is sucked into the suction recess of the suction holding member. Based on the displacement detected by the sensing member There wherein the acceptability of the gate cut allowed discriminated.

The gate cutting quality determination method according to claim 7 is a molded product gate cutting process in which a product portion that has been gate-cut from a resin molded product is sucked and held by a suction holding member connected to a negative pressure generator. In the method, the quality of the gate cutting is determined based on the suction displacement when the product portion is sucked by the suction holding member.

According to the method for determining whether or not the gate cutting is good, the product part of the resin molded product held by the holding member is held in the holding recess of the product holding member, and then the gate cutting blade is moved toward the gate part of the product part. After cutting the gate, and then moving the product holding member away from the sprue and separating the product from the sprue, the molded product gate cutting process is carried out by holding the product part in the holding recess with the product takeout member In the method, when the product portion is gate-cut, the blade receiving member that is rotatably supported by the product holding member is pressed against the elastic force of the elastic member by the pressing member that moves together with the gripping member to hold the concave portion. And closing the blade receiving portion at the gate portion of the product portion in the holding recess, and after the gate cutting, the contact of the pressing member with the blade receiving member is released along with the movement of the product holding member. And a step of rotating the holding recess by the elastic force of the elastic member, and a step of determining whether the gate cutting is good or not based on the suction displacement when the product portion is sucked to the suction holding member. It is characterized by that.

  According to the present invention, when the gate-cut product part is sucked and held, the quality of the product part can be determined based on the suction displacement, and the apparatus itself can be reduced in size and cost. In addition, since it is not necessary to provide an inspection station for determining the quality of gate cutting between the gate cutting area and the product area, the apparatus itself can be miniaturized and the gate cutting time of the molded product can be shortened. Efficiency.

According to the present invention, when the product part that has been gate-cut by the suction-holding member is sucked, the best mode is to determine whether the product part is gate-cut based on the displacement of suction.

The present invention will be described below with reference to the drawings showing embodiments.
In FIG. 1, a product housing area A and a gate cutting area B are set in the main body frame 3 of the molded product gate cutting processing apparatus 1, and a length extending over the product housing area A and the gate cutting area B is set on the side edge of the main body frame 3. The first traveling frame 5 is attached. A first traveling body 7 is supported on the first traveling frame 5 so as to be capable of reciprocating in the longitudinal direction. Further, a base end portion of a second traveling frame 9 extending in a direction perpendicular to the longitudinal direction of the first traveling frame 5 is fixed to the first traveling body 7, and the second traveling frame 9 is fixed to the second traveling body 9. 11 is supported so as to be capable of reciprocating in the longitudinal direction of the second traveling frame 9.

  The first and second traveling bodies 7 and 11 are configured such that a numerically controllable electric motor 13 or 15 such as a servo motor is connected to a conventionally known feed screw drive mechanism or a linear drive mechanism (not shown) such as a belt drive mechanism. And are reciprocated in the respective directions as the electric motors 13 and 15 are driven. The electric motors 13 and 15 may be linear servo motors.

  As shown in FIGS. 2 to 4, the second traveling body 11 is provided with a standing frame 17, and a lifting body 21 is supported on the standing frame 17 so as to be reciprocally movable in the vertical direction. The elevating body 21 is moved in the vertical direction in accordance with driving of an electric motor 23 such as a connected numerically controllable servo motor.

  A holding pressing means 27 and a product take-out means 29 are provided adjacent to the mounting plate 25 fixed to the elevating body 21. A rotation member 35 such as a rotary actuator is fixed to the mounting frame 31 of the holding and pressing means 27, and a gripping operation member 33 such as an air cylinder having an axis in the vertical direction is connected to the rotation shaft of the rotation member 35. ing. The gripping operation member 33 is provided with a gripping claw 33a at the lower portion shown in the figure, and grips or releases the sprue portion 37b of the resin molded product 37 by an opening / closing operation associated with the operation of the gripping operation member 33.

In addition, the gripping operation member 33 is reciprocally rotated at a required angle, in this example, an angle of 45 degrees in accordance with the operation of the rotation member 35. This rotation angle is appropriately set based on the number of product parts 37a in the resin molded product 37 and the number of molded product holding and cutting units 61 that simultaneously perform gate cutting as will be described later. In the resin molded product 37 of this example, the product portions 37a are integrally formed at the tips of eight sprue portions 37b extending in the radial direction at equal angles, but the present invention is not limited to this.

  In addition, on the lower surface of the attachment frame 31, four pressing members 39 hanging down at a required length in this example are attached at an equal angle with respect to the circumferential direction. A rotating body 41 is pivotally supported at the lower part of each pressing member 39 so as to be rotatable in the radial direction of an arc assumed to connect the pressing members 39.

On the other hand, the upper and lower frames 43 of the product take-out means 29 are, in this example, four that hang down at a required length at equal intervals with respect to the circumferential direction. Supported to move. Each vertical moving body 45 is connected to a vertical movement member 47 such as an air cylinder having a base end fixed to the vertical frame 43 and is moved in the vertical direction by a required stroke. Under each vertical moving body 45, suction holding members 51 connected to a negative pressure generating device 49 (vacuum generating device, not shown in FIGS. 2 to 4) coincide with holding recesses 75a described later. The product part 37a provided and gate-cut is adsorbed.

As shown in a partially enlarged view in FIG. 4, each suction holding member 51 is composed of a pipe-shaped shaft member having a diameter larger than the outer diameter of the product portion 37a, and has a smaller diameter than the outer diameter of the product portion 37a at the center. The hollow portion 51a extends in the axial direction. Further, an adsorption recess 51c having a flat portion 51b communicating with the hollow portion 51a at the center portion with an inner diameter substantially coincident with the outer diameter of the product portion 37a on the product portion adsorption side (lower portion in the drawing) of each adsorption holding member 51. Is formed, and the inner peripheral wall surface of the suction recess 51 c is formed in a taper shape whose inner diameter gradually increases toward the tip of the suction holding member 51.

Further, as shown in FIG. 5, each suction holding member 51 is connected to the negative pressure generator 49 described above by a connection pipe 55 provided with an opening / closing valve 53. A detection member 57 such as a bellows or a diaphragm for detecting a change in internal pressure is attached to a part of the connection pipe 55. Each suction holding member 51 is individually sucked and released by the respective opening and closing valves 53.

For example, a square opening 59 is formed in the gate cutting area B of the main body frame 3, and four molded product holding and cutting units 61 are concentric on the main body frame 3 corresponding to each side of the opening 59. It is fixed so that the position can be adjusted while facing each other at the division position. A push-up operation member 63 such as an air cylinder is fixed to the main body frame 3 below the opening 59, and a push-up plate 65 is fixed to the operation shaft of the push-up operation member 63. The push-up plate 65 is brought into contact with the lower part of the blade mounting base 81 of each molded product holding and cutting unit 61 described later by the operation of the push-up operation member 63 and is pushed up with a required stroke.
Note that a buffer member (not shown) may be attached to the push-up plate 65, and the push-up plate 65 may be moved at a slow speed in accordance with the operation of the push-up operation member 63.

  As shown in FIGS. 6 to 9, the linear guide member extending in the direction toward the center of the arc assumed to connect each molded product holding / cutting unit 61 to the fixed base 67 of each molded product holding / cutting unit 61 described above. 69 is fixed, and a movable base 71 having an L-shaped side surface is movably supported by each linear guide member 69. A separation operation member 73 such as an air cylinder having a main body fixed to the movable table 71 and an operation shaft fixed to a part of the fixed table 67 is attached to each movable table 71. The movable base 71 is reciprocated in the radial direction.

  A product holding member 75 is fixed to the upper surface of the upright portion of each movable base 71 so as to be replaceable. Each product holding member 75 is provided with a holding concave portion 75a having a shape that substantially coincides with the product portion 37a and is cut out on the gate portion 37c side. At the intermediate portion of each product holding member 75, the base end portion of the blade receiving member 77 is rotatably supported so as to open and close the holding recess 75a. A blade receiving portion 77a having a surface coinciding with the leading end lower surface of the holding recess 75a when rotated to a position covering the holding recess 75a is provided at the tip of each blade receiving member 77. Each blade receiving member 77 always urges the holding recess 75a to the open side by an elastic member 79 such as a wire spring mounted on a shaft 75b that rotatably supports the blade receiving member 77 with respect to the product holding member 75.

In addition, as the product holding member 75, a plurality of types of holding recesses 75a are prepared according to the shape and size of the product portion 37a of various resin molded products 37, and the resin molded product to be gate-cut. The product holding member 75 corresponding to 37 may be replaced.

Further, a cutter mounting base 81 (described later) is supported on the side of the upright portion of each movable base 71 so as to be movable in the vertical direction. A gate cutting blade 83 is provided above each of the cutter mounting bases 81 and the cutting edge is a product holding member 75. It is fixed so as to be in sliding contact with the side surface. Each gate cutting blade 83 is integrally provided with a contact portion 83a as a positioning member on both sides of the blade edge, and when the gate cutting blade 83 is moved to the gate cutting position, the contact portion 83a becomes the lower surface of the blade receiving portion 77a. The gate cutting blade 83 is received in contact with the blade and excessively raised.

Each gate cutting blade 83 is heated to a required temperature by a built-in heating member such as an electric heater (not shown), and when the product portion 37a and the sprue portion 37b of the resin molded product 37 are gate-cut, the gate portion 37c. By cutting while heating and softening, the internal stress in the gate portion 37c is dispersed to smooth the cut surface.

  A shaft portion 85a of the operating piece 85 is supported at the lower portion of each blade mounting base 81 so as to be movable in the vertical direction along the long groove 81a. The operating piece 85 is a compression attached between the long groove 81a and the shaft portion 85a. The elastic member 86 such as a spring is always urged downward.

  As shown in FIG. 1, the gate cutting area B of the main body frame 3 has four discharge openings 89 connected to a discharge shooter 87 for discharging the sprue portion 37b from which the product portion 37a has been cut out of the apparatus. The molded product holding and cutting unit 61 is provided in the vicinity. Further, the main body frame 3 in the product storage area A has a plurality of, in this example, eight product storage pallets 91 and one defective product, each having a number of sections for individually storing the gate-cut product portions 37a. A collection pallet 93 is placed.

Next, the gate cutting action of the resin molded product 37 and the product part quality determination method will be described.
First, the gate cutting action of the resin molded product 37 and the accommodating action of the product portion 37a will be described. The electric motors 13 and 15 and, if necessary, the electric motor 23 are driven and controlled, and the first and second traveling bodies 7, 11 and After the elevating body 21 is moved so that the holding and pressing means 27 and the product taking-out means 29 are positioned on the molded product supply device side (not shown) of the gate cutting area B, the gripping claw 33a is moved by the gripping operation member 33 that operates. The sprue part 37b of the resin molded product 37 to be gate-cut by the closing operation is gripped.

Next, similarly to the above, the electric motors 13 and 15 and, if necessary, the electric motor 23 are respectively driven and controlled, and the lifting body 21 is alternated between the product parts 37a in the resin molded product 37 held by the holding claws 33a. However, after the product holding member 75 is moved so as to be positioned above the holding recess 75a, the electric motor 23 is driven and controlled to move the lifting body 21 downward so that every other product portion 37a is placed in the holding recess 75a. Are engaged and held respectively. (See FIGS. 10 and 11)

At that time, the gripping claws 33a release the gripping of the sprue portion 37b at the timing when the product portion 37a passes the tip of the blade receiving member 77 rotated to the open side, and drops the product portion 37a into the holding recess 75a. Just do it.

Further, when the electric motor 23 is driven and controlled to move the elevating body 21 downward, the pressing member 39 that moves downward together with the elevating body 21 comes into contact with the upper surface of the blade receiving member 77 rotated to the open side and is elastic. The member 79 is rotated against the elastic force of the member 79 toward the closing side. Thus, the product portion 37a in the holding recess 75a is held by the blade receiving member 77 rotated to the closing side, and the blade receiving portion 77a is a gate that is a boundary between the product portion 37a and the sprue portion 37b in the holding recess 75a. It is located in a state close to the upper part of the portion 37c. (See Figure 12)

Next, the push-up plate 65 is moved upward with a required stroke by the operating member 63 that operates in the above state, and the blade mounting base 81 is moved upward with the required stroke. As a result, the gate cutting blade 83 is moved upward to cut the gate portion 37c to separate the product portion 37a from the sprue portion 37b. (See FIGS. 13 and 14)
After the gate of the gate portion 37c is cut, the operating member 63 is moved back to move the push-up plate 65 downward to lower the gate cutting blade 83.

Next, the separation operation member 73 is operated at the timing when the gate cutting is completed or slightly earlier before the gate cutting is completed, and the product holding member 75 is moved away from the sprue portion 37b by the product portion 37a in the holding recess 75a. It moves in the direction and is completely separated from the sprue portion 37b. At this time, the pressing member 39 is pressed against the upper surface of the blade receiving member 77, but the rotating body 41 rotates with the movement of the product holding member 75, thereby enabling movement under the pressing state. When the pressing member 39 is released from the upper surface of the blade receiving member 77 as the product holding member 75 moves in the radial direction, the blade receiving member 77 is rotated to the open side by the elastic force of the elastic member 79. The product recess 37a can be removed by opening the upper surface of the holding recess 75a. (See Figure 15)

When the product holding member 75 is moved to the required radial position, the gripping operation member 33 is operated to grip the sprue portion 37b of the resin molded product 37 in which a part of the product portion 37a is gate-cut by the gripping claws 33a. After that, the electric motor 23 is driven to move the elevating body 21 upward to separate the resin molded product 37 from the respective molded product holding and cutting units 61.

Next, when the elevating body 21 is moved to the raised position, the electric motors 13 and 15 and, if necessary, the electric motor 23 are driven to move the elevating body 21 and the respective suction holding members 51 are moved in the radial direction. The holding member 75 is moved so as to be positioned above the holding recess 75a, and then the electric motor 23 is driven to move the elevating body 21 downward, and the vertical operation member 47 is operated as necessary to hold each suction and holding. The member 51 is adsorbed close to the product part 37a whose gate is cut in the corresponding holding recess 75a. Next, the elevating body 21 is raised and the vertical operation members 47 are moved back as necessary to move the respective suction holding members 51 upward to take out the product portion 37a from the holding recess 75a. (See Figure 16)
In addition, when moving the raising / lowering body 21 upward, the separation operation member 73 is moved back to return the product holding member 75 to its original position.

After the above operation, the electric motors 13, 15, and 23 are respectively driven to move the elevating body 21 to the product storage area A side, and each suction holding member 51 is positioned in a required section in the product storage pallet 91. The electric motor 23 is driven, and the vertical operation member 47 is operated as necessary to accommodate the product portions 37a sucked and held by the suction holding members 51 in the respective sections. (See Figure 17)

In addition, as a mode of storing the product portion 37 a in each section of each product storage pallet 91, all the product sections 37 a respectively held by the respective suction holding members 51 are simultaneously stored in each section of one product storage pallet 91. Either the aspect to accommodate or the aspect to accommodate the product part 37a hold | maintained in each adsorption | suction holding member 51 with respect to the inside of the division of each product accommodation pallet 91 by carrying out movement control of the raising / lowering body 21 may be sufficient.

Next, after the electric motor 23 is driven to move the elevating body 21 upward and the vertical operation member 47 is moved back as necessary to return the suction holding members 51 upward, the electric motors 13, 15 and If necessary, the electric motor 23 is driven to move the elevating body 21 so that each pressing member 39 is positioned above the blade receiving member 77 of the corresponding molded product holding and cutting unit 61. During the movement of the elevating body 21 or after the elevating body 21 is moved to the above-described required position, the gripping member 33 is rotated at a required angle by operating the rotation member 35 and is gripped by the gripping claws 33a. The resin molded product 37 is moved so that the remaining four product parts 37a that are not gate-cut are opposed to the respective holding recesses 75a. (See Figure 18)

Next, after the electric motor 23 is driven to move the elevating body 21 so that the product portion 37a is positioned in the holding recess 75a, the remaining product portion 37a is gated and held in the same manner as described above. The product part 37a whose gate is cut is adsorbed to the member 51. When all the product portions 37a are gate-cut from the sprue portion 37b, the gripping member 33 is actuated to grip the sprue portion 37b by the gripping claws 33a, and then the electric motor 23 and the electric motors 13 and 15 are driven to sprue. After the portion 37b is moved above the discharge opening 89, the gripping operating member 33 is moved back to release the gripping of the sprue 37b by the gripping claws 33a and dropped onto the discharge shooter 87, thereby discharging the device outside the apparatus. Let

Next, the electric motors 13 and 15 and, if necessary, the electric motor 23 are driven to move the elevating body 21 to the product storage area A side, so that each suction holding member 51 is positioned in a required section in the product storage pallet 91. After that, the electric motor 23 is driven, and the vertical operation member 47 is operated as necessary to store the product portions 37a sucked and held by the suction holding members 51 in the respective sections of the product storage pallet 91.

Next, the gate cutting pass / fail determination operation for determining whether or not the product portion 37a has been gate-cut in the normal state when the gate-cut product portion 37a is sucked to the suction holding member 51 will be described.

The gate-cut product part 37a has a required outer diameter in a plane and a truncated circular shape with a part cut out, and a part of the gate part 37c protrudes in the radial direction at the wharf location. Yes. Now, when the product part 37a is gate-cut in the normal state, the cut end of the gate part 37c left uncut as shown in FIG. It is the length located in an outer diameter line (it shows with a dashed-dotted line). On the other hand, when the cutting of the gate portion 37c is defective, as shown in FIG. 19B, the cut end of the gate portion 37c left uncut is from the outer diameter line of the product portion 37a assumed at the wharf location. The length is projected in the radial direction.

When the product portion 37a gate-cut at the regular length is sucked and held by the suction holding member 51, the entire product portion 37a including the gate portion 37c is flat with respect to the suction recess 51c as shown in FIG. The hollow portion 51a is almost completely blocked by coming into contact with 51b. As a result, the negative pressure in the connection pipe 55 becomes equal to or higher than a predetermined value, and the detection member 57 detects the negative pressure higher than the predetermined value and outputs a detection signal, thereby determining that the product portion 37a has been gate-cut in the normal state. To do.

On the other hand, when the gate cutting state of the product part 37a sucked and held by the suction holding member 51 is defective, the outer diameter of the product part 37a including the gate part 37c is larger than the size of the flat part 51b. As shown in FIG. 21, the cut end of the gate portion 37c hits the tapered inner peripheral wall surface with respect to the suction recess 51c and is sucked in a state where a slight gap is formed between the flat portion 51b.

As a result, the hollow portion 51a cannot be almost completely blocked by the product portion 37a, and air flows in so that the negative pressure in the connection pipe 55 does not exceed a predetermined value, and therefore no detection signal is output from the detection member 57. become. Thereby, it is determined that the gate cut state of the product portion 37a sucked and held by the suction holding member 51 is defective.

In addition, an inverting circuit (not shown) is provided in the determination circuit for the signal from the detection member 57, and when the detection member 57 outputs a signal, a LOW signal is output, and conversely, when the detection member 57 does not output a signal, A high signal may be output.

When it is determined that the gate cutting state of the product portion 37a sucked and held by the suction holding member 51 is defective based on the signal from the detection member 57, the non-defective product portion 37a is stored in each product storage pallet. The product portion 37a by the suction holding member 51 is moved after the holding and pressing means 27 is moved onto the defective product collection pallet 93 by controlling the driving of the electric motors 13 and 15 and the electric motor 23 as necessary before or after the storage. Is removed and collected in the defective product collection pallet 93.

  In this embodiment, when the gate-cut product part 37a is sucked and held by the suction holding member 51, whether the gate cut state of the gate part 37c is a normal state based on the negative pressure that sucks the product part 37a. It is possible to determine whether the state is abnormal. For this reason, it is not necessary to provide an inspection station for discriminating the quality of the gate cutting state between the gate cutting area and the product housing area as in the prior art, and the apparatus itself can be simplified and miniaturized and the inspection can be performed efficiently. Can be executed.

The present invention can be modified as follows.
1. The above description determines that the gate portion 37c of the product portion 37a adsorbed to the adsorption holding member 51 is gate-cut in a normal state when the negative pressure in the connection pipe 55 is greater than or equal to a predetermined value by the detection member 57. Although the configuration and method are adopted, the flow rate of air in the connection pipe is detected by the detection member, and when the flow rate of air is below a predetermined amount when the product portion is adsorbed by the adsorption holding member, the gate portion of the product portion is in a normal state. A configuration and a method for determining that the gate is disconnected may be employed.

2. In the above description, when the product portion 37a after cutting the gate adsorbed by the suction holding member 51 is determined as a defective product, the defective product portion is accommodated in the defective product collection pallet 93. In such a resin lens or the like, the cause of defective gate cutting is often the mold itself. For this reason, when the adsorbed product part is determined to be defective, the operation of the molded product gate cutting apparatus itself is temporarily interrupted and the warning means such as a buzzer and a lamp are driven to give the product to the worker. You may make it alert | report that it is a defect of a part and to inspect a metal mold | die.
Further, when the product part is defective, it may be dropped together with the sprue onto the discharge shooter 87 and discharged out of the apparatus without being collected on the defective product collection pallet 93.

3. In the above description, the push plate 59 is moved upward to simultaneously push up the blade mounting base 81 of each molded product holding and cutting unit 61 and simultaneously cut the gate portion 37c with the gate cutting blade 83. Each blade mounting base 81 is pushed up individually or synchronously by an operating member (not shown) such as an air cylinder provided on the movable base 71 of each molded product holding and cutting unit 61 to gate-cut the gate portion 37c. The structure and method to perform may be sufficient.

4). In the resin molded product 37 described above, the product portions 37a are integrally formed at the tips of the eight sprue portions 37b extending in the radial direction. However, the sprue portion 37b has an annular shape on the outer peripheral side. An even number, preferably four or more product portions 37a may be integrally formed at equal intervals.

5. In the above description, since the eight product parts 37a provided in the resin molded product 37 are gate-cut by two operations, the four molded product holding and cutting units 61 are laid out. Alternatively, the number of molded product holding and cutting units 61 corresponding to the number of product parts 37a may be laid out and gates may be cut by one operation. Further, when the gate is cut by two operations, the number of product parts 37a may be at least an even number of four or more.

6). In the above description, the holding and pressing means 27 and the product taking-out means 29 are provided adjacent to the mounting plate 25 of the elevating body 21, and the holding and pressing means 27 is attached to the molded product holding and cutting unit 61 when the resin molded product 37 is gate-cut. Further, when the product part 37a that has been gate-cut is taken out, the product take-out means 29 is controlled to move with respect to the molded product holding / cutting unit 61. However, as shown in FIG. Separately, the upper and lower frames 43 of the product take-out means 29 rotatably support the rotary plate 101 fixed at equal intervals between the pressing member 39 and the pressing member 39, and the rotary plate 101 has a rotary actuator. And a rotating recess 103a of the product holding member 75 in each molded product holding and cutting unit 61. Configured to selectively position the pressing member 39 and the suction holding member 51 against.

It is a whole perspective view which shows the outline of a molded article gate cutting processing apparatus. It is a perspective view which expands and shows a holding | maintenance press means and a product taking-out means. It is a substantial body center longitudinal cross-sectional view of a holding | maintenance press means. It is an approximate body center sectional view of a product taking-out means. It is explanatory drawing which shows the connection state of an adsorption holding member and a negative pressure generator. It is a perspective view which expands and shows a molded article holding | maintenance cutting unit part. It is a side view of a molded article holding | maintenance cutting unit. It is an approximate body center sectional view of a molded article holding cutting unit. It is an expansion perspective view of a product holding member location. It is a top view which shows the supply state of the resin molded product with respect to a molded product holding | maintenance cutting unit part. It is a fragmentary sectional view which shows the holding state of a product part. It is explanatory drawing which shows the state which rotated the blade receiving member to the closing side. It is explanatory drawing which shows a gate cutting state. It is explanatory drawing which shows the contact state of the gate cutting blade and the blade receiving part at the time of gate cutting. It is explanatory drawing which shows the forced separation state of a product part. It is explanatory drawing which shows the adsorption | suction holding | maintenance and taking-out state of a product part. It is explanatory drawing which shows the state which accommodates a product part in a product accommodation pallet. It is explanatory drawing which shows the state which rotated the remaining product parts to the gate cutting position. A is an explanatory view showing a product part in which the gate is normally cut, and B is an explanatory view showing a product part in which the gate cut is defective. It is explanatory drawing which shows the adsorption | suction holding state of the product part normally gate-cut. It is explanatory drawing at the time of adsorb | sucking the product part with a bad gate cutting | disconnection. It is explanatory drawing which shows the change Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Molded product gate cutting processing device 27 Holding | pressing press means 29 Product taking-out means 37 Resin molded product 37a Product part 37b Sprue part 37c Gate part 39 Pressing member 49 Negative pressure generator 51 Adsorption holding member 51a Hollow part 51b Plane part 51c Adsorption recessed part 57 Detection member 61 Molded product holding and cutting unit 73 Separation actuating member 75 Product holding member 75a Holding recess 77 Blade receiving member 77a Blade receiving portion 83 Gate cutting blade

Claims (11)

In the molded product gate cutting processing device that holds the product part that is gate-cut from the resin molded product by the suction holding member connected to the negative pressure generator, the product part that is gate-cut on the suction side of the suction holding member And a suction part having a tapered shape in which the peripheral wall surface of the flat part gradually expands toward the tip, and the suction holding member and the negative pressure generating device. A detection member for detecting the displacement in the passage is provided in the passage connecting the gate, and when the product portion after gate cutting is sucked into the suction recess of the suction holding member, the gate cutting is performed based on the displacement detected by the detection member. Molded product gate cutting processing device that makes it possible to determine pass / fail. After the gate part of the product part in the resin molded product held by the product holding member is cut by the gate cutting blade and separated into the product part and the sprue part, the product holding member is connected to the negative pressure generator by the suction holding member. In the molded product gate cutting processing device that picks up the held product part after cutting the gate and takes it out to the required location, the suction side of the suction holding member has a central part with a size that matches the product part that has been gate cut A flat surface portion communicating with the hollow portion and a tapered suction concave portion in which the peripheral wall surface of the flat portion gradually expands toward the tip, and a passage connecting the suction holding member and the negative pressure generator A detection member for detecting the displacement inside is provided, and when the product part after the gate cutting is sucked into the suction recess of the suction holding member, the quality of the gate cutting can be determined based on the displacement detected by the detection member. Form product gate cutting processing apparatus. A product holding member having a holding recess having a shape substantially corresponding to a product portion of a resin molded product, a cutter mounting base supported so as to be movable in a direction approaching and moving away from the holding recess, and a cutter for moving the cutter mounting base When the gate cutting blade is moved to the gate member, the gate cutting blade attached to the working member, the blade mounting base so that the cutting edge coincides with the gate portion of the product portion held in the holding recess, and A positioning member that restricts the movement of the gate cutting blade, a separation holding member that moves the product holding member in a direction in which the product portion held in the holding recess moves away from the sprue portion, and a product portion that grips the resin molded product In a molded product gate cutting apparatus having a gripping member for holding the inside of the holding recess, the base end is supported with respect to the product holding member and rotates in a direction to open and close the holding recess. Both the blade receiving member provided with the blade receiving part located at the gate part of the resin molded product and the positioning part for restricting the movement of the gate cutting blade at the tip part, and the blade receiving member are always opened with respect to the product holding member. When the product part is held in the holding recess, the elastic member urging to the side is rotated so that the blade receiving part is positioned at the gate part against the elastic force of the elastic member by contacting the blade receiving member. There is a pressing member that moves, and on the suction side of the suction holding member, a flat portion with a size that matches the gate-cut product portion, the hollow portion communicating with the center portion, and the peripheral wall surface of the flat portion face the tip. In addition, a tapered suction recess that gradually expands is provided, and a detection member that detects displacement in the passage is provided in the passage that connects the suction holding member and the negative pressure generating device. Detection member when adsorbing the product part of Moldings gate cutting processing apparatus capable determine the acceptability of the gate cut based on the displacement detected more. A product holding member having a holding recess having a shape substantially corresponding to a product portion of a resin molded product, a cutter mounting base supported so as to be movable in a direction approaching and moving away from the holding recess, and a cutter for moving the cutter mounting base An operation member, a gate cutting blade that is attached to the blade mounting base so that the cutting edge coincides with the gate portion of the product portion held in the holding recess, and the product holding the product holding member in the holding recess In a molded product gate cutting device in which a plurality of molded product holding and cutting units, which are integrally provided with separation actuating members that move in a direction away from the sprue portion, are arranged at equiangular positions at concentric positions, products of each molded product holding and cutting unit A blade receiving portion and a gate that are supported by the holding member and pivoted in a direction to open and close the holding recess and to be positioned at the gate portion of the resin molded product at the tip portion The blade receiving member provided with a positioning portion for restricting the movement of the cutting blade, the elastic member that constantly biases the blade receiving member to the product holding member, and the product portion is held in the holding recess. A pressing member that contacts the blade receiving member and rotates so that the blade receiving portion is positioned at the gate portion against the elastic force of the elastic member. A flat surface portion that communicates with the product portion and that communicates with the hollow portion at the center, and a tapered suction concave portion in which the peripheral wall surface of the flat portion gradually expands toward the tip, and the suction holding member. The passage connecting the negative pressure generator is provided with a detection member for detecting the displacement in the passage, and based on the displacement detected by the detection member when the product portion after the gate is cut is sucked into the suction recess of the suction holding member. To determine whether the gate is cut or not Form product gate cutting processing apparatus. The detection member of Claims 1 thru | or 4 is a molded article gate cutting processing apparatus which detects the pressure displacement in a channel | path. 5. The molded product gate cutting apparatus according to claim 1, wherein the detection member detects a pressure displacement of the air amount in the passage. In the molded product gate cutting processing method in which the product part that has been gate-cut from the resin molded product is sucked and held by the suction holding member connected to the negative pressure generator, the product part is sucked to the suction holding member. A gate cutting quality determination method for determining whether the gate cutting is good or not based on the suction displacement. After holding the product part of the resin molded product held by the holding member in the holding recess of the product holding member, the gate cutting blade is moved toward the gate part of the product part to perform gate cutting, and then the product holding member is When the product part is gate-cut in the molded part gate cutting processing method in which the product part in the holding recess is held and taken out by the product take-out member after moving away from the sprue part and separating the product part from the sprue part. The blade receiving member that is rotatably supported by the product holding member is pressed against the elastic force of the elastic member by the pressing member that moves together with the gripping member to close the holding concave portion and the blade receiving portion in the holding concave portion. After the gate is cut and the product holding member is moved, the pressing member is released from contact with the blade receiving member and the holding recess is held by the elastic force of the elastic member. A step of rotating the direction of opening, upon adsorbing the product portion into the suction holding member, the gate cut quality decision method comprising the step of determining the quality of the gate cut based on the displacement of the suction. The suction holding member according to claim 7 or 8 has a size that coincides with the product part on the suction side, a flat part that communicates with a hollow part connected to the negative pressure generator at the center part, and a peripheral wall surface of the flat part at the tip The gate cutting quality is determined by providing a suction recess formed in a tapered shape that gradually expands toward the surface, and determining whether the gate cutting is good or not based on a change in suction that is displaced based on the degree of contact of the product part with the flat part in the suction western part How to determine. The gate cutting quality determination method according to claim 7 or 8, wherein the gate cutting quality is determined based on the displacement of the suction pressure by the detection member. The gate cutting quality determination method according to claim 7 or 8, wherein the gate cutting quality is determined based on the displacement of the suction amount by the detection member.

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