JP2011156768A - Gate cutting device for injection object including lens formed thereon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gate cutting device for an injection object including lenses formed thereon to separate the lenses from the injection object by automatically cutting a gate of the injection object on which the plurality of lenses are formed in four directions. <P>SOLUTION: The gate cutting device for the injection object including the lenses formed thereon comprises: a lower cutting device having a lower cutter cutting the gate of the injection object on which the plurality of lenses are formed in four directions to separate the lenses from the injection object; a sliding device sliding the lower cutting device; an upper cutting device having an upper cutter fixedly installed to oppose to the lower cutter and cutting the gate together with the lower cutter; a lifting device lifting/lowering the upper cutting device; and a controller installed in a frame and controlling the lower cutting device, the upper cutting device, the sliding device and the lifting device. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a gate cutting apparatus for an injection product in which a lens is molded. More specifically, the present invention relates to a device for automatically cutting a gate of an injection product in which a plurality of lenses are molded in four directions of the injection product. The present invention relates to a gate cutting device for an injection product in which a lens for separation from the injection product is molded.

  For example, an optical pickup lens manufacturing method used in an apparatus for reading data recorded on a CD (Compact Disk) or DVD (Digital Video Disc) is an injection molding of an injection product in which a plurality of lenses are integrated. Then, while cutting the lens from the ejected lens, the both sides of the lens received in the lens receiving jig are loaded onto the coating lens receiving jig. Is coated.

  In this way, it is configured to include a process of inspecting the lens on which the coating has been completed and shipping, for example, loading only non-defective lenses on a shipping tray.

  As described above, the projectile in which a plurality of lenses are integrated is a product in which several lenses 5 connected by a runner 3 are integrally formed as shown in FIG.

  In such a lens cutting device (not shown) that can automatically cut the lens 5 from the projectile 1, the projectile 1 is a lower cutter so that the gate 2 of the projectile 1 is cut. When fixed to the upper part, the upper cutter is lowered so that the gate 2 of the injection 1 is cut.

  As described above, the upper and lower cutters of such a conventional lens cutting device are difficult to set for accurate mounting. If the mounting positions of the upper and lower cutters are not set accurately, the gate 2 is not accurately set. The position cannot be cut and may not be cut.

  As a result, many product defects occurred, and the cause of failure of the upper and lower cutters was provided.

  The conventional upper and lower cutters having a general cutter structure are difficult to maintain the function as a cutter because the mounting position is removed after a certain period of use. In addition, a cutting device using a cylinder was devised, but there was a problem that the cut surface of the product cut by this device was not uniform.

  In order to solve such problems, Korean Patent Publication No. 10-0625876 (2006.09.12) has been devised by the present applicant.

  However, as shown in FIG. 2, in the case of an injection 10 in which a plurality of lenses 14 are formed on four sides of a runner 12 for mass production as shown in FIG. Cannot be applied because it cannot be cut, and the structure of the apparatus is complicated, the manufacture is difficult, and the manufacturing and maintenance costs are high.

  The conventional apparatus can be applied only to the projectile 1 having a small number of lenses 5 as shown in FIG.

  On the other hand, a reference numeral 11 in FIG. 2 indicates a sprue.

  The present invention has been devised to solve such problems, and the structure of the apparatus is simple, the manufacturing and maintenance costs are low, and it can be applied to all types of projectiles. It is an object of the present invention to provide a gate cutting device for an injection product in which a lens for improving productivity is molded.

  The problem to be solved by the present invention is the same as described above. Next, means for solving this problem will be described.

  In claim 1, the base provided flat, the supporter provided on the base, the lower block installed so as to be able to slide on the base, and installed on the lower block The work block in which a plurality of lenses are integrally molded on four sides are placed on the upper part, and the work block is fixedly installed on the four peripheral edges of the work block, and the gate of the projectile is cut. A lower cutting device having a lower cutter that allows the lens to be separated from the projectile, a sliding device provided on the base so that the lower cutting device is slid, and supported by the supporter. The upper block installed so that it can be moved up and down, and the upper block so as to face the lower cutter An upper cutting device that is fixedly installed on each of the four peripheral edges of the rack and includes an upper cutter that cuts the gate together with the lower cutter, an elevating device that is installed on the supporter and moves the upper cutting device up and down, and It is comprised from the controller which is installed in a flame | frame and controls the said lower cutting apparatus, the said upper cutting apparatus, the said sliding apparatus, and the said raising / lowering apparatus.

  According to a second aspect of the present invention, the elevating device is installed to be connected to the elevating block by being driven to rotate by the first stepping motor provided in the upper stage portion of the supporter and the first stepping motor, A first ball screw for raising and lowering the upper cutting device, and a first LM guide installed on the supporter and the upper cutting device on the left and right sides of the first ball screw to guide the raising and lowering of the upper cutting device, The elevating device is interlocked with an elevating block installed so as to be able to elevate and lower on the supporter.

  In claim 3, the sliding device is installed between the base and the lower block so that the lower cutting device can be slid, and is installed on one side of the base. A second ball screw that slides the lower cutting device together with the second LM guide and a second stepping motor provided on the base for rotating the second ball screw are configured.

  In Claim 4, four said lower cutters are installed at the four peripheral edges of said work block so that all the gates formed on the four sides of said projectile can be cut at once, and said upper cutter is said upper cutter Four blocks are provided on four sides.

  In claim 5, a blade portion corresponding to the upper cutter is formed on one side of the lower cutter, and the other side of the lower cutter is configured with a mounting portion that is mounted on the work block. At this time, the blade part is formed so as to be pulled in at a certain depth, and the cutting part for cutting the gate together with the upper cutter, and protrudes higher than the cutting part at the center and the periphery of the cutting part. The round edge is formed in a round shape, and the upper cutter is configured to be lowered while sliding while being in contact with the lower cutter.

  In claim 6, when the upper cutter descends and comes into contact with the lower cutter, a shock absorber is installed so as to be buffered when the upper cutter receives a load. A stopping bolt that pressurizes an inner block of the upper fixing device to be fixedly installed, a spring that is fitted to the stopping bolt, and the spring are installed in a certain space. And a spring block provided while supporting the front end of the stopping bolt.

  In Claim 7, Although the cutter adjustment apparatus for adjusting the position of the said upper cutter is installed in the said upper block at the upper part of the said upper cutter, the said cutter adjustment apparatus was provided in the said upper block A guide block; adjustment bolts provided at both ends of the guide block; a fixing block fixed to the adjustment bolt; and a position between the fixing block and the guide block by pressing the adjustment bolt. The cutter setting hinge member is adjusted.

  In Claim 8, The height adjustment apparatus for adjusting the vertical height of the said lower cutter is installed in the lower part of the said lower block, The said height adjustment apparatus is the said lower block and the said lower cutter. Are constituted by bolts and nuts respectively provided between lower fixing devices that are fixedly installed.

  The present invention exhibits the effects described below.

  According to the first aspect of the present invention, the gate cutting work of the injection can be automated, and the mounting and setting of the cutter is easy and convenient, so that the working time according to the mounting and setting of the cutter can be reduced. .

  According to the second aspect of the present invention, the upper cutting device can be automatically raised and lowered, and the upper cutting device can be set at an accurate working position.

  According to the third aspect of the present invention, the lower cutting device can be moved to an accurate working position.

  Since the invention described in claim 4 can be applied to all the injection products in which the lens is molded in various forms, work compatibility can be improved.

  In the invention according to claim 5, since the lower cutter is formed in such a manner that a round portion having a round corner and a cutting portion for cutting the gate are sequentially formed at regular intervals, Cutting the gate while the cutter slides may cause the upper and lower cutters not to be positioned correctly, the gate will not be cut due to a load during cutting, or the gate cutting position may change The problem such as does not occur.

  According to the sixth aspect of the present invention, the setting failure of the cutter does not occur during operation by the shock absorber. Further, since the breakage of the cutter can be prevented, damage generated in the lens, for example, scratch can be prevented, and at the same time, a good cut surface can be obtained.

  In the invention according to claim 7, the position of the upper cutter can be easily adjusted by the cutter adjusting device.

  According to the eighth aspect of the present invention, the lower fixing device for fixing the lower cutter is lifted up and down by adjusting the bolt of the height adjusting device up and down, and the height of the lower cutter is adjusted. Easy cutter setting.

It is a schematic perspective view of the injection object in which the some lens was integrally formed. It is a schematic perspective view of the injection object in which the some lens was integrally formed. 1 is a configuration diagram schematically showing a gate cutting device for an injection product in which a lens according to the present invention is molded. FIG. FIG. 4 is a side view of FIG. 3. FIG. 4 is a detailed view of a main part of FIG. 3. It is detail drawing of the principal part of FIG. It is a top view of the lower cutting apparatus of FIG. It is detail drawing of a lower cutter. FIG. 9 is a side cross-sectional view taken along line IV-IV in FIG. 8.

  Next, preferred embodiments of the present invention will be described in detail.

  FIG. 3 is a block diagram schematically showing a gate cutting device for an injection product molded with a lens according to the present invention, and FIG. 4 shows a side view of FIG.

  5 and FIG. 6 show detailed views of main parts of FIG. 3 and FIG. 4, respectively.

  FIG. 7 shows a plan view of the lower cutting device of FIG.

  Referring to each of these drawings, a gate cutting device for an injection product molded with a lens according to the present invention includes a frame 101, a base 102 provided flat on a certain height of the frame 101, and A supporter 103 provided on the base 102, a lower cutting device 20 installed so as to be able to slide forward and backward on the base 102, and the lower cutting device 20 are vertically opposed to the supporter 103 and can be moved up and down. The upper cutting device 40 installed as described above and the controller 104 that is installed on the frame 101 and controls the lower cutting device 20 and the upper cutting device 40 are configured.

  The controller 104 can be installed in the frame 10 as shown in FIG.

  The upper cutting device 40 is supported by the supporter 103 and fixedly installed on the four sides of the periphery of the upper block 106 so as to face the upper block 106 and the lower cutter 25, respectively. 13 includes an upper cutter 26 for cutting 13 together with a lower cutter 25.

  In addition, the gate cutting device for an injection molded product according to the present invention includes an elevating device provided on the supporter 103 so that the upper cutting device 40 configured as described above is moved up and down.

  Specifically, the elevating device is installed to be connected to the elevating block 42 in a direction along with the first stepping motor 114 provided on the upper stage of the supporter 103 and the supporter 103, so that the first stepping motor is provided. A first ball screw 115 that is rotationally driven by a motor 114 to move the upper cutting device 40 up and down, and a first LM guide that is installed on the supporter 103 on the left and right sides of the first ball screw 115 to guide the upper cutting device 40 to move up and down. 117.

  The lifting device configured as described above is interlocked with the lifting block 42 installed so as to be lifted and lowered by the supporter 103.

  The first stepping motor 114 and the first ball screw 115 are connected by a coupling 116 as shown in FIGS.

  The lower cutting device 20 is installed on the lower block 21 so as to be slidable on the base 102 as shown in FIGS. As shown in FIG. 4, a work block 105 in which an injection product 10 in which a plurality of lenses 14 are integrally formed in four directions is located, and a gate of the injection product 10 are fixedly installed on the four sides of the periphery of the work block 105. And a lower cutter 25 for cutting 13.

  In addition, the gate cutting device for an injection molded product according to the present invention includes a sliding device provided on the base 102 so that the lower cutting device 20 configured as described above is slid on the base 102. Configured.

  Specifically, the sliding device includes a second LM guide 112 that is installed between the base 102 and the lower block 21 and guides the lower cutting device 20 to slide when the lower cutting device 20 is slid. A second ball screw 113a installed on one side of 102 to slide the lower cutting device 20 together with the second LM guide 112; and a second ball screw 113a provided on the base for rotationally driving the second ball screw 113a. And a two-stepping motor 113.

  The first and second LM guides 117 and 112 are moved along a single linear motion guide member 117a and 112a provided along the length direction, and the linear motion guide members 117a and 112a. It comprises guide blocks 117b and 112b.

  As shown in FIGS. 3 to 6, a connecting member 41 is provided for connecting the elevating device and the upper cutting device 40 so that the upper cutting device 40 is moved up and down by the elevating device. .

  The connecting member 41 connects the lifting block 42 of the upper cutting device 40 to the first ball screw 115 and the first LM guide 117.

  The lower cutter 25 is fixedly installed by a lower fixing device, and the upper cutter 26 is fixed by an upper fixing device.

  More specifically, the lower fixing device includes a support block 24a that pressurizes and supports the outer surface of the lower cutter 25, a fixing block 24b that supports and fixes the upper stage portion of the support block 24a and the lower cutter 25, and the support. A first fastening member 24c that fastens the block 24a and the fixed block 24b is configured.

  Similarly, the upper fixing device includes an inner block 27 that is received and fixed on the inner surface of the upper cutter 26, an outer block 28 that supports and fixes the outer surface of the upper cutter 26 together with the inner block 27, and the inner block. 27 and a second fastening member 28a for fastening the outer block 28.

  The upper fixing device configured as described above is provided with a shock absorber so that when the upper cutter 26 descends and comes into contact with the lower cutter 25, it is buffered when subjected to a load.

  Specifically, the shock absorber is installed on one side of the upper fixing device on which the upper cutter 26 is fixed and installed so as to be orthogonal to the upper fixing device, and presses the inner block 27 of the upper fixing device. A bolt 38, a spring 31 fitted to the stopping bolt 38, and a pressure applied to the spring 31 so as to be installed in a fixed space, and at the same time, the front end of the stopping bolt 38 is supported. And a spring block 32 provided.

  Reference numeral 33 in FIGS. 5 and 6 indicates a tension center point of the shock absorber as described above.

  Further, the upper block 106 is provided with a cutter adjusting device for adjusting the position of the upper cutter 26.

  The cutter adjusting device includes a guide block 121 provided on the upper block 106, adjustment bolts 122 provided on both ends of the guide block 121, a fixing block 123 fixed to the adjustment bolt 122, and the fixing block 123. And a cutter setting hinge member 124 that is installed between the guide block 121 and whose position is adjusted by pressing the adjusting bolt 122.

  A height adjusting device for adjusting the vertical height of the lower cutter 25 is provided at the lower portion of the lower block 21. This height adjusting device includes a bolt 22a and a nut 22b provided between the lower block 21 and the lower fixing device, respectively.

  The upper cutter 26 and the lower cutter 25 are preferably made of a cemented carbide having excellent strength and hardness.

  Four lower cutters 25 are installed in four directions of the work block 105, and four upper cutters 26 are installed in the four directions of the upper block 106 and the lens 14 of the projectile 10 is molded in four directions once. The lower cutter 25 and the upper cutter 26 are provided so that they can be cut completely.

  As shown in FIGS. 8 and 9, a blade portion corresponding to the upper cutter 26 is formed on one side of the lower cutter 25, and the other side of the lower cutter 25 is attached to the work block 105. It is comprised from the mounting | wearing part 25c made to do.

  At this time, the blade portion is formed so as to be pulled in at a certain depth, and the cutting portion 25a for cutting the gate 13 of the injection 10 together with the upper cutter 26, and the cutting portion at the center and the periphery of the cutting portion 25a. It protrudes higher than 25a, and the outer periphery is formed by a round (R), and when the upper cutter 26 comes into contact with the lower cutter 25, it is composed of a round portion 25b that is lowered while sliding.

  The operation of the gate cutting device for an ejected product molded with the lens according to the present invention having the above-described configuration will be described.

  Referring back to the drawing, the gate cutting device for an injection product molded with a lens according to the present invention is shown in FIG. 7 so that a gate cutting operation for separating the lens 14 from the injection product 10 is performed first. As shown, the projectile 10 is placed on the work block 105 of the lower cutting device 20.

  The process of placing the projectile 10 is not shown in the drawing, but after the ejector 10 (not shown) that takes out the ejector 10 from the injector, the ejector 10 is removed from the injector. The take-out machine places it on the work block 105.

  In order to place the projectile 10 on the work block 105 in this way, the lower cutting device 20 is transferred by the sliding device, and is transferred from the lower position of the upper cutting device 40 to the front of the unloader. .

  When the ejected material 10 is placed on the work block 105 by the take-out machine, the lower cutting device 20 transfers the upper cutter 26 and the lower cutter 25 to the lower portion of the upper cutting device 40 again as much as possible.

  When the upper cutter 26 and the lower cutter 25 are positioned side by side, the upper cutting device 40 is lowered toward the lower cutting device 20.

  The continuous operation of the lower cutting device 20 and the upper cutting device 40 is performed under the control of the controller 104.

  The lower cutting device 40 is lowered along the first LM guide 117 when the first ball screw 115 formed with a screw is rotated by driving the first stepping motor 114 of the lifting device. To do. Such an operation is the same as the operating principle of the sliding device that allows the lower cutting device 20 to be transferred.

  Next, when the upper cutting device 40 is lowered, the gate 13 of the projectile 10 is cut by the upper cutter 26 and the lower cutter 25.

  At this time, even if the upper cutter 26 and the lower cutter 25 are not accurately set or subjected to a load caused by this, the lower cutter 25 has a corner portion as shown in FIGS. Since the round part 25b in which the round (R) is formed and the cutting part 25a for cutting the gate 13 are sequentially formed at regular intervals, the position settings of the upper cutter 26 and the lower cutter 25 are accurately set. Even when not performed, the gate 13 is cut while the upper cutter 26 slides on the round portion 25b.

  For this reason, the setting of the cutter for cutting the gate 2 in FIG. 1 is not accurate as before, the gate 2 is not cut due to a load during cutting, or the cutting position of the gate 2 is changed. There is no problem.

  In addition, the gate cutting device for the injection molded product according to the present invention is equipped with the shock absorber as described above, and even when the upper cutter 26 receives a large load when the gate 13 is cut, A sliding action is possible.

  In addition, even when the upper cutter 26 is repeatedly loaded by the repetitive cutting operation of the upper cutter 26, the upper cutter 26 is restored to the original setting position by the shock absorber.

  Even if the setting position of the upper cutter 26 deviates during the operation, the cutter adjusting device for adjusting the position of the upper cutter 26 is installed in the gate cutting device for the injection molded product according to the present invention. Therefore, the position of the upper cutter 26 can be easily adjusted. That is, if the adjustment bolts 122 at both ends of the guide block 121 provided on the upper block 106 are adjusted, the cutter setting hinge member 124 is adjusted, and eventually the position of the lower cutter 25 is adjusted.

  In addition, the conventional gate cutting device for an injection molded product in which a lens is molded cannot adjust the working speed, but the present invention includes a first stepping motor 114, a first ball screw 115, Since the controller 104 for controlling the apparatus is provided, high-speed transfer is possible when transferring the apparatus for work, and the work speed can also be controlled by the material of the injection 10.

  Since the lower cutting device 20 is provided with a bolt 22a and a nut 22b as height adjusting devices for adjusting the vertical height of the lower cutter 25, the bolt 22a is adjusted up and down. Thus, the lower fixing device for fixing the lower cutter 25 moves up and down, and the height of the lower cutter 25 is adjusted after all. Accordingly, the setting of the lower cutter 25 can be easily performed.

  In addition, since the upper cutter 26 and the lower cutter 25 of the gate cutting device of the injection product molded with the lens according to the present invention are provided with four cutters 25 and 26 in four directions, regardless of the form of the injection product 10. All are applicable. That is, all of the projectiles 1 and 10 in FIGS. 1 and 2 can be applied.

  When the cutting of the gate 13 is completed by the upper cutter 26 and the lower cutter 25, the lower cutting device 20 slides forward of the base 102 by the sliding device and moves forward. Thus, when the advance of the lower cutting device 20 is completed, the lens 14 separated from the projectile 10 is attracted to the lens 14 by a lens transfer device provided on one side of the base 102 (not shown). To be adsorbed. The thus adsorbed lens is transferred by a transfer device (not shown) and received in a lens tray (not shown). The suction device, the transfer device, and the tray are provided at the periphery of the gate cutting device for the injection product on which the lens according to the present invention is molded.

10 projectile 13 gate 14 lens 20 lower cutting device 21 lower block 22a bolt 22b nut 24a support block 24b fixed block 25 lower cutter 25a cutting portion 25b round portion 25c mounting portion 26 upper cutter 27 inner block 28 outer block 28a second fastening member 31 Spring 32 Spring block 38 Stopping bolt 40 Upper cutting device 41 Connecting member 42 Elevating block 101 Frame 102 Base 103 Supporter 104 Controller 105 Work block 106 Upper block 112 Second LM guide 112a Linear motion guide member 113 Second stepping motor 113a Second Ball screw 114 First stepping motor 115 First ball screw 116 Coupling 17 The 1LM guide 117a linear movement guide member 121 guide block 122 adjustment bolt 123 fixed block 124 cutter setting hinge member

Claims (8)

A base provided flat, a supporter provided on the base, a lower block installed so as to be slidable on the base, and a plurality of lenses installed on the lower block. A work block in which an integrally formed injection product is placed on the upper part, and fixedly installed on the four peripheral edges of the work block to cut the gate of the injection product, so that the lens is separated from the injection product. A lower cutting device having a lower cutter, a sliding device provided on the base so that the lower cutting device is slid, and an upper block that is supported by the supporter and can be moved up and down And four sides of the periphery of the upper block so as to face the lower cutter. An upper cutting device having an upper cutter that is fixedly installed and cuts the gate together with the lower cutter, an elevating device that is installed on the supporter and raises and lowers the upper cutting device, and the lower cutting device that is installed on the frame A gate cutting device for an injection molded product with a lens, comprising: a controller for controlling the upper cutting device, the sliding device, and the lifting device. The lifting device is
A first stepping motor provided at an upper stage of the supporter; a first ball screw which is rotationally driven by the first stepping motor and is connected to the lifting block; and lifts and lowers the upper cutting device; A first LM guide installed on the supporter and the upper cutting device on the left and right sides of the first ball screw to guide the upper and lower of the upper cutting device;
2. The gate cutting device for an injection molded product according to claim 1, wherein the lifting device is interlocked with a lifting block installed so as to be lifted and lowered by the supporter. The sliding device is
A second LM guide installed between the base and the lower block for guiding the lower cutting device to slide; and installed on one side of the base to slide the lower cutting device together with the second LM guide. The lens according to claim 1, comprising a second ball screw and a second stepping motor provided on the base for rotationally driving the second ball screw. Gate cutting device for ejected materials.   Four lower cutters are installed on the four peripheral edges of the work block so that all the gates formed on the four sides of the projectile can be cut at once, and the upper cutter has four on the four sides of the upper block. 2. The gate cutting device for an injection molded product according to claim 1, wherein the lens is molded. One side of the lower cutter is formed with a blade portion corresponding to the upper cutter, and the other side of the lower cutter is configured with a mounting portion to be mounted on the work block,
At this time, the blade part is formed so as to be pulled in at a certain depth, and the cutting part for cutting the gate together with the upper cutter, and protrudes higher than the cutting part at the center and the periphery of the cutting part. 2. The lens-molded injection according to claim 1, wherein the lens has a round periphery, and is formed of a round portion that is lowered while sliding when the upper cutter contacts the lower cutter. Gate cutting device for things. When the upper cutter descends and contacts the lower cutter, a shock absorber is installed so that the upper cutter is buffered when subjected to a load,
The shock absorber is
A topping bolt that pressurizes an inner block of an upper fixing device that fixes and installs the upper cutter, a spring that is fitted to the stopping bolt, and the spring is installed in a certain space. 2. The gate cutting of the injection molded article according to claim 1, comprising a spring block provided while supporting the front end portion of the stopping bolt at the same time as pressing. apparatus. A cutter adjusting device for adjusting the position of the upper cutter is installed in the upper block on the upper cutter.
The cutter adjusting device is
A guide block provided on the upper block, an adjustment bolt provided on both ends of the guide block, a fixed block fixed to the adjustment bolt, and installed between the fixed block and the guide block. 2. The gate cutting device for an injection molded product according to claim 1, comprising a cutter setting hinge member whose position is adjusted by pressurization. At the lower part of the lower block, a height adjusting device for adjusting the vertical height of the lower cutter is installed,
2. The lens according to claim 1, wherein the height adjusting device includes a bolt and a nut that are respectively provided between a lower fixing device that fixes and installs the lower block and the lower cutter. Is a gate cutting device for injection molded products.

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