JP2014233976A - Undercut take-out device for injection mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize an undercut take-out device for an injection mold, and to reduce costs by simplification of the production process and improvement of productivity.SOLUTION: An undercut take-out device for an injection mold includes lower original plate provided with a sliding part including a molding hole formed between the lower original plate and a fixed plate 120, with one side opened, a storage hole formed so as to communicate with the lower side of the molding hole and a pin guide hole, an ejector plate 220 provided with a fixed eject pin 210 for taking out an injected product through an ascending/descending operation, guide shafts 230 which are formed on both sides of the ejector plate and support the operation of the ejector plate, and a molding core including a drive shaft 310 which is reciprocated through an ascending/descending operation of the ejector plate, a molding unit 320 bonded to the upper side of the drive shaft and power providing means 330 which is bonded to the lower end of the drive shaft and provides an elastic force so as to operate the drive shaft.

Description

  The present invention relates to an undercut removal device for an injection mold. More specifically, it is possible to reduce the size of the take-out device for injection-molding a product with an undercut, which can reduce the manufacturing cost of the undercut take-out device and enables the product to be taken out in one step. The present invention relates to an undercut removal device for an injection mold capable of maximizing the productivity of a product as well as simplifying the production process.

  In general, undercut refers to a small portion where it is difficult to discharge the injection only by closing the mold or moving the mold.

  Although such an undercut can be classified into the case of being outside and inside of a molded product, the undercut not only makes it easy to take out the product but also forms an undercut. When the product was taken out at a part, the product was defective due to contact or collision with the mold.

  FIG. 1 is a view showing an injection mold having an inner undercut structure according to the prior art.

  As shown in the figure, an injection mold according to the prior art is a Korean registered patent (Registration No. 10-0835615), which includes a cavity plate 1 in which a cavity block 11 is formed and a core plate 2 in which a core block 21 is formed. In an injection mold comprising an inclined core 3 including an ejector shaft 31 inserted into a diagonal structure in the center of the inner side of the core plate 2 so as to be operated and guided by an underlay piece 4 and a pair of guide pieces 5 An inclined support member 6 including a support block 61 and a fixing bolt 62 is further provided on one side of the upper surface of the inclined core 3 into which the shaft 31 is inserted into a diagonal structure, and the inclined support member 6 is placed on the right side of the eject shaft 31. The core plate 2 is configured to be attached to the one side of the upper surface of the core plate 2 in a detachable structure.

  However, in the injection mold according to the prior art, as the inclination of the undercut increases, the inclined core 3 for forming the undercut portion is separated from the product when the product is taken out from the injection mold, and the product is safely removed from the mold. There was a difficult problem.

  In addition, the injection mold according to the prior art consumes a lot of cost and time for manufacturing the injection mold apparatus due to the complicated internal structure. There is a problem that a failure occurs, and there is a complicated problem in the production process.

  Korean Registered Patent No. 10-0835615 (2008.05.30)

  In order to solve such problems, the present invention can reduce the size of a take-out device for injection-molding a product having an undercut, thereby reducing the manufacturing cost of the undercut take-out device. Based on the fact that the product can be taken out in one step, it is possible to simplify the production process as well as to provide an undercut removal device for the injection mold that can maximize the product productivity. The purpose is to do.

  The present invention for achieving such a subject is formed in an undercut taking-out device for an injection mold so as to communicate with a molding hole formed so that one side is opened and a lower side of the molding hole. The lower original plate that constitutes the sliding portion in which the accommodation hole and the pin guide hole are formed, the ejection plate on which the eject pin for taking out the ejected material by the lifting operation is fixedly installed, and the both sides of the ejection plate are configured. A guide shaft that supports the operation of the ejector plate, a drive shaft that is reciprocated by the raising and lowering operation of the ejector plate, a molding unit coupled to the upper side of the drive shaft, and a lower end of the drive shaft. An injection mold that is provided with a molding core including a power providing means for providing an elastic force so that the shaft is operated. Providing Dakatto extraction device.

  Further, in the present invention, the eject pin is formed with a fixing portion so that a lower end thereof is fixed to the protruding plate, and sliding operation is performed along an inner periphery of the pin guide hole of the lower original plate by raising and lowering the protruding plate. An undercut removal device for an injection mold is provided that is configured to eject the ejected material.

  In the present invention, the ejecting plate is coupled to a first ejecting plate in which a fixing hole to which the fixing portion of the eject pin is fixed is formed, and a lower side of the first ejecting plate to raise and lower the ejecting pin. An undercut removal device for an injection mold is provided that includes a second ejection plate that supports operation.

  Further, in the present invention, the protruding plate is formed with shaft through holes inserted on both sides so that the guide shaft penetrates, the drive shaft penetrates, and the drive shaft is lifted and lowered in the left or right direction. Provided is an undercut taking-out device for an injection mold characterized in that a movable operation hole is formed.

  Also, in the present invention, the drive shaft is inserted so as to penetrate through the operation hole, is formed in a circular or polygonal shape, and is coupled to the molding unit at the upper end to support the operation of the molding unit. An undercut removal device for an injection mold is provided in which a member is configured, and a coupling portion coupled to a power providing means is configured at a lower end.

  Further, in the present invention, the lower end portion of the protruding plate is supported on the outer periphery of the drive shaft, and the drive shaft is operated through the power supply device by compressing or expanding the power supply means depending on whether the protrusion plate is operated. The present invention provides an undercut removal device for an injection mold, characterized in that a stopper is provided so as to perform the above.

  Further, in the present invention, the molding unit is coupled and fixed to the inside of the molding hole and has one end opened, and a plurality of guide members formed so as to protrude inward. An injection mold undercut removal device comprising a unit main body provided with a unit hole in which a guide hole into which the guide member is inserted and installed is formed, and an adjustment groove to which the angle adjustment member is coupled is formed at a lower end. provide.

  Also, in the present invention, the ejector plate is provided with an eject pin, and the drive shaft is rotatably coupled to the lower ejector plate through which the cylinder of the power supply means passes so that the power supply means can be operated. An undercut removal device for an injection mold is provided, wherein the upper portion of the power supply means is coupled to the upper supply plate that supports the lifting and lowering operation of the drive shaft by the operation of the power supply means.

  According to the present invention as described above, there is an effect that a product in which an undercut portion is formed when a product is taken out from the injection mold can be safely taken out from the mold.

  Further, according to the present invention, it is possible to reduce the size of the structure of an apparatus for injection-molding and taking out products having undercuts, thereby reducing the manufacturing cost, simplifying the production process, and producing the product. This has the effect of improving the performance.

Drawing which shows undercut taking-out device by prior art, The perspective view which shows roughly the undercut extraction apparatus of the injection mold by the preferable 1st Example of this invention, The perspective view which shows roughly the undercut extraction apparatus of the injection mold by the preferable 1st Example of this invention, Sectional drawing which shows the undercut removal apparatus of the injection mold by preferable 1st Example of this invention, The principal part enlarged view which shows a shaping | molding unit in the undercut extraction apparatus of the injection mold by preferable 1st Example of this invention, The principal part enlarged view which shows a shaping | molding unit in the undercut extraction apparatus of the injection mold by preferable 1st Example of this invention, The drawing which shows the stopper of the undercut taking-out device of the injection mold by the 1st preferred example of the present invention, The drawing which shows the stopper of the undercut taking-out device of the injection mold by the 1st preferred example of the present invention, The operation state figure which shows the undercut taking-out device of the injection mold by the 1st example preferred of the present invention, The operation state figure which shows the undercut taking-out device of the injection mold by the 1st example preferred of the present invention, Sectional drawing which shows the undercut extraction apparatus of the injection mold by preferable 2nd Example of this invention, FIG. 6 is an operational state diagram showing an undercut removal device for an injection mold according to a second preferred embodiment of the present invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that the same reference numerals are added to the constituent elements of each drawing so that the same constituent elements have the same reference numerals as much as possible even if they are displayed on other drawings. Further, in the description of the present invention, when it is determined that a specific description of a known configuration or function related to the present invention can obscure the gist of the present invention, a detailed description thereof will be omitted.

  2 and 3 are perspective views schematically showing an injection mold undercut removal device according to a first preferred embodiment of the present invention, and FIG. 4 is an injection mold undercut removal according to a first preferred embodiment of the present invention. FIG. 5a and FIG. 5b are enlarged views showing the main part of the undercut removal device for an injection mold according to the first preferred embodiment of the present invention. FIG. 6a and FIG. FIG. 7 and FIG. 8 are views showing an operation state of an undercut removing device for an injection mold according to a first preferred embodiment of the present invention. .

  As shown in the drawing, the undercut removing device 200 of the present invention is configured between the lower original plate 110 and the fixed plate 120 so as to enable safe and easy removal of the ejected matter having the undercut, thereby moving up and down. By ejecting the ejected pin 210, the ejecting plate 220 on which the ejecting pin 210 is fixedly installed, the guide shaft 230 that is configured on both sides of the ejecting plate 220 and supports the operation of the ejecting plate 220, and the operation of the ejecting pin 210. The molding core 300 is configured to take out an injection product in which an upward sliding operation is performed and an undercut is formed.

  Here, the lower original plate 110 forms an upper part of the movable mold, and serves as a component for molding the inner part of the injection product, and is an upper portion of the undercut extraction device 200 that is operated for taking out the injection product. The sliding unit 130 is configured such that the components are inserted and installed so that the upper and lower sliding operations can be performed.

  The sliding portion 130 is provided with a molding core 300 of the undercut take-out device 200 described later, and is formed so that one side is opened to form an undercut portion of the injection, and this The accommodation hole 134 is formed so as to communicate with the lower side of the molding hole 132 so that the drive shaft 310 of the molding core 300 penetrates and the lifting operation is performed.

  In addition, the sliding portion 130 of the lower original plate 110 is formed with a pin guide hole 136 that is inserted so that the eject pin 210 formed in the undercut take-out device 200 passes therethrough and can be moved up and down.

  On the other hand, a fixing portion 212 is formed so that the lower end of the eject pin 210 of the undercut take-out device 200 is fixed to the protruding plate 220, and the protruding plate 220 moves up and down to the inner periphery of the pin guide hole 136 of the lower original plate 110. A sliding operation is performed along the ejecting object.

  The ejecting plate 220 is configured so that the eject pin 210 is moved up and down, so that it is located on the same center line as the pin guide hole 136 of the lower original plate 110, and a fixing hole to which the fixing portion 212 of the eject pin 210 is fixed. The first protruding plate 222 on which 222a is formed and the second protruding plate 224 that is coupled to the lower side of the first protruding plate 222 and supports the lifting operation of the eject pin 210.

  Such a protruding plate 220 is formed with shaft through holes 228 inserted on both sides so that the guide shaft 230 penetrates, and the drive shaft 310 of the molding core 300 passes therethrough. An operation hole 226 is formed so as to be movable at a predetermined angle in the right direction.

  The guide shaft 230 is a component that is installed in the shaft through hole 228 of the protruding plate 220 and serves to maintain the straightness of the protruding plate 220 by guiding the sliding direction of the protruding plate 220.

  The guide shaft 230 is configured such that the upper end and the lower end thereof are fixedly coupled to the lower original plate 110 and the fixed plate 120, respectively, and support the lifting operation of the protruding plate 220.

  On the other hand, the molding core 300 of the present invention is a component that is moved up and down together with the eject pin 210 so that the undercut portion of the ejected material is taken out when the eject pin 210 is moved up and down.

  Such a molding core 300 penetrates the operation hole 226 of the ejection plate 220, and is coupled to the drive shaft 310 that is reciprocated by the raising and lowering operation of the ejection plate 220, and the upper side of the drive shaft 310 to A predetermined elastic force is provided so that the drive shaft 310 is operated by being connected to the lower end of the drive shaft 310 by being installed on the fixed plate 120 and the molding unit 320 configured to perform undercut molding and removal. It is comprised including the power provision means 330 which provides this.

  The drive shaft 310 is inserted through the operation hole 226 to be formed in a circular or polygonal shape, and an angle adjusting member 312 is configured to support the operation of the molding unit 320 by being coupled to the molding unit 320 at the upper end. In addition, a coupling portion 314 coupled to the power providing unit 330 is configured at the lower end.

  Further, a lower end portion of the protruding plate 220 is supported on the outer periphery of the drive shaft 310, and the driving shaft 310 is operated through the power providing unit 330 by compressing or expanding the power providing unit 330 depending on whether the protruding plate 220 is operated. A stopper 313 is installed.

  That is, the stopper 313 is moved downward by the second protrusion plate 224 when the protrusion plate 220 is lowered, and the drive shaft 310 is also moved downward by the stopper 313 so that power is provided at the lower end of the drive shaft 310. The compression of the means 330 is to be performed.

  In addition, when the raising and lowering operation of the ejection plate 220 is performed, the power providing means 330 in a compressed state is expanded by an elastic restoring force, thereby forming the drive shaft 310 while moving upward. By allowing the unit 320 to operate, the product on which the undercut portion of the injection product is formed can be safely removed from the mold through the eject pin 210 and the molding unit 320.

  The stopper 313 serves to support the drive shaft 310 and at the same time can control the sliding interval of the ejection plate 220.

  That is, as shown in FIG. 6b, a thread is formed along the outer periphery of the drive shaft 310, and the stopper 313 is fastened to the thread, thereby adjusting the position of the stopper 313. By limiting the sliding range of the protruding plate 220 that comes into contact with the stopper 313, the protruding plate 220 can be prevented from colliding with the lower original plate 110 and the fixed plate 120 and being damaged.

  The molding unit 320 is coupled and fixed to the inside of the molding hole 132 and has one end opened, and a unit cover 410 formed with a plurality of guide members 412 projecting inward, and provided inside the unit cover 410. The unit body 420 is formed with a guide hole 422 into which the guide member 412 is inserted and installed on one surface so as to be interlocked with the raising / lowering operation of the drive shaft 310 and an adjustment groove 424 with which the angle adjustment member 312 is coupled at the lower end. It is configured with.

  Here, the unit cover 410 is coupled and fixed to the fastening means 304 that is formed to protrude inside the molding hole 132, so that a firm coupling force is maintained and the unit cover 410 is prevented from flowing due to the lifting operation of the unit body 420. be able to.

  The unit body 420 is slid upward along the inner surface of the guide hole 422 when the drive shaft 310 is moved up and down by inserting the guide member 412 inside the guide hole 422. .

  For example, the guide hole 422 can guide the unit body 420 to slide in the vertical direction or the oblique direction along the inner surface of the guide hole 422 with reference to the guide member 412.

  Further, when the unit body 420 slides along the inner surface of the guide hole 422, the inner surface of the adjustment groove 424 is formed in a hemispherical shape, so that the drive shaft 310 may be eccentric due to the sliding direction of the unit body 420. A firm connection between the drive shaft 310 and the unit main body 420 is maintained, and can flow according to the sliding direction.

  Therefore, the molding unit 320 can be easily taken out by minimizing the defect and the breakage rate of the injection product that is slid by the undercut portion of the injection product to form the undercut.

  Meanwhile, as shown in FIGS. 9 and 10, the injection mold undercut take-out device 200 according to the second embodiment of the present invention has a protruding plate 220 on which an eject pin 210 for taking out an ejected material by a lifting operation is fixedly installed. The drive shaft 310 that is reciprocated by the raising and lowering operation of the ejector plate 220, the molding unit 320 coupled to the upper side of the drive shaft 310, and the lower end of the drive shaft 310 are operated to operate the drive shaft 310. As shown in the figure, the molded core 300 includes power providing means 330 for providing predetermined power.

  Here, the ejection plate 220 is provided with an eject pin 210, and a lower ejection plate 522 through which a cylinder of the power providing means 330 passes and an upper portion of the power providing means 330 are coupled so that the power providing means 330 can operate. A plurality of drive shafts 310 are formed on the upper protruding plate 524 formed with the operation holes 226 so that the drive shaft 310 can be moved up and down by the operation of the power providing means 330.

  That is, the lower ejection plate 522 is supported on the lower side of the cylinder of the power providing means 330 and is configured to support the lifting operation of the eject pin 210 while being lifted and lowered by the operation of the cylinder. The drive shaft 310 is a component that is rotatably coupled to support the raising and lowering operation and rotation of the drive shaft 310 by the operation of the power providing means 330.

  The present invention configured as described above is configured between the lower original plate 110 and the fixed plate 120, so that the lower original plate 110 on which the sliding portion 130 is configured and the ejection plate 220 on which the eject pin 210 is fixedly installed and the protrusion By providing the guide shaft 230 and the molding core 300 that are configured on both sides of the plate 220, the projecting plate 220 and the molding unit 320 are moved down by the mold closing, and an injection product in which an undercut is formed is molded. The projecting plate 220 is moved up and down by the mold opening, and the eject pin 210 pushes and ejects the ejected material. Even if the undercut inclination of the ejected material increases due to the slide operation of the unit body 420, the ejected material Can be safely removed from the mold, and the internal structure of the injection mold is simple, saving money and time Is in a readily miniaturized with a small number of parts, bits and pieces less failures cheaper cost of the manufacturing apparatus, the production process becomes easier an invention which can reduce the cost of the product.

  The above description is merely illustrative of the technical idea of the present invention, and a person who has ordinary knowledge in the technical field to which the present invention belongs does not depart from the essential characteristics of the present invention. Various modifications and variations are possible. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to explain them, and the scope of the technical idea of the present invention is not limited by such examples. Absent. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the right of the present invention.

DESCRIPTION OF SYMBOLS 110 Lower original plate 120 Fixed plate 130 Sliding part 132 Molding hole 134 Accommodating hole 136 Pin guide hole 210 Eject pin 212 Fixed part 220 Ejection plate 222 First ejection plate 222a Fixed hole 224 Second ejection plate 226 Operation hole 228 Shaft penetration hole 230 Guide Shaft 300 Molded core 304 Fastening means 310 Drive shaft 312 Angle adjusting member 313 Stopper 314 Coupling part 320 Molding unit 330 Power providing means 410 Unit cover 412 Guide member 422 Guide hole

Claims (9)

In the undercut removal device for injection molds,
A lower original plate configured with a forming hole formed so that one side is opened, a receiving hole formed so as to communicate with the lower side of the formed hole, and a sliding portion in which a pin guide hole is formed;
An ejector plate on which an eject pin for taking out an ejected product by lifting and lowering is fixed and installed;
A guide shaft configured on both sides of the protruding plate to support the operation of the protruding plate;
A drive shaft that is reciprocated by the raising and lowering operation of the protruding plate, a molding unit that is coupled to the upper side of the drive shaft, and a predetermined power that is coupled to the lower end of the drive shaft to operate the drive shaft. An undercut removal device for an injection mold, which is provided with a molding core including power providing means for providing the power.   The eject pin is formed with a fixing portion so that a lower end thereof is fixed to the protruding plate, and a sliding operation is performed along an inner periphery of the pin guide hole of the lower original plate by an elevating operation of the protruding plate. The undercut removing device for an injection mold according to claim 1, wherein the ejecting die is configured to be ejected.   The ejecting plate is coupled to a first ejecting plate in which a fixing hole to which the fixing portion of the eject pin is fixed is formed, and a second that is coupled to the lower side of the first ejecting plate to support the lifting operation of the ejecting pin. The undercut removal device for an injection mold according to claim 1, further comprising an ejection plate.   The projecting plate is formed with shaft through holes inserted on both sides so that the guide shaft penetrates, the drive shaft penetrates, and there is an operation hole that can be moved up and down and left or right. The undercut removal device for an injection mold according to claim 1, wherein the undercut removal device is formed.   The drive shaft is inserted so as to penetrate through the operation hole, is formed in a circular or polygonal shape, and an angle adjusting member configured to support the operation of the molding unit by being coupled to the molding unit at the upper end is configured. The undercut removal device for an injection mold according to claim 4, wherein a coupling portion coupled to the power providing means is formed at the lower end.   2. The injection according to claim 1, wherein a stopper is installed on an outer periphery of the drive shaft to support a lower end portion of the protruding plate and to operate the drive shaft through the power providing means. Mold undercut removal device.   The undercut removal device for an injection mold according to claim 6, wherein the stopper is formed with a screw thread on an outer peripheral surface of the drive shaft so that the position of the stopper can be adjusted, and fastened to the screw thread.   The molding unit is coupled and fixed to the inside of the molding hole and has one end opened, and a unit cover having a plurality of guide members formed to project inward, and the unit cover is provided on one side of the unit cover. 6. The injection mold according to claim 5, further comprising a unit main body formed with a guide hole into which the guide member is inserted and having an adjustment groove to which the angle adjustment member is coupled at the lower end. Undercut removal device. The ejector plate is provided with an eject pin and a lower ejector plate through which a cylinder of the power providing means passes so that the power providing means can be operated,
2. The drive shaft according to claim 1, wherein the drive shaft is rotatably connected, and an upper portion of the power supply means is connected to the drive shaft so as to support the raising / lowering operation of the drive shaft by the operation of the power supply means. The undercut removal device for the injection mold as described.

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