TWI449618B - Release assisting apparatus - Google Patents

Description

Release auxiliary mechanism

The present invention relates to a release assist mechanism, and more particularly to a release assist mechanism for holding a product on a side of a male mold when the male mold is separated from the master mold.

In the process of producing a product by injection molding using a mold including a male mold and a female mold, it is usually required to keep the product on the male mold side when the male mold is separated from the female mold, and then the product is removed from the male mold by the ejection mechanism. The side is ejected to prevent the product from sticking to the side of the master mold, and then when the product is released from the side of the master mold by an external force, the product and the master mold are rubbed against the outer surface of the product to cause a flaw. However, in the injection molding process, a vertical gate is usually provided in the master mold, and the molten molding material is injected from the vertical runner. Therefore, after the molten molding material is injected from the vertical gate of the master mold, the male mold is separated from the master mold. It is often the case that the product sticks to the master mold at the down sprue.

On the other hand, as shown in Fig. 10, in order to facilitate the separation of the product from the master mold, a conventional technique of providing a pick-up pin mechanism at a position of a gate on a male mold opposed to the down sprue is known. Such a grasping pin 707 is provided with a barb. When the male mold is separated from the female mold, the product 900 is held on the side of the male mold 700 by the barb on the grasping pin 707. However, the product 900 is separated from the grasping pin 707. At this time, the barb on the catch pin 707 will scrape the dust from the head 910 of the article 900. If the product is a transparent product for optics, the dust on the product may cause a step of cleaning in the post-process, which leads to waste of working time, and thus a grab pin without a barb is used. However, if the catching pin is not provided with a barb and only the adhesion between the molding material and the pin is used, the product is kept at the time when the male die and the master are separated. On the side of the male mold, there will still be cases where the above products are stuck to the master mold, which affects the yield of the product.

In order to solve the above problems, the present invention provides a release assisting mechanism which is provided in cooperation with a mold having a male mold and a female mold. The male mold includes a first mold block and at least one second mold block disposed around the first mold block. The release assist mechanism of the present invention includes a fixed seat, a flipper plate, and a movable lever. The fixed seat is fixed on the second mold block. The flipper has a fixed end rotatably coupled to the mount and an abutment end relative to the fixed end. The movable rod moves up and down in the axial direction of the second mold block and is coupled to the flipper. The movable rod interlocks the flipper to flip such that the abutting end of the flipping plate is movable between a position of the abutment of the second die block and a release position away from the second die block.

Wherein, the abutting end may have a barb facing the second mold block. The side surface of the flipping plate can form a long groove extending along the side surface, and the upper end surface of the movable rod can form a groove for accommodating the flipping plate, and a pin extends into the long groove to connect the flipping plate into the groove. When the flipper is in the abutment position, it is preferable that the fixing seat, the flipping plate, and the movable lever do not extend beyond the second die block.

Preferably, the second mold block is a gate block having a material flow path, the fixed seat is fixed to the side of the flow path of the material head, and when the flipping plate is in the abutting position, the abutting portion is extended. Feed the head flow path. At this time, the gate of the gate block may further include a grab pin that moves up and down in the axial direction, and the grab pin and the movable bar are preferably fixed to the same ejector plate.

In addition, the fixing seat and the flipping plate can be integrally formed. At this time, the fixing seat forms a spherical groove, and is disposed on the second die block in cooperation with a spherical fixing member.

Furthermore, the present invention provides a mold having a male mold, a female mold, and the above-described release assisting mechanism.

According to the release assisting mechanism of the present invention, when the male mold is separated from the master mold, the product can be surely held in the male mold, and dust pollution is not caused, and the product yield can be improved.

Hereinafter, the release assisting mechanism of the present invention will be described in detail based on the drawings.

As shown in the embodiment of Figures 1 and 2, the release assist mechanism of the present invention is provided in cooperation with a mold having a male mold 700 and a female mold 800 located above the male mold 700 corresponding to the male mold 700. A sprue 801 is formed on the master 800 toward the male mold 700. The male mold 700 includes a first mold block 701 and at least one second mold block 702 disposed on a side of the first mold block 701. The second mold block 702 is preferably a gate block. On the second mold block 702 as a gate block, a gate 708 is formed at a position opposite to the down sprue 801 of the master mold 800, and a material flow path 706 extending from the gate 708 is directed to the first mold block 701. The material exiting from the down sprue 801 into the mold is guided between the male mold 700 and the female mold 800. A grab pin guide hole 705 is formed in the gate 708, and the second die block 702 is penetrated from the gate 708. The catch pin 707 is moved up and down along the grab pin 707 in the grip pin guide hole 705. A movable rod guiding hole 704 is formed on each side of the material flow path 706, and the second mold core 702 is penetrated from the second mold core 702. The movable rod guiding hole 704 is preferably in the same direction as the receiving pin guiding hole 705. extend. Side of each movable rod guide hole 704, in the second mold block A recess 703 is further formed on the 702.

The release assist mechanism of the present invention includes a mount 100, a flipper 200, and a movable lever 300. The fixing base 100 is provided with a counterbore 110, and the fixing hole 100 is fixed to the recess 703 provided on the second die block 702 by the fixing hole of a screw, a rivet, a solder joint or the like (not shown). . In order not to interfere with the closing of the male mold 700 and the female mold 800, when the fixing base 100 is fixed in the recess 703, it is preferable not to protrude from the upper surface of the second mold core block 702. A side of the fixing base 100 adjacent to the movable rod guiding hole 704 is provided with a flipping plate connecting portion 120 for connecting with the flipping plate 200.

The flipping plate 200 is formed in a rectangular flat shape and is located above the movable rod guiding hole 704. One end thereof is used as the fixed end 210, and the fixed end 210 is rotatably connected to the flipping plate connecting portion 120 of the fixing base 100 by the turning pin 240. On the flipper board 200, the opposite end of the fixed end 210 becomes the abutment end 220. In this embodiment, the abutting end 220 has a barb 221 with respect to the releasing direction R, and an angle formed by one surface of the barb 221 and the upper surface of the flipping plate 200 is less than 90 degrees and faces the second die block 702. Preferably.

The movable rod 300 is connected to the movable rod guiding hole 704 of the second mold block 702, moves up and down along the movable rod 300, and is coupled to the flipping plate 200. In this embodiment, the side of the flipping plate 200 is formed along the side. The side extending long slot 230, the upper end of the movable rod 300 forms a flipping plate actuating portion 310, the flipping plate actuating portion 310 forms a groove for accommodating the flipping plate 200, and a pin hole 311 is formed on the groove wall of the groove, The elevating pin 250 of the insertion pin hole 311 extends into the long groove 230, and the flip plate 200 is coupled into the groove as the flipping plate actuating portion 310.

When the movable rod 300 moves upward along the movable rod guiding hole 704, the movable rod 300 pushes up the flipping plate 200, so that the flipping plate 200 is turned by the turning pin 240 The abutting end 220 is away from the second mold block 702; when the movable rod 300 moves downward along the movable rod guide hole 704, the movable rod 300 is rotated by the flipping plate actuating portion 310 to rotate the flipping plate 200 Closing causes the abutment end 220 to approach the second mold block 702. That is, with such a release assisting mechanism, the movable lever 300 interlocks the flipping plate 200 to be turned over so that the abutting end 220 of the flipping plate 200 can be in a position close to the second die block 702 and away from the second die block. Move between the release positions of 702.

In order not to interfere with the closing of the male mold 700 and the female mold 800, in addition to the above-mentioned fixing base 100, when the flipping plate 200 is in the abutting position, the flipping plate 200 and the movable rod 300 are not beyond the second mold core block 702. good.

3 to 5, the perspective view shown in (a) and the corresponding cross-sectional view shown in (b), the embodiment in which the product is held in the male mold 700 by the release assist mechanism of the present invention will be described. For convenience of explanation, the representation of the master 800 is omitted in FIGS. 3 to 5.

As shown in FIG. 3, the release assisting mechanism of the present invention moves downwardly with the movable lever 300, and the flipping plate actuating portion 310 interlocks the flipping plate 200 to close, so that the abutting end 220 is close to the second die block 702. In the state of the offset position, the male mold 700 and the female mold 800 are closed. In this state, the molding material is injected from the vertical runner 801 formed on the master mold 800, and the product is molded in the mold. At this time, the abutting portion 220 is formed into a molding position of the material or the edge of the material which needs to be removed by the foot after the molding. After the product is formed, the abutting portion 220 is pressed against the material or the material edge of the product. The abutting portion 220 extends into the material flow path 706, and the barb 221 faces the material flow path 706 on the second mold block 702.

Next, as shown in FIG. 4, after the article 900 is formed, the invention is maintained. The release assist mechanism separates the master 800 from the male mold 700 in a state where the abutment end 220 shown in FIG. 3 is in the abutment position. When the molding material forming product 900 flows into the mold through the vertical runner 801 and the material flow path 706, the material head 910 is also molded in the material flow path 706, at this time, except for the molding material by the grasping pin 707 and the product 900. The adhesion between the product 900 is maintained outside the male mold 700, because the abutment portion 220 extends into the flow path 706, and the undercut 221 faces the flow path 706 on the second mold block 702, thus The material head 910 formed in the material flow path 706 is also held by the abutment portion 220 with the barb 221 to securely hold the product 900 to the male mold 700.

Next, as shown in FIG. 5, the movable rod 300 is moved upward, and the movable rod 300 is lifted up by the movable rod 300, so that the abutting end 220 is away from the second mold piece 702, and the reversed hook 221 is pressed against the product 900. The release position of the 910. Since the angle formed by one side of the barb 221 and the upper surface of the flipping plate 200 is less than 90 degrees, when the flipping plate 200 is released and the barb 221 is pressed against the material head 910 of the product 900, the barb 221 will not be rejected. The product 900 has a head 910 interference. Thereafter, the product 900 is ejected out of the male mold 700 by an ejecting mechanism (not shown) provided in the male mold 700.

According to the release assisting mechanism of the present invention, when the male mold 700 is separated from the master mold 800, the product 900 can be surely held in the male mold 700, and dust contamination is not caused, whereby the product yield can be improved.

While an embodiment of the release assist mechanism of the present invention has been described above, it is not intended to limit the present invention, and the release assist mechanism of the present invention can be implemented in various variations within the scope of the following claims. For example, in the above embodiment, a pair of release assisting mechanisms are provided, and the flipping plate 200 is extended into the material flow path 706 by the abutting end 220, and is barbed by the barb 221 when the product 900 is formed. Article 900 of product 900. However, the number and arrangement position of the release assist mechanism are not limited thereto. For example, a plurality of release assist mechanisms may be provided on other mold cores disposed around the first mold block 701. At this time, the flipping plate 200 protrudes into the first die block 701 with the abutting end 220, and is placed against the position of the article 900 that is not visually exposed and does not affect the functionality (eg, optical characteristics) of the article 900, thereby In the case of the appearance and function of the product 900 not affected, a plurality of release assisting mechanisms are disposed along the periphery of the first mold block 701 to be pressed against the edge of the product 900, so that the effect of the above-mentioned release assisting mechanism can be more effectively exerted. .

In the above embodiment, the release assisting mechanism is only pressed against the product 900 by the barbs 221 of the flipping plate 200 against the end 220. However, as shown in FIG. 6, the depth of the material flow path 706 is greater than the thickness of the flipping plate. When the abutment 220 extends into the flow path 706, in addition to the barb 221, the flipper plate 200 can be used to hold the head 910 (product 900) under the abutment end 220.

In the above embodiment, the fixing base 100 and the flipping plate 200 are separately formed, and then connected by the flip pin 240. However, the shape of the fixing base 100 and the flipping plate 200 is not limited thereto, for example, as shown in FIG. The flipping plate 200 and the fixing base 100 can be integrally formed, and a portion corresponding to the fixing base 100 forms a spherical groove 130. The rotating plate 200 is disposed on the second mold block 702 in cooperation with a spherical fixing member 140. At this time, the spherical groove 130 and the spherical fixing member 140 form a ball joint, and the flipping plate 200 is flipped by the ball joint, and the depth of the recess 703 must accommodate the flipping plate 200 in the releasing position, and the fixed end 210 sinks into the first The depth of the second mold block 702.

In each of the above embodiments, the lifting and lowering of the movable rod 300 and the grasping pin 707 is controlled by the ejector plate coupled to the lower end of the movable rod 300 and the grasping pin 707. For example, the movable rod 300 and the grasping pin 707 can be respectively connected to the different ejector plates. If the movable rod 300 moves up and down in the same direction as the grasping pin 707, as shown in FIG. The pin 707 can be fixed to the same ejector plate 710.

In the embodiment of FIG. 1 to FIG. 6 , the movable rod 300 is coupled between the fixed end 210 and the abutting end 220 of the flipping plate 200 , that is, between the fixed seat 100 and the abutting end 220 , in the embodiment of FIG. 7 . The movable rod 300 is also coupled between the fixed base 100 and the abutting end 220. However, if the flipping plate 200 and the fixing base 100 are in the form of a seesaw formed as shown in FIG. 9, the movable rod 300 and the movable rod 300 are The abutting end 220 can be respectively located on the different side of the fixed seat 100. At this time, the length of the flipping plate 200 and the upper side of the movable rod 300, the side of the flipping plate 200 forms a long slot 230 at the position of the corresponding movable rod 300, and the movable rod 300 The flipping plate actuating portion 310 is formed at the upper end, the flipping plate actuating portion 310 is configured to receive the groove of the flipping plate 200, and the pin hole 311 is formed in the groove wall of the groove, and is inserted into the lifting pin 250 of the pin hole 311. The long groove 230 connects the flipping plate 200 into a groove as the flipping plate actuating portion 310.

In the embodiment of FIG. 9, the movable rod driver 730 disposed on the second mold block 702 is coupled to the movable rod 300, and the movable rod 300 can be controlled differently from the grasping pin 707 according to the opposite direction and the different moving strokes, respectively. Moving up and down to the ground, wherein the movable lever driver 730 can be an actuating member of the pressure cylinder and the piston, the screw, the solenoid valve, or the like. In contrast to the embodiment of FIG. 8, the movable rod 300 moves in the same direction as the catch pin 707. In the embodiment of FIG. 9, when the ejector plate 710 is raised to lift the catch pin 707, the movable rod driver 730 The movable rod 300 is moved downward. At this time, the movable rod 300 is rotated by the flipping plate The actuating portion 310 rotates the flipping plate 200 to move the abutting end 220 away from the second die block 702. Conversely, when the ejector plate 710 is lowered to lower the catch pin 707, the movable lever driver 730 moves the movable lever 300 upward. At this time, the movable rod 300 is used to lift the flipping plate 200, and the rotating flipping plate 200 is closed, so that the abutting end 220 is connected to the second mold block 702.

In the above embodiment, the flipping plate 200 is coupled to the flipping plate actuating portion 310 of the movable lever 300 by the long slot 230 and the lift pin 250. However, the connection type between the flipping plate 200 and the movable lever 300 is not limited thereto, for example. An oblong spherical groove is disposed on the flipper plate 200 instead of the long groove 230, and the spherical pin fixing member is used to replace the lift pin 250 through the oblong spherical groove to be disposed at the upper end of the movable rod, thereby also turning The plate 200 is coupled to the movable lever 300, and the flipper 200 is moved by the lifting movement of the movable lever.

100‧‧‧ fixed seat

110‧‧‧ counterbore

120‧‧‧ flip board connection

130‧‧‧Spherical groove

140‧‧‧Spherical fixtures

200‧‧‧ flip board

210‧‧‧Fixed end

220‧‧‧

221‧‧‧

230‧‧‧Long slot

240‧‧‧ flip pin

250‧‧‧lifting pin

300‧‧‧ activity pole

310‧‧‧ flip board actuation department

311‧‧ ‧ pinhole

R‧‧‧away direction

700‧‧‧Male model

701‧‧‧The first mold block

702‧‧‧Second Mould

703‧‧‧ dent

704‧‧‧ Guide hole

705‧‧‧Feed pin guide hole

706‧‧‧ material flow path

707‧‧‧Feeding pin

708‧‧‧ gate

710‧‧‧Top board

730‧‧‧Moving rod drive

800‧‧‧Female model

801‧‧‧spindle

900‧‧‧Products

910‧‧‧ material head

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing an embodiment of a mold to which a release assisting mechanism of the present invention is applied.

Figure 2 is a partially exploded perspective view of the release assist mechanism in the mold of Figure 1.

In Fig. 3, (a) is a schematic perspective view of the release assisting mechanism in the mold of Fig. 1 at the abutment position, and (b) is a corresponding sectional view.

In Fig. 4, (a) is a schematic perspective view of the molded article of Fig. 3, and (b) is a schematic cross-sectional view.

In Fig. 5, (a) is a schematic perspective view of the release assisting mechanism in the mold of Fig. 4 in the release position, and (b) is a corresponding cross-sectional view.

Fig. 6 is a schematic view showing another embodiment of the release assisting mechanism of the present invention.

Fig. 7 is a schematic view showing another embodiment of the release assisting mechanism of the present invention.

Fig. 8 is a schematic view showing an embodiment in which the movable rod and the grasping pin are fixed to the same ejector plate.

Figure 9 is a schematic illustration of another embodiment of the release assist mechanism of the present invention.

Figure 10 is a schematic view of a conventional pick-up pin with a barb separated from the article.

100‧‧‧ fixed seat

200‧‧‧ flip board

300‧‧‧ activity pole

700‧‧‧Male model

701‧‧‧The first mold block

702‧‧‧Second Mould

707‧‧‧Feeding pin

708‧‧‧ gate

800‧‧‧Female model

801‧‧‧spindle

R‧‧‧away direction

Claims (9)

A release assisting mechanism is provided in cooperation with a mold having a male mold and a female mold, the male mold comprising: a first mold core block, and at least one second mold core block disposed on the first mold The release assisting mechanism comprises: a fixing seat fixed on the second mold block; a flipping plate having a fixed end rotatably connected to the fixing seat, and one of the fixed ends And a movable rod that moves up and down in the axial direction in the second mold block and is coupled to the flipping plate, and the movable rod is connected to the flipping plate so that the abutting end of the flipping plate can be approached One of the second die block is moved between the abutting position and a release position away from the second die block. The release assisting mechanism of claim 1, wherein the abutting end has a barb facing the second die block. The release assisting mechanism of claim 1, wherein a side of the flipping plate forms a long slot extending along the side surface; the upper end surface of the movable rod forms a recess for receiving the flipping plate; a latch extends into the length A slot connects the flipper plate into the recess. The release assisting mechanism of claim 1, wherein the fixing base is integrally formed with the flipping plate, the fixing seat forms a spherical groove, and is disposed on the second die block in cooperation with a spherical fixing member. The release assisting mechanism of claim 1, wherein the flipping plate, the flipping plate, and the movable bar do not extend above the second die block when the flipping plate is in the abutment position. The release assisting mechanism of claim 1, wherein the second mold block is a gate block, the gate block has a material flow path, and the fixed seat is fixed to a side of the flow path of the material head, and When the flipper is in the abutment position, the abutment extends into the flow path of the material. The release assisting mechanism according to claim 6, further comprising a picking pin located in the gate of the gate block and moving up and down in the axial direction. The release assist mechanism of claim 7, wherein the pick pin and the movable rod are fixed to the same ejector plate. A mold having: a male mold comprising: a first mold block; and at least one second mold block disposed around the first mold block; a female mold located at a corresponding position above the male mold, Forming the product between the male mold and the female mold, and molding on the first mold block; and a release assisting mechanism, comprising: a fixing seat fixed on the second mold block; a flipping plate having a fixed end rotatably coupled to the fixing seat and a biasing end opposite to the fixed end; and a movable rod axially moving up and down in the second mold block and connected In the flipping plate, the movable bar is connected to the flipping plate so that the abutting end of the flipping plate can be in a position close to one of the second die block and away from a release position of the second die block. mobile.