TW476698B - Mold-clamping device for injection molding - Google Patents

Abstract

The present invention provides a mold-clamping device for injection molding comprising a mold driving means for driving an upper mold member upwardly and downwardly relative to a lower mold member and an ejecting device for driving a knock-out device built in the lower mold member for releasing a molding from the lower mold member after molding, wherein the ejecting device comprises an up-and-down member having an ejector pin penetrating vertically a lower fixing board for mounting the lower mold member thereon and a driving member for moving vertically the up-and-down member, the driving member being placed by the side of the up-and-down member, and has the advantage of making it easy to relocate or move the mold-clamping device.

Description

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 476698 A7 B7 V. Description of the invention () Background of the invention 1. Field of the invention The present invention relates to an injection molding process including injection molding, injection molding, and the like. Mold clamping device 'This mold clamping device includes a mold driving mechanism for driving the upper mold member upward and downward relative to the lower mold member, and an injection device for driving the release device for mold release. 2. Description of the conventional technique FIG. 1 (the conventional technique) is a side view of a conventional mold clamping device using a mold clamping device as an injection molding machine. The mold clamping device 1 includes a clamping mechanism component having a movable plate 11 for mounting an upper mold member 60 thereon and a fixed plate 1 2 for mounting a lower mold member 6 1 thereon. The plate 11 is driven by a mold clamping cylinder 1 mounted on the upper fixing plate 15 〇 ^ ___-driven up and down, and the ejection device 2 includes a plurality of ejection pins 20 and 20 having a vertical penetration through the lower fixing plate 12 The ejection block 30 and the hydraulic cylinder 4 are used to drive the ejection block 30 upward and downward. The ejection block 30 and the hydraulic cylinder 4 are serially combined in a vertical direction. When the molding is performed in a state where the upper mold member 60 and the lower mold member 61 are clamped, the ejection device acts on a preset timing. The film-removing device 7 including the film-releasing pins 71, 71 and the ejection plate 72 is constructed in the lower mold member 61. The ejection plate 72 of the ejection device 7 is ejected upward by the ejection pins 20 and 20 via the hydraulic cylinder 4 of the ejection device 2 so that the mold 5 is ejected by the ejection pins 71 and 71 shown in FIG. 1 and Release from the lower mold member 61. In this example, because the height occupied by the ejection device 2 must include the area where the hydraulic cylinder 4 acts in the vertical direction, as well as the ejection block 30 and the hydraulic cylinder 4, the paper size applies the Chinese National Standard (CNS) A4 specification. (210 X 297 mm) 4 — " -------------------- Order ----- "--- I line (Please read the note on the back first Please fill in this page again) 476698 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (2) Height, when the ejection device 2 is set under the lower fixing plate 12 of the mold clamping device 1, The mold clamping device 1 needs to be bulky. For this reason, as shown in FIG. 1, the position of the surface of the mold clamping device 1 is set and lowered, and the hydraulic cylinder 4 is inserted into the excavation, as shown in FIG. 1. The recesses formed under the ground 9 \ ------- 'one by one ... ... ,,,, ... / "in the cavity 90. This will cause the mold clamping device 1 and used to take out products or the like Good coordination between other related machines. However, because the hydraulic cylinder 4 of the ejection device 2 protrudes downward from the base portion of the mold clamping device 1, when due to the When the mold clamping device 1 is repositioned by changing or reconfiguration of the machine, a new cavity 90 must be formed. Furthermore, because of the need for operations such as disassembling and relocating the ejection device 2, these tasks must be completed on a large scale. Therefore, a large amount of work cost and time are required. Furthermore, because the hydraulic cylinder 4 is placed in the cavity 90, the maintenance / inspection and repair of the ejection device 2 is difficult. Device comprising: a mold driving mechanism for driving the upper mold member to move upward and downward relative to the lower mold member; and an ejection device for driving the film-removing film embedded in the lower mold member to release the film Device. This mold clamping device has a small height occupied by the ejector device, and makes it easy to relocate or move the mold clamp ▼, tight, device. ^ V is used as a first aspect of the present invention to solve the problem. The technical means of the present invention of the above-mentioned problem is that the ejection device includes an upper and lower member having an ejection pin, and the ejection pin is vertically passed through for fixing the lower mold member to the upper and lower fixing members. Zhang scale is applicable to China National Standard (CNS) A4 specification (210 X 297 mm) -------------------- Order --------- h line (Please read the notes on the back before filling this page) 476698 1 \ '

Description (A7 B7 3) plate; and driving member for vertically moving the upper and lower members, the driving member is provided on the upper and lower members according to the above-mentioned means, because the driving mechanism for vertically moving the upper and lower members with ejector pins, It is laid out on the side f of the upper and lower members. The ejection devices are one by one. ^ ..---, ______________... / ,, ------------------ ----- 1 | _ The height occupied is less than the height jl of the conventional ejector. As a result, the entire height of the mold clamping device in which the ejector is installed can also be lowered, and the position of the working surface becomes lower. In addition, because there is no need to form a cavity in the ground, and it is used to set the mold clamping device, the mold clamping device can be easily set and repositioned. As a second aspect of the present invention, the mold clamping device is the mold clamping device described in the first aspect, in which the driving member includes a plurality of cylinders, and the ends of both sides of the upper and lower members are separable from the cylinder. connection. Since the driving member has a plurality of cylinders and the cylinders are connected to both end portions of the upper and lower members, further, the pressure of the hydraulic oil supplied to the cylinders can be low. Because the cylinder is separable, the ejector can be easily repaired and maintained. As a third aspect of the present invention, the mold clamping device is the mold clamping device described in the first and third aspects, wherein the ejection device is provided below the lower fixing plate. In this mold clamping device, since the force in the stripping direction acts on the stripping direction directly facing the mold, only a small amount of force is required to make the stripping from the mold. It is due to the following characteristics of the above structure. Because the height occupied by the ejection device is low, the height of the entire mold clamping device is low. Therefore, the pits that have been formed on the ground become unnecessary. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page)

-«Ϋ 1_1 I 11 ^ MMMm i sip, · n 1 1 ·········································· ϋ · Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by employee consumer cooperatives 476698 Intellectual Property Bureau of the Ministry of Economic Affairs printed by A7 B7 5. Description of the invention (4) 'The mold clamping device is provided in the cavity to lower the position of the active surface of the mold clamping device. Setting up and relocating the mold clamping device becomes easy. In addition to the above effects, in the example of the second aspect, the upper and lower members are stably moved up and down, and the ejector is easily repaired and maintained. In the example of the third aspect, only a small amount of force is required to release the mold from the mold. Other areas of application of the invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, while indicating the preferred embodiment of the present invention, are for illustrative purposes only, because for those skilled in the art, various changes can be made in the spirit and field of the present invention. With modifications becomes obvious. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an example of a conventional mold clamping device; FIG. 2 is a partial cross-sectional view of an ejection device used in a mold clamping device according to an embodiment of the present invention; FIG. 3 is Side view of the ejector; Figure 4 is a partial cross-sectional view of the lower portion of the mold clamping device; Figure 5 is a perspective view of the injection molding equipment; and Figure 6 is a perspective view of the ejection device used in the mold clamping device . Comparison table of main components 1 Mold clamping device 2 Ejection device The paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) ------------------ --Order ----- ·-· Line (Please read the precautions on the back before filling this page) 476698 A7 B7 V. Description of the invention (5 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 3 Upper and lower plates 4 Hydraulic cylinders 5 Molding 6 Injection machine 7 Stripping device 9 Floor 11 Movable plate 12 Lower fixing plate 13 14 Pillar 15 Upper fixing plate 20 Ejector pin ~ 30 Ejector block 40 Hydraulic circuit control 41 Cylinder 42 Hand guard 43 Head / 4 5 lever 46 lever cover 4 7 stopper 60 upper mold member 61 lower mold member 62 bucket 63 injection nozzle 71 release pin Ί α 1 valve ---- ----- Order ----- * — π line (please read the precautions on the back before filling this page) The paper size applies the Chinese National Standard (CNS) A4 specification (210 χ 297 mm) 476698 A7 B7 V. Description of the invention (°) 72 Push-out plate 80 Lift

Tlv (Please read the precautions on the back before filling in this page) 81 Linear drive device 90 Recess 120 Through hole 121 Recess 122 Stopper 601 Hot runner 610 Through hole Description of preferred embodiments -------- -U line · An example of the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 4 and 5, a mold clamping device 1 according to an embodiment of the present invention includes a lower fixing plate 12 on which a lower mold member 61 is mounted, and a movable plate 11 on which an upper mold member 60 is mounted. / And drive vertically toward and away from the lower mold member 61; and the ejection device 2; has an ejection pin 20'20 disposed below the lower fixing plate 12, and after being molded, it is pushed up and embedded in the lower mold member The film release device 7 is used to push the mold 5 out of the film. The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed the mold clamping device 1, as shown in Figs. 4 and 5. The mold clamping device 1 includes a movable plate 11, a lower fixed plate 12, and an ejector 2 and is separately packaged. —---- '~ —〆Contains the upper fl fixed plate 1 5 ″ supported by the four corners standing around the lower fixed plate 12 2 ′, supported by M 14 ^ 4; and hydraulic mold clamping The cylinder 10 is a driver of the movable plate 11. The movable plate 11 is installed in the output and output of the mold clamping cylinder 10, and drives upwards and downwards corresponding to the role of the mold clamping cylinder. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 (Mm) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 476698 A7 _____ Β7 _____ 5. Description of Invention (7). At the predetermined positions in the lower fixing plate 12 are provided:% through holes-lj0, J20, the following ejection pins 20, 20 of the ejection device, slide through this hole; '~~, ~~- —- One ~ '.... One―, one and the recesses 121, 121' are used to receive the heads 4, 3, 4 3 of the hydraulic cylinders 4, 4 among them 'When the hydraulic cylinders 4, 4 are raised, it is the ejection device 2 Drive. As for the stripping device 7 ′, as shown in FIG. 4, the stripping device 7 is embedded in the mold member 6 1 fixed below the lower fixing plate 12, which includes: stripping pins 7 1, 7 1, The surface of the lower mold member 61 protrudes in synchronization with the ejection device 2 to be described later to push out the mold 5; and the ejection plate 72 has a film release pin. The release pin 7 1 __, 7 1 slides through the through holes 6 1 0, 6 1 0 formed in the lower mold member 6 1, and is set so that when the ejection plate 72 is located at the bottom position, the end of the release pin 72 The part fits the surface of the lower mold member 61. Since the ejection plate 72 is a recessed portion formed in the bottom surface of the lower mold member 61, the ejection plate may suffer from some strokes from its bottom position. g 〆 With regard to the ejection device 2, as shown in FIGS. 2 and 3, the ejection device 2 includes a plurality of rod-shaped ejection pins 20, 20 above and below the plate 3, and two upper and lower sides connected to the upper and lower plates 3. Hydraulic cylinder 4: The upper and lower plates 3 are rectangular plates, and both sides of the upper and lower plates 3 form shrinkage portions, and each of the shrinkage portions engages the main body of the hydraulic cylinder 4 and is bolted to a hand guard portion 42 suspended above the center of the main body of the hydraulic cylinder. The ejector pins 20 and 20 are arranged on the upper and lower plates 3 at a predetermined interval in a meandering manner. The ejector pin is arranged so that it is connected to the ejection plate 72 of the ejection device 7 embedded in the lower mold member 61 and is movable up and down. Hydraulic cylinder 4 includes a rod connected to a piston installed in hydraulic cylinder 45 ^ The paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) ^ (Please read the precautions on the back before filling this page)

476698 A7 B7 V. Description of the invention (8 ′ and the hydraulic circuit for supplying hydraulic oil to the hydraulic cylinder 4. The rod cover 46 covering the rod 45 is fixed to the mounting plate 23, which is the base of the mold clamping device 1. The pressure of the hydraulic oil supplied to the hydraulic cylinder 4 is controlled by the hydraulic line control valve. Under the normal output state in which the rod 45 is automatically removed, the cylinder 41 moves upwards until the upper and lower plates 3 contact the lower fixed plate 1 2 move

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. In a state where the rod 45 is moved back into the cylinder 41 and output, the bottom block 44 of the cylinder 41 contacts the stopper 47 mounted on the rod cover 46. The four guide posts 21, 21 as the guides of the upper and lower plates 3 pass through the four corners of the upper and lower plates. The end of the guide post is fixed to the lower fixing plate 12 of the mold clamping device 1, and the bottom thereof is fixed to the mounting plate 23. The implementation of the use of the mold clamping device will be described by taking the above-mentioned mold clamping device 1 and the injection machine 6 as examples, and then describing the implementation of the injection mold. As shown in FIG. 5, the injection machine 6 is a horizontal injection type injection machine provided with a barrel 62 having an injection nozzle for injecting molten resin into a heat flow, and the hot runner is an upper mold member 60 formed in the mold clamping device 1. in. When the molding starts, the movable plate 11 is moved downward by the mold clamping cylinder 10. When the upper mold member 60 and the lower mold member 61 reach a preset distance, the movable plate 11 is temporarily stopped. Next, the barrel 62 is moved so that the injection nozzle 63 of the injection machine 6 is joined to form an inlet of the hot runner 60 1 in the upper mold member 60, and then the molten resin is injected. When a preset amount of melted resin is supplied to the inside (cavities) of the mold members 60, 61, the injection is stopped and then the injection machine 6 is ^ i.e. the mold (please read the precautions on the back before filling this page) ) Order ----- · --- line · This' paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 476698 A7 B7 V. Description of the invention (9) The clamping device 1 is separated. Thereafter, the stationary movable member 11 is further moved downward 'and the mold members 60, 61 are completely brought into close contact. Therefore, the resin in the mold member diffuses into the cavity and is formed under pressure. After the formed resin is completely cured, the moving plate 11 is moved upward to separate the upper mold member 60 from the lower mold member 6 1. At this time, the mold 5 formed by curing the resin is supported on the lower mold member 61. In the next step, when the hydraulic oil in the normal output state is supplied to the ejection device 2 through the hydraulic pressure line control valve 40. When the cylinder 4 v 4 is pressed, the lever 45 is removed from the cylinder 4. As a result, the circle is pushed up, and the lower plate 3 mounted above the cylindrical hand guard portion 42 is also raised, as shown by the dotted line in FIG. 4. Therefore, the ejection pins 20, 20 are pushed out from the lower fixing plate 12, and the pushing-out plate 72 of the film release device 7 embedded in the lower mold member 61 is pushed up. Therefore, the ejection pins 71, 71 standing on the ejection plate 72 are projected from the surface of the lower mold member 61, and the mold 5 supported on the lower mold member is pushed upward to release the film. After the mold is removed from the film, the hydraulic oil supply circuit is reversed by the hydraulic circuit control valve 40 'to bring the hydraulic cylinders 4, 4 into the backward output state, so the rod 45 is moved backward into the cylinder 41. In Ningguo, the release pins 7 1 and 7 1 protruding from the lower mold member 61 are moved downward to the positions where their ends fit on the surface of the lower mold member 6 丨. Although in the foregoing embodiment, the hydraulic cylinder 4 is used as a drive for the upper and lower plates 3 of the ejection device 2 for vertical movement, the cam (please read the precautions on the back before filling this page). Order ----- ΓΙ : Line. Air cylinders or other drives of the printing cooperatives, rack systems and linear motor systems of the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs _ ^^ 利

This paper size is in accordance with Chinese National Standard (CNS) A4 specification (210 X 297 public love) 476698 A7 _____B7 __ V. Description of the invention (cleverly used as a drive. Moreover, it is not necessary to make the entire drive in a position with ejector pin 20 The side of the upper and lower plate 30. The driver can be a part of which is located on the side and its 3S two outside and down ± the part is on the 1N side position 8 with 3 mounting plates including the upper drive line of the lower drive 3M3 shift

Display area 1 is straight as an example, and (and one with \ 1X 8 Γ Γ -i ^ i 1_1 11 mmmmMm Hi an a · ^ — ϋ n I an Mat · ϋ -1 · — ϋ I «ϋ ^ ^ I i · — II ϋ ^ u— i_l (Please read the notes on the back before filling out this page) IP cable · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper applies Chinese National Standard (CNS) A4 (210 X 297) %)

Claims (1)

476698 A8 B8 C8 D8, patent application scope 1. A mold clamping device for injection molding, comprising: a mold driving mechanism for driving the upper mold member to move upward and downward relative to the lower mold member; and an ejection device for The driving device is embedded in the lower mold member to remove the film from the lower mold member after molding; wherein the ejection device includes: an upper and lower member having ejection pins, and the ejection pins are vertical. The ground is used to install the lower mold member on the upper and lower fixing plates; and the driving member is used to vertically move the upper and lower members. The moving member is a house ^ m ~ my The tightening device, wherein the ejection device is disposed below the lower fixing plate. 3. The mold clamping device according to item 1 of the patent application scope, wherein the driving member includes a plurality of cylinders, and the ends of both sides of the upper and lower members are detachably connected to the cylinder. 4. The mold clamping device according to item 3 of the patent application scope, wherein the ejection device is arranged below the lower fixing plate. ------—, — h ^ w ------- 丨 order ----- one --- ^ line (please read the notes on the back before filling this page) Intellectual Property Bureau of the Ministry of Economic Affairs The paper size printed by the employee consumer cooperative is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm)