Hydraulic part withdrawing device of injection mold

Abstract

The utility model discloses a hydraulic retreating device for an injection mold, and particularly relates to the technical field of injection molds, the hydraulic retreating device comprises a movable mold and a fixed mold mounted on one side of the movable mold, first hydraulic cylinders are mounted in two ends of the fixed mold, and output ends of the two first hydraulic cylinders are arranged in parallel; the output ends of the two first hydraulic cylinders are fixedly connected with the outer wall of the end of the movable mold, a cavity is formed in the side, close to the movable mold, of the middle of the fixed mold, a male mold is arranged on the portion, located on the inner side of the cavity, of the outer wall of the middle of the movable mold, and an injection molding hole communicating with the interior of the cavity is formed in the movable mold. And a hydraulic retreating mechanism is mounted on the side, close to the male die, in the movable die. According to the utility model, a formed workpiece can be conveniently ejected after the mold is opened, and the injection-molded workpiece can be separated from the end of the ejector rod by controlling the operation of the vibration motor to generate high-frequency vibration in the process of ejecting the workpiece after the mold is opened, so that the workpiece can be more effectively withdrawn.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field more specifically, the utility model relates to an injection mold hydraulic ejection device. BACKGROUND

[0002] Injection mold is the important component of plastic injection molding machine (referred to as injection molding machine), is used for the thermoplastic or thermosetting plastic processing into various plastic parts, injection molding process includes material delivery, melting, injection, cooling, opening mould and unloading etc. link, after the cooling and setting of plastic parts, the mold needs to be opened, and then the plastic parts are taken out from the mold, and this process is unloading.

[0003] The traditional injection mold unloading mode often relies on manual operation, which not only consumes time and effort, but also has certain error risk. When unloading manually, improper operation may cause damage to the plastic parts, and even harm to the operator. In addition, with the continuous improvement of the production speed of the injection molding machine, the manual unloading method has been difficult to meet the demand of efficient production. In order to solve the above problems, the hydraulic ejection device emerges as the times require, and the injection mold hydraulic ejection device is a device for automatically unloading plastic parts by using hydraulic principle.

[0004] The existing injection mold hydraulic ejection device is usually a simple hydraulic push to eject the injection molded workpiece, but in actual use, since the ejection surface keeps in contact with the workpiece during the injection molding process, if the workpiece itself is light in weight, there is a certain adhesion between the workpiece and the ejection surface, which is not easy to fall off, thereby causing ejection difficulty and affecting subsequent injection molding. UTILITY MODEL CONTENTS

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides an injection mold hydraulic ejection device.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: an injection mold hydraulic ejection device, comprising a movable mold and a fixed mold installed on one side of the movable mold, first hydraulic cylinders are installed inside both ends of the fixed mold, the output ends of the two first hydraulic cylinders are arranged in parallel, and the output ends of the two first hydraulic cylinders are fixedly connected with the end outer wall of the movable mold, a cavity is arranged at the position of the middle part of the fixed mold close to the movable mold, a male mold is arranged on the inner side of the cavity of the middle outer wall of the movable mold, an injection hole is arranged in the inside of the movable mold and communicated with the inside of the cavity, a cooling channel group is arranged in the inside of the fixed mold close to the outside of the cavity, and a hydraulic ejection mechanism is installed on the side of the inside of the movable mold close to the male mold.

[0007] As a further improvement of the utility model technical scheme, the cooling channel group includes two cooling cavities which are symmetrically arranged at both outer sides of the cavity, and a communication cavity is in communication between the two cooling cavities, the communication cavity is staggered with the position of the injection hole, one end of one of the cooling cavities is in communication with the cooling liquid inlet channel, and the other end of the other cooling cavity is in communication with the cooling liquid outlet channel.

[0008] As a further improvement of the utility model technical scheme, the hydraulic ejecting mechanism includes a movable plate connected to the inside of the movable die, an activity cavity is arranged on the outside of the movable plate in the inside of the movable die in the horizontal direction, a second hydraulic cylinder for driving the horizontal movement of the movable plate is installed on the end wall of the movable die, a limiting assembly is arranged at both end positions of the movable plate in the inside of the movable die, a first ejector rod is fixedly connected to the middle part of the movable plate in the horizontal direction, and one end of the first ejector rod extends to the inside of the male die.

[0009] As a further improvement of the utility model technical scheme, the second hydraulic cylinder is fixedly connected to the movable die through bolts, and the output end of the second hydraulic cylinder is fixedly connected to the outer wall of the movable plate through screws.

[0010] As a further improvement of the utility model technical scheme, the limiting assembly includes a limiting column inserted into the end of the movable plate in the horizontal direction, one end of the limiting column is fixedly connected to the inner wall of the activity cavity, and a limiting block is arranged at the other end of the limiting column, and a limiting hole for the limiting column to pass through is arranged in the inside of the movable plate.

[0011] As a further improvement of the utility model technical scheme, the end of the movable die is provided with a through hole for the first ejector rod and the second ejector rod to pass through, and the inside of the male die is provided with a through hole for the first ejector rod to pass through, which is in communication with the inside of the cavity.

[0012] As a further improvement of the utility model technical scheme, the inside of at least one of the second ejector rods is provided with a fixing cavity, a vibration motor is installed in the inside of the fixing cavity, and a distribution box connected to the vibration motor through wires is installed on the outer wall of the movable plate.

[0013] The utility model has the advantages of:

[0014] 1. By setting the hydraulic eject mechanism, after the mold is opened, the piston rod of the second hydraulic cylinder is controlled to run to push the movable plate to drive the first ejector rod and the second ejector rod to eject the formed workpiece, the limiting assembly is set, on the one hand, the movable plate is stably movable in the horizontal direction, on the other hand, the limiting block can control the contraction stroke of the movable plate, so that the maximum contraction stroke of the movable plate can keep the first ejector rod abutting the edge of the convex mold and the second ejector rod abutting the edge of the movable mold during injection molding, and the injection molding shape of the workpiece is not affected.

[0015] 2. By setting the fixed cavity in the second ejector rod, the vibration motor is installed in the fixed cavity, and the power distribution box connected with the vibration motor through wires is installed on the outer wall of the movable plate. During the process of ejecting the workpiece after the mold is opened, high-frequency vibration is generated by controlling the operation of the vibration motor, so that the injection molded workpiece can be separated from the end face of the ejector rod and is not easy to adhere, thereby more effectively ejecting the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic view after the mold of the utility model is closed.

[0017] Figure 2 It is a structure schematic view after the mold of the utility model is opened.

[0018] Figure 3 It is an installation structure schematic view of the ejector rod in the utility model.

[0019] Figure 4 It is a sectional view of the vibration motor installation position in the utility model.

[0020] The figure mark is: 1, movable mold; 2, fixed mold; 3, first hydraulic cylinder; 4, cavity; 5, injection hole; 6, convex mold; 7, movable plate; 8, movable cavity; 9, limiting column; 10, limiting block; 11, first ejector rod; 12, second ejector rod; 13, power distribution box; 14, fixed cavity; 15, vibration motor; 16, second hydraulic cylinder; 17, cooling cavity; 18, communication cavity; 19, cooling liquid inlet channel; 20, cooling liquid outlet channel; 701, limiting hole. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] As shown in the accompanying drawings Figures 1-4The hydraulic ejection device of the injection mold shown comprises a movable mold 1, a fixed mold 2 installed on one side of the movable mold 1, first hydraulic cylinders 3 installed inside both ends of the fixed mold 2, output ends of the two first hydraulic cylinders 3 arranged in parallel, the output ends of the two first hydraulic cylinders 3 fixedly connected with the end outer walls of the movable mold 1, a cavity 4 arranged at a position close to the movable mold 1 at the middle of the fixed mold 2, a male mold 6 arranged on the inner side of the cavity 4 at the middle outer wall of the movable mold 1, an injection hole 5 arranged inside the movable mold 1 and communicated with the inside of the cavity 4, a cooling channel group arranged inside the fixed mold 2 and close to the outside of the cavity 4, and a hydraulic ejection mechanism installed on one side of the movable mold 1 and close to the male mold 6.

[0023] As shown in the accompanying drawings, Figures 1-2 The cooling channel group comprises two cooling cavities 17 arranged symmetrically on both outer sides of the cavity 4, a communication cavity 18 communicated between the two cooling cavities 17, the communication cavity 18 staggered with the position of the injection hole 5, one end of one of the cooling cavities 17 communicated with a cooling liquid inlet channel 19, and one end of the other cooling cavity 17 communicated with a cooling liquid outlet channel 20, so that after the injection is completed, circulating cooling liquid is introduced around the cavity 4 to cool and form the workpiece in the cavity 4.

[0024] As shown in the accompanying drawings, Figures 1-4As shown, the hydraulic ejection mechanism includes a movable plate 7 connected inside the movable mold 1, the inside of the movable mold 1 is provided with a movable cavity 8 corresponding to the outside of the movable plate 7 in the horizontal direction, and the end wall of the movable mold 1 is provided with a second hydraulic cylinder 16 for driving the horizontal movement of the movable plate 7, and the inside of the movable mold 1 is provided with a limiting assembly at both end positions of the movable plate 7, and the middle part of the movable plate 7 is fixedly connected with a first ejector rod 11 in the horizontal direction, one end of the first ejector rod 11 extends to the inside of the fixed mold 6, and the outer wall of the movable plate 7 is connected with a second ejector rod 12 at both sides of the first ejector rod 11, the second hydraulic cylinder 16 is fixedly connected with the movable mold 1 through bolts, and the output end of the second hydraulic cylinder 16 is fixedly connected with the outer wall of the movable plate 7 through screws, the limiting assembly includes a limiting column 9 inserted in the end of the movable plate 7 in the horizontal direction, one end of the limiting column 9 is fixedly connected with the inner wall of the movable cavity 8, and the other end of the limiting column 9 is provided with a limiting block 10, the inside of the movable plate 7 is provided with a limiting hole 701 for the limiting column 9 to pass through, the end of the movable mold 1 is provided with a through hole for the first ejector rod 11 and the second ejector rod 12 to pass through, the inside of the fixed mold 6 is provided with a through hole for the first ejector rod 11 to pass through, which is communicated with the inside of the cavity 4, and the inside of at least one second ejector rod 12 is provided with a fixing cavity 14, and the inside of the fixing cavity 14 is provided with a vibration motor 15, and the outer wall of the movable plate 7 is provided with a distribution box 13 connected with the vibration motor 15 through wires, so that after the injection molding and cooling forming is completed, the mold is opened between the movable mold 1 and the fixed mold 2, and the piston rod of the second hydraulic cylinder 16 is used to push the movable plate 7 to drive the first ejector rod 11 and the second ejector rod 12 to eject the formed workpiece, and the ejection is completed.

[0025] Working principle: the utility model discloses an injection mold hydraulic ejection device, and the specific structure is as shown in the description Figures 1-4 As shown, the utility model discloses an injection mold hydraulic ejection device, and the specific structure is as shown in the description Figure 2In the shown state, the setting of the limiting assembly makes the stable movement of the movable plate 7 in the horizontal direction, and the limiting block 10 can control the contraction stroke of the movable plate 7, so that the maximum contraction stroke of the movable plate 7 can keep the first ejector rod 11 abutting against the edge of the convex die 6 and the second ejector rod 12 abutting against the edge of the movable die 1 when injection molding is performed, and the injection molding shape of the workpiece is not affected; meanwhile, the fixed cavity 14 is arranged in the second ejector rod 12, the vibration motor 15 is arranged in the fixed cavity 14, the outer wall of the movable plate 7 is provided with the distribution box 13 connected with the vibration motor 15 through wires, and in the process of opening the mold and ejecting the workpiece, the high-frequency vibration generated by controlling the operation of the vibration motor 15 can make the injection molded workpiece separate from the end of the ejector rod, so that the workpiece is more effectively removed.

[0026] Among them, the utility model discloses the embodiment drawing, only relate to the structure of the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of not conflict, the same embodiment and different embodiments of the utility model can be combined with each other;

[0027] Finally: the above only for the preferred embodiment of the utility model has, and does not for limiting the utility model, any modification, equivalent replacement, improvement etc. that is made in the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A hydraulic ejection device for injection molds, comprising a moving mold (1) and a fixed mold (2) mounted on one side of the moving mold (1), wherein a first hydraulic cylinder (3) is installed inside both ends of the fixed mold (2), the output ends of the two first hydraulic cylinders (3) are arranged in parallel, and the output ends of the two first hydraulic cylinders (3) are fixedly connected to the outer wall of the end of the moving mold (1), a cavity (4) is provided in the middle of the fixed mold (2) near the side of the moving mold (1), a punch (6) is provided in the middle outer wall of the moving mold (1) inside the cavity (4), and an injection hole (5) communicating with the inside of the cavity (4) is provided inside the moving mold (1), characterized in that: The inside of the fixed mold (2) is provided with a cooling channel group near the outside of the cavity (4), and the inside of the movable mold (1) is provided with a hydraulic ejection mechanism near one side of the punch (6).

2. The hydraulic ejection device for injection mold according to claim 1, wherein: The cooling channel group comprises two cooling cavities (17) symmetrically arranged on both sides of the cavity (4), and a communication cavity (18) is arranged between the two cooling cavities (17), the communication cavity (18) is staggered with the position of the injection hole (5), one end of one of the cooling cavities (17) is communicated with a cooling liquid inlet channel (19), and the other end of the other cooling cavity (17) is communicated with a cooling liquid outlet channel (20).

3. The hydraulic ejection apparatus for injection mold according to claim 1, wherein: The hydraulic ejection mechanism comprises a movable plate (7) connected to the inside of the movable mold (1), a movable cavity (8) is arranged in the inside of the movable mold (1) corresponding to the outside of the movable plate (7) in the horizontal direction, a second hydraulic cylinder (16) for driving the horizontal movement of the movable plate (7) is arranged on the end wall of the movable mold (1), limit assemblies are arranged at both ends of the movable plate (7) in the inside of the movable mold (1), a first ejector rod (11) is fixedly connected to the middle of the movable plate (7) in the horizontal direction, one end of the first ejector rod (11) extends to the inside of the punch (6), and second ejector rods (12) are connected to the outer wall of the movable plate (7) on both sides of the first ejector rod (11).

4. The hydraulic ejection apparatus for injection mold according to claim 3, wherein: The second hydraulic cylinder (16) is fixedly connected to the movable mold (1) by bolts, and the output end of the second hydraulic cylinder (16) is fixedly connected to the outer wall of the movable plate (7) by screws.

5. The hydraulic ejection apparatus for injection mold according to claim 3, wherein: The limit assembly comprises a limit column (9) inserted into the end of the movable plate (7) in the horizontal direction, one end of the limit column (9) is fixedly connected to the inner wall of the movable cavity (8), and the other end of the limit column (9) is provided with a limit block (10), and the inside of the movable plate (7) is provided with a limit hole (701) for the limit column (9) to pass through.

6. The hydraulic ejection apparatus for injection mold according to claim 3, wherein: The end of the movable mold (1) is provided with a through hole for the first ejector rod (11) and the second ejector rod (12) to pass through, and the inside of the punch (6) is provided with a through hole for the first ejector rod (11) to pass through, which is communicated with the inside of the cavity (4).

7. The hydraulic ejection apparatus for injection mold according to claim 3, wherein: The inside of at least one of the second ejector rods (12) is provided with a fixing cavity (14), the inside of the fixing cavity (14) is provided with a vibration motor (15), and the outer wall of the movable plate (7) is provided with a power distribution box (13) connected to the vibration motor (15) by wires.

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