Mold closing device for injection molding machine

Abstract

The utility model belongs to the technical field of injection molding machines, and relates to a mold closing device for an injection molding machine, which comprises a case, a turntable is rotatably connected in the top surface of the case, two lower mold plates are symmetrically and fixedly connected at the top of the turntable, counterbores are formed in the bottom ends of the two lower mold plates, and ejector rods are hermetically and slidably connected in the two counterbores. The ejector rods vertically penetrate through the rotary disc in a sliding mode, the two ejector rods are connected with the rotary disc through springs, an injection molding part is arranged over the machine box, an upper mold plate is arranged at the discharging end of the injection molding part and matched with a lower mold plate for mold closing, a lifting assembly is arranged on the machine box, and the lifting assembly drives the injection molding part to vertically move up and down. A boss is fixedly arranged in the machine box, and a protruding block abuts against the bottom ends of the two ejector rods in a matched mode. The mold has the advantages that when the ejector rod moves to the boss, the boss pushes the ejector rod upwards, so that the ejector rod pushes a product formed in the lower mold plate upwards, and the product is automatically demolded.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection molding machine technical field relates to a kind of mold clamping devices for injection molding machine. BACKGROUND

[0002] Injection molding machine is the main molding equipment of thermoplastic or thermosetting plastic into various shapes of plastic products using plastic molding mold. Injection molding machine needs to use mold clamping device when carrying out injection molding, to ensure that the mold can be reliably closed during material injection, to prevent material leakage.

[0003] The mold clamping device for injection molding machine disclosed in Chinese patent CN215151537U includes a first fixed plate, which connects the components. The middle part of the first fixed plate is slidingly connected with an outer connecting box. The outer connecting box is connected with the matching components outside to provide the power required when the mold clamping device is in use. One end of the outer connecting box penetrates the first fixed plate and is fixedly connected with a horizontal connecting rod. The horizontal connecting rod connects the components to transmit the power transmitted by the outer connecting box. An installation groove is formed in the inner part of the outer connecting box, and a power rod is fixedly connected in the installation groove.

[0004] The mold clamping device opens or closes the mold by moving the upper mold plate up and down. After injection molding, the lower mold plate is installed between the two supporting rods, making it inconvenient to directly demold the product.

[0005] To solve the above problems, the utility model provides a mold clamping device for injection molding machine. UTILITY MODEL CONTENTS

[0006] To solve the problems in the background art, the utility model provides a mold clamping device for injection molding machine.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme: a machine case is provided, a turntable is rotatably connected to the top surface of the machine case, two lower mold plates are symmetrically fixedly connected to the top of the turntable, a counterbore is formed at the bottom end of each lower mold plate, a jack rod is sealingly and slidingly connected to the inside of each counterbore, the jack rod vertically slides through the turntable, and the two jack rods are connected to the turntable through springs.

[0008] An injection molding part is provided above the machine case, an upper mold plate is provided at the discharge end of the injection molding part, the upper mold plate cooperates with the lower mold plate to close the mold, a lifting assembly and a rotating assembly are provided on the machine case, the lifting assembly drives the injection molding part to vertically move up and down, and the rotating assembly drives the turntable to rotate.

[0009] A boss is fixedly provided inside the machine case, and the bottom end of each jack rod abuts against the boss.

[0010] Further, the lifting assembly comprises two first air cylinders and one second air cylinder, bottom ends of the first air cylinders and the second air cylinder are fixedly connected to the inner bottom surface of the cabinet, top ends of the two first air cylinders are fixedly penetrated through the top surface of the cabinet, the second air cylinder is slidably penetrated through the middle part of the rotating disc, top ends of output ends of the two first air cylinders and the second air cylinder are fixedly connected with the same lifting platform, and the injection molding part is arranged on the lifting platform.

[0011] Further, the injection molding part comprises an injection molding machine body, the injection molding machine body is fixedly connected to the top of the lifting platform, an injection molding pipe is fixedly connected to the injection port of the injection molding machine body, the injection molding pipe is fixedly penetrated through the lifting platform, and an upper die plate is fixedly connected to the bottom end of the injection molding pipe.

[0012] Further, the rotating assembly comprises a motor, an inner support plate is fixedly connected to the cabinet, the motor is fixedly connected to the top of the support plate, and a gear is fixedly sleeved on the output shaft of the motor.

[0013] The bottom end of the rotating disc extends to the inside of the cabinet, a gear ring is fixedly sleeved on the outer surface of the bottom part of the rotating disc, and the gear ring is engaged with the gear.

[0014] Further, the top end of the counterbore is communicated with the injection molding cavity of the lower die plate, and the spring is sleeved on the jacking rod.

[0015] A fixed platform is fixedly sleeved on the outer surface of the bottom part of the jacking rod, the top end of the spring is fixedly connected to the bottom surface of the rotating disc, and the bottom end of the spring is fixedly connected to the top of the fixed platform.

[0016] Further, the top part of the boss is symmetrically provided with two arc surfaces, and the two arc surfaces are gradually inclined downward from one end close to the middle part of the boss to the other end.

[0017] The bottom ends of the two jacking rods are both semi-spherical, and the bottom ends of the jacking rods are slidably arranged on the two arc surfaces.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The mold closing device for the injection molding machine is provided with the boss, when the two lower die plates are driven to rotate by the rotating disc, the two jacking rods are driven to rotate together, when the jacking rods move to the boss, the boss pushes the jacking rods upward, the jacking rods slide upward in the counterbores, the jacking rods push the products formed in the lower die plates upward, and the products are automatically demolded.

[0020] 2. The mold closing device for the injection molding machine is provided with the jacking rods, when the jacking rods push the products upward to demold, the fixed platforms are driven to move upward and compress the springs, after demolding, the jacking rods gradually move away from the boss, the springs pull the jacking rods downward, the top ends of the jacking rods move into the counterbores, and the injection molding is continuously carried out, so that the degree of automation is high. DRAWINGS

[0021] Figure 1 is a three-dimensional structure schematic view of the utility model;

[0022] Figure 2 is a structure schematic view of the utility model

[0023] Figure 3 is a structure schematic view of the utility model Figure 2 A part amplification.

[0024] In the figure: 1, the machine case;2, the rotating disc;3, the first cylinder;4, the second cylinder;5, the lifting platform;6, the injection molding machine body;7, the injection molding pipe;8, the upper mold plate;9, the gear;10, the support plate;11, the motor;12, the boss;13, the ejector rod;14, the gear ring;15, the counterbore;16, the fixed table;17, the spring;18, the lower mold plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to 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 fall within the protection scope of the utility model.

[0026] As Figures 1-3 shown, the utility model adopts the technical scheme as follows: a mold closing device for injection molding machine, including the machine case 1, the top surface of the machine case 1 is rotationally connected with the rotating disc 2.

[0027] The rotating assembly is arranged on the machine case 1, and the rotating assembly drives the rotating disc 2 to rotate.

[0028] The rotating assembly includes the motor 11. The support plate 10 is fixedly connected inside the machine case 1, and the motor 11 is fixedly connected to the top of the support plate 10. The output shaft of the motor 11 is fixedly sleeved with the gear 9. Start the motor 11, and the output shaft of the motor 11 rotates to drive the gear 9 to rotate.

[0029] The bottom end of the rotating disc 2 extends to the inside of the machine case 1. The gear ring 14 is fixedly sleeved on the outer surface of the bottom of the rotating disc 2, and the gear ring 14 is engaged with the gear 9. The gear 9 rotates to drive the gear ring 14 to rotate, so that the rotating disc 2 rotates.

[0030] The top of the rotating disc 2 is symmetrically fixedly connected with two lower mold plates 18, and the bottom ends of the two lower mold plates 18 are provided with counterbore holes 15. The top ends of the counterbore holes 15 are communicated with the injection molding cavities of the lower mold plates 18. The interiors of the two counterbore holes 15 are sealingly and slidably connected with top rods 13, and the top rods 13 vertically slide through the rotating disc 2. The top rods 13 seal the counterbore holes 15, so that the injection molding material is molded at the top ends of the top rods 13.

[0031] The two top rods 13 are connected with the rotating disc 2 through springs 17, and the springs 17 are sleeved on the top rods 13.

[0032] The outer surface of the bottom of the top rod 13 is fixedly sleeved with a fixed table 16, the top end of the spring 17 is fixedly connected to the bottom surface of the rotating disc 2, and the bottom end of the spring 17 is fixedly connected to the top of the fixed table 16. In the initial state, the spring 17 pushes the fixed table 16 downward, so that the top end of the top rod 13 is located in the counterbore hole 15, and the top surface of the top rod 13 is flush with the bottom surface of the injection molding cavity of the lower mold plate 18.

[0033] An injection molding part is arranged above the case 1, and an upper mold plate 8 is arranged at the discharging end of the injection molding part. The upper mold plate 8 cooperates with the lower mold plate 18 to perform mold closing. The case 1 is provided with a lifting assembly, and the lifting assembly drives the injection molding part to vertically move up and down. The injection molding part drives the upper mold plate 8 to move downward, and the upper mold plate 8 is moved to the top of the lower mold plate 18.

[0034] The lifting assembly includes two first air cylinders 3 and one second air cylinder 4, and the first air cylinders 3 and the second air cylinder 4 are vertically arranged. The bottom ends of the first air cylinders 3 and the second air cylinder 4 are fixedly connected to the inner bottom surface of the case 1, the top ends of the two first air cylinders 3 are fixedly penetrated through the top surface of the case 1, and the second air cylinder 4 is slidingly penetrated through the middle part of the rotating disc 2. The rotating disc 2 can rotate outside the second air cylinder 4.

[0035] The top ends of the output ends of the two first air cylinders 3 and the second air cylinder 4 are fixedly connected with the same lifting table 5. The two first air cylinders 3 and the second air cylinder 4 cooperate to drive the lifting table 5 to move upward or downward. The injection molding part is arranged on the lifting table 5, so that the lifting table 5 drives the injection molding part to move up and down.

[0036] The injection molding part includes an injection molding machine body 6, the injection molding machine body 6 is fixedly connected to the top of the lifting table 5, and an injection molding pipe 7 is fixedly connected at the injection molding port of the injection molding machine body 6. The injection liquid on the injection molding machine body 6 is discharged through the injection molding pipe 7. The injection molding pipe 7 is fixedly penetrated through the lifting table 5, and the upper mold plate 8 is fixedly connected to the bottom end of the injection molding pipe 7. The inner cavity of the upper mold plate 8 is communicated with the end part of the injection molding pipe 7, so as to inject the upper mold plate 8 and the lower mold plate 18 through the injection molding pipe 7.

[0037] The inside of the case 1 is fixedly provided with a boss 12, which is fixedly connected to the top of the support plate 10. The boss 12 is in abutting cooperation with the bottom ends of the two top rods 13. When the rotating disc 2 drives the top rods 13 to move, the bottom ends of the top rods 13 will move to the boss 12.

[0038] The top of the boss 12 is symmetrically provided with two arc surfaces, both of which gradually incline downward from one end close to the middle of the boss 12 to the other end. So that the middle of the boss 12 is the highest position.

[0039] The bottom ends of the two top rods 13 are both provided in a semispherical shape, and the bottom ends of the top rods 13 are slidingly arranged on the two arc surfaces. The bottom ends of the top rods 13 slide on the arc surfaces, and under the action of the springs 17, the top rods 13 will move upward or downward along the arc surfaces.

[0040] Working principle:

[0041] In use, the motor 11 is started, the output shaft of the motor 11 drives the gear 9 to rotate, the gear 9 drives the gear ring 14 to rotate, and the rotating disc 2 rotates. The rotating disc 2 drives the two lower mold plates 18 to rotate.

[0042] When the lower mold plates 18 rotate, they will drive the top rods 13 to rotate, and the bottom end of one of the top rods 13 will rotate to the arc surface of the boss 12. The top rod 13 will first move upward along one arc surface, and the arc surface will push the top rod 13 to move upward. The top end of the top rod 13 will protrude into the injection cavity of the lower mold plate 18, and at the same time, the fixed table 16 will move upward and compress the spring 17.

[0043] When the top rod 13 moves to the middle of the boss 12, the top rod 13 rises to the highest. Then the top rod 13 slides to the other arc surface, and under the downward thrust of the spring 17, it will push the fixed table 16 and the top rod 13 to move downward along the arc surface, until the top end of the top rod 13 moves into the counterbore 15, and returns to the initial state. Until one of the lower mold plates 18 corresponds to the upper mold plate 8, the rotating disc 2 stops rotating.

[0044] The first cylinder 3 and the second cylinder 4 are started, and the first cylinder 3 and the second cylinder 4 cooperate to drive the lifting platform 5 to move downward, driving the injection molding machine body 6, the injection pipe 7, and the upper mold plate 8 to move downward. Until the upper mold plate 8 moves to the top of the corresponding lower mold plate 18 to close the mold.

[0045] After the mold is closed, the material in the injection molding machine body 6 enters the injection cavity of the lower mold plate 18 through the injection pipe 7, and the material will fall on the top of the top rod 13. After the injection is completed, cooling is carried out.

[0046] After the material is cooled and formed, the first cylinder 3 and the second cylinder 4 push the lifting platform 5 to move upward. The upper mold plate 8 moves away from the lower mold plate 18, and at this time, the formed product is located in the lower mold plate 18 and on the top of the top rod 13.

[0047] The rotation of the turntable 2 is driven by the motor 11, so that the top rod 13 with the product rotates to the boss 12. In order to push the product upward by the top rod 13, the product is moved out of the lower mold plate 18 for demolding. At the same time, another lower mold plate 18 without injection molding is rotated to correspond to the upper mold plate 8, for the next injection molding.

[0048] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A clamp apparatus for an injection molding machine characterized by: Including the case (1), the top surface of the case (1) is rotatably connected with the rotating disc (2), the top of the rotating disc (2) is fixedly connected with two lower mold plates (18), the bottom end of the two lower mold plates (18) is provided with a countersunk hole (15), the inside of the two countersunk holes (15) is slidably connected with a ejector rod (13), the ejector rod (13) vertically slides through the rotating disc (2), the two ejector rods (13) are connected with the rotating disc (2) through the spring (17); The upper mold plate (8) is provided on the discharge end of the injection molding part, the upper mold plate (8) is matched with the lower mold plate (18) to perform mold closing, the case (1) is provided with a lifting assembly and a rotating assembly, the lifting assembly drives the injection molding part to vertically move up and down, and the rotating assembly drives the rotating disc (2) to rotate; The inside of the case (1) is fixedly provided with a boss (12), and the boss (12) is in abutting cooperation with the bottom end of the two ejector rods (13).

2. The clamp apparatus for an injection molding machine according to claim 1, characterized by: The lifting assembly comprises two first air cylinders (3) and a second air cylinder (4), the bottom end of the first air cylinder (3) and the second air cylinder (4) is fixedly connected to the inner bottom surface of the case (1), the top end of the two first air cylinders (3) is fixedly penetrated through the top surface of the case (1), the second air cylinder (4) slides through the middle part of the rotating disc (2), and the top end of the output end of the two first air cylinders (3) and the second air cylinder (4) is fixedly connected with the same lifting platform (5), and the injection molding part is arranged on the lifting platform (5).

3. The clamp apparatus for an injection molding machine according to claim 2, characterized by: The injection molding part comprises an injection molding machine body (6), the injection molding machine body (6) is fixedly connected to the top of the lifting platform (5), the injection molding port of the injection molding machine body (6) is fixedly connected with an injection molding pipe (7), the injection molding pipe (7) is fixedly penetrated through the lifting platform (5), and the upper mold plate (8) is fixedly connected to the bottom end of the injection molding pipe (7).

4. The clamp apparatus for an injection molding machine according to claim 1, characterized by: The rotating assembly comprises a motor (11), the inside of the case (1) is fixedly connected with a supporting plate (10), the motor (11) is fixedly connected to the top of the supporting plate (10), and a gear (9) is fixedly sleeved on the output shaft of the motor (11); The bottom end of the rotating disc (2) extends to the inside of the case (1), a gear ring (14) is fixedly sleeved on the outer surface of the bottom of the rotating disc (2), and the gear ring (14) is engaged with the gear (9).

5. The clamp apparatus for an injection molding machine according to claim 1, characterized by: The top end of the countersunk hole (15) is communicated with the injection molding cavity of the lower mold plate (18), and the spring (17) is sleeved on the ejector rod (13); The outer surface of the bottom of the ejector rod (13) is fixedly sleeved with a fixed table (16), the top end of the spring (17) is fixedly connected to the bottom surface of the rotating disc (2), and the bottom end of the spring (17) is fixedly connected to the top of the fixed table (16).

6. The clamp apparatus for an injection molding machine according to claim 1, characterized by: The top of the boss (12) is symmetrically provided with two arc surfaces, and the two arc surfaces are gradually inclined downward from one end close to the middle part of the boss (12) to the other end; The bottom end of the two ejector rods (13) is provided in a semispherical shape, and the bottom end of the ejector rod (13) is slidably arranged on the two arc surfaces.

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