Automatic positioning device of limiting ejector pin injection molding machine

Abstract

The utility model discloses an automatic positioning device of a limiting ejector pin injection molding machine, which relates to the technical field of injection molding machine devices and comprises an injection molding machine main body. According to the automatic positioning device for the limiting ejector pin injection molding machine, the position of the movable mold can be positioned by arranging the positioning sensor at the fixed mold, the mold closing position of the movable mold and the fixed mold is ensured to be accurate, and the qualification rate of injection molding workpieces is improved; by precisely limiting the moving length of the ejector pin, it can be ensured that a product cannot be damaged due to excessive ejection of the ejector pin in the demolding process, the defects of ejection whitening, ejection breaking and the like on the surface of the product can be avoided, the appearance and size precision of the product is ensured, and the use requirement is met; therefore, the ejector pin piece is prevented from colliding with a mold or other parts of an injection molding machine, and abrasion and damage to the mold and equipment are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine device technical field, concretely is a kind of automatic positioning device of limiting ejector pin injection molding machine. BACKGROUND

[0002] In the injection molding production field, the performance of injection molding machine is directly related to product quality and production efficiency, which mainly includes movable die, fixed die, ejector pin and driving unit for driving the movement of ejector pin. After injection molding is completed, the driving unit can drive the ejector pin to move and eject the molded product.

[0003] The connection mode of the existing injection molding machine ejector pin and driving unit is relatively traditional, and generally lacks effective limiting components. During the demolding process, the extension length of the ejector pin is difficult to control accurately, and the ejector pin often overejects, frequently collides with the mold or other parts of the injection molding machine, accelerates the wear and damage of the mold and equipment, and shortens the service life of the equipment. This greatly harms the surface quality of injection molded products and easily causes defects such as surface whitening and breaking, seriously affecting the appearance and dimensional accuracy of the products, and it is difficult to meet the increasingly stringent use requirements of injection molded products today. To address the shortcomings of the prior art, we propose a kind of automatic positioning device of limiting ejector pin injection molding machine to solve the above problems. SUMMARY

[0004] To achieve the above purpose, the utility model realizes the following technical scheme: an automatic positioning device of limiting ejector pin injection molding machine, comprising an injection molding machine main body, an injection molding assembly is arranged on the top of the injection molding machine main body, fixed dies and movable dies are arranged on both sides of the inside of the injection molding machine main body, an ejector pin piece is arranged in the fixed die, a first driving cylinder is arranged on one side of the ejector pin piece, a positioning sensor is arranged at the fixed die, the positioning sensor positions the fixed die, one end of the ejector pin piece is at the same horizontal plane as the surface of the fixed die, and the other end of a plurality of ejector pin pieces is fixedly connected with a connecting plate penetrating through the fixed die.

[0005] A limiting component is arranged at the connecting plate, and the limiting component limits the sliding position of the connecting plate.

[0006] Preferably, the limiting component is composed of a limiting plate and a driving assembly, the limiting plate is installed between the connecting plate and the fixed die, the driving assembly is installed on the top of the limiting plate, and the driving assembly drives the limiting plate to slide.

[0007] Preferably, a limiting frame is fixedly connected to the outer wall of the fixed die, the limiting plate and the connecting plate are slidingly connected inside the limiting frame, and the first driving cylinder is fixedly installed on the inner wall of one side of the injection molding machine main body.

[0008] Preferably, the output end of the first driving cylinder is fixedly connected with the connecting plate through the limiting frame, and the limiting plate is slidingly sleeved on the outer peripheral wall of the plurality of ejector pins.

[0009] Preferably, the driving assembly comprises a fixed frame, a rotary motor, a transmission screw rod and a driving piece, the fixed frame is fixedly installed at the top of the limiting frame, the rotary motor is fixedly installed on the outer wall of the fixed frame, and the output end of the rotary motor is fixedly connected with the transmission screw rod.

[0010] Preferably, the transmission screw rod is rotationally connected in the fixed frame, the driving piece is slidingly sleeved on the outer peripheral wall of the transmission screw rod, and the driving piece is fixedly connected with the limiting plate.

[0011] Preferably, the injection molding assembly comprises an injection molding box and injection molding pipes, the injection molding box is installed at the top of the injection molding machine body, the injection molding pipes are installed in the movable mold, and one end of the plurality of injection molding pipes is connected with the inside of the injection molding box through the connecting pipe.

[0012] Preferably, the side inner wall of the injection molding machine body is fixedly connected with a second driving cylinder, the output end of the second driving cylinder is fixedly connected with the movable mold, the bottom of the movable mold is fixedly connected with positioning blocks, and the positioning blocks are slidingly connected at the top inside of the injection molding machine body.

[0013] The utility model discloses a kind of automatic positioning devices of limiting ejector pin injection molding machine, and it has the beneficial effects as follows: the automatic positioning device of limiting ejector pin injection molding machine, the position of movable mold is positioned by being provided with positioning sensor at fixed mold, ensure that movable mold and fixed mold are accurate in die position, improve injection molding workpiece qualification rate, simultaneously, multiple ejector pins are connected with connecting plate, and limiting assembly is provided at connecting plate, and then the extension length of multiple ejector pins can be accurately positioned, by accurately limiting the moving length of ejector pin, it can be ensured that product is not damaged in demolding process due to ejector pin excessive ejection, product surface can be avoided to appear defects such as white and broken, the appearance and dimensional accuracy of product are guaranteed, meet the needs of use, so as to avoid that ejector pin and other components of injection molding machine collide, reduce the abrasion and damage of mold and equipment. ACCURACY OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0015] Figure 1 It is a whole structure schematic diagram of the present application.

[0016] Figure 2 This is a schematic diagram showing the installation position of the mold fixing and limiting components of this utility model;

[0017] Figure 3 This is a schematic diagram of the moving mold structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the limiting frame of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the ejector pin after telescoping.

[0020] Figure 6 This is a schematic diagram of the structure after the connecting plate and the limiting plate of this utility model are connected;

[0021] Figure 7 This is a schematic diagram of the connection structure between the drive component and the limiting plate of this utility model.

[0022] In the diagram: 1. Injection molding machine body; 2. Injection molding assembly; 201. Injection box; 202. Injection tube; 3. Fixed mold; 4. Moving mold; 401. Second drive cylinder; 402. Positioning block; 5. Ejector pin; 6. First drive cylinder; 7. Positioning sensor; 8. Limiting assembly; 801. Limiting plate; 802. Drive assembly; 8021. Fixing frame; 8022. Rotary motor; 8023. Transmission screw; 8024. Drive component; 9. Connecting plate; 10. Limiting frame. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0025] This utility model discloses an automatic positioning device for a limiting ejector pin injection molding machine.

[0026] According to the appendix Figures 1-7As shown, including injection molding machine body 1, the top of injection molding machine body 1 is provided with injection molding assembly 2, the inside of injection molding machine body 1 is provided with fixed mold 3 and movable mold 4 respectively, the inside of fixed mold 3 is provided with ejector pin 5, one side of ejector pin 5 is provided with first driving cylinder 6, fixed mold 3 is provided with positioning sensor 7, positioning sensor 7 positions the position of fixed mold 3, the model of positioning sensor 7 is SCI055, which can automatically position the position of movable mold 4, detect whether the position of movable mold 4 is located on one side of fixed mold 3, ensure the normal operation of injection molding, one end of ejector pin 5 is in the same horizontal plane with the surface of fixed mold 3, the other end of a plurality of ejector pins 5 is fixedly connected with connecting plate 9 through fixed mold 3; before injection, first, the position of movable mold 4 is automatically detected by positioning sensor 7, after determining that the position is correct, the second driving cylinder 401 is started, the second driving cylinder 401 drives movable mold 4 to move to one side of fixed mold 3 to close the mold, then the injection material is added between movable mold 4 and fixed mold 3 through injection pipe 202 to complete the injection work, finally, under the cooperation of second driving cylinder 401, movable mold 4 moves away from fixed mold 3, first driving cylinder 6 works to drive ejector pin 5 to slide and connect in the inside of fixed mold 3, the injection workpiece is separated from the surface of fixed mold 3 through a plurality of ejector pins 5, and the demolding work is realized.

[0027] Limiting assembly 8 is arranged at connecting plate 9, limiting assembly 8 limits the sliding position of connecting plate 9, during demolding, the moving length of ejector pin 5 can be adjusted according to actual needs, the needs of use are met, so that the collision between ejector pin 5 and mold or other parts of injection molding machine is avoided, and the wear and damage of mold and equipment are reduced.

[0028] Limiting assembly 8 is composed of limiting plate 801 and driving assembly 802, limiting plate 801 is installed between connecting plate 9 and fixed mold 3, driving assembly 802 is installed on the top of limiting plate 801, driving assembly 802 drives limiting plate 801 to slide, the outer wall of fixed mold 3 is fixedly connected with limiting frame 10, limiting plate 801 and connecting plate 9 are slidably connected in the inside of limiting frame 10, first driving cylinder 6 is fixedly installed on the inner wall of one side of injection molding machine body 1, connecting plate 9 is slidably connected in the inside of limiting frame 10 by starting first driving cylinder 6, and a plurality of ejector pins 5 are slidably connected in the inside of fixed mold 3, the workpiece on the surface of fixed mold 3 is ejected by ejector pin 5.

[0029] The output end of the first driving cylinder 6 is fixedly connected with the connecting plate 9 through the limiting frame 10, the limiting plate 801 is slidingly sleeved on the outer peripheral wall of the plurality of ejector pins 5, the driving assembly 802 comprises a fixed frame 8021, a rotary motor 8022, a transmission screw rod 8023 and a driving piece 8024, the fixed frame 8021 is fixedly installed on the top of the limiting frame 10, the rotary motor 8022 is fixedly installed on the outer wall of the fixed frame 8021, the output end of the rotary motor 8022 is fixedly connected with the transmission screw rod 8023, when the limiting plate 801 is attached to the inner wall of the limiting frame 10, the first driving cylinder 6 is in the open state, the connecting plate 9 is in the attached state with the limiting plate 801, the plurality of ejector pins 5 has the longest extension length, and specific reference can be made to the accompanying drawings. Figure 5 When the distance between the limiting plate 801 and the fixed mold 3 is greater, the extension length of the ejector pin 5 is shorter, the limiting plate 801 can accurately limit the extension length of the plurality of ejector pins 5, the movement length of the ejector pin can be accurately limited, so that the product is not damaged due to excessive ejection in the demolding process, the defects such as white and broken on the surface of the product can be avoided, and the appearance and size precision of the product are ensured.

[0030] The transmission screw rod 8023 is rotationally connected in the fixed frame 8021, the driving piece 8024 is slidingly sleeved on the outer peripheral wall of the transmission screw rod 8023, the driving piece 8024 is fixedly connected with the limiting plate 801, the injection molding assembly 2 comprises an injection molding box 201 and an injection molding pipe 202, the injection molding box 201 is installed on the top of the injection molding machine body 1, the injection molding pipe 202 is installed in the movable mold 4, and one end of the plurality of injection molding pipes 202 is connected with the inside of the injection molding box 201 through a connecting pipe, by starting the rotary motor 8022, the transmission screw rod 8023 is rotationally connected in the fixed frame 8021, and then the driving piece 8024 can drive the limiting plate 801 to be slidingly connected in the limiting frame 10, so as to shorten the distance between the limiting plate 801 and the connecting plate 9 and limit the position of the connecting plate 9.

[0031] The second driving cylinder 401 is fixedly connected to the inner wall of one side of the injection molding machine body 1, the output end of the second driving cylinder 401 is fixedly connected with the movable mold 4, the movable mold 4 is fixedly connected with a positioning block 402 on both sides of the bottom, and the positioning block 402 is slidingly connected to the inner top of the injection molding machine body 1, so as to accurately control the position and movement of the plurality of ejector pins 5, ensure that the product is evenly stressed in the demolding process, avoid product damage, deformation or poor demolding caused by inaccurate position of the ejector pin 5, and thus improve the qualified rate and quality stability of the product.

[0032] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An automatic positioning device for a limiting ejector pin injection molding machine, comprising an injection molding machine body (1), an injection molding assembly (2) disposed on the top of the injection molding machine body (1), a fixed mold (3) and a moving mold (4) respectively disposed on both sides inside the injection molding machine body (1), an ejector pin (5) disposed inside the fixed mold (3), and a first driving cylinder (6) disposed on one side of the ejector pin (5), characterized in that: The fixed mold (3) is provided with a positioning sensor (7) for positioning the position of the fixed mold (3), one end of the ejector pin (5) is in the same horizontal plane with the surface of the fixed mold (3), and the other end of the plurality of ejector pins (5) is fixedly connected with the connecting plate (9) penetrating through the fixed mold (3); The connecting plate (9) is provided with a limiting assembly (8) for limiting the sliding position of the connecting plate (9).

2. The automatic positioning device for the position-limiting ejector pin of an injection molding machine according to claim 1, characterized in that: The limiting assembly (8) is composed of a limiting plate (801) and a driving assembly (802), the limiting plate (801) is installed between the connecting plate (9) and the fixed mold (3), and the driving assembly (802) is installed on the top of the limiting plate (801), and the driving assembly (802) drives the limiting plate (801) to slide.

3. The automatic positioning device for the position-limiting ejector pin of an injection molding machine according to claim 2, characterized in that: The outer wall of the fixed mold (3) is fixedly connected with a limiting frame (10), the limiting plate (801) and the connecting plate (9) are slidingly connected inside the limiting frame (10), and the first driving cylinder (6) is fixedly installed on the inner wall of one side of the injection molding machine body (1).

4. The automatic positioning device for the position-limiting ejector pin of an injection molding machine according to claim 3, characterized in that: The output end of the first driving cylinder (6) is fixedly connected with the connecting plate (9) penetrating through the limiting frame (10), and the limiting plate (801) is slidingly sleeved on the outer peripheral wall of the plurality of ejector pins (5).

5. The automatic positioning device for the position-limiting ejector pin of an injection molding machine according to claim 2, characterized in that: The driving assembly (802) includes a fixed frame (8021), a rotary motor (8022), a transmission screw (8023) and a driving piece (8024), the fixed frame (8021) is fixedly installed on the top of the limiting frame (10), the rotary motor (8022) is fixedly installed on the outer wall of the fixed frame (8021), and the output end of the rotary motor (8022) is fixedly connected with the transmission screw (8023).

6. The automatic positioning device for a check pin injection molding machine of claim 5, wherein: The transmission screw (8023) is rotatably connected inside the fixed frame (8021), the driving piece (8024) is slidingly sleeved on the outer peripheral wall of the transmission screw (8023), and the driving piece (8024) is fixedly connected with the limiting plate (801).

7. The automatic positioning device for a check pin injection molding machine of claim 1, wherein: The injection molding assembly (2) comprises an injection molding box (201) and an injection molding pipe (202), the injection molding box (201) is installed on the top of the injection molding machine body (1), the injection molding pipe (202) is installed inside the movable mold (4), and one end of the plurality of injection molding pipes (202) is connected with the inside of the injection molding box (201) through a connecting pipe.

8. The automatic positioning device for a check pin injection molding machine of claim 7, wherein: One side of the injection molding machine body (1) is fixedly connected with a second driving cylinder (401), the output end of the second driving cylinder (401) is fixedly connected with the movable mold (4), the bottom of the movable mold (4) is fixedly connected with a positioning block (402), and the positioning block (402) is slidingly connected on the inner top of the injection molding machine body (1).

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