Mold locking mechanism of injection molding machine

Abstract

The utility model discloses an injection molding machine mold locking mechanism which comprises a table top, a T-shaped groove is formed in the middle position of the upper end face of the table top, a T-shaped block is arranged in the T-shaped groove in a sliding mode, a movable mold is fixedly arranged on the upper end face of the T-shaped block, a cavity is formed in the movable mold, and the T-shaped block is arranged in the cavity. Inner threaded cylinders are rotatably arranged on the inner wall of the cavity and located on the four corners, locking columns are arranged in the inner threaded cylinders and are in threaded connection with the inner threaded cylinders, first motors are fixedly arranged on the inner wall of the movable mold and located in the middle, and the first motors are in threaded connection with the inner threaded cylinders. Synchronous wheels are fixedly arranged at the output end of the first motor and the outer wall of the inner threaded cylinder, so that when the movable mold and the fixed mold are overlapped, the first motor can be controlled to enable the inner threaded cylinder to rotate, so that an inner threaded column of the inner threaded cylinder extends out and enters a locking hole, and at the moment, the threaded column is in threaded connection with the locking hole; the movable mold and the fixed mold are locked, and the mold locking effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold locking of injection molding machines, and more particularly to a mold locking mechanism of an injection molding machine. Background Art

[0002] An injection molding machine, also known as an injection molding machine or injection machine, is the primary molding equipment used to create various shapes of plastic products from thermoplastics or thermosetting plastics using plastic molding molds. The working principle of an injection molding machine is to inject plasticized, molten, or viscous, plastic into a closed mold cavity using the thrust of a screw or plunger. The final product is then solidified and shaped. The clamping mechanism is a crucial component of the injection molding machine, providing sufficient preload for the mold during molding to prevent mold separation caused by the high pressure of the molten plastic filling the mold cavity.

[0003] Most of the existing injection molding machine clamping mechanisms use a strong spring and a locking block on the moving mold to achieve the clamping effect. This locking method is not stable. The strong spring will lose its elasticity over time, resulting in a reduced locking effect and affecting normal use.

[0004] In addition, the clamping mechanism does not have a buffer structure, which results in a large impact force when the movable mold contacts the fixed mold. Over time, it will cause serious wear on the outer wall of the mold, thereby reducing the service life of the movable mold and the fixed mold, and even causing deformation and leakage. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the problems existing in the prior art, the utility model provides a locking mechanism for an injection molding machine to solve the problem that most of the existing locking mechanisms for injection molding machines mentioned in the background technology achieve the locking effect by setting a strong spring and a locking block on the movable mold. This locking method is not stable, and the strong spring will have a technical problem of low elasticity due to the passage of time.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a locking mechanism of an injection molding machine, comprising a desktop, an upper end surface of the desktop and a T-slot is provided in the middle position, a T-block is slidably provided inside the T-slot, a movable mold is fixedly provided on the upper end surface of the T-block, a cavity is provided inside the movable mold, an internal threaded cylinder is rotatably provided on the inner wall of the cavity and at four corners, a locking column is provided inside the internal threaded cylinder, and the locking column is threadedly connected to the internal threaded cylinder, a first motor is fixed on the inner wall of the movable mold and at the middle position, a synchronous wheel is fixed on the output end of the first motor and the outer wall of the internal threaded cylinder, a synchronous belt is provided between two of the synchronous wheels, and two sets of synchronous wheels and synchronous belts are provided on the outer walls of the three internal threaded cylinders, a fixed mold is provided on the upper end surface of the desktop and located on one side of the movable mold, locking holes are correspondingly provided on the outer wall of the fixed mold and at four corners, a buffer mechanism is provided on the outer wall of the fixed mold, and the buffer mechanism includes a buffer frame.

[0009] The utility model is further configured such that guide posts are fixedly provided on the inner wall of the buffer frame and at the four corners, guide holes are correspondingly opened on the four corners of the fixed mold, the guide posts are slidably installed with the guide holes, a buffer spring is fixedly provided at one end of the guide post, and the other end of the buffer spring is fixedly connected to the bottom of the guide hole, so as to facilitate buffering of the movable mold and the fixed mold.

[0010] The utility model is further configured such that a buffer groove is provided on the outer wall of the movable mold, and the buffer frame can enter the interior of the buffer groove, so as to facilitate a better fitting effect between the movable mold and the fixed mold when they are closed.

[0011] The utility model is further configured such that fixed blocks are provided on both sides of the fixed mold, positioning rods are fixed on the outer walls of the fixed blocks, connecting blocks are correspondingly provided on both sides of the movable mold, positioning cylinders are provided inside the connecting blocks, and the positioning rods and the positioning cylinders are slidably installed to facilitate guiding the movable mold.

[0012] The utility model is further configured such that a lubrication hole is opened on the upper end surface of the connecting block, the lubrication holes are connected to the positioning cylinder, screws are provided inside the lubrication holes, and the screws are threadedly connected to the lubrication holes to facilitate lubrication of the connection position between the positioning rod and the positioning cylinder.

[0013] The utility model is further configured such that a twisting block is fixedly provided on the upper end surface of the screw to facilitate disassembly of the screw.

[0014] The utility model is further configured such that an injection molding machine body is provided on the outer wall of the fixed mold.

[0015] The utility model is further configured such that a lead screw is provided for internal rotation of the T-slot, the lead screw is threadedly mounted on the T-block, and a second motor is provided at one end of the lead screw and located on the outer wall of the tabletop, so as to facilitate adjustment of the position of the movable mold so that it is closed with the fixed mold.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides a clamping mechanism for an injection molding machine, which has the following beneficial effects:

[0018] 1. By arranging an internal threaded barrel, a locking column and a synchronous belt at the door of the cavity, when the movable mold and the fixed mold overlap, the synchronous belt can be controlled to drive the multiple synchronous wheels and the internal threaded barrel to rotate, so that the internal threaded column thereof extends out and enters the locking hole. At this time, the threaded column will be threadedly connected with the locking hole to lock the movable mold and the fixed mold to achieve the mold locking effect. Compared with the locking structure of the spring and the locking block, this design is more stable and has a better locking effect, thereby preventing the problem of material leakage.

[0019] 2. By setting a buffer frame and a buffer spring, when the movable die contacts the fixed die, the buffer frame on the fixed die will enter the buffer groove, and the buffer spring will be compressed at the same time to buffer and offset the impact force on the fixed die, thereby protecting the inner walls of the fixed die and the movable die, reducing wear on the device and increasing its service life.

[0020] 3. By setting the positioning rod and positioning cylinder, the movable mold can be guided during the clamping process, making it more stable when moving. It can also enable the threaded column to accurately enter the locking hole during clamping to achieve the clamping effect. The user can also pour lubricating oil into the positioning cylinder through the lubrication hole to lubricate the connection between the positioning cylinder and the positioning rod to reduce wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall schematic diagram of an injection molding machine clamping mechanism when not in use;

[0022] Figure 2 This is the exploded view of the installation of T-block, movable mold, connecting block and screws;

[0023] Figure 3 Schematic diagram of the installation positions of the internal cavity of the movable mold, the internal threaded cylinder, the first motor, the synchronous wheel and the synchronous belt;

[0024] Figure 4 This is an exploded view of the installation of the buffer frame, guide column and buffer spring on the fixed mold;

[0025] Figure 5 for Figure 4A partial schematic diagram of area A in the middle.

[0026] In the figure: 1. Tabletop; 2. T-slot; 3. T-block; 4. Moving die; 5. Cavity; 6. Internally threaded barrel; 7. Locking post; 8. First motor; 9. Synchronous pulley; 10. Synchronous belt; 11. Fixed die; 12. Locking hole; 13. Buffer frame; 14. Guide post; 15. Guide hole; 16. Buffer spring; 17. Buffer slot; 18. Fixed block; 19. Positioning rod; 20. Connecting block; 21. Positioning barrel; 22. Lubrication hole; 23. Screw; 24. Twisting block; 25. Lead screw; 26. Second motor. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually relative to the directions shown in the drawings, or relative to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually relative to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned direction words are not used to limit the present invention.

[0030] See also Figure 1-5 , a locking mechanism for an injection molding machine, comprising a desktop 1, a T-slot 2 is provided on the upper end surface of the desktop 1 and in the middle position, a T-block 3 is slidingly provided inside the T-slot 2, a movable mold 4 is fixedly provided on the upper end surface of the T-block 3, a cavity 5 is provided inside the movable mold 4, an inner threaded cylinder 6 is rotatably provided on the inner wall of the cavity 5 and at four corners, a locking column 7 is provided inside the inner threaded cylinder 6, and the locking column 7 is threadedly connected to the inner threaded cylinder 6, a first motor 8 is fixed on the inner wall of the movable mold 4 and in the middle position, a synchronous wheel 9 is fixed on the output end of the first motor 8 and the outer wall of the inner threaded cylinder 6, a synchronous belt 10 is provided between the two synchronous wheels 9, and two sets of synchronous wheels 9 and synchronous belts 10 are provided on the outer walls of the three inner threaded cylinders 6, a fixed mold 11 is provided on the upper end surface of the desktop 1 and located on one side of the movable mold 4, locking holes 12 are provided on the outer wall of the fixed mold 11 and at four corners, a buffer mechanism is provided on the outer wall of the fixed mold 11, and the buffer mechanism includes a buffer frame 13.

[0031] In this embodiment, guide columns 14 are fixed on the inner wall of the buffer frame 13 and at the four corners. Guide holes 15 are correspondingly opened on the four corners of the fixed mold 11. The guide columns 14 are slidably installed with the guide holes 15. A buffer spring 16 is fixed at one end of the guide column 14, and the other end of the buffer spring 16 is fixedly connected to the bottom of the guide hole 15. A buffer groove 17 is opened on the outer wall of the movable mold 4, and the buffer frame 13 can enter the interior of the buffer groove 17.

[0032] More specifically, when the movable mold 4 overlaps with the fixed mold 11, the first motor 8 can be controlled to make the synchronous belt 10 drive the multiple synchronous wheels 9 and the internal threaded cylinder 6 to rotate, so that the internal threaded column thereof extends out and enters the locking hole 12. At this time, the threaded column will be threadedly connected with the locking hole 12 to lock the movable mold 4 and the fixed mold 11 to achieve the locking effect, and during the closing process, the buffer frame 13 will enter the buffer groove 17, and the buffer spring 16 will also be compressed to buffer and offset the impact force exerted on the fixed mold 11, thereby protecting the inner walls of the fixed mold 11 and the movable mold 4, reducing the wear of the device and increasing its service life.

[0033] See also Figure 1 、 Figure 2 and Figure 4 , as an implementation method for lubricating the connection position between the positioning cylinder 21 and the positioning rod 19: fixed blocks 18 are provided on both sides of the fixed mold 11, and positioning rods 19 are fixed on the outer walls of the fixed blocks 18. Connecting blocks 20 are correspondingly provided on both sides of the movable mold 4. Positioning cylinders 21 are provided inside the connecting blocks 20. The positioning rods 19 and the positioning cylinders 21 are slidably installed. Lubrication holes 22 are opened on the upper end surface of the connecting blocks 20. The lubrication holes 22 are communicated with the positioning cylinders 21. Screws 23 are provided inside the lubrication holes 22. The screws 23 are threadedly connected to the lubrication holes 22. The upper end surface of the screws 23 is fixed with a twisting block 24.

[0034] Specifically, the positioning rod 19 and the positioning cylinder 21 can guide the movable mold 4 during the mold locking process, making it more stable when moving, to ensure that the threaded column can accurately enter the locking hole 12 to achieve the mold locking effect, and the user can also remove the screw 23 by twisting the block 24 to pour lubricating oil into the positioning cylinder 21 through the lubrication hole 22 to lubricate the connection position between the positioning cylinder 21 and the positioning rod 19 to reduce wear.

[0035] Please refer to Figure 1 and Figure 3 As a further implementation method for moving the movable mold 4: an injection molding machine body is provided on the outer wall of the fixed mold 11, a screw 25 is provided for rotation inside the T-slot 2, the screw 25 is threadedly installed with the T-block 3, and a second motor 26 is provided at one end of the screw 25 and located on the outer wall of the desktop 1.

[0036] Specifically, the user can control the second motor 26 to enable the lead screw 25 to move the T-block 3 to adjust the position of the movable mold 4 .

[0037] To sum up, when the overall equipment is in use: the user can control the second motor 26 to make the screw 25 drive the T-block 3 to move so that the movable mold 4 and the fixed mold 11 are closed, and then control the first motor 8 to make the synchronous belt 10 drive multiple synchronous wheels 9 and the internal threaded cylinder 6 to rotate, so that the internal threaded column thereof extends out and enters the locking hole 12. At this time, the threaded column will be threadedly connected with the locking hole 12 to lock the movable mold 4 and the fixed mold 11 to achieve the locking effect, and in the closing process, the buffer frame 13 will enter the buffer groove 17, and the buffer spring 16 will also be compressed to buffer and offset the impact force exerted on the fixed mold 11, thereby protecting the inner walls of the fixed mold 11 and the movable mold 4, reducing the wear of the device and increasing its service life. The user can also remove the screw 23 by twisting the block 24 to pour lubricating oil into the positioning cylinder 21 through the lubrication hole 22 to lubricate the connection position between the positioning cylinder 21 and the positioning rod 19 to reduce wear.

[0038] In all the schemes mentioned above, the connection between the two components can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be listed here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A clamping mechanism for an injection molding machine, comprising a table (1), characterized in that: A T-shaped slot (2) is provided on the upper end surface of the tabletop (1) and in the middle thereof, a T-shaped block (3) is provided inside the T-shaped slot (2) for sliding, a movable die (4) is fixedly provided on the upper end surface of the T-shaped block (3), a cavity (5) is provided inside the movable die (4), an internal threaded barrel (6) is rotatably provided on the inner wall of the cavity (5) and at four corners thereof, a locking column (7) is provided inside the internal threaded barrel (6), and the locking column (7) is threadedly connected to the internal threaded barrel (6), a first motor (8) is fixedly provided on the inner wall of the movable die (4) and in the middle thereof, A synchronous wheel (9) is fixedly provided on the output end of the first motor (8) and the outer wall of the internal threaded cylinder (6), and a synchronous belt (10) is provided between the two synchronous wheels (9), wherein two sets of synchronous wheels (9) and synchronous belts (10) are provided on the outer walls of the three internal threaded cylinders (6), a fixed mold (11) is provided on the upper end surface of the table top (1) and located on one side of the movable mold (4), and locking holes (12) are correspondingly provided on the outer wall of the fixed mold (11) and located at four corners, and a buffer mechanism is provided on the outer wall of the fixed mold (11), and the buffer mechanism includes a buffer frame (13).

2. The mold clamping mechanism of an injection molding machine according to claim 1, characterized in that: Guide columns (14) are fixedly provided on the inner wall of the buffer frame (13) and at the four corners. Guide holes (15) are correspondingly opened at the four corners of the fixed mold (11). The guide columns (14) are slidably installed with the guide holes (15). A buffer spring (16) is fixedly provided at one end of the guide column (14), and the other end of the buffer spring (16) is fixedly connected to the bottom of the guide hole (15).

3. The mold clamping mechanism of an injection molding machine according to claim 2, wherein: A buffer groove (17) is provided on the outer wall of the movable mold (4), and the buffer frame (13) can enter the interior of the buffer groove (17).

4. The mold clamping mechanism of an injection molding machine according to claim 1, wherein: Both sides of the fixed mold (11) are provided with fixed blocks (18), and the outer walls of the fixed blocks (18) are fixedly provided with positioning rods (19). Both sides of the movable mold (4) are correspondingly provided with connecting blocks (20), and the interiors of the connecting blocks (20) are provided with positioning cylinders (21), and the positioning rods (19) and the positioning cylinders (21) are slidably installed.

5. The mold clamping mechanism of an injection molding machine according to claim 4, characterized in that: The upper end surface of the connecting block (20) is provided with a lubrication hole (22), and the lubrication holes (22) are communicated with the positioning cylinder (21). The interior of the lubrication hole (22) is provided with a screw (23), and the screw (23) is threadedly connected to the lubrication hole (22).

6. The mold clamping mechanism of an injection molding machine according to claim 5, characterized in that: The upper end surfaces of the screws (23) are all fixedly provided with a twisting block (24).

7. The mold clamping mechanism of an injection molding machine according to claim 2, characterized in that: An injection molding machine body is arranged on the outer wall of the fixed mold (11).

8. The mold clamping mechanism of an injection molding machine according to claim 1, characterized in that: A screw (25) is provided for rotation inside the T-slot (2), and the screw (25) is threadedly mounted on the T-block (3). A second motor (26) is provided at one end of the screw (25) and located on the outer wall of the desktop (1).

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