Mould locking mechanism for injection molding machine

Abstract

The utility model discloses a mould locking mechanism for an injection molding machine, which comprises a head plate, a second plate, a tail plate, a machine frame and four guide pillars, the head plate and the second plate are arranged oppositely and are respectively and fixedly provided with a fixed mould plate and a movable mould plate, two ends of each guide pillar are respectively and fixedly connected with the head plate and the machine frame, the second plate is provided with a sliding hole in a penetrating manner, and the sliding hole is matched with the guide pillar in a sliding manner. The tail plate is arranged on the side, away from the head plate, of the second plate, an oil cylinder is fixedly installed on the tail plate, a cylinder rod of the oil cylinder penetrates through the tail plate and is connected with the second plate through a machine hinge assembly, and a penetrating hole in sliding fit with the guide column is formed in the tail plate in a penetrating mode. Main mold adjusting structures are arranged between the two opposite sides of the tail plate and the machine frame respectively, and auxiliary mold adjusting structures are further arranged between the two opposite sides of the tail plate and the machine frame. The mold locking mechanism for the injection molding machine has the advantages of capability of improving stable supporting force, simple structure and long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a mold locking mechanism for injection molding machines. Background Art

[0002] Injection molding utilizes the thermophysical properties of plastics to plasticize, melt, and homogenize the material before injecting it into the mold cavity. The molten material is then pressure-maintained, cooled, and solidified in the mold cavity to form the finished product. Injection molding requires an injection molding machine.

[0003] The clamping unit of the injection molding machine currently in use includes a head plate, a second plate, a tail plate and a Green column. The head plate and the second plate are opposite to and fixedly installed with a fixed plate and a movable plate respectively. The second plate can slide on the Green column, and the position of the second plate is locked by the oil cylinder and the machine hinge assembly to achieve mold locking. The oil cylinder is installed on the tail plate. According to the different thicknesses of the movable mold and the fixed mold, the position of the tail plate and the second plate needs to be adjusted, and the position is adjusted by the set mold adjustment mechanism. However, the existing mold adjustment mechanism drives the reduction gearbox to adjust the tail plate relative to the Green column through a motor. The Green column is provided with a trapezoidal screw thread, and self-locking is achieved by the trapezoidal screw thread. After long-term use, the screw thread will wear out, affecting the locking effect, and when it needs to be repaired or replaced, the mold adjustment mechanism needs to be disassembled and assembled, which is time-consuming and labor-intensive. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by this patent application is how to provide a clamping mechanism for an injection molding machine that can improve stable supporting force, has a simple structure and a long service life.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A locking mechanism for an injection molding machine comprises a head plate, a second plate, a tail plate, a frame and four guide posts, the head plate and the second plate being arranged opposite to each other and fixedly mounted with a fixed platen and a movable platen, the two ends of the guide posts being fixedly connected to the head plate and the frame respectively, the two plates being penetrated by sliding holes which slide with the guide posts, the tail plate being arranged on a side of the second plate away from the head plate, an oil cylinder being fixedly mounted on the tail plate, the cylinder rod of the oil cylinder passing through the tail plate and being connected to the second plate by a machine hinge assembly, and being characterized in that the tail plate is penetrated by through holes which slide with the guide posts; main mold adjustment structures are respectively arranged between the opposite sides of the tail plate and the frame, and auxiliary mold adjustment structures are also arranged between the opposite sides of the tail plate and the frame.

[0007] In this way, the head plate, second plate, tail plate, frame and four guide pillars are all the main structures of the existing injection molding machine. The oil cylinder and hinge structure are existing structures and can be used directly. The oil cylinder drives the hinge assembly to adjust the position of the second plate, so that the second plate drives the movable plate and the fixed plate to close or separate the mold. In this application, the main mold adjustment structure and the auxiliary mold adjustment structure replace the previous coordination of the reduction box and the Green column, making the mechanism exposed, convenient for maintenance, saving time and effort. The position of the tail plate is adjusted by the main mold adjustment structure, and then the auxiliary mold adjustment structure is used to fix the position of the tail plate, thereby improving the position accuracy and reliability of the tail plate.

[0008] The frame is U-shaped, and both ends of the opening of the frame are fixedly connected to the head plate respectively.

[0009] Among them, the main mold adjustment structure includes a main screw, the frame is fixed with a vertical plate, one end of the main screw is connected to the vertical plate through a bearing, the other end of the main screw passes through the frame and is fixedly connected to the output shaft of the main clamping motor, the main screw is connected to the frame through a bearing, and a main nut block is fixedly installed on the tail plate through a connecting block, and the main nut block is connected to the main screw through a thread.

[0010] Wherein, the auxiliary mold adjustment structure includes two auxiliary mold adjustment components symmetrically arranged on both sides of the main mold adjustment structure.

[0011] Among them, the auxiliary mold adjustment assembly includes an auxiliary screw, one end of the auxiliary screw is connected to the vertical plate through a bearing, the other end of the auxiliary screw passes through the frame and is fixedly connected to the output shaft of the auxiliary clamping motor, the auxiliary screw is connected to the frame through a bearing, an auxiliary nut block is threadedly connected to the auxiliary screw, the lower end of the auxiliary nut block is fixed with an abutment block, the upper end of the abutment block is slidably fitted with the frame, and the tail plate is fixedly installed with a stopper facing the abutment block.

[0012] The abutment block has a lower inclined surface, and the stopper has an upper inclined surface capable of fitting with the lower inclined surface.

[0013] In summary, the clamping mechanism for the injection molding machine has the advantages of being able to improve stable supporting force, having a simple structure and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a structural schematic diagram of a clamping mechanism for an injection molding machine.

[0015] Figure 2 for Figure 1 A schematic diagram showing another orientation after removing part of the rack.

[0016] Figure 3 It is a schematic diagram of part of the frame and the main mold adjustment structure and auxiliary mold adjustment structure. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to the accompanying drawings. In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional terms such as "upper, lower" and "top, bottom" are generally based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. Unless otherwise indicated, these directional terms do not indicate or imply that the devices or components referred to must have a specific direction or be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention; the directional terms "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0018] like Figure 1-3 As shown, a locking mechanism for an injection molding machine includes a head plate 1, a second plate 2, a tail plate 3, a frame 4 and four guide pillars 5. The head plate and the second plate are arranged opposite to each other and are respectively fixedly installed with a fixed template 6 and a movable template 7. The two ends of the guide pillars are respectively fixedly connected to the head plate and the frame. The two plates are penetrated by sliding holes that slide with the guide pillars. The tail plate is arranged on the side of the second plate away from the head plate. A cylinder 8 is fixedly installed on the tail plate. The cylinder rod of the cylinder passes through the tail plate and is connected to the second plate through a machine hinge assembly 9. The tail plate is penetrated by through holes that slide with the guide pillars. Main mold adjustment structures are respectively arranged between the opposite sides of the tail plate and the frame, and auxiliary mold adjustment structures are also arranged between the opposite sides of the tail plate and the frame.

[0019] In this way, the head plate, second plate, tail plate, frame and four guide pillars are all the main structures of the existing injection molding machine. The oil cylinder and hinge structure are existing structures and can be used directly. The oil cylinder drives the hinge assembly to adjust the position of the second plate, so that the second plate drives the movable plate and the fixed plate to close or separate the mold. In this application, the main mold adjustment structure and the auxiliary mold adjustment structure replace the previous coordination of the reduction box and the Green column, making the mechanism exposed, convenient for maintenance, saving time and effort. The position of the tail plate is adjusted by the main mold adjustment structure, and then the auxiliary mold adjustment structure is used to fix the position of the tail plate, thereby improving the position accuracy and reliability of the tail plate.

[0020] During implementation, the frame is U-shaped, and both ends of the opening of the frame are fixedly connected to the head plate, thereby improving the integrity and playing a stabilizing role.

[0021] During implementation, the main mold adjustment structure includes a main screw 10. A vertical plate 11 is fixed to the frame. One end of the main screw is connected to the vertical plate via a bearing. The other end of the main screw passes through the frame and is fixedly connected to the output shaft of the main mold clamping motor 12. The main screw and frame are connected via a bearing. A main nut block 14 is fixedly mounted on the tail plate via a connecting block 13. The main nut block and the main screw are connected by threads. The main mold clamping motor drives the main screw to rotate, and the cooperation between the main screw and the main nut block drives the connecting block and the tail plate to move.

[0022] During implementation, the auxiliary mold adjustment structure includes two auxiliary mold adjustment components symmetrically arranged on both sides of the main mold adjustment structure. The arrangement of four auxiliary mold adjustment components improves stability.

[0023] During implementation, the auxiliary mold adjustment assembly includes an auxiliary screw 15, one end of which is connected to the vertical plate via a bearing, and the other end of which passes through the frame and is fixedly connected to the output shaft of the auxiliary mold clamping motor 16. The auxiliary screw is connected to the frame via a bearing, and an auxiliary nut block 17 is threadedly connected to the auxiliary screw. An abutment block 18 is fixed to the lower end of the auxiliary nut block, and a stopper 19 is fixedly installed on the tail plate opposite the abutment block. The auxiliary mold clamping motor drives the auxiliary screw to rotate, and the cooperation between the auxiliary screw and the auxiliary nut block drives the abutment block to move. The upper end of the abutment block slides and fits with the frame to prevent the abutment block from rotating. The abutment block moves until it abuts against the stopper, and the position of the tail plate is limited by limiting the stopper.

[0024] During implementation, the abutment block has a lower inclined surface, and the stop block has an upper inclined surface that can fit with the lower inclined surface, thereby increasing the contact area and further improving the stability of the positional definition of the tail plate.

[0025] Specifically, when adjusting the position of the tail plate, the main screw is first driven by the main clamping motor to rotate into position, and then the auxiliary clamping motor drives the auxiliary screw to rotate until the abutment block abuts against the stop block, thereby stabilizing the position of the tail plate.

[0026] Finally, it should be noted that those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A clamping mechanism for an injection molding machine, comprising a head plate, a second plate, a tail plate, a frame, and four guide posts, wherein the head plate and the second plate are arranged opposite each other and are respectively fixedly mounted with a fixed platen and a movable platen, the two ends of the guide posts are respectively fixedly connected to the head plate and the frame, the two plates are penetrated by a sliding hole that slides with the guide posts, the tail plate is arranged on a side of the second plate away from the head plate, an oil cylinder is fixedly mounted on the tail plate, the cylinder rod of the oil cylinder passes through the tail plate and is connected to the second plate through a hinge assembly, and is characterized in that: The tail plate is penetrated by a through hole for slidingly cooperating with the guide column; main mold adjustment structures are respectively provided between the two opposite sides of the tail plate and the frame, and auxiliary mold adjustment structures are also provided between the two opposite sides of the tail plate and the frame.

2. A clamping mechanism for an injection molding machine according to claim 1, characterized in that: The frame is U-shaped, and both ends of the opening of the frame are fixedly connected to the head plate respectively.

3. A clamping mechanism for an injection molding machine according to claim 2, characterized in that: The main mold adjustment structure includes a main screw, a vertical plate is fixed to the frame, one end of the main screw is connected to the vertical plate through a bearing, the other end of the main screw passes through the frame and is fixedly connected to the output shaft of the main clamping motor, the main screw is connected to the frame through a bearing, and a main nut block is fixedly installed on the tail plate through a connecting block, and the main nut block is connected to the main screw through a thread.

4. A clamping mechanism for an injection molding machine according to claim 3, characterized in that: The auxiliary mold adjustment structure includes two auxiliary mold adjustment components symmetrically arranged on both sides of the main mold adjustment structure.

5. The mold clamping mechanism for an injection molding machine according to claim 4, characterized in that: The auxiliary mold adjustment assembly includes an auxiliary screw, one end of the auxiliary screw is connected to the vertical plate through a bearing, the other end of the auxiliary screw passes through the frame and is fixedly connected to the output shaft of the auxiliary clamping motor, the auxiliary screw is connected to the frame through a bearing, an auxiliary nut block is threadedly connected to the auxiliary screw, the lower end of the auxiliary nut block is fixed with an abutment block, the upper end of the abutment block is slidably fitted with the frame, and the tail plate is fixedly installed with a stopper facing the abutment block.

6. The mold clamping mechanism for an injection molding machine according to claim 5, characterized in that: The abutment block has a lower inclined surface, and the stopper has an upper inclined surface capable of fitting with the lower inclined surface.

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