A mechanical safety structure for a mold clamping mechanism of an injection molding machine

Abstract

The present invention relates to the technical field of injection molding machine clamping mechanisms, and specifically to a mechanical safety structure for injection molding machine clamping mechanisms, comprising a bumper, one end of the bumper being fixed to a first connecting block connected to a thrust seat of the injection molding machine clamping mechanism, and the other end passing through a second connecting block connected to a fixed tail plate of the injection molding machine clamping mechanism, the thrust seat driving the bumper to move, the bumper being provided with a safety slot, the second connecting block being provided with a clamping block matching the safety slot on a side away from the first connecting block, one end of the clamping block being hinged to the second connecting block, and the other end of the clamping block being capable of being buckled into and out of the safety slot. The present invention has a reasonable design structure, a light and flexible structure, is easy to operate, has a good protection effect, and a coherent structure, making the mechanical safety mechanism safer and greatly reducing the occurrence of accidents.

Description

Technical Field

[0001] The invention relates to the technical field of a mold clamping mechanism of an injection molding machine, in particular to a mechanical safety structure used for the mold clamping mechanism of an injection molding machine. Background Art

[0002] Currently, injection molding machine clamping mechanisms are often equipped with mechanical safety mechanisms for safety reasons. When the safety door is open, the injection molding machine must be unable to perform the clamping action to achieve shutdown protection. This requires the addition of a mechanical safety mechanism to prevent any potential danger. Therefore, we continue to develop a safe and effective mechanical safety mechanism for the clamping mechanism of injection molding machines. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned technology and provide a mechanical safety structure for the mold clamping mechanism of an injection molding machine.

[0004] A mechanical safety structure for a mold clamping mechanism of an injection molding machine comprises a bumper, one end of the bumper being fixed to a first connecting block connected to a thrust seat of the mold clamping mechanism of the injection molding machine, and the other end passing through a second connecting block connected to a fixed tail plate of the mold clamping mechanism of the injection molding machine. The thrust seat drives the bumper to move, and a safety groove is provided on the bumper. A clamping block matching the safety groove is provided on the side of the second connecting block away from the first connecting block, one end of the clamping block is hinged to the second connecting block, and the other end of the clamping block can be buckled in the safety groove and detached from the safety groove.

[0005] Furthermore, one end of the card block is provided with a rotation control device for controlling the card block to rotate around the hinge point between the card block and the second connecting block, the control device includes a bracket and a limit block connected to the safety door of the mold clamping mechanism of the injection molding machine, the bracket is provided with a rotatable connecting shaft, one end of the connecting shaft is connected to a roller through a first connecting rod, the roller abuts against the limit block, the other end of the connecting shaft is connected to an intermediate hinge arm through a second connecting rod, one end of the intermediate hinge arm is hinged to the second connecting rod, and the other end of the intermediate hinge arm is hinged to an end of the card block away from the hinge point between the card block and the second connecting block;

[0006] The limiting block includes a horizontal limiting end and an inclined limiting end, and the roller can abut against the bottom side of the horizontal limiting end and the bottom side of the inclined limiting end.

[0007] Furthermore, the bracket includes two legs, and the top of each leg is connected to the connecting shaft through a bearing.

[0008] Furthermore, the first connecting rod is located outside the two legs, the axis of the first connecting rod is perpendicular to the axis of the connecting shaft, the second connecting rod is located between the two legs, the axis of the second connecting rod is parallel to the axis of the connecting shaft, and both ends of the second connecting rod are fixedly connected to the connecting shaft through a fixing rod.

[0009] Furthermore, one end of the intermediate articulated arm is hinged to the second connecting rod through a sliding sleeve, and the other end is provided with a connecting plate, and a first through hole is provided on the connecting plate. The clamping block is provided with two ear plates near one end of the intermediate articulated arm, and each ear plate is provided with a second through hole. The connecting plate of the intermediate articulated arm is inserted between the two ear plates and is hinged through a first hinge shaft. The other end of the clamping block is provided with a third through hole, and the third through hole is provided with a second hinge shaft for hingedly connecting the second connecting block and the clamping block.

[0010] Furthermore, the safety slot is inclined at a side close to the first connection block, and an end of the inclined side close to the first connection block is higher than an end away from the first connection block.

[0011] The advantages of the present invention are as follows: the present invention has a reasonable design structure, a light and flexible structure, easy operation and good protection effect; the structure is coherent, which makes the mechanical safety mechanism safer and greatly reduces the occurrence of accidents; the design of the card block rotation control device controls the engagement and disengagement of the card block and the safety slot by opening and closing the safety door of the injection molding machine, which is convenient and effective; the middle articulated arm and the second connecting rod are connected by a sliding sleeve, which can rotate around the axis of the second connecting rod and move along the axis of the second connecting rod, which is convenient for the injection molding machine to adjust the mold smoothly; the middle articulated arm and the second connecting rod are always connected together, and due to the length limitation of the second connecting rod, it can avoid the injection molding machine from adjusting the mold too much and causing the mechanical safety structure to fail to operate normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the combination of the mechanical safety structure of the present invention and the injection molding machine;

[0013] Figure 2 It is a structural schematic diagram of the present invention;

[0014] Figure 3 is a schematic diagram of the stent of the present invention;

[0015] Figure 4 It is a schematic diagram of a card block of the present invention;

[0016] Figure 5 is a schematic diagram of the intermediate articulated arm of the present invention;

[0017] Figure 6 This is a schematic diagram of the connection between the clamping block and the intermediate hinged arm of the present invention;

[0018] Figure 7 It is a schematic diagram of the limit block of the present invention.

[0019] As shown in the figure: 1. Bumper; 2. Block; 3. Bracket; 4. Limit block; 5. Connecting shaft; 6. First connecting rod; 7. Roller; 8. Second connecting rod; 9. Intermediate hinged arm; 10. Sleeve; 11. First hinged shaft; 12. Second hinged shaft; 13. Fixed rod; 20. Thrust seat; 21. First connecting block; 30. Fixed tail plate; 31. Second connecting block; 40. Safety door; 101. Safety slot; 201. Ear plate; 202. Second through hole; 203. Third through hole; 301. Support leg; 302. Bearing; 401. Horizontal limit end; 402. Inclined limit end; 901. Connecting plate; 902. First through hole. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below with reference to the accompanying drawings.

[0021] A mechanical safety structure for a mold clamping mechanism of an injection molding machine includes a bumper 1, one end of the bumper 1 is fixed to a first connecting block 21 connected to a thrust seat 20 of the mold clamping mechanism of the injection molding machine, and the other end passes through a second connecting block 31 connected to a fixed tail plate 30 of the mold clamping mechanism of the injection molding machine. The thrust seat 20 drives the bumper 1 to move, and a safety groove 101 is provided on the bumper 1. A clamping block 2 matching the safety groove 1 is provided on the side of the second connecting block 31 away from the first connecting block 21. One end of the clamping block 2 is hinged to the second connecting block 31, and the other end of the clamping block 2 can be buckled in the safety groove 101 and detached from the safety groove 1.

[0022] One end of the card block 2 is provided with a rotation control device for controlling the card block 2 to rotate around the hinge point between the card block 2 and the second connecting block 31. The control device includes a bracket 3 and a limit block 4 connected to the safety door 40 of the clamping mechanism of the injection molding machine. The bracket 3 is provided with a rotatable connecting shaft 5, one end of the connecting shaft 5 is connected to a roller 7 through a first connecting rod 6, and the roller 7 abuts against the limit block 4. The other end of the connecting shaft 5 is connected to an intermediate hinge arm 9 through a second connecting rod 8. One end of the intermediate hinge arm 9 is hinged to the second connecting rod 8, and the other end of the intermediate hinge arm 9 is hinged to one end of the card block 2 away from the hinge point between the card block 2 and the second connecting block 31;

[0023] The limiting block 4 includes a horizontal limiting end 401 and an inclined limiting end 402 , and the roller 7 can abut against the bottom side of the horizontal limiting end 401 and the bottom side of the inclined limiting end 402 .

[0024] The bracket 3 includes two legs 301 , and the top of each leg 301 is connected to the connecting shaft 5 via a bearing 302 .

[0025] The first connecting rod 6 is located outside the two legs 301, and the axis of the first connecting rod 6 is perpendicular to the axis of the connecting shaft 5. The second connecting rod 8 is located between the two legs 301, and the axis of the second connecting rod 8 is parallel to the axis of the connecting shaft 5. Both ends of the second connecting rod 8 are fixedly connected to the connecting shaft 5 through fixing rods 13.

[0026] One end of the intermediate articulated arm 9 is hinged to the second connecting rod 8 through a sliding sleeve 10, and the other end is provided with a connecting plate 901, and a first through hole 902 is provided on the connecting plate 901. The block 2 is provided with two ear plates 201 near one end of the intermediate articulated arm 9, and each ear plate 201 is provided with a second through hole 202. The connecting plate 901 of the intermediate articulated arm 9 is inserted between the two ear plates 201 and is hinged through the first hinge shaft 11. The other end of the block 2 is provided with a third through hole 203, and the third through hole 203 is provided with a second hinge shaft 12 for hingedly connecting the second connecting block 31 to the block 2.

[0027] The safety slot 101 is inclined at a side close to the first connection block 21 , and an end of the inclined side close to the first connection block 21 is higher than an end away from the first connection block 21 .

[0028] The present invention is specifically used as follows:

[0029] When the safety door 40 of the injection molding machine is closed, the roller 7 is separated from the limit block 4. At this time, the rotation control device of the clamping block 2 controls the clamping block 2 to separate from the safety groove 101, making it convenient for the bumper 1 to move under the drive of the thrust seat 20, thereby facilitating the opening and closing of the mold of the injection molding machine.

[0030] When the safety door 40 of the injection molding machine is opened, the limit block 4 connected to the safety door 40 moves with it, and the roller 7 first contacts the bottom side of the inclined limit end 402 of the limit block, and continuously moves toward the horizontal limit end 401. In the process from the inclined limit end 402 to the horizontal limit end 401, the connecting shaft 5 rotates under the limiting effect of the limit block 4 on the roller 7. The rotating connecting shaft 5 drives the second connecting rod 8 to rotate around the axis of the connecting shaft 5. The second connecting shaft 8 is connected to the intermediate hinge arm 9. The block 2 is pulled down until it is buckled in the safety groove 101, and the bumper is locked to play a safety role. When the block 2 needs to be opened, just close the safety door to make the roller 7 disengage from the limit block 4. In the process of the roller 7 disengaging from the limit block 4, since the second connecting rod 8 is arranged on one side of the connecting shaft 5, when the roller 7 is not restricted by the limit block 4, the second connecting rod 8 is reset under the action of the gravity on the side of the second connecting rod 8, thereby driving the limit block 4 to reset, that is, disengaging from the safety groove 101.

[0031] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A mechanical safety structure for a mold clamping mechanism of an injection molding machine, characterized in that: The invention comprises a bumper (1), wherein one end of the bumper (1) is fixed to a first connecting block (21) connected to a thrust seat (20) of a mold clamping mechanism of an injection molding machine, and the other end passes through a second connecting block (31) connected to a fixed tail plate (30) of the mold clamping mechanism of the injection molding machine, wherein the thrust seat (20) drives the bumper (1) to move, and a safety groove (101) is provided on the bumper (1), and a clamping block (2) matching the safety groove (101) is provided on the side of the second connecting block (31) away from the first connecting block (21), wherein one end of the clamping block (2) is hinged to the second connecting block (31), and the other end of the clamping block (2) can be buckled in the safety groove (101) and can be separated from the safety groove (101); A rotation control device for controlling the card block (2) to rotate around a hinge point between the card block (2) and the second connecting block (31) is provided at one end of the card block (2); the control device comprises a bracket (3) and a limit block (4) connected to a safety door (40) of a mold clamping mechanism of an injection molding machine; a rotatable connecting shaft (5) is provided on the bracket (3); one end of the connecting shaft (5) is connected to a roller (7) via a first connecting rod (6); the roller (7) abuts against the limit block (4); the other end of the connecting shaft (5) is connected to an intermediate hinge arm (9) via a second connecting rod (8); one end of the intermediate hinge arm (9) is hinged to the second connecting rod (8); the other end of the intermediate hinge arm (9) is hinged to an end of the card block (2) away from a hinge point between the card block (2) and the second connecting block (31); The limiting block (4) includes a horizontal limiting end (401) and an inclined limiting end (402), and the roller (7) can contact the bottom side of the horizontal limiting end (401) and the bottom side of the inclined limiting end (402); The bracket (3) includes two legs (301), and the top of each leg (301) is connected to the connecting shaft (5) via a bearing (302); One end of the intermediate hinged arm (9) is hinged to the second connecting rod (8) through a sliding sleeve (10), and the other end is provided with a connecting plate (901), and the connecting plate (901) is provided with a first through hole (902). The clamping block (2) is provided with two ear plates (201) near one end of the intermediate hinged arm (9), and each ear plate (201) is provided with a second through hole (202). The connecting plate (901) of the intermediate hinged arm (9) is inserted between the two ear plates (201) and is hinged through a first hinge shaft (11). The other end of the clamping block (2) is provided with a third through hole (203), and the third through hole (203) is provided with a second hinge shaft (12) for hingedly connecting the second connecting block (31) to the clamping block (2).

2. A mechanical safety structure for a mold clamping mechanism of an injection molding machine according to claim 1, characterized in that: The first connecting rod (6) is located outside the two supporting legs (301), and the axis of the first connecting rod (6) is perpendicular to the axis of the connecting shaft (5). The second connecting rod (8) is located between the two supporting legs (301), and the axis of the second connecting rod (8) is parallel to the axis of the connecting shaft (5). Both ends of the second connecting rod (8) are fixedly connected to the connecting shaft (5) through fixing rods (13).

3. The mechanical safety structure for the mold clamping mechanism of an injection molding machine according to claim 1, characterized in that: The safety slot (101) is inclined on a side close to the first connecting block (21), and an end of the inclined side close to the first connecting block (21) is higher than an end away from the first connecting block (21).

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