Mechanical safety device capable of being adjusted at will

Abstract

The utility model discloses a randomly adjustable mechanical safety device, which is positioned on one side of a mold locking component of an injection molding machine and is close to a safety door, the mold locking component comprises a mold locking plate II and a mold locking tail plate, the mechanical safety device comprises a locking baffle and a baffle rod, the locking baffle is fixed on the mold locking tail plate through a rotating shaft, and the baffle rod is fixed on the locking baffle through a screw. A safety rod is fixed to the second mold locking plate and penetrates through the mold locking tail plate, the baffle rod is lifted or put down by the safety connecting rod assembly, and when the baffle rod is put down, the safety rod is clamped by the lock baffle. The lock baffle and the baffle rod are of a detachable structure, the position of the baffle rod on the lock baffle can be adjusted, and therefore the baffle rod is kept abutting against the safety connecting rod assembly.

Description

Technical Field

[0001] The utility model belongs to the field of injection molding machines, and particularly relates to a mechanical safety device that can be adjusted arbitrarily. Background Art

[0002] An injection molding machine is a device that uses plastic molds to create various shapes of plastic products from thermoplastics or thermosetting materials. Each injection molding machine is equipped with a safety door. Once opened, the machine cannot close the mold, protecting the operator.

[0003] Chinese patent CN220280403U discloses a safety structure for the mold clamping mechanism of an injection molding machine. When the sliding door is closed, the baffle is raised to allow the screw to pass through and the two clamping plates can move smoothly. When the sliding door is opened, the baffle falls, the screw is stuck by the baffle, the safety rod cannot pass through, and the two clamping plates stop moving, preventing the injection molding machine from clamping.

[0004] In practice, due to processing and assembly errors, the connecting rod provided on the baffle may not be able to contact the first rocker arm, and the safety function cannot be achieved. Utility Model Content

[0005] The purpose of the utility model is to provide an adjustable mechanical safety device, which can adjust the angle of the baffle rod according to the actual installation situation so that the baffle rod can contact the safety link assembly to achieve the safety function.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The mechanical safety device, which can be adjusted at will, is located on one side of the clamping assembly of the injection molding machine and close to the safety door. The clamping assembly includes a clamping plate and a clamping tail plate. The mechanical safety device includes a lock baffle and a baffle rod. The lock baffle is fixed to the clamping tail plate through a rotating shaft. The baffle rod is screwed to the lock baffle. The clamping plate is fixed with a safety rod, which passes through the clamping tail plate. The baffle rod is lifted or lowered by the safety link assembly. When the baffle rod is lowered, the lock baffle clamps the safety rod.

[0008] The baffle rod is fixed to the lock baffle by screws, which makes it easy to adjust the installation angle of the baffle rod on the lock baffle, so that the baffle rod can be pressed against the safety link assembly according to the actual installation situation.

[0009] Furthermore, the baffle rod includes a fixing portion and a rod portion, the fixing portion is provided with an arc-shaped waist hole and a round hole, the lock baffle is provided with a mounting hole, and the arc-shaped waist hole and the round hole correspond to the mounting hole.

[0010] During installation, pass the screw through the arc-shaped waist hole and the round hole and screw it into the corresponding mounting hole. Rotate with the round hole as the axis, and the fixed part rotates along the arc-shaped waist hole until the rod rests against the safety link assembly. Then tighten the screw to achieve the effect of arbitrary adjustment.

[0011] Furthermore, a limit block is provided on the side of the clamping tail plate, the limit block is provided with a through hole, the safety rod passes through the through hole, and the locking baffle is fixed to the limit block.

[0012] The limit block is used to limit the movement of the safety rod and is also used to fix the position of the lock baffle so that the lock baffle can quickly clamp the safety rod.

[0013] Furthermore, the safety rod is provided with evenly distributed protrusions, and horizontal portions are formed between the protrusions, and the locking plate clamps the horizontal portions.

[0014] When the locking baffle is stuck on the horizontal part, the locking baffle abuts against the raised part, so the safety bar cannot move along the mold closing direction, thereby making it impossible for the two clamping plates to close the mold.

[0015] Furthermore, the locking baffle is an L-shaped structure, and a circular chamfer is provided on the side of the locking baffle at the corner close to the second clamping plate, and the circular chamfer matches the raised portion.

[0016] The L-shaped locking plate engages the safety bar at its corner. Since the locking plate is engaged in the horizontal portion between the protrusions, to reduce friction, the side of the locking plate's corner that contacts the protrusions is chamfered. This allows the locking plate to rotate downwards and engage the safety bar more smoothly, thus increasing the life of the safety bar.

[0017] Furthermore, the raised portion includes a truncated cone portion with a gradually increasing radius and an annular portion with a constant radius.

[0018] When the lock baffle rotates downward and contacts the truncated cone or the circular ring, the lock baffle cannot immediately lock the safety bar. When the safety bar continues to move and the lock baffle contacts the horizontal part, the lock baffle locks the safety bar. Therefore, the setting of the truncated cone plays a certain buffering role for the lock baffle.

[0019] Furthermore, the safety link assembly includes a shaft and a rocker, a bearing is provided on one side of the shaft, and a rocker is provided on the other side of the shaft, and the rocker is abutted against the baffle rod.

[0020] When the safety door is closed, the bearing is pressed by the safety door pressure plate, the rocker rotates clockwise to lift the baffle rod, and then lifts the lock baffle, and the safety bar can move back and forth.

[0021] When the safety door is opened, the weight of the rocker is greater than the weight of the bearing, the rocker rotates counterclockwise, the baffle rod and the lock baffle rotate clockwise around the rotating shaft under the action of gravity, and the lock baffle clamps the safety rod.

[0022] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0023] 1. The lock baffle and baffle rod are detachable structures, and the position of the baffle rod on the lock baffle can be adjusted to keep the baffle rod against the safety link assembly.

[0024] 2. The lock baffle is provided with an arc-shaped waist hole and a round hole. Pass the screw through the arc-shaped waist hole and the round hole and screw it into the corresponding mounting hole. Rotate with the round hole as the axis. The fixed part rotates along the arc-shaped waist hole until the rod rests against the safety link assembly. Then tighten the screw to achieve the effect of arbitrary adjustment.

[0025] 3. The L-shaped locking plate engages the safety bar at its corner. Since the locking plate is located in the horizontal portion between the raised portions, to reduce friction, the side of the locking plate where the corner meets the raised portion is chamfered. This allows the locking plate to rotate downwards and engage the safety bar more smoothly, thus increasing the life of the safety bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 This is a structural diagram of an injection molding machine.

[0028] Figure 2 It is a structural diagram of a mechanical safety device that can be adjusted arbitrarily.

[0029] Figure 3 Schematic diagram of the structure of the baffle rod.

[0030] Figure 4 It is a structural diagram of the lock baffle.

[0031] Figure 5 It is a structural diagram of the safety bar. DETAILED DESCRIPTION

[0032] like Figure 1 The injection molding machine shown in the figure is provided with a second clamping plate 1 and a clamping tail plate 2. A limit block 3 is provided on the side of the clamping tail plate 2. The limit block 3 is provided with a through hole (not shown in the figure). A safety rod 4 passes through the through hole. The limit block 3 is equipped with a mechanical safety device. The second clamping plate 1 is fixed with a safety rod 4.

[0033] like Figure 1 As shown, the safety link assembly includes a shaft 8 and a rocker 9. A bearing 10 is provided on one side of the shaft 8, and a rocker 9 is provided on the other side of the shaft 8. The rocker 9 is against the baffle rod 6. A safety door pressure plate 12 is fixed to the back of the safety door 11.

[0034] like Figure 2 As shown, the mechanical safety device includes a lock baffle 5 and a baffle rod 6. The lock baffle 5 is fixed to the limit block 3 through a rotating shaft 7, and the baffle rod 6 is fixed to the lock baffle 5 by a screw 13.

[0035] like Figure 2 and Figure 3As shown, the baffle rod 6 includes a fixing portion 61 and a rod portion 62. The fixing portion 61 is provided with an arc-shaped waist hole 63 and a round hole 64. The lock baffle 5 is provided with a mounting hole (not shown in the figure). The arc-shaped waist hole 63 and the round hole 64 correspond to the mounting hole.

[0036] During installation, the screw 13 is passed through the arc-shaped waist hole 63 and the circular hole 64 and screwed into the corresponding mounting hole. The circular hole 64 is rotated as the axis, and the fixing part 61 rotates along the arc-shaped waist hole 63 until the rod 62 is against the rocker 9, and then the screw 13 is tightened to achieve the effect of arbitrary adjustment.

[0037] like Figure 4 As shown, the locking plate 5 is an L-shaped structure, and a circular chamfer 51 is provided at the corner of the locking plate 5 near the second clamping plate 1. The circular chamfer 51 matches the raised portion. The raised portion includes a frustum portion 41 with a gradually increasing radius and a circular ring portion 42 with a constant radius.

[0038] like Figure 5 As shown, the safety lever 4 is provided with evenly distributed protrusions, and a horizontal portion 43 is formed between the protrusions, and the locking plate 5 clamps the horizontal portion 43 .

[0039] When the locking plate 5 is stuck to the horizontal portion, the locking plate 5 abuts against the raised portion, so that the safety bar 4 cannot move along the mold closing direction, thereby making it impossible for the second clamping plate 1 to close the mold.

[0040] The L-shaped locking plate 5 is clamped to the safety bar 4 at the corner. Since the locking plate 5 is clamped to the horizontal portion 43 between the protrusions, in order to reduce friction, the side of the locking plate 5 that is in contact with the protrusion is set as an arc chamfer 51, so that the locking plate 5 can be rotated downward to clamp the safety bar 4 more smoothly, thereby improving the life of the safety bar 4.

[0041] When the safety door 11 is closed, the bearing 10 is pressed by the safety door pressure plate 12, and the rocker 9 rotates clockwise to lift the baffle rod 6, thereby lifting the lock baffle 5, and the safety rod 4 can move forward and backward.

[0042] When the safety door 11 is opened, the weight of the rocker 9 is greater than the weight of the bearing 10, the rocker 9 rotates counterclockwise, the baffle rod 6 and the lock baffle 5 rotate clockwise around the rotating shaft 7 under the action of gravity, and the lock baffle 5 clamps the safety rod 4.

[0043] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications based on the present invention that solve essentially the same technical problems and achieve essentially the same technical effects are included within the scope of protection of the present invention.

Claims

1. An adjustable mechanical safety device is located on one side of the mold clamping assembly of the injection molding machine and close to the safety door. The mold clamping assembly includes a second mold clamping plate and a mold clamping tail plate, and is characterized by: It includes a locking baffle and a baffle rod. The locking baffle is fixed to the clamping tail plate through a rotating shaft. The baffle rod is screwed to the locking baffle. The second clamping plate is fixed with a safety rod. The safety rod passes through the clamping tail plate. The baffle rod is lifted or lowered by the safety link assembly. When the baffle rod is lowered, the locking baffle clamps the safety rod.

2. The adjustable mechanical safety device according to claim 1, characterized in that: The baffle rod includes a fixing portion and a rod portion, the fixing portion is provided with an arc-shaped waist hole and a round hole, the lock baffle is provided with a mounting hole, the arc-shaped waist hole and the round hole correspond to the mounting hole.

3. The adjustable mechanical safety device according to claim 1, characterized in that: A limit block is provided on the side of the clamping tail plate, the limit block is provided with a through hole, the safety rod passes through the through hole, and the lock baffle is fixed to the limit block.

4. The adjustable mechanical safety device according to claim 1, characterized in that: The safety rod is provided with evenly distributed protrusions, and horizontal portions are formed between the protrusions. The locking baffle clamps the horizontal portions.

5. The adjustable mechanical safety device according to claim 4, characterized in that: The locking baffle is an L-shaped structure, and a circular chamfer is provided on a side of the locking baffle at a corner close to the second mold locking plate, and the circular chamfer matches the protrusion.

6. The adjustable mechanical safety device according to claim 5, characterized in that: The raised portion includes a frustum portion with a gradually increasing radius and a circular ring portion with a constant radius.

7. The adjustable mechanical safety device according to claim 1, characterized in that: The safety link assembly includes a shaft and a rocker. A bearing is provided on one side of the shaft, and the rocker is provided on the other side of the shaft. The rocker abuts against the baffle rod.

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