CN109203384B - A lever side core pulling mechanism - Google Patents

Abstract

The invention discloses a lever-side core-pulling mechanism, which comprises a movable template, a lever with a circular arc chute at the left end, a fixed template and a stationary bottom plate for fixing the fixed template. The movable template can move toward or away from the fixed template. The lever is rotated and fixed on the lever fulcrum on the top of the moving formwork. The arc chute at the left end of the lever is provided with a side core, one end of the side core is slidably installed in the arc chute, and the other end of the side core is driven by the template. The top side core hole protrudes into the cavity inside the movable platen as a core. The invention realizes the formation of small holes on the side of the plastic parts by the side core, and the circular arc chute on the lever guides and drives the side core to move up and down in the pin hole, thereby realizing side core pulling or reset. The lever-side core-pulling mechanism of the invention has a simple overall structure and convenient operation, can quickly complete the side-pulling mechanism and avoid damage to plastic parts.

Description

A lever side core pulling mechanism

technical field

The invention belongs to the field of polymer material forming and processing, and relates to a lever side core pulling mechanism.

Background technique

The commonly used side core-pulling mechanisms are oblique pins, slider mechanisms, or inclined sliders or rack and pinion mechanisms or hydraulic core-pulling mechanisms. Some of these mechanisms are more complicated, such as inclined pins and slider mechanisms, and some have higher costs, such as hydraulic core pulling. Hydraulic core pulling can achieve longer distance side core pulling. For the short-distance side core-pulling mechanism, the present application proposes a lever-side core-pulling mechanism, which has a simple structure, a flexible mechanism and high side-pulling efficiency.

SUMMARY OF THE INVENTION

In order to overcome the technical problems of complex structure and high cost of the side core-pulling mechanism in the prior art, the present invention provides a low-cost lever side core-pulling mechanism with simple structure, flexible mechanism and high side-pulling efficiency.

In order to achieve the above object, the technical scheme adopted in the present invention is:

The utility model relates to a lever side core-pulling mechanism, comprising a movable template, a lever provided with a circular arc chute at the left end of the side core, a fixed template and a fixed mold base plate for fixing the fixed template. The movable template can move left and right relative to the fixed template.

The top of the movable template is sequentially provided with vertical side core holes, lever fulcrums and grooves with springs inside from left to right, and a cavity is arranged in the movable template. The opening of the side core hole is upward and the bottom is connected with the cavity. One end of the spring is fixedly connected to the bottom of the groove, and the other end of the spring is fixedly connected to the lever. When the movable platen and the fixed platen are completely closed, the spring has a downward pressure on the lever. pull.

The lever is arc-shaped and the arc-shaped opening is upward. The lever is hinged with the lever fulcrum. One end of the side core is slidably installed in the arc chute, and the other end of the side core protrudes from the side core hole and enters the cavity as a side type. Core, clearance fit between the side core and the side core hole. The radius of the arc chute is equal to the distance between the lever fulcrum and the upper left end of the arc chute. As the lever is turned over, the side core can slide along the arc chute, and the side core can move upward or downward in the side core hole. Downward linear movement to achieve side core pulling or reset.

The top of the fixed platen is fixedly installed with bumps, and the top of the bumps rolls and installs the rollers. When the movable platen and the fixed platen start to be parted enough to be demolded, the rollers are always in contact with the lever and exert downward pressure on the lever.

After the side core pulling is completed, in order to prevent the side core from deviates from the side core hole with the arc chute continuing to slide, further, after the side core pulling is completed, the lower end of the side core completely leaves the cavity, and the upper end of the side core is just in the circle. The lower right end of the arc chute.

Further, the top of the movable template is provided with a second groove, the side core hole is located at the bottom of the second groove and communicates with the cavity, a core sleeve is placed in the second groove, and a vertical direction is arranged in the core sleeve. The through hole is coaxial with the side core hole and the size is corresponding, and the bottom of the side core is inserted from the through hole and extends into the side core hole, and then enters the cavity. The transition fit between the core sleeve and the second groove, the clearance fit between the through hole on the core sleeve, the side core hole in the second groove and the side core, the core sleeve is opposite to the side core hole on the one hand. It has a guiding function, on the other hand, it avoids material leakage. At the same time, the core sleeve has a protective effect on the moving template, and the core sleeve can be replaced when worn.

Further, when the movable platen and the fixed platen are parted enough to be released from the mold, the spring is in a compressed state. The spring in the compressed state exerts upward elastic force on the right part of the lever, and combined with the action of the roller, it is convenient for the moving platen to reset, making the mold clamping more convenient and labor-saving.

Further optimized, when the movable platen (1) and the fixed platen (8) are completely closed, the roller (7) has a downward force on the lever (1). The spring 6 and the roller 7 act together on the lever 5, so that the lever 5 is more stable during the molding process.

The beneficial effects obtained by the present invention are: 1) When the movable platen and the fixed platen are completely closed, the spring has a downward pulling force on the lever, so that the side core does not move up and down in the side core hole at will. 2) The present invention relies on the side core to form small holes on the side of the plastic part, and realizes the overturning of the lever installed on the moving platen through the collision of the roller installed on the fixed platen, and the arc chute on the lever guides the lever at the same time as the overturning of the lever. And drive the side core to move up and down in the pin hole, and when the side core moves upwards, the side core pulling is realized. The overall structure is simple and the operation is convenient, which can quickly complete the side core pulling and avoid damage to the plastic parts.

Description of drawings

1 is a schematic diagram of a lever-side core-pulling mechanism in an embodiment of the present invention

In the picture: 1. Moving template, 2. Plastic parts, 3. Side core, 4. Arc chute, 5. Lever, 6. Spring, 7. Roller, 8. Fixed template, 9. Fixed mold base.

Detailed ways

The present invention is described in further detail below in conjunction with embodiment:

The present invention will now be described in further detail with reference to the accompanying drawings. The accompanying drawings are simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, and thus only show the structures related to the present invention.

Referring to Figure 1, a lever-side core-pulling mechanism includes a movable die plate 1, a lever 5 with a circular arc chute on the left end, a fixed die plate 8, and a fixed die bottom plate 9 for fixing the fixed die plate. The fixed die plate 8 passes through the fixed die bottom plate. 9 Fixed installation, the movable template 1 can move toward or away from the fixed template 8.

The top of the movable platen 1 is sequentially provided with a vertical side core hole, a lever fulcrum and a groove with an upward opening from left to right. The side core hole opens upward and the bottom is connected to the cavity. A spring 6 is arranged in the groove. One end of the spring 6 is fixedly connected to the bottom of the groove, and the other end of the spring 6 extends out of the groove and is fixedly connected to the lever 5. When the die plate 1 and the fixed die plate 8 are completely closed, the spring 6 has a downward pulling force on the lever 5 .

The lever 5 is arc-shaped and the arc-shaped opening is upward. The lever 5 is rotated and fixed on the lever fulcrum, and the lever can be turned clockwise or counterclockwise around the lever fulcrum on a vertical plane. The arc chute at the left end of the lever is provided with a side core 3, one end of the side core 3 is slidably installed in the arc chute through a pin, and the other end of the side core 3 protrudes from the side core hole and enters the cavity for use. As a side core, there is a clearance fit between the side core and the side core hole. More specifically, the top of the movable template 1 is provided with a second groove, the side core hole is located at the bottom of the second groove and communicates with the cavity, a core sleeve is placed in the second groove, and the core sleeve is provided with A vertical through hole, the through hole is coaxial with the side core hole and the size is corresponding, and the bottom of the side core is inserted from the through hole and extends into the side core hole, and then enters the cavity. There is transition fit between the core sleeve and the second groove, and clearance fit between the through hole on the core sleeve, the side core hole in the second groove and the side core 3 .

The radius of the arc chute is equal to the distance between the lever fulcrum and the upper left end of the arc chute. As the lever 5 is turned over, the side core 3 can slide along the arc chute, while the side core 3 is in the side core. The vertical upward or vertical downward linear movement is performed in the hole, thereby realizing side core pulling or reset. After the side core pulling is completed, the lower end of the side core 3 completely leaves the cavity, and the upper end of the side core 3 is just at the lower right end of the arc chute.

The top of the fixed platen 8 is fixedly installed with a bump, and the top of the bump rolls and installs the roller 7. When the moving platen 1 and the fixed platen 8 are closed, the roller 7 has a downward force on the lever 5. When the moving platen 1 and the fixed platen 8. Begin parting until enough mold release, roller 7 is always in contact with lever 5 and roller 7 exerts downward pressure on lever 5. When the movable platen 1 and the fixed platen 8 are parted enough to be released from the mold, the spring 6 is in a compressed state. Based on the lever side core side core pulling mechanism of this embodiment, when molding the plastic part 2 , the part of the side core 3 extending into the cavity is used as the core for forming the small holes of the plastic part 2 . After the mold is opened, the movable platen 1 and the fixed platen 8 begin to be parted, and at the same time the lever 5 is in contact with the roller 7, and the roller 7 can only roll and cannot move because it is mounted on the bump of the fixed platen 8, so the lever 5 revolves around the template. The lever fulcrum on 1 is turned clockwise at a small angle (the spring 6 is compressed at this time), the turning angle depends on the length of the core pulling distance, the side pulling distance is short, the turning angle of the lever 5 is small, otherwise the turning angle is large. The lever is turned clockwise, and the side core 3 on the driving template 1 is moved upward in the side core hole through the arc chute at the left end to realize side core pulling. After the side core pulling is completed, the side core is completely pulled out from the small hole of the plastic part, and then the side core is no longer moved up. Pieces ejected. The right end of the lever 5 is long enough to ensure that the lever 5 does not leave the roller 7 after contacting the roller 7, that is, the roller 7 always presses the lever 5, so that the side core 3 will not enter the small hole of the plastic part at will after the side core pulling is completed. The effectiveness of the core-pulling action.

When the movable platen 1 is reset (that is, when the movable platen 1 and the fixed platen 8 are closed), since the right end of the lever 5 is always pressed by the roller 7 and does not leave the roller 7, when the movable platen 1 moves to the right, the lever 5 revolves around its axis. The heart is turned counterclockwise at a small angle, driving the side core 3 to move down in the side core hole, completing the reset, and the movable platen 1 and the fixed platen 8 are also closed.

In order to make the demolding stable and reliable, the above-mentioned lever-side core-side core-pulling mechanism can be installed symmetrically.

Taking the above ideal embodiments according to the present invention as inspiration, and through the above description, relevant personnel can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the contents in the specification, and the technical scope must be determined according to the scope of the claims.

Claims (3)

1. A lever side core-pulling mechanism, characterized in that it comprises a moving template (1), a side core (3), a lever (5) with an arc chute on the left end, a fixed template (8) and a fixed template (8) for fixing The fixed mold base plate (9) of the fixed mold plate, and the movable mold plate (1) can move left and right relative to the fixed mold plate (8); The top of the movable template (1) is sequentially provided with a vertical side core hole, a lever fulcrum and a groove with a spring (6) inside from left to right, and the movable template (1) is provided with a cavity; The opening of the core hole is upward and the bottom is connected to the cavity, one end of the spring (6) is fixedly connected to the bottom of the groove, and the other end of the spring (6) is fixedly connected to the lever (5). , the spring (6) has a downward pulling force on the lever (5); The lever (5) is arc-shaped and the arc-shaped opening is upward, the lever (5) is hinged with the lever fulcrum, one end of the side core (3) is slidably installed in the arc chute of the lever (5), and the side core (3) The other end protrudes from the side core hole into the cavity, and the side core and the side core hole are gap-fitted; the radius of the arc chute is equal to the distance between the lever fulcrum and the upper left end of the arc chute. The lever (5) is turned over, the side core (3) can slide along the arc chute, and at the same time the side core makes a vertical upward or vertical downward linear movement in the side core hole, thereby realizing side core pulling or reset; The top of the fixed platen (8) is fixedly installed with bumps, and the top of the bumps rolls and installs the rollers (7). contact and apply downward pressure on the lever; After the side core pulling is completed, the lower end of the side core (3) completely leaves the cavity, and the upper end of the side core (3) is just at the lower right end of the arc chute; The top of the movable template (1) is provided with a second groove, the side core holes are located at the bottom of the second groove and communicate with the cavity, a core sleeve is placed in the second groove, and a vertical core sleeve is arranged in the core sleeve. Direction through hole, the through hole is coaxial with the side core hole and the size is corresponding, the bottom of the side core (3) is inserted from the through hole and protrudes into the side core hole, and then enters the cavity; the core sleeve and the second groove There is a transition fit between the through holes on the core sleeve, the side core holes in the second groove and the side cores with clearance fit. 2 . The lever-side core pulling mechanism according to claim 1 , wherein the spring ( 6 ) is in a compressed state when the movable template ( 1 ) and the fixed template ( 8 ) are sufficiently separated from the mold. 3 . 3. The lever-side core-pulling mechanism according to claim 1, wherein the roller (7) has a downward force on the lever (5) when the movable template (1) and the fixed template (8) are completely closed. .

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