CN215661629U - Injection mold thimble mounting structure - Google Patents
Injection mold thimble mounting structure Download PDFInfo
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- CN215661629U CN215661629U CN202121382856.1U CN202121382856U CN215661629U CN 215661629 U CN215661629 U CN 215661629U CN 202121382856 U CN202121382856 U CN 202121382856U CN 215661629 U CN215661629 U CN 215661629U
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- thimble
- ejector pin
- pulley
- mounting structure
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Abstract
An injection mold thimble mounting structure comprises a lower die, a top plate, a mounting box and a thimble assembly; the thimble assembly comprises a thimble, a mounting plate, a spring, a limiting plate and a pulley; the installation box is arranged at the bottom of the workbench; the lower die is arranged on the workbench; the top plate is arranged inside the lower die; a plurality of thimbles are uniformly distributed at equal intervals; the upper end of the ejector pin penetrates through the lower die and is connected with the bottom of the top plate; the lower part of the thimble penetrates through the mounting box and is connected with the mounting plate; the bottom of the mounting plate is provided with a support leg, and the pulley is mounted at the bottom of the support leg; and an ejection mechanism used for pushing the pulley to move along the vertical direction is arranged below the pulley. According to the utility model, the casting piece can be smoothly ejected out of the lower die, and the overall working efficiency of the equipment is improved.
Description
Technical Field
The utility model relates to the field, in particular to an injection mold thimble mounting structure.
Background
An injection mold is a tool for producing plastic products; and is also a tool for giving the plastic product complete structure and accurate dimension. Injection molding is a processing method used for mass production of parts with complex shapes, and particularly relates to a method for injecting heated and melted plastic into a mold cavity from an injection molding machine at high pressure, and obtaining a formed product after cooling and solidification.
The ejector pin is an accessory of a plastic mold and is used for ejecting a product after the product is subjected to injection molding.
The existing ejector pin has the defects that the force applied to the top plate is uneven in the working process, meanwhile, the top plate is high in ascending speed, and large negative pressure is easily generated between the top plate and the bottom of the lower die, so that the top plate is difficult to move. Meanwhile, how to reset the thimble to the original position after the operation is also a problem.
Therefore, how to eject the top plate through the ejector pin with high efficiency and high quality is a problem to be solved.
SUMMERY OF THE UTILITY MODEL
Objects of the utility model
In order to solve the technical problems in the background art, the utility model provides the injection mold thimble mounting structure, which ensures that a casting piece can be smoothly ejected out of a lower mold, and improves the overall working efficiency of equipment.
(II) technical scheme
In order to solve the problems, the utility model provides an injection mold thimble mounting structure, which comprises a lower die, a top plate, a mounting box and a thimble assembly, wherein the lower die is provided with a lower die cavity and a lower die cavity; the thimble assembly comprises a thimble, a mounting plate, a spring, a limiting plate and a pulley;
the installation box is arranged at the bottom of the workbench; the lower die is arranged on the workbench; the top plate is arranged inside the lower die;
a plurality of thimbles are uniformly distributed at equal intervals; the upper end of the ejector pin penetrates through the lower die and is connected with the bottom of the top plate; the lower part of the thimble penetrates through the mounting box and is connected with the mounting plate; the bottom of the mounting plate is provided with a support leg, and the pulley is mounted at the bottom of the support leg;
the spring, the limiting plate and the middle part of the thimble are all positioned in the installation box; the limiting plate is fixedly arranged on the thimble; the spring is sleeved on the periphery of the thimble, the upper end of the spring is connected with the lower surface of the limiting plate, and the lower end of the spring is connected with the bottom of the mounting box;
and an ejection mechanism used for pushing the pulley to move along the vertical direction is arranged below the pulley.
Preferably, the bottom of the top plate is provided with a first threaded blind hole with a downward opening, the upper end of the ejector pin is screwed into the first threaded blind hole in a threaded fit manner, and the ejector pin is in threaded connection with the top plate.
Preferably, the upper surface of the mounting plate is provided with a second threaded blind hole with an upward opening, the lower end of the ejector pin is screwed into the second threaded blind hole in a threaded fit manner, and the ejector pin is in threaded connection with the mounting plate.
Preferably, the thimble is a hollow tube; the bottom of the thimble is provided with an air inlet; the top of the thimble is provided with an air outlet; wherein, the venthole is located the inside of lower mould.
Preferably, the bottom of the installation box is provided with a guide pipe along the vertical downward direction; the thimble is matched with and slides through the guide pipe.
Preferably, the ejection mechanism comprises a rotary disc, an ejection part and power equipment; the turntable is positioned below the workbench; the power equipment is in power connection with the turntable; the ejection part is a strip-shaped bulge, and the strip-shaped bulge is in an arc shape concentric with the turntable; the middle part of the ejection part is a horizontal plane and gradually inclines downwards along the middle part towards two ends to be tangent to the upper surface of the rotary table; the rotary table, the ejection part and the pulley are linked to drive the ejector pin assembly to move in the vertical direction.
Preferably, the middle part of the ejection part is a horizontal section; the two ends of the ejection part are curve sections which respectively comprise a first curve section, a second curve section and a third curve section; the first curve section is in a downward-concave arc shape, and the lower end of the first curve section is tangent to the upper surface of the turntable; the third curve section is in an upward convex arc shape, and the upper end of the third curve section is tangent to the middle part of the ejection part; the second curve segment is a curve segment connecting the first curve segment and the third curve segment.
Preferably, two sides of the turntable are provided with a workbench; two ejection components are correspondingly arranged on the rotary table; wherein, the diameter of the connecting line of the two work tables is vertical to the diameter of the connecting line of the two ejection components.
Preferably, the power device controls the rotating disc to rotate 180 degrees at a time.
According to the utility model, the ejection mechanism pushes the pulley to vertically move upwards, so that the mounting plate drives the plurality of ejector pins to move upwards (the limiting plate also moves upwards, so that the spring is in a stretching state), and the plurality of ejector pins simultaneously push the top plate to move upwards, so that the top plate can keep a horizontal state (or a state parallel to the bottom of the lower die) to move upwards; the top plate moves stably, so that the cast part cannot incline, the phenomenon that the cast-in-place casting is clamped in the lower die cannot occur, and the cast part can be smoothly ejected out of the lower die.
In the utility model, when the thimble moves upwards, the air outlet of the thimble is positioned in the lower die, and outside air enters the lower die from the bottom of the thimble, so that negative pressure is prevented from being generated at the bottom of the lower die, and the smooth upward movement of the top plate is ensured. Wherein, the casting takes out the process stably smooth, has improved the whole work efficiency of equipment.
Drawings
Fig. 1 is a front view of an injection mold thimble mounting structure according to the present invention.
Fig. 2 is a perspective view of a part of the structure of the injection mold thimble mounting structure according to the present invention.
Fig. 3 is an enlarged schematic view of a thimble structure in the thimble mounting structure of the injection mold according to the present invention.
Fig. 4 is a schematic structural diagram of a part of an ejection part in the injection mold ejector pin mounting structure according to the present invention.
FIG. 5 is a partial structural plan view of an embodiment of an injection mold thimble mounting structure according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-3, the injection mold thimble mounting structure provided by the present invention comprises a lower mold 2, a top plate 21, a mounting box 3 and a thimble assembly 4; the thimble assembly 4 comprises a thimble 41, a mounting plate 42, a spring 43, a limit plate 44 and a pulley 45;
the installation box 3 is arranged at the bottom of the workbench 1; the lower die 2 is arranged on the workbench 1; the top plate 21 is arranged inside the lower die 2;
a plurality of thimbles 41 are uniformly distributed at equal intervals; the upper end of the thimble 41 penetrates through the lower die 2 and is connected with the bottom of the top plate 21; the lower part of the thimble 41 passes through the installation box 3 and is connected with the installation plate 42; the bottom of the mounting plate 42 is provided with a support leg, and the pulley 45 is mounted at the bottom of the support leg;
the spring 43, the limiting plate 44 and the middle part of the thimble 41 are all positioned in the installation box 3; the limiting plate 44 is fixedly arranged on the thimble 41; the spring 43 is sleeved on the periphery of the thimble 41, the upper end of the spring 43 is connected with the lower surface of the limit plate 44, and the lower end of the spring 43 is connected with the bottom of the installation box 3;
an ejection mechanism 5 for pushing the pulley 45 to move along the vertical direction is arranged below the pulley 45.
In the utility model, the ejection mechanism 5 pushes the pulley 45 to move vertically upwards, and then the mounting plate 42 drives the plurality of ejector pins 41 to move upwards (the limiting plate 44 also moves upwards, so that the spring 3 is in a stretching state), and the plurality of ejector pins 41 simultaneously push the top plate 21 to move upwards, so that the top plate 21 can keep a horizontal state (or a state parallel to the bottom of the lower die 2) to move upwards; the top plate 21 moves stably, so that the cast part cannot incline, the phenomenon that the cast-in-place casting is clamped in the lower die 2 cannot occur, and the cast part can be smoothly ejected out of the lower die 2.
In the utility model, after a casting is taken out, the ejection mechanism 5 is moved to an initial position; under the action of the spring 43, the spring 43 pulls the limit plate 44 (to drive the thimble 41) to move downwards to the initial position, so that the thimble and the top plate can be automatically reset without manual operation, and the labor and the time are saved;
it should be noted that the limiting plate 44 is detachably connected to the thimble 41, and when the limiting plate 44 moves upward to the maximum stroke, the limiting plate 44 does not contact with the lower surface of the table 1, so as to ensure smooth discharging of the casting (as shown in fig. 2).
In the utility model, the bottom of the mounting plate 42 is provided with a support leg, the pulley 45 is arranged at the bottom of the support leg, and rolling friction is formed between the pulley 45 and the ejection mechanism 5, so that the friction force is reduced, and the mechanical energy consumption is reduced.
In an alternative embodiment, the bottom of the top plate 21 is provided with a first threaded blind hole with a downward opening, the upper end of the thimble 41 is screwed into the first threaded blind hole in a threaded manner, and the thimble 41 is in threaded connection with the top plate 21.
In an alternative embodiment, the upper surface of the mounting plate 42 is provided with a second threaded blind hole which is opened upwards, the lower end of the ejector pin 41 is screwed into the second threaded blind hole in a threaded fit manner, and the ejector pin 41 is in threaded connection with the mounting plate 42.
It should be noted that, this equipment is convenient for install, dismantle, change and maintenance, improves the availability factor of equipment.
In an alternative embodiment, the thimble 41 is a hollow tube; an air inlet hole 46 is formed at the bottom of the ejector pin 41; the top of the thimble 41 is provided with an air outlet 47; wherein, the air outlet 47 is positioned inside the lower die 2.
In operation, when the thimble 41 moves upward, the air outlet of the thimble 41 is located inside the lower mold 2, and the outside air enters the inside of the lower mold 2 from the bottom of the thimble 41 (the air passes through the inside of the thimble 41 from the air inlet 46 and enters the inside of the lower mold 2 from the air outlet 47), so as to avoid the negative pressure from being generated at the bottom of the lower mold, and to ensure the smooth upward movement of the top plate 21.
In an alternative embodiment, the bottom of the installation box 3 is provided with a guide pipe 31 along the vertical downward direction; the thimble 41 is fitted to slide through the guide tube 31.
It should be noted that, the arrangement of the guide tube 31 further ensures that the thimble 41 moves vertically upward, thereby ensuring that the top plate 21 moves stably upward, and avoiding the situation that the casting piece is clamped in the lower die 2 and cannot be taken out due to the inclination of the top plate 21.
As shown in fig. 4: in an alternative embodiment, the ejection mechanism 5 comprises a rotary disc 50, an ejection part and a power device 9; the turntable 50 is positioned below the workbench 1;
the power equipment 9 is in power connection with the rotary disc 50; the ejection part is a strip-shaped bulge, and the strip-shaped bulge is in an arc shape concentric with the turntable 50;
the middle part of the ejection part is a horizontal plane and gradually inclines downwards along the middle part towards the two ends to be tangent with the upper surface of the rotating disc 50;
the rotary table 50 and the ejection part are linked with the pulley 45 to drive the ejector pin assembly 4 to move along the vertical direction.
In an alternative embodiment, the middle part of the ejection part is a horizontal section; the two ends of the ejection part are curve sections which respectively comprise a first curve section 51, a second curve section 52 and a third curve section 53;
the first curve segment 51 is in a downward concave arc shape, and the lower end of the first curve segment 51 is tangent to the upper surface of the turntable 50;
the third curve section 53 is in an upward convex arc shape, and the upper end of the third curve section 53 is tangent to the middle part of the ejection part;
the second curve segment 52 is a curve segment connecting the first curve segment 51 and the third curve segment 53.
It should be noted that, in the process that the power device 9 controls the rotation of the turntable 50, the ejector component acts on the ejector pin assembly 4, so as to realize the ejection process of the casting.
The ejection part comprises the following processes in operation:
in the first process, the thimble 41 is raised;
firstly, the pulley 45 moves to the upper part of the first curve section 51, and the lower end of the first curve section 51 is tangent to the upper surface of the turntable 50, so that the pulley 45 does not bump, and at the moment, the pulley 45 slowly rises to drive the top plate 21 to start rising for a part of distance to adapt to the rising process;
then, the pulley 45 moves the second curve segment 52, and the pulley 45 rapidly ascends due to the large inclination of the second curve segment 52; since the top plate 21 is already in the normal ascent stage (under the preheating of the first curve section 51), the top plate 21 can be quickly ascended without hindrance;
finally, the pulley 45 moves to the third curve section 53, and the rising speed of the pulley 45 decreases. Because most of the casting part (the upper part and the middle part) is separated from the lower die, in order to ensure the stability of the casting part, the rising speed of the casting part is reduced through the third curve section 53, the movement of the casting part is more stable, and meanwhile, the smoothness of manual taking (casting) is ensured.
In the second process, the horizontal height of the thimble 41 is inconvenient;
at the moment, the pulley 45 rolls on the horizontal section in the middle of the ejection part, and the process is reserved for operators (or intelligent mechanical claws) to facilitate the smooth taking away of the casting;
in the third process, the thimble 41 descends; the pulley 45 continues to move to fall on the turntable; under the action of the pulling force of the spring 3, the thimble 41 drives the top plate 21 to return to the initial position, so as to prepare for the next pouring.
As shown in fig. 5: in an alternative embodiment, the working tables 1 are arranged on both sides of the rotating disc 50; two ejection components are correspondingly arranged on the rotary table 50; wherein, the diameter of the connecting line of the two work tables 1 is vertical to the diameter of the connecting line of the two ejection components.
In an alternative embodiment, the power unit 9 controls the rotation of the turntable 50 by 180 degrees at a time.
It should be noted that, each time the power device 9 controls the rotation of the rotary table 50 by 180 degrees, the two pin ejecting components can simultaneously act on the two pin assemblies 4 to simultaneously complete the taking-out process of the two castings, so as to improve the working efficiency in unit time.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. An injection mold thimble mounting structure is characterized by comprising a lower mold (2), a top plate (21), a mounting box (3) and a thimble assembly (4); the ejector pin assembly (4) comprises an ejector pin (41), a mounting plate (42), a spring (43), a limiting plate (44) and a pulley (45);
the installation box (3) is arranged at the bottom of the workbench (1); the lower die (2) is arranged on the workbench (1); the top plate (21) is arranged inside the lower die (2);
a plurality of thimbles (41) are uniformly distributed at equal intervals; the upper end of the thimble (41) penetrates through the lower die (2) and is connected with the bottom of the top plate (21); the lower part of the thimble (41) penetrates through the installation box (3) and is connected with the installation plate (42); the bottom of the mounting plate (42) is provided with a support leg, and the pulley (45) is mounted at the bottom of the support leg;
the middle parts of the spring (43), the limiting plate (44) and the ejector pin (41) are all positioned in the installation box (3); the limiting plate (44) is fixedly arranged on the ejector pin (41); the spring (43) is sleeved on the periphery of the thimble (41), the upper end of the spring (43) is connected with the lower surface of the limiting plate (44), and the lower end of the spring (43) is connected with the bottom of the installation box (3);
an ejection mechanism (5) used for pushing the pulley (45) to move along the vertical direction is arranged below the pulley (45).
2. An injection mold thimble mounting structure according to claim 1, wherein the bottom of the top plate (21) is provided with a first threaded blind hole with a downward opening, the upper end of the thimble (41) is screwed into the first threaded blind hole in a threaded manner, and the thimble (41) is in threaded connection with the top plate (21).
3. An injection mold thimble mounting structure according to claim 1, wherein the upper surface of the mounting plate (42) is provided with a second threaded blind hole having an upward opening, the lower end of the thimble (41) is screwed into the second threaded blind hole in a threaded manner, and the thimble (41) is in threaded connection with the mounting plate (42).
4. An injection mold thimble mounting structure according to claim 1, wherein said thimble (41) is a hollow tube; an air inlet hole (46) is formed in the bottom of the ejector pin (41); the top of the thimble (41) is provided with an air outlet (47); wherein, the air outlet (47) is positioned in the lower die (2).
5. An injection mold ejector pin mounting structure according to claim 1, wherein a guide tube (31) is provided in a vertically downward direction at a bottom of said mounting case (3); the thimble (41) is matched and slides to penetrate through the guide pipe (31).
6. An injection mold ejector pin mounting structure according to claim 1, wherein said ejector mechanism (5) comprises a rotary table (50), an ejector member, and a power device (9); the rotary table (50) is positioned below the workbench (1);
the power equipment (9) is in power connection with a turntable (50); the ejection part is a strip-shaped bulge, and the strip-shaped bulge is in an arc shape concentric with the rotary table (50);
the middle part of the ejection part is a horizontal plane and gradually inclines downwards along the middle part towards two ends to be tangent with the upper surface of the rotary table (50);
the rotary table (50) and the ejection part are linked with the pulley (45) to drive the ejector pin assembly (4) to move along the vertical direction.
7. An injection mold thimble mounting structure according to claim 6, wherein a middle portion of the ejector member is a horizontal section; the two ends of the ejection part are curve sections which respectively comprise a first curve section (51), a second curve section (52) and a third curve section (53);
the first curve segment (51) is in a downward-concave arc shape, and the lower end of the first curve segment (51) is tangent to the upper surface of the turntable (50);
the third curve section (53) is in an upward convex arc shape, and the upper end of the third curve section (53) is tangent to the middle part of the ejection part;
the second curve section (52) is a curve section connecting the first curve section (51) and the third curve section (53).
8. An injection mould ejector pin mounting structure according to any one of claims 6-7, characterized in that a workbench (1) is arranged on both sides of the turntable (50); two ejection components are correspondingly arranged on the rotary table (50); wherein, the diameter of the connecting line of the two work tables (1) is vertical to the diameter of the connecting line of the two ejection components.
9. An injection mould ejector pin mounting structure according to claim 8, characterized in that said power device (9) controls the rotation of the rotary plate (50) 180 degrees at a time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121382856.1U CN215661629U (en) | 2021-06-21 | 2021-06-21 | Injection mold thimble mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121382856.1U CN215661629U (en) | 2021-06-21 | 2021-06-21 | Injection mold thimble mounting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215661629U true CN215661629U (en) | 2022-01-28 |
Family
ID=79976221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121382856.1U Active CN215661629U (en) | 2021-06-21 | 2021-06-21 | Injection mold thimble mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215661629U (en) |
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2021
- 2021-06-21 CN CN202121382856.1U patent/CN215661629U/en active Active
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