Die core

Abstract

The utility model relates to the technical field of injection molds, in particular to a mold core which comprises a mold core main body, a resetting mechanism, a demolding mechanism and a driving mechanism, a mounting cavity is formed in the mold core main body; a top plate is movably connected to the bottom of the mold core main body; one end of each reset mechanism is connected with the top plate, and the other end of each reset mechanism extends into the mounting cavity; the demolding mechanism is arranged in the mounting cavity, and one end of the demolding mechanism extends out of the mold core main body; the driving mechanism is arranged on the mold core body, and the output end of the driving mechanism is connected with the demolding mechanism. Through cooperative arrangement of the driving mechanism and the rapping mechanism, when demolding is needed, the driving mechanism works to drive the rapping mechanism to rotate, and the convex block rotates and is matched with the limiting boss and the connecting rod to drive the top plate to vibrate at high frequency, so that the mold core main body and an injection molding part are loosened, the difficulty of separating a product from the mold core is reduced, and the demolding efficiency is improved; and meanwhile, the product demolding yield can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a mold core. Background Art

[0002] The mold core, a key component of the mold, plays a vital role in product formation. For some hollow products, such as hollow sleeves, the mold core used is designed as an integrally formed body of revolution, with a rim and a convex portion, both located at the outer periphery and extending along its circumference. The convex portion protrudes outward relative to the rim. During use, the product is wrapped around the mold core after formation, making it difficult to remove from the mold core. This can lead to product breakage, a high rate of defective demolding, or low demolding efficiency, far from meeting industry requirements.

[0003] The Chinese patent with announcement number CN218803404U discloses a combined mold core, including a first mating core and a second mating core; the first mating core and the second mating core are both in the shape of a body of revolution; the lower end of the first mating core is provided with an insertion shaft; the second mating core is provided with an insertion hole; the insertion shaft is inserted into the insertion hole; the first mating core is provided with a first annular edge and a second annular edge; the second mating core is provided with an outer protrusion, the outer protrusion is provided at the outer periphery of the second mating core and extends along the circumferential direction of the second mating core; the outer protrusion protrudes outward relative to the first annular edge and the second annular edge. The utility model adopts the combination of the first mating core and the second mating core. When the product is demolded, the second mating core can be separated from the product first, and then the product can be separated from the first mating core. This can reduce the demolding resistance and the difficulty of the product being separated from the mold core, thereby reducing the product demolding defect rate and improving efficiency.

[0004] However, the above technical solution has the following shortcomings: for injection molded parts with deep cavities or where a split mold core cannot be used, the product is tightly wrapped outside the mold core after molding, which makes it difficult for the product to be separated from the mold core and the demolding efficiency is low. Using a simple ejection structure to directly eject the injection molded part can easily cause product damage and result in a low product demolding yield rate. Utility Model Content

[0005] The utility model aims to provide a mold core in view of the problems existing in the background technology.

[0006] The technical solution of the utility model is: a mold core, comprising:

[0007] The mold core body has an installation cavity formed therein, and the bottom of the mold core body is movably connected to the top plate;

[0008] A reset mechanism is provided in multiple groups, one end of the reset mechanism is connected to the top plate, and the other end of the reset mechanism extends into the installation cavity;

[0009] A demoulding mechanism is disposed in the mounting cavity, and one end of the demoulding mechanism extends to the outside of the mold core body;

[0010] The driving mechanism is arranged on the mold core body, and the output end of the driving mechanism is connected to the demoulding mechanism.

[0011] Preferably, a plurality of connecting rods are fixedly connected to the top of the mold core body for connecting with an external driving member, and a mounting groove is provided at the bottom of the mold core body, and the top plate is movably arranged in the mounting groove.

[0012] Preferably, each set of reset mechanisms includes a connecting rod, a limiting boss and a reset spring; one end of the connecting rod is fixedly connected to the top plate, the other end of the connecting rod passes through the mold core body and extends into the installation cavity, the limiting boss is fixedly connected to the connecting rod, one end of the reset spring is fixedly connected to the inner wall of the installation cavity, and the other end of the reset spring is fixedly connected to the limiting boss.

[0013] Preferably, the demolding mechanism includes a mounting plate, an elastic member, a mounting rod and a protrusion; the mounting plate is movably arranged in the mounting cavity, one end of the elastic member is fixedly connected to the inner wall of the mounting cavity, the other end of the elastic member is fixedly connected to the mounting plate, one end of the mounting rod is connected to the mounting plate, and the other end of the mounting plate passes through the mounting cavity and the core mold body and extends to the outside of the core mold body. A plurality of protrusions are provided, and the protrusions are fixedly connected to the mounting plate.

[0014] Preferably, the driving mechanism includes an installation box, a driving motor, a installation cylinder, a bevel gear and a bevel gear ring. The installation box is fixedly connected to the mold core body, the driving motor is fixedly connected to the installation box, the installation cylinder is rotatably arranged in the installation box, the installation cylinder is sleeved on the surface of the installation rod, the installation rod is slidingly connected to the installation cylinder in the axial direction, the bevel gear ring is fixedly connected to the installation cylinder, the bevel gear is fixedly connected to the output end of the driving motor, and the bevel gear and the bevel gear ring are engaged with each other.

[0015] Preferably, one side of the top of the installation box is rotatably connected to an adjusting rod, and the other side of the top of the installation box is fixedly connected to a control switch, and the control switch is electrically connected to the drive motor through a wire.

[0016] Compared with the prior art, the above technical solution of the present invention has the following beneficial technical effects:

[0017] The utility model realizes the high-frequency vibration of the injection molded part through the coordinated arrangement between the driving mechanism and the vibrating mechanism. When demoulding is required, the driving mechanism drives the vibrating mechanism to rotate, and the rotation of the convex block cooperates with the limiting boss and the connecting rod to drive the top plate to vibrate at high frequency, thereby achieving the effect of high-frequency vibration of the injection molded part, causing loosening between the mold core body and the injection molded part, reducing the difficulty of the product being separated from the mold core, improving the demoulding efficiency, and at the same time improving the product demoulding yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of an embodiment of the present invention;

[0019] Figure 2 A cross-sectional view of an embodiment of the present invention;

[0020] Figure 3 This is a three-dimensional diagram of a reset mechanism in an embodiment of the present invention;

[0021] Figure 4 A three-dimensional diagram of a demoulding mechanism in an embodiment of the present invention;

[0022] Figure 5 This is a three-dimensional diagram of a driving mechanism in an embodiment of the present invention.

[0023] Figure numerals: 1. Mold core body; 2. Mounting cavity; 3. Reset mechanism; 31. Connecting rod; 32. Limiting boss; 33. Reset spring; 4. Demolding mechanism; 41. Mounting plate; 42. Elastic member; 43. Mounting rod; 44. Bump; 5. Driving mechanism; 51. Mounting box; 52. Driving motor; 53. Mounting cylinder; 54. Bevel gear; 55. Bevel gear ring; 56. Adjusting rod; 57. Control switch; 6. Top plate; 7. Connecting rod; 8. Mounting groove. DETAILED DESCRIPTION

[0024] Example 1

[0025] like Figure 1-5 As shown, a mold core proposed by the present invention includes a mold core body 1, a reset mechanism 3, a demoulding mechanism 4 and a driving mechanism 5;

[0026] The mold core body 1 has an installation cavity 2 formed inside, a top plate 6 movably connected to the bottom of the mold core body 1, a plurality of connecting rods 7 fixedly connected to the top of the mold core body 1 for connecting to an external driving member, and an installation groove 8 formed at the bottom of the mold core body 1, in which the top plate 6 is movably disposed.

[0027] The reset mechanism 3 is provided with multiple groups, one end of the reset mechanism 3 is connected to the top plate 6, and the other end of the reset mechanism 3 extends into the installation cavity 2;

[0028] The demoulding mechanism 4 is arranged in the installation cavity 2, and one end of the demoulding mechanism 4 extends to the outside of the core body 1;

[0029] The driving mechanism 5 is arranged on the mold core body 1 , and an output end of the driving mechanism 5 is connected to the demoulding mechanism 4 .

[0030] Example 2

[0031] like Figure 2-3 As shown, a mold core proposed by the present invention, compared with embodiment 1, this embodiment further specifically discloses the structure of the reset mechanism 3; each set of reset mechanisms 3 includes a connecting rod 31, a limiting boss 32 and a reset spring 33; one end of the connecting rod 31 is fixedly connected to the top plate 6, the other end of the connecting rod 31 passes through the mold core body 1 and extends into the installation cavity 2, the limiting boss 32 is fixedly connected to the connecting rod 31, one end of the reset spring 33 is fixedly connected to the inner wall of the installation cavity 2, and the other end of the reset spring 33 is fixedly connected to the limiting boss 32.

[0032] Example 3

[0033] like Figure 2-4 As shown, a mold core proposed by the present invention, compared with the second embodiment, this embodiment further specifically discloses the structure of the demolding mechanism 4; the demolding mechanism 4 includes a mounting plate 41, an elastic member 42, a mounting rod 43 and a protrusion 44; the mounting plate 41 is movably arranged in the mounting cavity 2, one end of the elastic member 42 is fixedly connected to the inner wall of the mounting cavity 2, the other end of the elastic member 42 is fixedly connected to the mounting plate 41, one end of the mounting rod 43 is connected to the mounting plate 41, and the other end of the mounting plate 41 passes through the mounting cavity 2 and the mold core body 1 and extends to the outside of the mold core body 1, and a plurality of protrusions 44 are provided, and the protrusions 44 are fixedly connected to the mounting plate 41.

[0034] Example 4

[0035] like Figure 2-5As shown, a mold core proposed by the present invention, compared with the third embodiment, this embodiment further specifically discloses the structure of the driving mechanism 5; the driving mechanism 5 includes an installation box 51, a driving motor 52, a installation cylinder 53, a bevel gear 54 and a bevel gear ring 55, the installation box 51 is fixedly connected to the mold core body 1, the driving motor 52 is fixedly connected to the installation box 51, the driving motor 52 is a variable frequency motor, which is connected to the control system and the power supply through a wire, the installation cylinder 53 is rotatably arranged in the installation box 51, the installation cylinder 53 is sleeved on the surface of the installation rod 43, the installation rod 43 is slidably connected to the installation cylinder 53 in the axial direction, the installation rod 43 and the installation cylinder 53 are slidably connected through a guide groove and a guide block, the bevel gear ring 55 is fixedly connected to the installation cylinder 53, the bevel gear 54 is fixedly connected to the output end of the driving motor 52, the bevel gear 54 and the bevel gear ring 55 are meshed with each other, one side of the top of the installation box 51 is rotatably connected to the adjusting rod 56, and the other side of the top of the installation box 51 is fixedly connected to the control switch 57, and the control switch 57 is electrically connected to the driving motor 52 through a wire.

[0036] When the mold core needs to be separated from the molded part after the injection molding is completed, the adjusting rod 56 is rotated. The adjusting rod 56 rotates through the mounting rod 43 to push the mounting plate 41 to the working position. At the same time, the adjusting rod 56 triggers the control switch 57. The control switch 57 is triggered to drive the motor 52 to work and drive the bevel gear 54 to rotate. The rotation of the bevel gear 54 drives the bevel gear ring 55 and the mounting cylinder 53 to rotate together through the meshing action. The rotation of the mounting cylinder 53 drives the mounting plate 41 and the protrusion 44 to rotate together through the mounting rod 43. The rotation of the protrusion 44 cooperates with the limiting boss 32 and the connecting rod 31 to drive the top plate 6 to vibrate at high frequency, thereby achieving the effect of high-frequency vibration of the injection molded part, thereby facilitating the separation between the mold core body 1 and the injection molded part.

[0037] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A mold core, characterized in that: include: A core body (1) is provided with a mounting cavity (2) therein, and a top plate (6) is movably connected to the bottom of the core body (1); A reset mechanism (3) is provided in multiple groups, one end of the reset mechanism (3) is connected to the top plate (6), and the other end of the reset mechanism (3) extends into the installation cavity (2); A demoulding mechanism (4) is arranged in the installation cavity (2), and one end of the demoulding mechanism (4) extends to the outside of the mold core body (1); A driving mechanism (5) is arranged on the mold core body (1), and an output end of the driving mechanism (5) is connected to the demoulding mechanism (4).

2. A mold core according to claim 1, characterized in that: The top of the mold core body (1) is fixedly connected with a plurality of connecting rods (7) for connecting with an external driving component. The bottom of the mold core body (1) is provided with a mounting groove (8), and the top plate (6) is movably arranged in the mounting groove (8).

3. A mold core according to claim 1, characterized in that: Each set of reset mechanisms (3) includes a connecting rod (31), a limiting boss (32) and a reset spring (33); one end of the connecting rod (31) is fixedly connected to the top plate (6), the other end of the connecting rod (31) passes through the mold core body (1) and extends into the installation cavity (2), the limiting boss (32) is fixedly connected to the connecting rod (31), one end of the reset spring (33) is fixedly connected to the inner wall of the installation cavity (2), and the other end of the reset spring (33) is fixedly connected to the limiting boss (32).

4. A mold core according to claim 1, characterized in that: The demoulding mechanism (4) comprises a mounting plate (41), an elastic member (42), a mounting rod (43) and a protrusion (44); the mounting plate (41) is movably arranged in the mounting cavity (2); one end of the elastic member (42) is fixedly connected to the inner wall of the mounting cavity (2); the other end of the elastic member (42) is fixedly connected to the mounting plate (41); one end of the mounting rod (43) is connected to the mounting plate (41); the other end of the mounting plate (41) passes through the mounting cavity (2) and the mold core body (1) and extends to the outside of the mold core body (1); a plurality of protrusions (44) are provided, and the protrusions (44) are fixedly connected to the mounting plate (41).

5. A mold core according to claim 4, characterized in that: The driving mechanism (5) comprises an installation box (51), a driving motor (52), an installation cylinder (53), a bevel gear (54) and a bevel gear ring (55); the installation box (51) is fixedly connected to the mold core body (1); the driving motor (52) is fixedly connected to the installation box (51); the installation cylinder (53) is rotatably arranged in the installation box (51); the installation cylinder (53) is sleeved on the surface of the installation rod (43); the installation rod (43) is slidably connected to the installation cylinder (53) in the axial direction; the bevel gear ring (55) is fixedly connected to the installation cylinder (53); the bevel gear (54) is fixedly connected to the output end of the driving motor (52); and the bevel gear (54) and the bevel gear ring (55) are meshed with each other.

6. A mold core according to claim 5, characterized in that: One side of the top of the installation box (51) is rotatably connected to an adjusting rod (56), and the other side of the top of the installation box (51) is fixedly connected to a control switch (57), and the control switch (57) is electrically connected to the driving motor (52) through a wire.

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