CN215703798U - Injection mold tooth shaft demolding structure - Google Patents
Injection mold tooth shaft demolding structure Download PDFInfo
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- CN215703798U CN215703798U CN202122462720.8U CN202122462720U CN215703798U CN 215703798 U CN215703798 U CN 215703798U CN 202122462720 U CN202122462720 U CN 202122462720U CN 215703798 U CN215703798 U CN 215703798U
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Abstract
The utility model discloses a tooth shaft demolding structure of an injection mold, which is arranged between a mold frame and a mold core, wherein the mold core comprises a front mold core and a rear mold core and comprises a tooth shaft, a mold core insert, a nut block, a rotary buckle insert, a transmission assembly and a driving unit, the mold core insert is of a half structure and wraps the tooth shaft, the mold core insert is embedded into the rear mold core, the exposed part at the top end of the tooth shaft is provided with a first screw section for tooth surface molding, an annular groove is arranged below the first screw section, the inner end of the rotary buckle insert is clamped in the annular groove, the middle part of the rotary buckle insert is hinged on the mold core insert through a rotating shaft bolt, and the outer end of the rotary buckle insert is used as a mold core of a buckle groove position; the tooth shaft is provided with a coaxial second screw section below the ring groove, and the nut block is in threaded connection with the second screw section and is clamped and fixed in the mold insert; the driving unit drives the tooth shaft to rotate through the transmission assembly. The injection mold tooth shaft demolding structure can simultaneously demold the tooth surface and the buckling groove position, simplifies the structure and improves demolding efficiency.
Description
Technical Field
The utility model relates to the technical field of injection molds, in particular to a tooth shaft demolding structure of an injection mold.
Background
At present, an injection mold is a tool which is matched with a plastic molding machine in the plastic processing industry and gives a complete configuration and an accurate size to a plastic product, and a mold slide generally refers to a slide mechanism of the mold, namely a mechanism which can obtain lateral core pulling or lateral parting and reset actions to pull out product inverted buckles, low sags and other positions. Most thread forming surfaces use a tooth shaft core, and the tooth shaft needs to be rotated to be released during demoulding. The rotary insert is mostly used as a core in a buckling slot on a product, and a plurality of rod pieces are needed to pull the rotary insert to swing for a certain angle during demoulding, so that demoulding is carried out.
However, in some products, the thread forming tooth surface and the fastening slot are located relatively close to each other, and if the corresponding demoulding mechanisms are respectively arranged, the mould is too complicated, the cost of the mould is increased, and mechanical failure is easy to occur.
Therefore, it is necessary to develop a tooth shaft demolding structure of an injection mold aiming at the defects.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a tooth shaft demolding structure of an injection mold, which can simultaneously demold a tooth surface and a buckling groove position, simplifies the structure and improves demolding efficiency.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model relates to a mold stripping structure of a tooth shaft of an injection mold, which is arranged between a mold frame and a mold core, wherein the mold core comprises a front mold core and a rear mold core and comprises a tooth shaft, a mold core insert, a nut block, a rotary buckle insert, a transmission component and a driving unit, the mold core insert is of a half structure and wraps the tooth shaft, the mold core insert is embedded into the rear mold core, the exposed part at the top end of the tooth shaft is provided with a first screw section for tooth surface forming, a ring groove is arranged below the first screw section, the inner end of the rotary buckle insert is clamped in the ring groove, the middle part of the rotary buckle insert is hinged on the mold core insert through a rotating shaft bolt, and the outer end of the rotary buckle insert is used as a mold core of a buckle groove position; the tooth shaft is provided with a coaxial second screw rod section below the annular groove, and the nut block is in threaded connection with the second screw rod section and is clamped and fixed in the mold core insert; the driving unit is arranged on the die carrier and drives the tooth shaft to rotate through the transmission assembly.
Further, transmission assembly includes gear sleeve, rack and locating piece, the locating piece sets up on the die carrier and sliding guide the rack, rack drive connects the external tooth of gear sleeve, gear sleeve sliding key structural connection the tooth axle tail-bar, gear sleeve both ends are erect through the bearing on the die carrier.
Furthermore, the sliding key structure specifically adopts a spline shaft and spline housing matching mode or a flat key and guide key groove matching mode.
Further, the transmission assembly further comprises a speed increasing structure, the speed increasing structure comprises an intermediate gear and a large gear which are meshed with each other, and the rack is driven by the large gear and the intermediate gear to drive the outer teeth of the gear sleeve.
Further, the driving unit specifically adopts an air cylinder, an oil cylinder or an electric push rod, the oil cylinder is installed on one side of the die carrier through a C-shaped oil cylinder support, and the top end of a piston rod of the oil cylinder is connected with the rack.
Further, the first screw section is a cylindrical screw thread or a conical screw thread.
Compared with the prior art, the utility model has the beneficial technical effects that:
the utility model discloses a tooth shaft demolding structure of an injection mold, which has the beneficial effects that:
according to the injection mold tooth shaft demolding structure, the annular groove is formed in the tooth shaft, the inner end of the rotating buckle insert is clamped in the annular groove, when the tooth shaft is demolded, the tooth shaft moves downwards and axially to drive the inner end of the rotating buckle insert to rotate downwards, and the mold core of the buckling groove position at the outer end of the rotating buckle insert rotates and then is demolded simultaneously. Namely, one rotation of the tooth shaft drives the formed tooth surface and the buckling slot position to be simultaneously demoulded. The mold insert adopts a half structure, so that the mold insert is convenient to install and disassemble and convenient to maintain. The injection mold tooth shaft demolding structure can simultaneously demold the tooth surface and the buckling groove position, simplifies the structure and improves demolding efficiency.
In addition, the tooth shaft is driven to rotate in a rack and pinion mode, so that the linear motion of the driving unit is converted into the rotary motion conveniently; the gear sleeve and the tooth shaft tail rod which are connected through the sliding key structure can realize axial movement in the rotating process, so that the rotating buckle insert is driven to be released or reset; through the setting of acceleration rate structure is convenient for improve drawing of patterns speed. The oil cylinder is used as a driving unit, other core pulling actions are completed under the assistance of the hydraulic oil cylinder, and the core pulling actions are conveniently integrated on the injection molding machine in a unified manner, so that the demolding actions are coordinated and consistent, and misoperation is avoided. Meanwhile, the hydraulic cylinder has large action force, so that the driving tooth shaft can be conveniently and rapidly demoulded.
Drawings
The utility model is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic sectional view of a mold stripping structure for installing the tooth shaft of the injection mold of the present invention;
FIG. 2 is another schematic structural view in angular section of the discharge structure for the tooth shaft of the injection mold according to the present invention;
FIG. 3 is a schematic view of a three-dimensional structure of a tooth shaft demolding structure of the injection mold of the utility model;
fig. 4 is a schematic view of the top structure of the dental shaft of the present invention.
Description of reference numerals: 1. a base plate; 2. square iron; 3. a support plate; 4. b, plate; 5. a, a plate; 6. a top plate; 7. a front mold core; 8. a rear mold core; 9. a tooth axis; 901. a first screw section; 902. a ring groove; 903. a guide key groove; 904. a second screw section; 10. a mold insert; 11. an ejector plate; 12. a cavity; 13. a nut block; 14. a gear sleeve; 15. rotating the buckle insert; 151. a spindle bolt; 16. an intermediate gear; 17. a bull gear; 18. a rack; 19. positioning blocks; 20. a cylinder support; 21. and an oil cylinder.
Detailed Description
The core of the utility model is to provide a tooth shaft demolding structure of an injection mold, which can simultaneously demold a tooth surface and a buckling groove position, simplify the structure and improve the demolding efficiency.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to the drawings, FIG. 1 is a schematic sectional structural view of a tooth shaft demolding structure for installing the injection mold of the utility model;
FIG. 2 is another schematic structural view in angular section of the discharge structure for the tooth shaft of the injection mold according to the present invention; FIG. 3 is a schematic view of a three-dimensional structure of a tooth shaft demolding structure of the injection mold of the utility model; fig. 4 is a schematic view of the top structure of the dental shaft of the present invention.
In one embodiment, as shown in fig. 1 to 4, between the mold base and the mold core of the injection mold tooth shaft demolding structure of the present invention, the mold core includes a front mold core 7 and a rear mold core 8, and the mold base includes a bottom plate 1, square iron 2, a supporting plate 3, a B plate 4, an a plate 5, a top plate 6, and an ejector plate 11. The utility model discloses injection mold tooth axle demolding structure includes tooth axle 9, mould benevolence mold insert 10, nut piece 13, rotates and detains mold insert 15, drive assembly and drive unit. Mould benevolence mold insert 10 is for half a husband's structure and parcel tooth axle 9 behind the countersunk head bolted connection, and mould benevolence mold insert 10 is embedded into back mould benevolence 8, and the position that exposes on the top of tooth axle 9 sets up to the first screw rod section 901 for the facing shaping, is provided with annular 902 below first screw rod section 901, rotates the inner joint of detaining mold insert 15 in annular 902, rotates to detain mold insert 15 middle part and articulates on mould benevolence mold insert 10 through pivot bolt 151, rotates the mold core of detaining the mold insert 15 outer end as the lock trench. The tooth shaft 9 is provided with a coaxial second screw section 904 below the ring groove 902, and the nut block 13 is in threaded connection with the second screw section 904 and is clamped and fixed in the mold insert 10. The driving unit is arranged on the die carrier and drives the tooth shaft 9 to rotate through the transmission assembly. Specifically, first screw section 901 is a cylindrical or conical screw flight.
Through set up annular 902 on dental axis 9, rotate the inner joint of detaining mold insert 15 and in annular 902, when the demoulding of dental axis 9, downward axial displacement drives and rotates the inner of detaining mold insert 15 downwards, rotates the back drawing of patterns simultaneously of the lock trench core of detaining mold insert 15 outer end of rotating. Namely, one rotation of the tooth shaft 9 drives the formed tooth surface and the buckling slot position to be simultaneously demoulded. The mold insert 10 is of a half structure, so that the mold insert is convenient to mount and dismount and convenient to maintain. The injection mold tooth shaft demolding structure can simultaneously demold the tooth surface and the buckling groove position, simplifies the structure and improves demolding efficiency.
In an embodiment of the present invention, as shown in fig. 3, the transmission assembly includes a gear sleeve 14, a rack 18, and a positioning block 19, the positioning block 19 is mounted on the pallet 3 of the mold frame and slidably guides the rack 18, and the rack 18 is disposed between the pallet 3 and the B plate 4. The rack 18 is in transmission connection with the outer teeth of the gear sleeve 14, the gear sleeve 14 is connected with the tail rod of the tooth shaft 9 through a sliding key structure, and two ends of the gear sleeve 14 are erected on the die carrier through bearings.
Obviously, the transmission assembly can also adopt a chain wheel and chain mode or a synchronous belt and a synchronous belt wheel mode for transmission, and the transmission assembly can be reasonably arranged and can also obtain similar technical effects. All such modifications are intended to fall within the scope of the present invention.
Specifically, as shown in fig. 3, the sliding key structure specifically adopts a spline shaft and spline housing matching mode or a flat key strip and guide key groove 903 matching mode.
Specifically, as shown in fig. 3, the transmission assembly further includes a speed increasing structure including an intermediate gear 16 and a large gear 17 which are engaged with each other. Wherein the big gear 17 is a duplicate gear, the end of the big gear is meshed with the middle gear 16, and the end of the small gear is meshed with the rack 18 for transmission. The rack 18 drives the outer teeth of the gear sleeve 14 via the gearwheel 17 and the intermediate gear 16.
The tooth shaft 9 is driven to rotate in a rack and pinion mode, so that the linear motion of the driving unit is converted into the rotary motion conveniently; the gear sleeve 14 and the tail rod of the tooth shaft 9 which are connected through the sliding key structure can realize axial movement in the rotating process, so as to drive the rotating buckle insert 15 to be released or reset; through the setting of acceleration rate structure is convenient for improve drawing of patterns speed.
In an embodiment of the present invention, as shown in fig. 2, the driving unit specifically employs an air cylinder, an oil cylinder 21 or an electric push rod.
Specifically, as shown in fig. 2, an oil cylinder 21 is mounted on one side of the mold frame through a C-shaped oil cylinder bracket 20, and the top end of a piston rod of the oil cylinder 21 is connected with a rack 18. A travel switch is arranged in a matching way to control the driving travel of the oil cylinder 21.
The oil cylinder 21 is used as a driving unit, other core pulling actions are completed under the assistance of a hydraulic oil cylinder, and the core pulling actions are conveniently integrated on the injection molding machine in a unified mode, so that the demolding actions are coordinated and consistent, and misoperation is avoided. Meanwhile, the action force of the hydraulic cylinder is large, so that the driving tooth shaft 9 can be driven to be demoulded quickly.
The utility model relates to a working principle of a tooth shaft demolding structure of an injection mold, which comprises the following steps: after injection molding, the oil cylinder 21 drives the rack 18 to move linearly, the rack 18 drives the outer teeth of the gear sleeve 14 to rotate through the large gear 17 and the middle gear 16, and further drives the tooth shaft 9 to rotate and move downwards, in the process of downward movement of the tooth shaft 9, the tooth surface forming surface is demoulded through rotary action, the annular groove 902 moves downwards to drive the inner end of the rotary buckle insert 15 to rotate downwards, and the buckling groove position core at the outer end of the rotary buckle insert 15 rotates and then is demoulded, so that demoulding at three positions is completed.
According to the injection mold tooth shaft demolding structure, the annular groove 902 is formed in the tooth shaft 9, the inner end of the rotating buckle insert 15 is clamped in the annular groove 902, when the tooth shaft 9 is demolded, the tooth shaft moves downwards and axially to drive the inner end of the rotating buckle insert 15 to rotate downwards, and the mold core of the buckling groove at the outer end of the rotating buckle insert 15 rotates and then demolds simultaneously. Namely, one rotation of the tooth shaft 9 drives the formed tooth surface and the buckling slot position to be simultaneously demoulded. The mold insert 10 is of a half structure, so that the mold insert is convenient to mount and dismount and convenient to maintain. The injection mold tooth shaft demolding structure can simultaneously demold the tooth surface and the buckling groove position, simplifies the structure and improves demolding efficiency. In addition, the tooth shaft 9 is driven to rotate in a rack and pinion mode, so that the linear motion of the driving unit is converted into the rotary motion conveniently; the gear sleeve 14 and the tail rod of the tooth shaft 9 which are connected through the sliding key structure can realize axial movement in the rotating process, so as to drive the rotating buckle insert 15 to be released or reset; through the setting of acceleration rate structure is convenient for improve drawing of patterns speed. The oil cylinder 21 is used as a driving unit, other core pulling actions are completed under the assistance of a hydraulic oil cylinder, and the core pulling actions are conveniently integrated on the injection molding machine in a unified mode, so that the demolding actions are coordinated and consistent, and misoperation is avoided. Meanwhile, the action force of the hydraulic cylinder is large, so that the driving tooth shaft 9 can be driven to be demoulded quickly.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the scope of the present invention is defined by the claims.
Claims (6)
1. A tooth shaft demolding structure of an injection mold is arranged between a mold frame and a mold core, the mold core comprises a front mold core (7) and a rear mold core (8), it is characterized by comprising a tooth shaft (9), a mold core insert (10), a nut block (13), a rotary buckle insert (15), a transmission assembly and a driving unit, the mould core insert (10) is of a half structure and wraps the tooth shaft (9), the mould core insert (10) is embedded into the rear mould core (8), the exposed part of the top end of the tooth shaft (9) is provided with a first screw section (901) for tooth surface molding, an annular groove (902) is arranged below the first screw section (901), the inner end of the rotary buckle insert (15) is clamped in the annular groove (902), the middle part of the rotary buckling insert (15) is hinged to the die core insert (10) through a rotating shaft bolt (151), and the outer end of the rotary buckling insert (15) is used as a core of a buckling groove position; a second coaxial screw rod section (904) is arranged below the annular groove (902) of the tooth shaft (9), and the nut block (13) is in threaded connection with the second screw rod section (904) and is clamped and fixed in the die core insert (10); the driving unit is arranged on the die carrier and drives the tooth shaft (9) to rotate through the transmission assembly.
2. The injection mold tooth shaft demolding structure according to claim 1, wherein: the transmission assembly comprises a gear sleeve (14), a rack (18) and a positioning block (19), the positioning block (19) is arranged on the die carrier and is guided in a sliding mode to the rack (18), the rack (18) is connected in a transmission mode to the outer teeth of the gear sleeve (14), the gear sleeve (14) is connected with a sliding key structure, the tooth shaft (9) and the tail rod are connected, and two ends of the gear sleeve (14) are erected on the die carrier through bearings.
3. The injection mold tooth shaft demolding structure according to claim 2, wherein: the sliding key structure specifically adopts a spline shaft and spline sleeve matching mode or a flat key and guide key groove (903) matching mode.
4. The injection mold tooth shaft demolding structure according to claim 2, wherein: the transmission assembly further comprises a speed increasing structure, the speed increasing structure comprises an intermediate gear (16) and a large gear (17) which are meshed with each other, and the rack (18) is driven by the large gear (17) and the intermediate gear (16) to form external teeth of the gear sleeve (14).
5. The injection mold tooth shaft demolding structure according to claim 4, wherein: the driving unit specifically adopts an air cylinder, an oil cylinder (21) or an electric push rod, the oil cylinder (21) is installed on one side of the die carrier through a C-shaped oil cylinder support (20), and the top end of a piston rod of the oil cylinder (21) is connected with the rack (18).
6. An injection mold tooth shaft demolding structure as claimed in any one of claims 1 to 5, wherein: the first screw section (901) is a cylindrical screw thread or a conical screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122462720.8U CN215703798U (en) | 2021-10-13 | 2021-10-13 | Injection mold tooth shaft demolding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122462720.8U CN215703798U (en) | 2021-10-13 | 2021-10-13 | Injection mold tooth shaft demolding structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215703798U true CN215703798U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122462720.8U Active CN215703798U (en) | 2021-10-13 | 2021-10-13 | Injection mold tooth shaft demolding structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215703798U (en) |
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2021
- 2021-10-13 CN CN202122462720.8U patent/CN215703798U/en active Active
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