CN219325431U

CN219325431U - Tooth twisting die

Info

Publication number: CN219325431U
Application number: CN202320280536.8U
Authority: CN
Inventors: 黄必源
Original assignee: Xiamen Yonghangsheng Mould Manufacturing Co ltd
Current assignee: Xiamen Yonghangsheng Mould Manufacturing Co ltd
Priority date: 2023-02-22
Filing date: 2023-02-22
Publication date: 2023-07-11
Anticipated expiration: 2033-02-22

Abstract

The utility model discloses a tooth twisting die which comprises a fixed die, a movable die and at least one group of tooth twisting components, wherein each tooth twisting component comprises a driving piece, a gear set, a mandrel, a sliding block, a support, a pull rod and a locking block, the driving piece is arranged on the movable die, the gear set comprises a driving wheel and a driven wheel, the driving wheel is connected with the driving piece, the driven wheel is connected with the sliding block, one end of the mandrel is connected with the driven wheel, the other end of the mandrel is provided with a screw tooth and extends into a die cavity, the inner end of the pull rod is connected with the sliding block, the outer end of the pull rod movably penetrates through the support and extends out of the support, a spring is sleeved on the part of the pull rod extending out of the support, the outer end of the sliding block is provided with a reset inclined surface, and the locking block is correspondingly arranged with the reset inclined surface. The die is simple in structure, small in size, reasonable and compact in design, high in core pulling efficiency and particularly suitable for small-size products with thin threads and small screw pitches, and an oil pressure motor drives a mandrel to rotate, and core pulling is assisted by a sliding block, a pull rod and a spring.

Description

Tooth twisting die

Technical Field

The utility model relates to the technical field of dies, in particular to a tooth twisting die.

Background

As shown in fig. 1, the pressure relief valve is provided with an inner tooth interface provided with inner teeth and an outer tooth interface provided with outer teeth, wherein the diameter of the outer tooth interface is 10mm, the diameter of the inner tooth interface is only 5mm, the teeth are fine and the screw pitch is small (28 teeth/inch of the outer tooth interface and 48 teeth/inch of the inner tooth interface), the interface has a sealing requirement, the joint is not allowed to have break-off and dislocation, and the integral teeth are needed to be twisted for forming. In view of this, the present inventors have discovered a thread die for forming such fine, low pitch products.

Disclosure of Invention

The utility model aims to provide a tooth twisting die which is compact and small in structure, high in core pulling efficiency and particularly suitable for fine threads and small-pitch products.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a hank tooth mould, includes cover half, movable mould and at least a set of hank tooth subassembly, hank tooth subassembly is including locating driving piece, gear train, dabber, slider, support, pull rod on the movable mould and locating the latch segment on the cover half, the gear train includes intermeshing's action wheel and follows the driving wheel, the action wheel is connected with the driving piece, follow the driving wheel and be connected with the slider, dabber one end is connected with follow the driving wheel, and the other end is equipped with the screw thread and stretches into the mould die cavity, the pull rod inboard end is connected with the slider, and the outside end activity runs through the support and stretches out the support, and the part cover that the pull rod stretches out the support is equipped with the spring, the outside end of slider has the inclined that resets of outside downward sloping, the latch segment corresponds the setting with the inclined that resets.

Further, the projection length of the reset inclined plane in the core pulling direction of the mandrel is larger than the core pulling distance of the mandrel.

Further, the tooth width of the driving wheel is larger than that of the driven wheel, and the tooth width of the driving wheel is larger than the core pulling distance of the mandrel.

Further, the driven wheel is arranged inside the sliding block.

Further, the locking block is provided with a driving inclined plane matched with the reset inclined plane, and the bottom end of the locking block is provided with a yielding notch which is correspondingly arranged with the pull rod.

Further, the driving piece is an oil pressure motor, a main body of the oil pressure motor is arranged on the bracket, and an output shaft of the oil pressure motor is connected with the driving wheel.

Further, the number of the driven wheels and the number of the mandrels are two, the driven wheels are meshed with the driving wheels, and the two mandrels are connected with the two driven wheels respectively.

After the technical scheme is adopted, compared with the prior art, the utility model has the following advantages:

the die is simple in structure, small in size, reasonable and compact in design, high in core pulling efficiency and particularly suitable for small-size products with thin threads and small screw pitches, and an oil pressure motor drives a mandrel to rotate, and core pulling is assisted by a sliding block, a pull rod and a spring.

Drawings

FIG. 1 is a schematic diagram of a pressure relief valve according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a tooth mold according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the mold with the mold removed;

FIG. 4 is a schematic view of a hinge assembly during mold closing according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram illustrating the cooperation of two sets of teeth according to the present utility model.

Reference numerals illustrate:

10-a pressure relief valve,

11-inner tooth interface, 12-outer tooth interface, 13-connection interface,

20-a fixed die, wherein the fixed die is provided with a plurality of fixed die holes,

30-a movable mould, wherein the movable mould is provided with a plurality of grooves,

a 40-the tooth assembly is formed,

41-the driving member is arranged to be moved,

42-gear set, 421-driving wheel, 422-driven wheel,

a 43-spindle, which is provided with a first pin,

44-slider, 441-reset ramp, 442-ledge,

45-a bracket, wherein the bracket is provided with a plurality of holes,

46-tie-rods, 461-springs,

47-locking block, 471-driving inclined plane, 472-yielding gap,

50-a forming assembly, wherein the forming assembly,

51-oblique guide posts.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be noted that, in the present utility model, terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element of the present utility model must have a specific orientation, and thus should not be construed as limiting the present utility model.

Examples

With reference to fig. 1 to 5, the utility model discloses a tooth mold which is relatively suitable for small-size, fine-pitch tooth products, and corresponds to a mold with a core-pulling rotation number of a mandrel 43 and a small core-pulling distance.

Referring to fig. 2 to 5, a tooth mold comprises a fixed mold 20, a movable mold 30 and at least one group of tooth assemblies 40, wherein each tooth assembly 40 comprises a driving member 41, a gear set 42, a mandrel 43, a sliding block 44, a support 45, a pull rod 46 and a locking block 47 arranged on the fixed mold 20, the gear set 42 comprises a driving wheel 421 and a driven wheel 422 which are meshed with each other, the driving wheel 421 is connected with the driving member 41, the driven wheel 422 is connected with the sliding block 44, one end of the mandrel 43 is connected with the driven wheel 422, the other end of the mandrel is provided with a screw tooth and extends into a mold cavity, the inner end of the pull rod 46 is connected with the sliding block 44, the outer end of the pull rod 46 movably penetrates through the support 45 and extends out of the support 45, a spring 461 is sleeved on a part of the pull rod 46 extending out of the support 45, the outer end of the sliding block 44 is provided with a reset inclined surface 441 which is inclined downwards outwards, and the locking block 47 is correspondingly arranged with the reset inclined surface 441.

The driving wheel 421 is connected to the driving member 41, the driving member 41 drives the driving wheel 421 to rotate, and further drives the driven wheel 422 meshed with the driving wheel 421 to rotate therewith, an outer side end (an inner side near the mold cavity, an outer side far away from the mold cavity) of the mandrel 43 is connected to the driven wheel 422, the mandrel 43 rotates with the driven wheel 422, and an inner side end of the mandrel 43 is provided with threads and extends into the mold cavity for forming product threads (inner threads or outer threads).

The driven wheel 422 is connected with the slide block 44, the slide block 44 slides along with the driven wheel 422, the outer side surface of the slide block 44 is provided with a reset inclined plane 441, the locking block 47 is arranged on the fixed die 20 and corresponds to the reset inclined plane 441, the locking block 47 moves up and down along with the opening and closing of the fixed die 20, and when the locking block 47 moves down, the locking block 47 presses against the reset inclined plane 441 to drive the slide block 44 to move inwards, and the driven wheel 422 and the mandrel 43 move inwards. The inner side end of the pull rod 46 is connected with the slide block 44, the part of the outer side end extending out of the support 45 is sleeved with the spring 461, when the slide block 44 moves inwards, the pull rod 46 moves along with the spring 461, the spring 461 is compressed, when the die opening locking block 47 moves upwards, the spring 461 resets, and then the pull rod 46, the slide block 44, the driven wheel 422 and the mandrel 43 are driven to move outwards (die stripping), at this time, the mandrel 43 is in a rotating state under the action of the driving piece 41 and the gear set 42, and finally the mandrel 43 performs core pulling outwards to complete die stripping. The pull rod 46 and the spring 461 play a role in assisting demolding, so that the efficiency is higher.

Wherein, the two sides of the sliding block 44 are extended to be provided with a convex edge portion 442, the movable mold 30 is provided with a chute corresponding to the convex edge portion 442, when the sliding block slides, the convex edge portion 442 slides in the chute, the chute plays a role of limiting and guiding, and the sliding block 44 is ensured to slide stably and has accurate position.

The support 45 is an n-shaped structure formed by assembling three plate pieces, is arranged on the side face of the die, and the opening end faces the inner side of the die. The outer end of the pull rod 46 is provided with a nut, and one end of the spring 461 abuts against the outer end of the bracket 45, and the other end abuts against the nut. When the pull rod 46 moves inward along with the slide block 44, the spring 461 is compressed, and when the die is opened and the core is pulled, the spring 461 is reset to drive the pull rod 46 to pull the slide block 44 to move outward. Wherein, support 45 is the inboard just open end orientation mould of Pi, encloses between mould side and the support 45 and closes and form certain space, also can slider 44 provide the motion space for the structure of mould is compacter, small and exquisite.

The number of the teeth assemblies 40 is determined according to the actual requirement, a group of teeth assemblies 40 are correspondingly formed into a screw tooth of a port, the screw tooth can be an inner tooth or an outer tooth, the difference between the inner tooth and the outer tooth is mainly that the shape of the mandrel 43 is that one end of the mandrel 43 is required to be designed according to the shape of a product to form the screw tooth of the product.

The locking block 47 has a driving inclined plane 471 adapted to the reset inclined plane 441, and a relief notch 472 corresponding to the pull rod 46 is provided at the bottom end of the locking block 47. The driving inclined plane 471 is located at the inner side end of the locking block 47 (the end of the locking block 47 close to the cavity), the driving inclined plane 471 of the locking block 47 is matched with the reset inclined plane 441 of the sliding block 44, and when the locking block 47 moves downwards, the driving inclined plane 471 slides inwards corresponding to the driving sliding block 44 to drive the mandrel 43 to reset.

Wherein, for the compact structure of the whole mold, the driven wheel 422 is directly arranged inside the slide block 44, the inner side end of the pull rod 46 is fixedly connected with the outer side end of the slide block 44, the locking block 47 is positioned at the outer side of the slide block 44, and a yielding gap 472 is arranged on the locking block 47 corresponding to the pull rod 46, and when the locking block 47 moves up and down, the locking block 47 moves up and down relative to the pull rod 46 through the yielding gap 472.

The projection length of the reset inclined plane 441 in the core pulling direction of the mandrel 43 is longer than the core pulling distance of the mandrel 43. The projection length of the reset inclined plane 441 in the core pulling direction of the mandrel 43 is the distance that the locking block 47 can drive the sliding block 44 to reset and slide, and the distance is larger than the core pulling length of the mandrel 43, so that when the sliding block 44 slides to drive the mandrel 43 to reset, the mandrel 43 can be ensured to reset in place.

The tooth width of the driving wheel 421 is larger than the tooth width of the driven wheel 422, and the tooth width of the driving wheel 421 is larger than the core pulling distance of the mandrel 43. The tooth width refers to the dimension of the gear teeth along the axial direction of the gear, when the core pulling demolding or mold closing is reset, the driven wheel 422 slides along the driving wheel 421 along with the sliding block 44, the tooth width of the driving wheel 421 is larger than that of the driven wheel 422, the tooth width of the driving wheel 421 is larger than the core pulling distance of the mandrel 43, when the driven wheel 422 slides relatively to the non-driving wheel 421, the driven wheel 422 is ensured not to be separated from the driving wheel 421, and the two wheels are always meshed.

The driving member 41 is a hydraulic motor, and the main body of the hydraulic motor is mounted on the bracket 45, and an output shaft of the hydraulic motor is connected to the driving wheel 421. The main body of the night oil cylinder is arranged on the bracket 45 and is positioned below the pull rod 46, and an output shaft of the night oil cylinder extends into the die from the side surface of the die and is connected with the driving wheel 421 to drive the driving wheel 421 to rotate.

As shown in fig. 5, the number of the driven wheels 422 and the number of the mandrels 43 are two, the driven wheels 422 are meshed with the driving wheel 421, and the two mandrels 43 are respectively connected with the two driven wheels 422. In this case, the two sets of teeth assemblies 40 are shared by other components except the driven wheel 422 and the mandrel 43, which are independent, so that two screw interfaces can be formed correspondingly, thereby effectively improving the efficiency, and the die structure is more compact and small, which is of course designed according to the allowable condition of the actual situation.

In this embodiment, as shown in fig. 1 to 5, a pressure relief valve 10 is formed by using the tooth mold according to the present application, and as shown in fig. 1, the pressure relief valve 10 has three ports, that is, an inner tooth interface 11 with inner teeth, an outer tooth interface 12 with outer teeth, and a connection interface 13 without teeth, where the diameter of the outer tooth interface 12 is 10mm, the tooth arrangement density is 28 teeth/inch, and the diameter of the inner tooth interface 11 is 5mm, the tooth arrangement density is 48 teeth/inch, and the outer tooth interface 12 and the inner tooth interface 11 are both fine and have a small pitch, and are formed by the tooth assembly 40.

The pressure relief valve 10 is formed in a mold comprising two mold cavities, which can simultaneously form two products. One set of opposite sides of the mold are respectively provided with a set of hinge assemblies 40, and the set of hinge assemblies 40 form the inner tooth interface 11 of the pressure relief valve 10. Two sets of tooth dies are arranged on one of the other set of opposite sides of the die, two outer tooth interfaces 12 of the two pressure relief valves 10 are respectively formed, the two sets of tooth assemblies 40 are respectively independent except for driven wheels 422 and mandrels, and components (driving parts 41, driving wheels 421, sliding blocks, locking blocks and pull rods 46) in the other tooth assemblies 40 are shared, so that the die is compact in structure.

The side of the mold opposite to the molding outer tooth interface 12 is provided with a molding assembly 50 for molding the two connecting interfaces 13, the molding assembly 50 comprises a sliding block and a locking block, the matching of the sliding block and the locking block is the same as that of the tooth assembly 40, and the inner side end of the sliding block is connected with a mandrel for molding the connecting interfaces 13. The slide block is provided with an inclined hole, the fixed die 20 is provided with an inclined guide pillar 51 matched with the inclined hole, and the inclined guide pillar 51 is matched with the inclined hole, so that in the die opening process, the slide block is driven to slide outwards to finish the die stripping, and in the die closing process, the slide block is driven to slide inwards to reset. A modular assembly 50 is provided with two mandrels for simultaneously forming the connection interfaces 13 of two products, and the mould is compact and small.

Other structures in the mold, such as: sprue bushings, etc. are well known in the art and will not be described in detail herein. The two pressure relief valves 10 formed by the mould have two inner teeth interfaces 11 arranged opposite to each other, two outer teeth interfaces 12 arranged in parallel on the same side and two connecting interfaces 13 arranged in parallel on opposite sides of the outer teeth interfaces 12 when in the mould cavity.

The working process comprises the following steps: when the mold is closed, the fixed mold 20 drives the locking block to move downwards, the locking block drives the sliding block to slide towards the inner side of the mold through the cooperation of the driving inclined plane 471 and the reset inclined plane 441, and then drives the mandrel to reset towards the mold cavity, and the pull rod 46 moves along with the sliding block to compress the spring 461. When the die is opened, the driving piece 41 drives the driving wheel 421 to rotate, then drives the driven wheel 422 and the mandrel to rotate and loose core, meanwhile, the fixed die 20 drives the locking block to move upwards, the spring 461 drives the pull rod 46 to reset towards the outer side, then drives the sliding block and the mandrel to loose core towards the outer side, and finally the mandrel is demoulded to finish loose core.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. The utility model provides a hank tooth mould which characterized in that: the die comprises a fixed die, a movable die and at least one group of twisting tooth assembly, wherein the twisting tooth assembly comprises a driving piece, a gear set, a mandrel, a sliding block, a support, a pull rod and a locking block arranged on the fixed die, the driving piece is connected with the gear set, the driving wheel is meshed with the driving wheel, the driven wheel is connected with the sliding block, one end of the mandrel is connected with the driven wheel, the other end of the mandrel is provided with a screw tooth and extends into a die cavity, the inner side end of the pull rod is connected with the sliding block, the outer side end of the pull rod movably penetrates through the support and extends out of the support, a spring is sleeved on the part of the pull rod extending out of the support, the outer side end of the sliding block is provided with a reset inclined surface inclined downwards outwards, and the locking block is correspondingly arranged with the reset inclined surface.

2. The dental reaming die of claim 1, wherein: the projection length of the reset inclined plane in the core pulling direction of the mandrel is larger than the core pulling distance of the mandrel.

3. The dental reaming die of claim 1, wherein: the tooth width of the driving wheel is larger than that of the driven wheel, and the tooth width of the driving wheel is larger than the core pulling distance of the mandrel.

4. The dental reaming die of claim 1, wherein: the driven wheel is arranged in the sliding block.

5. The dental reaming die of claim 1, wherein: the locking block is provided with a driving inclined plane matched with the reset inclined plane, and the bottom end of the locking block is provided with a yielding notch which is correspondingly arranged with the pull rod.

6. The dental reaming die of claim 1, wherein: the driving piece is an oil pressure motor, the main body of the oil pressure motor is arranged on the bracket, and the output shaft of the oil pressure motor is connected with the driving wheel.

7. The dental reaming die of claim 1, wherein: the number of the driven wheels and the number of the mandrels are two, the driven wheels are meshed with the driving wheel, and the two mandrels are connected with the two driven wheels respectively.