CN216267367U

CN216267367U - Cam type tooth twisting and core withdrawing die

Info

Publication number: CN216267367U
Application number: CN202122992148.6U
Authority: CN
Inventors: 夏美平; 彭重霄; 陈节盛
Original assignee: Xiamen Xinhuite Precision Mould Co ltd
Current assignee: Xiamen Xinhuite Precision Mould Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-04-12
Anticipated expiration: 2031-12-01

Abstract

The utility model relates to a cam-type hank tooth moves back mandrel utensil, it includes mould and lower mould, and both cooperate, the equal shaping of end in opposite directions of going up mould and lower mould has a plurality of die cavities, the lower mould slides and is connected with the side form, wears to be equipped with the mold core in the die cavity, and the one end shaping that the mold core is located the die cavity has the tooth head, the mold core rotates and connects in the side form, the mold core is provided with locating component, locating component includes coaxial fixed connection in the cam of mold core and the joint spare that is used for joint cam to go up the bellying, the bellying shaping of cam is the ratchet, the joint spare is including promoting the spring and the joint piece that is used for the butt ratchet, the joint piece slides and connects in the side form, the both ends difference fixed connection of promotion spring is in side form and joint piece. This application has the effect of the tooth head on the die core is fixed a position when closing the membrane.

Description

Cam type tooth twisting and core withdrawing die

Technical Field

The application relates to the field of injection molds, in particular to a cam type thread tooth core retreating mold.

Background

Injection molding is the production method adopted by many parts today, and an injection mold is the main tool for injection molding of parts. The injection mold generally comprises an upper mold and a lower mold which are matched with each other, and a plurality of cavities are formed in opposite ends of the upper mold and the lower mold.

When the part with holes and the hole wall on which the internal thread needs to be formed is subjected to injection molding, the mold further comprises a side mold connected to the lower mold in a sliding manner, the mold core is arranged in the mold cavity in a penetrating manner, a tooth head is formed at one end, facing the mold cavity, of the mold core, and the mold core is connected to the side mold in a rotating manner. Thus, during injection molding, the part is molded into an internal thread through the tooth heads on the mold core.

However, part of the parts which need to form the internal thread have position requirements on the starting end of the thread, and at the moment, the die core is rotationally connected to the side die, so that the position of the thread head on the die core cannot be positioned, and the starting ends of the internal threads formed on different parts are inconsistent, and the quality of a finished product is affected.

SUMMERY OF THE UTILITY MODEL

In order to fix a position the tooth head on the mold core when closing the membrane, this application provides a cam-type hank tooth moves back core mould.

The application provides a cam-type hank tooth moves back core mould adopts following technical scheme:

the utility model provides a cam-type hank tooth moves back mandrel utensil, includes mould and lower mould, and both cooperate, the equal shaping in the end in opposite directions of going up mould and lower mould has a plurality of die cavities, the lower mould slides and is connected with the side form, wears to be equipped with the mold core in the die cavity, and the one end shaping that the mold core is located the die cavity has the tooth head, the mold core rotates to be connected in the side form, the mold core is provided with locating component, locating component includes coaxial fixed connection in the cam of mold core and the joint spare that is used for joint cam to go up the bellying, the bellying shaping of cam is the ratchet, the joint spare is including promoting the spring and the joint piece that is used for the butt ratchet, the joint piece slides and connects in the side form, the both ends of promotion spring are fixed connection in side form and joint piece respectively.

Through adopting above-mentioned technical scheme, during the use, the joint piece receives the impetus that promotes the spring, has the trend that slides towards the cam, when closing the membrane, rotatory mold core, ratchet portion butt when the mold core goes up the cam when the joint piece, the ratchet receives the restriction of joint piece to restriction cam and mold core continue to rotate, and then are located the position with the tooth head on mold core and the mold core, thereby make in many times shaping part, the internal screw thread initiating terminal homoenergetic is unified to same position on the part, and then improve product quality.

Optionally, the side form is offered and is used for holding the mounting groove of joint spare, the mounting groove deviates from the mold core opening setting, the opening part lid of mounting groove has closed the protection piece, the protection piece passes through the bolt and can dismantle connection in the side form.

Through adopting above-mentioned technical scheme, dismantle the protection piece and can take out joint piece and promotion spring from the mounting groove to be convenient for joint piece and the change or the installation that promote the spring.

Optionally, one side that the mould deviates from the lower mould of going up is provided with the clamping die, the clamping die can be dismantled and connect in the lower mould, the clamping die is connected with and is used for ordering about the ejector pad that the side form slided towards the die cavity, the ejector pad butt deviates from one side of die cavity in the side form, the end face shaping of ejector pad towards side form one side is the inclined plane, and the inclined plane is close to the one side slope at clamping die's one end towards the die cavity place.

Through adopting above-mentioned technical scheme, when closing the membrane, press from both sides the in-process that the tight mould is connected in the lower mould, the side form receives the pushing action on the ejector pad inclined plane, and the side form can slide towards the die cavity to increase the stability of closing membrane back side form, and increase the stability of going up the mould simultaneously.

Optionally, the lower mould is provided with drive assembly, drive assembly includes driving motor, drive gear and coaxial fixed connection in the control gear of mold core, driving motor installs in the lower mould, control gear meshes in drive gear, drive gear rotates to be connected in lower mould and coaxial fixed connection in driving motor's output, drive gear is long banding gear, and extends along the glide direction of side form.

By adopting the technical scheme, when the core needs to be withdrawn, the driving motor is started, the transmission gear is driven to rotate, and then the control gear is driven to rotate, so that the mold core is driven to rotate, the tooth head on the mold core can rotate relative to the internal thread on the part, and the tooth head is gradually separated from the internal thread on the part; meanwhile, the transmission gear is long-strip-shaped, so that the control gear can slide along the transmission gear along with the sliding of the side die in the rotating process of the die core, the die core can slide and rotate simultaneously, and the die core is convenient to withdraw from the cavity.

Optionally, the side form is provided with moves back the core piece, move back the core piece including being used for driving about the side form and keeping away from the moving back core spring that the die cavity slided, move back core spring's both ends and be fixed in lower mould and side form respectively.

Through adopting above-mentioned technical scheme, when rotating the mold core, the side form receives the effect of moving back the core spring for move back the core spring and can pull the side form towards the direction of keeping away from the die cavity, thereby make the tooth head on the mold core more smooth and easy when breaking away from the internal thread of part, and can reduce the internal thread on the part and the internal thread of mold core between the resistance, thereby reduce the impaired possibility of part.

Optionally, move back the core still includes the slide bar, slide bar one end fixed connection is in the side form, the slide bar is worn to establish and is slided and connect in the lower mould, move back the coaxial cover of core spring and locate the slide bar, just move back the both ends of core spring fixed connection respectively in slide bar and lower mould.

Through adopting above-mentioned technical scheme, the slide bar can be to moving back the support of core spring to increase and move back the stability of core spring when compression or extension.

Optionally, the lower die is provided with a control member for controlling the reciprocating sliding of the side die.

By adopting the technical scheme, the control part can further control the sliding of the side die, and when the tooth head on the die core is completely separated from the internal thread of the part during demoulding, the side die can be continuously pulled to be away from the die cavity through the control part to slide, so that the die core is completely separated from the die cavity; and in the film combining process, the side die is controlled to slide by the control part, so that the die core extends into the die cavity.

Optionally, the control sets up to control cylinder, control cylinder's expansion end is connected with the fixture block, the side form has been seted up and has been dodged the groove, dodge the groove and extend along the slip direction of side form, the fixture block card is established and is slided and connect in dodging the inslot.

Through adopting above-mentioned technical scheme, the in-process that the tooth head on the control mold core breaks away from the internal thread on the part, the side form can slide relative lower mould, avoids the setting of groove this moment, can reduce the possibility that takes place relative interference between fixture block and the side form.

In summary, the present application includes at least one of the following beneficial technical effects:

when the mold core is used, the clamping block is pushed by the pushing spring and has a tendency of slipping towards the cam, the mold core is rotated when the film is closed, when the ratchet part of the cam on the mold core abuts against the clamping block, the ratchet is limited by the clamping block, so that the cam and the mold core are limited to continue rotating, the mold core and the tooth heads on the mold core are positioned at the positions, and therefore starting ends of internal threads on parts can be unified at the same position in multiple times of forming of the parts, and the product quality is improved;

the core spring moves back that sets up for when rotating the mold core, the side form receives the effect that moves back the core spring, moves back the core spring and can pull the side form towards the direction of keeping away from the die cavity, thereby makes the tooth head on the mold core more smooth and easy when breaking away from the internal thread of part, and can reduce the internal thread on the part and the internal thread of mold core between the resistance, thereby reduces the impaired possibility of part.

Drawings

FIG. 1 is a schematic illustration of a partial explosion structure of an embodiment of the present application;

FIG. 2 is a schematic view of a lower mold in a partial cross-sectional view according to an embodiment of the present application;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

fig. 4 is an enlarged schematic view of a portion B of fig. 1.

Description of reference numerals: 1. an upper die; 2. a lower die; 3. side mould; 31. a mold core; 32. mounting grooves; 321. a protection block; 4. a positioning assembly; 41. a cam; 411. a ratchet; 42. a clamping piece; 421. a push spring; 422. a clamping block; 5. a drive assembly; 51. a drive motor; 52. a transmission gear; 53. a control gear; 6. clamping the die; 61. a push block; 7. withdrawing the core piece; 71. a core withdrawing spring; 72. a slide bar; 8. controlling the cylinder; 81. a clamping block; 82. avoiding the groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses cam-type hank tooth moves back core mould. Referring to fig. 1, a cam type threading and core-withdrawing die comprises an upper die 1 and a lower die 2, wherein the upper die 1 is detachably connected above the lower die 2 and is matched with the lower die. The opposite ends of the upper die 1 and the lower die 2 are both formed with a plurality of cavities, in this embodiment, two cavities are formed. The lower die 2 is connected with a side die 3 in a sliding mode, a die core 31 penetrates through the die cavity, one end, located in the die cavity, of the die core 31 is formed into a tooth head of an external thread structure, and the die core 31 is connected to the side die 3 in a rotating mode.

Referring to fig. 1, a clamping die 6 is disposed on one side of the upper die 1 away from the lower die 2, and the clamping die 6 is detachably connected to the lower die 2. One side of the clamping die 6 facing the lower die 2 is fixedly connected with a push block 61, the push block 61 is abutted to one side of the side die 3 departing from the cavity, the end face of the push block 61 facing one side of the side die 3 is formed into an inclined plane, and one end of the inclined plane close to the clamping die 6 inclines towards one side where the cavity is located. When the film is combined, the side die 3 is pushed by the upper inclined surface of the push block 61 in the process that the clamping die 6 is connected to the lower die 2, and the side die 3 can slide towards the cavity, so that the stability of the film-combining rear side die 3 is improved.

Referring to fig. 2 and 3, the mold core 31 is provided with a positioning assembly 4, the positioning assembly 4 comprises a cam 41 and a clamping piece 42, the cam 41 is coaxially and fixedly connected to the mold core 31, and a convex part of the cam 41 is formed into a ratchet 411. Two mounting grooves 32 have been seted up to side form 3, and mounting groove 32 is the upper shed setting, and two joint spare 42 one-to-one respectively set up in two mounting grooves 32. The opening of the mounting groove 32 is covered with a protection block 321, and the protection block 321 is detachably connected to the side mold 3 through a plurality of bolts. The clamping member 42 comprises a pushing spring 421 and a clamping block 422, the clamping block 422 is inserted into and slidably connected to the bottom of the mounting groove 32, and the clamping block 422 abuts against the ratchet 411 on the cam 41. The pushing spring 421 is located inside the mounting groove 32, and two ends of the pushing spring 421 abut against the protection block 321 and the clamping block 422 respectively.

When in use, the clamping block 422 is pushed by the pushing spring 421 and tends to slide towards the cam 41. When the film is closed, the mold core 31 is rotated, and when the ratchet 411 of the cam 41 on the mold core 31 abuts against the clamping block 422, the ratchet 411 is limited by the clamping block 422, so that the cam 41 and the mold core 31 are limited to rotate continuously, and the tooth heads on the mold core 31 and the mold core 31 are positioned at the positions. Therefore, in the process of molding parts for many times, the starting ends of the internal threads on the parts can be unified into the same position, and the product quality is improved.

During demoulding, the mould core 31 is rotated in the opposite direction and the side mould 3 is moved to separate the teeth on the mould core 31 from the internal thread on the part. At this moment, when the ratchet 411 on the cam 41 passes through the joint block 422, the curved surface end of the ratchet 411 can jack up the joint block 422, and then the joint block 422 is reset again under the action of the pushing spring 421, so that the possibility that the ratchet 411 is limited by the joint block 422 is reduced, and the core can be smoothly withdrawn during demolding.

Referring to fig. 2 and 3, in order to facilitate control of the core 31 to be withdrawn, the lower mold 2 is provided with a driving assembly 5. The driving assembly 5 comprises a driving motor 51, a transmission gear 52 and a control gear 53 coaxially and fixedly connected to the mold core 31. The driving motor 51 is installed on the lower die 2, the control gear 53 is meshed with the transmission gear 52, the transmission gear 52 is rotatably connected to the lower die 2 and coaxially and fixedly connected to the output end of the driving motor 51, and the transmission gear 52 is a long-strip-shaped gear and extends along the sliding direction of the side die 3.

The side die 3 is provided with a core withdrawing element 7, the core withdrawing element 7 comprises a core withdrawing spring 71 and a sliding rod 72, one end of the sliding rod 72 is fixedly connected to the side die 3, the sliding rod 72 penetrates through and is connected to the lower die 2 in a sliding mode, the core withdrawing spring 71 is coaxially sleeved on the sliding rod 72, and two ends of the core withdrawing spring 71 are fixedly connected to the sliding rod 72 and the lower die 2 respectively.

When core withdrawing is needed, the clamping die 6 is firstly slid towards the direction away from the lower die 2, so that the limit of the pushing block 61 on the side die 3 is released. Then, the driving motor 51 is started to drive the transmission gear 52 to rotate, and then the control gear 53 is driven to rotate, so that the mold core 31 is driven to rotate, the tooth heads on the mold core 31 can rotate relative to the internal threads on the part, and the tooth heads are gradually separated from the internal threads on the part; meanwhile, as the transmission gear 52 is long, in the rotating process of the mold core 31, along with the sliding of the side mold 3, the control gear 53 can slide along the transmission gear 52, so that the mold core 31 can slide and rotate simultaneously, and the mold core 31 is withdrawn from the mold cavity.

When the mold core 31 is rotated, the side mold 3 is under the action of the core withdrawing spring 71, so that the core withdrawing spring 71 can pull the side mold 3 towards the direction away from the cavity, the tooth heads on the mold core 31 are more smooth when being separated from the internal threads of the part, the resistance between the internal threads on the part and the tooth heads on the mold core 31 can be reduced, and the possibility of damage of the internal threads of the part is reduced.

Referring to fig. 4, in order to further control the reciprocating sliding of the side mold 3, the lower mold 2 is provided with a control member, and in the embodiment, the control member is provided as a control cylinder 8, but of course, the control member may also be provided as a hydraulic cylinder. The movable end of the control cylinder 8 is connected with a fixture block 81, the side die 3 is provided with an avoiding groove 82, the avoiding groove 82 extends along the sliding direction of the side die 3, and the fixture block 81 is clamped and connected in the avoiding groove 82 in a sliding manner.

In the process of controlling the tooth head on the mold core 31 to be separated from the internal thread on the part, the side mold 3 can slide relative to the lower mold 2, at the moment, the avoiding groove 82 can reduce the possibility of relative interference between the fixture block 81 and the side mold 3, and when the tooth head on the mold core 31 is completely separated from the internal thread of the part, the side mold 3 is continuously pulled to be separated from the mold cavity to slide through the control cylinder 8, so that the mold core 31 is completely separated from the mold cavity. And, in the film combining process, the sliding of the side die 3 is controlled by the control cylinder 8, so that the die core 31 is extended into the die cavity.

The implementation principle of the cam type thread back-off die in the embodiment of the application is as follows: when the film is closed, the driving motor 51 is started to control the mold core 31 to rotate, the control cylinder 8 is started to control the mold core 31 to slide towards the mold cavity, when the ratchet 411 of the cam 41 on the mold core 31 abuts against the clamping block 422, the ratchet 411 is limited by the clamping block 422, so that the cam 41 and the mold core 31 are limited to continue rotating, and the tooth heads on the mold core 31 and the mold core 31 are positioned at the positions. Therefore, in the process of molding parts for many times, the starting ends of the internal threads on the parts can be unified into the same position, and the product quality is improved.

When core withdrawing is needed, the clamping die 6 is firstly slid towards the direction away from the lower die 2, so that the limit of the pushing block 61 on the side die 3 is released. Then, the driving motor 51 is started, and then the mold core 31 is driven to rotate, so that the tooth heads on the mold core 31 can rotate relative to the internal threads on the part, and therefore the tooth heads are gradually separated from the internal threads on the part, meanwhile, the side mold 3 is under the action of the core withdrawing spring 71, so that the core withdrawing spring 71 can pull the side mold 3 towards the direction far away from the cavity, and therefore the tooth heads on the mold core 31 are more smooth when separated from the internal threads of the part. When the tooth head on the mold core 31 is completely separated from the internal thread of the part, the side mold 3 is continuously pulled to slide away from the mold cavity through the control cylinder 8, so that the mold core 31 is completely separated from the mold cavity.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a cam-type hank tooth moves back core mould, includes mould (1) and lower mould (2), and both cooperate, the end in opposite directions of going up mould (1) and lower mould (2) all takes shape to have a plurality of die cavities, lower mould (2) slide and are connected with side form (3), wear to be equipped with in the die cavity mold core (31), and the one end shaping that mold core (31) are located the die cavity has the tooth head, mold core (31) rotate to be connected in side form (3), its characterized in that: mold core (31) are provided with locating component (4), locating component (4) include cam (41) of coaxial fixed connection in mold core (31) and joint spare (42) that are used for joint cam (41) to go up the bellying, the bellying shaping of cam (41) is ratchet (411), joint spare (42) are including promoting spring (421) and joint piece (422) that are used for butt ratchet (411), joint piece (422) slide and connect in side form (3), the both ends difference fixed connection in side form (3) and joint piece (422) of promotion spring (421).

2. The cam type threading and core-removing die as claimed in claim 1, wherein: side form (3) offer be used for holding mounting groove (32) of joint spare (42), mounting groove (32) deviate from mold core (31) opening setting, the opening part lid of mounting groove (32) has protection piece (321), protection piece (321) can be dismantled through the bolt and connect in side form (3).

3. The cam type threading and core-removing die as claimed in claim 1, wherein: go up one side that mould (1) deviates from lower mould (2) and be provided with clamping die (6), clamping die (6) can be dismantled and connect in lower mould (2), clamping die (6) are connected with ejector pad (61) that is used for ordering about side form (3) and slides towards the die cavity, ejector pad (61) butt deviates from one side of die cavity in side form (3), ejector pad (61) are the inclined plane towards the terminal surface shaping of side form (3) one side, and the inclined plane is close to one side slope at clamping die (6) one end towards the die cavity place.

4. The cam type threading and core-removing die as claimed in claim 1, wherein: lower mould (2) are provided with drive assembly (5), drive assembly (5) include driving motor (51), drive gear (52) and coaxial fixed connection in control gear (53) of mold core (31), driving motor (51) are installed in lower mould (2), control gear (53) mesh in drive gear (52), drive gear (52) rotate to be connected in the output of lower mould (2) and coaxial fixed connection in driving motor (51), drive gear (52) are rectangular form gear, and extend along the glide direction of side form (3).

5. The cam type threading and core-removing die as claimed in claim 4, wherein: the side form (3) are provided with and move back core piece (7), move back core piece (7) including being used for driving side form (3) and keeping away from moving back core spring (71) that the die cavity slided, move back the both ends of core spring (71) and be fixed in lower mould (2) and side form (3) respectively.

6. The cam type threading and core-removing die as claimed in claim 5, wherein: move back core (7) and still include slide bar (72), slide bar (72) one end fixed connection in side form (3), slide bar (72) are worn to establish and are slided and connect in lower mould (2), move back core spring (71) coaxial cover and locate slide bar (72), just move back the both ends of core spring (71) fixed connection respectively in slide bar (72) and lower mould (2).

7. The cam type threading and core-removing die as claimed in claim 6, wherein: and the lower die (2) is provided with a control piece for controlling the reciprocating sliding of the side die (3).

8. The cam-type threading and core-removing die as claimed in claim 7, wherein: control sets up to control cylinder (8), the expansion end of control cylinder (8) is connected with fixture block (81), side form (3) have been seted up and have been dodged groove (82), dodge groove (82) and extend along the slip direction of side form (3), fixture block (81) card is established and is slided and connect in dodging groove (82).