CN114683489A

CN114683489A - Pipe bending die

Info

Publication number: CN114683489A
Application number: CN202210359898.6A
Authority: CN
Inventors: 成亚飞; 张敬付
Original assignee: Dongguan Modebao Intelligent Technology Co ltd
Current assignee: Dongguan Modebao Intelligent Technology Co ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-07-01

Abstract

The invention provides a pipe bending die which comprises a die body, an insert assembly, a guide rod structure and a slide device, wherein the insert assembly is arranged on the die body; the mould body is provided with a bent pipe cavity and a straight pipe cavity which are communicated, and the straight pipe cavity is communicated with the opening of the bent pipe cavity; the insert assembly and the die body are movably arranged relatively, and the insert assembly is used for being accommodated in the bent pipe cavity; the guide rod structure is movably connected with the insert assembly, and at least part of the guide rod structure is accommodated in the straight pipe cavity and used for guiding the insert assembly to the bent pipe cavity when in a guiding position; the slide device comprises a main slide and an auxiliary slide which are movably arranged relatively, the main slide is arranged on one side of the auxiliary slide facing the die body and is used for driving the insert assembly to move, and the auxiliary slide is used for driving the guide rod structure to move. In the bending die of this embodiment, through the cooperation that sets up guide arm structure and mold insert subassembly, can form the product cavity of moulding plastics that has straight tube and return bend integrated configuration in a process, machining efficiency is high, and processingquality is good, and it is convenient to use.

Description

Pipe bending die

Technical Field

The invention relates to the technical field of dies, in particular to a pipe bending die.

Background

In the existing injection molding process, the following process is generally adopted for processing a product with a combined structure of a bent pipe and a straight pipe: the other is a process of processing and molding, wherein a product is subjected to full-straight pipe injection molding firstly, and then the injection molded product is heated to form a bent pipe structure. The other is a process of combining after independent processing, firstly, the bent pipe and the straight pipe are respectively molded by injection, and then the straight pipe and the bent pipe are combined in a hot melting mode; the process also needs two working procedures, the processing efficiency is low, the hot melting process cannot ensure the product strength, and the processing quality is not good.

Therefore, how to improve the processing efficiency and the processing quality of the combined product of the bent pipe and the straight pipe is an important issue to be solved urgently in the industry at present.

Disclosure of Invention

The invention provides a pipe bending die which is used for solving the problems of low processing efficiency and poor processing quality of a product with a combined structure of a bent pipe and a straight pipe.

The invention provides a pipe bending die, which comprises:

the die body is provided with a bent tube cavity and a straight tube cavity which are communicated, and the straight tube cavity is communicated with an opening of the bent tube cavity;

the insert assembly is movably arranged relative to the die body and is used for being contained in the bent pipe cavity;

the guide rod structure is movably connected to the insert assembly, and at least part of the guide rod structure is accommodated in the straight pipe cavity and used for guiding the insert assembly to the bent pipe cavity when in a guiding position; and

the slide device comprises a main slide and an auxiliary slide which are movably arranged relatively, the main slide is arranged on one side of the auxiliary slide facing the die body and is used for driving the insert assembly to move, and the auxiliary slide is used for driving the guide rod structure to move.

According to an embodiment of the present invention, the slide device further includes a fastening assembly, the fastening assembly includes a fastening machine and a fastening member, the fastening machine is movably connected to the secondary slide, the fastening member is disposed on the primary slide, and when the guide rod structure moves toward the guide position, the fastening machine is in clamping fit with the fastening member; after the guide bar structure is moved to the guide position, the sear is disconnected from the fastener.

According to an embodiment of the present invention, the slide device further includes a driving element, the driving element is disposed in the auxiliary slide and connected to the main slide, and the driving element is configured to drive the main slide to move toward the mold body and to drive the fastening machine to disconnect from the fastening piece.

According to one embodiment of the invention, the slide device further comprises a sleeve, the sleeve is embedded in the main slide, and the guide rod structure is arranged in the sleeve in a penetrating manner and is in sliding fit with the sleeve.

According to an embodiment of the invention, the pipe bending mold further comprises a guide rail structure, and the main slide and the auxiliary slide are respectively in sliding fit with the guide rail structure; and when the guide position is reached, the auxiliary row position is abutted against the guide rail structure.

According to one embodiment of the present invention, the guide rail structure includes a main guide rail and a sub guide rail, the main guide rail is connected to the sub guide rail, the main row position is in sliding fit with the main guide rail, the sub row position is in sliding fit with the sub guide rail, and in the guiding position, the sub row position abuts against one side of the main guide rail facing the sub guide rail; and the auxiliary guide rail is provided with an avoiding groove, and the button machine is accommodated in the avoiding groove at the guide position.

According to one embodiment of the invention, one side of the auxiliary guide rail, which faces the auxiliary slide way, is provided with a mounting groove, and the guide rail structure further comprises a limiting component which is embedded in the mounting groove; and when the guide position is adopted, the limiting component is clamped on the auxiliary slide.

According to one embodiment of the invention, the limiting assembly comprises a limiting piece and a limiting shell, the limiting shell is embedded in the mounting groove, a mounting cavity is formed in the limiting shell, the limiting piece is movably accommodated in the mounting cavity, and the limiting piece is used for being in clamping fit with the auxiliary slide.

According to an embodiment of the present invention, the limiting assembly further includes a resetting member, the resetting member is respectively connected to the limiting member and the limiting housing, and the resetting member is configured to drive the limiting member to move toward the secondary slide.

According to one embodiment of the invention, the bending mould further comprises a movable mould core movably arranged relative to the mould body; the mould body comprises at least two straight pipe cavities, and the two straight pipe cavities are respectively communicated with two opposite ends of the bent pipe cavity; the insert assembly is used for being contained in one straight tube cavity, and the movable mold core is used for being contained in the other straight tube cavity.

The embodiment of the invention has the following beneficial effects:

when the bending die of the embodiment is used, the insert assembly is driven to move towards the die body through the slide device and the guide rod structure, after the slide device moves to the guide position, the slide device is separated from the auxiliary slide through the main slide, so that the insert assembly is driven to move by the main slide, and the insert assembly can move towards the bending cavity under the guide effect of the guide rod structure, thereby forming an injection molding cavity between the insert assembly and the inner wall of the bending cavity, and forming a product with a straight pipe and a bent pipe combined structure in the straight pipe cavity and the bent pipe cavity through injection molding.

In the bending die of this embodiment, through the cooperation that sets up guide arm structure and mold insert subassembly, can form the product cavity of moulding plastics that has straight tube and return bend integrated configuration in a process, machining efficiency is high, and processingquality is good, and it is convenient to use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Wherein:

FIG. 1 is a perspective view of a bending mold in an embodiment of the present invention;

FIG. 2 is a perspective view of a bending die in a guiding position in accordance with an embodiment of the present invention;

FIG. 3 is an exploded view of a bending die in an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a bending die in an embodiment of the invention;

FIG. 5 is a schematic cross-sectional view of a bending die in a pilot position in accordance with an embodiment of the present invention;

figure 6 is a perspective view of an insert unit in an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of an insert unit in an embodiment of the invention;

FIG. 8 is a schematic view showing the structure of a guide bar in the embodiment of the present invention;

FIG. 9 is a schematic sectional view of a partial structure of a bending mold according to an embodiment of the present invention;

reference numerals:

10. a pipe bending die;

100. a mold body; 110. bending the tube cavity; 120. a straight lumen; 130. a glue inlet cavity; 131. a glue inlet port;

200. a line bit device; 210. a main column bit; 211. a movable hole; 220. a secondary row bit; 221. a limiting groove; 222. buckling grooves; 223. accommodating grooves; 224. a through hole; 230. a fastening assembly; 231. buckling machine; 232. a fastener; 240. a drive member; 250. a sleeve;

300. a guide bar structure; 310. a guide bar; 311. an arc-shaped section; 3111. a guide fillet; 312. a connecting section; 313. a guide groove; 320. a guide rod seat;

400. an insert assembly; 410. an insert unit; 411. connecting the insert; 4111. a molding section; 41111. a guide hole; 41112. a butt joint groove; 41113. positioning a groove; 4112. a docking portion; 41121. connecting holes; 4113. a movable cavity; 41131. a movable groove; 412. a connecting member; 4121. a connector body; 4122. a connecting shaft portion; 413. a connecting pin; 414. a magnetic member; 420. an insert seat;

500. a guide rail structure; 510. a main guide rail; 520. a secondary guide rail; 521. an avoidance groove; 522. mounting grooves; 523. positioning holes; 530. a limiting component; 531. a limiting member; 532. a limiting shell; 5321. a mounting cavity; 533. a fastener; 534. a reset member;

20. producing a product; 201. bending the pipe section; 202. a straight pipe section; 203. enter gluey portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.

Referring to fig. 1 and 2, an embodiment of the present invention provides a bending mold 10, which includes a mold body 100, a slide device 200, a guide rod structure 300, and an insert assembly 400; the mold body 100 is provided with an elbow pipe cavity 110 and a straight pipe cavity 120 which are communicated, and the straight pipe cavity 120 is communicated with an opening of the elbow pipe cavity 110; the insert assembly 400 is movably arranged relative to the mold body 100, and the insert assembly 400 is configured to be accommodated in the curved cavity 110; the guide-bar structure 300 is movably connected to the insert assembly 400, and in the guiding position, the guide-bar structure 300 is at least partially received within the straight-tube cavity 120 and is used to guide the insert assembly 400 into the elbow cavity 110; the slide device 200 includes a main slide 210 and an auxiliary slide 220, which are movably disposed relative to each other, the main slide 210 is disposed on one side of the auxiliary slide 220 facing the mold body 100, the main slide 210 is used for driving the insert assembly 400 to move, and the auxiliary slide 220 is used for driving the guide rod structure 300 to move.

When the bending mold 10 of the present embodiment is used, the slide device 200 drives the insert assembly 400 and the guide rod structure 300 to move toward the mold body 100, and after the slide device 200 moves to the guide position, the main slide 210 is separated from the auxiliary slide 220, so that the main slide 210 drives the insert assembly 400 to move and can move toward the bending cavity 110 under the guide effect of the guide rod structure 300, thereby forming an injection molding cavity between the insert assembly 400 and the inner wall of the bending cavity 110, and forming a product 20 having a straight pipe and bent pipe combined structure in the straight pipe cavity 120 and the bending cavity 110 by injection molding.

In the pipe bending mold 10 of the embodiment, the guide rod structure 300 and the insert assembly 400 are matched, so that the injection molding cavity of the product 20 with the straight pipe and bent pipe combined structure can be formed in one process, the processing efficiency is high, the processing quality is good, and the use is convenient and fast.

It should be noted that, referring to fig. 2, in the present application, the product 20 includes an elbow section 201, a straight pipe section 202, and a glue inlet portion 203, where the straight pipe section 202 is connected to an end of the elbow section 201, and the glue inlet portion 203 may correspond to the elbow section 201 and/or the straight pipe section 202; the insert assembly 400 and the inner wall of the elbow cavity 110 form a cavity for injection molding the elbow section 201, and the straight section 202 corresponds to the straight cavity 120.

Further, referring to fig. 1 and 2, the slide device 200 further includes a fastening assembly 230, the fastening assembly 230 includes a fastening machine 231 and a fastening member 232, the fastening machine 231 is movably connected to the secondary slide 220, the fastening member 232 is disposed on the primary slide 210, and when the guide bar structure 300 moves toward the guiding position, the fastening machine 231 is in snap fit with the fastening member 232; after the guide bar structure 300 is moved to the guide position, the sear 231 is disconnected from the latch 232.

With the bending mold 10 of the present embodiment, referring to fig. 1, in the initial position, the main slide 210 and the sub slide 220 are fixedly connected and move synchronously via the fastening assembly 230, after the sub slide 220 moves to the guiding position, the fastening assembly 230 releases the main slide 210 and the sub slide 220, the sub slide 220 is fixed relative to the guiding rod structure 300 and the mold body 100, and the main slide 210 can drive the insert assembly 400 to move along the guiding rod structure 300 to the bending cavity 110.

Specifically, referring to fig. 2, the auxiliary column 220 has a fastening slot 222, the auxiliary column 220 further has an accommodating slot 223, when the fastening machine 231 is connected to the fastening piece 232, the fastening piece 232 is accommodated in the fastening slot 222, and the fastening machine 231 is movably accommodated in the accommodating slot 223. With this arrangement, a more compact structure can be provided between the fastening component 230 and the main column 210 and the sub column 220, so as to reduce the space occupied by the column device 200.

Specifically, referring to fig. 1 and 2, the slide device 200 further includes a driving member 240, the driving member 240 is disposed in the sub-slide 220 and connected to the main slide 210, and the driving member is configured to drive the main slide 210 to move toward the mold body 100 and to drive the locking mechanism 231 to be disconnected from the locking member 232.

In a preferred embodiment, the driving member 240 may be a driving cylinder, before the secondary slide 220 moves to the guiding position, the driving member 240 may drive the primary slide 210 and the secondary slide 220 to move together by the action of the fastening assembly 230 until the fastening machine 231 and the fastening member 232 are released, the secondary slide 220 is fixed relative to the mold body 100, and the driving member 240 continues to drive the primary slide 210 to move so as to drive the insert assembly 400 to move along the guide rod structure 300 and move into the bending pipe cavity 110 under the guiding action of the guide rod structure 300; the reverse movement of the slide device 200 is opposite to the forward movement, and will not be described herein.

Referring to fig. 3 and 4, in the present embodiment, the auxiliary row 220 is provided with a through hole 224, and the driving member 240 is disposed in the through hole 224 and connected to the main row 210.

With this arrangement, the slide device 200 can have a compact structure and occupy a small space.

Further, referring to fig. 4, the slide device 200 further includes a sleeve 250, the sleeve 250 is embedded in the main slide 210, and the guide rod structure 300 is inserted into the sleeve 250 and slidably engaged with the sleeve 250.

It will be appreciated that by providing the sleeve 250 in sliding engagement with the guide bar structure 300, the frictional losses between the guide bar structure 300 and the main guide 210 may be reduced, and in some embodiments, the sleeve 250 may be made of a wear-resistant self-lubricating material, such as teflon, to ensure lubrication and wear resistance.

In the present embodiment, the main column 210 has a movable hole 211 penetrating therethrough, and the output end of the driving member 240 is accommodated in the movable hole 211 and fixedly connected to the main column 210; with this arrangement, the driving member 240 and the main traveling position 210 can be made compact.

Specifically, referring to fig. 3, the bending mold 10 further includes a guide rail structure 500, and the main slide 210 and the sub slide 220 are respectively in sliding fit with the guide rail structure 500; in the guiding position, the sub-row 220 abuts against the rail structure 500.

In this embodiment, by arranging the auxiliary slide 220 to be matched with the guide rail structure 500, after the auxiliary slide 220 moves to the guiding position, the guide rail structure 500 can limit the movement of the auxiliary slide 220, so as to fix the relative position between the guide rod structure 300 and the mold body 100, thereby ensuring the moving accuracy of the insert assembly 400.

In an embodiment, the rail structure 500 includes a main rail 510 and a sub rail 520, the main rail 510 is connected to the sub rail 520, the main row 210 is slidably engaged with the main rail 510, the sub row 220 is slidably engaged with the sub rail 520, and in the guiding position, the sub row 220 abuts against a side of the main rail 510 facing the sub rail 520; the secondary rail 520 is provided with an avoiding groove 521, and the button machine 231 is accommodated in the avoiding groove 521 at the guiding position.

With this arrangement, when the secondary slide 220 moves to abut against the secondary guide rail 520, the button 231 may move toward the avoiding groove 521 under the abutting action of the button 232, so that the button 231 avoids the button 232, and the two are separated, and then the primary slide 210 and the secondary slide 220 may move independently, thereby realizing the movement of driving the insert assembly 400 to move along the guide bar structure 300; when the auxiliary row 220 moves in the opposite direction, the avoiding groove 521 is provided, so that when the fastening element 232 is fastened to the fastening device 231, the fastening device 231 can move towards the avoiding groove 521 to enable the fastening element 232 to enter the fastening groove 222.

Further, referring to fig. 3 and 4, a mounting groove 522 is formed in one side of the secondary rail 520 facing the secondary row 220, the rail structure 500 further includes a limiting component 530, and the limiting component 530 is embedded in the mounting groove 522; in the guiding position, the position limiting component 530 is clamped to the assistant slide 220.

Through set up spacing subassembly 530 and the cooperation of vice capable position 220 on vice guide rail 520, after vice capable position 220 removed to the guide position, spacing subassembly 530 can cooperate with vice capable position 220 joint, can carry on spacingly to vice capable position 220 from this to guarantee the position accuracy between guide arm structure 300 and die body 100.

Specifically, referring to fig. 4, the limiting assembly 530 includes a limiting member 531 and a limiting housing 532, the limiting housing 532 is embedded in the mounting groove 522, a mounting cavity 5321 is formed inside the limiting housing 532, the limiting member 531 is movably accommodated in the mounting cavity 5321, and the limiting member 531 is used for being in snap-fit with the auxiliary slide 220.

With this arrangement, when the limiting member 531 needs to be separated from the secondary slide 220, the limiting member 531 may move toward the installation cavity 5321, and the end of the limiting member 531 is separated from the secondary slide 220, so as to release the limiting effect on the secondary slide 220; by arranging the limiting member 531 in the installation cavity 5321 of the limiting housing 532, the limiting assembly 530 can have a compact structure, and the auxiliary slide 220 can protect the limiting assembly 530 from dust and collision.

Referring to fig. 3 and 4, in the present embodiment, the outer wall of the auxiliary row 220 is formed with a limiting groove 221, and the auxiliary row 220 is engaged with the limiting member 531 through the limiting groove 221.

Further, referring to fig. 4, the secondary rail 520 is provided with a positioning hole 523, the limiting housing 532 is connected with the secondary rail 520 through a fastener 533, and the installation of the limiting assembly 530 is positioned through the connection of the fastener 533 and the positioning hole 523.

In an embodiment, the limiting assembly 530 further includes a resetting member 534, the resetting member 534 is respectively connected to the limiting member 531 and the limiting housing 532, and the resetting member 534 is configured to drive the limiting member 531 to move toward the secondary row 220.

It can be understood that when the secondary row 220 abuts against the limiting member 531, the limiting member 531 drives the reset member 534 to deform and store elastic potential energy, and when the pressure of the secondary row 220 is removed, the reset member 534 releases the elastic potential energy and drives the limiting member 531 to reset.

Referring to fig. 2, in one embodiment, the bending mold 10 further includes a movable mold core (not shown) movably disposed relative to the mold body 100; the mold body 100 includes at least two straight tube cavities 120, and two of the straight tube cavities 120 are respectively communicated with two opposite ends of the elbow cavity 110; the insert assembly 400 is adapted to be received within one of the straight bores 120 and the moving core is adapted to be received within the other straight bore 120.

When the bending mold 10 of the present embodiment is used, the insert assembly 400 is matched with the mold body 100 to form the bending section 201 and one of the straight sections 202 of the product 20, and after the insert assembly 400 is moved to a position in the bending cavity 110, the mold core is moved to correspond to the other straight cavity 120 to form the other straight section 202 of the product 20.

The present application further provides an insert assembly 400, specifically, referring to fig. 3 to 6, the insert assembly 400 is movably connected to the mold body 100, the insert assembly 400 includes a plurality of sets of insert units 410, the insert units 410 include connecting inserts 411, connecting members 412 and connecting pins 413; the connecting insert 411 is for being received within the elbow chamber 110; the connecting pieces 412 are respectively movably connected to the two adjacent connecting inserts 411; the connecting pin 413 is arranged in the connecting piece 412 in a penetrating way and is detachably connected to the connecting insert 411; when two adjacent connecting inserts 411 are connected, the connecting pin 413 is located inside the connecting insert 411.

When the insert assembly 400 of the present embodiment is used, the plurality of sets of insert units 410 may be moved into the bending pipe cavity 110, and combined with the inner wall of the bending pipe cavity 110 to form a cavity for injection molding to form a bent pipe structure, and the adjacent connecting inserts 411 are connected by the connecting member 412 and the connecting pin 413, so that the connecting inserts 411 may move along the bending pipe cavity 110, and the movement interference may be avoided, and in addition, the connecting pin 413 is disposed inside the connecting insert 411, so that the influence on the processing quality and the overall strength of the product 20 due to the exposure of the connecting pin 413 may be avoided.

In the insert assembly 400 of the present embodiment, by providing the insert units 410 to be matched with the mold body 100, the plurality of insert units 410 can form the arc-shaped insert assembly 400 matched with the curved tube cavity 110, so that the product 20 having a combined structure of a curved tube and a straight tube can be formed in one process, and the insert assembly 400 has high processing efficiency and good processing quality.

It should be noted that, in the conventional multi-section insert structure, the opening of the connecting pin is generally disposed on the outer wall of the connecting insert, and after the injection molding is completed, a concave or convex bad structure is easily formed on the surface of the product, and when the bending mold 10 of the present application is used for the injection molding process, since the connecting pin 413 is located inside the connecting insert 411, the flatness of the inner surface or the outer surface of the injection molded product 20 can be ensured, and the processing precision and the processing quality of the product 20 can be improved.

Referring to fig. 6 and 7, in an embodiment, the connecting insert 411 includes a forming portion 4111 and a butting portion 4112, the forming portion 4111 is at least partially arc-shaped and is configured to be received in the curved cavity 110, the butting portion 4112 is connected to one end of the forming portion 4111, the connecting pin 413 is detachably connected to the butting portion 4112, and the other end of the forming portion 4111 is provided with a butting groove 41112; when two adjacent connecting inserts 411 are mated, the mating portion 4112 of one connecting insert 411 is received in the mating groove 41112 of the other connecting insert 411.

With this arrangement, when the insert units 410 are assembled, by arranging the abutting groove 41112 to be connected to the abutting portion 4112, on one hand, the abutting groove 41112 can wrap the abutting portion 4112 to prevent the connecting pin 413 from being exposed, and at the same time, the connection between two adjacent insert units 410 can be positioned, so that the overall profile and structure of the insert assembly 400 correspond to the curved cavity 110 and the straight cavity 120.

Specifically, the abutting portion 4112 has a connecting hole 41121, and the connecting pin 413 is inserted into the connecting member 412 and embedded in the connecting hole 41121.

In the present embodiment, by providing the connection hole 41121 to be engaged with the connection pin 413, the abutting portion 4112 and the connection pin 413 can have a more compact structure, and the connection strength of the connection pin 413 and the connection insert 411 can be ensured.

Further, referring to fig. 4 and 7, the connecting insert 411 is provided with a movable cavity 4113, and the connecting member 412 is movably received in the movable cavity 4113; the inner wall of the movable cavity 4113 is provided with a movable groove 41131, the connecting member 412 comprises a connecting member body 4121 and a connecting shaft 4122, the connecting shaft 4122 is arranged at one end of the connecting member body 4121, the connecting shaft 4122 is in sliding fit with the movable groove 41131, and the connecting pin 413 penetrates through the other end of the connecting member body 4121.

By arranging the connecting shaft portion 4122 and the movable groove 41131 in sliding fit, the connecting piece 412 can have a degree of freedom of movement in the connecting insert 411, and because the connecting insert 411 has an arc-shaped structure, when the connecting insert 411 moves linearly along the guide rod structure 300, the connecting shaft portion 4122 can slide along the movable groove 41131, so that movement interference is avoided, and the compactness of combination between the insert units 410 can be ensured.

In one embodiment, the moving cavity 4113 is communicated with the moving groove 41131.

With this arrangement, when the connecting member 412 moves relative to the connecting insert 411, the connecting member body 4121 can move in the movable cavity 4113, and the connecting shaft portion 4122 can slide in the movable groove 41131, so that not only can a more compact structure be provided between the connecting insert 411 and the connecting member 412, but also the flexibility of movement between the two can be ensured, and the movement of the connecting member 412 can be guided.

Specifically, the connecting hole 41121 communicates with the movable cavity 4113, and the connecting hole 41121 is perpendicular to the movable groove 41131 and communicates with the movable groove 41131.

In this embodiment, by providing the connection hole 41121 to communicate with the movable groove 41131, the connection pin 413 and the connection portion 4121 are connected to one end of the insert 411, so that the insert 411 can be rotatably engaged with the connection pin, and the connection portion 4121 is provided with one end of the connection shaft 4122 to slide along the movable groove 41131, at this time, one end of one of the connection members 412 close to the connection pin 413 can be abutted against one end of the other connection member 4121 close to the connection shaft 4122, so as to limit the movement of the connection member 412, thereby preventing the connection member 412 from coming out of the movable cavity 4113, and ensuring the connection firmness of the connection insert 411 and the connection member 412 on the premise of ensuring the connection activity of the connection insert 411 and the connection member 412.

Further, referring to fig. 4 to 7, the insert unit 410 further includes at least one magnetic member 414, and the magnetic members 414 are respectively disposed at two opposite sides of the connecting insert 411 and are configured to attract two adjacent connecting inserts 411.

With this arrangement, after the insert assembly 400 is moved into the elbow chamber 110, two adjacent insert units 410 may be attracted to each other by the magnetic member 414, so that two adjacent connecting inserts 411 may be attached to each other to eliminate a gap, and the connection between the adjacent insert units 410 may be secured.

In the preferred embodiment, the insert unit 410 has positioning grooves 41113, the positioning grooves 41113 are disposed at two opposite ends of the molding portion 4111, and the magnetic member 414 is embedded in the positioning grooves 41113.

It can be understood that by disposing the magnetic member 414 in the positioning groove 41113 of the connecting insert 411, the end of the magnetic member 414 can be located in the positioning groove 41113, and the magnetic member 414 can be protected from impact by the connecting insert 411, and the insert unit 410 can be made compact.

Referring to the embodiment shown in fig. 6, the insert unit 410 is provided with a plurality of magnetic members 414; it is understood that by providing a plurality of magnetic members 414 to be connected to each other, the magnetic properties of the connection of adjacent insert units 410 may be increased, thereby increasing the connection security of the insert units 410.

Specifically, referring to fig. 3 and 5, the insert assembly 400 further includes an insert seat 420, one end of the insert assembly 400 is configured to be received in the elbow chamber 110, the other end of the insert assembly 400 is connected to the insert seat 420, and the insert seat 420 is configured to drive the insert unit 410 to move toward the elbow chamber 110.

In this embodiment, the insert seat 420 may surround the straight tube cavity 120 to form a cavity for injection molding the straight tube section 202; in addition, the insert seat 520 and the insert unit 410 may be detachably connected, for example, by clamping, screwing, magnetic connection, or plugging, so as to facilitate disassembly and assembly.

Further, referring to fig. 5 to 7, the connecting insert 411 further has a guide hole 41111, the guide rod structure 300 is inserted into the guide hole 41111, and the guide rod structure 300 is configured to slidably contact with an inner wall of the guide hole 41111.

It will be appreciated that when the master row 210 drives the insert assembly 400 along the guide structure 300, the guide structure 300 may drive the insert unit 410 to rotate by engaging the guide hole 41111 with the guide structure 300, and cause the insert unit 410 to sequentially abut the insert assembly 400 moving into the elbow cavity 110 to form the elbow structure, corresponding to the elbow section 201 of the product 20.

In one embodiment, the guide bar structure 300 includes a guide bar 310, the guide bar 310 being movably connected to the insert assembly 400; the guide rod 310 includes a connecting segment 312 and an arc segment 311 connected to each other, and in the guiding position, the arc segment 311 and the connecting segment 312 are respectively slidably engaged with the insert assembly 400 and drive the insert assembly 400 to move from the straight tube cavity 120 to the curved tube cavity 110.

When the bending die 10 of this embodiment is used, the guide rod 310 is driven to move to the guide position, at this time, the connecting section 312 of the guide rod 310 can drive the insert assembly 400 to move along the linear direction, and then the insert assembly 400 can move towards the bending die cavity 110 under the driving action of the arc-shaped section 311 until a cavity for injection molding of the bent tube structure is formed in the bending die cavity 110, and a cavity for injection molding of the straight tube structure is formed with the straight tube cavity 120, so that the product 20 with the combined structure of the bent tube and the straight tube can be formed by injection molding of the bending die 10.

In the bending mold 10 of the present embodiment, by setting the matching between the guiding rod 310 and the insert assembly 400, the guiding rod 310 can drive the insert assembly 400 to move into the bending cavity 110 of the mold body 100, and combine with the mold body 100 to form a cavity for injection molding of the product 20 having a combined structure of a bent pipe and a straight pipe, and the processing can be completed through one process, so that the processing efficiency is high, and the processing quality is good.

In the preferred embodiment, the guide bar structure 300 includes a plurality of sets of guide bars 310, the guide bars 310 are connected to the sub-row 220; the number of the guide holes 41111 is plural, each guide hole 41111 is slidably engaged with at least one guide rod 310, and the plurality of guide rods 310 are arranged in parallel.

In this embodiment, by arranging a plurality of sets of guide rods 310 to cooperate with the insert unit 410, the smoothness of movement of the insert unit 410 can be improved, and the movement of the insert unit 410 can be limited, thereby preventing the insert unit 410 from rotating and affecting the manufacturing accuracy of the product 20.

Specifically, referring to fig. 2 and 5, the guide bar structure 300 further includes a guide bar seat 320, the guide bar seat 320 is detachably connected to the assistant slide 220 and the guide bar 310, respectively, and the guide bar seat 320 is slidably engaged with the sleeve 250.

The guide rod seat 320 is detachably connected with the guide rod 310 and the auxiliary slide 220 respectively, so that the disassembly, assembly and maintenance are facilitated; through setting up guide rod seat 320 and sleeve 250 sliding fit, not only can guarantee the counterpoint precision between the two when main position 210 is connected with vice position 220, also can lead to the removal of main position 210 simultaneously to improve the removal precision and the compliance of main position 210.

Referring to fig. 5, in an embodiment, a guide groove 313 is formed on a side of the guide rod 310 away from the elbow chamber 110, and the guide groove 313 is used for driving the insert assembly 400 to rotate towards the elbow chamber 110.

According to this arrangement, when the insert assembly 400 moves along the guide bar structure 300 toward the curved cavity 110, the insert assembly 400 first moves linearly along the connecting section 312, and then the arc-shaped section 311 is matched with the insert unit 410, so that the insert unit 410 can be driven to rotate and move toward the curved cavity 110, and the guide groove 313 is arranged corresponding to the insert unit 410, so that at least part of the insert unit 410 can be accommodated in the guide groove 313 during rotation, thereby preventing the motion interference between the guide bar 310 and the insert unit 410.

Specifically, referring to fig. 8, the guide groove 313 has a first connection surface and a second connection surface connected, the first connection surface being connected to the arc-shaped section 311, the second connection surface being connected to the connection section 312; the included angle C1 between the first connecting surface and the tangent of the arc-shaped section 311 is 4-6 degrees, and the included angle C2 between the second connecting surface and the connecting section 312 is 1-2 degrees.

It will be appreciated that by providing the guide slot 313 with included angles C1 and C2, the insert unit 410 is enabled to align with the curved lumen 110 during rotation while avoiding interference of movement between the insert unit 410 and the guide rod 310. In the embodiment shown in FIG. 8, the angle C1 between the first connecting surface and the tangent of the arcuate segment 311 is 4.5, and the angle C2 between the second connecting surface and the segment 312 is 1.8

Further, the radius of curvature of the arcuate section 311 is 90-110 mm.

With this arrangement, the insert unit 410 is guided by the arc segment 311 and then precisely moves into the elbow chamber 110, and forms the elbow-structured insert assembly 400. Specifically, the radius of curvature of the arcuate segment 311 may be 90mm, 95mm, 100mm, 105mm, 110 mm.

Specifically, the radius of curvature R1 of the outer arc surface of the arc-shaped section 311 on the side away from the curved tube cavity 110 is 100-110 mm.

In one embodiment, the radius of curvature R1 of the extrados of the arcuate segment 311 on the side away from the curved lumen 110 is 105 mm; in other embodiments, the curvature radius R1 may be 100mm, 102mm, 106mm, 110mm, etc., and the guiding effect of the arc segment 311 will be deteriorated when the range of R1 is exceeded.

Specifically, the radius of curvature of the intrados of the arcuate segment 311 on the side facing the curved lumen 110 is 95-105 mm. In one embodiment, the radius of curvature R2 of the intrados of the arcuate segment 311 on the side facing the curved lumen 110 is 100 mm; in other embodiments, the radius of curvature R1 may be 95mm, 98mm, 105mm, etc., and the guiding effect of the arc segment 311 may be degraded when the radius is beyond the range of R2.

Specifically, the width D of the guide bar 310 is 4-6 mm.

In one embodiment, the width D of the guide bar 310 is 5 mm; with this arrangement, the guide rod 310 can be made to have a compact structure and ensure its guiding effect. When the width D of the guide bar 310 is excessively large, a deterioration phenomenon in which the guide bar 310 and the insert unit 410 are interfered with each other in motion is likely to occur.

Further, the width of the guide hole 41111 is not less than 6 mm.

In this embodiment, the width of the guiding hole 41111 may be 6mm, 6.5 mm; preferably, the width of the guide hole 41111 is greater than the width D of the guide rod 310, so that a certain gap is formed between the guide rod 310 and the inner wall of the guide hole 41111, so that the insert unit 410 can move relative to the guide rod 310.

In the preferred embodiment, the end of the arcuate section 311 remote from the connecting section 312 is provided with a guide radius 3111.

With this arrangement, when the insert assembly 400 is assembled with the guide bar 310, the guide hole 41111 of the insert assembly 400 may correspond to the guide fillet 3111 of the guide bar 310, so that the assembly of the two is facilitated, the structure is simple, and the assembly efficiency is improved.

Referring to fig. 1 and 9, in one embodiment, the insert assembly 400 is movably disposed relative to the mold body 100 and is capable of moving into the elbow chamber 110 and the straight tube chamber 120; the mold body 100 is provided with a straight tube cavity 120 and an elbow tube cavity 110, the straight tube cavity 120 is communicated with an opening of the elbow tube cavity 110, and the elbow tube cavity 110 extends along a circular arc path; the mold body 100 is further provided with a glue inlet cavity 130, a glue inlet port 131 of the glue inlet cavity 130 is communicated with the bent pipe cavity 110, and the glue inlet port 131 is located on one side of the outer arc surface of the bent pipe cavity 110.

When the bending mold 10 of the embodiment is used, the glue inlet cavity 130 is arranged on one side of the outer arc surface of the bending cavity 110, and in the injection molding process, pressure can be applied to the insert assembly 400 in the bending cavity 110, so that the whole body of the insert assembly is kept stable, and the molding effect of the injection molding product 20 is ensured.

In the elbow bending mold 10 of the present embodiment, by arranging the mold body 100 and the insert assembly 400 to cooperate, in the injection molding process, pressure may be applied to the outer arc surface of the insert assembly 400 to ensure stability and fixation of the insert assembly 400, so as to ensure the molding effect of the injection molded product 20.

Specifically, referring to FIG. 9, the orthogonal projection of the glue inlet port on the phantom 100 is located between 1/3-2/3 of the arc of the curved lumen 110.

When the mold body 100 of the embodiment is used, in an injection molding process, pressure F can be generated when external injection molding liquid enters the curved cavity 110 through the glue inlet port 131, the pressure F applies pressure to the outer arc surface of the curved pipe section 201 of the product 20, that is, the outer arc surface of the insert assembly 400 can be tightly jacked through the pressure F, so that the insert assembly 400 is kept stable and fixed, compared with the case that the glue inlet port 131 is arranged on the inner arc surface of the curved cavity 110, the situation that the insert assembly 400 is scattered due to the pressure generated in the injection molding process can be avoided, and the injection molding effect of the product 20 is ensured.

Referring to fig. 9, in one embodiment, the arc a1 of the curved lumen 110 is 90 ° and the glue inlet port is located between the arc 30 ° and the arc 60 ° of the curved lumen 110.

It should be noted that as shown in fig. 9, a2 in the drawing is the setting range of the glue inlet port 131, and when the setting range is in this range, the pressure F can be stably distributed on the outer arc surface of the insert assembly 400, so as to ensure that the stress on the insert assembly 400 is uniform, and further, the insert assembly 400 is stable and fixed during the injection molding process.

In one embodiment, the glue inlet port 131 is located at an arc of 45 ° of the curved lumen 110. When the glue inlet 131 is arranged at the radian of 45 degrees of the elbow cavity 110, the pressure F can be ensured to be in the middle of the elbow cavity 110, so that the pressure F is in the optimal stable position.

In a preferred embodiment, the arc of the connecting insert 411 is not greater than the arc of the curved lumen 110, and the arc of the insert assembly 400 is not less than the arc of the curved lumen 110.

It can be understood that, in the present embodiment, the connecting inserts 411 of the multiple sets of insert units 410 abut against each other, so that a space for injection molding of the elbow section 201 of the product is formed by filling the elbow cavity 110 and the inner wall of the elbow cavity 110, and in the injection molding process, due to the arrangement position of the glue inlet port 131, a pressure F is generated and acts on the outer arc surface of the insert assembly 400, so that the multiple connecting inserts 411 can be driven to abut against each other on the side facing the center of the circle, thereby ensuring the overall structural stability of the insert assembly 400. Of course, for example, when the arc a1 of the straight tube cavity 120 is 90 °, the arc of the insert assembly 400 may be larger than 90 ° so as not to affect the molding of the straight tube cavity 120 of the mold body 100, which is not limited herein.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A bending die, comprising:

the guide rod structure is movably connected to the insert assembly, and at least part of the guide rod structure is accommodated in the straight pipe cavity and used for guiding the insert assembly to the bent pipe cavity when the guide rod structure is at a guide position; and

2. The bending die according to claim 1, wherein the slide means further comprises a fastening assembly, the fastening assembly comprising a fastening machine and a fastening member, the fastening machine being movably connected to the secondary slide, the fastening member being provided on the primary slide, the fastening machine being snap-fitted with the fastening member when the guide bar structure is moved towards the guide position; after the guide bar structure is moved to the guide position, the sear is disconnected from the fastener.

3. The bending die according to claim 2, wherein the slide device further comprises a driving member disposed through the sub slide and connected to the main slide, and the driving assembly is configured to drive the main slide to move toward the die body and to disconnect the fastening device from the fastening member.

4. The bending die according to claim 3, wherein the slide device further comprises a sleeve, the sleeve is embedded in the main slide, and the guide rod structure is arranged in the sleeve in a penetrating manner and is in sliding fit with the sleeve.

5. The bending die according to claim 2, further comprising a rail structure, wherein the primary and secondary rows are slidably engaged with the rail structure, respectively; and when the guide position is reached, the auxiliary row position is abutted against the guide rail structure.

6. The bending die according to claim 5, wherein the rail structure comprises a primary rail and a secondary rail, the primary rail is connected to the secondary rail, the primary row is in sliding fit with the primary rail, the secondary row is in sliding fit with the secondary rail, and in the guiding position, the secondary row abuts against a side of the primary rail facing the secondary rail; and the auxiliary guide rail is provided with an avoiding groove, and the button machine is accommodated in the avoiding groove at the guide position.

7. The bending die according to claim 6, wherein a mounting groove is formed in one side of the secondary guide rail facing the secondary slide, and the guide rail structure further comprises a limiting component embedded in the mounting groove; and when the guide position is adopted, the limiting component is clamped on the auxiliary slide.

8. The bending die according to claim 7, wherein the limiting assembly comprises a limiting member and a limiting shell, the limiting shell is embedded in the mounting groove, a mounting cavity is formed in the limiting shell, the limiting member is movably accommodated in the mounting cavity, and the limiting member is used for being in clamping fit with the auxiliary slide.

9. The bending die according to claim 8, wherein the limiting assembly further comprises a resetting member, the resetting member is respectively connected to the limiting member and the limiting housing, and the resetting member is used for driving the limiting member to move toward the secondary slide.

10. The bending die according to any one of claims 1-9, further comprising a movable die body movably disposed relative to the die body; the die body comprises at least two straight tube cavities, and the two straight tube cavities are respectively communicated with two opposite ends of the bent tube cavity; the insert assembly is used for being contained in one straight tube cavity, and the movable mold core is used for being contained in the other straight tube cavity.