Arc-shaped core demolding device and injection mold with same

Abstract

The utility model discloses an arc-shaped core demolding device. A rotating module is arranged on a mold; the demolding module is movably connected to the mold through a supporting block, and the demolding module is connected with the output end of the rotating module; the transverse moving mechanism is movably connected with an internal thread withdrawing mechanism, and the output end of the rotating mechanism is connected with the internal thread withdrawing mechanism. The end, away from the arc-shaped end of the arc-shaped mold core, of the arc-shaped mold core penetrates through the internal thread withdrawing mechanism and is connected with the base, and the arc-shaped end of the arc-shaped mold core is located on the side, close to the mold core, of the base. According to the scheme, through the arrangement of the reset piece and the rotating motor, the rotating piece can transversely move and rotate at the same time, and the threaded end of the rotating piece retreats from an internal thread of a formed part; according to the demolding device, the arc-shaped mold core can be automatically separated from the arc-shaped inner hole of the plastic part by doing the arc-shaped motion, so that the plastic part with the arc-shaped inner hole and the internal thread can be automatically produced, the production efficiency is improved, and the manufacturing cost of the part is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mold manufacturing, in particular to an arc core demolding device and an injection mold with the same. BACKGROUND

[0002] With the progress of injection molding process technology and the improvement of user level, the precision and quality of plastic products are also improved. The mold for injection molding of the inner threaded injection molded part has an inner thread, and the mold cavity has a core for forming the thread. The existing mold is time-consuming and laborious to demold the injection molded part after injection molding, and the demolding efficiency is low, and automatic demolding cannot be realized. These are one of the factors affecting production efficiency, and the demolding efficiency is difficult to improve.

[0003] ATTACHMENT Figure 1 A front perspective view of a plastic part 10a, which has an arc-shaped inner hole 14a, two recessed holes 16a at one end of the part, a second material layer covering the outer part 11a, and an inner thread 13a at the other end. The plastic part 10a has an arc-shaped inner hole 14a, and it is difficult for the core to separate from the part. The traditional production method is manual demolding or half-injection molding followed by gluing, so the production efficiency is low and the manufacturing cost is high. To solve this problem, the present application improves the injection mold. SUMMARY

[0004] The present application provides an arc core demolding device and an injection mold with the same, which can realize automatic production of plastic parts with arc-shaped inner holes and inner threads, improve production efficiency, and reduce the manufacturing cost of the parts. The above technical purpose can be achieved by adopting the following technical features, and other technical effects can be achieved.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] One object of the present application is to provide an arc core demolding device, which comprises a rotating module and a demolding module. The rotating module is arranged on the mold, and the demolding module is movably connected to the mold through a support block, and the demolding module is connected to the output end of the rotating module.

[0007] The demolding module comprises a base, a horizontal moving mechanism movably connected to the base, a rotating mechanism arranged on the base, and an arc-shaped mold core; at least two inner thread withdrawing mechanisms are movably connected to the horizontal moving mechanism, and an output end of the rotating mechanism is connected to the inner thread withdrawing mechanisms to drive the threaded end of the inner thread withdrawing mechanisms to withdraw from the molded part; one end of the arc-shaped mold core away from the arc-shaped end thereof penetrates through the inner thread withdrawing mechanisms and is connected to the base, and the arc-shaped end of the arc-shaped mold core is located on the side of the base close to the mold core; the rotating module drives the demolding module to move along the arc direction of the arc-shaped mold core, so that the arc-shaped end of the arc-shaped mold core withdraws from the molded part.

[0008] Further, the rotating module comprises a linear telescopic mechanism, a rack, and a transmission gear; the linear telescopic mechanism is arranged on the mold, and the telescopic end of the linear telescopic mechanism is connected to the rack; the transmission gear is rotatably connected to the mold, and the transmission gear is engaged with the rack; the transmission gear is engaged with the arc-shaped teeth arranged on the base.

[0009] Further, the horizontal moving mechanism comprises a first sliding block and a second sliding block; the first sliding block is slidingly arranged in a sliding groove arranged on the base, and the second sliding block is connected to the first sliding block; the first sliding block and the second sliding block cooperatively form a transmission cavity.

[0010] Further, one end of the second sliding block is connected to a reset rod, the other end of the reset rod penetrates through a first through hole arranged on the base and extends to the side of the base away from the mold core, and a reset member is arranged between the other end of the reset rod and the base; a pushing space for inserting an insertion block is arranged between the second sliding block and the base, and the insertion block is connected to the mold;

[0011] The insertion block is used to insert into the pushing space during the mold closing process of the mold, and the first sliding block moves towards the mold core under the action of the insertion block; the insertion block is pulled out of the pushing space during the mold opening process of the mold, and the first sliding block moves away from the mold core under the action of the reset member.

[0012] Further, the inner thread withdrawing mechanism comprises a rotating member and a driven gear,

[0013] one end of the driven gear is connected to the rotating member, and the driven gear is arranged in the transmission cavity; the other end of the rotating member penetrates through a second through hole arranged on the first sliding block and extends to the side of the first sliding block close to the mold core, and the other end of the rotating member is provided with a thread; one end of the arc-shaped mold core away from the arc-shaped end thereof is connected to the base, the arc-shaped mold core penetrates through a third through hole arranged on the rotating member, and the arc-shaped end of the arc-shaped mold core is located on the side of the first sliding block close to the mold core.

[0014] Further, the two internal thread retracting mechanisms are equidistantly arranged on the horizontal moving mechanism; a synchronous gear is rotatably connected in the transmission cavity, and the synchronous gear is meshed with the driven gears arranged on the two internal thread retracting mechanisms.

[0015] Further, the rotating mechanism comprises a rotating motor and a driving gear; the rotating motor is connected to the base, and the output end of the rotating motor is connected with the driving gear through a transmission member;

[0016] During the horizontal moving process of the internal thread retracting mechanism, the driving gear is always meshed with the driven gear arranged on at least one internal thread retracting mechanism.

[0017] Further, the base is provided with a guide protrusion, and the supporting block is provided with a guide groove matched with the guide protrusion;

[0018] The guide protrusion is used for moving the demolding module along the arc direction of the arc-shaped mold core, and withdrawing the arc-shaped end of the arc-shaped mold core from the molded part.

[0019] Another object of the present application is to provide an injection mold comprising a front mold, a mold core, a rear mold and two arc core demolding devices; the front mold, the mold core and the rear mold are sequentially arranged from front to back, the mold core comprises a front mold core and a rear mold core, and the front mold core and the rear mold core cooperatively form a molding cavity; the arc core demolding device is arranged on the rear mold, and the two arc core demolding devices are symmetrically arranged on the two sides of the mold core.

[0020] Further, the molding cavity is provided with a positioning protrusion, and the arc-shaped end of the arc-shaped mold core is provided with a positioning groove matched with the positioning protrusion; the molding cavity is provided with a ring-shaped blocking strip.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The horizontal moving mechanism and the rotating mechanism are arranged, so that the rotating member simultaneously performs horizontal moving and rotating movement, and the threaded end of the rotating member is withdrawn from the internal thread of the molded part; meanwhile, the rotating module is arranged, so that the arc-shaped mold core can be automatically separated from the arc-shaped inner hole of the plastic part by performing arc line movement, so that the automatic production of the plastic part with an arc-shaped inner hole and an internal thread is realized, the production efficiency is improved, and the manufacturing cost of the part is reduced.

[0023] In addition, since the injection molding product comprises an internal thread structure and a bent pipe structure, through a special demolding module and a rotating module, the automatic injection molding production of the product is realized, the product molding quality is effectively ensured, the mold production cost and the product injection molding cost are reduced, the mold structure is reasonable in design, compact in structure, stable in work, safe and reliable, and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed for the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0025] Figure 1 It is a perspective view of a plastic part of the present application.

[0026] Figure 2 It is a schematic view of the overall structure of the injection mold of the present application.

[0027] Figure 3 It is a schematic view of the top structure of the injection mold of the present application.

[0028] Figure 4 It is an A-A sectional view of the present application in the state of mold closing. Figure 3

[0029] Figure 5 It is an A-A sectional view of the present application in the state of mold opening. Figure 3

[0030] Figure 6 It is a sectional structure perspective view of the front mold of the present application

[0031] Figure 7 It is a schematic view of the internal structure of the mold core of the present application.

[0032] Figure 8 It is a schematic view of the structure of the supporting block of the present application.

[0033] Figure 9 It is a schematic view of the combination structure of the arc core demolding device and the rear mold of the present application.

[0034] Figure 10 It is a schematic view of the overall structure of the arc core demolding device of the present application.

[0035] Figure 11 It is a schematic view of the top structure of the demolding module of the present application.

[0036] Figure 12 It is a schematic view of the overall structure of the arc core demolding device of the present application.​​Figure 11 BB cross-sectional view.

[0037] Figure 13 This utility model Figure 11 CC section view.

[0038] Figure 14 This is a schematic diagram of the arc-shaped mold core and the unthreading mechanism of this utility model.

[0039] Figure 15 This is a schematic diagram of the combined structure of the rotating module and the rear template of this utility model. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0041] like Figures 1 to 15 As shown in one example, this solution provides an injection mold, which includes a front mold 100, a mold core, a rear mold 200, and two arc-shaped core demolding devices;

[0042] Reference Figure 2 As shown, the front mold 100, the mold core, and the rear mold 200 are arranged sequentially from front to back. The mold core includes a front mold core 140 and a rear mold core 240. The front mold core 140 and the rear mold core 240 cooperate to form a molding cavity 700, and the mold core is provided with at least two molding cavities 700. The molding cavity 700 is provided with an annular baffle 241.

[0043] It should be noted that the specific number of molding cavities 700 within the mold core needs to be selected and designed based on the size, quantity, structural complexity, and material of the injection molded part; in this embodiment, such as Figure 9 As shown, there are 8 molding cavities 700.

[0044] Among them, reference Figures 2-6 As shown, the specific structure of the front mold 100 is as follows:

[0045] like Figure 4 , Figure 5 and Figure 6 As shown, the front mold 100 includes a front template 110, an injection part 112, a front pad 120, and a front mold frame 130. The front template 110 is connected to the front mold frame 130, and the front pad 120 is located between the front template 110 and the front mold frame 130. The side of the front mold frame 130 away from the front template 110 is connected to the front mold core 140.

[0046] Next, referring to Figure 7 As shown in the drawings, the front pad plate 120 cooperates with the front mold frame 130 to form an injection space 131, the front mold frame 130 and the front mold core 140 are both provided with an injection channel, and the injection channel is in communication with the injection space 131, so that the injection space 131 is in communication with each forming cavity 700 through the injection channel.

[0047] At the same time, referring to Figure 6 As shown in the drawings, the front mold plate 110 is provided with a first window 114, and the injection member 112 is embedded in the first window 114; the end of the injection member 112 close to the front mold core 140 passes through the opening provided on the front pad plate 120 and extends into the injection space 131, the injection member 112 is provided with an injection hole 113, and the injection hole 113 is in communication with the injection space 131.

[0048] Therefore, the injection hole 113 is in communication with each forming cavity 700 through the injection space 131 and the injection channel; in this embodiment, the injection molding mold can inject each forming cavity 700 through the injection hole 113.

[0049] Among them, referring to Figures 2-9 and Figure 15 As shown in the drawings, the specific structure of the rear mold 200 is as follows:

[0050] As shown in Figure 4 , Figure 5 , Figure 9 and Figure 15 The rear mold 200 includes a rear mold plate 230, a rear pad strip 220, and a rear mold frame 210, the rear mold plate 230 is connected to the rear mold frame 210 through the rear pad strip 220, and the side of the rear mold frame 210 away from the rear mold plate 230 is connected to the rear mold core 240.

[0051] The rear mold plate 230, the rear pad strip 220, and the rear mold frame 210 cooperatively form a left-right through arrangement of the installation space 221, and the rotating module 500 is arranged in the installation space 221; the demolding module 400 is movably connected to the mold through the support block 300, and the demolding module 400 is arranged on the left and right sides of the rear mold core 240; the demolding module 400 is connected to the output end of the rotating module 500.

[0052] In addition, referring to Figure 4 , Figure 6 and Figure 9As shown, at least two positioning guide columns 150 are connected to the front mold frame 130, the rear cushion strip 220, the rear mold frame 210 and the support block 300 are each provided with at least two positioning guide holes matched with the positioning guide columns 150, and the positioning guide holes of the rear cushion strip 220, the rear mold frame 210 and the support block 300 are arranged in one-to-one correspondence; therefore, the positioning guide columns 150 are inserted into the positioning guide holes, and the positioning guide holes and the positioning guide columns 150 are arranged in one-to-one correspondence; during the mold opening and closing process of the front and rear molds, the positioning guide holes and the positioning guide columns 150 are matched with each other, so that the front mold core 140 and the rear mold core 240 can be smoothly closed and separated.

[0053] It should be noted that in the present embodiment, four positioning guide columns 150 are connected to the front mold frame 130, and the four positioning guide columns 150 are located at the four corners of the front mold frame 130, so that the rear mold frame 210 and the front mold frame 130 can be smoothly separated and closed, so that the front mold core 140 and the rear mold core 240 can be smoothly separated and closed, and the front mold core 140 and the rear mold core 240 are matched and enclosed to form the forming cavity 700.

[0054] Referring to Figures 2-15 As shown, the arc core stripping device is arranged on the rear mold 200, and the two arc core stripping devices are arranged symmetrically on the left and right sides of the mold core; the arc-shaped mold core 600 is arranged on the arc core stripping device, and the arc-shaped end portion 610 of the arc-shaped mold core 600 is located on the side of the arc core stripping device close to the rear mold core 240.

[0055] In the present embodiment, the arc core stripping device is arranged on the arc core stripping device, so that the arc-shaped mold core 600 arranged on the arc core stripping device is stripped from the forming cavity 700; the linear telescopic mechanism 510 drives the rack 520, and the arc-shaped mold core 600 arranged on the stripping module 400 is driven by the transmission gear 530 to perform core pulling, so that the stress of each structural part is balanced, the influence of machining precision and friction force is eliminated, and the stability and reliability of the mold are ensured.

[0056] Referring to Figures 9-15 As shown, the specific structure of the arc core stripping device is as follows:

[0057] The arc core stripping device comprises a rotating module 500 and a stripping module 400.

[0058] Referring to Figure 9 and Figure 10As shown, the rotating module 500 is arranged on the mold, the demolding module 400 is movably connected to the mold through the support block 300, and the demolding module 400 is connected to the output end of the rotating module 500; at the same time, the demolding module 400 comprises a base 410, a horizontal moving mechanism movably connected to the base 410, a rotating mechanism arranged on the base 410, and an arc-shaped mold core 600; one end of the arc-shaped mold core 600 away from the arc-shaped end portion 610 penetrates through the internal thread mechanism 430 and is connected to the base 410, and the arc-shaped end portion 610 of the arc-shaped mold core 600 is located on the side of the base 410 close to the mold core;

[0059] In the mold parting process of the front mold and the rear mold, the rotating mechanism and the horizontal moving mechanism are simultaneously driven to make the threaded end portion of the internal thread mechanism 430 withdraw from the molded part; and the rotating module 500 drives the demolding module 400 to move along the arc direction of the arc-shaped mold core 600, so that the arc-shaped end portion 610 of the arc-shaped mold core 600 withdraws from the molded part.

[0060] The arc-shaped end portion 610 of the arc-shaped mold core 600 can be used to form a plastic part with an arc-shaped inner hole; the arc-shaped core demolding device is arranged on the rear mold; after the linear extension mechanism 510 in the rotating module 500 operates, the base 410 and the support block 300 can be driven to rotate relative to each other through the cooperation of the rack 520, the transmission gear 530 and the arc-shaped teeth 420, so that the driving rack 520 can drive the base 410 to move in an arc line, and since the arc-shaped mold core 600 is arranged on the base 410, the arc-shaped mold core 600 can also move in an arc line.

[0061] At the same time, the rotating mechanism and the horizontal moving mechanism are arranged on the base 410, and the internal thread mechanism 430 is arranged on the horizontal moving mechanism; after the rotating motor 440 in the rotating mechanism operates, the internal thread mechanism 430 and the base 410 can be driven to rotate relative to each other through the cooperation of the driving gear 441, the synchronous gear 452 and the driven gear 431, so that the rotating part 433 can rotate; at the same time, under the action of the reset part 462, the rotating part 433 moves away from the mold core; and the threaded end portion of the rotating part 433 withdraws from the internal thread of the molded part.

[0062] After the plastic part is formed, the rotating part 433 simultaneously moves horizontally and rotates under the action of the horizontal moving mechanism and the rotating mechanism, so that the threaded end portion of the rotating part 433 withdraws from the internal thread of the molded part; since the blocking strip 241 in the form of a ring is arranged in the forming cavity 700, the blocking strip 241 blocks the plastic part, and the arc-shaped mold core 600 can automatically separate from the arc-shaped inner hole 14a of the plastic part by moving in an arc line, so that the plastic part with an arc-shaped inner hole and an internal thread can be automatically produced, the production efficiency is improved, and the manufacturing cost of the part is reduced.

[0063] In the embodiment, the automatic injection molding production of the product is realized through the setting of the demolding module and the rotating module, the product molding quality is effectively ensured, and the mold production cost and the product injection molding cost are reduced.

[0064] As shown in the figure, the specific structure of the demolding module 400 is as follows: Figures 11-14 As shown in the figure, the demolding module 400 comprises a base 410, a horizontal moving mechanism movably connected to the base 410, a rotating mechanism arranged on the base 410, and an arc-shaped mold core 600.

[0065] Figure 11 As shown in the figure, the demolding module 400 comprises a base 410, a horizontal moving mechanism movably connected to the base 410, a rotating mechanism arranged on the base 410, and an arc-shaped mold core 600.

[0066] As shown in the figure, the left and right sides of the base 410 are provided with guide protrusions 411, and the support blocks 300 are provided with guide grooves 310 matched with the guide protrusions 411; the guide protrusions 411 are used to make the demolding module 400 move along the arc direction of the arc-shaped mold core 600, and to make the arc-shaped end portion 610 of the arc-shaped mold core 600 exit from the molded part; the left and right sides of the base 410 are connected with the support blocks 300, and the guide protrusions 411 of the base 410 are inserted into the guide grooves 310; the arc curve of the guide protrusions 411 is matched with the arc-shaped end portion 610 of the arc-shaped mold core 600, so that the arc-shaped mold core 600 can move in an arc line, thereby making the arc-shaped end portion 610 of the arc-shaped mold core 600 exit from the molded part.

[0067] It should be noted that the side of the base 410 close to the rear mold frame 210 is provided with a circular arc transition surface 412, and through the setting of the circular arc transition surface 412, the base 410 and the rear mold frame 210 will not interfere with each other during the arc movement of the base 410.

[0068] In addition, as shown in the figure, the rotating module 500 comprises a linear extension mechanism 510, a rack 520 and a transmission gear 530; the linear extension mechanism 510 is arranged on the mold, and the extension end of the linear extension mechanism 510 is connected with the rack 520; the transmission gear 530 is rotatably connected to the mold, and the transmission gear 530 is engaged with the rack 520; the transmission gear 530 is engaged with the arc-shaped teeth 420 arranged on the base 410. Figure 10 In the embodiment, the linear extension mechanism 510 is a telescopic cylinder; however, the linear extension mechanism 510 is not only a telescopic cylinder, but also a telescopic oil cylinder, a telescopic motor and a linear motor, as long as the driving rack 520 can move linearly, the linear extension mechanism 510 can adopt any mechanism to produce the same effect.

[0069]

[0070] ​​Meanwhile, the straight line telescopic mechanism 510 in the rotating module 500 is actuated, and the base 410 and the supporting block 300 are relatively rotated through the cooperation of the rack 520, the transmission gear 530, the guide protrusion 411 and the arc-shaped teeth 420, so that the driving rack 520 can drive the base 410 to move in an arc line, and since the arc-shaped mold core 600 is arranged on the base 410, the arc-shaped mold core 600 can also move in an arc line, so that the arc-shaped end portion 610 of the arc-shaped mold core 600 is withdrawn from the molded part.

[0071] As shown in Figures 11-14 , the specific structure of the transverse moving mechanism is as follows:

[0072] The transverse moving mechanism movably connects at least two internal thread withdrawing mechanisms 430, and the output end of the rotating mechanism is connected with the internal thread withdrawing mechanisms 430; one end of the arc-shaped mold core 600 away from the arc-shaped end portion 610 penetrates through the internal thread withdrawing mechanism 430 and is connected with the base 410, and the arc-shaped end portion 610 of the arc-shaped mold core 600 is located on the side of the base 410 close to the mold core.

[0073] Further, as shown in Figure 12 , the specific structure of the transverse moving mechanism is as follows:

[0074] The transverse moving mechanism includes a first sliding block 450 and a second sliding block 460, the first sliding block 450 is slidingly arranged in the sliding groove 413 of the base 410, and the second sliding block 460 is connected with the first sliding block 450; the first sliding block 450 and the second sliding block 460 cooperatively form a transmission cavity 451.

[0075] Meanwhile, the second sliding block 460 is connected with one end of a reset rod 461, the other end of the reset rod 461 penetrates through the first through hole of the base 410 and extends to the side of the base 410 away from the mold core, and a reset member 462 is arranged between the other end of the reset rod 461 and the base 410; a pushing space for inserting the insert block 160 is arranged between the second sliding block 460 and the base 410, and the insert block 160 is connected with the mold;

[0076] The insert block 160 is connected with the front mold frame 130, and the insert block 160 and the second sliding block 460 are both provided with a guide inclined surface; the first sliding block 450 is moved to the direction close to the mold core under the descending of the insert block 160; the reset member 462 is a reset spring.

[0077] The insert block 160 is used for inserting into the pushing space during the mold clamping process of the front mold and the rear mold, and the first sliding block 450 is moved to the direction close to the mold core under the action of the insert block 160; the insert block 160 is pulled out of the pushing space during the mold parting process of the front mold and the rear mold, and the first sliding block 450 is moved to the direction away from the mold core under the action of the reset member 462.

[0078] In this embodiment, during the mold closing and opening process of the front and rear molds, due to the setting of the reset member 462 and the insert block 160, the first slider 450 moves left and right in the sliding groove 413 under the action of the insert block 160 and the reset member 462, thereby enabling the rotating member 433 of the unthreading mechanism 430 connected to the first slider 450 to move left and right.

[0079] Among them, reference Figures 11-14 As shown, the specific structure of the unthreading mechanism 430 is as follows:

[0080] like Figures 11-14 As shown, the unthreading mechanism 430 includes a rotating member 433 and a driven gear 431. The driven gear 431 is connected to one end of the rotating member 433 and is located in the transmission cavity 451. The other end of the rotating member 433 passes through the second through hole of the first slider 450 and extends to the side of the first slider 450 near the mold core. The other end of the rotating member 433 is provided with a thread 432. The arc-shaped mold core 600 is connected to the base 410 at one end away from its arc-shaped end 610. The arc-shaped mold core 600 passes through the third through hole of the rotating member 433. The arc-shaped end 610 of the arc-shaped mold core 600 is located on the side of the first slider 450 near the mold core.

[0081] The base 410 has a connecting block 480 on the side away from the mold core, and the connecting block 480 and the base 410 cooperate to form a connecting cavity 481; the arc-shaped mold core 600 extends into the connecting cavity 481 from the arc-shaped end 610, and the arc-shaped mold core 600 engages with the locking block inside the connecting cavity 481; since the arc-shaped mold core 600 passes through the third through hole opened in the rotating member 433, the arc-shaped mold core 600 will not move when the rotating member 433 moves.

[0082] Reference Figures 10-14 As shown, the rotating mechanism includes a rotary motor 440 and a drive gear 441; the rotary motor 440 is connected to the base 410, and the output end of the rotary motor 440 is connected to the drive gear 441 through a transmission component, and the drive gear 441 meshes with the driven gear 431 in the transmission cavity 451.

[0083] During the lateral movement of the unthreading mechanism 430, the driving gear 441 is always engaged with at least one driven gear 431 provided in the unthreading mechanism 430.

[0084] It should be noted that in the embodiment, four internal thread retracting mechanisms 430 are arranged on the demolding module 400, the four internal thread retracting mechanisms 430 are equidistantly arranged on the horizontal moving mechanism, the driven gears 431 of the internal thread retracting mechanisms 430 are rotatably arranged in the transmission cavity 451; the driving gear 441 is arranged in the middle of the four internal thread retracting mechanisms 430, and the driving gear 441 is meshed with the two driven gears 431 respectively; meanwhile, the synchronous gear 452 is rotatably connected in the transmission cavity 451, and the synchronous gear 452 is meshed with the driven gears 431 arranged on the two internal thread retracting mechanisms 430 respectively; through the arrangement of the synchronous gear 452, the rotating directions of the rotating parts 433 of the four internal thread retracting mechanisms 430 are the same.

[0085] In the embodiment, after the rotating motor 440 in the rotating mechanism is actuated, the relative rotation between the internal thread retracting mechanism 430 and the base 410 can be driven through the cooperation of the driving gear 441, the synchronous gear 452 and the driven gear 431, and the rotating part 433 can be driven to rotate; meanwhile, under the action of the reset part 462, the rotating part 433 moves away from the mold core, and the threaded end of the rotating part 433 is retracted from the internal thread of the molded part.

[0086] In summary, after the plastic part is molded, the rotating part 433 simultaneously performs horizontal movement and rotating movement under the action of the horizontal moving mechanism and the rotating mechanism, so that the threaded end of the rotating part 433 is retracted from the internal thread of the molded part; since the blocking strip 241 in the form of a ring is arranged in the molding cavity 700, the plastic part is blocked by the blocking strip 241, and the arc-shaped mold core 600 can automatically separate from the arc-shaped inner hole 14a of the plastic part through arc line movement, so that the plastic part with an arc-shaped inner hole and an internal thread can be automatically produced, the production efficiency is improved, and the manufacturing cost of the part is reduced.

[0087] The injection mold of the scheme is designed by using a gear transmission mechanism, and the simple, convenient and universal operation requirements can be fully considered; since the driving mechanisms of the arc core demolding device are designed into mechanical transmission structures, high professional skills are not required, and general on-site injection molding operators can easily install, skillfully debug and smoothly produce, which is beneficial to improving production efficiency.

[0088] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. Arc core stripping apparatus, characterized in that The utility model relates to a kind of moulding device, which includes: Rotary module (500) is arranged on mould; And Demoulding module (400) is movably connected on mould by support block (300), and demoulding module (400) is connected with the output end of the rotary module (500);The demoulding module (400) includes base (410), transverse mechanism movably connected on the base (410), rotating mechanism arranged on the base (410) and arc-shaped mould core (600);Retreating inner thread mechanism (430) is movably connected on the transverse mechanism, and the output end of rotating mechanism is connected with the retreating inner thread mechanism (430), to drive the threaded end of retreating inner thread mechanism (430) to retreat from the formed part;The end of arc-shaped mould core (600) away from its arc-shaped end (610) penetrates from the retreating inner thread mechanism (430) and is connected with the base (410), and the arc-shaped end (610) of arc-shaped mould core (600) is located on the side of the base (410) close to mould core;The rotary module (500) drives the demoulding module (400) to move along the curvature direction of arc-shaped mould core (600), so that the arc-shaped end (610) of arc-shaped mould core (600) retreats from the formed part.

2. The arc core stripping apparatus of claim 1, wherein: The rotary module (500) includes linear telescopic mechanism (510), rack (520) and transmission gear (530), the linear telescopic mechanism (510) is arranged on mould, and the telescopic end of linear telescopic mechanism (510) is connected with rack (520);Transmission gear (530) is rotatably connected on mould, and transmission gear (530) is engaged with rack (520);Transmission gear (530) is engaged with the arc-shaped tooth (420) arranged on the base (410).

3. The arc core stripping device of claim 1, wherein: The transverse mechanism includes first slider (450) and second slider (460), the first slider (450) is slidably arranged in the sliding groove (413) opened in the base (410), and the second slider (460) is connected with the first slider (450);The first slider (450) and the second slider (460) cooperatively form transmission cavity (451).

4. The arc core stripping device of claim 3, wherein: The second slider (460) is connected with one end of reset rod (461), the other end of reset rod (461) penetrates from the first via hole opened in the base (410) and extends to the side of the base (410) away from mould core, and reset member (462) is arranged between the other end of reset rod (461) and the base (410);Pushing space for inserting plug (160) is arranged between the second slider (460) and the base (410), and plug (160) is connected with mould; The insert block (160) is used to insert into the pushing space during the mold closing process of the front mold and the back mold, and the first slider (450) is moved to the direction of the mold core under the action of the insert block (160); the insert block (160) is pulled out from the pushing space during the mold opening process of the front mold and the back mold, and the first slider (450) is moved to the direction away from the mold core under the action of the reset member (462).

5. The arc core stripping device of claim 1, wherein: The internal thread retreat mechanism (430) comprises a rotating member (433) and a driven gear (431), The driven gear (431) is connected to one end of the rotating member (433), and the driven gear (431) is arranged in the transmission cavity (451); the other end of the rotating member (433) passes through the second through hole of the first slider (450) and extends to the side of the first slider (450) close to the mold core, and the other end of the rotating member (433) is provided with a thread (432); one end of the arc-shaped mold core (600) away from the arc-shaped end (610) is connected to the base (410), the arc-shaped mold core (600) passes through the third through hole of the rotating member (433), and the arc-shaped end (610) of the arc-shaped mold core (600) is located on the side of the first slider (450) close to the mold core.

6. The arc core stripping apparatus of claim 5, wherein: The two internal thread retreat mechanisms (430) are arranged equidistantly on the horizontal moving mechanism; the transmission cavity (451) is rotatably connected with a synchronous gear (452), and the synchronous gear (452) is meshed with the driven gears (431) of the two internal thread retreat mechanisms (430) respectively.

7. The arc core stripping device of claim 1, wherein: The rotating mechanism comprises a rotating motor (440) and a driving gear (441); the rotating motor (440) is connected to the base (410), and the output end of the rotating motor (440) is connected with the driving gear (441) through a transmission member; During the horizontal movement of the internal thread retreat mechanism (430), the driving gear (441) is always meshed with at least one driven gear (431) of the internal thread retreat mechanism (430).

8. The arc core stripping device of claim 1, wherein: The base (410) is provided with a guide protrusion (411), and the support block (300) is provided with a guide groove (310) matched with the guide protrusion (411); The guide protrusion (411) is assembled in the guide groove (310) to guide the movement of the demolding module (400) along the curvature direction of the arc-shaped mold core (600).

9. An injection mold characterized by: It comprises a front mold (100), a mold core, a back mold (200) and two arc core demolding devices of any one of claims 1-8; the front mold (100), the mold core and the back mold (200) are arranged in sequence from front to back, the mold core comprises a front mold core (140) and a back mold core (240), and the front mold core (140) and the back mold core (240) cooperate to form a molding cavity (700); the arc core demolding device is arranged on the back mold (200), and the two arc core demolding devices are arranged symmetrically on the two sides of the mold core.

10. The injection mold of claim 9, wherein: The positioning protrusion (141) is arranged in the forming cavity (700), and the arc-shaped end (610) of the arc-shaped mold core (600) is provided with a positioning groove (630) matched with the positioning protrusion (141); the blocking strip (241) in the annular shape is arranged in the forming cavity (700).

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