An inward-rotating slider mechanism and injection mold

Abstract

The present invention provides an inward-rotating slider mechanism and an injection mold. The inward-rotating slider mechanism includes a rotating ring, a pushing block, an inward-rotating driving assembly and an inward-rotating insert. The inward-rotating driving assembly is arranged on the outer side of the rotating ring. The two ends of the pushing block are respectively connected to the rotating ring and the inward-rotating driving assembly. The extension direction of the pushing block intersects with the driving direction of the inward-rotating driving assembly to form a preset angle. The inward-rotating driving assembly is driven by the pushing block to rotate around its own axial direction. The inward-rotating insert is arranged on the rotating ring. One end of the inward-rotating insert extends toward the center of the rotating ring. A protrusion is arranged at one end of the inward-rotating insert, and the protrusion extends along the rotation direction of the rotating ring. The injection mold includes an upper mold core, a lower mold core and an inward-rotating slider mechanism. A cavity is formed between the upper mold core and the lower mold core. The rotating ring of the inward-rotating slider mechanism is coaxially arranged on the outer side of the cavity. The protrusion of the inward-rotating insert extends into the cavity. The present invention has the advantages of simple structure, convenient operation and convenient demoulding.

Description

Technical Field

[0001] The invention relates to the field of injection molds, and in particular to an inward-rotating slider mechanism and an injection mold. Background Art

[0002] Some workpieces need to form at least one convex bridge on the inner side of the workpiece when the workpiece is formed due to the need for assembly or actual use, such as Figure 1 and Figure 2 The annular kit shown in the figure. The annular kit includes an inner ring and an outer ring, which are connected by a connecting ring. The convex bridge is arranged on the outer peripheral wall of the inner ring and hidden inside the outer ring. During injection molding, due to the structural limitation of the outer ring, it is difficult to demould the convex bridge. Therefore, it is necessary to develop an injection mold that can facilitate the molding and demoulding of the convex bridge. Summary of the invention

[0003] The first object of the present invention is to provide an inward-rotating slider mechanism which has a simple structure, is easy to operate and is easy to demould.

[0004] A second object of the present invention is to provide an injection mold comprising the above-mentioned inward-rotating slider mechanism.

[0005] In order to achieve the above-mentioned first purpose, the present invention provides an inward-rotating slider mechanism, comprising a rotating ring, a pushing block, an inward-rotating drive assembly and an inward-rotating insert. The inward-rotating drive assembly is arranged on the outside of the rotating ring, and the two ends of the pushing block are respectively connected to the rotating ring and the inward-rotating drive assembly. The extension direction of the pushing block intersects with the driving direction of the inward-rotating drive assembly to form a preset angle. The inward-rotating drive assembly is driven by the pushing block to rotate around its own axial direction. The inward-rotating insert is arranged on the rotating ring, and one end of the inward-rotating insert extends toward the center of the rotating ring. A protrusion is arranged at one end of the inward-rotating insert, and the protrusion extends along the rotation direction of the rotating ring.

[0006] It can be seen from the above scheme that by setting the inner rotating insert, the protrusion of the inner rotating insert extends into the cavity to form the convex bridge of the workpiece, and by setting the inner rotating insert on the rotating ring, when the inner rotating drive assembly is driven by the push block to rotate around its own axial direction, the inner rotating insert can rotate synchronously with the rotating ring in the same direction, so that the protrusion can be separated from the convex bridge along the circumference of the workpiece, which is convenient for the subsequent ejection of the entire workpiece. The present invention has the advantages of simple structure, convenient operation, and convenient demoulding.

[0007] A further solution is that a plurality of first rollers are provided on the peripheral wall of the rotating ring, the plurality of first rollers are arranged along the circumference of the rotating ring, the peripheral wall of the first rollers protrudes from the outer peripheral wall of the rotating ring, and the first rollers can rotate around their own axes relative to the rotating ring.

[0008] A further solution is that the inward rotation drive assembly includes a first outer sliding block and a first outer inclined guide rod, the first outer sliding block is hinged to one end of the pushing block, the first outer inclined guide rod extends obliquely along the axial direction of the rotating ring, the first outer inclined guide rod is movably connected to the first outer sliding block, and the first outer inclined guide rod can drive the first outer sliding block to move away from the rotating ring.

[0009] In order to achieve the above-mentioned second purpose, the present invention provides an injection mold, including an upper mold and a lower mold, the upper mold is provided with an upper mold core, the lower mold is provided with a lower mold core, a cavity is formed between the upper mold core and the lower mold core, the injection mold also includes the above-mentioned inward-rotating slider mechanism, the rotating ring of the inward-rotating slider mechanism is coaxially arranged on the outside of the cavity, the protrusion of the inward-rotating insert extends into the cavity, and the inward-rotating drive assembly is arranged on one side of the lower mold core.

[0010] A further solution is that the lower die core is provided with a central mounting groove, an outer annular groove and a plurality of outer arc-shaped fixing parts, the central mounting groove is coaxially arranged with the outer annular groove, the plurality of outer arc-shaped fixing parts are located between the central mounting groove and the outer annular groove, an outer slide groove is provided between two adjacent outer arc-shaped fixing parts, the outer slide groove is respectively connected with the central mounting groove and the outer annular groove, the rotating ring is rotatably provided in the outer annular groove, the inner rotating insert is provided in the outer slide groove, and the inner rotating insert can rotate around the center of the central mounting groove in the outer slide groove;

[0011] A plurality of outer arc-shaped sliders are also arranged in the outer slide groove. The plurality of outer arc-shaped fixing parts and the plurality of outer arc-shaped sliders enclose the outer peripheral wall of the cavity. The outer arc-shaped sliders can move axially along the central mounting groove. The outer arc-shaped sliders can be telescopically arranged on the rotation path of the inner rotating insert.

[0012] It can be seen from the above scheme that by setting a retractable and movable outer arc-shaped slider, when the mold is closed, the outer arc-shaped slider is extended to block the rotation of the inner rotating insert and the rotating ring; when the mold is opened, the outer arc-shaped slider is retracted to reserve space for the rotation of the inner rotating insert, so that the inner rotating insert can follow the rotating ring to rotate at a preset angle, so that the protrusion can be separated from the convex bridge of the workpiece.

[0013] A further solution is that a plurality of second rollers are provided at the bottom of the outer annular groove, and the plurality of second rollers are arranged along the circumference of the outer annular groove. The peripheral wall of the second roller protrudes from the bottom of the outer annular groove and is in line contact with the surface of the rotating ring. The axial direction of the second roller is parallel to the radial direction of the outer annular groove, and the second roller can rotate around its own axial direction.

[0014] A further solution is that a plurality of first inner sliders and a plurality of second inner sliders are arranged in the central installation groove, the first inner sliders and the second inner sliders are arranged at intervals along the circumferential direction of the central installation groove, the plurality of first inner sliders and the plurality of second inner sliders enclose the inner circumferential wall of the cavity, and an inner inclined sliding hole is arranged on one side of the first inner slider close to the center of the central installation groove, and the inner inclined sliding hole extends obliquely along the mold opening direction;

[0015] An upper ring groove, an upper fixing portion and an upper connecting seat are provided in the middle part of the upper mold core. The upper ring groove is coaxially arranged and connected with the cavity. The upper fixing portion protrudes from the center of the groove bottom of the upper ring groove toward the notch of the upper ring groove. The upper connecting seat is fixedly connected to the end of the upper fixing portion. The upper fixing portion and the upper connecting seat are both inserted into the inner circumferential wall of the cavity. The upper connecting seat is provided with a plurality of first inner inclined sliding rods. The first inner inclined sliding rods are arranged obliquely along the mold opening direction. The first inner inclined sliding rods are arranged one by one in correspondence with the first inner sliding block. The first inner inclined sliding rods are movably inserted in the corresponding inner inclined sliding holes. The first inner inclined sliding rods can drive the first inner sliding block to move toward the center of the central mounting groove.

[0016] It can be seen from the above scheme that by setting the first inner sliding block and the second inner sliding block to enclose the inner wall of the cavity, when opening the mold, the first inner sliding block is first driven to move toward the center by the first inner inclined sliding rod, so as to facilitate the first inner sliding block to detach from the workpiece and reserve sufficient moving space for the second inner sliding block.

[0017] A further solution is that one end of the second inner sliding block is connected to a second inner oblique sliding rod, the second inner oblique sliding rod extends obliquely along the mold opening direction, and the second inner oblique sliding rod can drive the second inner sliding block to move toward the center of the central mounting groove.

[0018] It can be seen from the above scheme that after the first inner slider moves toward the center, the second inner slider is driven to move toward the center, which facilitates the second inner slider to separate from the workpiece and facilitates the ejection of the workpiece.

[0019] A further solution is that a plurality of slide assemblies are further provided on the lower die core, and the plurality of slide assemblies are arranged along the circumference of the rotating ring;

[0020] The sliding assembly includes a second outer sliding block and a second outer inclined guide rod. The second outer sliding block is arranged corresponding to the outer arc-shaped fixing portion. One end of the second outer sliding block extends to the upper side of the outer arc-shaped fixing portion through the rotating ring. The end of the second outer sliding block extends into the mold cavity. The second outer inclined guide rod extends obliquely along the mold opening direction. The second outer inclined guide rod is movably connected to the second outer sliding block. The second outer inclined guide rod can drive the second outer sliding block to slide radially along the rotating ring.

[0021] A further solution is that the upper mold includes, from top to bottom, an upper fixed plate, a hot runner plate, a stripper plate and an upper mold plate, and the upper mold core is arranged on the upper mold plate; the lower mold includes, from top to bottom, a lower mold plate, a lower mold base, an upper ejector plate, a lower ejector plate and a lower fixed plate, and the lower mold core is arranged on the lower mold plate; the mold between the lower mold base and the lower mold plate is opened before the mold between the upper mold plate and the lower mold plate, and the mold between the lower mold base and the lower mold plate is closed later than the mold between the upper mold plate and the lower mold plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of a workpiece injection molded by an embodiment of the present invention from a first perspective.

[0023] Figure 2It is a structural diagram of a workpiece injection molded by an embodiment of the present invention from a second viewing angle.

[0024] Figure 3 It is a structural diagram of an embodiment of the present invention.

[0025] Figure 4 is a cross-sectional view of an embodiment of the present invention.

[0026] Figure 5 It is an exploded view of the core components of an embodiment of the present invention.

[0027] Figure 6 It is a cross-sectional view of the core component of an embodiment of the present invention.

[0028] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0029] Figure 8 It is an exploded view of the lower die core and the inward rotating slider assembly in an embodiment of the present invention.

[0030] Fig. 9 1 is a structural diagram of an outer arc-shaped slider limiting the rotation of a rotating ring in an embodiment of the present invention.

[0031] Fig.10 It is a structural diagram after the outer arc-shaped sliding block in the embodiment of the present invention moves downward.

[0032] Fig.11 It is a top view of the inward-rotating slider assembly and the lower mold core in an embodiment of the present invention.

[0033] Fig.12 yes Fig.11 Cross-sectional view at the middle BB.

[0034] Fig.13 yes Fig.12 Enlarged view of point C in the middle.

[0035] Fig.14 It is a top view of one of the acupuncture points in the embodiment of the present invention.

[0036] Fig.15 yes Fig.14 Cross-sectional view at DD in the middle.

[0037] Fig.16 1 is an exploded view of the first inner slider and the second inner slider in an embodiment of the present invention.

[0038] Fig.17 1 is a structural diagram of the upper mold core in an embodiment of the present invention.

[0039] Fig.18 is an exploded view of the lock assembly in an embodiment of the present invention.

[0040] Fig.19It is a schematic structural diagram of the slider assembly in the embodiment of the present invention.

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Specific embodiments

[0042] See Figure 1 and Figure 2 As shown in and, the workpiece 1 formed by injection molding in this embodiment is an annular kit, which includes an inner ring 11, an outer ring 12 and a connecting ring 13. The inner ring 11 and the outer ring 12 are coaxially arranged, and the connecting ring 13 is connected between the inner ring 11 and the outer ring 12. The lower end of the inner ring 11 protrudes from the end of the outer ring 12. There are eight rectangular through holes and eight kidney-shaped holes on the inner ring 11. The eight rectangular through holes are arranged at equal intervals along the circumferential direction of the inner ring 11, and the eight kidney-shaped holes are arranged at equal intervals along the circumferential direction of the inner ring 11. The rectangular through holes and the kidney-shaped holes are arranged along the axial direction of the inner ring 11. There are also two first convex bridges 111 and two second convex bridges 112 on the outer peripheral wall of the inner ring 11. The two first convex bridges 111 and the two second convex bridges 112 are arranged at intervals along the circumferential direction of the inner ring 11. The length of the first convex bridge 111 is shorter than that of the second convex bridge 112. There is a preset distance between the first convex bridge 111 and the bottom wall of the connecting ring 13 and between the second convex bridge 112 and the bottom wall of the connecting ring 13. That is, when injecting, inserts need to be set between the bottom wall of the connecting ring 13 and the convex bridges. Since both the first convex bridge 111 and the second convex bridge 112 are blocked by the outer ring 12, it is difficult for ordinary inserts to form these convex bridges, and even if they can be formed, it is difficult to demold smoothly.

[0043] The outer ring 12 is provided with two first chutes 121 and two second chutes 122. The two first chutes 121 and the two second chutes 122 are arranged at intervals along the circumferential direction of the outer ring 12. The extending directions of the two first chutes 121 and the two second chutes 122 are the same. The first chute 121 is located on one side of the first convex bridge 111, and the second chute 122 is located on one side of the second convex bridge 112. The groove wall of the first chute 121 is provided with hooks, and the groove wall of the second chute 122 is provided with ridges.

[0044] See Figures 3 to 8 As shown in, this embodiment provides an injection mold, which includes an upper mold and a lower mold. The upper mold successively includes an upper fixing plate 10, a hot runner plate 20, a stripper plate 30 and an upper template 40 from top to bottom. There are four upper mold cores 2 on the upper template 40, and the four upper mold cores 2 are arranged in a "field" shape. The lower mold successively includes a lower template 50, a lower mold base 60, an upper ejector plate 70, a lower ejector plate 80 and a lower fixing plate 90 from top to bottom. There are four lower mold cores 3 on the lower template 50. The lower mold cores 3 are arranged in one-to-one correspondence with the upper mold cores 2. A cavity matching the workpiece 1 is formed between the upper mold core 2 and the lower mold core 3. Two die angle plates are arranged between the lower mold base 60 and the lower fixing plate 90. Both the upper ejector plate 70 and the lower ejector plate 80 are located between the two die angle plates.

[0045] This embodiment has four acupuncture points, and the flow channels of the four acupuncture points are all connected to the injection port of the mold, that is, this embodiment can form four workpieces 1 at one time. The injection mold also includes four inward-rotating slider mechanisms 4, and each acupuncture point is provided with an inward-rotating slider mechanism 4.

[0046] See also Figures 8 to 13 , and combined with Figure 4 The inward-rotating slider mechanism 4 includes a rotating ring 41, a push block 42, an inward-rotating driving assembly 43 and four inward-rotating inserts 44. The rotating ring 41 is arranged on the lower mold core 3 and is located outside the cavity. The rotating ring 41 is arranged coaxially with the cavity. The four inward-rotating inserts 44 are evenly spaced on the rotating ring 41. The middle part of the inward-rotating insert 44 is fixedly connected to the rotating ring 41. One end of the inward-rotating insert 44 extends toward the center of the rotating ring 41. The end of the inward-rotating insert 44 extending toward the center of the rotating ring 41 is provided with a protrusion 441. The protrusion 441 extends along the rotation direction of the rotating ring 41. The protrusion 441 of the inward-rotating insert 44 extends into the cavity.

[0047] The inner rotation drive assembly 43 is arranged on the outer side of the rotating ring 41, that is, on one side of the lower mold core 3. The first end of the push block 42 is hinged to the rotating ring 41 through the first rotating shaft, and the second end of the push block 42 extends out of the lower mold core 3. The push block 42 is hinged to the inner rotation drive assembly 43 through the second rotating shaft. The first rotating shaft and the second rotating shaft are both parallel to the axial direction of the rotating ring 41. The inner rotation drive assembly 43 drives the rotating ring 41 to rotate around its own axial direction through the push block 42. Specifically, the inner rotation drive assembly 43 includes a first outer slider 431 and a first outer oblique guide rod 432. The first outer slider 431 is arranged on the lower mold plate 50. The first outer slider 431 is hinged to one end of the push block 42 away from the rotating ring 41. The upper part of the first outer oblique guide rod 432 is connected to the upper mold plate 40. The first outer oblique guide rod 432 extends obliquely along the axial direction of the rotating ring 41, that is, the first outer oblique guide rod 432 extends obliquely along the mold opening direction. The first outer oblique guide rod 432 is movably connected to the first outer slider 431. When the mold is opened, the upper mold plate 40 drives the first outer oblique guide rod 432 to move in the mold opening direction, and the first outer oblique guide rod 432 drives the first outer slide block 431 to move in the direction perpendicular to the mold opening direction, that is, to slide away from the rotating ring 41, so that the push block 42 pulls the rotating ring 41 to rotate. The extension direction of the push block 42 intersects with the driving direction of the inner rotation drive assembly 43 to form a preset angle, and the extension direction of the push block 42 cannot be parallel or perpendicular to the driving direction of the inner rotation drive assembly 43. The design of the angle should ensure that the push block 42 can pull the rotating ring 41 to rotate the necessary angle and reset.

[0048] When the mold is opened, the rotating ring 41 drives the internal rotating insert 44 to rotate counterclockwise under the drive of the internal rotating drive component 43, so that in the axial direction of the rotating ring 41, the protrusion 441 and the convex bridge are misaligned, which is convenient for the subsequent ejection of the workpiece 1 along the axial direction of the rotating ring 41; when the mold is closed, the internal rotating drive component 43 drives the rotating ring 41 in the reverse direction, and at the same time the rotating ring 41 drives the internal rotating insert 44 to rotate clockwise, so that the protrusion 441 is restored between the bottom wall of the connecting ring 13 and the convex bridge, which is used to form the convex bridge of the workpiece 1.

[0049] The lower die core 3 is provided with a central mounting groove 31, an outer annular groove 32 and four outer arc-shaped fixing parts 33. The central mounting groove 31 is coaxially arranged with the outer annular groove 32, and the outer annular groove 32 is located outside the central mounting groove 31. The four outer arc-shaped fixing parts 33 are evenly spaced and arranged on the circumference of the central mounting groove 31. The outer arc-shaped fixing parts 33 are located between the central mounting groove 31 and the outer annular groove 32. An outer slide groove 34 is formed between two adjacent outer arc-shaped fixing parts 33. The outer slide groove 34 penetrates the lower die core 3 along the mold opening direction, and the outer slide groove 34 is connected with the central mounting groove 31 and the outer annular groove 32 respectively. A step groove 341 is provided on one side of the outer arc-shaped fixing part 33 close to the outer slide groove 34, and the step groove 341 is connected with the central mounting groove 31 and the outer slide groove 34 at the same time. The protrusion 441 of the inner rotating insert 44 is matched and connected with the step groove 341, and the protrusion 441 and the step groove 341 jointly form the convex bridge of the workpiece 1. The rotating ring 41 is rotatably disposed in the outer annular groove 32 , the pushing block 42 is movably disposed in one of the outer slide grooves 34 , the inner rotating insert 44 is disposed in the corresponding outer slide groove 34 , and the inner rotating insert 44 can rotate around the center of the central mounting groove 31 in the outer slide groove 34 .

[0050] Each outer slide groove 34 is provided with an outer arc-shaped slider 5, which extends along the mold opening direction, and the four outer arc-shaped sliders 5 and the four outer arc-shaped fixing parts 33 enclose the outer peripheral wall of the mold cavity. The lower part of the outer arc-shaped slider 5 passes through the lower mold core 3, the lower mold plate 50 and is connected with the pad on the lower mold base 60. The outer arc-shaped slider 5 can slide along the axial direction of the central mounting groove 31, that is, the outer arc-shaped slider 5 can be telescopically movably arranged on the rotation path of the inner rotating insert 44. When the mold is closed, the outer arc-shaped slider 5 and the inner rotating insert 44 fill the entire outer slide groove 34, that is, the inner rotating insert 44 cannot move; when the mold is opened, the preset distance between the lower mold base 60 and the lower mold plate 50 is first opened, so that the outer arc-shaped slider 5 moves downward along the mold opening direction and leaves the rotation path of the inner rotating insert 44. At this time, the inner rotating drive assembly 43 can drive the rotating ring 41 to rotate; when the mold is closed, the rotating ring 41 needs to first drive the inner rotating insert 44 to reset, and then, while the lower mold base 60 and the lower mold plate 50 are closed, the outer arc-shaped slider 5 is driven to move upward along the mold opening direction until it is reset.

[0051] When opening the mold, in order to ensure that the mold between the lower mold base 60 and the lower mold plate 50 is opened before the mold between the upper mold plate 40 and the lower mold plate 50, four sets of locking components 8 are designed between the upper mold plate 40 and the lower mold plate 50. The four sets of locking components 8 are arranged on both sides of the injection mold, and the locking components 8 are connected between the upper mold plate 40 and the lower mold plate 50. Specifically, as Fig.18 As shown, the lock assembly 8 includes a locking seat 81 and a locking sleeve 82. The locking seat 81 is fixedly connected to the upper template 40. One end of the locking seat 81 is provided with a locking portion 811, and the left and right sides of the locking portion 811 are respectively provided with a clamping wheel 812. The locking sleeve 82 is fixedly connected to the lower template 50. The middle part of the locking sleeve 82 is provided with a locking groove 821, and the left and right inner walls of the locking groove 821 are respectively provided with an arc groove 822. The locking portion 811 is inserted into the locking groove 821, and the clamping wheel 812 is matched with the arc groove 822, so that the lock assembly 8 requires a large force to lock and open.

[0052] During mold closing, in order to ensure that the lower mold base 60 and the lower mold plate 50 are closed later than the upper mold plate 40 and the lower mold plate 50, two sets of slider assemblies are designed on the outer sides of the upper mold plate 40, the lower mold plate 50 and the lower mold base 60, and the two sets of slider assemblies 9 are respectively arranged on both sides of the injection mold. The slider assembly 9 is connected between the upper mold plate 40, the lower mold plate 50 and the lower mold base 60.

[0053] Specifically, Fig.19As shown, the slider assembly 9 includes a vertical slider 91, a limiting sleeve 92, a sliding seat 93, an elastic member 95 and a stopper 94. The first end of the vertical slider 91 is fixedly connected to the upper mold plate 40, and the second end of the vertical slider 91 is provided with a first inclined portion 911 and a second inclined portion 912, and the first inclined portion 911 and the second inclined portion 912 are respectively arranged on both sides of the vertical slider 91. The limiting sleeve 92 is fixedly connected to the outer side of the lower mold plate 50, and the sliding seat 93 is movably arranged on the lower mold base 60 and is located between the lower mold plate 50 and the lower mold base 60, and the sliding seat 93 can move along the vertical mold opening direction. The sliding seat 93 is set to be "L"-shaped, and the sliding seat 93 includes a vertically arranged vertical arm and a horizontal arm, and the vertical arm is arranged between the lower mold plate 50 and the lower mold base 60 along the mold opening direction. The side of the vertical arm away from the horizontal arm is provided with an elastic member installation groove, and the elastic member 95 is arranged in the elastic member installation groove, and the elastic member 95 applies an elastic force to move outward to the sliding seat 93. The cross arm extends to the outside of the mold along the vertical mold opening direction, and the cross arm part protrudes from the outer wall of the mold. A slide groove 931 is provided at one end of the cross arm protruding from the lower mold base 60, and the slide groove 931 extends obliquely along the mold opening direction. The second end of the vertical slide 91 passes downward through the limit sleeve 92 and is inserted into the slide groove 931. The first inclined surface 911 and the second inclined surface 912 are respectively connected with the groove walls on both sides of the slide groove 931 to drive the sliding seat 93 to move outward or inward. The stop block 94 is fixedly connected to the bottom of the lower mold plate 50 and is located in the moving direction of the sliding seat 93, that is, the stop block 94 is located on the outward side of the vertical arm, which plays a role in limiting the outward movement of the sliding seat 93.

[0054] Before mold closing, the sliding seat 93 is further extended out of the outer side of the lower mold base 60 under the action of the elastic member 95. At this time, the stop block 94 is located above the upper end surface 932 of the sliding seat 93, thereby preventing the lower mold base 60 and the lower mold plate 50 from being closed. At this time, the upper mold plate 40 and the lower mold plate 50 are closed first, so that the vertical sliding block 91 moves downward until the second inclined surface 912 of the vertical sliding block 91 forces the sliding seat 93 to move toward the center of the mold, so that the upper end surface 932 and the stop block 94 are misaligned in the mold closing direction, and the lower mold base 60 and the lower mold plate 50 can be closed.

[0055] Four first rollers 411 are arranged on the outer peripheral wall of the rotating ring 41. The four first rollers 411 are arranged along the circumference of the rotating ring 41. The first rollers 411 can rotate relative to the rotating ring 41 around their own axes. The peripheral wall of the first rollers 411 protrudes from the outer peripheral wall of the rotating ring 41 and is used to make linear contact with the groove wall of the outer annular groove 32. The arrangement of the first rollers 411 is conducive to reducing the friction between the rotating ring 41 and the groove wall of the outer annular groove 32, so that the rotating ring 41 can rotate smoothly and reduce the driving force required by the inner rotation driving assembly 43.

[0056] Seven second rollers 321 are arranged at the bottom of the outer annular groove 32. The seven second rollers 321 are arranged along the circumference of the outer annular groove 32. The axial direction of the second rollers 321 is parallel to the radial direction of the outer annular groove 32. The second rollers 321 can rotate relative to the outer annular groove 32 around their own axial direction. The peripheral wall portion of the second rollers 321 protrudes from the bottom of the outer annular groove 32, and is used to make line contact with the surface of the rotating ring 41. The provision of the second rollers 321 can reduce the friction between the rotating ring 41 and the bottom of the outer annular groove 32, and further improve the smoothness of the rotating ring 41.

[0057] Combination Figures 14 to 17 , and combined with Figure 4 and Figure 8 , four first inner sliders 6 and four second inner sliders 7 are arranged in the central mounting groove 31, and the first inner sliders 6 and the second inner sliders 7 are arranged at intervals along the circumferential direction of the central mounting groove 31. The first inner slider 6 is set to a trapezoidal structure with a narrow top and a wide bottom, and the second inner slider 7 is set to a trapezoidal structure with a wide top and a narrow bottom. When the mold is closed, the outer wall of the first inner slider 6 and the outer wall of the second inner slider 7 are located on the same circle, and the outer walls of the four first inner sliders 6 and the outer walls of the four second inner sliders 7 form the inner circumferential wall of the cavity. The lower part of the first inner slider 6 is provided with a sliding part 61, and the sliding part 61 is provided with an inner inclined sliding hole 611 and two guide parts 612. The inner inclined sliding hole 611 is located on the side close to the center of the central mounting groove 31, and the inner inclined sliding hole 611 extends obliquely along the mold opening direction. The two guide parts 612 are respectively arranged on both sides of the sliding part 61, and a supporting part 311 is arranged at the bottom of the central mounting groove 31. The supporting part 311 has a "cross" shaped guide groove 312. The four sliding parts 61 are respectively arranged in the four ends of the guide groove 312, and the guide part 612 is slidably connected with the guide groove 312.

[0058] An upper annular groove 21, an upper fixing portion 22 and an upper connecting seat 23 are provided in the middle of one side of the upper die core 2 facing the lower die core 3. The upper annular groove 21 is coaxially arranged and connected with the cavity. The upper fixing portion 22 protrudes from the center of the groove bottom of the upper annular groove 21 toward the notch of the upper annular groove 21. The upper fixing portion 22 is set as a cone with a larger upper portion and a narrower lower portion. The upper connecting seat 23 is fixedly connected to the end of the upper fixing portion 22. The upper fixing portion 22 and the upper connecting seat 23 are both inserted into the inner peripheral wall of the cavity, that is, located inside the first inner slider 6 and the second inner slider 7. The upper connecting seat 23 is provided with four first inner inclined slide bars 24, which are arranged obliquely along the mold opening direction, and are arranged one-to-one with the first inner slider 6. The first inner inclined slide bars 24 are movably inserted into the inner inclined slide hole 611. When the mold is opened, the upper mold core 2 drives the fixing part 22 and the upper connecting seat 23 to move upward. At this time, the first inner inclined slide rod 24 can drive the first inner slide block 6 to move toward the center of the central mounting groove 31, so that the first inner slide block 6 is first separated from the inner side wall of the inner ring 11 of the workpiece 1, so that the undercut part of the workpiece 1 on the first inner slide block 6 can be demolded.

[0059] The lower part of the second inner slider 7 is connected with the second inner oblique slide bar 71, which extends obliquely along the mold opening direction, and the lower part of the second inner oblique slide bar 71 passes through the lower mold core 3, the lower mold plate 50, and the lower mold base 60 to extend to the upper ejection plate 70. The lower ejection plate 80 is provided with an oblique slide bar base 801 extending along the mold opening direction, and the oblique slide bar base 801 passes upward through the upper ejection plate 70 and is connected to the inverted T-shaped slide groove of the second inner oblique slide bar 71. When the injection molding machine is ejecting, the ejector column 802 drives the lower ejection plate 80, the upper ejection plate 70 and the oblique slide bar base 801 to move upward, and the second inner oblique slide bar 71 drives the second inner slider 7 to move toward the center of the central mounting groove 31, so that the second inner slider 7 is separated from the inner side wall of the inner ring 11 of the workpiece 1.

[0060] Combination Figure 5 , Figure 6 , Figure 8 and Fig. 9 , four slide assemblies 35 are also arranged on the lower mold core 3, and the four slide assemblies 35 are arranged along the circumference of the rotating ring 41. The slide assembly 35 includes a second outer slider 351 and a second outer oblique guide rod 352. The second outer slider 351 is arranged corresponding to the outer arc-shaped fixing portion 33. The second outer slider 351 is arranged above the rotating ring 41. One end of the second outer slider 351 extends above the outer arc-shaped fixing portion 33 through the rotating ring 41, and the end of the second outer slider 351 extends into the mold cavity. The second outer oblique guide rod 352 extends obliquely along the mold opening direction. The first end of the second outer oblique guide rod 352 is fixedly connected to the upper mold core 2, and the second end of the second outer oblique guide rod 352 is movably connected to the second outer slider 351. When the mold is opened, the upper mold core 2 drives the second outer oblique guide rod 352 to move upward, and the second outer oblique guide rod 352 can drive the second outer slider 351 to move outward along the radial direction of the rotating ring 41, so that the second outer oblique guide rod 352 is separated from the outer ring 12 of the workpiece 1. Two of the second outer sliding blocks 351 are used to form the first sliding groove 121 of the workpiece 1 , and the other two second outer sliding blocks 351 are used to form the second sliding groove 122 of the workpiece 1 .

[0061] The glue inlet of this embodiment is arranged on the upper mold in the form of a hot runner to a fine sprue, and the glue inlet channel 100 passes through the upper mold plate 40 and the upper mold core 2 and is connected to the cavity.

[0062] In summary, the present invention provides an inner-spinning insert, the protrusion of which extends into the cavity to form a convex bridge of the workpiece, and the inner-spinning insert is provided on a rotating ring. When the inner-spinning drive assembly is driven to rotate around its own axial direction by the push block, the inner-spinning insert can rotate synchronously with the rotating ring in the same direction, so that the protrusion can be separated from the convex bridge along the circumference of the workpiece, which facilitates the subsequent ejection of the entire workpiece. The present invention has the advantages of simple structure, convenient operation, and convenient demoulding.

[0063] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An injection mold, comprising an upper mold and a lower mold, wherein the upper mold is provided with an upper mold core, and the lower mold is provided with a lower mold core, and a cavity is formed between the upper mold core and the lower mold core. Features: The lower mold core is provided with a central mounting groove, an outer annular groove and a plurality of outer arc-shaped fixing parts, the central mounting groove is coaxially arranged with the outer annular groove, the plurality of outer arc-shaped fixing parts are located between the central mounting groove and the outer annular groove, an outer sliding groove is provided between two adjacent outer arc-shaped fixing parts, and the outer sliding groove is communicated with the central mounting groove and the outer annular groove respectively; The injection mold further comprises an inward-rotating slider mechanism, which comprises a rotating ring, a pushing block, an inward-rotating driving assembly and an inward-rotating insert, wherein the inward-rotating driving assembly is arranged on the outer side of the rotating ring, and the two ends of the pushing block are respectively connected to the rotating ring and the inward-rotating driving assembly, and the extending direction of the pushing block intersects with the driving direction of the inward-rotating driving assembly to form a preset angle, and the inward-rotating driving assembly drives the rotating ring to rotate axially around itself through the pushing block, and the inward-rotating insert is arranged on the rotating ring, and one end of the inward-rotating insert extends toward the center of the rotating ring, and one end of the inward-rotating insert is provided with a protrusion, and the protrusion extends along the rotation direction of the rotating ring; The rotating ring is rotatably arranged in the outer annular groove, the inner rotating insert is arranged in the outer sliding groove, and the inner rotating insert can rotate around the center of the central mounting groove in the outer sliding groove; A plurality of outer arc-shaped sliding blocks are also arranged in the outer sliding groove. The plurality of outer arc-shaped fixing parts and the plurality of outer arc-shaped sliding blocks enclose the outer peripheral wall of the cavity. The outer arc-shaped sliding blocks can move axially along the central mounting groove. The outer arc-shaped sliding blocks can be telescopically arranged on the rotation path of the inner rotating insert.

2. The injection mold according to claim 1, Features: A plurality of first rollers are arranged on the peripheral wall of the rotating ring. The plurality of first rollers are arranged along the circumference of the rotating ring. The peripheral walls of the first rollers protrude from the outer peripheral wall of the rotating ring. The first rollers can rotate around their own axes relative to the rotating ring.

3. The injection mold according to claim 1, Features: The inward rotation drive assembly includes a first outer sliding block and a first outer inclined guide rod, the first outer sliding block is hinged to one end of the pushing block, the first outer inclined guide rod extends obliquely along the axial direction of the rotating ring, the first outer inclined guide rod is movably connected to the first outer sliding block, and the first outer inclined guide rod can drive the first outer sliding block to move away from the rotating ring.

4. The injection mold according to claim 1, Features: The rotating ring of the inner rotating slider mechanism is coaxially arranged on the outer side of the cavity, the protruding part of the inner rotating insert extends into the cavity, and the inner rotating drive assembly is arranged on one side of the lower mold core.

5. The injection mold according to claim 1, Features: A plurality of second rollers are provided at the bottom of the outer annular groove, and the plurality of second rollers are arranged along the circumference of the outer annular groove. The peripheral wall of the second roller protrudes from the bottom of the outer annular groove and is in line contact with the surface of the rotating ring. The axial direction of the second roller is parallel to the radial direction of the outer annular groove, and the second roller can rotate around its own axial direction.

6. The injection mold according to claim 1, Features: A plurality of first inner sliders and a plurality of second inner sliders are arranged in the central installation groove, the first inner sliders and the second inner sliders are arranged at intervals along the circumferential direction of the central installation groove, the plurality of first inner sliders and the plurality of second inner sliders enclose the inner circumferential wall of the cavity, an inner inclined sliding hole is arranged on one side of the first inner slider close to the center of the central installation groove, and the inner inclined sliding hole extends obliquely along the mold opening direction; An upper ring groove, an upper fixing portion and an upper connecting seat are provided in the middle portion of the upper mold core, the upper ring groove is coaxially arranged and connected with the cavity, the upper fixing portion protrudes from the groove bottom center of the upper ring groove toward the notch direction of the upper ring groove, the upper connecting seat is fixedly connected to the end portion of the upper fixing portion, the upper fixing portion and the upper connecting seat are both inserted into the inner circumferential wall of the cavity, the upper connecting seat is provided with a plurality of first inner oblique sliding rods, the first inner oblique sliding rods are arranged obliquely along the mold opening direction, the first inner oblique sliding rods are arranged in a one-to-one correspondence with the first inner sliding block, the first inner oblique sliding rods are movably inserted in the corresponding inner oblique sliding holes, and the first inner oblique sliding rods can drive the first inner sliding block to move toward the center of the central mounting groove.

7. The injection mold according to claim 6, Features: One end of the second inner sliding block is connected to a second inner oblique sliding rod, the second inner oblique sliding rod extends obliquely along the mold opening direction, and the second inner oblique sliding rod can drive the second inner sliding block to move toward the center of the central installation groove.

8. The injection mold according to claim 1, Features: The lower die core is also provided with a plurality of slide assemblies, and the plurality of slide assemblies are arranged along the circumference of the rotating ring; The sliding assembly includes a second outer sliding block and a second outer inclined guide rod, the second outer sliding block is arranged corresponding to the outer arc-shaped fixing portion, one end of the second outer sliding block extends above the outer arc-shaped fixing portion through the rotating ring, the end of the second outer sliding block extends into the mold cavity, the second outer inclined guide rod extends obliquely along the mold opening direction, the second outer inclined guide rod is movably connected to the second outer sliding block, and the second outer inclined guide rod can drive the second outer sliding block to slide radially along the rotating ring.

9. The injection mold according to claim 1, Features: The upper mold includes an upper fixing plate, a hot runner plate, a stripper plate and an upper mold plate from top to bottom, and the upper mold core is arranged on the upper mold plate; The lower mold includes a lower mold plate, a lower mold base, an upper ejector plate, a lower ejector plate and a lower fixing plate from top to bottom, and the lower mold core is arranged on the lower mold plate; The lower mold base and the lower mold plate are opened before the upper mold plate and the lower mold plate, and the lower mold base and the lower mold plate are closed after the upper mold plate and the lower mold plate.

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