CN113001894B - Injection mold and manufacturing method of rotating body - Google Patents

Injection mold and manufacturing method of rotating body Download PDF

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Publication number
CN113001894B
CN113001894B CN202110182067.1A CN202110182067A CN113001894B CN 113001894 B CN113001894 B CN 113001894B CN 202110182067 A CN202110182067 A CN 202110182067A CN 113001894 B CN113001894 B CN 113001894B
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China
Prior art keywords
core
sleeve
spiral
driving
forming
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CN202110182067.1A
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CN113001894A (en
Inventor
倪健
王秀君
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Suzhou Jinlaike Precision Mould Technology Co ltd
Kingclean Electric Co Ltd
Original Assignee
Suzhou Jinlaike Precision Mould Technology Co ltd
Kingclean Electric Co Ltd
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Priority to CN202110182067.1A priority Critical patent/CN113001894B/en
Publication of CN113001894A publication Critical patent/CN113001894A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/2602Mould construction elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/40Removing or ejecting moulded articles

Abstract

The invention discloses an injection mold and a manufacturing method of a rotating body. This injection mold is used for the hollow rotor of shaping, is provided with first helical structure on the outer wall of rotor, and first helical structure includes first spiral section and second spiral section, and injection mold includes: a mold body; the spiral forming mechanism is arranged on the die main body and comprises an outer die core and an inner die core, a first spiral forming structure is arranged on the outer die core and comprises a first forming section and a second forming section, the outer die core comprises a slide assembly and two outer die sleeves, and the slide assembly is positioned between the two outer die sleeves and can be respectively spliced with the two outer die sleeves; at least part of the first forming section is positioned on one of the outer core sleeves, and at least part of the second forming section is positioned on the other outer core sleeve; the driving mechanism can drive the two outer core sleeves to spirally move so as to be separated from the rotating body. The shape, number and parameters of the helical structure formed by the injection mold are not limited.

Description

Injection mold and manufacturing method of rotating body
Technical Field
The invention relates to the technical field of injection molding, in particular to an injection mold and a manufacturing method of a rotating body.
Background
The dust collector is a cleaning device which utilizes a motor to drive blades to rotate at a high speed and generates air negative pressure in a sealed shell to absorb dust. The rolling brush is arranged in the dust collector, and the rolling brush rotates to flap the ground to lift dust, so that the dust collection effect is improved.
The rolling brush comprises a rolling brush body and a cleaning piece. The rolling brush body is provided with a spiral structure such as a spirally extending convex rib or a groove for mounting a cleaning piece. The existing rolling brush body is generally of a solid structure, so that the rolling brush body is heavy, and energy consumption required by the rolling brush during rotation is large. Part of the rolling brush body is of a hollow structure and is molded through an injection molding process, but in order to simplify the mold structure and facilitate demolding, the shape and the number of the spiral structures arranged on the outer wall of the rolling brush body and the rotation angle around the axis of the rolling brush body are limited, and the cleaning effect of the rolling brush is influenced.
In addition, the existing spiral structure has constant parameters along the length direction, and the cleaning piece is single in arrangement, so that the cleaning effect of the rolling brush is not improved.
Therefore, an injection mold and a method for manufacturing a rotator are needed to solve the above problems.
Disclosure of Invention
The invention aims to provide an injection mold and a manufacturing method of a rotating body, which can solve the problem that the number and the shape of spiral structures and the rotating angle around the axis of a rolling brush body are limited, the rolling brush body has good strength and thinner wall thickness, is beneficial to reducing the energy consumption required by the rotation of the rolling brush body, and can process the spiral structures with variable parameters so as to better improve the cleaning effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an injection mold for the hollow rotor of shaping, be provided with first helical structure on the outer wall of rotor, first helical structure includes first spiral section and second spiral section, injection mold includes:
a mold body;
the spiral forming mechanism is arranged on the die main body and comprises an outer core and an inner core, when the outer core and the inner core are positioned at forming positions, the inner core penetrates through the outer core, at least part of forming cavities are formed between the outer core and the inner core, a first spiral forming structure for forming the first spiral structure is arranged on the outer core and comprises a first forming section and a second forming section, the outer core comprises a slide assembly and two outer core sleeves, the slide assembly is positioned between the two outer core sleeves and can be respectively spliced with the two outer core sleeves to form the outer contour surface of the rotor, and the slide assembly comprises at least two slide positions which are distributed along the circumferential direction of the rotor; at least a portion of said first mold segment is disposed on one of said outer jackets and at least a portion of said second mold segment is disposed on the other of said outer jackets;
and the driving mechanism is arranged on the die main body and used for driving the outer core and the inner core to be separated from the rotor respectively, wherein the driving mechanism can drive two of the outer cores to make spiral motion of the outer core sleeve so as to be separated from the rotor.
Wherein the first and second helical sections have different helical parameters, and the helical parameters include at least one of a pitch, a helix angle, and a helix direction.
Wherein, be provided with some the first shaping section and/or some the second shaping section on the capable position subassembly.
The driving mechanism comprises a first driving assembly and two transmission assemblies, the outer core sleeves and the transmission assemblies are arranged in a one-to-one correspondence mode, and the first driving assembly is used for driving the two transmission assemblies simultaneously so that the two outer core sleeves can perform spiral motion simultaneously to be separated from the rotating body.
Wherein, the transmission assembly includes:
fixing a bracket;
the movable support can move relative to the fixed support along the axial direction of the outer core sleeve;
the transmission sleeve is coaxially arranged and connected with the outer core sleeve, the transmission sleeve is rotatably connected with the movable support and is fixed with the movable support along the axial direction of the outer core sleeve, the transmission sleeve is arranged in the fixed support in a penetrating manner, one of the fixed support and the outer wall of the transmission sleeve is provided with a first guide part, the other one of the fixed support and the outer wall of the transmission sleeve is provided with a first spiral guide rail, and the first guide part is matched with the first spiral guide rail;
the first driving component is used for driving the movable support to move along the axial direction of the outer core sleeve.
The transmission sleeve comprises a cylindrical main body and a positioning ring arranged in the main body, the outer core and the inner core are positioned at a forming position, the positioning ring is abutted to the axial end face of the inner core, so that the end face of the main body, the positioning ring, the outer core and the inner core are surrounded to form the forming cavity.
The first driving assembly is used for driving the two movable supports to simultaneously move along the axis of the outer core sleeve in opposite directions.
Wherein the first drive assembly comprises:
the first driving piece is used for driving one of the two movable brackets to move;
the two movable supports are connected with the synchronous racks respectively;
and the synchronous gear is rotationally arranged on the die main body and is respectively meshed with the two synchronous racks.
Wherein, be provided with second helical structure on the inner wall of rotor, be provided with the shaping on the inner core the second helical forming structure of second helical structure, actuating mechanism can drive inner core screw motion is so that inner core moves to the shaping position or with the rotor breaks away from.
Wherein, the transmission assembly still includes:
and the transmission shaft penetrates through the transmission sleeve, the transmission shaft and the inner mold core are coaxially arranged and connected, one of the outer wall of the transmission shaft and the inner wall of the transmission sleeve is provided with a second guide part, the other one of the outer wall of the transmission shaft and the inner wall of the transmission sleeve is provided with a second spiral guide rail, and the second guide part is matched with the second spiral guide rail.
Wherein the hardness of the first guide is less than the hardness of the drive sleeve;
the hardness of the second guide is less than the hardness of the drive shaft and/or the drive sleeve.
The first spiral structure is a groove, the first spiral forming structure is a groove forming ridge, the groove forming ridge extends spirally around the axis of the outer core, the second spiral structure is a rib, the second spiral forming structure is a rib forming groove, and the rib forming groove extends spirally around the axis of the inner core.
Wherein the drive mechanism comprises:
and the second driving assembly can drive at least two row bits to approach or move away from each other.
The rotor is characterized in that the row position is provided with a forming surface for forming part of the outer contour surface of the rotor, and the forming surface is provided with a fixing bulge.
The fixing protrusions are arranged in a plurality, and the arrangement direction of the fixing protrusions is parallel to the extending direction of the first spiral structure.
And a pouring gate is enclosed between at least two rows, and a pouring runner is arranged on the end surface of the outer core sleeve.
The inner core comprises two inner core shafts which can be spliced along the axial direction, and the driving mechanism can drive the two inner core shafts to move towards the two axial ends of the rotating body simultaneously so as to be separated from the rotating body.
The connecting piece is arranged between the two inner core shafts, one end of the connecting piece is fixed to one of the two inner core shafts, and the other end of the connecting piece is connected with the other one of the two inner core shafts in a clamping or interference fit mode.
Wherein a cooling circulation passage is arranged in the inner core.
The cooling device comprises an inner core and an outer core, wherein a cooling groove extending along the axial direction is formed in the inner core, a cooling pipe penetrates through the cooling groove, the outer wall of the cooling pipe and the inner wall of the cooling groove are arranged at intervals, and a gap is formed between the cooling pipe and the end face of the cooling groove.
Wherein the outer core and the inner core are vertically disposed.
A manufacturing method of a rotating body is applied to an injection mold and used for forming the rotating body, wherein a first spiral structure is arranged on the outer wall of the rotating body and comprises a first spiral section and a second spiral section; the injection mold comprises a mold main body, a spiral forming mechanism and a driving mechanism; the spiral forming mechanism and the driving mechanism are arranged on the die main body; the spiral forming mechanism comprises an outer mold core and an inner mold core, when the inner mold core and the outer mold core are positioned at forming positions, the inner mold core is arranged in the outer mold core in a penetrating mode, at least part of forming cavities are formed between the outer mold core and the inner mold core, a first spiral forming structure for forming the first spiral structure is arranged on the outer mold core and comprises a first forming section and a second forming section, the outer mold core comprises a slide assembly and two outer core sleeves, the slide assembly is positioned between the two outer core sleeves and can be respectively spliced with the two outer core sleeves to form outer contour surfaces of the rotating body, and the slide assembly comprises at least two slide positions which are distributed along the circumferential direction of the rotating body; at least a portion of said first mold segment is disposed on one of said outer jackets and at least a portion of said second mold segment is disposed on the other of said outer jackets;
the manufacturing method of the rotating body comprises the following steps:
an injection molding step of injecting an injection molding material into the molding cavity to form the rotating body in the molding cavity;
a demoulding step, wherein the driving mechanism drives the outer core and the inner core to be separated from the rotating body respectively;
the demolding step comprises:
and demolding the outer core sleeves, wherein the driving mechanism drives the two outer core sleeves to spirally move around the axis of the rotor so as to respectively move towards the two axial ends of the rotor.
In the step of moulding plastics, when forming fashioned rotor in the shaping chamber, at least two slide centre gripping the rotor.
In the step of demoulding the outer core sleeves, the driving mechanism drives the two outer core sleeves to simultaneously perform spiral motion around the axis of the rotor.
The driving mechanism comprises a first driving assembly and two transmission assemblies, and the outer core sleeves and the transmission assemblies are arranged in a one-to-one correspondence manner;
the step of demoulding the outer core sleeve specifically comprises the step of driving the two transmission assemblies by the first driving assembly at the same time so that the two transmission assemblies respectively drive the corresponding outer core sleeve to do spiral motion so as to be separated from the rotor.
Wherein the step of demolding further comprises:
an inner core demoulding step, wherein the driving mechanism drives the inner core to be separated from the rotating body;
and a line position demoulding step, wherein the driving mechanism drives at least two line positions to be away from each other so as to be separated from the rotating body.
The inner wall of the rotating body is provided with a second spiral structure, and the inner core is provided with a second spiral forming structure for forming the second spiral structure;
the inner core demolding step specifically comprises the following steps:
the driving mechanism drives the inner core to perform spiral motion around the axis of the rotating body so as to be separated from the rotating body.
The inner core comprises two inner core shafts which can be spliced along the axial direction, and the inner core demoulding step specifically comprises the following steps:
the driving mechanism drives the two inner mandrels to simultaneously wind the axis of the rotating body in a spiral motion mode so as to respectively move towards the two axial ends of the rotating body.
In the demoulding step, after one of the outer core sleeve and the inner core shaft on the same side is driven by the driving mechanism to carry out spiral motion for a specified distance, the other of the outer core sleeve and the inner core shaft on the same side is driven to carry out spiral motion.
The driving mechanism comprises a fixed support, a movable support, a transmission sleeve and a first driving assembly, the transmission sleeve and the outer core sleeve are coaxially arranged and connected, the transmission sleeve is rotatably connected with the movable support and is fixed with the movable support along the axial direction of the outer core sleeve, the transmission sleeve is arranged in the fixed support in a penetrating manner, one of the fixed support and the outer wall of the transmission sleeve is provided with a first guide part, the other one of the fixed support and the outer wall of the transmission sleeve is provided with a first spiral guide rail, and the first guide part is matched with the first spiral guide rail;
the step of demoulding the outer core sleeve comprises the following steps:
the first driving assembly drives the movable support to move relative to the fixed support along the axial direction of the outer core sleeve so as to drive the outer core sleeve to spirally move around the axis of the rotor and separate from the rotor.
The driving mechanism further comprises a transmission shaft, the transmission shaft penetrates through the transmission sleeve, the transmission shaft and the inner core are coaxially arranged and connected, one of the outer wall of the transmission shaft and the inner wall of the transmission sleeve is provided with a second guide part, the other one of the outer wall of the transmission shaft and the inner wall of the transmission sleeve is provided with a second spiral guide rail, and the second guide part is matched with the second spiral guide rail; when the first driving assembly drives the movable support to move relative to the fixed support along the axial direction of the outer core sleeve, the second guide piece and the second spiral guide rail slide relatively;
the inner core demolding step comprises:
when the sliding motion of the second guide piece and the second spiral guide rail stops, the first driving assembly continues to drive the movable support to move relative to the fixed support along the axial direction of the outer core sleeve so as to drive the inner core to spirally move around the axis of the rotor so as to be separated from the rotor.
The manufacturing method of the rotating body further comprises a mold closing step before the injection molding step, wherein the mold closing step comprises the following steps:
the driving mechanism drives the outer core and the inner core to move to corresponding molding positions respectively, so that at least part of the molding cavity is formed between the outer core and the inner core.
The mold closing step specifically comprises the following steps:
a slide closing step, wherein the driving mechanism drives at least two slides to move to the forming positions;
an inner core closing step, wherein the driving mechanism drives the inner core to move to a forming position;
and an outer core sleeve mould matching step, wherein the driving mechanism drives the outer core sleeve to spirally move to a forming position of the outer core sleeve so as to be spliced with the slide to form the complete outer core and form at least part of the forming cavity with the inner core.
The driving mechanism comprises a fixed support, a movable support, a transmission sleeve and a first driving assembly, the transmission sleeve and the outer core sleeve are coaxially arranged and connected, the transmission sleeve is rotatably connected with the movable support and is fixed with the movable support along the axial direction of the outer core sleeve, the transmission sleeve is arranged in the fixed support in a penetrating manner, one of the fixed support and the outer wall of the transmission sleeve is provided with a first guide part, the other one of the fixed support and the outer wall of the transmission sleeve is provided with a first spiral guide rail, and the first guide part is matched with the first spiral guide rail;
the outer core sleeving step comprises:
the first driving assembly drives the movable support to move relative to the fixed support along the axial direction of the outer core sleeve so as to drive the outer core sleeve to spirally move around the axis of the rotor and move to the forming position of the rotor.
The driving mechanism further comprises a transmission shaft, the transmission shaft penetrates through the transmission sleeve, the transmission shaft and the inner core are coaxially arranged and connected, one of the outer wall of the transmission shaft and the inner wall of the transmission sleeve is provided with a second guide part, the other one of the outer wall of the transmission shaft and the inner wall of the transmission sleeve is provided with a second spiral guide rail, and the second guide part is matched with the second spiral guide rail; when the first driving assembly drives the movable support to move relative to the fixed support along the axial direction of the outer core sleeve, the second guide piece and the second spiral guide rail slide relatively;
the inner core die assembly step comprises:
when the sliding motion of the second guide piece and the second spiral guide rail is stopped, the first driving assembly continuously drives the movable support to move relative to the fixed support along the axial direction of the outer core sleeve so as to drive the inner core to spirally move around the axis of the rotor to move to the forming position of the inner core, and the axial movement in the mold closing step is opposite to the axial movement in the mold releasing step.
Has the advantages that: the invention provides an injection mold and a manufacturing method of a rotating body. The injection mold comprises an inner mold core and an outer mold core, and can form a hollow rotating body; the two outer core sleeves are respectively used for forming at least part of the first spiral section and the second spiral section, so that the first spiral section and the second spiral section with different parameters can be formed conveniently; the outer core sleeve is demolded in a spiral motion mode, so that the problem that the first spiral structure is limited by the existing demolding mode of the mold can be solved, the shape, the number and the parameters of the first spiral structure are not limited, and the first spiral structure can be set as required; the rotor passes through injection moulding, selects the material to be hard material for the intensity of rotor is good, and the size can be set for as required, and the wall thickness can be thinner.
During demolding, the molded rotor is clamped by at least two slide positions, and then the driving mechanism drives the inner core and the outer core sleeve to be separated from the rotor respectively, so that the rotor can be prevented from moving along with the outer core sleeve or the inner core sleeve during demolding; then two line positions are kept away from each other to take out the rotor, the drawing of patterns is convenient, need not to set up ejecting device, makes the simple structure of mould.
Drawings
FIG. 1 is a schematic structural view of a first kind of rolling brush body formed by an injection mold provided by the present invention;
FIG. 2 is a schematic structural view of a first type of roller brush body formed by the injection mold of the present invention after being assembled with a cleaning member;
FIG. 3 is a schematic view of a portion of the structure of an injection mold provided by the present invention;
FIG. 4 is a front view of the spiral forming mechanism provided by the present invention;
FIG. 5 is a schematic view showing a part of the structure of a screw forming mechanism according to the present invention;
FIG. 6 is a prior art mold;
FIG. 7 is a first schematic view of the limitation of the prior art roller brush body during demolding;
FIG. 8 is a second schematic view of the limitation of the conventional roller brush for molding during demolding;
FIG. 9 is a third schematic view of the limitation of the prior art roller brush body during demolding;
FIG. 10 is a fourth schematic view of the limitation of the prior art molded roller brush body in demolding;
fig. 11 is a first relation curve of < BAE and < GOD provided by the invention;
FIG. 12 is a first schematic view of a difficult-to-demold position in the roll brush body;
fig. 13 is a second relation curve of < BAE and < GOD provided by the invention;
FIG. 14 is a second schematic view of a hard-to-demold position in the roll brush body;
FIG. 15 is a schematic view of the spiral forming mechanism and the driving mechanism provided in the present invention;
FIG. 16 is a schematic structural view of a fixing bracket provided by the present invention;
FIG. 17 is a cross-sectional view of a spiral forming mechanism provided by the present invention;
FIG. 18 is a schematic diagram of a row bit structure provided by the present invention;
FIG. 19 is a schematic structural view of a first drive assembly provided by the present invention;
FIG. 20 is a schematic view of a portion of the spiral forming mechanism and the driving mechanism provided in the present invention;
FIG. 21 is a schematic structural view of a driving sleeve provided by the present invention;
FIG. 22 is a cross-sectional view of a drive sleeve provided by the present invention;
FIG. 23 is a schematic structural view of the outer core sleeve, inner core shaft and drive sleeve provided in accordance with the present invention in their mated configuration;
FIG. 24 is a schematic view of the configuration of the inner core shaft and connector provided by the present invention in engagement;
FIG. 25 is a schematic structural view of an outer core sleeve provided by the present invention;
FIG. 26 is a schematic structural view of another outer core sleeve provided by the present invention;
FIG. 27 is a cross-sectional view of an inner core provided by the present invention;
FIG. 28 is a schematic structural view of a second type of roll brush body formed by the injection mold according to the present invention;
FIG. 29 is a schematic structural view of a third roll brush body molded by an injection mold according to the present invention;
FIG. 30 is a schematic structural view of an outer core cover in a released state in an injection mold according to the present invention;
FIG. 31 is a schematic structural view of an outer core sleeve and an inner core shaft in a demolded state in an injection mold according to the present invention;
fig. 32 is a schematic structural view of an outer core sleeve, an inner core shaft and a slide assembly in a demolding state in the injection mold provided by the invention.
Wherein:
1. a mold body; 11. moving the mold; 12. fixing a mold; 2. a spiral forming mechanism; 21. an outer core; 211. an outer core sleeve; 2112. a second groove forming edge; 2113. a gate; 2114. pouring into a runner; 212. a row bit; 2121. molding surface; 2122. a fixed protrusion; 22. an inner core; 221. an inner mandrel; (ii) a 2212. A cooling tank; 23. a connecting member; 241. a cooling tube; 242. cooling the outer tube; 243. a first inner tube; 244. a second inner tube; 3. a drive mechanism; 31. fixing a bracket; 311. a base; 312. a frame body; 3121. a first guide member; 32. a movable support; 322. a bearing; 33. a transmission sleeve; 331. a main body; 3311. a sleeve body; 33111. a first helical guide; 3312. a shaft shoulder structure; 33121. a positioning projection; 332. a positioning ring; 3321. a second guide member; 333. a shaft sleeve; 34. a first drive assembly; 341. a first driving member; 342. a synchronous rack; 343. a synchronizing gear; 35. a drive shaft; 351. a second helical track;
200. a rolling brush body; 201. a barrel; 202. a first groove; 203. a first rib; 204. a second groove; 205. a second rib;
300. a cleaning member;
11', a moving die; 12', fixing the mold; 13', a core body.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
This embodiment provides an injection mold, can the hollow rotor of shaping, and all be provided with helical structure on the interior outer wall of the fashioned rotor. In this embodiment, the structure of the injection mold will be described by taking the molded rolling brush body 200 as an example.
As shown in fig. 1, the rolling brush body 200 includes a cylinder 201, a first spiral structure provided on an outer wall of the cylinder 201, which may be, but is not limited to, for mounting the cleaning member 300, and a second spiral structure provided on an inner wall of the cylinder. The first spiral structure corresponds to the second spiral structure in position, and the first spiral structure and the second spiral structure can both comprise grooves or ribs.
In order to avoid increasing the outer diameter of the rolling brush body 200 and facilitate cleaning of the rolling brush body 200, the first spiral structure is a groove, and the second spiral structure is a rib. In addition, through setting up the recess on the outer wall of barrel 201, there is protruding structure on the outer wall that can avoid barrel 201 on the one hand, lead to the junction butt joint dust of protruding structure and barrel 201 outer wall, on the other hand can also conveniently clear up the hair of winding outside barrel 201, when the hair winding is outside barrel 201, the hair corresponds the open-ended position of recess unsettled, conveniently cuts off the hair, avoids the hair to press close to barrel 201 completely and leads to the clearance difficulty.
Further, the groove corresponds to the rib in position and extends into the rib, so that the wall thickness of the rolling brush body 200 is approximately the same, the dynamic balance performance of the rolling brush body 200 in the rotating process is improved, and noise is avoided.
As shown in fig. 1-2, in the present embodiment, the cleaning member 300 is provided with two kinds, including a brush and a leather strip. To install both cleaning members 300, the first helical structure includes a first groove 202 and a second groove 204. The first groove 202 is used for planting hair to form a hair brush; the second groove 204 is used for clamping the cleaning element 300.
Specifically, as shown in fig. 3, the injection mold includes a mold main body 1, a screw forming mechanism 2, and a driving mechanism 3, and the driving mechanism 3 is used to drive the screw forming mechanism 2 to mold or to release a mold. The mould main part 1 includes movable mould 11 and cover half 12, and the injection molding machine includes feed mechanism, fixed lathe, activity lathe, and cover half 12 sets up on fixed lathe, and cover half 12 is connected with feed mechanism, and movable mould 11 sets up on the activity lathe, and spiral forming mechanism 2 and actuating mechanism 3 all set up on movable mould 11. The movable machine tool can move relative to the fixed machine tool to realize the die opening and die closing of the movable die 11 and the fixed die 12.
As shown in fig. 4 and 5, the screw forming mechanism 2 includes an inner core 22 and an outer core 21, and the inner core 22 is capable of being inserted into the outer core 21 and forms a forming cavity for forming at least part of the rotating body with the outer core 21. Wherein, the outer wall of the inner core 22 and the inner wall of the outer core 21 are both provided with spiral forming structures which are respectively used for forming the spiral structures on the inner wall and the outer wall of the rotating body. The driving mechanism 3 can drive the inner core 22 to be inserted into the outer core 21 to form at least a part of the molding cavity, and can drive the inner core 22 and the outer core 21 to be separated from the roll brush body 200, respectively, so as to take out the molded roll brush body 200.
It should be noted that, in the injection mold provided in this embodiment, the shape, number, size and arrangement position of the spiral forming structure can be set as required to form the rolling brush body 200 meeting the use requirement.
In this embodiment, the injection mold forms a closed annular molding cavity, and the molding cavity is an annular cavity by the sleeved outer core 21 and inner core 22, so that the hollow rolling brush body 200 can be molded, the energy consumption of the rolling brush body 200 during rotation can be reduced, and the processing cost of the rolling brush body 200 can be reduced; the spiral structures on the inner wall and the outer wall of the roller brush body 200 are processed through the spiral forming structures on the inner core 22 and the outer core 21, and the processing precision is high.
In the prior art, the roll brush body is generally formed by twisting after being extruded by an extrusion die. Specifically, the conventional roller brush body includes a solid shaft body and a mounting structure (a rib or a groove) provided on the shaft body and extending in an axial direction. After the shaft body and the mounting structure are formed through an extrusion process, opposite torques are applied to two ends of the shaft body, so that the shaft body drives the mounting structure to twist around the axis of the shaft body, and the mounting structure extends spirally.
In the forming process, the rolling brush body needs to be formed by twisting, and the material selected by the rolling brush body needs to have certain flexibility, so that the strength of the rolling brush body is insufficient, and the cleaning effect is influenced; in addition, in order to avoid excessive deformation of the rolling brush body during twisting, the shaft body can only be of a solid structure, and if the shaft body is a hollow cylinder body, the hollow cylinder body is easy to collapse in the twisting process, so that the hollow cylinder body is scrapped.
In addition, the outer diameter of the shaft body is generally small due to extrusion process limitations, and the produced roll brush body can be applied only to a small-sized dust collecting apparatus.
In the embodiment, an injection molding mode is adopted, so that on one hand, the selected material has high hardness and good strength, and the application range of a molded product is favorably improved; on the other hand, the injection molding quality is stable, and the machining error caused by the torsion error can be avoided, so that the machining precision of the rolling brush body 200 is improved. The rolling brush body 200 can be a hollow structure, so that not only can the cost be reduced, but also the energy consumption of the rolling brush body 200 during working can be reduced; the size of the injection molded rolling brush body 1 can be set according to actual needs, and the problem that the size of the rolling brush body 200 is limited is solved. Illustratively, the outer diameter of the cylinder 201 may be 40mm to 60mm, and specifically may be 40mm, 42mm, 45mm, 47mm, 49mm, 50mm, 52mm, 55mm, 57mm, 59mm, 60 mm.
In the prior art, the main reason why the injection molding of the rolling brush body 200 is not considered is that the existing mold structure has limitations on the shape of the spiral structure, the number of the spiral structures and the number of turns of the spiral structure around the axis of the cylinder, which results in poor cleaning effect after the molded rolling brush body is applied to the rolling brush.
As shown in fig. 6, the conventional injection mold includes a fixed mold 12 'and a movable mold 11', and after the fixed mold 12 'and the movable mold 11' are closed to each other, a molding cavity is formed therebetween. After the fixed die 12 'and the movable die 11' are far away from each other, the die is separated from the formed product. If the formed product comprises an inner hole, the injection mold also comprises a core body 13 ', and the core body 13' is arranged in the forming cavity and used for forming the inner hole; when demoulding, the core body 13' is drawn out along the axial direction of the inner hole to realize demoulding. The demolding direction of the movable mold 11 'is the direction departing from the fixed mold 12'.
When the traditional injection mold is adopted to form the rolling brush body, the number of the spiral structures positioned on the outer wall of the cylinder body generally cannot exceed two under the influence of the demolding direction of the fixed mold 12 'and the movable mold 11', and the number of turns of each spiral structure around the axis of the cylinder body cannot exceed half a turn, namely the rotation angle of the spiral structure around the axis of the cylinder body is less than 180 degrees. When the rolling brush body is applied, the cleaning piece on the rolling brush body has less times of beating the ground in unit time, and the effect of raising dust is poor, so that the dust collection effect is influenced; in addition, the contact area and the instantaneous acting force of the cleaning piece with the ground at each moment are large, particles on the ground are easy to pop up due to the acting force of the cleaning piece, and the large and hard particles easily bounce up to hurt a user or damage furniture.
In addition, the shape of the spiral structure on the outer wall of the cylinder body is also limited, for example, the spiral structure cannot be a shape with a closed opening and difficult demoulding, such as a T-shaped structure.
For convenience of explaining the rotation angle of the spiral structure around the axis of the cylinder 201, two ends of the spiral structure in the length direction thereof are respectively referred to as a first end and a second end, and since the shape of each section of the spiral structure is the same, the shape of the section of the rolling brush body 200 in any section perpendicular to the axis thereof is the same, and only the placement position of the section corresponding to the spiral structure along the circumferential direction of the cylinder 11 is different. On the projection plane perpendicular to the axis of the rolling brush body 200, the projection of the spiral structure is an arc line, and the center of the arc line is located on the axis of the cylinder 201. Taking any point of the first end of the spiral structure as a reference point, wherein in the process that the reference point moves from the first end to the second end in a spiral manner, a motion track formed by a projection point of the reference point on the projection surface is also an arc line, and the center of the arc line is located on the axis of the cylinder 11. The rotation angle around the center of the circle in the movement process of the projection point is the rotation angle of the spiral structure around the axis of the cylinder 201.
It will be appreciated that the above-mentioned angle of rotation is related to the number of turns of the helical structure around the cylinder 201, for example, if the helical structure makes one turn around the circumference of the cylinder 201, the angle of rotation is 360 degrees; if the helical structure makes half a turn around the circumference of the cylinder 201, the rotation angle is 180 degrees.
In the embodiment, the structure of the spiral forming mechanism 2 and the structure of the driving mechanism 3 are improved, the technical bias is overcome, the problems that the structure of the rolling brush body is limited and the demoulding is difficult to perform during injection are solved, the rolling brush is beneficial to the mass production of rolling bodies which are hollow and have spiral structures on the inner and outer walls, and the rolling brush has great economic significance.
Specifically, the inner wall of the outer core 21 is provided with a first spiral forming structure for forming the first spiral structure on the outer wall of the rolling brush body 200, and when the driving mechanism 3 drives the outer core 21 to be separated from the rolling brush body 200, at least part of the first spiral forming structure is separated from the rolling brush body 200 through a spiral motion, so that the limitation of the demoulding mode on the parameters of the first spiral structure is eliminated.
For the convenience of understanding the limitation of the existing mold to the spiral structure, the existing mold is described as an example of only providing the first groove 202 on the cylinder 201 to limit the number of the first grooves 202 and the rotation angle around the axis of the cylinder 201.
As shown in fig. 7 to 9, a cross section of the roll brush body 200 was selected for analysis. The circle O is the outer contour of the cylinder 201, the point O is the center of the outer circle of the cylinder 201, the first groove 202 is in an easy-demoulding shape, namely an open groove, the opening of the first groove 202 is gradually increased along the direction far away from the center of the circle, the first groove 202 is a circular arc-shaped groove, the circle O 'is the outer contour circle of the first groove 202, the point O' is located on the extension line of the radius of the circle O, the point B and the point C are two intersection points of the circle O 'and the circle O, and the connection line of the point O and the point O' intersects the circle O at the point G. The passing point B and the point C are tangent to a circle O ', which intersects the line OO' at the point A.
Then ≈ BAC is the bottom end included angle of the first groove 202, the line OD is the angle bisector of ═ BAC, and the line EF crosses the peak of ═ BAC and is parallel to the demolding direction X. The cross-section of the rolling brush body 200 at different positions is the same as that in fig. 7, and only the rotation angle of the cross-sectional profile of the first groove 202 with respect to the point of the circle O is different.
It should be noted that the shape of first groove 202 shown in fig. 7 to 8 is merely an example, and first groove 202 is not limited to this shape, and may be a shape in which a circle intersects a trapezoid, and in the case of a non-isosceles trapezoid, line AB and line AC may not be symmetrically disposed with respect to line OD.
Note that the cross section shown in fig. 7 is a section perpendicular to the axis of the cylinder 201.
When the movable die 11 is demolded in the direction X shown in the drawing, the cross section of the outer contour shown in fig. 7 is the cross section corresponding to the first end of the screw structure, and when the rotation angle of the screw structure around the axis of the cylinder 201 is not more than 90 degrees, in one case, as shown in fig. 7 and fig. 8, when the cross section central line AE is located within ═ BAC, the convex part of the die for molding the first groove 202 can be smoothly released from the first groove 202; in another case, when the cross-sectional centerline AE is located outside the ═ BAC, as shown in fig. 9, the convex portion forming the first groove 202 is restricted by the AB surface in the first groove 202 during demolding, and cannot be smoothly released from the first groove 202. The clockwise rotation angle is a positive angle, and the counterclockwise rotation angle is a negative angle.
When the section is rotated clockwise by an angle greater than 90 degrees and less than 180 degrees about the point O, as shown in fig. 10, the demolding direction X is opposite to the direction in fig. 7 and 8. In one case, when the cross-section central line AE is located within ≈ BAC, the convex portion of the first groove 202 formed on the outer core can be smoothly released from the first groove 202; in another case, as shown in fig. 10, when the cross-sectional centerline AE is outside the range of ≈ BAC, the convex portion forming the first groove 202 is restricted by the AC surface in the first groove 202 during demolding, and cannot be smoothly released from the first groove 202.
To more intuitively illustrate the specific location where the helical structure cannot be demolded during demolding, the present example was analyzed as follows.
According to the analysis, the key factor of whether demoulding can be carried out is the angle of ≈ BAE. The cross-sectional shape and size of the first groove 202 are not changed, namely ≈ BAC is taken as a fixed angle, a line OG passes through a circle center O and is parallel to a stripping direction X, and the following relation exists between izeand ≈ GOD:
when the clockwise rotation angle of the section around the point O is not more than 90 degrees, namely the angle GOD is not more than 90 degrees:
as shown in fig. 8 and 9, line OG is parallel to line FE, and therefore, angle GOD is angle EAD;
line OD is the angular bisector of < BAC, so that < BAD > is < BAC/2;
∠BAE=∠BAD-∠EAD=∠BAC/2-∠GOD;
when < BAE <0, the line EF is positioned outside < BAC, and the convex part for forming the first groove 202 cannot be demoulded.
When the clockwise rotation angle of the section around the point O is more than 90 degrees and less than 180 degrees, namely the < GOD is more than or equal to 90 degrees:
as shown in fig. 10, angle GOD is 180 ° -, angle DOH is 180 ° -, angle DAE;
∠BAE=∠BAD+∠DAE=∠BAC/2+180°-∠GOD;
when & lt BAE & gt & lt BAC, the line EF is positioned outside & lt BAC, and the convex part for forming the first groove 202 cannot be demoulded.
The relation curve of < BAE and < GOD can be drawn according to the above rule as shown in fig. 11, wherein the shaded part is the region which can not be demoulded.
It can be understood that the relationship of angle BAE and angle GOD is a periodic function with a period of 180.
From the above analysis, it can be known that, when the roller brush body 200 is produced by using the conventional mold, if the rotation angle of the cleaning member 300 around the axis of the cylinder 201 is not limited, the first groove 202 in the roller brush body 200 has a problem that the mold cannot be smoothly released at a partial position along the length direction of the roller brush body 200, as shown in fig. 12, the hatched portion is the mold-releasing-incapable position. Wherein, the surface a is the contact surface of the movable mold and the fixed mold, and the line b is a clamping line formed on the rolling brush body 200 and corresponding to the splicing position of the movable mold and the fixed mold.
When the number of the first grooves 202 is two, an included angle between first ends of the two first grooves 202 along the circumferential direction of the cylinder 11 is 180 degrees. A relation curve equivalent to ≦ BAE and ≦ GOD corresponding to the first groove 202 is shown in fig. 11 and is recorded as a first relation curve, a relation curve of ≦ BAE and ≦ GOD corresponding to the second first groove 202 is recorded as a second relation curve, the second relation curve has the same rule as the first relation curve, only the starting point is different, the starting point of the second relation curve is 180 °, that is, the second relation curve is the first relation curve and is translated to the right, and the unmoulded positions of the first relation curve and the second relation curve coincide.
When the number of the first grooves 202 is three, the included angle of the first ends of the three first grooves 202 along the circumferential direction of the cylinder 11 is 120 °, the relationship curve rules of · BAE and · GOD corresponding to the three first grooves 202 are the same, only the three first grooves 202 need to be shifted by 120 ° in sequence, and the corresponding curves are as shown in fig. 13. The solid line is a corresponding relation curve of the first groove 202, the dashed line is a corresponding relation curve of the second groove 202, and the two-dot chain line is a corresponding relation curve of the third groove 202. The positions of the three first grooves 202 corresponding to the positions where the mold cannot be ejected are not coincident.
In summary, it can be seen from the analysis that when the number of the first grooves 202 is at least three, there must be a portion of the first grooves 202 on the rolling brush body 1 corresponding to the position where the mold cannot be removed, and the number of the positions where the mold cannot be removed is more, as shown in fig. 14, the hatched portion is the position where the mold cannot be removed. In order to solve the above problems, in the prior art, a separate molding part is usually disposed at a position corresponding to a shadow portion of the roll brush body 200, the molding part is spliced and matched with a movable mold or a fixed mold to realize injection molding, and a demolding direction of the molding part is different from that of the movable mold or the fixed mold. Since the shadow part of the roll brush body 1 is discontinuous, a plurality of forming parts need to be added, which not only leads to a complicated mold structure, but also causes more lines on the formed roll brush body, which affects the appearance of the roll brush body.
It can be understood that, when the rolling brush body 200 is provided with the second groove 204 for clamping the cleaning element 300, the second groove 204 cannot be demolded in the existing demolding manner because the second groove 204 has the first width and the second width arranged from inside to outside along the radial direction of the cylinder 201, and the first width is greater than the second width.
As can be seen from the above analysis, in the present embodiment, the first spiral forming structure at least partially forming the first spiral structure is separated from the rolling brush body 200 by the spiral movement, the mold release direction is not limited by the number, shape and rotation angle of the spiral structure, and the formed rolling brush body 200 can better satisfy the dust removal and cleaning requirements.
Specifically, the outer core 21 is provided as a segmented structure including an outer core cover 211 and a slide assembly. At least part of the first spiral forming structure is disposed on the outer core cover 211, and the slide assembly is used for splicing with the end of the outer core cover 211 and forming a complete cylindrical structure, so as to form the outer contour surface of the rolling brush body 200. The row unit includes at least two rows 212 arranged along the circumference of the roller brush body 200. The driving mechanism 3 is used for driving the outer core sleeve 211 to be separated from the rolling brush body 200 in a spiral motion mode, and is used for driving at least two line positions 212 to be close to or far away from each other.
At the time of demolding, the slide assembly is kept stationary, thereby fixing the molded roll brush body 200 by the slide assembly, and then the driving mechanism 3 drives the inner core 22 and the outer core holder 211 to move to be separated from the roll brush body 200, wherein the outer core holder 211 is gradually separated from the roll brush body 200 by a spiral motion about the axis of the roll brush body 200.
After the inner core 22 and the outer core 211 are separated from the roller brush body 200, the driving mechanism 3 drives the slide assembly to separate from the roller brush body 200, thereby completing the demolding of the roller brush body 200.
In this embodiment, by providing the slide assembly, the roller brush body 200 can be kept stationary during the demolding movement of the inner core 22 and the outer core sleeve 211, so that the roller brush body 200 can move relative to the inner core 22 and the outer core sleeve 211, thereby ensuring the smooth demolding of the inner core 22 and the outer core sleeve 211.
It can be understood that, if the inner wall of the roller brush body 200 to be molded has no spiral structure, the inner core 22 may be demolded by moving in the axial direction of the roller brush body 200; if the inner wall of the roller brush body 200 to be molded has a spiral structure, the inner core 22 is the same as the outer core 211, and the demolding is realized by the spiral motion around the axis of the roller brush body 200.
Specifically, the row unit includes two rows 212 oppositely disposed, and the two rows 212 are arranged along a radial direction of the rolling brush body 200 and can be close to or far away from each other. The two line positions 212 can clamp and fix the rolling brush body 200 after being close to each other; the two row bits 212 are separated from the roller brush body 200 after being separated from each other.
After the inner core 22 and the outer core sleeve 211 are separated from the rolling brush body 200, the driving mechanism 3 drives the two slide positions 212 to be away from each other so as to loosen the rolling brush body 200, and the rolling brush body 200 is directly separated from the injection mold without arranging an ejection structure because the rolling brush body 200 does not have other positions connected with the injection mold, so that the demolding step is simplified, the demolding efficiency is improved, and the cost is reduced.
In other embodiments, three or more rows 212 may be provided in the row unit, as long as the rows 212 can be separated from the rolling brush body 200 by moving in a direction forming an angle with the axial direction of the rolling brush body 200. During demolding, the overall moving direction of the outer core sleeve 211 and the inner core 22 is parallel to the axial direction of the rolling brush body 200, and the moving direction (the direction indicated by the arrow in fig. 4) of the slide 212 during demolding forms an included angle with the axial direction, so that the axial movement of the rolling brush body 200 generated by the movement of the outer core sleeve 211 or the inner core 22 can be resisted, and the rolling brush body 200 is limited in the demolding process of the inner core 22 and the outer core sleeve 211.
In this embodiment, the outer core 21 is provided with a first groove forming ridge and a second groove forming ridge 2112, and the second groove 204 is not easy to be demolded in the existing demolding manner, and the second groove forming ridge 2112 is provided on the outer core sleeve 211; the first groove forming rib may be completely disposed on the outer core cover 211, or partially disposed on the outer core cover 211 and partially disposed on the slide 212.
For the convenience sets up the parameter of the different positions of first helical structure as required, first helical structure includes first spiral section and second spiral section, correspondingly, outer core 21 can include two outer core covers 211, and the line position subassembly sets up between two outer core covers 211, and can splice with two outer core covers 211 respectively to form complete outer core 21, thereby shaping brush body 200 outer profile face. The first spiral forming structure on the external core 21 comprises a first forming section and a second forming section, at least a part of the first forming section is positioned on one of the external core sleeves 211, at least a part of the second forming section is positioned on the other external core sleeve 211, and each external core sleeve 211 can spirally move around the axis of the cylinder 201 under the driving of the driving mechanism 3 so as to be separated from the cylinder 201.
Through setting up two outer core covers 211, be favorable to the first spiral section and the second spiral section of the different parameters of shaping for the installation of cleaning member is more nimble changeable, helps improving and cleans the effect.
Further, the driving mechanism 3 can respectively drive the two outer core sleeves 211 to spirally move towards the two axial ends of the cylinder 201, so that the two sides of the roller brush body 200 are demolded under the condition that the length of the roller brush body is not changed, and the demolding efficiency is improved.
Further, the spiral parameters of the partial first spiral forming structures on the two outer core sleeves 211 are different, that is, the spiral parameters of the first forming section and the second forming section are different, so as to form the first spiral structure with variable spiral parameters. Wherein the spiral parameter comprises at least one of a pitch, a spiral angle and a spiral direction.
In this embodiment, the spiral directions of the first spiral forming structures on the two outer core sleeves 211 are different, and the formed first spiral structure has two spiral sections with opposite spiral directions. The grooves on the surface of the rolling brush body 200 are formed in a V-shaped configuration by dividing the spiral structure of the formed rolling brush body 200 into two sections with opposite spirals. After the cleaning pieces are installed, the cleaning pieces are correspondingly arranged in a V shape, and on one hand, the arrangement can guide airflow to gather to the connecting position of the two sections of spiral structures, so that the gathering effect on dust is achieved, the raised dust is prevented from diffusing to the two axial ends of the rolling brush body 200, the secondary pollution to the dust collection surface is reduced, and the cleaning efficiency and the dust collection effect are improved; on the other hand, the bearing necrosis caused by the fact that dust, hair and other dust move to the two axial ends of the rolling brush body and enter the structures such as the bearing and the like can be avoided, and therefore the failure rate is reduced. Wherein, the connecting position of the two sections of spiral structures can correspond to the dust collecting opening of the rolling brush cavity in the floor brush, so as to improve the suction of dust into the dust collecting container.
Correspondingly, the outer core 21 is of a segmented structure, so that the outer contour surface of the formed rolling brush body 200 comprises a fixed section formed by the slide assembly and an extended section formed by the outer core sleeve 211, the fixed section is connected with the extended section, and a clamping line is formed at the connection position of the fixed section and the extended section.
It should be noted that the split line is a convex structure formed at the connection position of each adjacent spliced portion in the outer core 21, that is, a certain splicing gap exists between two adjacent spliced portions, which results in a residual splicing mark on a molded product.
It will be appreciated that the specific shape of the nip line on the roller brush body 200 is related to the splicing gap of the outer core 21.
In this embodiment, the shape of the clamping line is the same as the shape of the splicing seam between the slide assembly and the two outer core sleeves 211, referring to fig. 4, the clamping line includes a first line segment and a second line segment extending around the circumference of the cylinder 201, wherein the first line segment and the second line segment are arranged at an included angle, and the first line segment correspondingly formed by the outer core 21 shown in fig. 4 is parallel to the spiral direction of the spiral structure.
In some embodiments, at least two rows of the row position assembly may be spliced into a complete annular structure along the circumferential direction of the rolling brush body 200, and the corresponding first line segment is a splicing line of two adjacent rows, and the first line segment may, but is not limited to, extend along the axial direction of the rolling brush body 200 or be parallel to the spiral direction of the spiral structure.
It is understood that the specific shape of the clamping line and the position on the roll brush body 200 are related to the actual structure of the outer core 21, and the present embodiment exemplifies only one shape of the clamping line, but is not limited thereto. For example, the outer core 21 may be divided into a plurality of segments along the circumferential direction, the segments are connected in the circumferential direction, and the clamping line on the corresponding formed rolling brush body 200 extends along the axial direction of the rolling brush body 200, for example, the outer core 21 may be divided into a plurality of connected segments along the axial direction, each connected segment is divided into a plurality of sub-segments along the circumferential direction, and the clamping line on the corresponding formed rolling brush body 200 will extend partially along the axial direction and partially along the circumferential direction.
The driving mechanism 3 is provided on the movable die 11 of the die main body 1, the outer core 21 and the inner core 22 of the screw forming mechanism 2 are connected to the knock out structure 3, the screw forming mechanism 2 is provided on the movable die 11 of the die main body 1 through the driving mechanism 3, and further, the driving mechanism 3 can drive the outer core 21 and the inner core 22 to be separated from the brush roll 200, respectively. The following is a detailed description with reference to the drawings.
In this embodiment, as shown in fig. 15 and 16, the driving mechanism 3 includes a fixed bracket 31, a movable bracket 32, a transmission sleeve 33, and a first driving assembly 34. The fixed support 31 is arranged on the movable die 11, the movable support 32 can move along the axial line of the outer core sleeve 211 relative to the fixed support 31, the transmission sleeve 33 is coaxially arranged and connected with the outer core sleeve 211, the transmission sleeve 33 is rotatably connected with the movable support 32, the transmission sleeve 33 and the movable support 32 are fixed along the axial direction of the outer core sleeve 211, the transmission sleeve 33 is arranged in the fixed support 31 in a penetrating way, the fixed support 31 is internally provided with a first guide member 3121, the outer wall of the transmission sleeve 33 is provided with a first spiral guide rail 33111, and the first guide member 3121 is matched with the first spiral guide rail 33111; the first drive assembly 34 is used to drive the movable carriage 32 to move axially along the outer core 211.
In this embodiment, the first spiral guide 33111 is a spiral groove, and the first guide 3121 is a protrusion protruding from the fixing bracket 31. In some embodiments, the first spiral guide 33111 may be a raised slide rail, such as a T-rail, and the first guide 3121 is a slider structure that can mate with the slide rail.
In some embodiments, the first spiral guide 33111 may also be provided on the fixed bracket 31, and correspondingly, the first guide 3121 is provided on the driving sleeve 33.
When the first driving assembly 34 drives the movable bracket 32 to move along the axial direction of the outer core housing 211, the movable bracket 32 will drive the outer core housing 211 to move axially. Because of the cooperation of the first guide 3121 and the first spiral guide 33111 between the outer core sleeve 211 and the fixed bracket 31 to realize circumferential positioning, when the outer core sleeve 211 moves along the axis, the transmission sleeve 33 will slide relative to the fixed bracket 31, because of the sliding fit of the first spiral guide 33111 and the first guide 3121, under the effect of the abutment of the side wall of the first guide 3121 and the first spiral guide 33111, the transmission sleeve 33 will make spiral motion, that is, rotate around its own axis while moving along its axial direction, and further drive the outer core sleeve 211 to make spiral motion, thereby realizing the separation of the outer core sleeve 211 and the rolling brush body 200.
By arranging the fixed bracket 31 and the movable bracket 32, on one hand, the outer core sleeve 211 can be supported, and on the other hand, the linear motion output by the first driving assembly 34 can be converted into the axial movement and the rotary movement of the outer core sleeve 211, so that the structure is simple.
Optionally, the fixed bracket 31 includes a base 311 and a frame body 312, the base 311 is fixed on the movable mold 11, the transmission sleeve 33 is inserted into the frame body 312, the movable bracket 32 is connected with the base 311 through a guide assembly, and the guide assembly can guide the movable bracket 32 to move relative to the fixed bracket 31, so as to prevent the driving mechanism 3 from being stuck due to the deviation of the moving direction of the movable bracket 32.
Illustratively, the guiding component includes a sliding rail and a sliding block, the sliding rail is disposed on the base 311 and extends along the axial direction of the outer core sleeve 211, and the sliding block is fixed with the movable bracket 32 and is in sliding fit with the sliding rail, so as to perform a guiding function.
Illustratively, the guide assembly includes a guide rod disposed on the base 311 and extending along the axial direction of the outer core sleeve 211, and a guide member slidably sleeved on the guide rod and connected to the movable bracket 32, and the guide member and the guide rod slide to limit the moving direction of the movable bracket 32, thereby performing a guiding function.
Optionally, a mounting hole is formed in the movable support 32, and the transmission sleeve 33 is inserted into the mounting hole and is in clearance fit with the mounting hole, so that the transmission sleeve 33 can rotate relative to the movable support 32.
Further, as shown in fig. 17, a bearing 322 is disposed in the mounting hole, and the transmission sleeve 33 is fixed to an inner ring of the bearing 322, so as to reduce friction force applied to the transmission sleeve 33 when rotating, and ensure axial positioning of the transmission sleeve 33, thereby enabling the transmission sleeve 33 to rotate more smoothly.
In addition, the transmission sleeve 33 is respectively matched with the movable support 32 and the fixed support 31, and the limit action of the fixed support 31 and the movable support 32 on the transmission sleeve 33 can ensure that the extension direction of the central axis of the transmission sleeve 33 does not deviate in the moving process, ensure that the transmission sleeve 33 coaxially rotates in the whole moving process and ensure the movement precision.
Specifically, both ends of the mounting hole in the axial direction are provided with bearings 322. In this embodiment, the driving sleeve 33 is axially positioned by a bearing 322. In order to axially fix the bearing 322 and the movable support 32, the transmission sleeve 33 includes a main body 331 and a sleeve 333, the main body 331 includes a sleeve 3311 and a shoulder structure 3312 connected to one end of the sleeve 3311, the sleeve 333 is fixed on the sleeve 3311 by a fastener and spaced from the shoulder structure 3312, the bearing 322 at one end is clamped and fixed by the movable support 32 and the shoulder structure 3312, and the bearing 322 at the other end is clamped and fixed by the sleeve 333 and the movable support 32, so as to axially fix the movable support 32 and the transmission sleeve 33.
In this embodiment, the sleeve 3311 and the shoulder structure 3312 are an integral structure.
In order to reduce the tonnage of the injection mold, lightening holes can be arranged on the movable support 32 and the fixed support 31 so as to reduce the used materials and the weight and the cost.
In this embodiment, each outer core housing 211 is correspondingly provided with a fixed bracket 31, a movable bracket 32 and a transmission housing 33, and the two outer core housings 211 are separated from the roll brush body 200 in the same manner.
Further, the two outer core sleeves 211 can be demolded simultaneously, on one hand, the two outer core sleeves 211 respectively move towards the two axial ends of the rolling brush body 200 to be separated from the rolling brush body 200, so that the demolding stroke of each outer core sleeve 211 can be reduced, the demolding time is shortened, and the production efficiency is improved; on the other hand, the two outer core sleeves 211 have the same force and opposite directions to each other, so as to offset each other, thereby further preventing the rolling brush body 200 from moving and deforming.
Optionally, to further prevent the rolling brush body 200 from moving when the outer core 211 is removed from the mold, as shown in fig. 18, a forming surface 2121 is provided on the row 212, and a fixing protrusion 2122 is provided on the forming surface 2121. After the rolling brush body 200 is molded, a reference hole is molded on the surface of the rolling brush body 200 at a position corresponding to the fixing protrusion 2122; when the outer core 211 is removed from the mold, the fixing boss 2122 is positioned in the reference hole and can abut against the inner wall of the reference hole to restrict the movement of the roller brush body 200, thereby improving the fixing effect of the slide 212 to the roller brush body 200.
Further, since the molding surface 2121 needs to mold part of the outer contour surface of the rolling brush body 200, the molding surface 2121 has a curvature corresponding to the outer contour surface of the rolling brush body 200, and the molding surface 2121 covers the outside of the rolling brush body 200, which contributes to an improvement in the fixing effect of the row 212 to the rolling brush body 200.
Alternatively, the two outer core cases 211 may be driven by the same driving source, or may be driven by separate driving sources.
Further, in order to simplify the structure of the driving mechanism 3 and reduce the cost, in the present embodiment, both the outer core cases 211 are driven by the first driving assembly 34.
Specifically, as shown in fig. 19, the first driving assembly 34 includes a first driving member 341, a synchronizing rack 342 and a synchronizing gear 343, the first driving member 341 can drive one of the two movable brackets 32 to move along the axial direction of the rolling brush body 200, the synchronizing rack 342 is correspondingly connected to each movable bracket 32, the synchronizing rack 342 extends along the axial direction of the rolling brush body 200, the synchronizing gear 343 is rotatably disposed on the mold main body 1, and the synchronizing gear 343 is respectively engaged with the two synchronizing racks 342.
When the first driving member 341 drives one of the movable brackets 32 to move, the movable bracket 32 can drive the synchronous rack 342 connected thereto to move, and the synchronous rack 342 drives the synchronous gear 343 engaged therewith to rotate, so that the synchronous gear 343 rotates to drive the other synchronous rack 342 to move, thereby realizing the movement of the other movable bracket 32. In the process, the two synchronization racks 342 move in opposite directions to ensure that the two outer core sleeves 211 can simultaneously approach the slide assembly or simultaneously move away from the slide assembly.
Alternatively, two or more synchronizing gears 343 may be provided to provide a sufficient driving force for the driven of the other movable carrier 32.
In this embodiment, the first driving member 341 is a hydraulic cylinder, and the hydraulic cylinder has a large driving force, so as to meet the requirement of demolding.
In order to make the space available and to make the structure of the driving mechanism 3 more compact, the two synchronizing racks 342 are respectively disposed on opposite sides of the axis of the outer core 211, and the synchronizing gear 343 is located between the two synchronizing racks 342 and respectively engages with the two synchronizing racks 342.
In other embodiments, the first driving member 341 may be an air cylinder, a linear motor, or the like, as long as the linear movement of the movable bracket 32 can be achieved.
In other embodiments, the first driving assembly 34 may also be a screw nut assembly, wherein the screw has two threads with opposite spiral directions, two ends of the screw are respectively in threaded connection with the corresponding movable brackets 32, and the two movable brackets 32 can be moved close to or away from each other by the rotation of the screw.
Further, the driving mechanism 3 further comprises a second driving assembly, which can drive the two slide 212 to move close to and away from each other, so as to separate the slide assembly from the roller brush body 200.
Alternatively, the driving sleeve 33 and the outer core sleeve 211 may be an integral structure, or may be connected by a fastener such as a screw, as long as the driving sleeve 33 and the movable bracket 32 can cooperate to drive the outer core sleeve 211 to perform a spiral motion.
In order to improve the positioning accuracy of the driving sleeve 33 and the outer core sleeve 211, a plurality of positioning protrusions 33121 are arranged on the end surface of the driving sleeve 33, positioning concave parts are correspondingly arranged on the end surface of the outer core sleeve 211, and the positioning accuracy of the driving sleeve 33 and the outer core sleeve 211 is improved through the matching of the positioning protrusions 33121 and the positioning concave parts.
Optionally, the second driving assembly includes a second driving member, the second driving member outputs a linear motion, and a second driving member is correspondingly connected to each slide 212.
Alternatively, the second drive member may be a pneumatic cylinder, a hydraulic cylinder or a linear motor.
In this embodiment, the inner core 22 may be separated from the roll brush body 200 by a spiral motion. Since the inner core 22 is located inside the outer core 21, it is not convenient to connect an external driving mechanism, and for this reason, the inner core 22 is driven by the driving sleeve 33 to complete the demolding in this embodiment.
Specifically, as shown in fig. 20 and 21, the driving mechanism 3 further includes a transmission shaft 35, the transmission shaft 35 is inserted into the transmission sleeve 33, and the transmission shaft 35 is coaxially disposed and connected with the inner core 22. When the inner core 22 is moved into the outer core 21 and is in the molding position, the end faces of the drive shaft 35 and/or the drive sleeve 33 close off the axial ends of the annular space formed between the outer core 21 and the inner core 22 to form a closed molding cavity. In this embodiment, as shown in fig. 21 and 22, the driving sleeve 33 further includes a positioning ring 332, and the positioning ring 332 is disposed in the cylindrical main body 331 and is located at one axial end. When the inner core 22 moves into the outer core 21 and is located at the molding position, the positioning ring 332 abuts against the axial end face of the inner core 22, and the transmission shaft 35 penetrates through the positioning ring 332; the end surface of the outer core sleeve 211 may be connected with the end surface of the main body 331 or the positioning ring 332, so that the main body 331, the positioning ring 332, the outer core 21 and the inner core 22 enclose a complete forming cavity. The inner wall of the positioning ring 332 in the transmission sleeve 33 is provided with a second guide 3321, the outer wall of the transmission shaft 35 is provided with a second spiral guide 351, and the second guide 3321 is matched with the second spiral guide 351.
In this embodiment, the positioning ring 332 can serve to mount the second guide 3321 and to block the axial end face of the forming cavity. In other embodiments, the positioning ring 332 may be integrated with the outer core 21, and in this embodiment, in order to facilitate the processing of the outer core 21, the outer core sleeve 211, the main body 331 and the positioning ring 332 are designed separately. In other embodiments, the function of the positioning ring 332 for blocking the axial end face of the molding cavity is realized by the outer core sleeve 211, specifically, the outer core sleeve 211 comprises a blocking portion for blocking the axial end face of the molding cavity, one end of the blocking portion close to the inner core 22 abuts against the axial end face of the inner core 22, and the other end of the blocking portion far away from the inner core 22 abuts against the positioning ring 332; in this embodiment, a closed-end molding cavity is formed between the outer core 21 and the inner core 22.
In this embodiment, the second spiral guide 351 is a spiral groove, and the second guide 3321 is a convex structure protruding on the inner wall of the driving sleeve 33. In some embodiments, the second spiral guide 351 can be a raised sliding track, such as a T-shaped track, and the second guide 3321 can be a slider structure that can cooperate with the sliding track.
For convenience of description, an end of the second spiral guide 351 near the inner core 22 is referred to as a first end, and the opposite end is referred to as a second end. In the molding position, the inner core 22 is positioned within the outer core 21 and encloses a molding cavity, and the second guide 3321 is positioned at the first end of the second spiral guide 351.
After the rolling brush body 200 is formed, the outer core housing 211 starts to rotate relative to the rolling brush body 200 and moves away from the slide 212 in the axial direction, the second guide 3321 slides to the second end along the second spiral guide 351, at this time, because the second guide 3321 has movement in two directions of rotation around the axis of the inner core 22 and axial movement, the second guide 3321 is arranged on the transmission housing 33 and will make spiral movement along with the outer core housing 211, and the movement track thereof coincides with the second spiral guide, so that the second guide 3321 can smoothly slide along the second spiral guide 351, accordingly, when the second guide 322 slides along the second spiral guide 351, the position of the transmission shaft 35 does not change, the transmission shaft 35 is connected with the inner core 22, the inner core 22 is driven by the transmission shaft 35 to move, therefore, when the second guide 322 slides along the second spiral guide 351, the drive shaft 35 and the inner core 22 do not rotate or move relative to the roll brush body 200, and the inner core 22 maintains the engagement with the roll brush body 200.
When the second guide 3321 abuts against the second end of the second spiral guide track 351, the transmission sleeve 33 is still driven by the first driving assembly 34 to move continuously, the outer core sleeve 211 connected with the transmission sleeve 33 is driven by the transmission sleeve 33 to move continuously, the second guide 3321 of the transmission sleeve 33 drives the transmission shaft 35 to rotate and move axially by abutting against the second spiral guide track 351, and the rotation and axial movement of the transmission shaft 35 drive the inner core 22 to move spirally, so that the separation of the inner core 22 and the rolling brush body 200 is realized.
It should be noted that, in the formed rolling brush body 200 or other rotating bodies, the spiral parameters of the spiral structure on the outer wall thereof need to be the same as the spiral parameters of the spiral structure on the inner wall thereof, and the spiral parameters of the second spiral guide rail 351 are the same as the spiral parameters of the spiral structure, so that the second guide 3321 does not drive the inner core 22 to rotate during the process of screwing out the outer core sleeve 211. Wherein the spiral parameters include a pitch, a lead angle and a spiral direction. Specifically, the helical structure on the outer wall of the cylinder 201 and the helical structure on the inner wall thereof are both cylindrical helical structures, the same helical parameters are the pitch, the lead angle and the helical direction, and the cylindrical diameter and the helical length of the helical structure on the outer wall of the cylinder 201 and the helical structure on the inner wall thereof are different.
Further, the axial length of the first spiral guide 33111 along the cylinder 201 needs to be greater than the axial length of the second spiral guide 351 along the cylinder 201, so that when the first guide 3121 can slide continuously along the first spiral guide 33111, the second guide 3321 is already abutted against one end of the second spiral guide 351, so that the driving sleeve 33 can drive the outer core sleeve 211 to move spirally, and at the same time, the driving shaft 35 can drive the inner core shaft 221 to move spirally.
When the second guide 3321 abuts the second end of the second spiral guide 351, the outer core 211 may be completely separated from the drum brush body 200, or may still be partially engaged with the drum brush body 200.
In other embodiments, the second guide 3321 may be disposed on the transmission shaft 35, and correspondingly, the second spiral groove 351 is disposed on the transmission sleeve 33, which may also realize the demolding of the inner core 22.
In order to prevent the first guide member 3121 and the second guide member 3321 from scratching the driving sleeve 33 and the driving shaft 35, the hardness of the first guide member 3121 is less than that of the driving sleeve 33; the hardness of the second guide 3321 is less than the hardness of the drive shaft 35 and/or the drive sleeve 33.
Alternatively, the first guide 3121 and the second guide 3321 may be made of bronze material, which has a low hardness to prevent scratching of the driving shaft 35 and/or the driving sleeve 33 during the screwing motion.
In this embodiment, the inner core 22 includes two inner core shafts 221, each inner core shaft 221 is connected with a transmission shaft 35, and each transmission shaft 35 is matched with the transmission sleeve 33 on the corresponding side, so that the two inner core shafts 221 can move to two ends of the axis of the rolling brush body 200 respectively for demolding, the demolding stroke of each inner core shaft 221 can be reduced, the demolding time of the inner core 22 is shortened, and the production efficiency is improved.
In addition, the two inner mandrels 221 start to perform the spiral motion and the two inner mandrels 221 release the mold at the same time, and the force applied to the rolling brush body 200 by the two inner mandrels 221 has the same magnitude and opposite directions, so that the force can be mutually offset, and the movement of the rolling brush body 200 can be further avoided.
In the traditional mould, the demoulding direction of the mould is mostly vertical to the matching surface of the movable mould and the fixed mould, and the partial demoulding direction is parallel to the matching surface, so that the resistance received during demoulding is small. And the fixed die can not move due to the movement of the movable die. In this embodiment, because the outer core 21 is spirally engaged with the rolling brush body 200, the moving direction of the outer core 211 during the demolding process is always within the angle range parallel to the mating surface and perpendicular to the mating surface, the demolding force applied to the outer core 211 during the spiral separation from the rolling brush body 200 is relatively large, correspondingly, the reaction force applied to the rolling brush body 200 is relatively large, the two outer core sleeves 211 are simultaneously demolded, which may cause the risk of pulling off or deforming the rolling brush body 200, and because of the engagement between the transmission sleeve 33 and the transmission shaft 35, the outer core sleeve 211 and the inner core shaft 221 can successively and spirally move, and correspondingly, when the second guide 3321 has not yet moved to the second end of the second spiral guide 351, the inner core shaft 221 may move in advance due to the action of the second guide 3321 and the second spiral guide 351.
In order to solve the above problem, as shown in fig. 23, a connecting member 23 is disposed between the two inner mandrels 221, one end of the connecting member 23 is fixed to one of the two inner mandrels 221, and the other end is in snap fit or interference fit with the other of the two inner mandrels 221. Through setting up connecting piece 23, can exert the joining force that is close to each other to two inner core shafts 221, because of inner core shaft 221 and the round brush body 200 keep motionless, this joining force is equivalent to and is exerted at the axial both ends of round brush body 200, can balance the reaction force that the round brush body 200 received in the outer core cover 211 drawing of patterns in-process, can guarantee on the one hand that inner core shaft 221 and round brush body 200 do not move in the earlier stage of outer core cover 211 spiral motion, on the other hand can avoid round brush body 200 to be broken by the pulling.
Alternatively, the connecting member 23 and the inner spindle 221 may be clamped together by a nylon fastener connecting structure. Specifically, as shown in fig. 24, two opposite end surfaces of the inner mandrels 221 are respectively provided with a clamping hole, one end of the connecting member 23 is fixedly connected with the clamping hole on one side, and the other end of the connecting member 23 is clamped with the clamping hole on the other side. When the inner mandrels 221 at two sides respectively move spirally to two axial ends of the rolling brush body 200, two ends of the connecting piece 23 are pulled, and when the force applied to the connecting piece 23 is increased to a preset value, the connecting piece 23 is separated from the clamping hole matched with the clamping.
The spiral directions of the spiral structures on the rolling brush body 200 located at both sides of the central plane of the fixed section are opposite, wherein the central plane is a radial cross section perpendicular to the axial direction of the rolling brush body 200. Alternatively, the roll brush body 200 is symmetrical with respect to the center plane of the fixing section. Through setting up the round brush body 200 to symmetrical structure for revolve to the spiral angle of two opposite spiral bead 201 and equal, the size of two extension sections equals, and then makes two spiral bead 201 to the guide effect phase-matchs of air current, avoids the unbalanced air current disorder that leads to of atress.
In some embodiments, the rolling brush body 200 is located in the dust collection chamber of the floor brush, and because the dust collection port of the rolling brush is eccentric from the axial center of the rolling brush body 200, in order to ensure that the airflow can smoothly enter the dust collection port, two sections of spiral structures with opposite rotation directions on the rolling brush body 200 can also be asymmetrically arranged, so that the connection position of the two sections of spiral structures with opposite rotation directions is opposite to the dust collection port.
Referring to fig. 2, the cleaning member 300 may be a brush for cleaning a carpet or a leather strip for cleaning a floor. The brush includes a plurality of tufts of bristles, each tuft of bristles being fixed to the outer wall of the roll brush body 200 in a bristle-planting manner. To ensure the bristle planting depth, the second spiral structure of the inner wall of the barrel 201 includes a first rib 203, and the first rib 203 corresponds to the position of the first groove 202, so that each bristle can be planted in the first groove 202 deeply.
In order to form the first groove 202 and the first rib 203, a first groove forming edge is arranged on the outer core 21, a first rib forming groove is arranged on the outer wall of the inner mandrel 221, and the first rib forming groove and the first groove forming edge both extend spirally around the axis of the cylinder 201.
When the cleaning member 300 is provided as a leather strip or a single or single bristle, the cleaning member 300 cannot be fixed to the roller brush body 200 by means of tufting. When the single or the list of brush hair in the brush set up, the brush hair can be lamellar structure, also can be cylindric structure, because of single cylindric brush hair or the soft of single lamellar brush hair foot, adopts the fixed difficult operation of planting the hair, and the precision is relatively poor. For this reason, the brush further includes a mounting part on which a plurality of or more bristles are disposed, the mounting part being mounted on the barrel 201, thereby achieving fixation of the brush.
The brush and the leather strip with the structure can not be fixed in a hair planting mode, and the brush and the leather strip are generally connected in an injection molding mode or fixed in an adhesive bonding mode in the prior art. Because the cleaning member 300 has a certain flexibility and is made of a material different from that of the rolling brush body 200, when the cleaning member 300 is connected with the rolling brush body 200 by injection molding, the cleaning member 300 and the rolling brush body 200 need to be injection molded by a two-color mold, which results in higher cost. The adhesive fixing strength is poor, so that the cleaning piece 300 is easily separated from the rolling brush body 200, and the use experience of a user is influenced.
To solve the above problem, the cleaning member 300 may be engaged with the roller brush body 200. In this embodiment, the first spiral structure on the outer wall of the cylinder 201 further includes a second groove 204, and the second groove 204 can be engaged with a leather strip or a brush. The second groove 204 has a first width and a second width arranged from inside to outside in a radial direction of the cylinder 11, and the first width is greater than the second width. Through the arrangement, the structure in the second groove 204 can be prevented from being separated from the opening of the second groove 204, and the cleaning piece 300 is clamped with the second groove 204, so that the cleaning piece 300 and the second groove 204 are not required to be additionally provided with fasteners or adhesive for fixation, and the structure is simple.
In order to avoid increasing the wall thickness of the barrel 201 and ensuring the depth of the second groove 204, the second spiral structure on the inner wall of the barrel 201 further comprises a second rib 205, and the second rib 205 corresponds to the position of the second groove 204. It is understood that the outer core 21 and the inner core 22 are correspondingly provided with molding structures, and as shown in fig. 25, the inner wall of the outer core 21 is convexly provided with a second groove molding rib 2112 for molding the second groove 204.
The second groove 204 includes a first groove and a second groove which are communicated, and the first groove is positioned on one side of the second groove close to the axis of the cylinder 201. The cross-sectional shapes of the first groove and the second groove are both rectangular, the width of the first groove is kept constant along the radial direction of the cylinder 201, and the width of the second groove is kept constant along the radial direction of the cylinder 201. The width of the first groove body is a first width, the width of the second groove body is a second width, and the first width is larger than the second width, so that the opening of the second groove 204 is closed, and the cleaning piece 300 can be prevented from being separated from the second groove 204.
Alternatively, the groove 111 may have a multi-segment first groove body and/or a multi-segment second groove body.
It is understood that the width of the second groove 204 may be varied abruptly or gradually from the first width to the second width. When the width of the second groove 204 changes suddenly, the second groove 204 is divided into a plurality of sections along the radial direction of the cylinder 201, and a transition step surface is formed between the two adjacent sections, so that the cleaning piece 300 can be limited.
When the width of the second groove 204 changes gradually, the second groove 204 may be a dovetail groove, or the inner wall of the second groove 204 is an arc surface, so that the width of the second groove 204 decreases gradually along the radial direction of the cylinder 201, and the inner wall of the second groove 204 has a limiting effect on the cylinder 11, and can prevent the cleaning member 300 from coming out of the second groove 204.
It is understood that the shape of the second groove 204 is not limited to the above shape as long as the width of the second groove 204 is varied and the wider first width is located on the side of the narrower second width closer to the axis of the cylinder 201.
In this embodiment, the cross section of the second groove 204 may be T-shaped, and correspondingly, the cross section of the second groove forming rib 2112 is T-shaped.
When the rolling brush body 200 is demolded, the rolling brush body 200 needs to be separated from a pouring channel during injection molding, and in order to simplify the separation process of the rolling brush body 200 from the pouring channel, as shown in fig. 26, a pouring gate 2113 is enclosed between two slide positions 212, an end surface of one of the two outer core sleeves 211 is provided with a pouring channel 2114, and the pouring channel 2114 is respectively communicated with the pouring gate 2113 and a molding cavity.
After the rolling brush body 200 is molded, the casting material is solidified in the casting runner 2114, i.e. the casting runner, and the part of the casting material is embedded on the end surface of the outer core sleeve 211. When the outer core sleeve 211 is separated from the rolling brush body 200 through the spiral motion, the outer core sleeve 211 drives the pouring channel to perform the spiral motion together, so that the pouring channel is stressed to be disconnected from the sprue 2113 and the rolling brush body 200, the rolling brush body 200 is automatically separated from the pouring channel, additional shearing action is not required to be added, and the demolding step of the rolling brush body 200 is simplified.
In order to further shorten the molding cycle of the roller brush body 200, a cooling circulation path is provided in the screw molding mechanism 2, and the cooling molding of the injection molding material is accelerated by lowering the temperature in the cavity, thereby shortening the molding cycle of the roller brush body 200.
In this embodiment, the cooling circulation path is provided in the inner core 22, so that the structure of the screw forming mechanism 2 can be made more compact, and the cooling circulation path is prevented from interfering with the normal operation of other structures in the injection mold.
Specifically, as shown in fig. 27, a cooling groove 2212 extending in the axial direction is provided in the inner core 22, a cooling pipe 241 is inserted into the cooling groove 2212, the outer wall of the cooling pipe 241 is spaced apart from the inner wall of the cooling groove 2212, and a gap is provided between one end of the cooling pipe 241 close to the row 212 and the end face of the cooling groove 2212. The end of the cooling pipe 241 far from the row 212 is used for introducing a cooling medium, and the cooling medium flows to the end near the row 212 along the cooling pipe 241, enters between the cooling pipe 241 and the cooling groove 2212, and is discharged from the end of the cooling groove 2212 far from the row 212.
Optionally, a cooling outer tube 242 is further connected to the transmission shaft 35, a first inner tube 243 and a second inner tube 244 are arranged in the cooling outer tube 242 in a penetrating manner, the first inner tube 243 is communicated with the annular gap between the cooling tube 241 and the cooling groove 2212, and the second inner tube 244 is communicated with one end of the cooling tube 241 far away from the slide 212, so as to facilitate circulation of the cooling medium.
In other embodiments, the cooling medium may be introduced between the cooling pipe 241 and the cooling groove 2212 and discharged from the cooling pipe 241, so that the cooling of the inner core 22 may be achieved.
The mold body 1 further comprises an injection molding base, and the movable mold 11 and the fixed mold 12 are both arranged on the injection molding base. The injection molding base station is used as a supporting foundation for bearing other structures in the injection mold and is an important factor for determining the integral tonnage of the injection mold, and the tonnage of the injection mold is an important factor for determining the cost of the injection mold.
In order to reduce the manufacturing cost of the injection mold, in the embodiment, the outer mold core 21 and the inner mold core 22 are vertically arranged, so that the size of the injection molding base along the horizontal direction can be reduced, the tonnage of the injection mold is reduced, and the manufacturing cost of the injection mold is reduced.
It should be noted that the structure of the rolling brush body formed by the injection mold provided in this embodiment is not limited to that shown in fig. 1, and as shown in fig. 28 and 29, different rolling brush bodies can be obtained by changing the number, shape and spiral parameters of the first spiral forming structure on the outer core 21 and the second spiral structure on the inner core 22.
The production process of the injection mold provided by the embodiment is as follows:
1. and (5) closing the mold. The injection mold is closed, the slide 212 and the outer core sleeve 211 move to the respective forming positions to splice and form the complete outer core 21, and the inner core 22 moves to be inserted into the outer core 21 until the inner core 22 and the outer core 21 enclose at least part of the forming cavity, as shown in fig. 2. The forming cavity is closed and in fluid communication only with the feed inlet. In this state, the first guide 3121 is located at an end of the first spiral guide 33111 far from the slide 212, and the second guide 3321 is located at an end of the second spiral guide 351 near the slide 212.
2. And (5) injection molding. The injection molding material is injected into the cavity through the gate 2113, and the molding cavity is filled with the injection molding material.
3. And (5) demolding. After the injection molding material is solidified, a rolling brush body is formed in the molding cavity, the movable mold 11 and the fixed mold 12 are separated, and the driving mechanism 3 drives the outer mold core 212 and the inner mold core 22 to be separated from the rolling brush body 200 respectively.
The demolding step of the outer core sleeve 211 in the outer core, that is, the step of the driving mechanism 3 driving the outer core sleeve 211 in the outer core 21 to separate from the rolling brush body 200, includes that the first driving assembly 34 is started to drive the movable support 32 to move in the direction away from the slide 212, and the movable support 32 drives the transmission sleeve 33 to move synchronously; because the first guiding element 3121 on the fixed bracket 31 is fixed and is in sliding fit with the first spiral guiding rail 33111 on the driving sleeve 33, the first guiding element 3121 will abut against the side wall of the first spiral guiding rail 33111 and push the driving sleeve 33 to rotate relative to the movable bracket 32, so as to drive the outer core sleeve 211 to move spirally through the driving sleeve 33, thereby realizing the separation from the rolling brush body 200.
During the starting process of the first driving member 34, the outer core sleeves 211 on both sides are synchronously driven to perform spiral motion, so as to realize the mold release, as shown in fig. 30.
The inner core demolding step, i.e. the step of driving the inner core 22 to separate from the roller brush body 200 by the driving mechanism 3, includes: in the process of the spiral movement of the transmission sleeve 33, the second guide 3321 slides in the second spiral guide 351 due to the spiral movement of the outer core sleeve 211, and when the second guide 3321 moves to the end of the second spiral guide 351 away from the slide 212, the outer core sleeve 211 continues to spirally move under the driving of the transmission sleeve 33. At this time, the second guiding member 3321 abuts against the second spiral guiding rail 351 and pushes the transmission shaft 35 and the outer core sleeve 211 to perform spiral motion together, so as to drive the inner core shaft 221 to perform spiral motion, so that the inner core shaft 221 and the rolling brush body 200 are gradually separated; until the first guide member 3121 abuts against one end of the first spiral guide track 33111 near the slide 212 or the inner spindle 221 is completely separated from the rolling brush body 200, the first driving assembly 34 stops working, as shown in fig. 31;
the step of demoulding the slide assembly in the outer core 21, that is, the step of separating the slide assembly in the outer core 21 from the roller brush body 200 by the driving mechanism 3, includes: the second driving assembly is activated and drives the two row bits 212 away from each other to separate the roller brush body 200 from the row bit assembly, as shown in fig. 32.
It is understood that the moving direction of the outer core 21 and the inner core 22 in the mold clamping step is opposite to the moving direction in the mold releasing step, and the description thereof is omitted in this embodiment.
The embodiment also provides a manufacturing method of the rotator, which is applied to the injection mold so as to be used for molding the rotator. Be provided with first helical structure on the outer wall of rotor, first helical structure includes first spiral section and second spiral section, correspondingly, and outer core 21 among the injection mold is including going position subassembly and two outer core covers 211. The manufacturing method of the rotating body comprises the following steps:
injecting an injection molding material into the molding cavity to form a rotor in the molding cavity;
a demoulding step, in which the driving mechanism 3 drives the outer mold core 21 and the inner mold core 22 to respectively separate from the rotating body; wherein, the demoulding step comprises an outer core sleeve demoulding step, and the driving mechanism 3 drives the two outer core sleeves 211 to spirally move around the axial line of the rotor so as to respectively move towards the two axial ends of the rotor, thereby being separated from the rotor. The outer core sleeve 211 is separated from the rotor by a spiral motion to solve the limitation of the first spiral structure on the outer wall of the rotor by a demoulding mode. By arranging two outer core sleeves 211 to respectively form at least part of the first spiral section and at least part of the second spiral section, the first spiral section and the at least part of the second spiral section with different forming parameters are facilitated, and therefore the arrangement of the cleaning pieces 2 is more variable.
Further, in the injection molding step, the formed rotator is clamped by at least two slide 212, so that the rotator can be prevented from moving along with the outer core sleeve 211 or the inner core 22, and smooth demolding of the outer core sleeve 211 and the inner core 22 is ensured.
Further, in the process of demoulding the outer core sleeves, the driving mechanism 3 drives the two outer core sleeves 211 to simultaneously perform spiral motion around the axis of the rotor, so that the time required by demoulding the outer core 21 can be shortened on the basis of unchanging the length of the formed rotor, and the processing efficiency is improved.
Specifically, each outer core sleeve 211 is correspondingly connected with a transmission assembly, and the first driving assembly 34 simultaneously drives the two transmission assemblies, so that the two transmission assemblies respectively drive the corresponding outer core sleeve 211 to perform spiral motion to be separated from the rotating body.
Since the outer core 21 includes the outer core holder 211 and the slide assembly for being spliced with one end of the outer core holder 211, the demolding step includes an inner core demolding step and a slide demolding step. In the inner core demoulding step, the driving mechanism 3 drives the inner core 22 to be separated from the rotating body; in the slide demolding step, the driving mechanism 3 drives at least two slides 212 away from each other to disengage from the rotor.
Further, a second spiral structure is arranged on the inner wall of the rotating body, and a second spiral forming structure for forming the second spiral structure is correspondingly arranged on the inner core 22. In order to ensure smooth demolding of the inner core 22, in the inner core demolding step, the driving mechanism 3 drives the inner core 22 to spirally move around the axis of the rotor to be detached from the rotor. The inner core 22 is separated from the rotating body in a spiral mode, and the problem that the second spiral structure on the inner wall of the rotating body is limited by a demolding mode can be solved.
Further, the inner core 22 includes two inner mandrels 221 that can be spliced in the axial direction, and in the inner core demolding step, the driving mechanism 3 drives the two inner mandrels 221 to simultaneously perform spiral motion around the axis of the rotor so as to respectively move towards the two axial ends of the rotor. The two inner mandrels 221 are demolded simultaneously, so that the time required for demolding the inner core 22 can be shortened on the basis that the length of a formed rotating body is not changed, and the processing efficiency is improved.
Further, in the step of demolding, after one of the outer core sleeve 211 and the inner core shaft 221 on the same side is spirally moved for a specified distance, the other one of the outer core sleeve 211 and the inner core shaft 221 is driven to spirally move. The linkage of the outer core sleeve 211 and the inner core shaft 221 can simplify the structure of the driving mechanism 3 and reduce the manufacturing cost of the rotor.
In the driving mechanism 3, the fixed bracket 31 and the driving sleeve 33 are engaged with the first spiral guide 33111 via the first guide 3121 to perform a spiral movement of the outer core sleeve 211. In the outer core housing demolding step, the first driving assembly 34 drives the movable bracket 32 to move relative to the fixed bracket 31 along the axial direction of the outer core housing 211 so as to drive the outer core housing 211 to spirally move around the axis of the rotor so as to be separated from the rotor. The matching process among the movable bracket 32, the fixed bracket 31 and the outer core holder 211 can be referred to the production process of the injection mold, and is not described in detail herein.
Further, in the driving mechanism 3, the transmission shaft 35 and the transmission sleeve 33 are matched with the second spiral guide rail 351 through the second guide part 3321, so that the linkage between the outer core sleeve 211 and the inner core shaft 221 is realized. In the inner core demolding step, when the sliding movement of the second guide 3321 and the second spiral guide 351 is stopped, the first driving assembly 34 continues to drive the movable support 32 to move relative to the fixed support 31 along the axial direction of the outer core housing 211, so as to drive the inner core 22 to spirally move around the axis of the rotor to be disengaged from the rotor.
In this embodiment, the method for manufacturing the rotor further includes a mold closing step, and the mold closing step is performed before the injection molding step. In the mold clamping step, the driving mechanism 3 drives the outer core 21 and the inner core 22 to move to the corresponding molding positions, respectively, so that at least part of the molding cavity is formed between the outer core 21 and the inner core 22.
Specifically, the injection mold comprises an outer mold core 21 and an inner mold core 22, the outer mold core 21 is of a splicing structure, and the mold closing step specifically comprises a slide mold closing step, an inner mold core closing step and an outer core sleeving step. In the line clamping step, the driving mechanism 3 drives at least two line positions 212 to move to the forming positions; in the inner core mold closing step, the driving mechanism 3 drives the inner core 22 to move to the molding position thereof; in the outer core sleeve molding step, the driving mechanism 3 drives the outer core sleeve 211 to move spirally to its molding position so as to splice with the slide 212 to form the complete outer core 21 and form at least part of the molding cavity with the inner core 22.
In conjunction with the specific structure of the driving mechanism 3, in the outer core sleeving and clamping step, the first driving assembly 34 drives the movable bracket 32 to move relative to the fixed bracket 31 along the axial direction of the outer core sleeve 211, so as to drive the outer core sleeve 211 to move spirally around the axis of the rotor to move to the forming position.
When the sliding motion of the second guide 3321 and the second spiral guide 351 stops in the mold clamping step of the inner core, the first driving assembly 34 continues to drive the movable support 32 to move axially relative to the fixed support 31 along the outer core sleeve 211 so as to drive the inner core 22 to move spirally around the axis of the rotor to the molding position, and the axial movement in the mold clamping step is opposite to the axial movement in the mold stripping step.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (35)

1. The utility model provides an injection mold for the rotor of shaping hollow, its characterized in that, be provided with first helical structure on the outer wall of rotor, first helical structure includes first spiral section and second spiral section, injection mold includes:
a mold main body (1);
the spiral forming mechanism (2) is arranged on the die main body (1), the spiral forming mechanism (2) comprises an outer die core (21) and an inner die core (22), when the outer die core (21) and the inner die core (22) are positioned at forming positions, the inner die core (22) penetrates through the outer die core (21), at least part of forming cavities are formed between the outer die core (21) and the inner die core (22), a first spiral forming structure for forming the first spiral structure is arranged on the outer die core (21), the first spiral forming structure comprises a first forming section and a second forming section, the outer die core (21) comprises a slide assembly and two outer die sleeves (211), the slide assembly is positioned between the two outer die sleeves (211) and can be respectively spliced with the two outer die sleeves (211) to form the profile surface of the rotating body, the line position assembly comprises at least two line positions (212) arranged along the circumferential direction of the rotating body; at least a portion of said first mold segment is positioned on one of said outer core sleeves (211) and at least a portion of said second mold segment is positioned on the other of said outer core sleeves (211);
and the driving mechanism (3) is arranged on the die main body (1) and is used for driving the outer core (21) and the inner core (22) to be separated from the rotating body respectively, wherein the driving mechanism (3) can drive two of the outer cores (21) and the outer core sleeve (211) to perform spiral motion so as to be separated from the rotating body.
2. The injection mold of claim 1, wherein the first helical segment and the second helical segment differ in helical parameters including at least one of a pitch, a helix angle, and a helix direction.
3. An injection mold according to claim 1, wherein part of the first and/or part of the second mold section is provided on the slide assembly.
4. An injection mold according to claim 1, wherein said driving mechanism (3) comprises a first driving assembly (34) and two transmission assemblies, said outer core housings (211) being disposed in one-to-one correspondence with said transmission assemblies, said first driving assembly (34) being adapted to simultaneously drive said two transmission assemblies so as to simultaneously screw-move said two outer core housings (211) to disengage from said rotating body.
5. The injection mold of claim 4, wherein the transmission assembly comprises:
a fixed bracket (31);
a movable bracket (32) capable of moving along the axial direction of the outer core sleeve (211) relative to the fixed bracket (31);
the transmission sleeve (33) is coaxially arranged and connected with the outer core sleeve (211), the transmission sleeve (33) is rotatably connected with the movable support (32) and is fixed with the movable support (32) along the axial direction of the outer core sleeve (211), the transmission sleeve (33) is arranged in the fixed support (31) in a penetrating way, one of the outer walls of the fixed support (31) and the transmission sleeve (33) is provided with a first guide part (3121), the other one of the outer walls of the fixed support and the transmission sleeve (33) is provided with a first spiral guide rail (33111), and the first guide part (3121) is matched with the first spiral guide rail (33111);
the first driving component (34) is used for driving the movable bracket (32) to move along the axial direction of the outer core sleeve (211).
6. An injection mould according to claim 5, characterized in that the driving sleeve (33) comprises a cylindrical main body (331) and a positioning ring (332) arranged inside the main body (331), the positioning ring (332) abutting an axial end face of the inner core (22) when the outer core (21) and the inner core (22) are in the moulding position, so that the end face of the main body (331), the positioning ring (332), the outer core (21) and the inner core (22) enclose the moulding cavity.
7. An injection mould according to claim 5, characterized in that said first drive assembly (34) is adapted to drive both said movable supports (32) simultaneously in opposite directions along the axis of said outer core sleeve (211).
8. An injection mould as claimed in claim 7, characterized in that said first drive assembly (34) comprises:
a first driving member (341) for driving one of the two movable brackets (32) to move;
the two synchronous racks (342), the two movable brackets (32) are connected with the synchronous racks (342);
and the synchronous gear (343) is rotatably arranged on the die main body (1), and the synchronous gear (343) is respectively meshed with the two synchronous racks (342).
9. An injection mould according to claim 5, characterised in that a second helical formation is provided on the inner wall of the rotor, a second helical formation for forming the second helical formation is provided on the inner core (22), and the drive mechanism (3) is capable of driving the inner core (22) in a helical movement to move the inner core (22) to or from the forming position.
10. The injection mold of claim 9, wherein the drive assembly further comprises:
the transmission shaft (35) penetrates through the transmission sleeve (33), the transmission shaft (35) and the inner core (22) are coaxially arranged and connected, one of the outer wall of the transmission shaft (35) and the inner wall of the transmission sleeve (33) is provided with a second guide piece (3321), the other one of the outer wall of the transmission shaft and the inner wall of the transmission sleeve (33) is provided with a second spiral guide rail (351), and the second guide piece (3321) is matched with the second spiral guide rail (351).
11. An injection mould according to claim 10, characterized in that the hardness of the first guide member (3121) is less than the hardness of the drive sleeve (33);
the hardness of the second guide (3321) is less than the hardness of the drive shaft (35) and/or the drive sleeve (33).
12. An injection mould according to claim 9, wherein the first helical formation is a groove and the first helical formation is a groove-forming ridge extending helically around the axis of the outer core (21), and the second helical formation is a rib-forming groove extending helically around the axis of the inner core (22).
13. An injection mould according to any one of claims 1-12, characterized in that the drive mechanism (3) comprises:
a second drive assembly capable of driving at least two of the row bits (212) toward or away from each other.
14. An injection mould according to any one of claims 1-12, characterized in that the slide (212) is provided with a forming surface (2121) for forming part of the outer profile surface of the rotor, and that the forming surface (2121) is provided with fixing projections (2122).
15. An injection mold according to claim 14, wherein the fixing protrusion (2122) is provided in plurality, and an arrangement direction of the plurality of fixing protrusions (2122) is parallel to an extension direction of the first helical structure.
16. An injection mould according to any one of claims 1-12, characterised in that at least two of said slide (212) enclose a gate (2113) between them, and that the end surface of the core housing (211) is provided with a gate runner (2114).
17. An injection mould according to any one of claims 1-12, characterized in that the inner core (22) comprises two axially spliceable inner mandrels (221), and the drive mechanism (3) is capable of driving the two inner mandrels (221) simultaneously towards both axial ends of the rotor to separate from the rotor.
18. An injection mould according to claim 17, characterized in that a connecting piece (23) is arranged between the two inner mandrels (221), one end of the connecting piece (23) is fixed with one of the two inner mandrels (221), and the other end is connected with the other of the two inner mandrels (221) in a clamping or interference fit manner.
19. An injection mould according to any one of claims 1-12, characterized in that cooling circulation channels are provided in the inner core (22).
20. An injection mold according to claim 19, characterized in that a cooling groove (2212) extending in the axial direction is provided in the inner core (22), a cooling pipe (241) is inserted into the cooling groove (2212), the outer wall of the cooling pipe (241) is spaced apart from the inner wall of the cooling groove (2212), and a gap is provided between the cooling pipe (241) and the end face of the cooling groove (2212).
21. An injection mould according to any one of claims 1-12, characterised in that the outer core (21) and the inner core (22) are arranged vertically.
22. A manufacturing method of a rotor is applied to an injection mold and used for forming the rotor and is characterized in that a first spiral structure is arranged on the outer wall of the rotor and comprises a first spiral section and a second spiral section; the injection mold comprises a mold main body (1), a spiral forming mechanism (2) and a driving mechanism (3); the spiral forming mechanism (2) and the driving mechanism (3) are arranged on the die main body (1); the spiral forming mechanism (2) comprises an outer mold core (21) and an inner mold core (22), the inner core (22) is arranged to penetrate into the outer core (21) when the inner core (22) and the outer core (21) are in a molding position, at least part of a molding cavity is formed between the outer core (21) and the inner core (22), the outer core (21) is provided with a first spiral forming structure for forming the first spiral structure, the first spiral forming structure comprises a first forming section and a second forming section, the outer core (21) comprises a slide assembly and two outer core sleeves (211), the slide assembly is positioned between the two outer core sleeves (211), and can be respectively spliced with the two outer core sleeves (211) to form the outer contour surface of the rotor, the line position assembly comprises at least two line positions (212) arranged along the circumferential direction of the rotating body; at least a portion of said first mold segment is positioned on one of said outer core sleeves (211) and at least a portion of said second mold segment is positioned on the other of said outer core sleeves (211);
the manufacturing method of the rotating body comprises the following steps:
an injection molding step of injecting an injection molding material into the molding cavity to form the rotating body in the molding cavity;
a demolding step, in which the driving mechanism (3) drives the outer core (21) and the inner core (22) to be separated from the rotating body respectively;
the demolding step comprises:
and in the outer core sleeve demolding step, the driving mechanism (3) drives the two outer core sleeves (211) to spirally move around the axis of the rotor so as to respectively move towards the two axial ends of the rotor.
23. A method of manufacturing a rotor as recited in claim 22, wherein at least two of said rows (212) grip said rotor during said step of injection molding to form a molded rotor within said molding cavity.
24. A method of manufacturing a rotor as recited in claim 22, wherein said driving mechanism (3) drives two of said outer core sleeves (211) to simultaneously perform a spiral motion around the axis of said rotor in said outer core sleeve releasing step.
25. A method of manufacturing a rotor as claimed in claim 22, wherein said driving mechanism (3) comprises a first driving assembly (34) and two transmission assemblies, said outer core housings (211) being disposed in one-to-one correspondence with said transmission assemblies;
the step of demoulding the outer core sleeve specifically comprises the step of simultaneously driving the two transmission assemblies by the first driving assembly (34) so as to enable the two transmission assemblies to respectively drive the corresponding outer core sleeve (211) to do spiral motion to be separated from the rotor.
26. A method of manufacturing a rotor as recited in claim 22, wherein said step of demolding further comprises:
an inner core demoulding step, wherein the driving mechanism (3) drives the inner core (22) to be separated from the rotating body;
and a slide demolding step, wherein the driving mechanism (3) drives at least two slides (212) to move away from each other so as to be separated from the rotating body.
27. A method of manufacturing a rotor as recited in claim 26, wherein a second spiral structure is provided on an inner wall of said rotor, and a second spiral forming structure for forming said second spiral structure is provided on said inner core (22);
the inner core demolding step specifically comprises the following steps:
the driving mechanism (3) drives the inner core (22) to perform spiral motion around the axis of the rotating body so as to be separated from the rotating body.
28. A method of manufacturing a rotor as claimed in claim 27, wherein said inner core (22) comprises two axially splittable inner mandrels (221), and said inner core stripping step comprises in particular:
the driving mechanism (3) drives the two inner mandrels (221) to simultaneously rotate around the axis of the rotating body in a spiral mode so as to respectively move towards the two axial ends of the rotating body.
29. A method of manufacturing a rotating body as claimed in claim 28, wherein in said releasing step, one of said outer core sleeve (211) and said inner core shaft (221) on the same side is driven to perform a screw motion by said driving mechanism (3) for a prescribed distance, and then the other of said outer core sleeve (211) and said inner core shaft (221) on the same side is driven to perform a screw motion.
30. A method for manufacturing a rotor according to any one of claims 22-29, wherein the driving mechanism (3) comprises a fixed bracket (31), a movable bracket (32), a driving sleeve (33) and a first driving component (34), the driving sleeve (33) is coaxially disposed and connected with the outer core sleeve (211), the driving sleeve (33) is rotatably connected with the movable bracket (32) and fixed with the movable bracket (32) along the axial direction of the outer core sleeve (211), the driving sleeve (33) is inserted into the fixed bracket (31), one of the outer walls of the fixed bracket (31) and the driving sleeve (33) is provided with a first guiding member (3121), the other is provided with a first spiral guide rail (33111), and the first guiding member (3121) is matched with the first spiral guide rail (33111);
the step of demoulding the outer core sleeve comprises the following steps:
the first driving assembly (34) drives the movable support (32) to move relative to the fixed support (31) along the axial direction of the outer core sleeve (211) so as to drive the outer core sleeve (211) to spirally move around the axis of the rotor to be separated from the rotor.
31. A method of manufacturing a rotor as claimed in claim 30, wherein said driving mechanism (3) further comprises a transmission shaft (35), said transmission shaft (35) is inserted into said transmission sleeve (33), said transmission shaft (35) is coaxially disposed and connected with said inner core (22), one of an outer wall of said transmission shaft (35) and an inner wall of said transmission sleeve (33) is provided with a second guide member (3321), and the other is provided with a second spiral guide (351), said second guide member (3321) is engaged with said second spiral guide (351); when the first driving assembly (34) drives the movable support (32) to move relative to the fixed support (31) along the axial direction of the outer core sleeve (211), the second guide piece (3321) slides relative to the second spiral guide rail (351);
the inner core demolding step comprises:
when the sliding motion of the second guide piece (3321) and the second spiral guide rail (351) is stopped, the first driving assembly (34) continues to drive the movable support (32) to move relative to the fixed support (31) along the axial direction of the outer core sleeve (211) so as to drive the inner core (22) to spirally move around the axis of the rotating body to be separated from the rotating body.
32. A method of manufacturing a rotor as recited in claim 31, further comprising a mold clamping step prior to said injection molding step, said mold clamping step comprising:
the driving mechanism (3) drives the outer core (21) and the inner core (22) to move to corresponding molding positions respectively, so that at least part of the molding cavity is formed between the outer core (21) and the inner core (22).
33. A method of manufacturing a rotor as recited in claim 32, wherein said step of clamping includes:
a line position mold closing step, wherein the driving mechanism (3) drives at least two line positions (212) to move to the molding positions;
an inner core clamping step, wherein the driving mechanism (3) drives the inner core (22) to move to a forming position;
and an outer core sleeve die matching step, wherein the driving mechanism (3) drives the outer core sleeve (211) to spirally move to the forming position of the outer core sleeve, so that the outer core sleeve is spliced with the slide (212) to form the complete outer core (21), and at least part of the forming cavity is formed with the inner core (22).
34. A method for manufacturing a rotor according to claim 33, wherein the driving mechanism (3) comprises a fixed bracket (31), a movable bracket (32), a transmission sleeve (33) and a first driving component (34), the transmission sleeve (33) is coaxially arranged and connected with the outer core sleeve (211), the transmission sleeve (33) is rotatably connected with the movable bracket (32) and fixed with the movable bracket (32) along the axial direction of the outer core sleeve (211), the transmission sleeve (33) is arranged in the fixed bracket (31) in a penetrating manner, one of the fixed bracket (31) and the outer wall of the transmission sleeve (33) is provided with a first guiding member (3121), the other is provided with a first spiral guide rail (33111), and the first guiding member (3121) is matched with the first spiral guide rail (33111);
the outer core sleeving step comprises:
the first driving assembly (34) drives the movable support (32) to move relative to the fixed support (31) along the axial direction of the outer core sleeve (211) so as to drive the outer core sleeve (211) to perform spiral motion around the axis of the rotor and move to the forming position of the outer core sleeve.
35. A method of manufacturing a rotor as claimed in claim 34, wherein said driving mechanism (3) further comprises a transmission shaft (35), said transmission shaft (35) is inserted into said transmission sleeve (33), said transmission shaft (35) is coaxially disposed and connected with said inner core (22), one of an outer wall of said transmission shaft (35) and an inner wall of said transmission sleeve (33) is provided with a second guide member (3321), and the other is provided with a second spiral guide (351), said second guide member (3321) is engaged with said second spiral guide (351); when the first driving assembly (34) drives the movable support (32) to move relative to the fixed support (31) along the axial direction of the outer core sleeve (211), the second guide piece (3321) slides relative to the second spiral guide rail (351);
the inner core die assembly step comprises:
when the sliding motion of the second guide piece (3321) and the second spiral guide rail (351) is stopped, the first driving assembly (34) continuously drives the movable support (32) to move relative to the fixed support (31) along the axial direction of the outer core sleeve (211) so as to drive the inner core (22) to move spirally around the axis of the rotor to move to the forming position, and the axial movement in the mold closing step is opposite to the axial movement in the mold releasing step.
CN202110182067.1A 2021-02-09 2021-02-09 Injection mold and manufacturing method of rotating body Active CN113001894B (en)

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US6238202B1 (en) * 1999-02-26 2001-05-29 Unique Mould Makers Limited Apparatus for ejecting threaded injection molded parts
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