CN115384002A - Injection mold with core pulling structure - Google Patents
Injection mold with core pulling structure Download PDFInfo
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- CN115384002A CN115384002A CN202211167615.4A CN202211167615A CN115384002A CN 115384002 A CN115384002 A CN 115384002A CN 202211167615 A CN202211167615 A CN 202211167615A CN 115384002 A CN115384002 A CN 115384002A
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- 238000002347 injection Methods 0.000 title claims abstract description 23
- 239000007924 injection Substances 0.000 title claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 96
- 238000007493 shaping process Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000000465 moulding Methods 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 13
- 238000001816 cooling Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 230000002349 favourable effect Effects 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000009916 joint effect Effects 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4435—Removing or ejecting moulded articles for undercut articles using inclined, tiltable or flexible undercut forming elements driven by the ejector means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The application relates to the field of injection molds, in particular to an injection mold with a core pulling structure. The key points of the technical scheme are as follows: the movable mold is provided with a first movable part and a second movable part, the first movable part and the fixed mold are closed to form a cavity, and the cavity is provided with a body section and an inclined section; the outer inclined core pulling mechanism is arranged at the fixed die and provided with a first inclined channel for the outer inclined core pulling mechanism to slide, and the outer inclined core pulling mechanism enters the inclined section from the outer side in a reciprocating mode through the first inclined channel so as to form the outer surface of the inclined part; the mechanism of loosing core that inclines in locates second movable part department, and first movable part has the second slope passageway that supplies mechanism sliding fit that looses core that inclines in, and the mechanism of loosing core that inclines in passes through the second slope passageway, gets into from inboard reciprocating the slope section to the internal surface of shaping slope, the high quality shaping of work piece can be realized to this application.
Description
Technical Field
The application relates to the field of injection molds, in particular to an injection mold with a core pulling structure.
Background
The injection molding is also called injection molding, is a process for molding a plastic workpiece by adopting a molding mode of injection and molding through a corresponding mold structure, has the advantages of high production speed, high production efficiency, accurate size of the workpiece and the like, is suitable for mass production of products with complex shapes, and is called as an industrial parent.
At present, a mold is generally provided with a fixed mold and a movable mold which can be opened and closed mutually, a runner is arranged on the fixed mold, grooves are respectively formed in the movable mold and the fixed mold, when the fixed mold and a female mold are closed mutually, the two grooves are spliced mutually to form a cavity consistent with the shape of a workpiece, fluid plastic enters the cavity through the runner, the fluid plastic is solidified to form the workpiece through cooling, then the fixed mold and the movable mold are opened, a corresponding ejection mechanism is arranged on the movable mold, the workpiece is ejected, and the production action of the mold is realized.
To the correlation technique among the above-mentioned, there is a casing work piece, and it has main part and the slope that leans out to extend from main part one side, and characteristic profiles such as slotty, hole or boss are all seted up to the inboard and the outside of slope, and in actual forming process, because of the work piece structure is irregular and comparatively complicated, the high quality shaping of work piece is difficult to realize to conventional mould forming structure.
Disclosure of Invention
In order to realize the high-quality shaping of promoting the work piece, this application provides an injection mold with structure of loosing core.
The application provides an injection mold with structure of loosing core adopts following technical scheme:
an injection mold with a core pulling structure comprises a movable mold and a fixed mold which are mutually opened and closed, wherein the movable mold is provided with a first movable part and a second movable part which can be mutually separated and mutually closed, the first movable part and the fixed mold are closed to form a cavity, the cavity is provided with a body section for forming a body part and an inclined section for forming an inclined part, the body section is horizontally placed in the mold, and the inclined section is communicated with the body section and is obliquely arranged in the mold compared with the body section; the outer inclined core pulling mechanism is arranged at the fixed die, a first inclined channel for the outer inclined core pulling mechanism to slide is arranged at the fixed die, and the outer inclined core pulling mechanism enters the inclined section from the outer side in a reciprocating mode through the first inclined channel so as to form the outer surface of the inclined part; the inner inclined core pulling mechanism is arranged at the second movable part, the first movable part is provided with a second inclined channel for the sliding fit of the inner inclined core pulling mechanism, and the inner inclined core pulling mechanism enters the inclined section from the inner side in a reciprocating mode through the second inclined channel so as to form the inner surface of the inclined part.
By adopting the technical scheme, the conventional core pulling movement is difficult to realize the forming of the inclined part which is obliquely arranged, and the forming of the inclined part can be realized by arranging the first inclined channel and the second inclined channel, so that the outward inclined core pulling mechanism and the inward inclined core pulling mechanism can be guided to respectively perform inclined movement, and the side pulling forming of the characteristics on the inclined part can be realized, thereby satisfying the placing angle of the inclined part, and smoothly realizing the core pulling action.
Preferably, the outer inclined core pulling mechanism comprises a first core pulling driving part arranged on the fixed die; the first sliding connection block is connected with the first core-pulling driving piece, and the first core-pulling driving piece is used for driving the first sliding connection block to move in a reciprocating mode; the outer oblique core pulling block is arranged in the first oblique channel in a sliding mode, a first sliding groove is formed in the outer oblique core pulling block, and one end of the outer oblique core pulling block is buckled with the first sliding connecting block through the first sliding groove and is in sliding fit with the first sliding connecting block.
Through adopting above-mentioned technical scheme, first spout provides the motion degree of freedom for the piece of loosing core and first sliding connection piece to one side outward, and simultaneously under the lock joint effect and under the drive of the driving piece of loosing core, first sliding connection piece can drive the piece of loosing core to one side outward and remove in the first slope passageway of slope, and the action is swift and ingenious.
Preferably, the inner inclined core pulling mechanism comprises a core body fixedly connected to the second movable part; the second sliding connecting block is arranged on the core body; and the inner inclined core pulling block is arranged in the second inclined channel in a sliding manner, a second sliding groove is formed in the inner inclined core pulling block, and the inner inclined core pulling block is buckled with the second sliding connecting block through the second sliding groove and is in sliding fit with the second sliding connecting block.
Through adopting above-mentioned technical scheme, the second spout is for interior oblique loose core piece and second sliding connection piece provide the motion degree of freedom, and simultaneously under the lock joint effect and under the motion of core, second sliding connection piece can drive interior oblique loose core piece and remove in the second slope passageway of slope, and the action is swift and ingenious.
Preferably, the inner inclined core pulling mechanism further comprises an elastic ejecting piece, the elastic ejecting piece is movably arranged on the inner inclined core pulling block, and one end of the elastic ejecting piece extends to the cavity; when the elastic ejection piece is in a natural state, the other end of the elastic ejection piece is abutted to the core body, and when the second sliding connection block slides in the second sliding groove, the elastic ejection piece can be pushed, so that the elastic ejection piece extends towards the cavity and ejects a workpiece.
Through adopting above-mentioned technical scheme, the rake of work piece sets up because of the slope, and the movable mould of clenching more easily behind the cooling shaping, if adopt conventional ejecting mode on the basis, the work piece is strained easily, causes the shaping defect, at this moment, including the inside elasticity ejecting that sets up of the interior oblique core pulling block, can make the rake and the movable mould separation of work piece, be favorable to the work piece drawing of patterns and shaping quality to promote, the structure is ingenious and practical.
Preferably, the elastic ejection pieces are multiple groups, and the multiple groups of elastic ejection pieces are sequentially arranged along the second sliding grooves.
Through adopting above-mentioned technical scheme, the in-process that the second sliding connection piece slided in the second spout can promote multiunit elasticity ejecting in proper order, and multiunit elasticity ejecting starts respectively, and then the subassembly pushes away from the movable mould with the rake of work piece, and the drawing of patterns action is more thorough and reliable.
Preferably, interior oblique loose core piece is equipped with inboard water course and water course interface respectively, inboard water course is located inside the interior oblique loose core piece, inboard water course passes through water course interface and outside intercommunication, first movable part department has the confession the hole of dodging of water course interface displacement.
Through adopting above-mentioned technical scheme, including the inside inboard water course that sets up of loosing core piece to one side, accessible water course interface inserts cooling water to inboard water course in, the realization is cooled off the work piece, at this in-process, it is movable to loose core the piece because of interior to one side, conventional water course setting mode is difficult to realize inserting the function, at this moment, through setting up the water course interface, the water course structure can be connected with outside pipeline, introduce the mould inside with the pipeline in other words and connect, the hole is dodged in the cooperation, make the water course interface can obtain the removal space along with the removal of interior oblique piece of loosing core, realize the setting of inboard water course.
Preferably, the fixed die further comprises a first side core-pulling mechanism, wherein the first side core-pulling mechanism comprises a first inclined guide rod which is arranged on the fixed die; the first side core-pulling block is arranged on the first movable part in a sliding mode, the first inclined guide rod penetrates through the first side core-pulling block and is matched with the first side core-pulling block in a sliding mode, and the first side core-pulling block can extend into the end portion of the inclined section in a reciprocating mode.
Through adopting above-mentioned technical scheme, set up first side core pulling block in the position that is close to slope section tip, on the one hand, the rake of work piece has the arc structure usually, first side core pulling block can correspond the adjustment profile, in order to realize carrying out the shaping to the tip profile of the rake of work piece, on the other hand, the tip of rake can lock in movable mould department usually after cooling shaping, at this moment, order about first side core pulling block and remove, can initiatively reduce the area of contact between work piece and the movable mould, so be favorable to the work piece drawing of patterns.
Preferably, the fixed die further comprises a second side core-pulling mechanism, wherein the second side core-pulling mechanism comprises a second inclined guide rod and is arranged on the fixed die; and the second side core-pulling block is arranged on the first movable part in a sliding manner, the second inclined guide rods penetrate through the second side core-pulling block and are matched with each other in a sliding manner, and the first side core-pulling block can extend into the body section in a reciprocating manner.
By adopting the technical scheme, the edge position of the body part of the workpiece can be provided with some characteristics such as a notch, a convex edge and the like, and at the moment, the second core-pulling block can move back and forth under the driving of the second inclined guide rod, so that the convex edge of the workpiece is formed.
Preferably, a distance pull rod is arranged on the second movable portion, and a positioning boss which is in butt fit with the first movable portion is arranged on the distance pull rod.
Through adopting above-mentioned technical scheme, the distance pull rod can play the effect of the die sinking interval between first movable part of control and the second movable part to make the mechanism of loosing core of interior slope remove in reasonable position, with the possibility that reduces the mechanism collision, the structure is practical.
Preferably, the ejection mechanism comprises a push plate assembly movably arranged on the second movable part; and the push rod assembly is arranged on the push plate assembly, penetrates through the first movable part and the inner inclined core pulling mechanism and extends into the cavity.
Through adopting above-mentioned technical scheme, under push pedal assembly's drive, can order about push rod assembly and ejecting to the work piece, the process is swift high-efficient.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the first inclined channel and the second inclined channel are arranged to guide the outer inclined core pulling mechanism and the inner inclined core pulling mechanism to respectively perform inclined motion, so that the characteristics on the inclined part are subjected to side pulling forming, the placing angle of the inclined part is met, core pulling action can be smoothly realized, meanwhile, the movable mould is set as a first movable part and a second movable part which can be opened and closed, the inner inclined core pulling mechanism is arranged at the second movable part, the first movable part and the second movable part can drive the inner inclined core pulling mechanism to move in the opening and closing process, the structure is ingenious and reasonable, further, mutual interference among the mechanisms is not easy to cause, the mechanisms can be efficiently matched, the forming quality of a product is ensured and improved, and the problems of unreasonable mould structure and low forming quality of a workpiece due to high forming difficulty of a complex workpiece are solved;
2. the inclined part of the workpiece is arranged in an inclined manner, so that the movable die is more easily fastened after cooling forming, if a conventional ejection mode is adopted, the workpiece is easily damaged, and forming defects are caused, at the moment, the elastic ejection part is arranged in the inner inclined core-pulling block, so that the inclined part of the workpiece can be separated from the movable die, the workpiece demolding and forming quality improvement are facilitated, and the structure is ingenious and practical;
3. the first side is loosed core the piece and can be corresponded the adjustment profile on the one hand to the realization is moulded the tip profile of the rake of work piece, and on the other hand, the tip of rake can lock usually in movable mould department after the cooling shaping, at this moment, orders about first side and looses core the piece and removes, can initiatively reduce the area of contact between work piece and the movable mould, so be favorable to the work piece drawing of patterns.
Drawings
Fig. 1 is a schematic view of a structure of a workpiece.
Fig. 2 is a schematic view of another perspective of the workpiece.
Fig. 3 is a schematic structural diagram of a mold according to a preferred embodiment of the present application.
FIG. 4 is a cross-sectional view of a mold in a preferred embodiment of the present application.
FIG. 5 is a schematic diagram of the structure of the outer inclined core pulling mechanism, the inner inclined core pulling mechanism, the first side core pulling mechanism and the second side core pulling mechanism in a preferred embodiment of the present application.
FIG. 6 is a schematic structural diagram of an outer tilt core pulling mechanism in a preferred embodiment of the present application.
FIG. 7 is a schematic structural diagram of an inner inclined core pulling mechanism in a preferred embodiment of the present application.
FIG. 8 is a schematic view of an alternative embodiment of the inner inclined core pulling mechanism.
Description of the reference numerals:
1. a body portion; 1001. a flange;
2. an inclined portion; 21. a convex edge;
3. moving the mold; 31. a first movable portion; 311. b, plate; 3111. avoiding holes; 312. a movable mould core; 313. a second inclined channel; 314. a containing groove; 32. a second movable portion; 321. a movable mould seat plate; 322. cushion blocks; 323. a backing plate;
4. fixing a mold; 41. a fixed die base plate; 42. a plate; 43. a first inclined channel;
5. a distance pull rod; 6. a cavity; 61. a body section; 62. an inclined section;
7. an outer inclined core-pulling mechanism; 71. a first core pulling driving member; 72. a first sliding connection block; 73. externally and obliquely drawing the core block; 731. a first chute;
8. an inner inclined core pulling mechanism; 81. a core body; 82. a second sliding connection block; 83. internally and obliquely drawing a core block; 831. a second chute; 832. an inner water channel; 833. a waterway interface; 84. an elastic ejector; 841. a top rod; 842. a return spring;
9. a first side core-pulling mechanism; 91. a first inclined guide rod; 92. a first side core block;
10. a second side core-pulling mechanism; 101. a second inclined guide rod; 102. a second side core pulling block;
11. an ejection mechanism; 111. a push plate assembly; 1111. a material pushing plate; 1112. a push rod fixing plate; 112. a push rod assembly.
Detailed Description
The present application is described in further detail below with reference to figures 1-8.
Referring to fig. 1 and fig. 2, a housing workpiece is shown, which includes a main body 1 and an inclined portion 2 connected to one side of the main body 1 and inclined with respect to the main body 1, a section of the inclined portion 2 away from the main body 1 has a convex edge 21 structure, in an actual molding process, a part of the convex edge 21 of the inclined portion 2 is fastened to one side of a movable mold 3 after being cooled, so that demolding is difficult, and at this time, if demolding is performed in a forced ejection manner, the overall structure of the mold may be damaged, and the yield of the workpiece is low; meanwhile, the flange 1001 characteristic of the body portion 1 on the side away from the inclined portion 2 also causes difficulty in efficient and high-quality forming of workpieces, and forming the workpieces of the above-mentioned type still has a high technical obstacle.
The embodiment of the application discloses injection mold with structure of loosing core. Referring to fig. 3 and 4, the injection mold comprises a movable mold 3 and a fixed mold 4 which are opened and closed with each other, wherein in the present embodiment, the fixed mold 4 comprises a fixed mold seat plate 41 and an a plate 42 which are fixed with each other, a fixed mold groove and a hot runner system are arranged at the a plate 42, the hot runner system is communicated with the fixed mold groove, and the hot runner system conveys fluid plastic into the fixed mold groove.
The movable mold 3 comprises a first movable part 31 and a second movable part 32 which can be mutually opened and closed, and the first movable part 31 and the fixed mold 4 are closed to form a cavity 6; the first movable portion 31 includes a B plate 311 and a movable mold core 312 fixedly mounted on the B plate 311, the B plate 311 and the a plate 42 can be closed to form a cavity 6 between the movable mold core 312 and the recess of the fixed mold 4.
In addition, the second movable portion 32 includes a movable mold base plate 321, a spacer block 322 fixed on the movable mold base plate 321, and a spacer plate 323 fixed on the spacer block 322, wherein the first movable portion 31 and the second movable portion 32 can be separated from each other and closed with each other; specifically, a guide pillar may be installed on the movable mold base plate 321, a guide sleeve may be installed on the B plate 311, and the guide pillar and the guide sleeve are slidably engaged to guide the first movable portion 31 and the second movable portion 32 to open and close each other.
Here, in order to enable the corresponding mechanism to have reasonable movement displacement, the displacement distance between the first movable portion 31 and the second movable portion 32 needs to be limited; based on this, the second movable part 32 is provided with a distance pull rod 5, one end of the distance pull rod 5 is fixedly arranged at the base plate 323, and the other end of the distance pull rod 5 is provided with a positioning boss; meanwhile, a step hole is formed in the plate B311, the distance pull rod 5 penetrates into the step hole, the positioning boss is in abutting fit with the first movable portion 31, and the distance pull rod 5 limits the opening distance between the first movable portion 31 and the second movable portion 32, so that the mechanism has a reasonable movement displacement distance.
With continued reference to fig. 4, to mold the workpiece, the cavity 6 comprises a body section 61 that molds the body portion 1 and an inclined section 62 that shapes the inclined portion 2, the inclined section 62 communicating with the body section 61; the body section 61 is horizontally placed in the mold, and it should be explained that the horizontal placement refers to that the extending direction of the body section 61 is parallel to the opening and closing surface between the fixed mold 4 and the movable mold 3, when the fixed mold 4 and the movable mold 3 are opened, the pulling force applied to the body section 1 is basically consistent with the separating direction between the movable mold 3 and the fixed mold 4, further, it can be understood that the pulling force applied to the workpiece when the workpiece is opened is approximately in the normal direction of the surface of the workpiece, the opening mode is not easy to pull the workpiece, that is, the surface of the body section 1 is not easy to pull; the molding quality of the body portion 1 is secured. Meanwhile, after the main body section 61 is horizontally arranged, the inclined section 62 of the cavity 6 is inclined inside the mold compared with the main body section 61, and the end of the inclined part 2 has the convex edge 21, so that the workpiece is difficult to demould.
Based on the above, in order to improve the molding quality of the workpiece, the mold further comprises an outer inclined core-pulling mechanism 7 arranged at the fixed mold 4, an inner inclined core-pulling mechanism 8 arranged at the second movable part 32, and a first side core-pulling mechanism 9 arranged at the first movable part 31. The outer inclined core-pulling mechanism 7, the inner inclined core-pulling mechanism 8 and the first side core-pulling mechanism 9 are used for molding the inclined part 2 of the workpiece and simultaneously improving the smoothness of the inclined part 2 during demoulding.
In the process of mutually opening the die of the fixed die 4 and the movable die 3, in order to successfully realize the demoulding of the workpiece, the outer inclined core-pulling mechanism 7 is started firstly, the support of the workpiece on one side of the fixed die 4 is removed, then the first movable part 31 and the second movable part 32 are waited to be opened mutually, the second movable part 32 drives the inner inclined core-pulling mechanism 8 to be away from the inner surface of the workpiece, the support of the workpiece on one side of the movable die 3 is reduced, finally, the fixed die 4 and the movable die 3 are opened mutually, the first side core-pulling mechanism 9 is pulled away towards the outside of the die, the inclined part 2 of the workpiece is loosened, and the demoulding of the workpiece is facilitated.
Referring to fig. 4 and 5, in particular, the outer inclined core-pulling mechanism 7 is used for molding the outer surface of the inclined part 2, wherein, in order to facilitate the movement of the outer inclined core-pulling mechanism 7, the fixed mold 4 is provided with a first inclined channel 43 for sliding the outer inclined core-pulling mechanism 7, and in this embodiment, the first inclined channel 43 is arranged through the side edge of the a plate 42 and is vertically communicated with an inclined section 62 of the cavity 6.
The outer inclined core pulling mechanism 7 comprises a first core pulling driving piece 71, a first sliding connection block 72 and an outer inclined core pulling block 73, the first core pulling driving piece 71 is fixedly installed at the position of the A plate 42 of the fixed die 4, the first core pulling driving piece 71 is used for outputting reciprocating power, generally, an air cylinder, an oil cylinder or a motor gear rack structure can be selected, a structure capable of outputting reciprocating motion can be tried to be selected, and a hydraulic cylinder element is selected as an example in the embodiment.
Referring to fig. 4 and 6, the first sliding connection block 72 is fixedly connected to the telescopic rod of the first core-pulling driving member 71, the first core-pulling driving member 71 is configured to drive the first sliding connection block 72 to reciprocate, and the first sliding connection block 72 has a buckling slider, which is generally a T-shaped structure. In addition, the outer inclined core pulling block 73 is slidably disposed in the first inclined channel 43, specifically, the outer contour of the outer inclined core pulling block 73 is matched with the opening contour of the first inclined channel 43, the surface of the outer inclined core pulling block 73 is in sliding fit with the inner wall of the first inclined channel 43, and at this time, the outer inclined core pulling block 73 can enter the inclined section 62 from the outside of the mold along the first inclined channel 43.
In order to drive the outer inclined core pulling block 73 to move, the outer inclined core pulling block 73 is provided with a first sliding groove 731, the notch profile of the first sliding groove 731 is in a T-shaped structure, the buckling sliding block slides into the first sliding groove 731 in the T-shaped structure, and the extending direction of the first sliding groove 731 is matched with the inclined angle of the inclined section 62; one end of the outer inclined core pulling block 73 is buckled with the first sliding connecting block 72 through a first sliding groove 731 and is in sliding fit with each other; in other embodiments, the first sliding groove 731 and the engaging sliding block may also be in a dovetail groove-shaped structure, so that the first sliding groove 731 and the engaging sliding block can be engaged with each other and can also slide with each other; at this time, the outer inclined core pulling block 73 is driven by the first sliding connection block 72 to reciprocate in the inclined first inclined channel 43, and the first sliding chute 731 provides a degree of freedom for the movement of the outer inclined core pulling block 73 and the first sliding connection block 72.
It should be noted that, a groove or a protrusion may be disposed at one end of the outer inclined core pulling block 73 inserted into the cavity 6 to realize the corresponding feature of the outer surface molding of the inclined portion 2, and the specific molding structure may be correspondingly disposed according to actual requirements, which is not limited herein.
Referring to fig. 4 and 5, correspondingly, the inner inclined core-pulling mechanism 8 is used to shape the inner surface of the inclined portion 2. In order to facilitate the movement of the inner inclined core pulling mechanism 8, the first movable portion 31 is provided with a second inclined channel 313 for the inner inclined core pulling mechanism 8 to slide, in this embodiment, the second inclined channel 313 is specifically disposed inside the movable die core 312 and vertically communicated with the inclined section 62 of the die cavity 6, meanwhile, the first movable portion 31 is further provided with a receiving groove 314 communicated with the second inclined channel 313, the inner inclined core pulling mechanism 8 is located in the receiving groove 314, and the receiving groove 314 provides more displacement space for the movement of the inner inclined core pulling mechanism 8.
Specifically, referring to fig. 4 and 7, the inner inclined core pulling mechanism 8 reciprocates from the inside into the inclined section 62 through the second inclined channel 313 to effect shaping of the inside surface features of the inclined section 2. The inner inclined core comprises a core body 81, a second sliding connecting block 82 and an inner inclined core pulling block 83, wherein the core body 81 is fixedly arranged at the base plate 323 of the second movable part 32, and the core body 81 is accommodated in the accommodating groove 314; one end that backing plate 323 was kept away from to core 81 has the inclined plane, the inclination of inclined plane and the inclination looks adaptation of slope end, and second sliding connection piece 82 fixed mounting is in core 81 department to be located the inclined plane, second sliding connection piece 82 is the tilt state this moment, and second sliding connection piece 82 is T shape block-shaped structure in this embodiment.
In addition, the outer edge profile of the inner inclined core block 83 is matched with the opening profile of the second inclined channel 313, the surface of the inner inclined core block 83 is in sliding contact with the inner wall of the second inclined channel 313, and the inner inclined core block 83 is arranged in the second inclined channel 313 in a sliding manner; meanwhile, the inner inclined core pulling block 83 has a second sliding slot 831, the second sliding slot 831 is also a T-shaped structure in this embodiment, the second sliding connecting block 82 is located in the second sliding slot 831 and is wedged with the second sliding slot 831, at this time, the inner inclined core pulling block 83 is buckled with the second sliding connecting block 82 through the second sliding slot 831, and the inner inclined core pulling block 83 is slidably matched with the second sliding connecting block 82.
Under the state that the first movable portion 31 and the second movable portion 32 are closed to each other, the core 81 is located in the accommodating groove 314, the core 81 plugs the inner inclined core pulling block 83 into the second inclined channel 313 through the second sliding connection block 82, the second inclined channel 313 extends into the inclined section 62 of the cavity 6, so as to mold the inner surface of the workpiece, according to the actual requirement of the workpiece characteristics, the end portion of the inner inclined core pulling block 83 may be provided with a groove or a boss, and the like, so as to mold corresponding characteristics at the inner surface of the inclined portion 2, and the specific molding structure is not limited specifically here.
After the workpiece is formed, the first movable portion 31 and the second movable portion 32 can be mutually opened under the driving of the injection molding machine, at this time, in the process that the first movable portion 31 and the second movable portion 32 are mutually opened, the second movable portion 32 drives the core 81 to be drawn out from the accommodating groove 314, the second sliding connection block 82 synchronously moves along with the core 81, then the inner inclined core-pulling block 83 is drawn out under the guiding of the second sliding groove 831, the inner inclined core-pulling block 83 slides in the second inclined channel 313 and is drawn out of the cavity 6, the inner inclined core-pulling block 83 loosens the inner wall of the workpiece, a demolding moving space is provided for the inclined portion 2 of the workpiece, and the workpiece is finally and smoothly demolded.
Referring to fig. 7 and 8, after the inner inclined core-pulling block 83 is separated from the cavity 6, the rest of the inclined portion 2 of the workpiece may be wrapped around the movable mold core 312, and the inclined portion 2 of the workpiece may possibly cause strain when the workpiece is demolded, and therefore, the inner inclined core-pulling mechanism 8 further includes an elastic ejector 84 movably disposed inside the inner inclined core-pulling block 83, and configured to apply an ejecting force to the inclined portion 2 of the workpiece, so that the inclined portion 2 of the workpiece is more favorable for loosening the movable mold core 3.
Wherein, the elastic ejection member 84 comprises an ejector rod 841 and a return spring 842; when the concrete arrangement is carried out, firstly, an accommodating hole penetrates through the inner inclined core-pulling block 83, and two ends of the accommodating hole are respectively communicated with the cavity 6 and the second sliding groove 831; then the mandril 841 is movably inserted into the containing hole, the reset spring 842 is sleeved on the mandril 841, the containing hole is in a step shape, the mandril 841 is integrally connected with a stress boss in the circumferential direction, two ends of the reset spring 842 are respectively abutted with the step surface of the containing hole and the stress boss, when the spring is in a natural state, one end of the elastic ejection piece 84 extends into the cavity 6 and is flush with the inner wall of the cavity 6, and the other end of the elastic ejection piece 84 is abutted with the core body 81
Meanwhile, the end part of the ejector rod 841 is of a spherical surface structure, when the second sliding connection block 82 slides in the second sliding groove 831, the ejector rod 841 is pushed by the spherical surface, so that the ejector rod 841 extends towards the cavity 6 and ejects a workpiece, and further the inclined part 2 is ejected away from the movable die 3, so that the demolding of the workpiece is facilitated, the pulling damage of the workpiece is reduced, and the forming quality of the workpiece is improved; after the workpiece is separated from the die, the second sliding connection block 82 is reset, and one end of the mandril 841 extending to the cavity 6 is kept in a state of being flush with the inner wall of the cavity 6 under the driving of the reset spring 842, so that the obstruction to the workpiece forming is reduced.
Further, elasticity ejecting 84 still can be established to the multiunit, for example two sets of, three groups or four groups etc., specifically set up quantity and do not do specifically limit, multiunit elasticity ejecting 84 sets gradually along second spout 831, so set up, second sliding connection piece 82 is at the in-process that slides, can promote multiunit elasticity ejecting 84 in proper order, multiunit elasticity ejecting 84 starts respectively, and then the subassembly pushes up the rake 2 of work piece gradually and leaves the movable mould 3, so be difficult for the rake 2 of hindering the work piece in top, more be favorable to making rake 2 pine take off the movable mould 3 simultaneously.
Referring back to fig. 5, the first side core-pulling mechanism 9 also participates in the forming of the inclined portion 2, and specifically, the first side core-pulling mechanism 9 is used for forming the contour of the end of the inclined portion 2 away from the body portion 1; the first side core pulling mechanism 9 includes a first inclined guide rod 91 and a first side core pulling block 92, and the first inclined guide rod 91 is fixedly installed on the a plate 42 of the fixed mold 4.
The first side core pulling block 92 is slidably mounted on the B plate 311 of the first movable portion 31, usually, a guide block may be mounted on the B plate 311, and is respectively disposed on two sides of the first side core pulling block 92, and the mounting of the first side core pulling block 92 is realized by sliding and abutting two sides of the first side core pulling block 92 on the guide block; an inclined guide hole penetrates through the first side core-pulling block 92, the first inclined guide rod 91 penetrates through the first side core-pulling block 92 through the inclined guide hole and is in mutual sliding fit, and in the process that the fixed die 4 and the movable die 3 are opened and closed mutually, the first inclined guide rod 91 guides the first side core-pulling block 92 to extend into the end part of the inclined section 62 in a reciprocating mode, so that the end part of a workpiece is molded; in the present embodiment, the end of the inclined section 2 is convexly curved, so the first side core block 92 has a concave feature to fit the structure of the inclined section 2; on the one hand, the first side core pulling block 92 participates in the forming of the end face position of the inclined part 2 to obtain a corresponding workpiece structure; on the other hand, when the workpiece is demolded, the first side core-pulling block 92 can be far away from the cavity 6, so that the contact area between the workpiece and the movable die 3 can be actively reduced, and the workpiece demolding is further facilitated.
With continued reference to fig. 5, the mold further comprises a second side core-pulling mechanism 10, the second side core-pulling mechanism 10 is arranged in a similar manner to the first side core-pulling mechanism 9, except that the second side core-pulling mechanism 10 is mainly used for forming the flange 1001 at the body portion 1 of the workpiece, and the contour of the flange 21 also causes certain difficulties in demolding the workpiece. In order to solve the above problem, the second side core pulling mechanism 10 includes a second inclined guide rod 101 and a second side core pulling block 102, the second inclined guide rod 101 is fixedly installed at the a plate 42 of the fixed mold 4, the second side core pulling block 102 is slidably installed at the first movable portion 31 in a manner consistent with that of the first side core pulling block 92, the second side core pulling block 102 also has inclined guide holes, the second inclined guide rod 101 penetrates through the second side core pulling block 102 and is in mutual sliding fit, and a flange forming groove is concavely arranged at the second side core pulling block 102 for forming the flange 1001 feature on the body portion 1.
On one hand, in the process that the fixed die 4 and the movable die 3 are opened and closed mutually, the second side core pulling block 102 can extend into the body section 61 in a reciprocating mode so as to mold a workpiece; on the other hand, when the second side core block 102 is away from the body section 61, the flange 1001 on the body section 1 is released, facilitating the work piece release.
Referring to fig. 7 and 8, in a specific arrangement, a hot runner system of the mold is communicated with a body section 61 of the cavity 6, and at this time, because an inclined section 62 is far away compared with an entry point of plastic, a conventional cooling manner cannot achieve a required cooling effect.
An inner side water channel 832 and a water channel interface 833 are respectively arranged at the inner inclined core-pulling block 83, wherein the inner side water channel 832 is positioned inside the inner inclined core-pulling block 83, the inner side water channel 832 is arranged around the inner inclined core-pulling block 83, during the setting process, the main body contour of the inner side water channel 832 can be firstly formed in a drilling mode, then, a plug is installed, the plug plugs the redundant opening, the closing of the inner side water channel 832 is realized, and at the moment, the inner side water channel 832 is provided with a water outlet and a water inlet.
The two channel interfaces 833 are used for communicating the inner channel 832 with the outside, in this embodiment, the two channel interfaces 833 are fixedly installed at the inner inclined core pulling block 83, the two channel interfaces 833 are communicated with a water inlet and a water outlet of the inner channel 832, the channel interfaces 833 can be connected with water hoses, through holes are formed in the side portion of the mold at the moment, the water hoses are led into the channel interfaces 833 from the outside of the mold through the through holes, and the other ends of the water hoses are communicated with the mold temperature controller, so that the circulating delivery of cooling water is realized.
Further, in order to meet the requirement of stable water delivery of the inner inclined core pulling block 83 in the movement process, an avoiding hole 3111 for displacement avoidance of the water supply channel interface 833 penetrates through the B plate 311 of the first movable portion 31, and the avoiding hole 3111 is matched with the water supply channel interface 833 to obtain a moving space along with the movement of the inner inclined core pulling block 83, so that structural interference is reduced, and stable delivery of cooling water is realized.
Referring back to fig. 5, the mold further includes an ejection mechanism 11, the ejection mechanism 11 includes a push plate assembly 111 and a push rod assembly 112, wherein the push plate assembly 111 includes a push plate 1111 and a push rod fixing plate 1112 that are fixedly connected to each other, the push plate assembly 111 is movably disposed at the second movable portion 32 by installing a guide pillar, the push plate 1111 is connected to the injection molding machine, and under the driving of the injection molding machine, the push plate assembly 111 is driven to reciprocate.
The push rod assembly 112 includes a plurality of push rods, one end of each push rod is fixedly installed at the position of the push rod fixing plate 1112, the other end of each push rod extends into the cavity 6, specifically, a plurality of material pushing holes are formed in the position of the first movable portion 31 in a penetrating manner, the plurality of material pushing holes can be respectively formed in the core body 81, the movable mold core 312 and the movable mold 3 fixing plate, the push rods penetrate through the core body 81, the movable mold core 312, the movable mold 3 fixing plate and other parts through the material pushing holes, at the moment, the push rod assembly 112 penetrates through the first movable portion 31 and the inner inclined core pulling mechanism 8 and extends into the cavity 6, the push rod assembly 111 is in the reciprocating movement process, the push rod assembly 112 can be driven to eject the workpiece under the driving of the push rod assembly 111, and the process is fast and efficient.
The implementation principle of the injection mold with the core pulling structure in the embodiment of the application is as follows: through setting up first slope passageway 43 and second slope passageway 313, can guide the outer slope mechanism 7 of loosing core and the inner slope 8 of loosing core and incline the motion respectively, realize carrying out the side to the inside and outside both sides of slope 2 and take out the shaping, satisfy the angle of placing of slope 2, can realize the action of loosing core smoothly, convenience when the work piece drawing of patterns is promoted.
Meanwhile, the elastic ejector 84 can separate the inclined part 2 of the workpiece from the movable die 3 independently, so that the workpiece is further convenient to demould, and the workpiece is not easy to be pulled; in addition, an inner water channel 832 is arranged in the inner inclined core pulling block 83 and is matched with the avoiding hole 3111, so that a moving space can be obtained by the water channel interface 833 along with the movement of the inner inclined core pulling block 83, efficient cooling is realized, and the forming quality of a workpiece is improved.
The mechanism is not easy to interfere with each other, the mechanisms can be efficiently matched, the forming quality of a product is guaranteed and improved, and the problems that the mold structure is unreasonable and the forming quality of the workpiece is low due to the fact that the forming difficulty of complex workpieces is high are solved.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides an injection mold with structure of loosing core, includes movable mould (3) and cover half (4) that open and shut each other, its characterized in that:
the movable mold (3) is provided with a first movable part (31) and a second movable part (32) which can be separated from each other and closed with each other, the first movable part (31) and the fixed mold (4) are closed to form a mold cavity (6), the mold cavity (6) is provided with a body section (61) for molding the body part (1) and an inclined section (62) for molding the inclined part (2), the body section (61) is horizontally placed in the mold, and the inclined section (62) is communicated with the body section (61) and is obliquely arranged in the mold compared with the body section (61);
the outer inclined core-pulling mechanism (7) is arranged at the fixed die (4), a first inclined channel (43) for the outer inclined core-pulling mechanism (7) to slide is arranged at the fixed die (4), and the outer inclined core-pulling mechanism (7) enters the inclined section (62) from the outer side in a reciprocating mode through the first inclined channel (43) so as to form the outer surface of the inclined part (2);
interior oblique mechanism of loosing core (8), locate second movable part (32) department, first movable part (31) have the confession interior oblique mechanism of loosing core (8) sliding fit's second slope passageway (313), interior oblique mechanism of loosing core (8) passes through second slope passageway (313), from inboard reciprocal entering slope section (62) to the internal surface of shaping slope portion (2).
2. The injection mold with the core pulling structure according to claim 1, wherein: the outer inclined core pulling mechanism (7) comprises a first core pulling driving part (71) which is arranged on the fixed die (4);
the first sliding connection block (72) is connected with the first core-pulling driving piece (71), and the first core-pulling driving piece (71) is used for driving the first sliding connection block (72) to reciprocate;
the outer oblique core-pulling block (73) is arranged in the first oblique channel (43) in a sliding mode, a first sliding groove (731) is formed in the outer oblique core-pulling block (73), and one end of the outer oblique core-pulling block (73) is buckled with the first sliding connecting block (72) through the first sliding groove (731) and is in sliding fit with the first sliding connecting block (72) mutually.
3. The injection mold with the core pulling structure according to claim 1, wherein: the inner inclined core pulling mechanism (8) comprises a core body (81) fixedly connected to the second movable part (32);
a second sliding connecting block (82) provided to the core (81);
the inner inclined core-pulling block (83) is arranged in the second inclined channel (313) in a sliding mode, a second sliding groove (831) is formed in the inner inclined core-pulling block (83), and the inner inclined core-pulling block (83) is buckled with the second sliding connecting block (82) through the second sliding groove (831) and is in sliding fit with the second sliding connecting block.
4. The injection mold with the core pulling structure according to claim 3, wherein: the inner inclined core-pulling mechanism (8) also comprises an elastic ejecting part (84),
the elastic ejection piece (84) is movably arranged in the inner inclined core-pulling block (83), and one end of the elastic ejection piece (84) extends to the cavity (6);
when the elastic ejecting piece (84) is in a natural state, the other end of the elastic ejecting piece (84) is abutted to the core body (81), and when the second sliding connection block (82) slides in the second sliding groove (831), the elastic ejecting piece (84) can be pushed, so that the elastic ejecting piece (84) extends towards the cavity (6) and ejects a workpiece.
5. The injection mold with the core pulling structure according to claim 4, wherein: the elastic ejection pieces (84) are multiple groups, and the multiple groups of elastic ejection pieces (84) are sequentially arranged along the second sliding groove (831).
6. The injection mold with the core pulling structure according to claim 3, wherein: interior oblique core block (83) are equipped with inboard water course (832) and water course interface (833) respectively, inboard water course (832) are located inside interior oblique core block (83), inboard water course (832) pass through water course interface (833) and outside intercommunication, first movable part (31) department has the confession water course interface (833) displacement dodges dodge hole (3111).
7. The injection mold with the core pulling structure according to claim 1, wherein: the core-pulling mechanism comprises a first side core-pulling mechanism (9), wherein the first side core-pulling mechanism (9) comprises
The first inclined guide rod (91) is arranged on the fixed die (4);
the first side core-pulling block (92) is arranged on the first movable part (31) in a sliding mode, the first inclined guide rod (91) penetrates through the first side core-pulling block (92) and is in mutual sliding fit, and the first side core-pulling block (92) can extend into the end part of the inclined section (62) in a reciprocating mode.
8. The injection mold with the core pulling structure according to claim 1, wherein: further comprising a second side core-pulling mechanism (10), the second side core-pulling mechanism (10) comprising
The second inclined guide rod (101) is arranged on the fixed die (4);
the second side core-pulling block (102) is arranged on the first movable part (31) in a sliding mode, the second inclined guide rods (101) penetrate through the second side core-pulling block (102) and are in mutual sliding fit, and the second side core-pulling block (102) can extend into the body section (61) in a reciprocating mode.
9. The injection mold with the core pulling structure according to claim 1, wherein: a distance pull rod (5) is arranged on the second movable part (32), and a positioning boss which is abutted and limited with the first movable part (31) is arranged on the distance pull rod (5).
10. The injection mold with the core pulling structure according to claim 1, wherein: the ejection mechanism (11) comprises a push plate assembly (111) movably arranged on the second movable part (32);
and the push rod assembly (112) is arranged on the push plate assembly (111), and the push rod assembly (112) penetrates through the first movable part (31) and the inner inclined core pulling mechanism (8) and extends into the cavity (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211167615.4A CN115384002B (en) | 2022-09-23 | 2022-09-23 | Injection mold with loose core structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211167615.4A CN115384002B (en) | 2022-09-23 | 2022-09-23 | Injection mold with loose core structure |
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| CN115384002A true CN115384002A (en) | 2022-11-25 |
| CN115384002B CN115384002B (en) | 2023-06-30 |
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Cited By (1)
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| CN121821715A (en) * | 2026-03-11 | 2026-04-10 | 浙江长江汽车电子有限公司 | Injection mold for mounting shell of automobile tail door switch and processing method thereof |
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| CN115384002B (en) | 2023-06-30 |
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