CN115384002B - Injection mold with loose core structure - Google Patents

Injection mold with loose core structure Download PDF

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Publication number
CN115384002B
CN115384002B CN202211167615.4A CN202211167615A CN115384002B CN 115384002 B CN115384002 B CN 115384002B CN 202211167615 A CN202211167615 A CN 202211167615A CN 115384002 B CN115384002 B CN 115384002B
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China
Prior art keywords
core
pulling
block
sliding
movable part
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CN115384002A (en
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王根年
朱克刚
谢敏
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Shenzhen Nabai Technology Co ltd
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Shenzhen Nabai Technology Co ltd
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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
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • 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 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, the first movable part and the fixed mold are mutually closed to form a cavity, and the cavity is provided with a main body section and an inclined section; the outer inclined core pulling mechanism is arranged at the fixed die, a first inclined channel for sliding the outer inclined core pulling mechanism is arranged at the fixed die, and the outer inclined core pulling mechanism enters the inclined section from the outer side in a reciprocating manner 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 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 manner through the second inclined channel so as to form the inner surface of the inclined part.

Description

Injection mold with loose core structure
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 can also be called injection molding, is a process for molding plastic workpieces by adopting a corresponding mold structure and a molding mode of injection and molding, has the advantages of high production speed, high production efficiency, accurate size of the workpieces and the like, and is suitable for mass production of products with complex shapes, namely the name of 'industrial mother'.
At present, the mould usually has two parts of cover half and movable mould that can open and shut each other, has the runner on the cover half, has seted up the recess on movable mould and the cover half respectively simultaneously, and when cover half and die matched with each other, two recesses amalgamate each other, form the die cavity that is consistent with the work piece shape, and fluid plastic gets into in the die cavity through the runner, through cooling, solidification forms the work piece, and then cover half and movable mould are opened, set up corresponding ejection mechanism on the movable mould, carry out ejecting with the work piece, realize the production action of mould.
For the related art, there is a shell workpiece, which has a main body portion and an inclined portion extending from one side of the main body portion outwards in an inclined manner, and the inner side and the outer side of the inclined portion are provided with feature profiles such as grooves, holes or bosses, so that in the actual forming process, the conventional die forming structure is difficult to realize high-quality forming of the workpiece due to irregular and complex workpiece structure.
Disclosure of Invention
In order to achieve high-quality molding of a lifting workpiece, the application provides an injection mold with a core pulling structure.
The application provides an injection mold with structure of loosing core adopts following technical scheme:
the injection mold 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 mutually 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 arranged 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 manner 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 and is provided with a second inclined channel for 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 manner through the second inclined channel so as to form the inner surface of the inclined part.
Through adopting above-mentioned technical scheme, conventional loose core movement is difficult to realize shaping to the slope portion that inclines put, here, through setting up first inclined channel and second inclined channel, can guide outer inclined loose core mechanism and interior inclined loose core mechanism incline movement respectively, realize carrying out the side to the characteristic on the slope portion and take out the shaping, satisfy the angle of placing of inclined portion, can realize the action of loosing core smoothly, simultaneously, because of the inside compact structure of mould, be difficult to install extra power supply in the mould inside, here, set up the movable mould into first movable part and the second movable part that can open and shut, and locate interior inclined loose core mechanism in second movable part department, make first movable part and second movable part in the open and shut in-process, can order about interior inclined loose core mechanism motion, the structure is ingenious and reasonable, just because the structure sets up rationally, can high-efficient cooperation between the mechanism, the shaping quality of product is ensured and promoted, the problem that causes the mould structure unreasonable and the work piece shaping quality is low because of the complex work piece shaping degree of difficulty is big has been overcome.
Preferably, the outer inclined core-pulling mechanism comprises a first core-pulling driving member arranged on the fixed die; the first sliding connecting block is connected with the first core-pulling driving piece, and the first core-pulling driving piece is used for driving the first sliding connecting block to reciprocate; the outer oblique core-pulling block is arranged in the first oblique channel in a sliding manner, 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 degree of freedom of motion for outer oblique loose core piece and first sliding connection piece, simultaneously under the lock joint effect and under the drive of first loose core actuating member, first sliding connection piece can drive outer oblique loose core piece 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; 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 provides the degree of freedom of motion for interior oblique loose core piece and second sliding connection piece, simultaneously under the lock joint effect and under the motion of core, the second sliding connection piece can drive interior oblique loose core piece and remove in the second inclined channel of slope, and the action is swift and ingenious.
Preferably, the inner inclined core-pulling mechanism further comprises an elastic ejection piece, the elastic ejection piece is movably arranged on the inner inclined core-pulling block, and one end of the elastic ejection piece extends to the cavity; when the elastic ejection piece is in a natural state, the other end of the elastic ejection piece is in butt joint with the core body, and when the second sliding connecting 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 tilting portion of work piece is because of the slope setting, and the tight movable mould of buckling more easily after the cooling shaping, if adopt on the basis of conventional ejecting mode, the easy strain work piece of trashing, cause shaping defect, at this moment, set up the ejecting piece of elasticity in the interior oblique loose core piece, can make the tilting portion of work piece separate with the movable mould, be favorable to the work piece drawing of patterns and shaping quality promotion, 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 groove.
Through adopting above-mentioned technical scheme, the in-process that the second sliding connection piece slided in the second spout can promote multiunit elasticity liftout piece in proper order, and multiunit elasticity liftout piece starts respectively, and then the tilting portion top of work piece is lifted off the movable mould to the subassembly, and the drawing of patterns action is more thorough and reliable.
Preferably, the inner inclined core-pulling block is respectively provided with an inner water channel and a water channel connector, the inner water channel is positioned inside the inner inclined core-pulling block, the inner water channel is communicated with the outside through the water channel connector, and the first movable part is provided with an avoidance hole for avoiding displacement of the water channel connector.
Through adopting above-mentioned technical scheme, including oblique loose core piece inside set up inboard water course, the accessible water course interface inserts the cooling water to in the inboard water course, realize cooling the work piece, at this in-process, because of interior oblique loose core piece can move, conventional water course setting mode is difficult to realize the access function, at this moment, through setting up the water course interface, the water course structure can be connected with outside pipe connection, be equivalent to introducing the pipeline inside the mould and connect, the hole is dodged in the cooperation, make the water course interface can obtain the travel space along with the removal of interior oblique loose core piece, realize the setting of inboard water course.
Preferably, the device further comprises a first side core pulling mechanism, wherein the first side core pulling mechanism comprises a first inclined guide rod and is arranged on the fixed die; the first side loose core block is arranged on the first movable part in a sliding mode, the first inclined guide rod penetrates through the first side loose core block and is matched with the first side loose core block in a sliding mode, and the first side loose core 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 the slope section tip, on the one hand, the tilting part of work piece generally has arc structure, and first side core-pulling block can correspond the adjustment profile to realize shaping the tip profile of the tilting part of work piece, on the other hand, the tip of tilting part can lock in movable mould department generally after cooling shaping, at this moment, drives first side core-pulling block and removes, can initiatively reduce the area of contact between work piece and the movable mould, so is favorable to the work piece drawing of patterns.
Preferably, the device 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; the second side loose core block is arranged on the first movable part in a sliding mode, the second inclined guide rod penetrates through the second side loose core block and is matched with the second side loose core block in a sliding mode, and the first side loose core block can extend into the body section in a reciprocating mode.
Through adopting above-mentioned technical scheme, the edge position of the body portion of work piece still can set up some characteristics generally, like breach, chimb etc. at this moment, under the drive of second oblique guide arm, can make the second loose core piece reciprocating motion, and then take shape the chimb at work piece edge.
Preferably, a distance pull rod is arranged on the second movable part, and a positioning boss which is in butt fit with the first movable part 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 control first movable part and the second movable part to make interior inclined core-pulling mechanism can remove in reasonable position, with the possibility that reduces the mechanism collision, the structure is practical.
Preferably, the device further comprises an ejection mechanism, wherein 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 the drive of push pedal subassembly, can order about push rod subassembly to carry out 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, so that the outer inclined core-pulling mechanism and the inner inclined core-pulling mechanism can be guided to move obliquely respectively, side drawing forming is carried out on the characteristics on the inclined part, the placing angle of the inclined part is met, core-pulling action can be smoothly realized, meanwhile, the movable die is set to be a first movable part and a second movable part which can be opened and closed, and the inner inclined core-pulling mechanism is arranged at the second movable part, so that 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, the mechanisms are not easy to interfere with each other, the mechanisms can be matched with each other efficiently, the forming quality of a product is ensured and improved, and the problems of unreasonable die structure and low forming quality of a workpiece due to large forming difficulty of a complex workpiece are overcome;
2. the inclined part of the workpiece is inclined, so that the movable die is easier to fasten after cooling and forming, if a conventional ejection mode is adopted, the workpiece is easy to be pulled to cause forming defects, at the moment, the elastic ejection piece is arranged in the inner inclined core-pulling block, the inclined part of the workpiece can be separated from the movable die, the demolding of the workpiece and the improvement of forming quality are facilitated, and the structure is ingenious and practical;
3. the first side core-pulling block can correspondingly adjust the outline on one hand so as to realize forming the end outline of the inclined part of the workpiece, and on the other hand, the end of the inclined part is usually buckled at the movable die after cooling forming, at the moment, the first side core-pulling block is driven to move, so that the contact area between the workpiece and the movable die can be actively reduced, and the workpiece demoulding is facilitated.
Drawings
Fig. 1 is a schematic view of the structure of a workpiece.
Fig. 2 is a schematic view of the structure of another view of the workpiece.
FIG. 3 is a schematic view of a mold in 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 structural view of an outer inclined core-pulling mechanism, an inner inclined core-pulling mechanism, a first side core-pulling mechanism and a second side core-pulling mechanism according to a preferred embodiment of the present application.
FIG. 6 is a schematic view of an outer inclined core-pulling mechanism according to a preferred embodiment of the present invention.
FIG. 7 is a schematic view of an inner inclined core-pulling mechanism according to a preferred embodiment of the present invention.
FIG. 8 is a schematic view of an inner inclined core-pulling mechanism according to another embodiment of the present invention.
Reference numerals illustrate:
1. a body portion; 1001. a flange;
2. an inclined portion; 21. a convex edge;
3. a movable mold; 31. a first movable portion; 311. a B plate; 3111. avoidance holes; 312. a movable mold core; 313. a second inclined channel; 314. a receiving groove; 32. a second movable portion; 321. a movable die base plate; 322. a cushion block; 323. a backing plate;
4. a fixed mold; 41. a fixed die seat plate; 42. a plate A; 43. a first inclined channel;
5. distance pull rods; 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. an outer inclined core pulling block; 731. a first chute;
8. an inner inclined core pulling mechanism; 81. a core; 82. the second sliding connecting block; 83. an inner inclined core pulling block; 831. a second chute; 832. an inner waterway; 833. a waterway interface; 84. an elastic ejection member; 841. a push rod; 842. a return spring;
9. a first side core pulling mechanism; 91. a first diagonal guide bar; 92. a first side core pulling block;
10. a second side core pulling mechanism; 101. a second diagonal guide bar; 102. a second side core pulling block;
11. an ejection mechanism; 111. a push plate assembly; 1111. a pushing plate; 1112. a push rod fixing plate; 112. a push rod assembly.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-8.
Referring to fig. 1 and 2, there is shown a shell workpiece, which includes a main body 1 and an inclined portion 2 connected to one side of the main body 1 and inclined relative to the main body 1, wherein a section of the inclined portion 2 away from the main body 1 has a flange 21 structure, and in the actual forming process, the flange 21 of the inclined portion 2 is fastened to one side of a movable mold 3 after cooling, so as to cause difficult demolding, and in this case, if the forced ejection mode is adopted for demolding, the integral structure of the mold may be damaged, resulting in low yield of the workpiece; meanwhile, the flange 1001 is provided on the side of the body portion 1 away from the inclined portion 2, which also makes it difficult to mold the workpieces with high efficiency and high quality, and the forming of the workpieces has a relatively high technical obstacle.
The embodiment of the application discloses an injection mold with a core pulling structure. Referring to fig. 3 and 4, the injection mold includes a movable mold 3 and a fixed mold 4 that are opened and closed, wherein in this embodiment, the fixed mold 4 includes a fixed mold base 41 and an a plate 42, and the a plate 42 is provided with a fixed mold groove and a hot runner system, 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, where the B plate 311 and the a plate 42 can be mutually closed, so that a cavity 6 is formed between the movable mold core 312 and a groove of the fixed mold 4.
In addition, the second movable portion 32 includes a movable die plate 321, a pad 322 fixed on the movable die plate 321, and a pad 323 fixed on the pad 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 post may be installed on the movable mold base 321, a guide sleeve may be installed on the B plate 311, and the first movable portion 31 and the second movable portion 32 may be guided to open and close by sliding fit between the guide post and the guide sleeve, so that the arrangement is in favor of matching with a corresponding mechanism, and a specific arrangement mode will be described later.
Here, in order for the corresponding mechanism to have reasonable movement displacement, the displacement interval between the first movable portion 31 and the second movable portion 32 needs to be limited; based on this, the second movable portion 32 is provided with a distance pull rod 5, one end of the distance pull rod 5 is fixedly installed at the pad 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 B plate 311, the distance pull rod 5 penetrates into the step hole, the positioning boss is in butt 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 shape the workpiece, the cavity 6 includes a body section 61 that shapes 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 inside the mold, and it should be explained that the extending direction of the body section 61 is parallel to the opening and closing surfaces between the fixed mold 4 and the movable mold 3, when the fixed mold 4 and the movable mold 3 are opened mutually, the tensile force applied to the body part 1 is basically consistent with the keeping away direction between the movable mold 3 and the fixed mold 4, and further, it is understood that the tensile force applied to the workpiece when the workpiece is opened is approximately in the normal direction of the surface of the workpiece, and the above-mentioned mold opening mode is not easy to strain the workpiece, that is, the surface of the body part 1 is not easy to be pulled; the molding quality of the body part 1 is ensured. Meanwhile, after the body section 61 is horizontally arranged, the inclined section 62 of the cavity 6 is inclined inside the die compared with the body section 61, and the end part of the inclined part 2 is provided with the convex edge 21, so that the workpiece is difficult to demould, and if the workpiece is forcibly ejected, the workpiece is inevitably strained, and further the forming quality is reduced.
Based on this, to promote the shaping quality of work piece, the mould still includes locating the outer inclined core-pulling mechanism 7 of cover half 4 department, locating the interior inclined core-pulling mechanism 8 of second movable part 32 department and locating the first side core-pulling mechanism 9 of first movable part 31 department. The outer inclined core-pulling mechanism 7, the inner inclined core-pulling mechanism 8 and the first side core-pulling mechanism 9 mold the inclined part 2 of the workpiece, and are used for improving the smoothness of the inclined part 2 during demolding.
In the process of the mutual die opening of the fixed die 4 and the movable die 3, in order to smoothly enable the workpiece to be demolded, 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 mutually opened, the second movable part 32 drives the inner inclined core-pulling mechanism 8 to be far 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 mutually opened, the first inclined core-pulling mechanism 9 is pulled towards the outside of the die, the inclined part 2 of the workpiece is loosened, and the workpiece demolding is facilitated.
Referring to fig. 4 and 5, specifically, the outer inclined core-pulling mechanism 7 is used for forming the outer surface of the inclined portion 2, wherein, 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 penetrates through the side edge of the a plate 42 and is vertically communicated with the inclined section 62 of the cavity 6.
The outer inclined core-pulling mechanism 7 comprises a first core-pulling driving member 71, a first sliding connection block 72 and an outer inclined core-pulling block 73, wherein the first core-pulling driving member 71 is fixedly installed at the A plate 42 of the fixed mold 4, the first core-pulling driving member 71 is used for outputting reciprocating power, a cylinder, an oil cylinder or a motor gear rack structure can be generally selected, and the structure capable of outputting repeated motion can be selected in an attempt mode, and the structure is selected as a hydraulic cylinder element in the embodiment to be taken as an example.
Referring to fig. 4 and 6, the first sliding connection block 72 is fixedly connected with a telescopic rod of the first core-pulling driving member 71, the first core-pulling driving member 71 is used for driving the first sliding connection block 72 to reciprocate, and the first sliding connection block 72 is provided with a buckling sliding block, and the buckling sliding block is generally in a T-shaped structure. In addition, the outer inclined core-pulling block 73 is slidably disposed in the first inclined channel 43, specifically, the outline of the outer inclined core-pulling block 73 is matched with the outline of the opening of the first inclined channel 43, the surface of the outer inclined core-pulling block 73 is slidably matched with the inner wall of the first inclined channel 43, and at this time, the outer inclined core-pulling block 73 can reciprocate from the outer side of the mold along the first inclined channel 43 into the inclined section 62.
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 chute 731, the outline of the notch of the first chute 731 is of a T-shaped structure, the buckling sliding block slides into the first chute 731 of the T-shaped structure, and the extending direction of the first chute 731 is matched with the inclination 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 chute 731 and is matched with the first sliding connecting block in a sliding way; it should be noted that, in other embodiments, the first chute 731 and the fastening slider may also have a dovetail-shaped structure, so that the structures that can be mutually fastened and simultaneously can also mutually slide may be selected; at this time, the outer oblique core-pulling block 73 reciprocates in the inclined first inclined passage 43 under the driving of the first slide connection block 72, and the first slide grooves 731 provide freedom of movement for the outer oblique core-pulling block 73 and the first slide connection block 72.
It should be noted that, the end of the outer inclined core-pulling block 73 inserted into the cavity 6 may be provided with a groove or a protrusion to form corresponding features on the outer surface of the inclined portion 2, and the specific forming structure may be correspondingly set according to actual requirements, which is not limited herein.
Referring to fig. 4 and 5, accordingly, the inner inclined core-pulling mechanism 8 is used to mold 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 sliding the inner inclined core-pulling mechanism 8, in this embodiment, the second inclined channel 313 is specifically disposed inside the movable mold core 312 and is vertically communicated with the inclined section 62 of the cavity 6, meanwhile, the first movable portion 31 is further provided with a containing groove 314 communicated with the second inclined channel 313, the inner inclined core-pulling mechanism 8 is located in the containing groove 314, and the containing 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 segment 62 through the second inclined passage 313 to achieve the shaping of the inside surface feature of the inclined portion 2. The inner inclined core-pulling device 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 a backing plate 323 of the second movable part 32, and the core body 81 is accommodated in the accommodating groove 314; the end of the core 81 away from the backing plate 323 has an inclined plane, the inclination of the inclined plane is matched with the inclination of the inclined end, the second sliding connection block 82 is fixedly installed at the core 81 and located on the inclined plane, at this time, the second sliding connection block 82 is in an inclined state, and the second sliding connection block 82 is in a T-shaped block structure in the embodiment.
In addition, the outer edge contour of the inner inclined core-pulling block 83 is adapted to the opening contour of the second inclined channel 313, and the surface of the inner inclined core-pulling block 83 is slidably abutted against the inner wall of the second inclined channel 313, and at this time, the inner inclined core-pulling block 83 is slidably disposed in the second inclined channel 313; meanwhile, the inner inclined core-pulling block 83 has a second chute 831, and the second chute 831 is also in a T-shaped structure in this embodiment, and the second sliding connection block 82 is located in the second chute 831 and is wedged with the second chute 831, at this time, the inner inclined core-pulling block 83 is fastened with the second sliding connection block 82 through the second chute 831, and the inner inclined core-pulling block 83 is slidably matched with the second sliding connection block 82.
Under the state that the first movable part 31 and the second movable part 32 are mutually closed, 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 connecting block 82, the second inclined channel 313 stretches into the inclined section 62 of the cavity 6 to form the inner surface of the workpiece, and according to the actual requirement of the workpiece characteristics, the end part of the inner inclined core pulling block 83 can be provided with the characteristics such as a groove or a boss so as to correspondingly form corresponding characteristics at the inner surface of the inclined part 2, and the specific forming structure is not particularly limited.
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 pulled away 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 pulled under the guiding of the second sliding chute 831, the inner inclined core pulling block 83 slides in the second inclined channel 313 and is pulled away from the cavity 6, the inner inclined core pulling block 83 releases the inner wall of the workpiece, a demolding moving space is provided for the inclined portion 2 of the workpiece, and the workpiece can be 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 still be wrapped at the movable mold core 312, and the inclined portion 2 may still cause strain when the workpiece is demolded, based on which, the inner inclined core-pulling mechanism 8 further includes an elastic ejector 84 movably disposed inside the inner inclined core-pulling block 83, for applying an ejector force to the inclined portion 2 of the workpiece, so that the inclined portion 2 of the workpiece is more beneficial to releasing the movable mold 3.
Wherein the elastic ejector 84 includes an ejector rod 841 and a return spring 842; in the concrete arrangement, firstly, an accommodating hole is arranged in the inner inclined core pulling block 83 in a penetrating way, and two ends of the accommodating hole are respectively communicated with the cavity 6 and the second sliding groove 831; then the ejector rod 841 can be movably inserted into the accommodating hole, the reset spring 842 is sleeved on the ejector rod 841, the accommodating hole is in a ladder shape, the circumferential direction of the ejector rod 841 is integrally connected with a stress boss, two ends of the reset spring 842 are respectively abutted against the ladder surface of the accommodating 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 leveled with the inner wall of the cavity 6, and the other end of the elastic ejection piece 84 is abutted against the core 81
Meanwhile, the end part of the ejector rod 841 is in a spherical surface structure, when the second sliding connecting block 82 slides in the second sliding chute 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 the inclined part 2 is ejected from the movable die 3, thereby being beneficial to demolding of the workpiece, reducing strain of the workpiece and improving the forming quality of the workpiece; after the workpiece is separated from the die, the second sliding connection block 82 is reset, and the ejector rod 841 extends to one end of the die cavity 6 under the drive of the reset spring 842 to keep the state of being level with the inner wall of the die cavity 6, so that the obstruction to the workpiece during forming is reduced.
Further, the elastic ejection members 84 may be further set into multiple groups, such as two groups, three groups or four groups, where the specific number of the elastic ejection members 84 is not limited, and the multiple groups of elastic ejection members 84 are sequentially set along the second chute 831, so that the second sliding connection block 82 can sequentially push the multiple groups of elastic ejection members 84 in the sliding process, the multiple groups of elastic ejection members 84 are respectively started, and the component gradually pushes the inclined portion 2 of the workpiece away from the movable mold 3, so that the inclined portion 2 of the workpiece is not easily damaged, and the inclined portion 2 is more beneficial to releasing the movable mold 3.
Referring back to fig. 5, the first side core-pulling mechanism 9 also participates in the formation of the inclined portion 2, and specifically, the first side core-pulling mechanism 9 is used for forming the profile of the inclined portion 2 at the end far from the body portion 1; the first side core pulling mechanism 9 comprises a first inclined guide rod 91 and a first side core pulling block 92, and the first inclined guide rod 91 is fixedly arranged 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, and typically, a guide block may be mounted on the B plate 311 and disposed on both sides of the first side core-pulling block 92, and the first side core-pulling block 92 is mounted by slidably abutting both sides of the first side core-pulling block 92 against the guide block; the first side core-pulling block 92 is provided with an inclined guide hole in a penetrating manner, the first inclined guide rod 91 penetrates through the first side core-pulling block 92 through the inclined guide hole and is matched with the first side core-pulling block in a sliding manner, and in the process that the fixed die 4 and the movable die 3 are mutually opened and closed, 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 manner, so that the end part of a workpiece is molded; in the present embodiment, the end of the inclined portion 2 has an outer convex arc shape, so the first side core-pulling block 92 has a concave surface feature to adapt to the structure of the inclined portion 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 so as 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 includes a second side core-pulling mechanism 10, and the second side core-pulling mechanism 10 is disposed 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 profile of the flange 21 also causes a certain difficulty in demolding the workpiece. 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, where the second inclined guide rod 101 is fixedly mounted at the a plate 42 of the fixed mold 4, the second side core-pulling block 102 is slidably mounted on the first movable portion 31 in a manner consistent with the first side core-pulling block 92, the second side core-pulling block 102 also has inclined guide holes, and the second inclined guide rod 101 penetrates the second side core-pulling block 102 and is slidably engaged with each other, and a flange forming groove is concavely provided at the second side core-pulling block 102 for forming the flange 1001 feature on the body portion 1.
On the one hand, in the process of opening and closing the fixed die 4 and the movable die 3, the second side core-pulling block 102 can extend into the body section 61 in a reciprocating manner so as to realize workpiece forming; on the other hand, when the second side core block 102 is away from the body section 61, the flange 1001 on the body portion 1 is released, facilitating the demolding of the workpiece.
Referring to fig. 7 and 8, in a specific arrangement, the hot runner system of the mold is communicated with the body section 61 of the cavity 6, and at this time, because the inclined section 62 is far away from the entry point of the plastic, the conventional cooling manner cannot achieve the required cooling effect, and therefore, in order to further improve the molding quality of the workpiece, the water cooling system is disposed at the inner core-pulling mechanism, but the inner core-pulling mechanism needs to be moved repeatedly, and the conventional water channel setting manner is difficult to realize the arrangement inside the mold, so as to overcome the technical obstacle.
The inner inclined core-pulling block 83 is respectively provided with an inner water channel 832 and a water channel connector 833, wherein the inner water channel 832 is positioned inside the inner inclined core-pulling block 83, the inner water channel 832 is distributed around the inner inclined core-pulling block 83, in the setting process, the main body outline of the inner water channel 832 can be molded in a drilling mode firstly, then the excessive opening is plugged by the plug, and the inner water channel 832 is closed, and at the moment, the inner water channel 832 is provided with a water outlet and a water inlet.
The water channel interfaces 833 are used for communicating the inner water channel 832 with the outside, in this embodiment, two water channel interfaces 833 are fixedly installed at the inner inclined core pulling block 83, and the two water channel interfaces 833 are communicated with the water inlet and the water outlet of the inner water channel 832, the water channel interfaces 833 can be connected with a water delivery hose, at this time, a through hole is formed at the side part of the mold, the water delivery hose is introduced into the water channel interfaces 833 from the outside of the mold through the through hole, and the other end of the water delivery hose is communicated with the mold temperature machine, so as to realize the circulation and transportation of cooling water.
Further, in order to meet the requirement of stable water delivery of the inner inclined core-pulling block 83 in the moving process, the B plate 311 of the first movable part 31 is penetrated and provided with an avoidance hole 3111 for avoiding displacement of the water supply channel interface 833, and the avoidance hole 3111 is matched, so that the water supply channel interface 833 can obtain a moving space along with movement of the inner inclined core-pulling block 83, 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, where the ejection mechanism 11 includes a push plate assembly 111 and a push rod assembly 112, where 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 may be movably disposed at the second movable portion 32 by additionally installing a guide post, the push plate 1111 is connected to the injection molding machine, and under the pushing of the injection molding machine, the push plate assembly 111 may be pushed to reciprocate.
The push rod assembly 112 comprises a plurality of push rods, one ends of the push rods are fixedly arranged at the push rod fixing plate 1112, the other ends of the push rods extend into the cavity 6, a plurality of pushing holes are specifically formed in the first movable part 31 in a penetrating mode, the pushing holes can be formed in the core 81, the movable die core 312 and the movable die 3 fixing plate respectively, the push rods penetrate through the core 81, the movable die core 312, the movable die 3 fixing plate and other parts through the pushing holes, at the moment, 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, the push rod assembly 111 can be driven to eject a workpiece under the driving of the push plate assembly 111 in a reciprocating mode, and the process is rapid and efficient.
The implementation principle of the injection mold with the core-pulling structure is as follows: through setting up first inclined channel 43 and second inclined channel 313, can guide outer inclined core-pulling mechanism 7 and interior inclined core-pulling mechanism 8 tilt motion respectively, realize carrying out the side to the inside and outside both sides of tilting portion 2 and take out the shaping, satisfy tilting portion 2's angle of placing, can realize the action of loosing core smoothly, convenience when the work piece drawing of patterns obtains promoting.
Meanwhile, the arrangement of the elastic ejection piece 84 can separate the inclined part 2 of the workpiece from the movable die 3 independently, so that the workpiece is further convenient to be demolded, and the workpiece is not easy to be pulled; in addition, the inside of the inner inclined core-pulling block 83 is provided with the inner water channel 832, and the inner water channel is matched with the avoiding hole 3111, so that the water channel connector 833 can obtain a moving space along with the movement of the inner inclined core-pulling block 83, thereby realizing efficient cooling and improving the forming quality of the workpiece.
The mechanisms are not easy to interfere with each other to block, the mechanisms can be matched with each other efficiently, the molding quality of products is guaranteed and improved, and the problems of unreasonable die structure and low molding quality of the workpieces caused by high molding difficulty of complex workpieces are solved.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (7)

1. Injection mold with loose core structure, including movable mould (3) and cover half (4) that open and shut each other, its characterized in that:
the movable die (3) is provided with a first movable part (31) and a second movable part (32) which can be separated from each other and mutually closed, the first movable part (31) and the fixed die (4) are mutually closed to form a die cavity (6), the die cavity (6) is provided with a body section (61) for forming the body part (1) and an inclined section (62) for forming the inclined part (2), the body section (61) is horizontally arranged in the die, and the inclined section (62) is communicated with the body section (61) and is obliquely arranged in the die 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 sliding the outer inclined core pulling mechanism (7) 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 manner through the first inclined channel (43) so as to form the outer surface of the inclined part (2);
an inner inclined core-pulling mechanism (8) arranged at the second movable part (32), wherein the first movable part (31) is provided with a second inclined channel (313) for the sliding fit of the inner inclined core-pulling mechanism (8), and the inner inclined core-pulling mechanism (8) enters the inclined section (62) from the inner side in a reciprocating manner through the second inclined channel (313) so as to form the inner surface of the inclined part (2);
the inner inclined core pulling mechanism (8) comprises a core body (81) fixedly connected to the second movable part (32);
a second sliding connection block (82) provided on the core (81);
the inner inclined core-pulling block (83) is arranged in the second inclined channel (313) in a sliding manner, 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 (82);
the inner inclined core pulling mechanism (8) also comprises an elastic ejection piece (84),
the elastic ejection piece (84) is movably arranged on the inner inclined core-pulling block (83), and one end of the elastic ejection piece (84) extends to the cavity (6);
when the elastic ejection piece (84) is in a natural state, the other end of the elastic ejection piece (84) is in abutting connection with the core body (81), and when the second sliding connecting block (82) slides in the second sliding groove (831), the elastic ejection piece (84) can be pushed, so that the elastic ejection piece (84) extends towards the die cavity (6) and ejects a workpiece;
the elastic ejection pieces (84) are multiple groups, and the elastic ejection pieces (84) are sequentially arranged along the second sliding groove (831).
2. The injection mold with a core pulling structure according to claim 1, wherein: the outer inclined core pulling mechanism (7) comprises a first core pulling driving piece (71) and 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 inclined core pulling block (73) is arranged in the first inclined channel (43) in a sliding mode, a first sliding groove (731) is formed in the outer inclined core pulling block (73), and one end of the outer inclined 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.
3. The injection mold with a core pulling structure according to claim 1, wherein: the inner inclined core pulling block (83) is provided with an inner water channel (832) and a water channel connector (833) respectively, the inner water channel (832) is located inside the inner inclined core pulling block (83), the inner water channel (832) is communicated with the outside through the water channel connector (833), and the first movable part (31) is provided with an avoidance hole (3111) for avoiding displacement of the water channel connector (833).
4. The injection mold with a core pulling structure according to claim 1, wherein: the novel plastic core-pulling device also 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 loose core 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 loose core block (92) and is matched with the first side loose core block in a sliding mode, and the first side loose core block (92) can extend into the end portion of the inclined section (62) in a reciprocating mode.
5. The injection mold with a core pulling structure according to claim 1, wherein: the device also comprises a second side core-pulling mechanism (10), wherein the second side core-pulling mechanism (10) comprises
The second inclined guide rod (101) is arranged on the fixed die (4);
the second side loose core block (102) is arranged on the first movable part (31) in a sliding mode, the second inclined guide rod (101) penetrates through the second side loose core block (102) and is matched with the second side loose core block in a sliding mode, and the second side loose core block (102) can extend into the body section (61) in a reciprocating mode.
6. The injection mold with a core pulling structure according to claim 1, wherein: the second movable part (32) is provided with a distance pull rod (5), and the distance pull rod (5) is provided with a positioning boss which is in abutting limiting connection with the first movable part (31).
7. The injection mold with a core pulling structure according to claim 1, wherein: the device also comprises an ejection mechanism (11), wherein the ejection mechanism (11) comprises a push plate assembly (111) movably arranged on the second movable part (32);
and a push rod assembly (112) arranged on the push plate assembly (111), wherein 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).
CN202211167615.4A 2022-09-23 2022-09-23 Injection mold with loose core structure Active CN115384002B (en)

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Application Number Priority Date Filing Date Title
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CN115384002B true CN115384002B (en) 2023-06-30

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201471696U (en) * 2009-06-18 2010-05-19 徐茂盛 Cooling water channel structure of inclined roof pulling core
CN202129948U (en) * 2011-06-28 2012-02-01 宁波宇升模业有限公司 Mechanism capable of synchronously pulling core from inner side and outer side of automobile wheel injection mould
CN202412613U (en) * 2011-12-30 2012-09-05 东莞市事通达机电科技有限公司 Injection mold of face cover of remote controller of manipulator
CN209238887U (en) * 2018-10-11 2019-08-13 艺威（天津）汽车科技有限公司 A kind of automobile die automatic unloading device
CN216885056U (en) * 2022-01-19 2022-07-05 厦门盛宏欣科技有限公司 Plastic seat injection mold
CN114919140A (en) * 2022-06-16 2022-08-19 苏州硕贝德通讯技术有限公司 Mould for machining router shell based on inner and outer sliding block core-pulling mechanism

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