CN110919984A - Micro-inverted buckle position demoulding structure and method for forming injection molding by using same - Google Patents
Micro-inverted buckle position demoulding structure and method for forming injection molding by using same Download PDFInfo
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- CN110919984A CN110919984A CN201911381108.9A CN201911381108A CN110919984A CN 110919984 A CN110919984 A CN 110919984A CN 201911381108 A CN201911381108 A CN 201911381108A CN 110919984 A CN110919984 A CN 110919984A
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229920003023 plastic Polymers 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 12
- 230000001154 acute effect Effects 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims 3
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 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
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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
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
Abstract
A micro-inverted buckle position demoulding structure and a method for forming an injection molding part thereof are provided, the micro-inverted buckle position demoulding structure comprises a lower mould part, an upper mould part, a buckle position demoulding component and a support part, an injection molding space is formed between the upper mould part and the lower mould part, the lower mould part is provided with a mounting groove, the mounting groove is upwards communicated to the injection molding space, the buckle position demoulding component comprises an insert and a spring top, the insert and the spring top are both arranged in the mounting groove and are mutually abutted along the horizontal direction, the insert is provided with a first gap part, the spring top is provided with a second gap part, the first gap part and the second gap part are adjacently arranged and form a hook groove, the hook groove is communicated with the injection molding space, the insert is provided with a concave groove extending along the vertical direction, the concave groove is provided with an upper wall surface, the spring top is provided with a convex bag protruding towards the insert from the side wall of the spring top, the convex bag is positioned in the concave groove, the convex bag can be moved out of, the lower end of the spring top is arranged in the spring top mounting groove.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to a micro-inverted buckle position demolding structure and a method for molding an injection molding piece by using the same.
Background
In the prior art, a connector generally includes a plastic body and hardware embedded in the plastic body, the hardware is generally formed by stamping a metal plate, and the plastic body is generally formed by injection molding. The connector is mainly used for connecting two active devices to realize current or signal transmission, and is commonly called as: the connector and the socket are connected in a pluggable and interfitting manner. In order to realize the stability of the plug and the socket after butt joint, a barb-shaped hook is generally formed on one plastic body, a groove-shaped or through hole-shaped hanging table is formed on the other plastic body, and the stable butt joint of the plug and the socket is realized through the hook and the hanging table buckle. One type of hook structure is designed with a slanted angle (less than ninety degrees) in the prior art, however, such slanted hooks present demolding difficulties during injection molding. Although the industry has solved the demoulding mode of this kind of slope couple, the structure is generally comparatively loaded down with trivial details, and mould cost of manufacture is very high, and comparatively complicated mould structure can break down and need bigger maintenance cost again easily.
In view of the above, it is desirable to provide a new mold fastening and demolding structure to solve the above problems.
Disclosure of Invention
The invention aims to provide a micro-inverted buckle position demoulding structure and a method for forming an injection molding by using the micro-inverted buckle position demoulding structure, which can simplify demoulding of a mould.
In order to achieve the purpose, the invention adopts the following technical scheme:
a mold buckling position demolding structure comprises a lower mold part, an upper mold part, a buckling position demolding assembly and a support piece, wherein an injection molding space is formed between the upper mold part and the lower mold part, the lower mold part is provided with a buckling position demolding assembly installing groove extending along the vertical direction, the buckling position demolding assembly installing groove penetrates upwards to the injection molding space, the buckling position demolding assembly installing groove penetrates downwards to the lower surface of the lower mold part, the support piece is arranged on the lower side of the lower mold part and is separated from the lower mold part by a certain distance, the buckling position demolding assembly comprises an insert and a spring top, the insert and the spring top are both installed in the buckling position demolding assembly installing groove and are mutually abutted along the horizontal direction, the insert and the spring top are both abutted against the inner wall surface of the buckling position demolding assembly installing groove, the upper end of the insert is provided with a first notch part, and the upper end of the spring top is provided with a second notch part, the first notch portion and the second notch portion are adjacently arranged and form a hook groove, the hook groove is communicated with the injection molding space, the insert is provided with a convex portion, the inner wall of the buckling demolding assembly mounting groove corresponds to the convex portion, the convex portion is matched with the concave portion, the insert is provided with a concave groove extending along the up-down direction, the concave groove is provided with an upper wall face, the ejection top is provided with a convex bag protruding from the side wall of the ejection top towards the insert direction, the convex bag is located in the concave groove, the convex bag can be moved out of the concave groove along the upper wall face, the support is provided with an ejection top mounting groove extending along the up-down direction and penetrating through the upper surface of the support, and the lower end of the ejection top is mounted in the ejection top mounting groove.
Furthermore, the upper wall surface is inclined, and the upper wall surface extends downwards from the side wall of the insert along the concave direction of the concave groove.
Further, the convex hull is arc-shaped.
Further, the first notch portion has a first bottom surface and a first side surface, the first bottom surface extends horizontally, and the first side surface is perpendicular to the first bottom surface.
Furthermore, the second notch portion has a second bottom surface and a second side surface, the second bottom surface extends horizontally, the second side surface extends obliquely, and an acute angle is formed between the second side surface and the second bottom surface.
Further, the rigidity strength of the insert is greater than that of the spring top.
Furthermore, the mold buckling position demolding structure further comprises an ejection supporting block, the ejection supporting block is installed in the ejection mounting groove, the ejection supporting block and the lower end portion of the ejection are mutually abutted along the horizontal direction, and the lower end portion of the ejection and the ejection supporting block are both abutted against the side wall surface of the ejection mounting groove.
Furthermore, the supporting member comprises a first supporting member and a second supporting member, the first supporting member is located on the lower side of the lower die member and is separated from the lower die member by a certain distance, the spring top mounting groove is formed in the first supporting member, and the second supporting member is located on the lower side of the first supporting member and is abutted to the first supporting member.
Furthermore, the top wall of the insert and the top wall of the spring top are both located in the injection molding space and located on the same horizontal plane.
A method for forming an injection molding part by using a micro-inverted buckle position demoulding structure comprises the following steps:
(1) the lower die part is provided with a buckling demolding assembly installing groove extending along the up-down direction, the buckling demolding assembly comprises an insert and a spring top, the insert and the spring top are installed on the buckling demolding assembly installing groove, the insert and the spring top are mutually abutted along the horizontal direction, the insert is provided with a convex part, the inner wall of the buckling demolding assembly installing groove is provided with a concave part corresponding to the convex part, the convex part is matched with the concave part, the upper end part of the insert is provided with a first notch part, the upper end part of the spring top is provided with a second notch part, the first notch part and the second notch part are adjacently arranged and form a hook groove, the insert is provided with a concave groove extending along the up-down direction, the concave groove is provided with an upper wall surface, the spring top is provided with a convex bag protruding towards the insert from the side wall of the spring top, and the convex bag is positioned in the concave groove, the supporting piece is positioned on the lower side of the lower die and is separated from the lower die by a certain distance, the supporting piece is provided with a spring top mounting groove which extends along the vertical direction and penetrates through the upper surface of the supporting piece, and the lower end part of the spring top is mounted in the spring top mounting groove;
(2) the upper die part and the lower die part are assembled to form an injection molding space, the injection molding space is communicated with the hook groove, a plastic solution is injected into the injection molding space to form an injection molding part, the injection molding part comprises an injection molding part body and a hook structure, the injection molding part body is formed in the injection molding space, the hook structure is formed in the hook groove, the hook structure protrudes downwards from the lower wall surface of the injection molding part body, the hook structure comprises a front wall surface, a rear wall surface and a bottom wall surface, an acute angle is formed between the rear wall surface and the lower wall surface of the injection molding part body, the first bottom surface of the first notch part is attached to the partial bottom wall surface of the hook structure, the first side surface of the first notch part is attached to the front wall surface of the hook structure, and the second bottom surface of the second notch part is attached to the partial bottom wall surface of the hook structure, the second side surface of the second notch part is attached to the rear wall surface of the hook structure, and the top wall of the insert and the top wall of the spring top are both attached to the lower wall surface of the injection molding part body;
(3) the upper die part and the lower die part are opened, the elastic top is upwards pushed and propped against the injection molding part body, the hook structure is separated from the first gap part, the convex hull slowly moves upwards in the concave groove until contacting with the upper wall surface of the concave groove, the elastic top is continuously pushed and propped upwards, the convex hull slowly moves along the upper wall surface, and at the moment, the second side surface of the second gap part is not separated from the rear wall surface of the hook structure;
(4) the elastic top is continuously pushed upwards, the rigid strength of the insert is greater than that of the elastic top, so that the convex hull can move out of the concave groove and can continuously and slowly move upwards along the side wall surface of the insert after moving out of the concave groove, the second side surface of the second notch part is slowly separated from the rear wall surface of the hook structure in the process that the convex hull continuously moves upwards along the side wall surface of the insert, at the moment, the lower end part of the elastic top tends to move towards the direction of the insert, and the elastic top supporting block is positioned in the elastic top mounting groove and prevents the lower end part of the elastic top from moving towards the direction of the insert;
(5) and when the rear wall surface of the hook structure is completely separated from the second side surface of the second gap part, the upward pushing of the elastic top is stopped, the convex hull moves downwards into the concave groove, the elastic top resets, and the first gap part and the second gap part form the hook groove again.
The invention has the beneficial effects that: the demoulding structure is buckled on the mould and matched with the upper mould part and the lower mould part to realize demoulding of the inclined hook structure, the performance is stable, the structure is simple, and the whole manufacturing cost of the mould is low.
Drawings
Fig. 1 is a cross-sectional view of the micro-undercut position demolding structure of the present application, wherein the cutting position is the ejection location, and the cutting direction is the up-down direction, so as to show the structure of the ejection, the position of the ejection in the mold, and the matching position relationship between the ejection and the injection molded product, and show a state diagram when the ejection is not ejected;
FIG. 2 is an enlarged view of the structure encircled in FIG. 1, and is used for showing the matching position relationship of the ejector and the injection-molded product when the ejector is not ejected in an enlarged manner;
fig. 3 is a schematic view of the cross-sectional view of fig. 1 in a state where the injection molded product is ejected upward, further showing a state where the ejector is not peeled from the injection molded product.
FIG. 4 is an enlarged view of the structure encircled in FIG. 3, showing in an enlarged manner the state in which the ejector pins are ejected upward and are not peeled off from the injection-molded product;
FIG. 5 is a schematic view of FIG. 4 showing the ejection of the ejector further upward until the injection molded product is completely separated from the ejector;
FIG. 6 is a further enlarged view of the structure within the dashed circle in the schematic diagram of FIG. 5;
FIG. 7 is a schematic view of the state in which the ejector completely separated from the injection-molded product is moved down to its original position (when the ejector is returned to the mold-closed injection-molded state) in the schematic view of FIG. 6;
FIG. 8 is an isolated schematic view of the injection molded product in the perspective of the cross-sectional view of FIG. 1.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 8, the mold fastening and demolding structure of the present invention includes a lower mold member 1, an upper mold member 2 clamped with the lower mold member 1, and a fastening and demolding assembly assembled in the lower mold member 1 and cooperating with the lower mold member 1. When the lower mold part 1 and the upper mold part 2 are closed, an injection space (not labeled) is formed between the upper mold part 2 and the lower mold part 1. The lower module 1 is provided with a buckling demolding assembly mounting groove (not marked) extending in the up-down direction, the buckling demolding assembly mounting groove penetrates upwards to the injection molding space, and the buckling demolding assembly mounting groove penetrates downwards through the lower surface of the lower module 1. Detain a drawing of patterns subassembly and include mold insert 3 and bullet top 4, mold insert 3 all installs in detaining a drawing of patterns subassembly mounting groove and along the mutual butt of horizontal direction with bullet top 4, and mold insert 3 all supports to lean on in the internal face of detaining a drawing of patterns subassembly mounting groove with bullet top 4, and the roof of mold insert 3 and the roof of bullet top 4 all are located the space of moulding plastics and are in on the same horizontal plane. The upper end of mold insert 3 is provided with first breach portion, and the upper end of bullet top 4 is provided with second breach portion, and first breach portion sets up and forms couple groove 8 with second breach portion is adjacent, and couple groove 8 link up with the space of moulding plastics. The lower end of the insert 3 is provided with a protrusion 31 protruding in the horizontal direction, the inner wall of the buckling demolding assembly mounting groove of the lower mold 1 is provided with a recess corresponding to the protrusion 31, and the protrusion 31 is matched with the recess, so that the insert 3 cannot move upwards along the buckling demolding assembly mounting groove under the action of external force. The insert 3 is provided with a recessed groove 32 extending in the up-down direction, the recessed groove 32 penetrates the lower surface of the insert 3 downward, the recessed groove 32 has an upper wall surface 33, the upper wall surface 33 is inclined, the upper wall surface 33 extends downward from the side wall of the insert 3 in the recessed direction of the recessed groove 32, and the inclined upper wall surface 33 facilitates the external structure to move out of the recessed groove 32 from the recessed groove 32 along the upper wall surface 33. The concave groove 32 is provided adjacent to the spring top 4, and the first notch portion and the concave groove 32 are provided at upper and lower ends of the insert 3 in the vertical direction. The bullet top 4 is provided with a convex hull 41, the convex hull 41 protrudes from the side wall of the bullet top 4 to the direction of the insert 3, the convex hull 41 is positioned in the concave groove 32 of the insert 3, when the bullet top 4 moves up and down relative to the insert 3, the convex hull 41 can move up and down in the concave groove 32, the convex hull 41 is arc-shaped, that is, the convex hull 41 has an arc-shaped outer wall surface, and the arc-shaped outer wall surface is convenient for the convex hull 41 to move out of the concave groove 32 from the concave groove 32 along the inclined upper wall surface 33. For the sake of description, the design also shows the injection-molded part 5 formed after molding. As shown in fig. 8, the injection molded part 5 includes an injection molded part body 51 and a hook structure 52 formed by protruding downward from a lower wall surface of the injection molded part body 51, the injection molded part body 51 has a docking cavity 50 opening forward, the hook structure 52 includes a front wall surface 53, a rear wall surface 54 and a bottom wall surface 55, and an acute angle is formed between the rear wall surface 54 and the lower wall surface of the injection molded part body 51. And when the mold is closed, injecting plastic liquid into the injection molding space to form an injection molding part 5, and forming a hook structure 52 in the hook groove. The first notch portion has a first bottom surface and a first side surface, the first bottom surface extends horizontally, the first side surface is perpendicular to the first bottom surface, the first bottom surface is attached to a part of the bottom wall surface 55 of the hook structure 52, and the first side surface is attached to the front wall surface 53 of the hook structure 52. The second notch portion has a second bottom surface and a second side surface, the second bottom surface extends horizontally, the second side surface extends obliquely, an acute angle is formed between the second side surface and the second bottom surface, the second bottom surface is attached to a part of the bottom wall surface 55 of the hook structure 52, and the second side surface is attached to the rear wall surface 54 of the hook structure 52.
The mold fastening and demolding structure further comprises a spring top supporting block 6 and a supporting piece 7, wherein the supporting piece 7 comprises a first supporting piece 71 and a second supporting piece 72, the first supporting piece 71 is located on the lower side of the lower mold part 1 and is separated from the lower mold part 1 by a certain distance, and the second supporting piece 72 is located on the lower side of the first supporting piece 71 and is abutted to the first supporting piece 71. The first supporting piece 71 is provided with a spring top mounting groove which extends along the vertical direction and penetrates through the upper surface of the first supporting piece 71, the lower end part of the spring top 4 is mounted in the spring top mounting groove, the spring top supporting block 6 is also mounted in the spring top mounting groove, the spring top supporting block 6 and the lower end part of the spring top 4 are mutually abutted along the horizontal direction, and the lower end part of the spring top 4 and the spring top supporting block 6 are both abutted against the side wall surface of the spring top mounting groove.
The method of forming the injection-molded part 5 is described below:
(1) the lower module 1 is provided with a buckling demoulding component mounting groove extending along the up-down direction, the buckling demoulding component comprises an insert 3 and a spring top 4, the insert 3 and the spring top 4 are mounted in the buckling demoulding component mounting groove, the insert 3 and the spring top 4 are mutually abutted along the horizontal direction, the insert 3 is provided with a bulge 31, the inner wall of the buckling demoulding component mounting groove is provided with a concave part corresponding to the bulge 31, the bulge 31 is matched with the concave part, the upper end part of the insert 3 is provided with a first notch part, the upper end part of the spring top 4 is provided with a second notch part, the first notch part and the second notch part are adjacently arranged and form a hook groove 8, the insert 3 is provided with a concave groove 32 extending along the up-down direction, the concave groove 32 is provided with an upper wall surface 33, the spring top 4 is provided with a convex bag 41 protruding towards the insert 3 from the side wall, the convex bag 41 is positioned in the concave groove 32, the support 7 is positioned at the lower side of the, the supporting piece 7 is provided with a spring top mounting groove which extends along the up-down direction and penetrates through the upper surface of the supporting piece, and the lower end part of the spring top 4 is mounted in the spring top mounting groove;
(2) the upper die part 2 and the lower die part 1 are assembled to form an injection molding space, the injection molding space is communicated with the hook groove 8, injection molding liquid is injected into the injection molding space to form an injection molding part 5, the injection molding part 5 comprises an injection molding part body 51 and a hook structure 52, the injection molding part body 51 is formed in the injection molding space, the hook structure 52 is formed in the hook groove 8, the hook structure 52 protrudes downwards from the lower wall surface of the injection molding part body 51, the hook structure 52 comprises a front wall surface 53, a rear wall surface 54 and a bottom wall surface 55, an acute angle is formed between the rear wall surface 54 and the lower wall surface of the injection molding part body 51, a first bottom surface of the first notch part is attached to a part of the bottom wall surface 55 of the hook structure 52, a first side surface of the first notch part is attached to the front wall surface 53 of the hook structure 52, a second bottom surface of the second notch part is attached to the part of the bottom wall surface 55 of the hook structure 52, a second side surface of the, the top wall of the insert 3 and the top wall of the spring top 4 are both attached to the lower wall surface of the injection molding part body 51;
(3) the upper mold part 2 and the lower mold part 1 are opened, the elastic top 4 is upwards pushed, the elastic top 4 upwards pushes the injection molding part body 51, the hook structure 52 is separated from the first notch part, the convex hull 41 slowly moves upwards in the concave groove 32 until contacting with the upper wall surface 33 of the concave groove 32, the elastic top 4 is continuously pushed upwards, the convex hull 41 slowly moves along the upper wall surface 33, and at the moment, the second side surface of the second notch part is not separated from the rear wall surface 54 of the hook structure 52;
(4) the elastic top 4 is continuously pushed upwards, because the rigidity strength of the insert 3 is greater than that of the elastic top 4, the convex hull 41 can move out of the concave groove 32 and can continuously and slowly move upwards along the side wall surface of the insert 3 after moving out of the concave groove 32, in the process that the convex hull 41 continuously moves upwards along the side wall surface of the insert 3, the second side surface of the second gap part is slowly separated from the rear wall surface 54 of the hook structure 52, at the moment, the lower end part of the elastic top 4 tends to move towards the direction of the insert 3, and the elastic top supporting block 6 is positioned in the elastic top mounting groove and prevents the lower end part of the elastic top 4 from moving towards the direction of the insert 3;
(5) when the rear wall surface 54 of the hook structure 52 is completely separated from the second side surface of the second notch portion, the elastic top 4 stops being pushed upwards, the convex hull 41 moves downwards into the concave groove 32, the elastic top 4 is reset, and the first notch portion and the second notch portion form the hook groove 8 again.
The invention realizes the demoulding of the inclined hook structure 52 by the mould buckling position demoulding structure and the matching of the upper mould part 2 and the lower mould part 1, and has stable performance, simple structure and low integral manufacturing cost of the mould.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a little back-off detains a demoulding structure, its includes lower module, goes up the module, detains a drawing of patterns subassembly and support piece, go up the module with form the space of moulding plastics down between the module, lower module is provided with along the position drawing of patterns subassembly mounting groove that detains that extends from top to bottom, detain a drawing of patterns subassembly mounting groove upwards link up to the space of moulding plastics, detain a drawing of patterns subassembly mounting groove and run through downwards the lower surface of lower module, support piece set up in the downside of lower module and with the module is separated by certain distance down, its characterized in that: the buckling demolding assembly comprises an insert and a spring top, the insert and the spring top are both installed in the buckling demolding assembly installation groove and are mutually abutted along the horizontal direction, the insert and the spring top are both abutted against the inner wall surface of the buckling demolding assembly installation groove, the upper end part of the insert is provided with a first notch part, the upper end part of the spring top is provided with a second notch part, the first notch part and the second notch part are adjacently arranged and form a hook groove, the hook groove is communicated with the injection molding space, the insert is provided with a bulge part, the inner wall of the buckling demolding assembly installation groove is provided with a concave part corresponding to the convex part, the convex part is matched with the concave part, the insert is provided with a concave groove extending along the vertical direction, the concave groove is provided with an upper wall surface, and the spring top is provided with a convex bag protruding towards the insert from the side wall of the spring top, the convex closure is located in the concave groove, the convex closure can be moved out along the upper wall surface of the concave groove, the supporting piece is provided with an elastic ejection mounting groove which extends along the vertical direction and penetrates through the upper surface of the supporting piece, and the lower end part of the elastic ejection is mounted in the elastic ejection mounting groove.
2. The micro-undercut position demolding structure of claim 1, wherein: the upper wall surface is inclined and extends downwards from the side wall of the insert along the concave direction of the concave groove.
3. The micro-undercut position demolding structure of claim 1, wherein: the convex hull is arc-shaped.
4. The micro-undercut position demolding structure of claim 1, wherein: the first notch portion is provided with a first bottom surface and a first side surface, the first bottom surface extends horizontally, and the first side surface is perpendicular to the first bottom surface.
5. The micro-undercut position demolding structure of claim 1, wherein: the second notch portion is provided with a second bottom surface and a second side surface, the second bottom surface extends horizontally, the second side surface extends obliquely, and an acute angle is formed between the second side surface and the second bottom surface.
6. The micro-undercut position demolding structure of claim 1, wherein: the rigidity strength of the insert is greater than that of the spring top.
7. The micro-undercut position demolding structure of claim 1, wherein: the die buckling position demolding structure further comprises an ejection supporting block, the ejection supporting block is installed in the ejection mounting groove, the ejection supporting block and the lower end portion of the ejection are mutually abutted along the horizontal direction, and the lower end portion of the ejection and the ejection supporting block are both abutted against the side wall surface of the ejection mounting groove.
8. The micro-undercut position demolding structure of claim 1, wherein: the supporting piece comprises a first supporting piece and a second supporting piece, the first supporting piece is located on the lower side of the lower die piece and is separated from the lower die piece by a certain distance, the ejection mounting groove is formed in the first supporting piece, and the second supporting piece is located on the lower side of the first supporting piece and is abutted to the first supporting piece.
9. The mold snap-off demolding structure according to claim 1, wherein: the top wall of the insert and the top wall of the spring top are both located in the injection molding space and located on the same horizontal plane.
10. A method for forming an injection molding part by using a micro-inverted buckle position demoulding structure comprises the following steps:
(1) the lower die part is provided with a buckling demolding assembly installing groove extending along the up-down direction, the buckling demolding assembly comprises an insert and a spring top, the insert and the spring top are installed on the buckling demolding assembly installing groove, the insert and the spring top are mutually abutted along the horizontal direction, the insert is provided with a convex part, the inner wall of the buckling demolding assembly installing groove is provided with a concave part corresponding to the convex part, the convex part is matched with the concave part, the upper end part of the insert is provided with a first notch part, the upper end part of the spring top is provided with a second notch part, the first notch part and the second notch part are adjacently arranged and form a hook groove, the insert is provided with a concave groove extending along the up-down direction, the concave groove is provided with an upper wall surface, the spring top is provided with a convex bag protruding towards the insert from the side wall of the spring top, and the convex bag is positioned in the concave groove, the supporting piece is positioned on the lower side of the lower die and is separated from the lower die by a certain distance, the supporting piece is provided with a spring top mounting groove which extends along the vertical direction and penetrates through the upper surface of the supporting piece, and the lower end part of the spring top is mounted in the spring top mounting groove;
(2) the upper die part and the lower die part are assembled to form an injection molding space, the injection molding space is communicated with the hook groove, a plastic solution is injected into the injection molding space to form an injection molding part, the injection molding part comprises an injection molding part body and a hook structure, the injection molding part body is formed in the injection molding space, the hook structure is formed in the hook groove, the hook structure protrudes downwards from the lower wall surface of the injection molding part body, the hook structure comprises a front wall surface, a rear wall surface and a bottom wall surface, an acute angle is formed between the rear wall surface and the lower wall surface of the injection molding part body, the first bottom surface of the first notch part is attached to the partial bottom wall surface of the hook structure, the first side surface of the first notch part is attached to the front wall surface of the hook structure, and the second bottom surface of the second notch part is attached to the partial bottom wall surface of the hook structure, the second side surface of the second notch part is attached to the rear wall surface of the hook structure, and the top wall of the insert and the top wall of the spring top are both attached to the lower wall surface of the injection molding part body;
(3) the upper die part and the lower die part are opened, the elastic top is upwards pushed and propped against the injection molding part body, the hook structure is separated from the first gap part, the convex hull slowly moves upwards in the concave groove until contacting with the upper wall surface of the concave groove, the elastic top is continuously pushed and propped upwards, the convex hull slowly moves along the upper wall surface, and at the moment, the second side surface of the second gap part is not separated from the rear wall surface of the hook structure;
(4) the elastic top is continuously pushed upwards, the rigid strength of the insert is greater than that of the elastic top, so that the convex hull can move out of the concave groove and can continuously and slowly move upwards along the side wall surface of the insert after moving out of the concave groove, the second side surface of the second notch part is slowly separated from the rear wall surface of the hook structure in the process that the convex hull continuously moves upwards along the side wall surface of the insert, at the moment, the lower end part of the elastic top tends to move towards the direction of the insert, and the elastic top supporting block is positioned in the elastic top mounting groove and prevents the lower end part of the elastic top from moving towards the direction of the insert;
(5) and when the rear wall surface of the hook structure is completely separated from the second side surface of the second gap part, the upward pushing of the elastic top is stopped, the convex hull moves downwards into the concave groove, the elastic top resets, and the first gap part and the second gap part form the hook groove again.
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