CN110524804B - Injection mold for secondary demolding of movable mold side rib position - Google Patents
Injection mold for secondary demolding of movable mold side rib position Download PDFInfo
- Publication number
- CN110524804B CN110524804B CN201910764587.6A CN201910764587A CN110524804B CN 110524804 B CN110524804 B CN 110524804B CN 201910764587 A CN201910764587 A CN 201910764587A CN 110524804 B CN110524804 B CN 110524804B
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- core rod
- core
- rod fixing
- fixing sleeve
- mold
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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
-
- 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
- B29C45/4407—Removing or ejecting moulded articles for undercut articles by flexible movement of undercut portions of the articles
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an injection mold for secondary demolding of a side rib position of a movable mold, which comprises a front template (1), a rear template (2), a movable mold core (3), a static mold core (4) and a supporting plate (5), wherein the movable mold core (3) is fixed with the rear template (2), the static mold core (4) is fixed with the front template (1), and the supporting plate (5) is fixed with the rear template (2), and is characterized in that: the novel core rod fixing device further comprises a core rod (6), a core rod fixing sleeve (7), a core rod fixing block (8), a spring (9) and a draw hook (10). The injection mold for secondary demolding of the side rib position of the movable mold adopts two-step mold opening, can ensure normal demolding of the barbs of the inner ring and the outer ring, and has the advantages of simple structure and good reliability.
Description
Technical Field
The invention relates to the technical field of injection molds, in particular to an injection mold for secondary demolding of a side rib position of a movable mold.
Background
As shown in fig. 1, there is a plastic product at present, which includes a body disc 101, an inner ring 102 and an outer ring 103, the inner ring 102 and the outer ring 103 are located at the bottom of the body disc 101, the inner ring 102 is located in the outer ring 103 with a space therebetween, a plurality of notches are provided on a side wall of one circle of the inner ring 102, so that the inner ring is divided into several sections, and barbs 104 are provided on outer sides of the bottoms of the inner ring 102 and the outer ring 103. During injection molding, if the inner ring 102 and the outer ring 103 are demolded in a distributed manner by using conventional sliders, the normal demolding cannot be realized due to the fact that the size is too small and no space for installing the sliders is available.
Disclosure of Invention
The invention aims to solve the technical problem of providing the injection mold for secondary demolding of the side rib position of the movable mold, which adopts two-step mold opening, can ensure normal demolding of the barbs of the inner ring and the outer ring, and has simple structure and good reliability.
The invention provides an injection mold for secondary demolding of a movable mold side rib position, which has the following structure and comprises a front template, a rear template, a movable mold core, a stationary mold core and a supporting plate, wherein the movable mold core is fixed with the rear template, the stationary mold core is fixed with the front template, the supporting plate is fixed with the rear template, the injection mold also comprises a core rod, a core rod fixing sleeve, a core rod fixing block, a spring and a drag hook, the movable mold core and the stationary mold core form a cavity of a body disc of a molded product after being assembled, the core rod is movably connected in a central hole of the core rod fixing sleeve, and a cavity for molding an inner ring and an outer ring and a cavity for molding a barb are arranged between the core rod and the core rod; the bottom of the mandrel extends out of the mandrel fixing sleeve and is fixed with the mandrel fixing block, the mandrel fixing block is fixed inside the supporting plate, the spring is sleeved outside the mandrel, the top end of the spring abuts against a convex block of the mandrel fixing sleeve, the bottom end of the spring abuts against the mandrel fixing block, the drag hooks are in a group, the bottoms of the drag hooks are fixed on the supporting plate, the top ends of the drag hooks are embedded into a bottom hole of the rear template and are positioned outside the mandrel fixing sleeve, the bottom of the mandrel fixing sleeve is provided with the convex block, and the inner diameter of the top of the drag hook is; when the die is closed, the movable die core and the static die core are closed, a cavity of a formed product is formed by the movable die core, the static die core, the top of the core rod and the top of the core rod fixing sleeve, and the tops of the core rod and the core rod fixing sleeve are abutted against the body disc; a space is arranged between the top of the draw hook and the top surface of the convex block; the die sinking comprises a first step and a second step, wherein in the first step of die sinking, the supporting plate moves downwards for a distance a for the first time, the supporting plate drives the core rod to move downwards, and the top of the core rod is far away from the formed inner ring and the outer ring, so that the inner wall of the inner ring forms a cavity; and (3) a second step of die sinking, wherein the supporting plate moves downwards for a distance b for the second time and drives the draw hook to move downwards, the draw hook pulls the convex block of the core rod fixing sleeve downwards, the top of the core rod fixing sleeve is far away from the inner ring after forming and the inner ring after outer ring forming simultaneously contract radially, and finally the demoulding of the front template, the rear template, the movable die core and the static die core is completed.
The top of drag hook is equipped with two stoppers of inwards bending, and two stopper symmetries are located the fixed cover of plug outside, and the distance between two stoppers is greater than the external diameter of the fixed cover body of plug and is less than the external diameter of lug, the drag hook drives the lug downwards in step by two stoppers.
The top of the inner wall of the core rod fixing sleeve is provided with a notch for forming an inner ring barb, and the outer diameter of the top of the core rod fixing sleeve is smaller and forms a cavity for forming an outer ring with the movable mold core during mold closing.
And in the first step of die opening, the top end of the mandrel fixing sleeve is lower than the bottom of the inner ring.
The upper part of the core rod fixing sleeve is in clearance fit with the inner holes of the rear template and the movable die core.
After adopting the structure, the invention has the following advantages: two-step mold opening is adopted, in the first step of mold opening, the supporting plate moves downwards for a distance a for the first time, the supporting plate drives the core rod to move downwards, the top of the core rod is far away from the formed inner ring and the outer ring, and the inner wall of the inner ring forms a cavity; the die sinking second step, the layer board is the downstream distance b and drives the drag hook down for the second time, the lug of the fixed cover of drag hook down pulling plug, the inner circle after the shaping and the radial shrink of inner circle after the outer lane simultaneous molding are kept away from at the top of the fixed cover of plug, and the drawing of patterns is accomplished to preceding template, back template, movable mould benevolence, quiet mould benevolence at last, adopts the mould of this kind of structure, need not the sliding construction drawing of patterns, can guarantee the barb normal drawing of patterns, simple structure, the good reliability of inner circle and outer lane between narrow and small inner circle in space and outer lane.
Drawings
Fig. 1 is a schematic view of the structure of a molded product of the present invention.
FIG. 2 is a schematic view of a mold clamping structure of the present invention.
FIG. 3 is a schematic view of a first step of opening the mold according to the present invention.
FIG. 4 is a schematic diagram of a second step of opening the mold according to the present invention.
Fig. 5 is a schematic view of the mold opening structure of the present invention.
Fig. 6 is a schematic view of a connection structure of the core rod and the limiting block of the present invention.
Fig. 7 is a schematic structural view of the mandrel fixing sleeve of the present invention.
The drawing shows that the core rod fixing device comprises a front template 1, a rear template 2, a movable mold core 3, a fixed mold core 4, a fixed mold core 5, a supporting plate 6, a core rod 7, a core rod fixing sleeve 7.1, a bump 7.2, a notch 8, a core rod fixing block 9, a spring 10, a draw hook 10.1 and a limiting block.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1-7, the injection mold for secondary demolding at the side rib position of the movable mold comprises a front mold plate 1, a rear mold plate 2, a movable mold core 3, a stationary mold core 4 and a supporting plate 5, wherein the movable mold core 3 is fixed with the rear mold plate 2, the stationary mold core 4 is fixed with the front mold plate 1, and the supporting plate 5 is fixed with the rear mold plate 2, and is characterized in that: the core rod fixing device further comprises a core rod 6, a core rod fixing sleeve 7, a core rod fixing block 8, a spring 9 and a draw hook 10, wherein a cavity of a body disc 101 of a formed product is formed after the movable die core 3 and the static die core 4 are assembled.
The core rod 6 is movably connected in a central hole of the core rod fixing sleeve 7, and cavities for forming the inner ring 102 and the outer ring 103 and a concave cavity for forming the barb 104 are arranged between the core rod 6 and the core rod fixing sleeve 7; the bottom of the core rod 6 extends out of the core rod fixing sleeve 7 and is fixed with the core rod fixing block 8, the core rod fixing block 8 is fixed inside the supporting plate 5, the spring 9 is sleeved outside the core rod 6, the top end of the spring abuts against the convex block 7.1 of the core rod fixing sleeve 7, and the bottom end of the spring abuts against the core rod fixing block 8.
The drag hook 10 is a group, the bottom of the drag hook is fixed on the supporting plate 5, the top end of the drag hook is embedded in the bottom hole of the rear template 2 and is positioned outside the core rod fixing sleeve 7, the bottom of the core rod fixing sleeve 7 is provided with a convex block 7.1, and the inner diameter of the top of the drag hook 10 is larger than the outer diameter of the core rod fixing sleeve 7 body and smaller than the outer diameter of the convex block 7.1.
The top of the inner wall of the core rod fixing sleeve 7 is provided with a notch 7.2 for forming an barb of the inner ring 102, and the outer diameter of the top of the core rod fixing sleeve 7 is smaller, so that a cavity for forming the outer ring 103 is formed with the movable die core 3 during die assembly.
And in the first step of opening the mold, the top end of the mandrel fixing sleeve 7 is lower than the bottom of the inner ring 102.
The upper part of the core rod fixing sleeve 7 is in clearance fit with the inner holes of the rear template 2 and the movable die core 3, so that the rear template 2 and the movable die core 3 can be in sliding connection with the core rod fixing sleeve 7.
When the die is closed, the movable die core 3 and the static die core 4 are closed, the movable die core 3, the static die core 4, the top of the core rod 6 and the top of the core rod fixing sleeve 7 form a cavity of a formed product, and the tops of the core rod 6 and the core rod fixing sleeve 7 are abutted against the body disc 101; a space is arranged between the top of the draw hook 10 and the top surface of the convex block 7.1.
The mold opening comprises a first step and a second step, wherein in the first step of mold opening, the supporting plate 5 moves downwards for a distance a for the first time, the supporting plate 5 drives the core rod 6 to move downwards, and the top of the core rod 6 is far away from the formed inner ring 102 and the outer ring 103, so that the inner wall of the inner ring 102 forms a cavity; and (3) a second step of die sinking, wherein the supporting plate 5 moves downwards for a distance b for the second time and drives the draw hook 10 to move downwards, the draw hook 10 pulls the bump 7.1 of the core rod fixing sleeve 7 downwards, the top of the core rod fixing sleeve 7 is far away from the inner ring 102 formed after the inner ring 102 and the outer ring 103 are formed simultaneously, and the inner ring 102 is radially contracted, and finally the front die plate 1, the rear die plate 2, the movable die core 3 and the static die core 4 complete the die sinking.
The top of drag hook 10 is equipped with two stoppers 10.1 of inwards bending, and two stoppers 10.1 symmetric positions are outside the fixed cover 7 of plug, and the distance between two stoppers 10.1 is greater than the external diameter of the fixed cover 7 body of plug and is less than the external diameter of lug 7.1, two stoppers 10.1 drive lug 7.1 are synchronous downwards down downwards for drag hook 10.
Claims (5)
1. The utility model provides an injection mold of movable mould side muscle position secondary drawing of patterns, includes front template (1), back template (2), movable mould benevolence (3), quiet mould benevolence (4) and layer board (5), movable mould benevolence (3) are fixed with back template (2), quiet mould benevolence (4) are fixed with front template (1), layer board (5) are fixed with back template (2), its characterized in that: the core rod forming device is characterized by further comprising a core rod (6), a core rod fixing sleeve (7), a core rod fixing block (8), a spring (9) and a draw hook (10), wherein a cavity of a body disc (101) of a formed product is formed after the movable mold core (3) and the static mold core (4) are assembled, the core rod (6) is movably connected in a central hole of the core rod fixing sleeve (7), and a cavity for forming an inner ring (102) and an outer ring (103) and a concave cavity for forming an barb (104) are arranged between the core rod (6) and the core rod fixing sleeve (7); the bottom of the core rod (6) extends out of the core rod fixing sleeve (7) and is fixed with the core rod fixing block (8), the core rod fixing block (8) is fixed inside the supporting plate (5), the spring (9) is sleeved outside the core rod (6), the top end of the spring abuts against a convex block (7.1) of the core rod fixing sleeve (7), the bottom end of the spring abuts against the core rod fixing block (8), the drag hooks (10) are in a group, the bottoms of the drag hooks are fixed on the supporting plate (5), the top end of the drag hook is embedded into a bottom hole of the rear template (2) and is positioned outside the core rod fixing sleeve (7), the bottom of the core rod fixing sleeve (7) is provided with a convex block (7.1), and the inner diameter of the top of the drag hook (10) is larger than the outer diameter of; when the die is closed, the movable die core (3) and the static die core (4) are closed, a cavity for forming a product is formed by the movable die core (3), the static die core (4), the top of the core rod (6) and the top of the core rod fixing sleeve (7), and the tops of the core rod (6) and the core rod fixing sleeve (7) are abutted against the body disc (101); a space is arranged between the top of the draw hook (10) and the top surface of the convex block (7.1); the mold opening comprises a first step and a second step, wherein in the first step of mold opening, the supporting plate (5) moves downwards for a distance a for the first time, the supporting plate (5) drives the core rod (6) to move downwards, and the top of the core rod (6) is far away from the formed inner ring (102) and the outer ring (103), so that the inner wall of the inner ring (102) forms a cavity; the mould opening second step, layer board (5) second time moves down distance b and drives drag hook (10) down, drag hook (10) are down spur lug (7.1) of the fixed cover of plug (7), inner circle (102) after the shaping and outer lane (103) are kept away from at the top of the fixed cover of plug (7) and inner circle (102) after the shaping are radial shrink simultaneously, and the drawing of patterns is accomplished in preceding template (1), back template (2), movable mould benevolence (3), quiet mould benevolence (4) at last.
2. The injection mold for secondary demolding of the movable mold side rib position as claimed in claim 1, wherein: the top of drag hook (10) is equipped with two stopper (10.1) of inwards bending, and two stopper (10.1) symmetric positions are outside the fixed cover of plug (7), and the distance between two stopper (10.1) is greater than the external diameter of the fixed cover of plug (7) body and is less than the external diameter of lug (7.1), drag hook (10) two stopper (10.1) down drive lug (7.1) are synchronous downwards.
3. The injection mold for secondary demolding of the movable mold side rib position as claimed in claim 1, wherein: the top of the inner wall of the core rod fixing sleeve (7) is provided with a notch (7.2) for forming an barb of the inner ring (102), and the outer diameter of the top of the core rod fixing sleeve (7) is smaller and forms a cavity for forming the outer ring (103) with the movable die core (3) during die assembly.
4. The injection mold for secondary demolding of the movable mold side rib position as claimed in claim 1, wherein: in the first step of opening the mold, the top end of the mandrel fixing sleeve (7) is lower than the bottom of the inner ring (102).
5. The injection mold for secondary demolding of the movable mold side rib position as claimed in claim 1, wherein: the upper part of the core rod fixing sleeve (7) is in clearance fit with the inner holes of the rear template (2) and the movable mould core (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910764587.6A CN110524804B (en) | 2019-08-19 | 2019-08-19 | Injection mold for secondary demolding of movable mold side rib position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910764587.6A CN110524804B (en) | 2019-08-19 | 2019-08-19 | Injection mold for secondary demolding of movable mold side rib position |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110524804A CN110524804A (en) | 2019-12-03 |
| CN110524804B true CN110524804B (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910764587.6A Active CN110524804B (en) | 2019-08-19 | 2019-08-19 | Injection mold for secondary demolding of movable mold side rib position |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3540354C2 (en) * | 1984-11-15 | 1989-09-14 | Karl 7298 Lossburg De Hehl | |
| CN2626710Y (en) * | 2003-06-20 | 2004-07-21 | 顺德市顺达电脑厂有限公司 | Enforced stripping structure |
| CN101885227A (en) * | 2010-07-27 | 2010-11-17 | 冠捷显示科技（厦门）有限公司 | A kind of demoulding device for barb injection molded part |
| CN103496059A (en) * | 2013-09-23 | 2014-01-08 | 凡嘉科技（无锡）有限公司 | Forced demolding structure for outwards convex inverted products |
| CN103507187A (en) * | 2013-10-12 | 2014-01-15 | 凡嘉科技（无锡）有限公司 | Structure used for forcibly demoulding inverted buckle at lower part of finished product and provided with floating insert |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6772484B2 (en) * | 2000-09-28 | 2004-08-10 | Toyoda Gosei Co., Ltd | Mounting structure for mounting a resin molded article to a body panel |
-
2019
- 2019-08-19 CN CN201910764587.6A patent/CN110524804B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3540354C2 (en) * | 1984-11-15 | 1989-09-14 | Karl 7298 Lossburg De Hehl | |
| CN2626710Y (en) * | 2003-06-20 | 2004-07-21 | 顺德市顺达电脑厂有限公司 | Enforced stripping structure |
| CN101885227A (en) * | 2010-07-27 | 2010-11-17 | 冠捷显示科技（厦门）有限公司 | A kind of demoulding device for barb injection molded part |
| CN103496059A (en) * | 2013-09-23 | 2014-01-08 | 凡嘉科技（无锡）有限公司 | Forced demolding structure for outwards convex inverted products |
| CN103507187A (en) * | 2013-10-12 | 2014-01-15 | 凡嘉科技（无锡）有限公司 | Structure used for forcibly demoulding inverted buckle at lower part of finished product and provided with floating insert |
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| Publication number | Publication date |
|---|---|
| CN110524804A (en) | 2019-12-03 |
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