CN115302723A - Injection mold capable of preventing sliding block from colliding with ejector pin and injection molding method thereof - Google Patents
Injection mold capable of preventing sliding block from colliding with ejector pin and injection molding method thereof Download PDFInfo
- Publication number
- CN115302723A CN115302723A CN202210912851.8A CN202210912851A CN115302723A CN 115302723 A CN115302723 A CN 115302723A CN 202210912851 A CN202210912851 A CN 202210912851A CN 115302723 A CN115302723 A CN 115302723A
- Authority
- CN
- China
- Prior art keywords
- mold
- injection molding
- guide post
- inclined guide
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 104
- 238000002347 injection Methods 0.000 title claims abstract description 91
- 239000007924 injection Substances 0.000 title claims abstract description 91
- 230000007246 mechanism Effects 0.000 claims abstract description 122
- 238000003780 insertion Methods 0.000 claims abstract description 39
- 230000037431 insertion Effects 0.000 claims abstract description 39
- 230000003116 impacting effect Effects 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims description 20
- 230000009471 action Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 239000011324 bead Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Images
Classifications
-
- 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
Abstract
The application discloses an injection mold for preventing a sliding block from hitting an ejector pin and an injection molding method thereof, and relates to the technical field of injection molds, wherein the injection mold further comprises an anti-collision ejector pin rod, the bottom end of the anti-collision ejector pin rod vertically penetrates through a rear mold and is connected to a bottom plate part of an ejection mechanism, and the anti-collision ejector pin rod and the ejection mechanism synchronously eject or retreat; a sliding block body of the sliding block mechanism is vertically provided with a movable insertion hole; when a front mold and a rear mold of the injection mold are opened, the slider body is far away from the front mold along with the rear mold, the slider body slides for a set distance in the direction far away from an injection molding piece, and after sliding, the movable insertion hole is coaxially aligned with the anti-collision ejector pin rod; when the injection mold is closed and the ejection mechanism is not retracted in place, the anti-collision ejector pin rod is positioned in the movable insertion hole to limit the slide block body to be close to an ejector pin impacting the ejection mechanism. The injection mold and the injection molding method thereof not only prevent the injection molding part from being adhered to a front mold, but also prevent the sliding block from colliding with the thimble.
Description
Technical Field
The application relates to the technical field of injection molds, in particular to an injection mold capable of preventing a sliding block from colliding with an ejector pin and an injection molding method thereof.
Background
At present, the injection molding part with the back-off is influenced by the structure, appearance requirements and production stability, a sliding block structure is required to be designed to realize the molding of the injection molding part, the injection molding part is prevented from being adhered to a front mold, and the injection molding part and a rear mold are guaranteed to be demoulded together. The sliding block structure is used for pressing a specific part of the injection molding part. Meanwhile, an ejection mechanism must be designed at the position close to the product characteristic at the bottom of the sliding block, and the ejection mechanism is used for ejecting and separating the injection molding piece from the rear mold. The key point is that the sliding block structure and the ejection mechanism are both aimed at specific parts of an injection molding piece, so that the situation that the sliding block mechanism and the ejection mechanism collide with each other to cause damage to the mold can occur when the mold is closed and if the ejection mechanism does not retreat in place.
As shown in fig. 1 and 2, a certain injection molded part is characterized as follows: the injection molding piece is a high-requirement appearance piece, and the appearance surface does not allow any defect influencing vision. The mold opening direction is the Z direction, PL (Parting line) is a Parting line of an injection molded part, a Parting line upper region 1b is formed in the front mold cavity, and a Parting line lower region 1c is formed in the rear mold cavity. Because most injection molding characteristic shaping leads to the product can glue on preceding mould cavity after the shaping at preceding mould cavity for the ejection mechanism who sets up at the back mould can't realize that the ejecting automatic part of getting of back mould. In order to ensure that the injection molding part and the rear mold are together designed in the rear mold during demolding, the slider mechanism is used for pressing the back-off part 1a of the injection molding part, so that the injection molding part is left on the rear mold during mold opening, and the subsequent rear mold can be automatically ejected out to take the injection molding part conveniently. But due to the characteristics of the injection molding piece, the slider mechanism presses the inverted part 1a of the injection molding piece from the upper part, and the ejection mechanism is supported against the inverted part 1a from the lower part; therefore, important attention should be paid to the design of the mold, and if the ejection mechanism does not retract in place, how to avoid the damage to the ejection mechanism caused by collision between the slide block mechanism and the ejection mechanism when the mold is closed.
In the related art, in order to solve the technical problems that the ejection mechanism is not retracted in place and the slider mechanism and the ejection mechanism are easy to collide with each other, a strong reset mechanism 4 is additionally arranged by a person skilled in the art. Specifically, as shown in fig. 3 to 8, the injection molded part 1 is injection molded between the front mold 5 and the rear mold 7, the slider mechanism 2 presses the undercut portion 1a of the injection molded part 1 from above, the ejector rod of the ejector mechanism 3 passes through the rear mold 7 and abuts against the undercut portion 1a and other portions of the injection molded part 1, and the bottom plate portion of the ejector mechanism 3 can move up and down. The strong reset mechanism 4 includes a first reset rod 41, a striking block 44, a swing rod 45, a torsion spring rotating shaft 46 and two guide blocks (a first guide block 42 and a second guide block 43), wherein the first reset rod 41 is vertically arranged, the top end of the first reset rod is fixed on the side wall of the front mold 5, and the bottom end of the first reset rod is semicircular. Two guide blocks are fixed to the rear mold 7 and the mold leg 9, respectively, and the two guide blocks are used for guiding the first restoring rod 41 to vertically move therebetween. The striking block 44 is fixed to the bottom plate portion of the ejector mechanism 3 through the side surface of the die leg 9, and the striking block 44 and the bottom plate portion of the ejector mechanism 3 move up and down in synchronization. The fixed end of the swing rod 45 is fixed on the rear die 7 through a torsion spring rotating shaft 46, and the movable end of the swing rod 45 is semicircular. When the first restoring rod 41 is vertically inserted to the bottom, the movable end of the swing link 45 contacts with the top surface of the striking block 44 and the side surface of the first restoring rod 41.
When the mold is opened, the rear mold 7, the slider mechanism 2, the ejection mechanism 3 and the injection molding part 1 start to retreat together, and when the mold retreats to a certain distance, the reset rod 41 is separated from the two guide blocks. Then, the bottom plate part of the ejection mechanism 3 moves upwards to drive the ejector rod of the ejection mechanism 3 to eject the injection molding 1. When the mold is closed, if the previous ejection mechanism 3 is not completely retracted to the right position; the first reset rod 41 in the strong reset mechanism 4 contacts with the swing rod 45, and while the rear mold part of the mold continues to advance, the first reset rod 41 in the strong reset mechanism contacts with the swing rod 45 first, the fixed end of the swing rod 45 presses the collision block 44 downwards, the collision block 44 drives the bottom plate part of the ejection mechanism 3 to descend, and then the ejection mechanism 3 returns to the final position.
Although the technical problem that the sliding block mechanism and the ejection mechanism collide with each other during mold closing can be solved by the technical scheme, the following problems still exist:
(1) the strong resetting mechanism has complex structure and large weight, increases the burden of the bottom mold feet 9, needs to increase the number of the mold feet or improve the compression resistance of the mold feet, and increases the cost. As shown in fig. 7, after the strong resetting mechanisms are added, the balance performance of the whole structure of the rear mold needs to be considered, if two sets of strong resetting mechanisms are designed on one diagonal of the side wall of the rear mold, the other diagonal is light in weight and poor in balance performance; if four sets of strong reset mechanisms are added, the balance performance can be met, but the weight burden is further increased, and the cost is improved.
(2) The strong reset mechanism occupies the space of the side wall of the die, and the die is easy to interfere with the design positions of the peripheral hanging rings during design.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide the injection mold for preventing the sliding block from colliding with the thimble and the injection molding method thereof, so that the injection molding part is prevented from being adhered to a front mold, and the sliding block is prevented from colliding with the thimble.
In order to achieve the above purposes, the technical scheme is as follows: an injection mold for preventing a slide block from colliding with an ejector pin comprises a slide block mechanism and an ejection mechanism, and further comprises an anti-collision ejector pin rod, wherein the bottom end of the anti-collision ejector pin rod vertically penetrates through a rear mold and is connected to a bottom plate part of the ejection mechanism, and the anti-collision ejector pin rod and the ejection mechanism synchronously eject or retreat; a sliding block body of the sliding block mechanism is vertically provided with a movable insertion hole;
when a front mold and a rear mold of the injection mold are opened, the slider body is far away from the front mold along with the rear mold, the slider body slides for a set distance in the direction far away from an injection molding piece, and after the slider body slides, the movable insertion hole is coaxially aligned with the anti-collision ejector pin rod; when the injection mold is closed and the ejection mechanism is not in place, the anti-collision ejector pin rod is located in the movable insertion hole to limit the sliding block body to approach an ejector pin impacting the ejection mechanism.
On the basis of the technical scheme, the injection mold further comprises mold feet, the mold feet are arranged on the lower layer of the rear mold, and the mold feet comprise movable cavities; the ejection mechanism comprises an upper ejector plate, a lower ejector plate and a plurality of ejector rods, the ejector rods and the anti-collision ejector rod sequentially penetrate through the upper ejector plate and the rear die from bottom to top, and the top ends of part of the ejector rods are located below the back-off; the upper ejector plate and the lower ejector plate slide up and down in the movable cavity.
On the basis of the technical scheme, the injection mold further comprises a lower fixing plate, the lower fixing plate is laid on the lower layer of the mold foot, and the lower fixing plate and the movable cavity are enclosed to form an upper sealing cavity and a lower sealing cavity.
On the basis of the technical scheme, the injection mold further comprises two pressing strips, the two pressing strips are fixed on the rear mold, and the sliding block body can be clamped between the two pressing strips in a sliding mode; the slider body keeps away from one side slope of injection molding and sets up and lead smooth antifriction plate, the front mould sets up the enhancement drive face corresponding to leading smooth antifriction plate department.
On the basis of the technical scheme, the sliding block mechanism further comprises a resistant template and a limiting block, wherein the resistant template is laid on the bottom surface of the sliding block body; and the limiting block is fixed on the top surface of the rear mold and used for limiting the injection molding part to slide out of the two pressing strips.
On the basis of the technical scheme, the sliding block mechanism further comprises an inclined guide post, and an inclined guide post hole is formed in the sliding block body; the top end of the inclined guide post is relatively fixed on the front die, and the bottom end of the inclined guide post is inserted into the inclined guide post hole; when the injection mold is opened, the slider body slides towards the direction far away from the injection molding part under the action of the inclined guide pillar and the inclined guide pillar hole, and after the slider body slides, the movable insertion hole is coaxially aligned to the anti-collision ejector pin rod.
On the basis of the technical scheme, the cross section of the inclined guide post hole is U-shaped, after die assembly is carried out, the inclined guide post is tightly attached to the inner wall of the inclined guide post hole close to the injection molding part, and a certain gap is formed between the inclined guide post and the inner wall of the inclined guide post hole far away from the injection molding part.
On the basis of the technical scheme, a 1mm gap is formed between the top surface of the anti-collision ejector pin rod and the bottom surface of the sliding block body, and the diameter of the movable insertion hole is 1mm larger than that of the anti-collision ejector pin rod.
The application discloses injection molding method of injection mold based on above-mentioned slider that prevents hits thimble includes following step:
the injection mold is closed, if the ejection mechanism does not return in place, the anti-collision ejector pin rod is positioned in the movable insertion hole, and the anti-collision ejector pin rod limits the slide block body to be close to an ejector pin impacting the ejection mechanism; adjusting the ejection mechanism to retreat in place, enabling the sliding block body to be close to an ejector pin of the ejection mechanism, and enabling the front die, the rear die and the sliding block body to form an injection molding cavity;
injection molding of the injection molding cavity, and molding of an injection molding piece;
opening the injection mold, wherein the injection molding piece is tightly pressed on a rear mold by the slide block body, the rear mold is far away from the front mold, and the slide block body slides for a set distance in the direction far away from the injection molding piece; the movable insertion hole is coaxially aligned with the anti-collision thimble rod;
the thimble of anticollision thimble rod and ejection mechanism makes progress in step, and the injection molding separates with the back mould, and anticollision thimble rod is worn out from the activity patchhole.
On the basis of the technical scheme, the sliding block mechanism further comprises an inclined guide post, and an inclined guide post hole is formed in the sliding block body; the top end of the inclined guide post is relatively fixed on the front die, and the bottom end of the inclined guide post is inserted into the inclined guide post hole; the cross section of the inclined guide post hole is U-shaped, after die assembly, the inclined guide post is tightly attached to the inner wall of the inclined guide post hole close to the injection molding piece, and a certain gap is formed between the inclined guide post and the inner wall of the inclined guide post hole far away from the injection molding piece; and (3) opening the injection mold, and sliding the slider body in the direction far away from the injection molding part under the action of the inclined guide pillar and the inclined guide pillar hole.
The beneficial effect that technical scheme that this application provided brought includes:
the injection mold is mainly provided with an anti-collision ejector pin rod in a new structure, correspondingly, the slide block body is vertically provided with a movable insertion hole, the bottom end of the anti-collision ejector pin rod vertically penetrates through the rear mold and is connected to the bottom of the ejection mechanism, and the anti-collision ejector pin rod and the ejection mechanism synchronously eject or retreat; the anti-collision thimble rod is used for preventing the slide block body from colliding with the thimble of the ejection mechanism. When the front mould and the back mould are opened, the front mould is kept away from along with the back mould to slider body and injection molding, and the slider body slides to the direction of keeping away from the injection molding and sets for the distance, and after sliding, the activity patchhole aligns with the anticollision thimble rod is coaxial. When the injection molding part is ejected, the ejector pin of the ejection mechanism ejects the injection molding part upwards, and the anti-collision ejector pin rod penetrates out of the movable insertion hole.
When the front mold and the rear mold are closed, if the ejection mechanism does not return in place, the anti-collision ejector pin rod is located in the movable insertion hole, the sliding block body is limited to be close to an ejector pin impacting the ejection mechanism, and the front mold and the rear mold cannot be closed normally. When the ejection mechanism retreats in place, the anti-collision ejector pin rod is separated from the movable insertion hole, and the front die and the rear die can be normally closed. The injection mold is simple in structure and light in weight, and not only can an injection molding piece be prevented from being adhered to a front mold, but also a sliding block body can be prevented from impacting a thimble of an ejection mechanism; compared with a strong reset mechanism in the prior art, the injection mold is simple in structure, the anti-collision ejector pin rod is mainly added, the movable insertion hole is formed in the slider body, the overall weight is light, the weight burden is greatly reduced, and the balance performance of the integral injection mold is not influenced; simultaneously, the anticollision thimble bar of this application need not occupy the lateral wall space of mould.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of an injection molded part provided by an embodiment of the present application;
FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;
FIG. 3 is a top view of a conventional injection mold with the front mold removed;
FIG. 4 is a side view of a conventional injection mold;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;
FIG. 6 is a cross-sectional view of C-C of FIG. 3;
FIG. 7 is a perspective view of a conventional injection mold with the front mold removed;
FIG. 8 is a schematic view of a strong reset mechanism of a conventional injection mold;
FIG. 9 is a schematic view of an injection mold provided in an embodiment of the present application with the front mold removed;
FIG. 10 is an enlarged view of a portion D of FIG. 9;
FIG. 11 is a schematic structural diagram of a bead and a slider body according to an embodiment of the present disclosure;
FIG. 12 is a schematic structural view of an injection molded part, a crash pin and an ejection mechanism provided in accordance with an embodiment of the present application;
FIG. 13 is a schematic view of an injection molded part being ejected by the anti-collision ejector rod and the ejection mechanism according to an embodiment of the present application;
reference numerals: 1a, a back-off part; 1b, parting line upper region; 1c, a lower region of the parting line; 1. an injection molding piece; 2. a slider mechanism; 3. an ejection mechanism; 4. a strong reset mechanism; 5. a front mold; 51. reinforcing the driving surface; 6. a front mold core; 7. a rear mold; 71. layering; 8. a rear mold core; 9. a mould leg; 10. an upper ejector plate; 11. a lower ejector plate; 12. a lower fixing plate; 21. a slider body; 211. an oblique guide post hole; 22. an inclined guide post; 23. a template is resistant; 24. a sliding and wear-resisting plate; 25. a limiting block; 26. a fixed block; 41. firstly, resetting a rod; 42. a first guide block; 43. a second guide block; 44. bumping the block; 45. a swing rod; 46. a torsion spring shaft; 31. an anti-collision thimble rod; 212. a movable insertion hole; 91. a movable cavity; 32. a push rod assembly; 320. a top block; 321. a top rod; 322. and (6) supporting the block.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 9 to 13, the present application discloses an embodiment of an injection mold for preventing a slide from hitting a thimble, the injection mold mainly comprises a front mold 5, a rear mold 7, a slide mechanism 2 and an ejection mechanism 3. The injection mold further comprises an anti-collision thimble rod 31, the bottom end of the anti-collision thimble rod 31 vertically penetrates through the rear mold 7 to be connected to the bottom plate part of the ejection mechanism 3, and the anti-collision thimble rod 31 synchronously ejects or retreats with the ejection mechanism 3. The ejection mechanism 3 is used for ejecting the molded injection molding part 1, and the anti-collision ejector pin rod 31 is used for preventing the slide block body 21 from colliding with an ejector pin of the ejection mechanism 3. The slider body 21 of the slider mechanism 2 is vertically provided with a movable insertion hole 212, and the movable insertion hole 212 is used for matching with the anti-collision thimble rod 31.
When the front mold 5 and the rear mold 7 of the injection mold are opened, the slider body 21 tightly presses the back-off of the injection molding part 1 on the rear mold 7, the slider body 21 is far away from the front mold 5 along with the rear mold 7, the slider body 21 slides for a set distance in the direction far away from the injection molding part 1, and after the sliding, the movable insertion hole 212 is coaxially aligned with the anti-collision ejector pin rod 31.
When the injection molding 1 is ejected, the ejector pin of the ejection mechanism 3 ejects the injection molding 1 upward, and the anti-collision ejector pin rod 31 penetrates out of the movable insertion hole 212. When the injection mold is closed and the ejection mechanism 3 is not retracted in place, the anti-collision ejector pin rod 31 is located in the movable insertion hole 212, the slider body 21 is limited from approaching an ejector pin impacting the ejection mechanism 3, and the front mold 5 and the rear mold 7 cannot be closed normally. When the ejector mechanism 3 is retracted to the proper position, the plunger 31 is separated from the movable insertion hole 212, and the front mold 5 and the rear mold 7 can be closed normally.
The injection mold is simpler in structure and light in weight, and not only can an injection molding piece be prevented from being adhered to a front mold, but also a sliding block can be prevented from colliding with an ejector pin; compared with a strong resetting mechanism 4 in the traditional technology, the injection mold is simple in structure, the anti-collision ejector pin rod 31 is mainly added, the movable insertion hole 212 is formed in the slider body 21, the overall weight is light, the weight burden is greatly reduced, and the balance performance of the integral injection mold is not influenced; simultaneously, the anticollision thimble rod 31 of this application need not occupy the lateral wall space of mould.
As shown in fig. 9, in one embodiment, the injection mold further comprises a mold leg 9, the mold leg 9 is disposed at the lower layer of the rear mold 7, and the mold leg 9 comprises a movable cavity 91. The movable cavity 91 is located in the center of the mold foot 9, and the bottom plate portion of the ejector mechanism 3 moves up and down in the movable cavity 91.
The ejection mechanism 3 comprises an upper ejector plate 10, a lower ejector plate 11 and a plurality of ejector rods, the ejector rods and the anti-collision ejector rod 31 sequentially penetrate through the upper ejector plate 10 and the rear mold 7 from bottom to top, and the bottom ends of the ejector rods and the bottom ends of the anti-collision ejector rod 31 are abutted against the lower ejector plate 11. The top of part ejector pin is located the back-off below, and other ejector pins are located the other positions of injection molding. The upper ejector plate 10 and the lower ejector plate 11 slide up and down in the movable cavity 91 to drive the ejector rods and the anti-collision ejector rod 31 to synchronously move up and down.
As shown in fig. 11, the injection mold of the present application further includes a front mold core and a rear mold core 8, the front mold core is located at the bottom center of the front mold 5, and the rear mold core 8 is located at the top center of the rear mold 7. The front mold core and the rear mold core 8 sandwich an injection molding cavity corresponding to the shape of the injection molding. The crash pin 31 vertically penetrates the rear mold 7 and the rear mold core 8.
In one embodiment, the injection mold further comprises a lower fixing plate 12, the lower fixing plate 12 is laid on the lower layer of the mold leg 9, the lower fixing plate 12 and the movable cavity 91 enclose to form an upper and lower sealed cavity, and two sides of the upper and lower sealed cavity are open. The lower fixing plate 12 of the application not only can form a sealed cavity with the movable cavity 91, but also is convenient for the injection mold to be fixedly connected with an external structure.
As shown in fig. 10 and 11, in one embodiment, the injection mold further includes two pressing bars 71, the two pressing bars 71 are fixed to the rear mold 7, the two pressing bars 71 form a slide way, and the slider body 21 slides on the slide way. The slider body 21 is slidably held between the two beads 71. A sliding guide wear plate 24 is obliquely arranged on one side of the slider body 21 away from the injection molding piece 1, and a reinforced driving surface 51 is arranged on the front die 5 corresponding to the sliding guide wear plate 24. The reinforced driving surface 51 of the front mold 5 provides guidance for the slide guiding wear plate 24 of the slide body 21 to facilitate the mutual clamping of the front mold 5 and the rear mold 7.
In one embodiment, the slider mechanism 2 further includes a durable plate 23 and a stopper 25, and the durable plate 23 is laid on the bottom surface of the slider body 21. The sliding block body 21 slides between the two pressing strips, the bottom surface of the sliding block body 21 slides on the upper surface of the template resistant plate 23 in a friction mode, and the template resistant plate 23 can reduce abrasion loss caused by sliding friction.
The limiting block 25 is fixed on the top surface of the rear mold 7 and used for limiting the injection molding part 1 to slide out of the two pressing strips 71. When the front mold 5 and the rear mold 7 are opened, the slider body 21 slides for a set distance in the direction away from the injection molding part 1, and the slider body 21 just contacts the limiting block 25 at the moment.
As shown in fig. 10, in one embodiment, the slider mechanism 2 further includes an inclined guide post 22, and an inclined guide post hole 211 is provided inside the slider body 21; the top end of the angle beam 22 is fixed to the front mold 5, and the bottom end thereof is inserted into the angle beam hole 211. Specifically, the top end of the angle guide post 22 is fixed to the fixing block 26, and the fixing block 26 is fixed to the front mold 5. When the injection mold is opened, the slider body 21 slides in a direction away from the injection molding part 1 under the guiding action of the inclined guide post 22 and the inclined guide post hole 211, and after the slider body slides, the movable insertion hole 212 is coaxially aligned with the anti-collision ejector pin rod 31, so that the injection molding part 1 can be conveniently ejected subsequently.
As shown in fig. 10 and fig. 11, in one embodiment, the cross section of the angled guide post hole 211 is U-shaped, after the mold is closed, the angled guide post 22 is tightly attached to the inner wall of the angled guide post hole 211 close to the injection molded part 1, and a certain gap is provided between the angled guide post 22 and the inner wall of the angled guide post hole 211 far from the injection molded part 1. The utility model provides an injection mold, the U-shaped shape design benefit of oblique guide pillar hole 211, the oblique guide pillar hole 211 of U-shaped makes at the initial one section time of die sinking, and slider body 21 is motionless for back mould 7, has one section distance after between back mould 7 and front mould 5, and slider body 21 just slides for back mould 7. The U-shaped shape of the inclined guide post hole 211 reduces the die opening resistance in a phase-changing manner (in the prior art, the circular inclined guide post hole 211 can slide and abut against the front die 5 in the initial die opening stage of the slider body 21), so that the die opening is facilitated.
In one embodiment, the top surface of the plunger 31 and the bottom surface of the slider body 21 have a 1mm gap therebetween to prevent the two from wearing each other. The diameter of the movable insertion hole 212 is 1mm larger than that of the anti-collision thimble rod 31, so that the anti-collision thimble rod 31 can slide up and down along the movable insertion hole 212.
As shown in fig. 12, the ejection mechanism 3 of the injection mold is a strip shape and includes a plurality of ejector pins; the injection mold further comprises a plurality of anti-collision ejector pins 31, and the anti-collision ejector pins 31 and the ejector pins synchronously eject or retreat. The ejection mechanism 3 hi comprises a push rod assembly 32, the push rod assembly 32 is used for pushing the parts of the injection molding piece 1 except the back-off part 1a, the push rod assembly 32 sequentially comprises a supporting block 322, a push rod 321 and an ejector block 320 from bottom to top, the ejector block 320 is arranged at the top end of the push rod 321, and the ejector block 320 is used for abutting and contacting the injection molding piece 1; the supporting block 322 is installed at the bottom end of the ejector rod 321, and the supporting block 322 is used for enabling the ejector rod 321 to be supported between the upper ejector plate 10 and the lower ejector plate 11 more stably. The application discloses injection mold, newly-increased structure anticollision thimble rod 31, whole basic bilateral symmetry does not influence the holistic balance property of original structure, and balance property is good.
The application discloses injection molding method of injection mold based on above-mentioned slider that prevents hits thimble includes following step:
and (3) closing the injection mold, if the ejection mechanism 3 does not retract in place, the anti-collision ejector pin rod 31 is positioned in the movable insertion hole 212, and the anti-collision ejector pin rod 31 limits the slide block body 21 to be close to an ejector pin impacting the ejection mechanism 3, so that the aim of preventing the slide block from impacting the ejector pin is fulfilled. And adjusting the ejection mechanism 3 to retreat to the right position, namely, sliding the lower ejector plate 11 to the bottommost part. The slide block body 21 is close to the ejector pin of the ejection mechanism 3, and the front mold 5, the rear mold 7 and the slide block body 21 form an injection molding cavity.
Injection molding is carried out in the injection molding cavity, and the injection molding piece 1 is molded;
opening the injection mold, wherein the injection molding part 1 is tightly pressed on the rear mold 7 by the slider body 21, the slider body 21 is far away from the front mold 5 along with the rear mold 7, the slider body 21 slides for a set distance in the direction far away from the injection molding part 1, and the movable insertion hole 212 is coaxially aligned with the anti-collision ejector pin rod 31;
the anti-collision ejector pin rod 31 and the ejector pin of the ejection mechanism 3 are synchronously upward, the injection molding part 1 is separated from the rear mold 7, and meanwhile, the anti-collision ejector pin rod 31 penetrates out of the movable insertion hole 212.
According to the injection molding method, the characteristics of an injection molding structure are ingeniously utilized, when the mold is opened, after the slider body 21 slides away from the injection molding part 1, the movable insertion hole 212 is coaxially aligned with the anti-collision ejector pin rod 31 and is used for enabling the anti-collision ejector pin rod 31 and the ejector pin to synchronously penetrate upwards, and the injection molding part 1 and the rear mold 7 can be effectively separated; when the mold is closed, if the ejection mechanism 3 is not retracted in place, although the mold closing can lead the slide block body 21 to have a tendency of approaching the injection molding part 1, the anti-collision ejector pin rod 31 limits the sliding tendency of the slide block body 21, and the slide block body 21 is effectively prevented from impacting the ejector pin.
Regarding the injection molding method, as shown in fig. 9, in one embodiment, the injection mold further comprises a mold leg 9, the mold leg 9 is disposed at the lower layer of the rear mold 7, and the mold leg 9 comprises a movable cavity 91. The movable cavity 91 is located in the center of the mold foot 9, and the bottom plate portion of the ejector mechanism 3 moves up and down in the movable cavity 91. The ejection mechanism 3 comprises an upper ejector plate 10, a lower ejector plate 11 and a plurality of ejector rods, the ejector rods and the anti-collision ejector rod 31 sequentially penetrate through the upper ejector plate 10 and the rear mold 7 from bottom to top, and the bottom ends of the ejector rods and the bottom end of the anti-collision ejector rod 31 are abutted against the lower ejector plate 11. The top of some ejector pins is located the back-off below, and other ejector pins are located the other positions of injection molding. The upper ejector plate 10 and the lower ejector plate 11 slide up and down in the movable cavity 91 to drive the ejector rods and the anti-collision ejector rod 31 to synchronously move up and down.
In one embodiment, the injection mold further comprises a lower fixing plate 12, the lower fixing plate 12 is laid on the lower layer of the mold leg 9, the lower fixing plate 12 and the movable cavity 91 enclose to form an upper and lower sealed cavity, and two sides of the upper and lower sealed cavity are open. The lower fixing plate 12 can form a sealed cavity together with the movable cavity 91, and meanwhile, the injection mold is fixedly connected with an external structure conveniently.
As shown in fig. 10 and 11, in one embodiment, the injection mold further includes two pressing bars 71, the two pressing bars 71 are fixed to the rear mold 7, the two pressing bars 71 form a slide way, and the slider body 21 slides on the slide way. The slider body 21 is slidably held between the two beads 71. The side of the slider body 21 away from the injection molding part 1 is obliquely provided with a sliding guide wear plate 24, and the front mold 5 is provided with a reinforced driving surface 51 corresponding to the sliding guide wear plate 24. The reinforced driving surface 51 of the front mold 5 provides guidance for the slide guiding wear plate 24 of the slide body 21 to facilitate the mutual clamping of the front mold 5 and the rear mold 7.
In one embodiment, the slider mechanism 2 further includes a durable plate 23 and a stopper 25, and the durable plate 23 is laid on the bottom surface of the slider body 21. The sliding block body 21 slides between the two pressing strips, the bottom surface of the sliding block body 21 slides on the upper surface of the template resistant plate 23 in a friction mode, and the template resistant plate 23 can reduce abrasion loss caused by sliding friction. The limiting block 25 is fixed on the top surface of the rear mold 7 and is used for limiting the injection molding part 1 to slide out of the two pressing strips 71. When the front mold 5 and the rear mold 7 are opened, the slider body 21 slides for a set distance in the direction away from the injection molding part 1, and at the moment, the slider body 21 just contacts the limiting block 25.
As shown in fig. 10, in one embodiment, the slider mechanism 2 further includes an inclined guide post 22, and an inclined guide post hole 211 is provided inside the slider body 21; the top end of the angle guide post 22 is fixed to the front mold 5, and the bottom end thereof is inserted into the angle guide post hole 211. Specifically, the top end of the angle guide post 22 is fixed to the fixing block 26, and the fixing block 26 is fixed to the front mold 5. When the injection mold is opened, the slider body 21 slides in the direction away from the injection molding part 1 under the guiding action of the inclined guide post 22 and the inclined guide post hole 211, and after the slider body slides, the movable insertion hole 212 is coaxially aligned with the anti-collision ejector pin rod 31, so that the injection molding part 1 can be ejected subsequently. When the mold is closed, the slide block body 21 slides towards the direction close to the injection molding part 1 under the guiding action of the inclined guide post 22 and the inclined guide post hole 211, and at the moment, if the ejection mechanism 3 retreats to the right position, the slide block body 21 normally slides; if the ejector mechanism 3 is not retracted in place, the slider body 21 is restricted from sliding by the anti-knock pin 31.
As shown in fig. 10 and 11, in one embodiment, the cross section of the oblique guide post hole 211 is U-shaped, after mold clamping, the oblique guide post 22 is tightly attached to the inner wall of the oblique guide post hole 211 close to the injection molded part 1, and a certain gap is formed between the oblique guide post 22 and the inner wall of the oblique guide post hole 211 far from the injection molded part 1. The utility model provides an injection mold, the U-shaped shape design benefit of oblique guide pillar hole 211, the oblique guide pillar hole 211 of U-shaped makes at the initial period of die sinking, and slider body 21 is motionless for back mould 7, has one section distance after between back mould 7 and front mould 5, and slider body 21 just slides for back mould 7. The U-shaped inclined guide post hole 211 changes the phase to reduce the die opening resistance (in the prior art, the circular inclined guide post hole 211 can slide and abut against the front die 5 in the initial die opening stage, so that the die opening is facilitated.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The previous description is only an example of the present application, and is provided to enable any person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a prevent that slider from hitting injection mold of thimble, its contains slider mechanism (2) and ejection mechanism (3), its characterized in that:
the injection mold further comprises an anti-collision ejector rod (31), the bottom end of the anti-collision ejector rod (31) vertically penetrates through the rear mold (7) and is connected to the bottom plate part of the ejection mechanism (3), and the anti-collision ejector rod (31) and the ejection mechanism (3) are ejected out or retracted synchronously; a sliding block body (21) of the sliding block mechanism (2) is vertically provided with a movable insertion hole (212);
when a front mold (5) and a rear mold (7) of the injection mold are opened, the slider body (21) is far away from the front mold (5) after the rear mold (7), the slider body (21) slides for a set distance in the direction far away from an injection molding piece (1), and after the slider body slides, the movable insertion hole (212) is coaxially aligned with the anti-collision thimble rod (31); when the injection mold is closed and the ejection mechanism (3) is not retracted in place, the anti-collision ejector pin rod (31) is positioned in the movable insertion hole (212) to limit the slide block body (21) to be close to an ejector pin impacting the ejection mechanism (3).
2. The injection mold for preventing the slide block from knocking against the ejector pin as claimed in claim 1, wherein: the injection mold further comprises mold feet (9), the mold feet (9) are arranged on the lower layer of the rear mold (7), and the mold feet (9) comprise movable cavities (91);
the ejection mechanism (3) comprises an upper ejector plate (10), a lower ejector plate (11) and a plurality of ejector rods, the ejector rods and the anti-collision ejector rod (31) sequentially penetrate through the upper ejector plate (10) and the rear die (7) from bottom to top, and the top ends of part of the ejector rods are positioned below the back-off; the upper ejector plate (10) and the lower ejector plate (11) slide up and down in the movable cavity (91).
3. The injection mold for preventing the slide block from knocking against the ejector pin as claimed in claim 2, wherein: the injection mold further comprises a lower fixing plate (12), the lower fixing plate (12) is laid on the lower layer of the mold foot (9), and the lower fixing plate (12) and the movable cavity (91) are enclosed to form an upper sealing cavity and a lower sealing cavity.
4. The injection mold for preventing the slide block from hitting the thimble according to claim 1, wherein: the injection mold further comprises two pressing strips (71), the two pressing strips (71) are fixed on the rear mold (7), and the slider body (21) can be clamped between the two pressing strips (71) in a sliding mode;
one side of the slider body (21) far away from the injection molding part (1) is obliquely provided with a sliding guide wear-resisting plate (24), and the front die (5) is provided with a reinforced driving surface (51) corresponding to the sliding guide wear-resisting plate (24).
5. The injection mold for preventing the slide block from hitting the thimble according to claim 4, wherein: the sliding block mechanism (2) further comprises a resistant template (23) and a limiting block (25), wherein the resistant template (23) is laid on the bottom surface of the sliding block body (21); and the limiting blocks (25) are fixed on the top surface of the rear mold (7) and are used for limiting the injection molding part (1) to slide out of the two pressing strips (71).
6. The injection mold for preventing the slide block from knocking against the ejector pin as claimed in claim 1, wherein: the sliding block mechanism (2) further comprises an inclined guide post (22), and an inclined guide post hole (211) is formed in the sliding block body (21); the top end of the inclined guide post (22) is relatively fixed on the front die (5), and the bottom end of the inclined guide post is inserted into the inclined guide post hole (211); when the injection mold is opened, the slider body (21) slides towards the direction far away from the injection molding part (1) under the action of the inclined guide post (22) and the inclined guide post hole (211), and after the slider body slides, the movable insertion hole (212) is coaxially aligned to the anti-collision ejector pin rod (31).
7. The injection mold for preventing the slide block from knocking against the ejector pin as claimed in claim 6, wherein: the cross section of the inclined guide post hole (211) is U-shaped, after die assembly, the inclined guide post (22) is tightly attached to the inner wall of the inclined guide post hole (211) close to the injection molding part (1), and a certain gap is formed between the inclined guide post (22) and the inner wall of the inclined guide post hole (211) far away from the injection molding part (1).
8. The injection mold for preventing the slide block from knocking against the ejector pin as claimed in claim 1, wherein: a1 mm gap is formed between the top surface of the anti-collision thimble rod (31) and the bottom surface of the slider body (21), and the diameter of the movable insertion hole (212) is 1mm larger than that of the anti-collision thimble rod (31).
9. An injection molding method of the injection mold for preventing the slide block from knocking the thimble according to claim 1, comprising the following steps:
the injection mold is closed, if the ejection mechanism (3) is not retracted in place, the anti-collision ejector rod (31) is positioned in the movable insertion hole (212), and the anti-collision ejector rod (31) limits the slide block body (21) to be close to an ejector pin impacting the ejection mechanism (3); the ejection mechanism (3) is adjusted to retract to the right position, the sliding block body (21) is close to a thimble of the ejection mechanism (3), and the front die (5), the rear die (7) and the sliding block body (21) form an injection molding cavity;
injection molding of the injection molding cavity, and molding of the injection molding piece (1);
opening the injection mold, wherein the injection molding part (1) is tightly pressed on the rear mold (7) by the slide block body (21), the rear mold (7) is far away from the front mold (5), and the slide block body (21) slides for a set distance in the direction far away from the injection molding part (1); the movable insertion hole (212) is coaxially aligned with the anti-collision thimble rod (31);
the thimbles of the anti-collision thimble rod (31) and the ejection mechanism (3) are upward synchronously, the injection molding piece (1) is separated from the rear mold (7), and the anti-collision thimble rod (31) penetrates out of the movable insertion hole (212).
10. The injection molding method of the injection mold for preventing the slider from striking against the thimble according to claim 9, wherein: the sliding block mechanism (2) further comprises an inclined guide post (22), and an inclined guide post hole (211) is formed in the sliding block body (21); the top end of the inclined guide post (22) is relatively fixed on the front die (5), and the bottom end of the inclined guide post is inserted into the inclined guide post hole (211); the cross section of the inclined guide post hole (211) is U-shaped, after die assembly is carried out, the inclined guide post (22) is tightly attached to the inner wall of the inclined guide post hole (211) close to the injection molding piece (1), and a certain gap is formed between the inclined guide post (22) and the inner wall of the inclined guide post hole (211) far away from the injection molding piece (1);
and (3) opening the injection mold, and sliding the slider body (21) in the direction far away from the injection molding part (1) under the action of the inclined guide post (22) and the inclined guide post hole (211).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210912851.8A CN115302723A (en) | 2022-07-31 | 2022-07-31 | Injection mold capable of preventing sliding block from colliding with ejector pin and injection molding method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210912851.8A CN115302723A (en) | 2022-07-31 | 2022-07-31 | Injection mold capable of preventing sliding block from colliding with ejector pin and injection molding method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115302723A true CN115302723A (en) | 2022-11-08 |
Family
ID=83859481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210912851.8A Pending CN115302723A (en) | 2022-07-31 | 2022-07-31 | Injection mold capable of preventing sliding block from colliding with ejector pin and injection molding method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115302723A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204894393U (en) * | 2015-08-28 | 2015-12-23 | 广州友成机工有限公司 | Be applied to thimble collision avoidance subassembly of mould |
| CN208978187U (en) * | 2018-09-20 | 2019-06-14 | 广东杰思通讯股份有限公司 | Injection mold with center lift-out structure |
| CN210651713U (en) * | 2019-07-26 | 2020-06-02 | 东莞市景宏塑胶模具有限公司 | Prevent that thimble from pushing up mould structure of hitting slider |
| CN210679495U (en) * | 2019-09-09 | 2020-06-05 | 无锡瑞朗科技有限公司 | Slide block and thimble anti-collision mechanism |
| CN213321485U (en) * | 2020-07-16 | 2021-06-01 | 东莞市欧若拉精密塑料制品有限公司 | Ejection mechanism and injection mold |
-
2022
- 2022-07-31 CN CN202210912851.8A patent/CN115302723A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204894393U (en) * | 2015-08-28 | 2015-12-23 | 广州友成机工有限公司 | Be applied to thimble collision avoidance subassembly of mould |
| CN208978187U (en) * | 2018-09-20 | 2019-06-14 | 广东杰思通讯股份有限公司 | Injection mold with center lift-out structure |
| CN210651713U (en) * | 2019-07-26 | 2020-06-02 | 东莞市景宏塑胶模具有限公司 | Prevent that thimble from pushing up mould structure of hitting slider |
| CN210679495U (en) * | 2019-09-09 | 2020-06-05 | 无锡瑞朗科技有限公司 | Slide block and thimble anti-collision mechanism |
| CN213321485U (en) * | 2020-07-16 | 2021-06-01 | 东莞市欧若拉精密塑料制品有限公司 | Ejection mechanism and injection mold |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108454034B (en) | Bent pin secondary core-pulling mechanism of refrigerator door frame injection mold | |
| CN110815735A (en) | Demoulding structure of injection mould for decorative plate on automobile column | |
| CN115302723A (en) | Injection mold capable of preventing sliding block from colliding with ejector pin and injection molding method thereof | |
| CN217476489U (en) | Mold opening advanced ejection structure | |
| CN111231233A (en) | Three-plate mold | |
| CN110834077A (en) | New energy automobile control lever die casting die | |
| CN216373206U (en) | Built-in secondary ejection structure of plastic mould thimble board | |
| CN212147378U (en) | Straight-ejection inner core-pulling mechanism of injection mold | |
| CN213860444U (en) | Three-plate mold capable of reducing thickness of mold | |
| CN210851120U (en) | Core-pulling structure in sliding block | |
| CN212171189U (en) | Inclined top early return position mechanism of injection mold | |
| CN107364086B (en) | Forming mechanism for back-off type injection mold | |
| CN111873332A (en) | Demoulding mechanism and mould adopting same | |
| CN211683296U (en) | Mold opening structure for sequentially pulling cores of heterodromous combined slide block | |
| CN218256522U (en) | Rear mold internal core-pulling mold with hollow structure | |
| CN111113818B (en) | Sequential core-pulling and die-opening structure of anisotropic combined sliding block and core-pulling method of die | |
| CN220095419U (en) | Deep hole detection box injection mold secondary ejection mechanism | |
| CN220314028U (en) | Mould core and injection mould capable of realizing ejection of product after avoiding position in slide linkage mode | |
| CN213166616U (en) | Injection mould | |
| CN219855835U (en) | Front mould oblique drawing injection mold structure | |
| CN218399270U (en) | Novel rear mold core pulling structure | |
| CN220052685U (en) | Spring bending pin and sliding block combined upper side and lower side core pulling mechanism of automobile threshold injection mold | |
| CN220362918U (en) | Soft and hard glue injection mold of automobile side plate | |
| CN214562702U (en) | Combined delay core-pulling mechanism of injection mold | |
| CN217144752U (en) | Triple ejection die |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |