CN111873330A - Injection mold based on delayed ejection structure - Google Patents
Injection mold based on delayed ejection structure Download PDFInfo
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- CN111873330A CN111873330A CN202010824693.1A CN202010824693A CN111873330A CN 111873330 A CN111873330 A CN 111873330A CN 202010824693 A CN202010824693 A CN 202010824693A CN 111873330 A CN111873330 A CN 111873330A
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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
- B29C45/38—Cutting-off equipment for sprues or ingates
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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
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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
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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
- B29C2045/4063—Removing or ejecting moulded articles preventing damage to articles caused by the ejector
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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 relates to the technical field of molds, in particular to an injection mold based on a time-delay ejection structure, which comprises a transmission frame, a first mold cavity and a second mold cavity which can slide on the transmission frame, a first driving device for driving the first mold cavity to slide on the transmission frame and a second driving device for driving the second mold cavity, wherein the first mold cavity comprises a first mold base, a first molding cavity arranged on the first mold base, an ejection assembly movable on the first mold base, a first driving plate connected with the ejection assembly and an ejector pin arranged on the ejection assembly; according to the invention, in the demolding process, the product is ejected out through the ejection assembly after the mold is opened, so that the delayed ejection effect is realized, the problems of damage to the product and the like are prevented, the demolding effect is good, and the product quality is improved.
Description
Technical Field
The invention relates to the technical field of molds, in particular to an injection mold based on a delayed ejection structure.
Background
The mold is an important equipment indispensable in injection molding. Injection molding is a method of injecting a raw material having a certain temperature into a gap formed between a male mold and a female mold to form a product. The injection molding method has the characteristics of low molding cost, short molding period, simple molding process and the like, so the method is very commonly applied in the field of product manufacturing.
Generally, when the mold is opened, namely when two groups of molds are separated, the ejector pins eject the product out immediately, no time delay exists completely, the product does not have enough time to be cooled, and in the demolding process, the phenomenon of blank ejection of the product is easy to occur, and occasionally the product is pulled to affect the quality of the product.
Disclosure of Invention
In order to solve the problems, the invention provides the injection mold based on the delayed ejection structure, which has the advantages that the product is ejected out through the ejection assembly after the mold is opened in the demolding process, the delayed ejection effect is realized, the problems of damage to the product and the like are solved, the demolding effect is good, and the product quality is improved.
The technical scheme adopted by the invention is as follows: an injection mold based on a delayed ejection structure comprises a transmission frame, a first mold cavity and a second mold cavity which can slide on the transmission frame, a first driving device for driving the first mold cavity to slide on the transmission frame, and a second driving device for driving the second mold cavity;
the further improvement of the scheme is that the first mold cavity comprises a first mold seat, a first molding cavity arranged on the first mold seat, an ejection assembly movable on the first mold seat, a first driving plate connected with the ejection assembly and an ejector pin arranged on the ejection assembly;
the technical scheme is further improved in that the ejection assembly comprises a first plate body and a second plate body fixedly attached and connected with the first plate body, a time delay slot is formed between the first plate body and the second plate body, and the ejector pin is movable in the time delay slot; the thimble comprises a limiting end, a pushing end and a fixed end, the fixed end is fixed on the first driving plate, the limiting end moves in the time slot, and the pushing end extends to the first molding cavity;
the second mold cavity comprises a second mold seat, a second molding cavity which is arranged on the second mold seat and corresponds to the first molding cavity, a second driving plate which is fixedly connected to the second mold seat, and a cutting assembly which is arranged on the second mold seat and extends to the second molding cavity;
the second mold seat comprises a main body seat and a cutting seat, a cutting cavity is arranged between the main body seat and the cutting seat, the cutting assembly is arranged in the cutting cavity, an injection molding cavity is formed in one side, close to the cutting cavity, of the main body seat, and the injection molding cavity is communicated with the second molding cavity;
the further improvement of the scheme is that the cutting-off assembly comprises an oblique driving rod, a linkage rod connected with the oblique driving rod, a plurality of groups of cutters arranged on the linkage rod and an elastic resetting piece arranged in the slitting cavity and used for resetting the linkage rod.
The transmission frame comprises at least four groups of guide posts which are vertically or horizontally arranged, guide sleeves are arranged on the first die cavity and the second die cavity and are used for transmitting the guide posts, fixing plates are arranged at the head end and the tail end of each guide post, and the first driving device and the second driving device are respectively arranged on the fixing plates at the two ends.
The further improvement to the above scheme is that the slitting cavity is obliquely arranged, a driving groove, a linkage groove, a cutting groove and a resetting groove are correspondingly arranged on the slitting cavity, the oblique driving rod moves in the driving groove, the linkage rod moves in the linkage groove, the cutter moves in the cutting groove, and the elastic resetting groove is formed by a plurality of groups of springs and is arranged in the resetting groove.
The further improvement of the scheme is that the first driving device is arranged as a hydraulic cylinder and is in driving connection with the first driving plate;
the first driving device comprises a first cylinder body, a first cover plate and a second cover plate which are respectively arranged at the head end and the tail end of the first cylinder body, a first driving rod movably arranged in the first cylinder body, and a first hydraulic connector and at least two groups of second hydraulic connectors which are arranged outside the first cylinder body and communicated to the first cylinder body.
The further improvement of the above scheme is that a hydraulic accelerating block is arranged in the first cylinder body and close to the first cover plate, a propelling hole is formed in the first hydraulic accelerating block corresponding to the first driving rod, and a first oil way is arranged on the first hydraulic connector and communicated to the propelling hole.
The further improvement of the scheme is that the first driving rod is connected with a first piston sleeve, the first piston sleeve is movably arranged in the first cylinder body to form a driving cavity and a reset cavity, and the two groups of second hydraulic connectors respectively correspond to the driving cavity and the reset cavity;
in a further development of the above, the drive chamber is connected to the drive chamber and centrally corresponds to the first piston sleeve.
The further improvement of the scheme is that the second driving device is a rotary hydraulic cylinder and is connected with the second driving plate;
the second driving device comprises a second cylinder body, a third cover plate and a fourth cover plate which are respectively arranged at the head end and the tail end of the second cylinder body, a second driving rod which is movable in the second cylinder body, and at least two groups of third hydraulic connectors which are arranged in the second cylinder body and communicated to the cylinder body.
The further improvement of the scheme is that a rotary guide block is arranged at the position, close to the third cover plate, of the second cylinder body, a guide shaft is arranged on the rotary guide block, and a guide wheel is arranged on the guide shaft; the outer diameter of the second driving rod is provided with a guide groove, and the guide wheel is driven in the guide groove;
the technical scheme is further improved in that the guide groove comprises a first straight line end, a rotating end and a second straight line end, the rotating end is communicated with the second straight line end in a rotating mode from the first straight line end, and the rotating angle of the rotating end ranges from 60 degrees to 180 degrees.
The further improvement of the above scheme is that the second drive plate is provided with a rotary seat and connected with the second drive rod, the second drive plate is positioned at the outer edge of the rotary seat and is provided with a rotary drive groove, the oblique drive rod extends to the rotary drive groove, the second drive rod is connected with a drive plate which can rotate in the rotary drive groove, and the drive plate is provided with an oblique drive block for driving the oblique drive rod.
The invention has the beneficial effects that:
compared with the traditional mold demoulding, the mold demoulding device adopts a delayed ejection demoulding structure, after the product is subjected to injection molding, the injection port is cut off under the driving of the second driving device, then the first driving device drives the first mold cavity to demould, and in the demoulding process, the product is ejected out through the ejection assembly after the mold is opened, so that the delayed ejection effect is realized, the problems of damage to the product and the like are prevented, and the demoulding effect is good. Specifically, set up the driving frame, slidable in the first mould cavity and the second mould cavity of driving frame, be used for driving first mould cavity gliding first drive arrangement on the driving frame and be used for driving the second drive arrangement of second mould cavity, adopt two sets of moulds all to follow the driving frame transmission, adopt solitary drive structure to connect the drive, make things convenient for structural control, can realize multi-functional cooperation, the practicality is strong, promotes product quality.
The first mold cavity comprises a first mold seat, a first molding cavity arranged in the first mold seat, an ejection assembly moving on the first mold seat, a first drive plate connected with the ejection assembly and an ejector pin arranged on the ejection assembly, the first drive plate is connected with a first drive device to realize driving, the structure is simple, the use is convenient, furthermore, the ejection assembly comprises a first plate body and a second plate body fixedly attached and connected with the first plate body, a time delay groove is formed between the first plate body and the second plate body, the time delay groove is movably provided with the ejector pin, the ejector pin comprises a limiting end, an ejection end and a fixed end, the fixed end is fixed on the first drive plate, the limiting end moves in the time delay groove, and the ejection end extends to the first molding cavity; the time delay slot formed by the matching of the two groups of plate bodies is convenient to process, meanwhile, the thimble is convenient to install, one of the two groups of plate bodies extends to limit in the demoulding process under the action of the limiting end in the moving process, the specific time can be set according to the size of the time delay slot, and the practicability is high.
The second mold cavity comprises a second mold seat, a second molding cavity, a second drive plate and a cutting assembly, wherein the second molding cavity is arranged on the second mold seat and corresponds to the first molding cavity, the second drive plate is fixedly connected to the second mold seat, the cutting assembly is arranged on the second mold seat and extends to the second molding cavity, the cutting assembly is specifically arranged to cut off a water gap in the injection molding process, convenience in demolding is improved, and an additional dehydration opening is not needed.
The second mold seat comprises a main body seat and a cutting seat, a cutting cavity is arranged between the main body seat and the cutting seat, the cutting assembly is arranged in the cutting cavity, an injection molding cavity is formed in one side, close to the cutting cavity, of the main body seat, and the injection molding cavity is communicated with the second molding cavity; the cutting assembly is arranged through the cutting cavity, the processing of the whole structure can be facilitated, and the molding of the die is not influenced when the cutting cavity is used.
The cutting assembly comprises an oblique driving rod, a linkage rod connected to the oblique driving rod, a plurality of groups of cutters arranged on the linkage rod and an elastic reset piece arranged in the slitting cavity and used for resetting the linkage rod, the cutting structure drives the linkage rod through the oblique driving rod, the plurality of groups of cutters are driven by the linkage rod to cut off the water gap, and the elastic reset assembly is arranged to reset through the elastic action after the water gap is cut off.
Drawings
FIG. 1 is a schematic perspective view of an injection mold based on a delayed ejection structure according to the present invention;
FIG. 2 is a schematic diagram of a side view of a first mold cavity of the injection mold based on the delayed ejection structure in FIG. 1;
FIG. 3 is a schematic sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic diagram of a side view of a second mold cavity of the injection mold based on the delayed ejection structure in FIG. 1;
FIG. 5 is a schematic cross-sectional view taken along line B-B in FIG. 4;
FIG. 6 is a schematic side view of a first driving device of the injection mold based on the delayed ejection structure in FIG. 1;
FIG. 7 is a schematic cross-sectional view taken along line C-C of FIG. 6;
FIG. 8 is a schematic side view of a second driving device of the injection mold based on the delayed ejection structure in FIG. 1;
FIG. 9 is a schematic cross-sectional view taken along line D-D of FIG. 8;
FIG. 10 is an enlarged view taken at A in FIG. 9;
fig. 11 is a schematic structural view of the slant driving rod and the slant driving block according to the present invention.
Description of reference numerals: the mold comprises a transmission frame 100, a guide shaft 110, a fixing plate 120, a first mold cavity 200, a first mold base 210, a first molding cavity 220, an ejection assembly 230, a first plate 231, a second plate 232, a delay slot 233, a first driving plate 240, an ejector pin 250, a limiting end 251, an ejection end 252, a fixed end 253, a second mold cavity 300, a second mold base 310, a main body base 311, a slitting base 312, a slitting base 313, an injection molding cavity 314, a second molding cavity 320, a second driving plate 330, a rotating base 331, a rotating driving slot 332, a cutting assembly 340, a slant driving rod 341, a linkage rod 342, a cutter 343, an elastic reset piece 344, a first driving device 400, a first cylinder body 410, a first cover plate 420, a second cover plate 430, a first driving rod 440, a first piston sleeve 441, a first hydraulic connector 450, a second hydraulic connector 460, a hydraulic acceleration block 470, a pushing hole, a second driving device 500, a second cylinder body 510, a delay slot 233, a delay slot 313, The hydraulic drive mechanism comprises a third cover plate 520, a fourth cover plate 530, a second drive rod 540, a guide groove 541, a first straight line end 541a, a rotating end 541b, a second straight line end 541c, a drive disc 542, an oblique drive block 543, a third hydraulic connector 550, a rotating guide block 560, a guide shaft 561 and a guide wheel 562.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 11, an injection mold based on a delayed ejection structure includes a transmission frame 100, a first mold cavity 200 and a second mold cavity 300 that are slidable on the transmission frame 100, a first driving device 400 for driving the first mold cavity 200 to slide on the transmission frame 100, and a second driving device 500 for driving the second mold cavity 300.
The transmission frame 100 comprises at least four groups of guide shafts 110 which are vertically or horizontally arranged, guide sleeves are arranged on the first die cavity 200 and the second die cavity 300 to transmit to the guide shafts 110, fixing plates 120 are arranged at the head end and the tail end of each guide shaft 110, the first driving device 400 and the second driving device 500 are respectively arranged on the fixing plates 120 at the two ends, and by adopting the structure of the at least four groups of guide shafts 110, the guide transmission is stable and reliable, and the die forming precision is high.
Referring to fig. 2 to 3, the first mold cavity 200 includes a first mold base 210, a first mold cavity 220 opened in the first mold base 210, an ejection assembly 230 movably disposed on the first mold base 210, a first driving plate 240 connected to the ejection assembly 230, and a thimble 250 mounted on the ejection assembly 230, the first driving plate 240 is connected to the first driving device 400 to realize driving, the structure is simple, the use is convenient, further, the ejection assembly 230 comprises a first plate 231 and a second plate 232 fixedly attached to the first plate 231, a time delay slot 233 is disposed between the first board 231 and the second board 232, the time delay slot 233 is movably mounted with a thimble 250, the thimble 250 includes a position-limiting end 251, an ejecting end 252 and a fixing end 253, the fixing end 253 is fixed to the first driving plate 240, the limiting end 251 is movably arranged in the delay groove 233, and the ejecting end 252 extends to the first molding cavity 220; the time delay groove 233 formed by matching the two sets of plate bodies is convenient to process, meanwhile, the thimble 250 is convenient to install, an extending limiting effect is achieved in the demolding process under the action of the limiting end 251 in the moving process, the specific time can be set according to the size of the time delay groove 233, and the practicability is high.
Referring to fig. 4 to 5, the second mold cavity 300 includes a second mold base 310, a second mold cavity 320 opened in the second mold base 310 and corresponding to the first mold cavity 220, a second driving plate 330 fixedly connected to the second mold base 310, and a cutting assembly 340 disposed on the second mold base 310 and extending to the second mold cavity 320, specifically, the cutting assembly 340 is disposed to cut off a water gap in an injection molding process, so as to improve convenience of demolding without requiring an additional dehydration opening.
The second mold seat 310 comprises a main body seat 311 and a slitting seat 312, a slitting cavity 313 is arranged between the main body seat 311 and the slitting seat 312, the cutting assembly 340 is arranged in the slitting cavity 313, an injection molding cavity 314 is formed in one side, close to the slitting cavity 313, of the main body seat 311, and the injection molding cavity 314 is communicated with the second molding cavity 320; the installation of the severing assembly 340 through the slitting chamber 313 facilitates the manufacture of the overall structure, without the slitting chamber 313 interfering with the moulding of the mould during use.
The cutting assembly 340 comprises an oblique driving rod 341, a linkage rod 342 connected to the oblique driving rod 341, a plurality of groups of cutters 343 arranged on the linkage rod 342, and an elastic reset piece 344 arranged in the slitting cavity 313 and used for resetting the linkage rod 342, the cutting structure is that the linkage rod 341 drives the linkage rod 342, the linkage rod 342 drives the plurality of groups of cutters 343 to cut off the water gap, and the elastic reset assembly is arranged to reset through the elastic action after the water gap is cut off.
The dividing and cutting cavity 313 is obliquely arranged and correspondingly provided with a driving groove, a linkage groove, a cutting groove and a reset groove, the inclined driving rod 341 moves in the driving groove, the linkage rod 342 moves in the linkage groove, the cutter 343 moves in the cutting groove, and the elastic reset groove is formed by installing a plurality of groups of springs in the reset groove. Adopt the slope structure setting, conveniently cut off the mouth of a river, direct slant cuts off, and is fast, and stability is good.
Referring to fig. 6 to 7, in the present embodiment, the first driving device 400 is a hydraulic cylinder, and is drivingly connected to the first driving plate 240.
The first driving device 400 includes a first cylinder 410, a first cover plate 420 and a second cover plate 430 respectively disposed at the head and tail ends of the first cylinder 410, a first driving rod 440 movably disposed in the first cylinder 410, a first hydraulic connector 450 disposed outside the first cylinder 410 and communicated to the first cylinder 410, and at least two sets of second hydraulic connectors 460, wherein the hydraulic connectors are used for connecting hydraulic pipes and hydraulic stations during operation, and are used for driving a hydraulic cylinder, and the first driving rod 440 and the first driving plate 240 are driven to realize transmission under the action of hydraulic drive.
The hydraulic accelerating block 470 is arranged in the first cylinder body 410 and close to the first cover plate 420, the first hydraulic accelerating block 470 is provided with a pushing hole 471 corresponding to the first driving rod 440, the first hydraulic connector 450 is provided with a first oil path communicated to the pushing hole 471, and the pushing hole 471 and the first hydraulic accelerating block 470 are matched to enhance the driving force of the hydraulic cylinder.
First actuating lever 440 is connected with first piston cover 441, first piston cover 441 activity in first cylinder body 410 forms drive chamber and the chamber that resets, and two sets of second hydraulic pressure connector 460 correspond drive chamber and the chamber that resets respectively, drives first actuating lever 440 through first piston cover 441 and moves about in first cylinder body 410, promotes the stability of structure, connects hydraulic pressure station through two sets of hydraulic pressure connectors in the transmission process and is used for the drive, connects conveniently.
The pushing hole 471 is communicated to the driving cavity and centrally corresponds to the first piston sleeve 441, and the pushing force is more uniform and stable in the pushing process through the centered arrangement of the pushing hole 471.
Referring to fig. 8 to 9, the second driving device 500 is a rotary hydraulic cylinder, and is connected to the second driving plate 330; the driving action can be further realized by the action of the rotary hydraulic cylinder.
The second driving device 500 comprises a second cylinder 510, a third cover plate 520 and a fourth cover plate 530 respectively arranged at the head end and the tail end of the second cylinder 510, a second driving rod 540 movable in the second cylinder 510, and at least two groups of third hydraulic connectors 550 arranged in the second cylinder 510 and communicated to the cylinders.
A rotary guide block 560 is mounted on the second cylinder 510 near the third cover 520, a guide shaft 561 is mounted on the rotary guide block 560, and a guide wheel 562 is mounted on the guide shaft 561; the outer diameter of the second driving rod 540 is provided with a guide groove 541, the guide wheel 562 is driven in the guide groove 541, the rotation guide effect can be realized through the matching of the guide groove 541 and the rotation guide block 560, the second driving rod 540 rotates along the guide groove 541, a bearing is arranged between the second driving rod 540 and the second movable plug to act on rotation, and therefore the second driving rod 540 can rotate, and can further act on rotation in the driving process.
Referring to fig. 10, the guide groove 541 includes a first straight end 541a, a rotation end 541b and a second straight end 541c, the rotation end 541b is rotatably communicated to the second straight end 541c from the first straight end 541a, the rotation angle of the rotation end 541b is 60 ° -180 °, the second driving rod 540 can be linearly driven by the straight end, and is rotated when being driven to the rotation end 541b, the guide groove 541 can be unlocked according to a stroke position that needs to be rotated, the rotation angle is generally preferably 90 °, 90 ° rotation driving can be realized, and the driving effect is good.
Referring to fig. 11, the second driving plate 330 is provided with a rotating base 331 connected to the second driving rod 540, the second driving plate 330 is located at the outer edge of the rotating base 331 and is provided with a rotating driving groove 332, the oblique driving rod 341 extends to the rotating driving groove 332, the second driving rod 540 is connected to a driving disk 542 which is rotatable in the rotating driving groove 332, the driving disk 542 is provided with an oblique driving block 543 for driving the oblique driving rod 341, specifically, the driving disk 542 can rotate inside through the rotating driving groove 332, the oblique driving block 543 and the oblique driving rod 341 are matched to realize rotation driving in the rotating process, the rotating effect is good, the oblique driving rod 341 is driven to drive the driving rod 342 and the cutter linkage 343 to cut off the nozzle, the structure is reset through the rotating effect after the rotation is completed, and the cutter 343 returns to the original position.
According to the invention, a delayed ejection demoulding structure is adopted, after the product is subjected to injection moulding, the injection moulding opening is cut off under the driving of the second driving device 500, then the first driving device 400 is used for driving the first mould cavity 200 to demould, and in the demoulding process, the product is ejected out through the ejection assembly 230 after the mould is opened, so that the delayed ejection effect is realized, the problems of damage to the product and the like are prevented, and the demoulding effect is good. Specifically, set up driving frame 100, slidable in driving frame 100 first mould cavity 200 and second mould cavity 300, be used for driving first mould cavity 200 gliding first drive arrangement 400 on driving frame 100 and be used for driving second mould cavity 300's second drive arrangement 500, adopt two sets of moulds all to follow driving frame 100 transmission, adopt solitary drive structure to connect the drive, make things convenient for structural control, can realize multi-functional cooperation, the practicality is strong.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides an injection mold based on ejecting structure of time delay which characterized in that: the die comprises a transmission frame, a first die cavity and a second die cavity which can slide on the transmission frame, a first driving device for driving the first die cavity to slide on the transmission frame and a second driving device for driving the second die cavity;
the first mold cavity comprises a first mold seat, a first molding cavity arranged on the first mold seat, an ejection assembly movable on the first mold seat, a first driving plate connected with the ejection assembly and an ejector pin arranged on the ejection assembly;
the ejection assembly comprises a first plate body and a second plate body fixedly attached and connected with the first plate body, a time delay slot is formed between the first plate body and the second plate body, and the ejector pin is movable in the time delay slot; the thimble comprises a limiting end, a pushing end and a fixed end, the fixed end is fixed on the first driving plate, the limiting end moves in the time slot, and the pushing end extends to the first molding cavity;
the second mold cavity comprises a second mold seat, a second molding cavity which is arranged on the second mold seat and corresponds to the first molding cavity, a second driving plate fixedly connected to the second mold seat and a cutting assembly which is arranged on the second mold seat and extends to the second molding cavity;
the second mold seat comprises a main body seat and a cutting seat, a cutting cavity is arranged between the main body seat and the cutting seat, the cutting assembly is arranged in the cutting cavity, an injection molding cavity is formed in one side, close to the cutting cavity, of the main body seat, and the injection molding cavity is communicated with the second molding cavity;
the cutting-off assembly comprises an oblique driving rod, a linkage rod connected to the oblique driving rod, a plurality of groups of cutters arranged on the linkage rod and an elastic reset piece arranged in the slitting cavity and used for resetting the linkage rod.
2. The delayed ejection structure-based injection mold according to claim 1, wherein: the transmission frame comprises at least four groups of guide posts which are vertically or horizontally arranged, guide sleeves are arranged on the first die cavity and the second die cavity to transmit the guide posts, fixing plates are arranged at the head end and the tail end of each guide post, and the first driving device and the second driving device are respectively arranged on the fixing plates at the two ends.
3. The delayed ejection structure-based injection mold according to claim 1, wherein: the cutting cavity is obliquely arranged, a driving groove, a linkage groove, a cutting groove and a reset groove are correspondingly formed in the cutting cavity, the oblique driving rod moves in the driving groove, the linkage rod moves in the linkage groove, the cutter moves in the cutting groove, and the elastic reset groove is formed by installing a plurality of groups of springs in the reset groove.
4. The delayed ejection structure-based injection mold according to claim 1, wherein: the first driving device is arranged as a hydraulic cylinder and is in driving connection with the first driving plate;
the first driving device comprises a first cylinder body, a first cover plate and a second cover plate which are respectively arranged at the head end and the tail end of the first cylinder body, a first driving rod movably arranged in the first cylinder body, a first hydraulic connector and at least two groups of second hydraulic connectors, wherein the first hydraulic connector and the at least two groups of second hydraulic connectors are arranged outside the first cylinder body and communicated to the first cylinder body.
5. The delayed ejection structure-based injection mold according to claim 4, wherein: a hydraulic accelerating block is arranged in the first cylinder body and close to the first cover plate, a propelling hole is formed in the first hydraulic accelerating block corresponding to the first driving rod, and a first hydraulic connector is provided with a first oil way communicated to the propelling hole.
6. The delayed ejection structure-based injection mold according to claim 5, wherein: the first driving rod is connected with a first piston sleeve, the first piston sleeve is movably arranged in the first cylinder body to form a driving cavity and a reset cavity, and the two groups of second hydraulic connecting joints respectively correspond to the driving cavity and the reset cavity;
the push hole communicates to the drive chamber and centrally corresponds to the first piston sleeve.
7. The delayed ejection structure-based injection mold according to claim 1, wherein: the second driving device is a rotary hydraulic cylinder and is connected with the second driving plate;
the second driving device comprises a second cylinder body, a third cover plate and a fourth cover plate which are respectively arranged at the head end and the tail end of the second cylinder body, a second driving rod which is movable in the second cylinder body, and at least two groups of third hydraulic connectors which are arranged in the second cylinder body and communicated to the cylinder body.
8. The delayed ejection structure-based injection mold according to claim 7, wherein: a rotary guide block is arranged at a position, close to the third cover plate, of the second cylinder body, a guide shaft is arranged on the rotary guide block, and a guide wheel is arranged on the guide shaft; the outer diameter of the second driving rod is provided with a guide groove, and the guide wheel is driven in the guide groove.
9. The delayed ejection structure-based injection mold according to claim 8, wherein: the guide groove comprises a first straight line end, a rotating end and a second straight line end, the rotating end is communicated with the second straight line end in a rotating mode from the first straight line end, and the rotating angle of the rotating end ranges from 60 degrees to 180 degrees.
10. The delayed ejection structure-based injection mold according to claim 9, wherein: the second drive plate set up the roating seat with the second actuating lever is connected, the second drive plate is located the roating seat and has seted up the rotation driving groove along outer, the slant actuating lever extends to the rotation driving groove, the second actuating lever be connected with can rotate in the driving-disc in rotation driving groove, the slant drive piece that is used for driving the slant actuating lever is installed to the driving-disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115648556A (en) * | 2022-11-18 | 2023-01-31 | 江苏惠利隆塑业集团有限公司 | Injection molding device for plastic shell |
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| CN204773303U (en) * | 2015-05-29 | 2015-11-18 | 昆山立讯精密模具有限公司 | Injection mould |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115648556A (en) * | 2022-11-18 | 2023-01-31 | 江苏惠利隆塑业集团有限公司 | Injection molding device for plastic shell |
| CN115648556B (en) * | 2022-11-18 | 2023-08-08 | 江苏惠利隆塑业集团有限公司 | Plastic housing's device of moulding plastics |
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| CN111873330B (en) | 2021-03-16 |
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