CN110919990B - Internal-drawing type double-color injection mold - Google Patents
Internal-drawing type double-color injection mold Download PDFInfo
- Publication number
- CN110919990B CN110919990B CN201911388314.2A CN201911388314A CN110919990B CN 110919990 B CN110919990 B CN 110919990B CN 201911388314 A CN201911388314 A CN 201911388314A CN 110919990 B CN110919990 B CN 110919990B
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- needle plate
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- mold
- ejector
- loose core
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- 238000002347 injection Methods 0.000 title claims abstract description 17
- 239000007924 injection Substances 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 12
- 230000001154 acute effect Effects 0.000 claims abstract description 4
- 238000001746 injection moulding Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 3
- 229920003023 plastic Polymers 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 229920001875 Ebonite Polymers 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
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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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1676—Making multilayered or multicoloured articles using a soft material and a rigid material, e.g. making articles with a sealing part
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an internal-drawing type double-color injection mold which comprises a front mold, a rear mold, an ejection mechanism, a core pulling mechanism, a fixed block and a needle plate driving mechanism, wherein the ejection mechanism is arranged at the side of the front mold and comprises a needle plate, an ejector rod and an ejector block, and the ejector block is arranged in the front mold in an embedding manner. The faller is located one side of ejector block far away from the back mould, and the ejector block is fixedly connected with the faller through the ejector rod. The loose core is arranged inside the top block and is in sliding fit with the top block, and an included angle between the relative movement direction of the loose core and the top block and the mold opening direction is an acute angle. The fixed block is located the one end of keeping away from the die cavity of moulding plastics of loosing core, and can dismantle fixedly continuous with the front mould, one side of fixed block with loose core articulates. The needle plate driving mechanism is arranged outside the front mould and the rear mould, one end of the needle plate driving mechanism is connected with the needle plate, and the other end of the needle plate driving mechanism is connected with the rear mould. The invention avoids damaging the double-color product piece by directly ejecting the die, has simple structure, utilizes the die-opening movement to drive the loose core to exit the back-off, saves the consumption of steel, reduces the cost and the process difficulty, and improves the production efficiency.
Description
Technical Field
The invention relates to the technical field of mold processing, in particular to an internal-drawing type double-color injection mold.
Background
The double-color injection mold is used for forming an injection molding product part with a hard rubber part and a soft rubber part combined into an integrated structure, the rear mold of the double-color injection mold is provided with two rear mold cavities, the front mold of the double-color injection mold is provided with two front mold cores, and the two rear mold cavities can be respectively matched with the two front mold cores. The injection molding process is divided into two parts, firstly, a hard rubber piece is injection molded, the hard rubber piece is left in a rear mold after mold opening, the rear mold is driven by an injection molding machine to rotate 180 degrees and then is matched with a front mold, a rear mold cavity with the hard rubber piece is matched with another front mold core to form a soft injection molding cavity, and after soft rubber is injected, the soft rubber is combined with the hard rubber piece molded in advance to form a bicolor product piece (see figure 1).
The double-color product piece has a back-off structure at the joint of the hard glue and the soft glue, the back-off amount is large, and the double-color product piece is directly ejected out after the die is opened, so that the soft glue part of the double-color product piece is damaged. The core pulling is needed to be added in the front film, the back-off is needed to be withdrawn before the mold is opened, the bicolor product piece is ejected, the oil cylinder is needed to be added after the core pulling is ejected, the ejection mechanism is needed to be added after the core pulling is ejected, the core pulling backing caused by injection molding pressure in the injection molding process is prevented, and the defects that the core pulling driving mechanism is complex in structure, high in manufacturing cost and high in process difficulty exist. Accordingly, the prior art is further improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an internal-drawing type double-color injection mold, which solves the problems that a product piece is damaged due to the fact that the product piece is reversely buckled in a large amount and is directly ejected after the mold is opened, and a core-pulling driving mechanism is complex in structure, high in manufacturing cost and high in process difficulty.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides an interior pull type double-colored injection mold, includes front mould, back mould, ejection mechanism, loose core, fixed block and faller actuating mechanism, ejection mechanism sets up in the front mould side, and it includes faller, ejector pin and kicking block, the kicking block is established in the front mould with the mode of inlaying.
The needle plate is positioned at one side of the ejector block away from the rear die, and the ejector block is fixedly connected with the needle plate through the ejector rod.
The loose core is arranged inside the top block and is in sliding fit with the top block, and an included angle between the relative movement direction of the loose core and the top block and the mold opening direction is an acute angle.
The fixed block is located the one end of keeping away from the die cavity of moulding plastics of loosing core, and can dismantle fixedly continuous with the front mould, one side of fixed block with loose core articulates.
The needle plate driving mechanism is arranged outside the front mould and the rear mould, one end of the needle plate driving mechanism is connected with the needle plate, and the other end of the needle plate driving mechanism is connected with the rear mould.
Further, the inside of the top block is provided with a tunnel cavity which is obliquely arranged relative to the mold opening direction, and two ends of the tunnel cavity are of an open structure.
The side wall of loosing core and the inner wall sliding fit of tunnel cavity, the outside that the one end of loosing core stretched out the kicking block just is located the die cavity of moulding plastics.
Furthermore, two ejector rods are respectively positioned at two sides of the ejector block, one end of each ejector rod is fixedly connected with the ejector block, and the other end of each ejector rod is fixedly connected with the needle plate.
Furthermore, the top of the fixed block transversely extends to one side of the loose core to form a hanging part, and a clamping groove formed by inward sinking is formed at a position corresponding to the hanging part on one side of the loose core.
The hanging part of the fixed block stretches into the clamping groove of the loose core, and the upper end face of the hanging part is in sliding fit with the inner wall of the clamping groove along the direction perpendicular to the mold opening direction.
Further, the core pulling device is provided with a through hole, and a pin rod is arranged in the through hole.
The axis of the pin rod is perpendicular to the direction of the tunnel cavity, and two ends of the pin rod extend out of the outer side of the loose core and are fixedly connected with the ejector block.
Furthermore, two lug plates are symmetrically arranged on two sides of the loose core, which are close to one end of the fixed block.
Two spring installation cavities are symmetrically arranged on two sides of the tunnel cavity, and the extending direction of the spring installation cavities is consistent with that of the tunnel cavity.
A spring is arranged in each spring mounting cavity, the main body part of the spring is positioned in the spring mounting cavity, and one end of the spring extends out of the outer side of the spring mounting cavity and is propped against the lug plate on the same side.
Further, the needle plate driving mechanisms are provided with two groups, and are symmetrically arranged at two sides of the front die, and each group of needle plate driving mechanisms at least comprises one needle plate driving machine.
The needle plate driving mechanism comprises a draw hook, a stop block and two guide blocks positioned at two sides of the draw hook, one end of the draw hook is hinged with the needle plate, and the other end of the draw hook is provided with a hook-shaped part bent to the inner side.
The stop block is arranged on the side wall of the rear die, and the hook-shaped part at the other end of the draw hook can be hung with the stop block at the same side.
The guide blocks are arranged on the side wall of the front die, the opposite sides of the two guide blocks are provided with guide grooves, two sides of the drag hook are respectively provided with a roller, and the rollers are positioned in the guide grooves on the same side.
Furthermore, the direction of the guide grooves of the two guide blocks positioned at the two sides of the drag hook is consistent, the guide grooves comprise two sections of straight grooves and one section of arc-shaped groove, and the two ends of the arc-shaped groove are respectively and smoothly transited with the two sections of straight grooves.
The two sections of linear grooves are parallel and staggered, and one section of linear groove close to the rear die is far away from the side wall of the front die relative to the other section of linear groove.
Further, one side of the needle plate, which is close to the rear mold, is provided with a return rod, one end of the return rod is fixedly connected with the needle plate, and the other end of the return rod can be matched with the rear mold.
In the process of die assembly, the rear die is contacted with the other end of the return rod, and the needle plate is driven to move through the return rod.
Furthermore, in the mold opening or closing process, the fixed block and the loose core always keep a hanging state.
By adopting the technical scheme, the invention has the beneficial technical effects that: according to the invention, the needle plate driving mechanism is arranged in the front die to drive the loose core to exit the back-off, so that the damage to the bicolor product piece caused by direct ejection is avoided, the needle plate driving mechanism is simple in structure, the loose core is driven to exit the back-off by using the die opening movement, the steel consumption is saved, the cost and the process difficulty are reduced, the die opening and the loose core exit the back-off are synchronously performed, and the production efficiency is improved.
Drawings
The construction of the two-color product piece indicated in the background of fig. 1 is schematically shown.
Fig. 2 is a schematic structural diagram of the internal drawing type double-shot injection mold after the front mold is removed.
Fig. 3 is a schematic view showing the combined structure of the front mold, the core pulling and the related components of the present invention.
Fig. 4 is a schematic view of the structure of the ejector mechanism, the needle plate driving mechanism and the related parts of the present invention.
Fig. 5 is a schematic view of a portion of the needle plate drive mechanism of fig. 4 showing the guide blocks and rollers.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
Referring to fig. 2 to 5, an internal drawing type double-color injection mold comprises a front mold 1, a rear mold 2, an ejection mechanism 3, a core pulling 4, a fixed block 5 and a needle plate driving mechanism 6, wherein the ejection mechanism 3 is arranged on the front mold 1 side and comprises a needle plate 31, an ejector rod 32 and an ejector block 33, and the ejector block 33 is arranged in the front mold 1 in an inlaid manner. The needle plate 31 is located at one side of the ejector block 33 away from the rear mold 2, and the ejector block 33 is fixedly connected with the needle plate 31 through the ejector rod 32. The ejector rods 32 of each ejection mechanism 3 are two, the two ejector rods 32 are respectively positioned at two sides of the ejector block 33, one end of each ejector rod 32 is fixedly connected with the ejector block 33, the other end of each ejector rod 32 is fixedly connected with the needle plate 31, and the needle plate 31, the ejector rods 32 and the ejector block 33 are fixedly connected together and synchronously move relative to the front die 1.
The inside of the top block 33 is provided with a tunnel cavity which is obliquely arranged relative to the mold opening direction, and both ends of the tunnel cavity are of an open structure. The loose core 4 is arranged in the tunnel cavity of the top block 33 and is in sliding fit with the top block 33, and an included angle between the relative movement direction of the loose core 4 and the top block 33 and the mold opening direction is an acute angle. The side wall of the core pulling 4 is in sliding fit with the inner wall of the tunnel cavity, one end of the core pulling 4 extends out of the ejector block 33 and is positioned in the injection molding cavity in the mode of die assembly of the front die 1 and the rear die 2, a back-off is formed in the injection molding cavity, and before a product piece is ejected, one end of the core pulling 4 needs to be withdrawn from the back-off.
The fixed block 5 is located the one end that the die cavity of loosing core 4 kept away from, and fixed link to each other can be dismantled with front mould 1 through the bolt to the fixed block 5, and one side that the fixed block 5 is close to articulates with the corresponding side of loosing core 4. The top of the fixing block 5 transversely extends to one side of the loose core 4 to form a hanging part 51, and a clamping groove formed by inwards sinking is formed in a position corresponding to the hanging part 51 on one side of the loose core 4. The hanging part 51 of the fixed block 5 stretches into the clamping groove of the core pulling 4, and the upper end surface of the hanging part 51 is in sliding fit with the inner wall of the clamping groove along the direction perpendicular to the mold opening direction. In the process of die opening or die closing, the fixed block 5 and the loose core 4 are always kept in a hanging state and are not separated.
The core pulling core 4 is provided with a through hole 41, and a pin rod 42 is arranged in the through hole 41. The axis of the pin rod 42 is perpendicular to the direction of the tunnel cavity, and two ends of the pin rod 42 extend out of the core pulling 4 and are fixedly connected with the top block 33. During the mold opening and closing process, the loose core 4 moves along the direction of the tunnel cavity relative to the top block 33, and the pin rod 42 has a limiting effect on the stroke of the loose core 4, so that the loose core 4 is prevented from being separated from the fixed block 5.
Two lug plates are symmetrically arranged on two sides of one end, close to the fixed block 5, of the core pulling 4, the two lug plates are located outside the tunnel cavity, and one side of each lug plate is connected with the stationary phase on the adjacent side of the core pulling 4 into a whole. Two spring installation cavities are symmetrically arranged on two sides of the tunnel cavity by the ejector blocks 33, and the extending direction of the spring installation cavities is consistent with that of the tunnel cavity. A spring is arranged in each spring mounting cavity, the main body part of the spring is positioned in the spring mounting cavity, and one end of the spring extends out of the outer side of the spring mounting cavity and is propped against the lug plate on the same side.
In the initial state of die opening, the top block 33 and the die 2 start to move together, the loose core 4 is fixedly connected with the fixed block 5 along the die opening direction, the loose core 4 moves along the vertical die opening direction relative to the fixed block 5 according to the decomposition of movement, and in the initial stage of movement, the spring applies an acting force along the tunnel cavity direction to the loose core 4, so that the loose core 4 and the top block 33 are ensured to move relatively along the tunnel cavity direction.
The needle plate driving mechanism 6 is provided outside the front mold 1 and the rear mold 2, and has one end connected to the needle plate 31 and the other end connected to the rear mold 2. The needle plate driving mechanisms 6 are arranged on two sides of the front die 1 symmetrically, and each needle plate driving mechanism 6 comprises at least one needle plate driving mechanism 6. The needle plate driving mechanism 6 comprises a draw hook 61, a stop block 62 and two guide blocks 63 positioned on two sides of the draw hook 61, one end of the draw hook 61 is hinged with the needle plate 31, and the other end of the draw hook is provided with a hook-shaped part bent to the inner side. The stop block 62 is arranged on the side wall of the rear mould 2, and the hook part at the other end of the draw hook 61 can be connected with the stop block 62 at the same side in a hanging way.
The guide blocks 63 are arranged on the side wall of the front mould 1, the opposite sides of the two guide blocks 63 are provided with guide grooves 631, two sides of the drag hook 61 are respectively provided with a roller 611, and the rollers 611 are positioned in the guide grooves 631 on the same side. The direction of the guide grooves 631 of the two guide blocks 63 positioned on the two sides of the drag hook 61 is consistent, the guide grooves 631 comprise two sections of straight grooves and one section of arc grooves, and the two ends of the arc grooves are respectively in smooth transition with the two sections of straight grooves. The two sections of linear grooves are parallel and staggered, and one section of linear groove close to the rear die 2 is far away from the side wall of the front die 1 relative to the other section of linear groove.
One side of the needle plate 31, which is close to the rear mold 2, is provided with a return bar, one end of which is fixedly connected with the needle plate 31, and the other end of which can be matched with the rear mold 2. During the mold closing process, the rear mold 2 is brought into contact with the other end of the return bar, and moves together with the needle plate 31, the ejector pins 32, and the ejector block 33 by the return bar.
The working principle of the invention is as follows: after the injection molding of the bicolor product piece is completed, the rear mold 2 and the front mold 1 are opened, the bicolor product piece is left in the rear mold 2, the rear mold 2 drives the needle plate 31 to move together through the draw hook 61, the needle plate 31, the ejector rod 32, the ejector block 33, the return rod, the bicolor product piece, the draw hook 61 and the roller 611 arranged on the draw hook 61 move synchronously, the core pulling 4 is unchanged relative to the front mold along the displacement of the mold opening direction under the action of the fixed block 5, the core pulling 4 moves relative to the front mold along the direction perpendicular to the mold opening direction, and after the ejector block 33 moves for a certain distance along the mold opening direction, the core pulling 4 exits the back-off relative to the ejector block 33.
The roller 611 moves synchronously with the corresponding drag hook 61, the guide blocks 63 at the two sides of the roller 611 are fixed at the side surface of the front die 1, and the roller 611 moves in the guide groove 631. When the roller 611 reaches the arc section of the guide groove 631, the core pulling 4 completely withdraws from the back-off relative to the ejector block 33, the roller 611 enters the arc section of the guide groove 631 to continue to move, each roller 611 drives the corresponding draw hook 61 to rotate outwards around the hinging position of the draw hook 61 and the needle plate 31, the hook-shaped part of each draw hook 61 is separated from the corresponding stop block 62, the needle plate 31, the ejector rod 32, the ejector block 33, the return rod and the draw hook 61 stop moving, the bicolor product piece and the rear mould 2 continue to move, and after the mould opening is completed, the ejector system in the rear mould 2 acts to eject the bicolor product piece.
After the bicolor product piece is ejected, the rear mould 2 and the front mould 1 are clamped, the rear mould 2 moves towards the front mould 1 under the drive of the injection molding machine, the return rod is firstly contacted with the rear mould 2, the rear mould 2 drives the ejector rod 32 of the needle plate 31, the ejector block 33 and the draw hook 61 to synchronously move through the return rod, the draw hook 61 rotates inwards around the hinging position of the draw hook 61 and the needle plate 31 under the action of the guide block 63, the hook-shaped part of the draw hook 61 is hung on the corresponding stop block 62, the ejector rod 32 of the needle plate 31, the ejector block 33 and the draw hook 61 move together with the rear mould 2, and the core pulling 4 moves relative to the front mould 1 along the direction perpendicular to the clamping under the action of the ejector block 33.
According to the invention, the needle plate driving mechanism is arranged in the front die to drive the loose core to exit the back-off, so that the damage to the bicolor product piece caused by direct ejection is avoided, the needle plate driving mechanism is simple in structure, the loose core is driven to exit the back-off by using the die opening movement, the steel consumption is saved, the cost and the process difficulty are reduced, the die opening and the loose core exit the back-off are synchronously performed, and the production efficiency is improved.
The parts not described in the invention can be realized by adopting or referring to the prior art.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (5)
1. The internal-drawing type double-color injection mold comprises a front mold, a rear mold, an ejection mechanism, a core pulling mechanism, a fixed block and a needle plate driving mechanism, and is characterized in that the ejection mechanism is arranged on the front mold side and comprises a needle plate, an ejector rod and an ejector block, and the ejector block is arranged in the front mold in an embedding manner;
the needle plate is positioned at one side of the ejector block away from the rear die, and the ejector block is fixedly connected with the needle plate through the ejector rod;
the core pulling device is arranged in the top block and is in sliding fit with the top block, and an included angle between the relative movement direction of the core pulling device and the top block and the mold opening direction is an acute angle;
The fixed block is positioned at one end of the loose core far away from the injection molding cavity, is detachably and fixedly connected with the front mold, and one side of the fixed block is connected with the loose core in a hanging manner;
The needle plate driving mechanism is arranged outside the front mould and the rear mould, one end of the needle bar is connected with the needle plate, the other end is connected with the rear mould;
The inside of the top block is provided with a tunnel cavity which is obliquely arranged relative to the mold opening direction, and both ends of the tunnel cavity are of an open structure;
the side wall of the loose core is in sliding fit with the inner wall of the tunnel cavity, and one end of the loose core extends out of the top block and is positioned in the injection molding cavity;
The top of the fixed block transversely extends to one side of the loose core to form a hanging part, and a clamping groove formed by inwards sinking is formed in a position corresponding to the hanging part on one side of the loose core;
The hanging part of the fixed block stretches into the clamping groove of the loose core, and the upper end surface of the hanging part is in sliding fit with the inner wall of the clamping groove along the direction perpendicular to the mold opening direction;
the core pulling device is provided with a perforation, a pin rod is arranged in the perforation;
The axis of the pin rod is perpendicular to the direction of the tunnel cavity, and two ends of the pin rod extend out of the core pulling outer side and are fixedly connected with the ejector block;
The needle plate driving mechanisms are provided with two groups and are symmetrically arranged at two sides of the front die, and each group of needle plate driving mechanism at least comprises one needle plate driving machine;
the needle plate driving mechanism comprises a draw hook, a stop block and two guide blocks positioned at two sides of the draw hook, one end of the draw hook is hinged with the needle plate, and the other end of the draw hook is provided with a hook-shaped part bent to the inner side;
The stop block is arranged on the side wall of the rear die, and the hook-shaped part at the other end of the draw hook can be hung with the stop block at the same side;
the guide blocks are arranged on the side wall of the front die, guide grooves are formed in one side, opposite to the two guide blocks, of the drag hook, two rollers are respectively arranged on two sides of the drag hook, and the rollers are positioned in the guide grooves on the same side;
The direction of the guide grooves of the two guide blocks positioned at the two sides of the drag hook is consistent, the guide grooves comprise two sections of straight grooves and one section of arc-shaped groove, and the two ends of the arc-shaped groove are respectively and smoothly transited with the two sections of straight grooves;
The two sections of linear grooves are parallel and staggered, and one section of linear groove close to the rear die is far away from the side wall of the front die relative to the other section of linear groove.
2. The internal drawing type double-color injection mold according to claim 1, wherein two ejector rods are respectively positioned at two sides of the ejector block, one end of each ejector rod is fixedly connected with the ejector block, and the other end of each ejector rod is fixedly connected with the needle plate.
3. The internal drawing type double-color injection mold according to claim 1, wherein two lug plates are symmetrically arranged on two sides of one end of the loose core, which is close to the fixed block;
Two spring mounting cavities are symmetrically formed in two sides of the tunnel cavity of the top block, and the extending direction of the spring mounting cavities is consistent with that of the tunnel cavity;
A spring is arranged in each spring mounting cavity, the main body part of the spring is positioned in the spring mounting cavity, and one end of the spring extends out of the outer side of the spring mounting cavity and is propped against the lug plate on the same side.
4. The internal drawing type double-color injection mold according to claim 1, wherein one side of the needle plate, which is close to the rear mold, is provided with a return bar, one end of the return bar is fixedly connected with the needle plate, and the other end of the return bar can be matched with the rear mold;
In the process of die assembly, the rear die is contacted with the other end of the return rod, and the needle plate is driven to move through the return rod.
5. The internal drawing type double-color injection mold according to claim 1, wherein the fixing block and the loose core are always kept in a hanging state in the mold opening or closing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388314.2A CN110919990B (en) | 2019-12-30 | 2019-12-30 | Internal-drawing type double-color injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388314.2A CN110919990B (en) | 2019-12-30 | 2019-12-30 | Internal-drawing type double-color injection mold |
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| Publication Number | Publication Date |
|---|---|
| CN110919990A CN110919990A (en) | 2020-03-27 |
| CN110919990B true CN110919990B (en) | 2024-09-10 |
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| CN201911388314.2A Active CN110919990B (en) | 2019-12-30 | 2019-12-30 | Internal-drawing type double-color injection mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112829187A (en) * | 2020-12-31 | 2021-05-25 | 青岛海泰科模具有限公司 | Compression double-shot injection mold in mould |
| CN113650227B (en) * | 2021-08-02 | 2023-02-07 | 均胜群英(天津)汽车饰件有限公司 | Double-color mold with movable elastic needle |
| CN114474628A (en) * | 2022-01-26 | 2022-05-13 | 青岛海泰科模具有限公司 | Mold opening and closing sequence control mechanism for injection mold |
| CN114714579B (en) * | 2022-02-28 | 2023-10-03 | 歌尔股份有限公司 | Front mould structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN211416120U (en) * | 2019-12-30 | 2020-09-04 | 青岛海泰科模具有限公司 | Internal-drawing type double-color injection mold |
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| US7381051B2 (en) * | 2006-01-24 | 2008-06-03 | Cheng Uei Precision Industry Co., Ltd. | Core-pulling mechanism and injection mold with the same |
| CN102189641B (en) * | 2010-03-19 | 2014-07-02 | 海尔集团公司 | Internal core pulling injection mold |
| CN203228373U (en) * | 2012-10-26 | 2013-10-09 | 鸿利达模具(深圳)有限公司 | Double-color mold core-pulling mechanism |
| CN203293482U (en) * | 2013-05-29 | 2013-11-20 | 广州导新模具注塑有限公司 | Bicolor mould with internal core-pulling mechanism |
| CN204749166U (en) * | 2015-07-21 | 2015-11-11 | 东江模具（深圳）有限公司 | Push up joint core pulling and demolding mechanism to one side |
| CN106863715B (en) * | 2017-03-10 | 2022-12-23 | 深圳市荣晖旺塑胶电子有限公司 | Double-color mold |
| CN109109273B (en) * | 2018-08-10 | 2020-09-22 | 星威国际家居股份有限公司 | Internal and external core-pulling type injection mold and internal core-pulling forming structure thereof |
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