CN111730820B - High-precision plastic injection mold - Google Patents
High-precision plastic injection mold Download PDFInfo
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- CN111730820B CN111730820B CN202010735458.7A CN202010735458A CN111730820B CN 111730820 B CN111730820 B CN 111730820B CN 202010735458 A CN202010735458 A CN 202010735458A CN 111730820 B CN111730820 B CN 111730820B
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- sliding
- clothes hanger
- shaped
- fixedly connected
- positioning
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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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
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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
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/735—Garment hangers
Abstract
The invention discloses a high-precision plastic injection mold in the technical field of injection molds, which comprises an injection mechanism and a positioning mechanism, wherein the positioning mechanism is arranged inside the injection mechanism, the injection mechanism comprises a movable mold and a fixed mold, the top of the fixed mold is provided with a cross-shaped assembling groove, the left side and the right side of the fixed mold are fixedly connected with L-shaped supporting plates, the two sides of the movable mold are rotatably connected with lifting screw rods, the top ends of the lifting screw rods penetrate through the L-shaped supporting plates and are rotatably connected with the L-shaped supporting plates, and the movable mold is jointly in threaded connection with the surfaces of the two lifting screw rods; according to the invention, the clothes hanger is subjected to injection molding in the film, and the frame of the clothes hanger is positioned in the middle of the clothes hanger mold cavity by arranging the positioning slide rod, the upper arc-shaped positioning block and the lower arc-shaped positioning block, so that the problem that the injection molding is influenced by the contact of the bottom of the clothes hanger and the clothes hanger mold cavity is avoided during injection molding, the injection molding material can completely wrap the frame of the clothes hanger, the injection molded clothes hanger is more uniform, and the qualification rate is greatly improved.
Description
Technical Field
The invention relates to the field of injection molds, in particular to a high-precision plastic injection mold.
Background
The in-mold decoration injection molding is a process for synchronously finishing the plastic injection molding and surface coating of a part, firstly, a pattern coated on the surface is formed on a plastic substrate, then the plastic substrate coated on the surface is fixed on a plastic suction mold, a three-dimensional thin shell is generated by heating, then the three-dimensional thin shell is fixed in a mold cavity of a fixed mold, a plastic material is injected into the mold after a movable mold and the fixed mold are closed, and the plastic material and the three-dimensional thin shell are fused into a whole to form a plastic part with the surface coating;
however, when the clothes hanger is subjected to in-mold decoration and injection molding at present, the internal framework of the clothes hanger is placed in the injection molding cavity, the bottom of the clothes hanger is in contact with the bottom of the inner side of the cavity, when the clothes hanger is subjected to injection molding in the cavity, the contact between the clothes hanger and the bottom of the cavity results in that some areas cannot be completely surrounded by injection molding materials, the injection molding materials wrap the periphery of the clothes hanger unevenly, and the injection molding qualification rate is reduced.
Based on the above, the invention designs a high-precision plastic injection mold to solve the above problems.
Disclosure of Invention
The invention aims to provide a high-precision plastic injection mold, which aims to solve the problems that when the clothes hanger is subjected to in-mold decoration injection molding in the prior art, the internal framework of the clothes hanger is placed in an injection cavity, the bottom of the clothes hanger is contacted with the bottom of the inner side of the cavity, when the injection molding is carried out in the cavity, the clothes hanger is contacted with the bottom of the cavity, so that some areas cannot be completely surrounded by injection molding materials, the periphery of the clothes hanger is not uniformly wrapped by the injection molding materials, and the injection molding qualification rate is reduced.
In order to achieve the purpose, the invention provides the following technical scheme: a high-precision plastic injection mold comprises an injection molding mechanism and a positioning mechanism, wherein the positioning mechanism is arranged inside the injection molding mechanism, the injection molding mechanism comprises a movable mold and a fixed mold, a cross-shaped assembly groove is formed in the top of the fixed mold, L-shaped support plates are fixedly connected to the left side and the right side of the fixed mold, lifting lead screws are rotatably connected to the two sides of the movable mold, the top ends of the lifting lead screws penetrate through the L-shaped support plates and are rotatably connected with the L-shaped support plates, the movable mold is in threaded connection with the surfaces of the two lifting lead screws, an injection molding opening and an exhaust hole are formed in the top of the movable mold, a first motor is fixedly connected to the top ends of the two lifting lead screws, the lower parts of the two lifting lead screws are worms and are meshed with turbines, the two turbines are arranged inside the side end of the cross-shaped assembly groove, rectangular grooves matched with the turbines are formed in the two sides of the bottom of the movable mold, the middle parts of the two turbines are fixedly connected with transmission screw rods, one ends of the two transmission screw rods are rotatably connected to the inner walls of two ends of a cross-shaped assembling groove, the other ends of the two transmission screw rods penetrate through the fixed die and are rotatably connected with the supporting plate, sliding blocks are respectively in threaded connection on the surfaces of the two transmission screw rods, the inner sides of the two sliding blocks are jointly and slidably connected with a drawing die in sliding fit with the inner wall of the cross-shaped assembling groove, T-shaped limiting sliding grooves for the sliding blocks to slide back and forth are formed in two sides of the drawing die, the T-shaped limiting sliding grooves are slidably connected with the sliding blocks, and a clothes hanger die cavity is formed in the top of the drawing die;
the positioning mechanism comprises three lower arc-shaped positioning blocks, the three lower arc-shaped positioning blocks are respectively and fixedly connected to the bottoms of a hook angle at the top end inside the clothes hanger die cavity and two hook angles at the left and right of the bottom end, lower arc-shaped clamping grooves are formed in the tops of the three lower arc-shaped positioning blocks, three upper arc-shaped positioning blocks are fixedly connected to the bottom of the movable die, upper arc-shaped clamping grooves are formed in the bottoms of the three upper arc-shaped positioning blocks, the upper arc-shaped positioning blocks are inserted into the clothes hanger die cavity to be matched with the lower arc-shaped positioning blocks, a plurality of positioning slide bars are slidably connected in the clothes hanger die cavity, the bottoms of the plurality of positioning slide bars penetrate through the drawing die and are fixedly connected with a rectangular sliding plate together, a guiding groove is formed in the top of each positioning slide bar, a first spring is sleeved on the top of each positioning slide bar, one end of the first spring is fixedly connected to the bottom of the drawing die, and the other end of the first spring is fixedly connected to the top of the rectangular sliding plate, the fixed die is characterized in that a rectangular sliding groove larger than a rectangular sliding plate is formed in the bottom of the fixed die, first channels for a positioning sliding rod and a first spring to slide through are formed in two sides of the bottom of the inner wall of the cross-shaped assembling groove, bent plates are connected to two sides of the fixed die in an up-and-down sliding mode, second springs are fixedly connected to the bottoms of the two bent plates, guide posts are fixedly connected to the bottoms of the two second springs, the back of each guide post is fixedly connected to the front side of the side end of the fixed die, third springs are fixedly connected to the inner sides of the bottoms of the two bent plates, the bottoms of the two third springs are fixedly connected to the bottom of the inner wall of the rectangular sliding groove in the fixed die, rectangular acting blocks matched with the bent plates are fixedly connected to two sides of the movable die, and the end portions of the inner side of the bent plates penetrate into the rectangular sliding groove and extend to openings of the first channels;
when the injection molding machine works, when the clothes hanger is subjected to in-mold decoration and injection molding at present, the internal framework of the clothes hanger is placed in the clothes hanger mold cavity, the bottom of the clothes hanger is contacted with the bottom of the inner side of the clothes hanger mold cavity, when the injection molding is carried out in the mold cavity, some areas cannot be completely surrounded by injection molding materials due to the contact of the clothes hanger and the bottom of the clothes hanger mold cavity, the periphery of the clothes hanger is not uniformly wrapped by the injection molding materials, the injection molding qualification rate is reduced, the internal framework of the clothes hanger is placed in the clothes hanger mold cavity, the framework of the clothes hanger is pre-positioned by the guide groove at the top of the positioning slide rod, the first motor is started, the first motor rotates to drive the left lifting screw rod and the right lifting screw rod to rotate, so that the movable mold is downwards closed under the action of the lifting screw rods, the bottom of the lifting screw rods is provided with worms matched with turbines, the lifting screw rods rotate to drive the turbines to rotate, the middle parts of the turbines are fixedly connected with transmission screw rods to drive the transmission screw rods to rotate, the transmission screw rod rotates to drive the sliding block to move inwards, the sliding block is connected with the drawing die in a sliding mode, the sliding block moves backwards for a certain distance, when the sliding block is in contact with the rear end of the T-shaped limiting sliding groove, the drawing die is driven to move backwards together to carry out die assembly, when the drawing die moves backwards, the rectangular sliding plate enters the sliding groove to drive the positioning sliding rod to move downwards, the positioning sliding rod is located at the middle position of the clothes hanger die cavity, so that the inner frame of the clothes hanger is located at the middle part of the clothes hanger die cavity, at the moment, hook corners at three positions of the clothes hanger enter the lower arc-shaped positioning block, the clothes hanger is flatly positioned at the middle part of the clothes hanger die cavity, the drawing die continues to move backwards, the movable die moves downwards to drive the rectangular action block to move downwards together, when the rectangular action block touches the top of the bending plate, the rectangular sliding plate enters the bottom of the fixed die and the rectangular sliding groove, and the rectangular action block pushes the bending plate downwards to move, the rectangular sliding plate is driven to move backwards and downwards simultaneously by the action of the rectangular sliding plate on the top of the bending plate, the downward movement of the rectangular sliding plate drives the positioning slide rod to move downwards, at the moment, the upper arc-shaped positioning block at the bottom of the movable die moves downwards to be clamped with the lower arc-shaped positioning block to position the clothes hanger in the middle of the clothes hanger die cavity, when the die is completely closed, the positioning slide rod is lowered to the lowest position to be matched with the clothes hanger die cavity to form an injection molding cavity, the upper arc-shaped positioning block and the lower arc-shaped positioning block clamp the frame of the clothes hanger, then injection molding is carried out from an injection molding opening, after the injection molding and cooling are finished, the movable die is opened upwards by reversing of the first motor, the transmission screw rod drives the sliding block to move outwards by reversing, the sliding block moves from the rear end of the T-shaped limiting sliding chute to the outer end and then acts on the drawing die to drive the outwards, during the period, the upward movement of the rectangular action block is not acted on the bending plate, and the bending plate returns to the initial position under the action of the second spring and the third spring, the board of bending is not acting on the rectangle slide, the rectangle slide gets back to in the spout under first spring action, make its reaction can arrive initial position, accomplish and mould plastics, thereby realize making the clothes hanger that dries in the air when carrying out the interior decoration of mould and moulding plastics, the back is accomplished to the upper part, the automatic frame location that will dry in the air the clothes hanger is at clothes hanger die cavity middle part of accomplishing, make when moulding plastics, the clothes hanger bottom of drying in the air can not influence with the clothes hanger die cavity and mould plastics, make the frame that the injection molding material can wrap up the clothes hanger that dries in the air completely, the clothes hanger that dries in the air of moulding plastics is more even, the qualification rate improves greatly.
As a further scheme of the invention, a guide block is fixedly connected to the middle part of the front side of the fixed die, a T-shaped sliding groove is formed in the top surface of the guide block, a jacking sliding block is connected to the inner wall of the T-shaped sliding groove in a sliding manner, a rectangular stop block is fixedly connected to the bottom of the rectangular sliding plate and matched with the jacking sliding block, a second channel through which a positioning sliding rod, a first spring and the rectangular stop block on the same side can pass is formed in the middle position of the bottom of the inner wall of the cross-shaped assembling groove, right-angle guide blocks are connected to the left right-angle corner of a clothes hanger die cavity in a sliding manner, two rectangular guide blocks are connected to the hook corner of the clothes hanger die cavity in a sliding manner, L-shaped connecting blocks are fixedly connected to the bottoms of the two right-angle guide blocks and the rectangular guide blocks, and the bottom end of each L-shaped connecting block is fixedly connected to the positioning sliding rod; when the injection molding of the clothes hanger is finished, the clothes hanger which is subjected to internal injection molding needs to be taken out, after the injection molding and cooling are finished, the movable mold moves upwards, the drawing mold moves outwards and returns to the initial position, the rectangular stop block acts on the jacking sliding block to drive the jacking sliding block to slide on the guide block, the guide block acts on the jacking sliding block to enable the rectangular sliding plate to move upwards, the rectangular sliding plate moves upwards to drive the positioning sliding rod to push the injection molded clothes hanger out of the clothes hanger mold cavity, and when the positioning sliding rod moves upwards, the L-shaped connecting block drives the right-angle guide block and the rectangular guide block to move upwards together to limit the pushed clothes hanger and guide subsequent upper parts, so that the injection molded clothes hanger is pushed out by the positioning sliding rod when the drawing mold returns to the original position after the injection molding is finished, and the clothes hanger mold cavity is separated from the clothes hanger, and the right-angle guide block and the rectangular guide block for jacking the clothes hanger are used for limiting the clothes hanger, so that subsequent loading is facilitated.
As a further scheme of the invention, a first slide bar which is obliquely arranged is fixedly connected to the inner wall of the T-shaped sliding chute, the first slide bar penetrates through the jacking sliding block and is in sliding connection with the jacking sliding block, a fourth spring is sleeved on the first slide bar, one end of the fourth spring is fixedly connected to the front face of the jacking sliding block, and the other end of the fourth spring is fixedly connected to the inner wall of the T-shaped sliding chute; the during operation, because through T type spout sliding connection in jacking sliding block and the guide block, when jacking sliding block breaks away from with the rectangle slide, if there is external force and human factor influence, the initial position that can lead to jacking sliding block changes, make follow-up and rectangle slide go wrong when the cooperation, through the first slide bar of fixed connection in T type spout, jacking sliding block breaks away from the back with the rectangle slide, fourth spring extrusion jacking sliding block bottom, make it be in the initial position all the time, thereby realize can fixing a position at the initial position after jacking sliding block breaks away from with the rectangle slide at every turn, make it not influence next cooperation with the rectangle slide.
As a further scheme of the invention, the left side and the right side of the bottom of the movable mold are fixedly connected with positioning pins, the top of the fixed mold is provided with a positioning groove matched with the positioning pins, and the top of the positioning groove is provided with a guiding cambered surface; during operation, because the movable mould and the fixed mould need to be opened and closed, and need aim at the position of moulding plastics completely when the closure, through at movable mould bottom both sides fixedly connected with locating pin, the fixed mould bottom is seted up with locating pin complex constant head tank, when the movable mould downstream closure, the locating pin inserts in the constant head tank completely under the arcwall face guide of constant head tank to the realization enables movable mould and fixed mould and aims at completely when movable mould and fixed mould are closed.
As a further scheme of the invention, a first rectangular sliding block is fixedly connected to the bottom of the drawing die, a third channel in sliding fit with the first rectangular sliding block is formed in the bottom of the fixed die, mounting grooves are formed in both sides of the first rectangular sliding block, rollers distributed at equal intervals are rotatably connected in the mounting grooves, and the rollers are in contact with the inner wall of the third channel; when the drawing die works, the drawing die is in sliding connection with the fixed die, the first rectangular sliding block is seriously abraded after being acted with the third channel for multiple times, so that the positioning deviation of the drawing die and the fixed die is caused, and the production of injection molding parts is influenced.
As a further scheme of the invention, the bottom of the inner wall of the rectangular sliding chute is rotationally connected with a plurality of guide rollers which are distributed at equal intervals, and the guide roller at the foremost side is lower than the guide roller at the rear side; during operation, because the rectangle dog is when getting into the first passageway of rectangle, the effect of rectangle dog and the first passageway inner wall of rectangle can lead to the fact wearing and tearing to the rectangle dog after the manifold action, influences rectangle dog and jacking sliding block and effect, through set up the guide roll at rectangle spout top, the guide roll guides when getting into the rectangle spout to the rectangle dog, and rectangle dog and guide roll are rolling connection, reduce the wearing and tearing of rectangle dog, increase its working life.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the injection molding device, the clothes hanger is subjected to injection molding in the mold, and the frame of the clothes hanger is positioned in the middle of the mold cavity of the clothes hanger through the positioning slide rod, the upper arc-shaped positioning block and the lower arc-shaped positioning block, so that the problem that the injection molding is influenced due to the fact that the bottom of the clothes hanger is in contact with the mold cavity of the clothes hanger during injection molding is solved, the frame of the clothes hanger can be completely wrapped by injection molding materials, the injection molded clothes hanger is more uniform, and the qualification rate is greatly improved.
2. According to the invention, the drawing die moves outwards to return to the initial position, the positioning slide rod is driven to move upwards, and the injection-molded clothes hanger is ejected out of the clothes hanger die cavity, so that after injection molding is finished, when the drawing die returns to the original position, the injection-molded clothes hanger is ejected out by the positioning slide rod, the clothes hanger is separated from the clothes hanger die cavity, and then the clothes hanger is limited by the right-angle guide block and the rectangular guide block which are ejected out, so that subsequent loading is facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a first perspective view of the present invention;
FIG. 2 is a second perspective view of the present invention;
FIG. 3 is a third perspective view of the present invention (hidden drawing die);
FIG. 4 is a cross-sectional view of the structure of FIG. 3 at A in accordance with the present invention;
FIG. 5 is a view of the internal structure of a mold cavity of the garment hanger of the present invention;
FIG. 6 is a cross-sectional view of the bend plate and a third spring structure of the present invention;
FIG. 7 is a cross-sectional view of the T-shaped limiting chute and right angle guide block of the present invention;
fig. 8 is a cross-sectional view of the lift screw and worm engagement mechanism of the present invention (hidden drawing die).
In the drawings, the components represented by the respective reference numerals are listed below:
a movable die 1, a fixed die 2, a cross-shaped assembly groove 201, a rectangular sliding groove 202, an L-shaped support plate 3, a lifting screw rod 4, an injection molding opening 5, an exhaust hole 6, a first motor 7, a turbine 8, a rectangular groove 9, a transmission screw rod 10, a support plate 11, a sliding block 12, a drawing die 13, a T-shaped limiting sliding groove 14, a clothes hanger die cavity 15, a lower arc-shaped positioning block 16, an upper arc-shaped positioning block 17, a positioning sliding rod 18, a rectangular sliding plate 19 and a first spring 20, the device comprises a first channel 21, a bending plate 22, a second spring 23, a guide post 24, a third spring 25, a rectangular action block 26, a guide block 27, a T-shaped sliding groove 28, a jacking sliding block 29, a rectangular stop block 30, a right-angle guide block 31, a rectangular guide block 32, an L-shaped connecting block 33, a first sliding rod 34, a fourth spring 35, a positioning pin 36, a positioning groove 37, a roller 38, a guide roller 39, a first rectangular sliding block 40, a third channel 41 and a second channel 42.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, the present invention provides a technical solution: a high-precision plastic injection mold, a positioning mechanism is arranged inside an injection mechanism, the injection mechanism comprises a movable mold 1 and a fixed mold 2, the top of the fixed mold 2 is provided with a cross-shaped assembly groove 201, the inner wall of the cross-shaped assembly groove 201 is connected with a drawing mold 13 in a sliding way, the left side and the right side of the fixed mold 2 are both fixedly connected with L-shaped support plates 3, the two sides of the movable mold 1 are both rotatably connected with lifting lead screws 4, the top ends of the lifting lead screws 4 penetrate through the L-shaped support plates 3 and are rotatably connected with the same, the movable mold 1 is jointly screwed on the surfaces of the two lifting lead screws 4, the top of the movable mold 1 is provided with an injection opening 5 and an exhaust hole 6, the top ends of the two lifting lead screws 4 are both fixedly connected with a first motor 7, the lower parts of the two lifting lead screws 4 are both worm screws and are engaged with worm wheels 8, the two worm wheels 8 are both arranged inside the side ends of the cross-shaped assembly groove 201, the two sides of the bottom of the movable mold 1 are both provided with rectangular grooves 9 matched with the worm wheels 8, the middle parts of the two turbines 8 are fixedly connected with transmission screw rods 10, one ends of the two transmission screw rods 10 are rotatably connected to the inner walls of the two ends of the cross-shaped assembling groove 201, the other ends of the two transmission screw rods 10 are rotatably connected with a supporting plate 11, sliding blocks 12 are respectively in threaded connection on the surfaces of the two transmission screw rods 10, the inner sides of the two sliding blocks 12 are jointly and slidably connected with a drawing die 13 in sliding fit with the inner wall of the cross-shaped assembling groove 201, T-shaped limiting sliding grooves 14 for the sliding blocks 12 to slide back and forth are formed in the two sides of the drawing die 13, the T-shaped limiting sliding grooves 14 are slidably connected with the sliding blocks 12, and a clothes hanger die cavity 15 is formed in the top of the drawing die 13;
the positioning mechanism comprises three lower arc-shaped positioning blocks 16, the three lower arc-shaped positioning blocks 16 are respectively and fixedly connected with the top hook corner inside the clothes hanger die cavity 15 and the bottoms of the left hook corner and the right hook corner at the bottom end, the tops of the three lower arc-shaped positioning blocks 16 are all provided with lower arc-shaped clamping grooves, the bottom of the movable die 1 is fixedly connected with three upper arc-shaped positioning blocks 17, the bottoms of the three upper arc-shaped positioning blocks 17 are all provided with upper arc-shaped clamping grooves, the upper arc-shaped positioning blocks 17 are inserted into the clothes hanger die cavity 15 to be matched with the lower arc-shaped positioning blocks 16, the clothes hanger die cavity 15 is internally and slidably connected with a plurality of positioning slide bars 18, the bottom ends of the plurality of positioning slide bars 18 penetrate through the drawing die 13 and are jointly and fixedly connected with a rectangular sliding plate 19, the top of each positioning slide bar 18 is provided with a guide groove, the first spring 20 is sleeved on each positioning slide bar, one end of the first spring 20 is fixedly connected with the bottom of the drawing die 13, and the other end is fixedly connected with the top of the rectangular sliding plate 19, the bottom of the fixed die 2 is provided with a rectangular sliding chute 202 larger than the rectangular sliding plate 19, two sides of the bottom of the inner wall of the cross-shaped assembly groove 201 are respectively provided with a first channel 21 for the positioning sliding rod 18 and the first spring 20 to slide through, two sides of the fixed die 2 are respectively connected with a bending plate 22 in a vertical sliding manner, the bottoms of the two bending plates 22 are respectively fixedly connected with a second spring 23, the bottoms of the two second springs 23 are respectively fixedly connected with a guide post 24, the back of the guide post 24 is fixedly connected with the front side of the side end of the fixed die 2, the inner sides of the bottoms of the two bending plates 22 are respectively fixedly connected with a third spring 25, the bottoms of the two third springs 25 are respectively fixedly connected with the bottom of the inner wall of the rectangular sliding chute 202 in the fixed die 2, two sides of the movable die 1 are respectively fixedly connected with a rectangular action block 26 matched with the bending plates 22, and the end part of the inner side of the bending plate 22 penetrates into the rectangular sliding chute 202 and extends to the opening of the first channel 21;
when the injection molding machine works, when the clothes hanger is subjected to in-mold decoration and injection molding at present, the internal framework of the clothes hanger is placed in the clothes hanger mold cavity 15, the bottom of the clothes hanger is contacted with the bottom of the inner side of the clothes hanger mold cavity 15, when the injection molding is carried out in the mold cavity, the clothes hanger is contacted with the bottom of the clothes hanger mold cavity 15, so that some areas can not be completely surrounded by injection molding materials, the periphery of the clothes hanger is not uniformly wrapped by the injection molding materials, the injection molding qualification rate is reduced, the internal framework of the clothes hanger is placed in the clothes hanger mold cavity 15, the framework of the clothes hanger is pre-positioned by the guide groove at the top of the positioning slide rod 18, the first motor 7 is started, the first motor 7 rotates to drive the left lifting screw rod and the right lifting screw rod 4 to rotate, so that the movable mold 1 is downwards closed under the action of the lifting screw rods 4, the bottom of the lifting screw rods 4 is provided with worms and matched with the turbines 8, the lifting screw rods 4 rotate to drive the turbines 8, the transmission screw rods 10 are fixedly connected to the middle parts of the turbines 8, thereby driving the transmission screw rod 10 to rotate, the transmission screw rod 10 rotates to drive the sliding block 12 to move inwards, the sliding block 12 is connected with the drawing die 13 in a sliding way, the sliding block 12 moves backwards for a certain distance, when the sliding block 12 contacts with the rear end of the T-shaped limiting chute 14, the drawing die 13 is driven to move backwards together to carry out die assembly, when the drawing die 13 moves backwards, the rectangular sliding plate 19 enters the first channel 21 to drive the positioning sliding rod 18 to move downwards, the positioning sliding rod 18 is positioned at the middle position of the clothes rack die cavity 15, so that the internal frame of the clothes rack is positioned at the middle part of the clothes rack die cavity 15, at the moment, hook angles at three positions of the clothes rack enter the lower arc-shaped positioning block 16 to position the clothes rack flatly at the middle part of the clothes rack die cavity 15, the drawing die 13 continues to move backwards, the movable die 1 moves downwards to drive the rectangular action block 26 to move downwards together, when the rectangular action block 26 touches the top of the bending plate 22, the rectangular sliding plate 19 enters the bottom of the fixed die and the rectangular sliding groove 202, the rectangular action block 26 pushes the bending plate 22 downwards to move downwards, the rectangular sliding plate 19 is acted on the top of the bending plate 22 to move backwards and simultaneously move downwards, the rectangular sliding plate 19 moves downwards to drive the positioning slide rod 18 to move downwards, at the moment, the upper arc-shaped positioning block 17 at the bottom of the movable die 1 moves downwards to be clamped with the lower arc-shaped positioning block 16 to position the clothes hanger in the middle of the clothes hanger die cavity 15, when the die is completely closed, the positioning slide rod 18 descends to the lowest position to be matched with the clothes hanger die cavity 15 to form an injection molding cavity, the upper arc-shaped positioning block 17 and the lower arc-shaped positioning block 16 clamp the frame, then the injection molding is carried out from the clothes hanger opening 5, after the injection molding and the cooling are completed, the first motor 7 rotates reversely to open the movable die 1 upwards, the transmission screw rod 10 rotates reversely to drive the sliding block 12 to move outwards, the sliding block 12 moves from the rear end of the T-shaped limiting sliding groove 14 to the outer end, and then acting on the drawing die 13, driving the drawing die 13 to the outside, during the period, the rectangular acting block 26 moves upwards and does not act on the bending plate 22, the bending plate 22 returns to the initial position under the action of the second spring 23 and the third spring 25, the bending plate 22 does not act on the rectangular sliding plate 19, the rectangular sliding plate 19 returns to the first channel 21 under the action of the first spring 20, so that the rectangular sliding plate reacts to the initial position, and injection molding is completed, so that when the clothes hanger is used for in-die decoration and injection molding, after the loading is completed, the frame of the clothes hanger is automatically positioned in the middle of the clothes hanger die cavity 15, and when injection molding, the problem that the injection molding is influenced by the contact of the bottom of the clothes hanger and the clothes hanger die cavity 15 is avoided, the injection molding material can completely wrap the frame of the clothes hanger, the injection molded clothes hanger is more uniform, and the qualification rate is greatly improved.
As a further proposal of the invention, the middle part of the front side of the fixed die 2 is fixedly connected with a guide block 27, the top surface of the guide block 27 is provided with a T-shaped chute 28, the inner wall of the T-shaped chute 28 is connected with a jacking sliding block 29 in a sliding way, the bottom of the rectangular sliding plate 19 is fixedly connected with a rectangular stop block 30, the rectangular stop block 30 is matched with the jacking sliding block 29, the middle position of the bottom of the inner wall of the cross-shaped assembly groove 201 is provided with a second channel 42 for the positioning sliding rod 18, the first spring 20 and the rectangular stop block 30 at the same side to pass through, the left right angle corners of the clothes hanger die cavity 15 are both connected with right angle guide blocks 31 in a sliding way, two rectangular guide blocks 32 are connected to the hook corners of the clothes hanger die cavity 15 in a sliding mode, the bottoms of the two right-angle guide blocks 31 and the rectangular guide blocks 32 are fixedly connected with L-shaped connecting blocks 33, and the bottom ends of the L-shaped connecting blocks 33 are fixedly connected to the positioning slide rods 18; when the injection molding of the clothes hanger is finished, the clothes hanger which is subjected to internal injection molding needs to be taken out, after the injection molding and cooling are finished, the movable mold 1 moves upwards, the drawing mold 13 moves outwards and returns to the initial position, the jacking sliding block 29 is driven by the rectangular stop block 30 to slide on the guide block 27, the jacking sliding block 29 is driven by the guide block 27 to move upwards, the rectangular sliding plate 19 moves upwards, the positioning sliding rod 18 is driven to move upwards, the clothes hanger which is subjected to injection molding is ejected out of the clothes hanger mold cavity 15, the right-angle guide block 31 and the rectangular guide block 32 are driven by the L-shaped connecting block 33 to move upwards together when the positioning sliding rod 18 moves upwards, the ejected clothes hanger is limited, the subsequent upper piece is guided, and the clothes hanger which is subjected to injection molding is ejected out by the positioning sliding rod 18 when the drawing mold 13 returns after the injection molding is finished, the clothes hanger is separated from the clothes hanger die cavity 15, and the clothes hanger is limited by the right-angle guide block 31 and the rectangular guide block 32 which lift the clothes hanger, so that subsequent loading is facilitated.
As a further scheme of the present invention, a first slide bar 34 arranged obliquely is fixedly connected to an inner wall of the T-shaped chute 28, the first slide bar 34 penetrates through the jacking slide block 29 and is connected with the jacking slide block in a sliding manner, a fourth spring 35 is sleeved on the first slide bar 34, one end of the fourth spring 35 is fixedly connected to the front surface of the jacking slide block 29, and the other end of the fourth spring 35 is fixedly connected to the inner wall of the T-shaped chute 28; in operation, because jacking sliding block 29 and interior through T type spout 28 sliding connection of guide block 27, when jacking sliding block 29 breaks away from with rectangle slide 19, if there is external force and human factor influence, can lead to jacking sliding block 29's initial position to change, make follow-up and rectangle slide 19 cooperation go wrong, through first slide bar 34 of fixed connection in T type spout 28, jacking sliding block 29 breaks away from the back with rectangle slide 19, fourth spring 35 extrudees jacking sliding block 29 bottom, make it be in the initial position all the time, thereby realize can fixing a position at the initial position after breaking away from with rectangle slide 19 with jacking sliding block 29 at every turn, make it not influence next cooperation with rectangle slide 19.
As a further scheme of the invention, the left side and the right side of the bottom of the movable mold 1 are fixedly connected with positioning pins 36, the top of the fixed mold 2 is provided with positioning grooves 37 matched with the positioning pins 36, and the top of the positioning grooves 37 is provided with guide arc surfaces; during operation, because movable mould 1 and cover half 2 need open and shut, and need aim at the position of moulding plastics completely when the closure, through at movable mould 1 bottom both sides fixedly connected with locating pin 36, cover half 2 bottom is seted up with locating pin 36 complex constant head tank 37, when movable mould 1 downstream closed, locating pin 36 inserts in the constant head tank 37 completely under the arcwall face guide of constant head tank 37 to the realization is when movable mould 1 and cover half 2 are closed, can make movable mould 1 and cover half 2 aim at completely.
As a further scheme of the invention, the bottom of the drawing die 13 is fixedly connected with a first rectangular sliding block 40, the bottom of the fixed die is provided with a third channel 41 in sliding fit with the first rectangular sliding block 40, two sides of the first rectangular sliding block 40 are provided with mounting grooves, rollers 38 which are distributed at equal intervals are rotatably connected in the mounting grooves, and the rollers 38 are in contact with the inner wall of the third channel 41; during operation, as the drawing die 13 is in sliding connection with the fixed die 2, after the first rectangular sliding block 40 and the third channel 41 act for multiple times, the abrasion is serious, so that the positioning of the drawing die 13 and the fixed die 2 is deviated, and the production of injection molding parts is influenced.
As a further scheme of the invention, the bottom of the inner wall of the rectangular chute 202 is rotatably connected with a plurality of guide rollers 39 which are distributed at equal intervals, and the foremost guide roller 39 is lower than the back guide roller 39; in operation, because rectangle dog 30 is when getting into rectangle first passageway 21, rectangle dog 30 and the effect of rectangle first passageway 21 inner wall, after the manifold action, can cause wearing and tearing to rectangle dog 30, influence rectangle dog 30 and jacking sliding block 29 and effect, through set up guide roll 39 in rectangle spout 202 inner wall bottom, guide roll 39 guides when getting into rectangle first passageway 21 to rectangle dog 30, and rectangle dog 30 is roll connection with guide roll 39, reduce the wearing and tearing of rectangle dog 30, increase its working life.
The working principle is as follows: the frame inside the clothes hanger is placed in a clothes hanger die cavity 15, the frame of the clothes hanger is pre-positioned by a guide groove at the top of a positioning slide rod 18, a first motor 7 is started, the first motor 7 rotates to drive a left lifting screw rod and a right lifting screw rod 4 to rotate, so that a movable die 1 is downwards matched under the action of the lifting screw rods 4, the bottoms of the lifting screw rods 4 are worms and are matched with turbines 8, the lifting screw rods 4 rotate to drive the turbines 8 to rotate, the middle parts of the turbines 8 are fixedly connected with transmission screw rods 10, so as to drive the transmission screw rods 10 to rotate, the transmission screw rods 10 rotate to drive sliding blocks 12 to move inwards, the sliding blocks 12 are in sliding connection with drawing dies 13, the sliding blocks 12 move backwards by a distance first, when the sliding blocks 12 are in contact with the rear ends of T-shaped limiting chutes 14, the drawing dies 13 are driven to move backwards together to be matched, when the drawing dies 13 move backwards, the rectangular sliding plate 19 enters the first channel 21 to drive the positioning sliding rod 18 to move downwards, so that the positioning sliding rod 18 is located at the middle position of the clothes hanger die cavity 15, the inner frame of the clothes hanger is located at the middle of the clothes hanger die cavity 15, at the moment, hook corners at three positions of the clothes hanger enter the lower arc-shaped positioning blocks 16, the clothes hanger is flatly positioned at the middle of the clothes hanger die cavity 15, the drawing die 13 continues to move backwards, the movable die 1 moves downwards to drive the rectangular action block 26 to move downwards together, when the rectangular action block 26 touches the top of the bending plate 22, the rectangular sliding plate 19 enters the bottom of the fixed die and the rectangular first channel 21, the rectangular action block 26 pushes the bending plate 22 downwards, the rectangular sliding plate 19 acts on the top of the bending plate 22 to move backwards and downwards simultaneously, the rectangular sliding plate 19 moves downwards to drive the positioning sliding rod 18 to move downwards, at the moment, the upper arc-shaped positioning block 17 at the bottom of the movable die 1 moves downwards and is clamped with the lower arc-shaped positioning blocks 16 to position the clothes hanger in the clothes hanger die In the middle of the cavity 15, when the mold is completely closed, the positioning slide rod 18 is lowered to the lowest position to be matched with the clothes hanger mold cavity 15 to form an injection molding cavity, the upper arc-shaped positioning block 17 and the lower arc-shaped positioning block 16 clamp the frame of the clothes hanger, then injection molding is carried out from the injection molding opening 5, after the injection molding and cooling are finished, the first motor 7 rotates reversely to open the movable mold 1 upwards, the transmission screw rod 10 rotates reversely to drive the sliding block 12 to move outwards, the sliding block 12 moves from the rear end to the outer end of the T-shaped limiting sliding groove 14 firstly, then the drawing mold 13 is acted to drive the drawing mold 13 outwards, during the period, the rectangular action block 26 moves upwards and does not act on the bending plate 22, the bending plate 22 returns to the initial position under the action of the second spring 23 and the third spring 25, the bending plate 22 does not act on the rectangular sliding plate 19, and the rectangular sliding plate 19 returns to the first channel 21 under the action of the first spring 20, so that the rectangular sliding plate reacts to the initial position to finish the injection molding.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The utility model provides a high-accuracy plastic injection mold, includes injection moulding mechanism and positioning mechanism, its characterized in that: the positioning mechanism is arranged inside the injection molding mechanism, the injection molding mechanism comprises a movable mold (1) and a fixed mold (2), a cross assembly groove (201) is formed in the top of the fixed mold (2), L-shaped supporting plates (3) are fixedly connected to the left side and the right side of the fixed mold (2), lifting screws (4) are rotatably connected to the two sides of the movable mold (1), the top ends of the lifting screws (4) penetrate through the L-shaped supporting plates (3) and are rotatably connected with the lifting screws, the movable mold (1) is in threaded connection with the surfaces of the two lifting screws (4) together, an injection port (5) and an exhaust hole (6) are formed in the top of the movable mold (1), two first motors (7) are fixedly connected to the top ends of the lifting screws (4), two lower parts of the lifting screws (4) are worms, turbines (8) are meshed with each other, and the turbines (8) are arranged inside the cross assembly groove (201) side, the two sides of the bottom of the movable mold (1) are provided with rectangular grooves (9) matched with the turbines (8), the middle parts of the turbines (8) are fixedly connected with transmission screw rods (10), one ends of the transmission screw rods (10) are rotatably connected to the inner walls at the two ends of the cross-shaped assembly groove (201), the other ends of the transmission screw rods penetrate out of the fixed mold (2) and are rotatably connected with a supporting plate (11), the surfaces of the transmission screw rods (10) are respectively and spirally connected with sliding blocks (12), the inner sides of the sliding blocks (12) are jointly and slidably connected with drawing molds (13) in sliding fit with the inner walls of the cross-shaped assembly groove (201), both sides of the drawing die (13) are provided with T-shaped limiting sliding chutes (14) for the sliding block (12) to slide back and forth, the T-shaped limiting sliding groove (14) is connected with the sliding block (12) in a sliding mode, and a clothes hanger die cavity (15) is formed in the top of the drawing die (13);
the positioning mechanism comprises three lower arc-shaped positioning blocks (16), the three lower arc-shaped positioning blocks (16) are respectively and fixedly connected to the top end hook angle in the clothes hanger die cavity (15) and the bottoms of the left hook angle and the right hook angle at the bottom end, lower arc-shaped clamping grooves are formed in the tops of the three lower arc-shaped positioning blocks (16), three upper arc-shaped positioning blocks (17) are fixedly connected to the bottom of the movable die (1), upper arc-shaped clamping grooves are formed in the bottoms of the three upper arc-shaped positioning blocks (17), the upper arc-shaped positioning blocks (17) are inserted into the clothes hanger die cavity (15) to be matched with the lower arc-shaped positioning blocks (16), a plurality of positioning slide bars (18) are slidably connected in the clothes hanger die cavity (15), the bottoms of the plurality of positioning slide bars (18) penetrate through the drawing die (13) and are jointly and fixedly connected with rectangular slide plates (19), and a guide groove is formed in the top of each positioning slide bar (18), and all the springs are sleeved with first springs (20), one end of each first spring (20) is fixedly connected to the bottom of the drawing die (13), the other end of each first spring is fixedly connected to the top of a rectangular sliding plate (19), rectangular sliding grooves (202) larger than the rectangular sliding plates (19) are formed in the bottom of the fixed die (2), first channels (21) for the positioning sliding rods (18) and the first springs (20) to slide through are formed in the two sides of the inner wall of the cross-shaped assembly groove (201), bending plates (22) are vertically and slidably connected to the two sides of the fixed die (2), second springs (23) are fixedly connected to the bottoms of the bending plates (22), guide columns (24) are fixedly connected to the bottoms of the second springs (23), the back surfaces of the guide columns (24) are fixedly connected to the front sides of the side ends of the fixed die (2), and third springs (25) are fixedly connected to the inner sides of the bottoms of the bending plates (22), two equal fixed connection in third spring (25) bottom is in the bottom of the inside rectangle spout (202) inner wall of cover half (2), the equal fixedly connected with in movable mould (1) both sides and the rectangle effect piece (26) of board (22) complex of bending, board (22) the medial extremity of bending penetrates inside rectangle spout (202) and extends to first passageway (21) opening part.
2. The high precision plastic injection mold according to claim 1, wherein: the middle part of the front side of the fixed die (2) is fixedly connected with a guide block (27), the top surface of the guide block (27) is provided with a T-shaped sliding groove (28), the inner wall of the T-shaped sliding groove (28) is connected with a jacking sliding block (29) in a sliding manner, the bottom of the rectangular sliding plate (19) is fixedly connected with a rectangular stop block (30), the rectangular stop block (30) is matched with the jacking sliding block (29), the middle position of the bottom of the inner wall of the cross-shaped assembly groove (201) is provided with a second channel (42) for the positioning sliding rod (18), the first spring (20) and the rectangular stop block (30) at the same side to pass through, the left right angle corner of the clothes hanger die cavity (15) is respectively connected with a right angle guide block (31) in a sliding manner, and the hook corner of the clothes hanger die cavity (15) is connected with two rectangular guide blocks (32) in a sliding manner, and the bottoms of the right angle guide blocks (31) and the rectangular guide blocks (32) are respectively fixedly connected with an L-shaped connecting block (33), the bottom end of the L-shaped connecting block (33) is fixedly connected to the positioning sliding rod (18).
3. The high precision plastic injection mold of claim 2, wherein: fixedly connected with slope first slide bar (34) of arranging on the inner wall of T type spout (28), first slide bar (34) run through jacking sliding block (29) and rather than sliding connection, the cover is equipped with fourth spring (35) on first slide bar (34), fourth spring (35) one end fixed connection is positive at jacking sliding block (29), and other end fixed connection is on T type spout (28) inner wall.
4. The high precision plastic injection mold according to claim 1, wherein: the fixed die is characterized in that positioning pins (36) are fixedly connected to the left side and the right side of the bottom of the movable die (1), positioning grooves (37) matched with the positioning pins (36) are formed in the top of the fixed die (2), and guide arc surfaces are arranged at the tops of the positioning grooves (37).
5. The high precision plastic injection mold according to claim 1, wherein: the drawing die is characterized in that a first rectangular sliding block (40) is fixedly connected to the bottom of the drawing die (13), a third channel (41) in sliding fit with the first rectangular sliding block (40) is formed in the bottom of the fixed die, mounting grooves are formed in two sides of the first rectangular sliding block (40), rollers (38) distributed at equal intervals are rotatably connected to the inside of each mounting groove, and the rollers (38) are in contact with the inner wall of the third channel (41).
6. The high precision plastic injection mold according to claim 1, wherein: the bottom of the inner wall of the rectangular sliding groove (202) of the fixed die (2) is rotatably connected with a plurality of guide rollers (39) distributed at equal intervals, and the guide rollers (39) are lower than the rear guide rollers (39) at the foremost side.
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| CN112757585B (en) * | 2021-02-01 | 2023-03-28 | 杭州纳网信息科技有限公司 | Processing technology of high-toughness plastic clothes hanger |
| CN112776249A (en) * | 2021-02-04 | 2021-05-11 | 王佃江 | Injection molding equipment with anti-sticking function |
| CN114308286A (en) * | 2021-12-30 | 2022-04-12 | 长沙天创粉末技术有限公司 | Grinding tank locking mechanism of ball mill |
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| JPH0671742B2 (en) * | 1992-01-09 | 1994-09-14 | 陸人 上村 | Injection molding method for molded article having male screw and injection molding apparatus for molded article |
| US7811497B2 (en) * | 2003-06-24 | 2010-10-12 | Johnson Controls Technology Company | Multi-color injection molded door panel and process |
| FR2994882B1 (en) * | 2012-08-28 | 2015-08-21 | Valeo Vision | INJECTION MOLDING DEVICE COMPRISING A DRAWER |
| EP3109026B1 (en) * | 2015-06-23 | 2018-11-28 | Gerresheimer Regensburg GmbH | Device for the production of plastics objects with inserts |
| CN106217750B (en) * | 2016-07-25 | 2018-07-06 | 温州意华接插件股份有限公司 | Flat needle material strip injection molding machine |
| CN207240700U (en) * | 2017-08-11 | 2018-04-17 | 浙江大雄模业有限公司 | Injection mold plastic insert fixed mechanism |
| CN207415885U (en) * | 2017-09-29 | 2018-05-29 | 四川瑞宝电子股份有限公司 | A kind of mold for being used to manufacture precision connector |
| CN208020657U (en) * | 2018-02-26 | 2018-10-30 | 五度自动化设备（深圳）有限公司 | Encapsulation die |
| CN109366887A (en) * | 2018-12-04 | 2019-02-22 | 创意塑胶工业（苏州）有限公司 | For manufacturing the injection mold of composite structural member |
| CN110001004A (en) * | 2019-04-17 | 2019-07-12 | 宁波光明橡塑有限公司 | A kind of vertical internal plastic part high-voltage shield mold |
| CN110861254A (en) * | 2019-11-08 | 2020-03-06 | 东莞市邦诚达自动化科技有限公司 | Full-automatic pulling-on piece placing, injection molding and encapsulation machine |
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