CN113843982A

CN113843982A - Inclined ejection spring needle linkage mechanism

Info

Publication number: CN113843982A
Application number: CN202110982233.6A
Authority: CN
Inventors: 梁正华; 梁凯; 林连明; 王华良
Original assignee: Zhejiang Kaihua Mould Co Ltd
Current assignee: Zhejiang Kaihua Mould Co Ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2021-12-28
Also published as: WO2023024295A1

Abstract

The invention discloses an inclined ejection spring needle linkage mechanism which comprises an inclined ejection block, wherein the lower part of the inclined ejection block is connected with a first inclined ejector rod, the top of the first inclined ejector rod is provided with a limit nut, the bottom of the inclined ejection block is provided with a waist-shaped limit hole, the limit nut is connected with the waist-shaped limit hole in a sliding manner, and the lower part of the first inclined ejector rod is provided with a second inclined ejector rod. Utilize first oblique ejector pin and second oblique ejector pin to promote the oblique kicking block of echelonment, make bolt recess and bullet needle separation on the product, the kicking block to one side with first movable mould board separation back, make oblique kicking block and product separate completely under guide block and drive spring's effect, this speed of the product drawing of patterns of part shape relatively complicated when having accelerated to handle back-off, and simple structure, installation easy maintenance.

Description

Inclined ejection spring needle linkage mechanism

Technical Field

The invention relates to the technical field of injection molds, in particular to an inclined ejection spring needle linkage mechanism.

Background

Injection molding is a production tool that can be used repeatedly to mass produce plastic parts or articles. The mold is formed by molding parts to form one or more cavities after assembly, or to form the shape of the article that we desire. Injection molds are the most structurally complex of all plastic molds. The manufacturing and processing precision is highest, and the most common mould is used. The injection mould must be installed on the plastic injection machine when working, the injection machine realizes the opening and closing of the moving mould and the fixed mould of the mould, and the required products are molded according to the following sequence: closing the mold, injecting the melt into the cavity, maintaining the pressure, cooling, opening the mold, pushing out the product and closing the mold. The level of the mold production technology is not only an important mark for measuring the level of the product manufacturing level in a country, but also determines the product quality, the benefit and the new product development capability of the country to a great extent. At present, 30% of common moulds in China and more than half of middle-high grade moulds still depend on imported injection moulds in large proportion. Therefore, the lagging of the mold manufacturing industry becomes a bottleneck for retarding the development of the manufacturing industry in China to some extent. The development and introduction of advanced manufacturing technology are important ways for changing the relative lag of the injection mold manufacturing industry and the rapid increase of market demand in China. With the continuous development of the industry in China, higher and higher requirements are put on the mold, so the development of the requirement of the precise, large, complex and long-service-life mold is higher than the total development speed.

With the progress of machining technology, the shape complexity of the injection molding surface of the injection mold is greatly increased in order to provide a better stress structure and a pneumatic structure for an injection molding part, an inclined ejector rod for ejecting a complex curved surface in an inclined mode is applied to the injection mold in order to ensure the demolding convenience of the more complex injection molding part, and the inclined ejector is usually adopted to process the back-off in the ejection process after the injection mold product is molded. When the back-off is processed by the inclined top, the back-off of the product often contains deep ribs, and the deep ribs of the product often stick to the inclined top when being ejected, so that the smooth demoulding of the product is influenced.

For example, the present invention relates to a stepped lifter structure applied to a mold, which includes a lifter, a lifter rod, a lifter seat, an elastic member and a guide block, and is disclosed in chinese patent document having a publication number of "CN 105479692A". Two ends of the inclined ejector rod are respectively fixedly connected with the inclined ejector and the inclined ejector seat; the inclined top seat is movably arranged on the top plate and can slide on the surface of the top plate. The inclined ejection mechanism disclosed by the invention has the advantages that the action of ejecting a product in the die through the inclined ejection is divided into two steps through the inclined plane staggered structure between the inclined ejection rod and the guide block, firstly, the product is ejected out by the inclined ejection rod along the vertical direction, and secondly, the inclined ejection rod laterally looses the core. Because the product leaving the die does not have holding force on the pitched roof mechanism any more, the product demoulded by the pitched roof mechanism has small deformation and good quality.

Disclosure of Invention

The invention aims to solve the problem that the demoulding of a part of product with a complicated shape is difficult when the back off is processed in the ejection process after the injection mold product is formed, and provides an inclined ejection spring needle linkage mechanism.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a to one side bullet needle link gear, characterized by, includes the kicking block to one side, kicking block sub-unit connection has first oblique ejector pin to one side, first oblique ejector pin top is equipped with stop nut, the kicking block bottom is equipped with the spacing hole of waist type to one side, stop nut sliding connection is in the spacing hole of waist type, first oblique ejector pin lower part is equipped with the oblique ejector pin of second. Product lower wall is hugged closely to kicking block structure one side to one side, the opposite side is the echelonment, contact with first movable mould board, the spacing nut on the first oblique ejector pin of waist type spacing hole cooperation of kicking block bottom to one side, stop nut and first oblique ejector pin fixed connection, the spacing downthehole slip protective sheath that is equipped with of waist type, stop nut slides in the spacing downthehole of waist type, and stop nut has the chucking to detain when the both ends position in the spacing hole of waist type to consolidate, the chucking is detained and needs certain power just can open, so first oblique ejector pin and the oblique ejector pin of second can only stop in two end positions, stop nut drives first oblique ejector pin and moves, further driven the bullet needle and break away from in the bolt groove. The design is ingenious and the structure is simple.

Preferably, a sliding barrel is arranged in the inclined ejecting block, a driving spring is arranged in the sliding barrel, one end of the driving spring is in contact with the inner wall of the inclined ejecting block, the other end of the driving spring is fixedly connected with the guide block, a guide rod is arranged at the bottom of the guide block, and the bottom of the guide rod is slidably connected with a waist-shaped hole groove of the sliding limiting surface. The inside groove that is equipped with of kicking block to one side, the inslot is equipped with a series of slider, because the kicking block to one side receives the effect of oblique ejector pin, because drive spring one end and oblique kicking block internal connection again, the effect of drive spring down slide cartridge and guide bar can move to the direction of demolding to also drive kicking block to one side and product separation.

Preferably, the oblique ejector block is internally provided with an elastic needle hole, two ends of the elastic needle hole are provided with spring limiting cylinders, a bolt column spring is arranged in the spring limiting cylinder, the bottom of the oblique ejector block is provided with an oblique ejector rod mounting groove, and the oblique ejector rod mounting groove is provided with a waist-shaped limiting hole and a plurality of threaded holes. The inside bullet needle that is equipped with of bullet pinhole, the one end of bullet needle supports the bolt recess of product, and the other end is fixed with the bullet needle fixed orifices on the mounting panel, and the spring of the both sides in bullet pinhole and the spacing section of thick bamboo of spring can accelerate the bullet needle and break away from in the speed of bolt recess, improve the efficiency of whole drawing of patterns process.

Preferably, the oblique ejector block passes through mounting panel and first oblique ejector pin top fixed connection, be equipped with bullet needle fixed orifices and heavy groove on the mounting panel, bullet needle fixed orifices is fixed with the bullet needle, bullet needle and bullet needle hole contact. The mounting plate is used for connecting the oblique ejector rod and the elastic needle, and when the oblique ejector rod limiting nut slides in the waist-shaped limiting hole, the elastic needle can move along with the oblique ejector rod due to the fact that the mounting plate is connected with the oblique ejector rod.

Preferably, the first oblique ejector rod is axially embedded into the second oblique ejector rod, a first oblique ejector rod spring is arranged on the surface of the first oblique ejector rod embedded into the portion of the second oblique ejector rod, the bottom end of the first oblique ejector rod spring is fixed to the bottom of the first oblique ejector rod, the top end of the first oblique ejector rod spring is fixed to the top of the second oblique ejector rod, the bottom of the second oblique ejector rod is connected to the sliding block seat, and the sliding block seat is connected to the lower ejector rod plate in a sliding mode. The first oblique ejector rod and the second oblique ejector rod can slide up and down and are adjusted automatically, and the first oblique ejector rod and the second oblique ejector rod can slide together to adjust the position of the oblique ejector rod.

Preferably, the upper portion of the lower ejector plate is provided with an upper ejector plate, the lower ejector plate is further provided with a straight ejector seat, a straight ejector rod is fixed on the straight ejector seat, and the lower ejector plate is mounted on the lower compound plate through a pin shaft. The straight ejector rod and the inclined ejector rod support the product together, and the lower ejector rod plate drives the upper ejector rod plate, the straight ejector rod seat, the straight ejector rod, the second inclined ejector rod and the sliding block seat to move together in the demolding process, so that the product is ejected out, and then demolding is performed.

Preferably, the lower doubling plate is provided with a plurality of mold feet, the mold feet are provided with a first movable mold plate and a second movable mold plate, the upper parts of the first movable mold plate and the second movable mold plate are provided with products, the upper parts of the products are provided with fixed mold plates, and the fixed mold plates are provided with upper doubling plates. The lower compound plate can also drive the upper ejector rod plate and the lower ejector rod plate to move backwards, and the upper compound plate and the fixed template are not moved.

Preferably, the upper part of the straight ejector rod is in contact with the lower part of the product, the straight ejector rod penetrates through the first movable template, and one side of the first movable template, which is close to the straight ejector rod, is in a step shape and is in coincident contact with the step shape of the inclined ejector block. The lower wall of the product is provided with a plurality of convex ribs, the first movable template is also provided with a groove, and the first movable template are contacted and attached to each other.

Therefore, the invention has the following beneficial effects:

1. the invention greatly improves the demoulding speed of products with complicated shapes, such as convex ribs, grooves and the like, and has simple structure and convenient installation and maintenance;

2. the first oblique ejector rod and the second oblique ejector rod are used for pushing the stepped oblique ejector block to separate the bolt groove and the elastic needle on the product, and after the oblique ejector block is separated from the first movable template, the oblique ejector block is completely separated from the product under the action of the guide block and the driving spring.

Drawings

FIG. 1 is a general schematic view of a slant top latch needle linkage according to the present invention;

FIG. 2 is a schematic diagram of the mechanism of the present invention with the fixed and movable plates separated; ,

FIG. 3 is a structural diagram of the inclined ejector block and the movable template of the inclined ejector pin linkage mechanism after being separated;

FIG. 4 is a schematic diagram of the angle ejection pin linkage after it has been completely removed from the mold;

FIG. 5 is a schematic view of the internal structure of the inclined ejection block of the inclined ejection spring needle linkage mechanism of the present invention

FIG. 6 is a schematic view of a mounting plate for a slant top latch needle linkage according to the present invention;

in the figure, 1, a product 2, an upper doubling plate 3, a fixed template 4, an inclined ejector block 41, a sliding cylinder 42, a guide block 43, a driving spring 44, a guide rod 45, a sliding limiting surface 46, a spring limiting cylinder 47, a bolt column spring 48, an elastic needle groove 49, an inclined ejector rod mounting groove 5, a first movable template 6, a mold foot 7, a second movable template 8, a first inclined ejector rod 9, a second inclined ejector rod 10, a first inclined ejector rod spring 11, a slider seat 12, an upper ejector rod plate 13, a lower ejector rod block 14, a straight ejector rod 15, a lower doubling plate 16 mounting plate 161, an elastic needle 162, a sinking groove 163, an elastic needle fixing hole 17, a limiting nut 18 and a waist-shaped limiting hole.

Detailed Description

Example 1

The embodiment provides an oblique ejector pin link gear, refer to fig. 1, including oblique kicking block 4, the 4 sub-unit connections in oblique kicking block have first oblique ejector pin 8, and first oblique ejector pin 8 top is equipped with stop nut 17, and oblique kicking block 4 bottom is equipped with the spacing hole of waist type 18, and stop nut 17 sliding connection is in the spacing hole of waist type 18, and first oblique ejector pin 8 lower part is equipped with second oblique ejector pin 9. A sliding barrel 41 is arranged in the inclined ejector block 4, a driving spring 43 is arranged in the sliding barrel 41, one end of the driving spring 43 is in contact with the inner wall of the inclined ejector block 4, the other end of the driving spring 43 is fixedly connected with a guide block 42, a guide rod 44 is arranged at the bottom of the guide block 42, and the bottom of the guide rod 44 is slidably connected with a waist-shaped hole groove of a sliding limiting surface 45. Still be equipped with bullet needle groove 48 in the oblique kicking block 4, bullet needle groove 48 both ends are equipped with spring spacing section of thick bamboo 46, are equipped with bolt post spring 47 in the spring spacing section of thick bamboo 46, and oblique kicking block 4 bottom is equipped with oblique ejector pin mounting groove 49, is equipped with spacing hole 18 of waist type and a plurality of screw hole on the oblique ejector pin mounting groove 49. The inclined ejector block 4 is fixedly connected with the top of the first inclined ejector rod 8 through the mounting plate 16, an elastic needle fixing hole 163 and a sinking groove 162 are formed in the mounting plate 16, an elastic needle 161 is fixed in the elastic needle fixing hole 163, and the elastic needle 161 is in contact with the elastic needle groove 48. In the first oblique ejector pin 8 axial embedding second oblique ejector pin 9, the embedding is equipped with first oblique ejector pin spring 10 in the first oblique ejector pin 8 surface of second oblique ejector pin 9 part, and first oblique ejector pin spring 10 bottom mounting is in first oblique ejector pin 8 bottom, and first oblique ejector pin spring 10 top is fixed in second oblique ejector pin 9 top, and second oblique ejector pin 9 bottom is connected in take-up housing 11, and take-up housing 11 sliding connection is in ejector plate 13 down. The upper part of the lower ejector plate 13 is provided with an upper ejector plate 12, the lower ejector plate 13 is also provided with a straight ejector seat, a straight ejector 14 is fixed on the straight ejector seat, and the lower ejector plate 13 is arranged on a lower compound plate 15 through a pin shaft. The lower compound plate 15 is provided with a plurality of mould feet 6, the plurality of mould feet 6 are provided with a first movable mould plate 5 and a second movable mould plate 7, the upper parts of the first movable mould plate 5 and the second movable mould plate 7 are provided with a product 1, the upper part of the product 1 is provided with a fixed mould plate 3, and the fixed mould plate 3 is provided with an upper compound plate 2. The upper part of the straight ejector rod 14 is contacted with the lower part of the product 1, the straight ejector rod 14 penetrates through the first movable mould plate 5, and one side of the first movable mould plate 5, which is close to the straight ejector rod 14, is in a step shape and is superposed and contacted with the step shape of the inclined ejector block 4.

Product lower wall is hugged closely to kicking block structure one side to one side, the opposite side is the echelonment, contact with first movable mould board, spacing nut on the first oblique ejector pin of waist type spacing hole cooperation of kicking block bottom to one side, spacing nut and first oblique ejector pin fixed connection, the spacing downthehole slip protective sheath that is equipped with of waist type, spacing nut slides in the spacing downthehole of waist type, spacing nut has the chucking to detain when the both ends position in the spacing hole of waist type to consolidate, the chucking is detained and is needed certain power just to open, so first oblique ejector pin and the oblique ejector pin of second can only stop in two terminal positions, spacing nut drives first oblique ejector pin and moves, further driven the bullet needle and break away from in the bolt recess. The inside bullet needle that is equipped with of bullet pinhole, the one end of bullet needle supports the bolt recess of product, the other end is fixed with the bullet needle fixed orifices on the mounting panel, the spring of the both sides in bullet pinhole and the spacing section of thick bamboo of spring can accelerate the bullet needle and break away from in the speed of bolt recess, the effect of mounting panel is for connecting oblique ejector pin and bullet needle, when oblique ejector pin stop nut slides in the spacing downthehole of waist type, because the mounting panel is connected with oblique ejector pin, so the bullet needle also can be along with oblique ejector pin moves together. The straight ejector rod and the inclined ejector rod support the product together, and the lower ejector rod plate drives the upper ejector rod plate, the straight ejector rod seat, the straight ejector rod, the second inclined ejector rod and the sliding block seat to move together in the demolding process, so that the product is ejected out, and then demolding is performed. The first oblique ejector rod and the second oblique ejector rod are used for pushing the stepped oblique ejector block to separate the bolt groove and the elastic needle on the product, and after the oblique ejector block is separated from the first movable template, the oblique ejector block is completely separated from the product under the action of the guide block and the driving spring.

Referring to fig. 1, firstly, the inclined ejector pin linkage mechanism of the invention is in a mold closing state, a product is placed among a fixed mold plate, a first movable mold plate and a second movable mold plate, a convex rib of the product is overlapped and contacted with a groove on the first movable mold plate, a straight ejector rod also penetrates through the top of the first movable mold plate to abut against the lower wall of the product, the straight ejector rod and an inclined ejector block support the weight of the product in the whole demolding process together, meanwhile, a limit nut on the inclined ejector rod is positioned on the left side of an upper waist-shaped limit hole of the inclined ejector block, a bolt column spring in a spring limit cylinder is in a compressed but undamaged state at this time, and a spring connected with a sliding cylinder in the inclined ejector block is not acted by force at this time. Referring to fig. 2, the upper doubling plate and the fixed die plate are separated from the movable die plate, and at this time, the upper wall of the product is completely exposed, but the lower wall is still attached to the first movable die plate, the second movable die plate and the inclined ejector block. Referring to fig. 3, at this time, the lower ejector plate starts to drive the slider seat to start ejecting motion, so as to decompose the force, and the force is viewed as two component forces, namely, the force moving to the right and the upward, and the slider seat drives the second oblique ejector rod and the first oblique ejector rod to move to the right, but the oblique ejector rod is partially connected with the oblique ejector block in a sliding manner, so that the oblique ejector rod has a rightward force acting on the oblique ejector block, but the oblique ejector block is kept still due to the inertia effect, the limit nut on the oblique ejector rod slides in the waist-shaped limit hole, because the mounting plate is connected with the oblique ejector rod through a screw, the mounting plate and the elastic needle connected with the mounting plate move to the right together, the elastic needle accelerates the ejecting speed under the acting force of the bolt column spring in the spring limit cylinder, until the elastic needle completely ejects out of the bolt groove, the limit nut on the oblique ejector rod slides to the rightmost end in the waist-shaped limit hole and is fastened by a fastener, the clamping buckle can be opened only by a certain force, so that the first oblique ejector rod and the second oblique ejector rod can only stop at two end positions, the limiting nut drives the first oblique ejector rod to move, the elastic pin is further driven to be separated from the bolt groove, and the clamping buckle is ingenious in design and simple in structure. Secondly, the component force in the upward direction is applied, the first oblique ejector rod and the second oblique ejector rod are driven to eject in the upward direction, the lower wall of the product is separated from the first movable template and the second movable template, the step-shaped structure on the right side of the oblique ejector block is completely separated from the step-shaped structure of the first movable template, and the convex rib of the product is also separated from the groove of the first movable template, as shown in the figure 4, the oblique ejector block is applied with the oblique upward force of the first oblique ejector rod, so that the oblique ejector block has the oblique upward movement trend, because the oblique ejector block is internally provided with the groove, the groove is internally provided with a series of sliding devices, because the oblique ejector block is applied with the force of the oblique ejector rod, because one end of the driving spring is connected with the interior of the oblique ejector block, the other end of the driving spring is connected with the sliding cylinder, after the spring is applied with the elasticity, the sliding cylinder and the guide rod can move in the right direction, and because the product is fixed by the straight ejector rod and the convex rib, the left and right transverse movement can not be carried out before the separation, so the inclined ejector block can be separated from the product left and right, and the product demoulding is finished.

Claims

1. The utility model provides a bullet needle link gear pushes up to one side, characterized by, includes kicking block (4) to one side, kicking block (4) sub-unit connection has first oblique ejector pin (8) to one side, first oblique ejector pin (8) top is equipped with stop nut (17), kicking block (4) bottom is equipped with spacing hole of waist type (18) to one side, stop nut (17) sliding connection is in spacing hole of waist type (18), first oblique ejector pin (8) lower part is equipped with oblique ejector pin of second (9).

2. The inclined ejector pin linkage mechanism according to claim 1, wherein a sliding barrel (41) is arranged in the inclined ejector block (4), a driving spring (43) is arranged in the sliding barrel (41), one end of the driving spring (43) is in contact with the inner wall of the inclined ejector block (4), the other end of the driving spring (43) is fixedly connected with a guide block (42), a guide rod (44) is arranged at the bottom of the guide block (42), and the bottom of the guide rod (44) is slidably connected with a waist-shaped hole groove of a sliding limiting surface (45).

3. The angle ejector spring needle linkage mechanism as claimed in claim 1 or 2, wherein a spring needle groove (48) is further formed in the angle ejector block (4), spring limiting cylinders (46) are arranged at two ends of the spring needle groove (48), a bolt column spring (47) is arranged in the spring limiting cylinder (46), an angle ejector rod mounting groove (49) is formed in the bottom of the angle ejector block (4), and a waist-shaped limiting hole (18) and a plurality of threaded holes are formed in the angle ejector rod mounting groove (49).

4. The inclined ejector pin linkage mechanism as claimed in claim 1, 2 or 3, wherein the inclined ejector block (4) is fixedly connected with the top of the first inclined ejector pin (8) through a mounting plate (16), a pin fixing hole (163) and a sinking groove (162) are formed in the mounting plate (16), a pin (161) is fixed in the pin fixing hole (163), and the pin (161) is in contact with the pin groove (48).

5. The angle ejector spring needle linkage mechanism as claimed in claim 1, wherein the first angle ejector rod (8) is axially embedded in the second angle ejector rod (9), a first angle ejector rod spring (10) is arranged on the surface of the first angle ejector rod (8) embedded in the second angle ejector rod (9), the bottom end of the first angle ejector rod spring (10) is fixed on the bottom of the first angle ejector rod (8), the top end of the first angle ejector rod spring (10) is fixed on the top of the second angle ejector rod (9), the bottom of the second angle ejector rod (9) is connected to the slider seat (11), and the slider seat (11) is slidably connected to the lower ejector rod plate (13).

6. The slant top spring needle linkage mechanism as claimed in claim 5, wherein the upper top rod plate (12) is arranged on the upper portion of the lower top rod plate (13), the lower top rod plate (13) is further provided with a straight top rod seat, a straight top rod (14) is fixed on the straight top rod seat, and the lower top rod plate (13) is mounted on the lower compound plate (15) through a pin shaft.

7. The angle ejector spring needle linkage mechanism according to claim 6, wherein a plurality of mold feet (6) are arranged on the lower compound plate (15), a first movable mold plate (5) and a second movable mold plate (7) are arranged on the plurality of mold feet (6), the first movable mold plate (5) and the second movable mold plate (7) are provided with a product (1) at the upper part, a fixed mold plate (3) is arranged at the upper part of the product (1), and an upper compound plate (2) is arranged on the fixed mold plate (3).

8. The inclined ejector pin and spring needle linkage mechanism is characterized in that the upper part of the straight ejector pin (14) is in contact with the lower part of the product (1), the straight ejector pin (14) penetrates through the first movable template (5), and one side of the first movable template (5) close to the straight ejector pin (14) is in a step shape and is in coincident contact with the step shape of the inclined ejector block (4).