CN220763447U - Injection mold for necking pipe - Google Patents

Abstract

The utility model discloses an injection mold for a necking pipe, which comprises an upper mold plate, a lower mold plate, a first movable block and a second movable block, wherein a necking pipe cavity is arranged between the upper mold plate and the lower mold plate, the lower mold plate is provided with an injection molding channel and is communicated with the necking pipe cavity, the upper mold plate is provided with an injection molding opening and is communicated with the injection molding channel, the lower mold plate is provided with a plurality of concave cavities, positioning blocks are arranged on two sides of each concave cavity, guide grooves are arranged at the bottoms of the positioning blocks, two retaining grooves are arranged at the bottoms of the first movable block and the second movable block, and the first movable block and the second movable block are arranged in the guide grooves. According to the utility model, the first movable block and the second movable block are moved, so that the core column is conveniently pulled away from the side surface of the reducing pipe, the demolding is convenient, and the check block and the check groove are matched, so that whether the core column is positioned in the cavity of the necking pipe or not is conveniently positioned, and the product has the advantages of convenience in demolding, improvement of production efficiency and the like.

Description

Injection mold for necking pipe

Technical Field

The utility model relates to the technical field of mold equipment, in particular to an injection mold for a necking pipe.

Background

The injection molding method has the advantages of high production speed, high efficiency, automatic operation, multiple patterns, various shapes, large size, accurate product size, easy updating of the product, capability of forming the product with complex shape, suitability for mass production, complex shape product and other molding processing fields,

because necking down pipe itself is equipped with the reducing portion, and the inside draft angle that is equipped with of reducing pipe to make things convenient for the drawing of patterns, the stem sets up inside the necking down pipe, so that the inside cavity that forms of necking down pipe, however, current necking down pipe is moulded plastics and is adopted the design of moulding plastics perpendicularly generally, the stem after being heated produces close contact with the necking down pipe easily, leads to the difficult drawing of patterns of necking down pipe, need take out the necking down pipe through manual or borrow the instrument, and comparatively consuming time and have certain danger when taking out, seriously influence the production efficiency of necking down pipe. The applicant has thus devised an advantageous design and found a solution to the above-mentioned problems, in which the technical solutions described below are created.

Disclosure of Invention

The utility model aims to provide an injection mold for a necking pipe, which aims to solve the problems in the prior art. In order to solve the problems, the utility model adopts the following technical scheme.

The utility model provides an injection mold for necking down is effective, includes cope match-plate pattern, lower bolster, first movable block, second movable block, be equipped with necking down tube die cavity between cope match-plate pattern, the lower bolster is equipped with the passageway of moulding plastics to with necking down tube die cavity intercommunication, the cope match-plate pattern is equipped with the mouth of moulding plastics, and with the passageway intercommunication of moulding plastics, the lower bolster is equipped with a plurality of cavitys, the both sides of cavity are equipped with the locating piece, the bottom of locating piece is equipped with the guide slot, the bottom of first movable block, second movable block is equipped with two stopping grooves, first movable block, second movable block set up in the guide slot, the bottom of first movable block, second movable block, cavity is equipped with the through-hole of stepping down, the bottom of cavity is equipped with the stopping block, and sets up in one of them stopping inslot, first movable block is equipped with first core, second core, the second movable block is equipped with the third core, the fourth core is equipped with the fourth core, first core, the third core, fourth core are equipped with in necking down tube, the setting up in the through-hole, the setting up in the die cavity.

Preferably, the first core column is hollow, a cooling pipeline is arranged in the first core column, and the first movable block is provided with an input port and an output port and is communicated with the cooling pipeline.

Preferably, the first movable block is provided with a first fixed block, the first fixed block is provided with a first counter bore, the first movable block is provided with a second counter bore, the second counter bore is provided with a sealing ring, the heads of the first core column and the second core column are arranged in the first counter bore, and the head of the first core column is in contact with the sealing ring.

Preferably, the second movable block is provided with a second fixed block, the connection between the second fixed block and the second movable block is an I-shaped block, the second fixed block is provided with a third counter bore, and the head of the third core column is arranged in the third counter bore.

Preferably, the bottom of cavity is equipped with anti-skidding groove, first movable block, second movable block are equipped with the fixed orifices, be the opposition setting between the first movable block, between the second movable block.

Preferably, the upper template is provided with an upper template core plate, the lower template is provided with a lower template core plate, cooling pipelines are arranged in the upper template core plate and the lower template core plate, the upper template core plate and the lower template core plate are provided with inserts and are arranged in the necking pipe cavity, the side surfaces of the upper template and the lower template are provided with an input port and an output port and are communicated with the cooling pipelines, threaded holes are formed in two sides of the upper template and the lower template, and first through holes are formed in four corners of the upper template and the lower template.

Preferably, the bottom both sides of lower bolster are equipped with the supporting shoe, the supporting shoe is equipped with first guide post, first guide post passes first through-hole, the bottom of supporting shoe is equipped with the fixed plate, the lower bolster is equipped with a plurality of second through-holes, the second through-hole is equipped with the fourth counter bore, the second through-hole is equipped with the second guide post, and sets up between the supporting shoe, the terminal surface of second guide post is equipped with the fly leaf, the fourth counter bore is equipped with the spring, and acts on the fly leaf.

Preferably, the fixed plate is provided with a plurality of positioning columns, passes through the movable plate and contacts with the lower template, the fixed plate is provided with a plurality of fixed columns, and passes through the movable plate and is fixedly connected with the lower template, the side of the fixed plate is provided with a first position avoiding groove, the first position avoiding groove is provided with a limit switch, and the center of the fixed hole is provided with a third through hole.

Preferably, the movable plate is provided with a plurality of ejector pins and is arranged in the necking pipe cavity and the injection molding channel, the movable plate is provided with a plurality of limit posts, the side surface of the movable plate is provided with a second position avoiding groove, and the second position avoiding groove is provided with a contact block and is in contact with the limit switch.

The beneficial effects are that:

compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the first movable block and the second movable block are moved, so that the core column is conveniently pulled away from the side face of the reducing pipe, the demolding is convenient, meanwhile, the cooling pipeline is arranged in the first core column, the cooling effect on the first core column can be quickly achieved, the first core column is conveniently separated from the necking pipe by virtue of the principle of thermal expansion and contraction, the problem that the necking pipe is difficult to demold due to the fact that the heated core column is easy to be in close contact with the necking pipe is solved, the necking pipe needs to be taken out manually or by means of a tool, the problem that the necking pipe is time-consuming and has a certain danger is solved, and the positioning of whether the core column is in the necking pipe cavity is convenient through the cooperation of the retaining block and the retaining groove is convenient, so that the product has the advantages of convenience in demolding, improvement of production efficiency and the like.

Drawings

FIG. 1 is a schematic view of an injection mold for a neck tube according to the present utility model;

FIG. 2 is a top cross-sectional view of an injection mold for a neck pipe according to the present utility model;

FIG. 3 is an enlarged view showing a partial structure of a detail A of an injection mold for a neck pipe according to the present utility model of FIG. 2;

FIG. 4 is a schematic side sectional view of an injection mold for a neck pipe according to the present utility model;

FIG. 5 is a top view of a lower plate of an injection mold for a neck tube according to the present utility model;

FIG. 6 is a bottom view of a lower plate of an injection mold for a neck pipe according to the present utility model;

FIG. 7 is a schematic view of the upper die plate of an injection mold for a necking tube in accordance with the present utility model;

FIG. 8 is an exploded view of an injection mold for a neck tube according to the present utility model;

FIG. 9 is a second exploded view of an injection mold for a neck tube according to the present utility model;

FIG. 10 is an exploded view of an injection mold for a neck tube;

FIG. 11 is a bottom view of a second movable block of an injection mold for a neck tube of the present utility model;

FIG. 12 is a bottom view of a first movable block of an injection mold for a neck tube of the present utility model;

FIG. 13 is a schematic side sectional view showing an exploded view of a first movable block of an injection mold for a neck pipe according to the present utility model;

the correspondence between the reference numerals and the component names in the drawings is as follows:

reference numerals: 1. an upper template; 2. a lower template; 3. a first movable block; 4. a second movable block; 5. a necking tube cavity; 6. a retaining groove; 7. a relief through hole; 8. a cooling pipe; 9. a fixing hole; 9.1, insert; 9.2, threaded holes; 9.3, a first through hole; 11. an injection molding port; 12. a fourth core column; 13. a limit rod; 14. an upper core plate; 21. an injection molding channel; 22. a cavity; 23. a positioning block; 24. a lower core plate; 25. a support block; 26. a fixing plate; 27. a second through hole; 28. a movable plate; 31. a first core barrel; 32. a second core barrel; 33. a first fixed block; 34. a second counterbore; 41. a third core column; 42. a second fixed block; 43. an I-shaped block; 81. an input port; 82. an output port; 221. a stop block; 222. an anti-skid groove; 231. a groove; 251. a first guide post; 261. positioning columns; 262. fixing the column; 263. a first clearance groove; 264. a limit switch; 265. a third through hole; 271. a fourth counterbore; 272. a spring; 273. a second guide post; 281. a thimble; 282. a limit column; 283. a second clearance groove; 284. a contact block; 331. a first counterbore; 341. a seal ring; 421. and a third counter bore.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1 to 13, an injection mold for a necking pipe comprises an upper mold plate 1, a lower mold plate 2, a first movable block 3 and a second movable block 4, wherein a necking pipe cavity 5 is arranged between the upper mold plate 1 and the lower mold plate 2, the lower mold plate 2 is provided with an injection channel 21 and is communicated with the necking pipe cavity 5, the upper mold plate 1 is provided with an injection port 11 and is communicated with the injection channel 21, the lower mold plate 2 is provided with a plurality of cavities 22, positioning blocks 23 are arranged on two sides of the cavities 22, guide grooves are arranged at the bottoms of the positioning blocks 23, two retaining grooves 6 are arranged at the bottoms of the first movable block 3 and the second movable block 4, a yielding through hole 7 is arranged at the bottoms of the first movable block 3, the second movable block 4 and the cavities 22, retaining blocks 221 are arranged at the bottoms of the cavities 22 and are arranged in one retaining groove 6, the first movable block 3 is provided with a first core column 31, the second core column 32, the second movable block 4 is provided with a third core column 41, the upper mold plate 1 is provided with a fourth core column 12, the first core column 31, the second core column 32, the third core column 32 and the fourth core column 41 are arranged on the upper mold plate 1 and the fourth core column 13 are arranged at the yielding through hole 13;

it should be noted that the interior of the first core column 31 is hollow, the interior of the first core column 31 is provided with a cooling pipeline 8, the first movable block 3 is provided with an input port 81 and an output port 82 and is communicated with the cooling pipeline 8, the interior of the first core column 31 is hollow, the cooling pipeline 8 is convenient to be arranged, the input port 81 inputs a cooled liquid medium, and the liquid medium after heat absorption flows out from the output port 82;

it should be noted that the first movable block 3 is provided with a first fixed block 33, the first fixed block 33 is provided with a first counter bore 331, the first movable block 3 is provided with a second counter bore 34, the second counter bore 34 is provided with a sealing ring 341, the heads of the first core column 31 and the second core column 32 are arranged in the first counter bore 331, the heads of the first core column 31 are in contact with the sealing ring 341, the first fixed block 33 has a fixing effect on the first core column 31 and the second core column 32, the second counter bore 34 ensures that the heads of the first core column 31 and the second core column 32 are flush with the surface of the first fixed block 33, the second counter bore 34 is matched with the sealing ring 341 for use, and the sealing ring 341 prevents liquid medium from leaking;

it should be noted that the second movable block 4 is provided with a second fixed block 42, the connection between the second fixed block 42 and the second movable block 4 is set as an i-shaped block 43, the second fixed block 42 is provided with a third counter bore 421, the head of the third core column 41 is arranged in the third counter bore 421, the second fixed block 42 plays a role in fixing the third core column 41, and the third counter bore 421 ensures that the third core column 41 is flush with the surface of the second fixed block 42;

it should be noted that, the bottom of the cavity 22 is provided with an anti-slip groove 222, the first movable block 3 and the second movable block 4 are provided with fixing holes 9, and the first movable block 3 and the second movable block 4 are oppositely arranged, and because the pressure inside the necking pipe cavity 5 is larger during injection molding, in order to prevent the first movable block 3 and the second movable block 4 from being retreated due to injection molding pressure, the first movable block 3 and the second movable block 4 are ensured to be in close contact with the necking pipe cavity 5 by matching the anti-slip groove 222, the limiting rod 13 and the anti-slip block 221 with the anti-slip groove 6;

it should be noted that the upper die plate 1 is provided with an upper die core plate 14, the lower die plate 2 is provided with a lower die core plate 24, the inner parts of the upper die core plate 14 and the lower die core plate 24 are provided with cooling pipelines 8, the upper die core plate 14 and the lower die core plate 24 are provided with inserts 9.1 and are arranged in the necking pipe cavity 5, the side surfaces of the upper die plate 1 and the lower die plate 2 are provided with an input port 81 and an output port 82 and are communicated with the cooling pipelines 8, the two sides of the upper die plate 1 and the lower die plate 2 are provided with threaded holes 9.2, the four corners of the upper die plate 1 and the lower die plate 2 are provided with first through holes 9.3, the cooling pipelines 8 ensure that the lower die core plate 24 and the upper die core plate 14 keep a relatively good state at temperature, the inserts 9.1 are printed with marks on the surface of the necking pipe, the threaded holes 9.2 are connected with an injection molding machine, a hydraulic system of the injection molding machine is convenient to control the movement of the upper die plate 1, and the first through holes 9.3 are matched with the first guide columns 251 for use;

it should be noted that, the two sides of the bottom of the lower die plate 2 are provided with supporting blocks 25, the supporting blocks 25 are provided with first guide posts 251, the first guide posts 251 penetrate through the first through holes 9.3, the bottom of the supporting blocks 25 are provided with fixed plates 26, the lower die plate 2 is provided with a plurality of second through holes 27, the second through holes 27 are provided with fourth counter bores 271, the second through holes 27 are provided with second guide posts 273 and are arranged between the supporting blocks 25, the end surfaces of the second guide posts 273 are provided with movable plates 28, the fourth counter bores 271 are provided with springs 272 and act on the movable plates 28, a reserved space between the supporting blocks 25 and the fixed plates 26 is the movable range of the movable plates 28, the first guide posts 251 provide guide functions when the upper die plate 1 and the lower die plate 2 are combined, the second through holes 27 are matched with the second guide posts 273 for use, the fourth counter bores 271 provide accommodation spaces for the springs 272 when the springs 272 are compressed, the movable plates 28 are prevented from deforming when the movable plates 28 are matched with the ejector pins 281 for use;

it should be noted that, the fixed plate 26 is provided with a plurality of positioning columns 261, and passes through the movable plate 28 to be in contact with the lower template 2, the fixed plate 26 is provided with a plurality of fixed columns 262, and passes through the movable plate 28 to be connected and fixed with the lower template 2, the side surface of the fixed plate 26 is provided with a first avoidance groove 263, the first avoidance groove 263 is provided with a limit switch 264, the center of the fixed hole 9 is provided with a third through hole 265, the positioning columns 261 ensure that the movable track of the movable plate 28 does not deviate greatly in the moving process, the ejector pins 281 are not bent, the fixed columns 262 strengthen the connection of the supporting block 25, the fixed plate 26 and the lower template 2, the first avoidance groove 263 is matched with the limit switch 264 to be used, and the ejector pin of the press is arranged in the third through hole 265 and is in contact with the movable block;

it should be noted that, the movable plate 28 is provided with a plurality of ejector pins 281, and is disposed in the necking tube cavity 5 and the injection molding channel 21, the movable plate 28 is provided with a plurality of limiting posts 282, the side surface of the movable plate 28 is provided with a second position avoidance groove 283, the second position avoidance groove 283 is provided with a contact block 284 and contacts with the limit switch 264, in the moving process of the movable plate 28, the ejector pins 281 extend to eject out the injection molding residues of the necking tube and the injection molding channel 21 in the necking tube cavity 5, the limiting posts 282 prevent the movable plate 28 from being too close to the lower die plate 2, and the elasticity of the spring 272 is protected.

The principle of use of the utility model will now be described as follows:

after the injection molding machine starts to convey liquid plastic from the injection port 11 to the injection channel 21 and enters the necking pipe cavity 5 until the necking pipe cavity 5 is filled, the injection molding machine stops conveying the liquid plastic, cooled liquid medium enters the cooling pipeline 8 from the input port 81, the temperature of the first core column 31, the upper core plate 14 and the lower core plate 24 is absorbed, the liquid plastic flows back into the storage tank from the output port 82, the cooling pipeline 8 accelerates to cool the necking pipe in the necking pipe cavity 5, the liquid plastic gradually changes to solid state, after cooling is finished, the hydraulic system of the injection molding machine separates the upper die plate 1 from the lower die plate 2, the limiting rod 13 leaves from the yielding through holes 7 at the bottoms of the first movable block 3, the second movable block 4 and the concave cavity 22, the fixing holes 9 of the first movable block 3 and the second movable block 4 are connected with the hydraulic system in advance, the hydraulic system starts to separate the first movable block 3 and the second movable block 4 from the necking pipe cavity 5, and at the moment, the initial stopping groove 6 is separated from the stopping block 221, the stopping block 221 is contacted with the other stopping groove 6, and the force of the stopping block 6 is formed to prop against the first movable block 3 and the second movable block 4.

The ejector rod of the press pushes the movable block to move towards the lower die plate 2, the second guide column 273 extends out of the second through hole 27, the spring 272 is extruded by the movable plate 28 to compress and store energy elasticity until the limit column 282 contacts with the lower die block, the press stops running, the ejector pin 281 extends out of the necking pipe cavity 5 and the injection channel 21 to eject the necking pipe and injection residues for the next injection, finally, the ejector rod of the press is retracted until the contact block 284 of the movable block contacts with the limit switch 264, the press stops running,

the hydraulic system starts to push the first movable block 3 and the second movable block 4 to reset, the stop block 221 is separated from the current stop groove 6, the stop block 221 is contacted with the initial stop groove 6 to form force against the first movable block 3 and the second movable block 4, the hydraulic system of the injection molding machine combines the upper die plate 1 with the lower die plate 2, and the limiting rod 13 enters from the yielding through hole 7 at the bottoms of the first movable block 3, the second movable block 4 and the concave cavity 22, so that the process of one-time injection molding is completed.

Through the design scheme, the product can be conveniently demoulded, and the production efficiency is improved.

The foregoing is a further elaboration of the present utility model in connection with the detailed description, and it is not intended that the utility model be limited to the specific embodiments shown, but rather that a number of simple deductions or substitutions be made by one of ordinary skill in the art without departing from the spirit of the utility model, should be considered as falling within the scope of the utility model as defined in the appended claims.

Claims (9)

1. The utility model provides an injection mold for necking down pipe, includes cope match-plate pattern (1), lower bolster (2), first movable block (3), second movable block (4), be equipped with necking down pipe die cavity (5), its characterized in that between cope match-plate pattern (1), lower bolster (2): the lower die plate (2) is provided with an injection molding channel (21) and is communicated with the necking pipe cavity (5), the upper die plate (1) is provided with an injection molding opening (11) and is communicated with the injection molding channel (21), the lower die plate (2) is provided with a plurality of concave cavities (22), two sides of each concave cavity (22) are provided with positioning blocks (23), the bottoms of each positioning block (23) are provided with guide grooves, the bottoms of each first movable block (3) and each second movable block (4) are provided with two retaining grooves (6), the first movable blocks (3) and the second movable blocks (4) are arranged in the guide grooves, the bottoms of the first movable blocks (3), the second movable blocks (4) and the concave cavities (22) are provided with yielding holes (7), the bottoms of the concave cavities (22) are provided with retaining blocks (221) and are arranged in one retaining groove (6), each first movable block (3) is provided with a first core column (31) and a second core column (32), each second movable block (4) is provided with a third core column (41), the upper die plate (1) is provided with a fourth core column (12), each second core column (31) is provided with a fourth core column (13), and is arranged in the abdication through hole (7).

2. The injection mold for a neck pipe according to claim 1, wherein: the inside of first stem (31) sets up to the cavity, the inside cooling tube (8) that is equipped with of first stem (31), first movable block (3) are equipped with input port (81), output port (82) to communicate with cooling tube (8).

3. The injection mold for a neck pipe according to claim 2, wherein: the first movable block (3) is provided with a first fixed block (33), the first fixed block (33) is provided with a first counter bore (331), the first movable block (3) is provided with a second counter bore (34), the second counter bore (34) is provided with a sealing ring (341), the heads of the first core column (31) and the second core column (32) are arranged in the first counter bore (331), and the head of the first core column (31) is in contact with the sealing ring (341).

4. An injection mold for a neck pipe according to claim 3, wherein: the second movable block (4) is provided with a second fixed block (42), the connection between the second fixed block (42) and the second movable block (4) is an I-shaped block (43), the second fixed block (42) is provided with a third counter bore (421), and the head of the third core column (41) is arranged in the third counter bore (421).

5. The injection mold for a neck pipe according to claim 4, wherein: the bottom of cavity (22) is equipped with anti-skidding groove (222), first movable block (3), second movable block (4) are equipped with fixed orifices (9), be the opposition setting between first movable block (3), between second movable block (4).

6. The injection mold for a neck pipe according to claim 5, wherein: the upper die plate (1) is provided with an upper die core plate (14), the lower die plate (2) is provided with a lower die core plate (24), a cooling pipeline (8) is arranged in the upper die core plate (14) and the lower die core plate (24), an insert (9.1) is arranged in the upper die core plate (14) and the lower die core plate (24), the upper die plate is arranged in a necking pipe cavity (5), an input port (81) and an output port (82) are arranged on the side face of the upper die plate (1) and the side face of the lower die plate (2) and are communicated with the cooling pipeline (8), threaded holes (9.2) are formed in the two sides of the upper die plate (1) and the two sides of the lower die plate (2), and first through holes (9.3) are formed in the four corners of the upper die plate (1) and the lower die plate (2).

7. The injection mold for a neck pipe according to claim 6, wherein: the bottom both sides of lower bolster (2) are equipped with supporting shoe (25), supporting shoe (25) are equipped with first guide post (251), first guide post (251) pass first through-hole (9.3), the bottom of supporting shoe (25) is equipped with fixed plate (26), lower bolster (2) are equipped with a plurality of second through-holes (27), second through-hole (27) are equipped with fourth counter bore (271), second through-hole (27) are equipped with second guide post (273), and set up between supporting shoe (25), the terminal surface of second guide post (273) is equipped with fly leaf (28), fourth counter bore (271) are equipped with spring (272), and act on fly leaf (28).

8. The injection mold for a neck pipe according to claim 7, wherein: the fixed plate (26) is provided with a plurality of positioning columns (261), and passes movable plate (28) and lower bolster (2) contact, fixed plate (26) is equipped with a plurality of fixed columns (262), and passes movable plate (28) and lower bolster (2) are connected fixedly, the side of fixed plate (26) is equipped with first position recess (263) of keeping away, first position recess (263) of keeping away is equipped with limit switch (264), the center of fixed orifices (9) is equipped with third through hole (265).

9. The injection mold for a neck pipe according to claim 8, wherein: the movable plate (28) is provided with a plurality of ejector pins (281), is arranged in the necking pipe cavity (5) and the injection molding channel (21), the movable plate (28) is provided with a plurality of limit posts (282), the side surface of the movable plate (28) is provided with a second position avoidance groove (283), and the second position avoidance groove (283) is provided with a contact block (284) and is in contact with the limit switch (264).