CN112590137A

CN112590137A - Injection mold is used in plastic tubing joint production

Info

Publication number: CN112590137A
Application number: CN202011531193.5A
Authority: CN
Inventors: 李元春
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-04-02

Abstract

The invention discloses an injection mold for producing a plastic pipe joint, which comprises an upper mold and a lower mold, wherein an annular block is fixedly arranged at the bottom of the upper mold, a notch is formed in the bottom of the upper mold, the notch is formed in the middle of the annular block, and a first cavity communicated with the top of the notch is formed in the upper mold. According to the invention, through the matched use of the upper die, the lower die, the annular block, the notch, the first cavity, the second cavity, the sliding plate, the limiting block, the first return spring and the push block mechanism, when the upper die and the lower die are closed, the second push block can be upwards extruded by the fixed pipe in the forming cavity, so that the sliding plate moves upwards and simultaneously drives the ejector pins to move upwards, the exhaust holes are in a communicated state, the ejector pins are driven to move oppositely by the first return spring when the die is opened, the purpose of quickly cleaning plastic inside the exhaust holes is realized, the cleaning time is reduced, and the production efficiency is improved.

Description

Injection mold is used in plastic tubing joint production

Technical Field

The invention belongs to the technical field of injection molds, and particularly relates to an injection mold for producing a plastic pipe joint.

Background

The plastic pipe is produced with synthetic resin, i.e. polyester, as material, stabilizer, lubricant, plasticizer, etc. and through extrusion in pipe making machine, and is used mainly for water pipe, drainage pipe, exhaust pipe, etc. in building.

The plastic pipe connects generally is through injection mold injection moulding, current injection mold is at the in-process of moulding plastics, exhaust hole through the shaping intracavity portion carries out the intracavity and exhausts, the diameter in exhaust hole is generally about 0.3mm, the in-process of moulding plastics has partial plastic to get into the exhaust hole, after the completion of moulding plastics carries out the die sinking, need clear up the exhaust hole, because the exhaust hole diameter is tiny, the clearance of being not convenient for, exhaust hole clearance consumes time many, influence production efficiency, the intracavity plastic of moulding plastics has the shaping chamber bottom to upwards annotate to fill simultaneously, it is not enough even to mould plastics in-process intracavity plastic, it is all with filling to need to spend time to wait for the plastic, can lengthen injection moulding time, influence the production efficiency of enterprise, for solving above-mentioned difficult problem, we have invented an injection mold for plastic pipe connects production.

Disclosure of Invention

The invention aims to solve the defects that in the prior art, exhaust holes are not convenient to clean and plastic injection in a cavity is not uniform enough in the injection molding process, and provides an injection mold for producing a plastic pipe joint.

In order to achieve the purpose, the invention adopts the following technical scheme:

an injection mold for producing a plastic pipe joint comprises an upper mold and a lower mold, wherein an annular block is fixedly installed at the bottom of the upper mold, a notch is formed in the bottom of the upper mold, the notch is arranged in the middle of the annular block, a first cavity communicated with the top of the notch is formed in the upper mold, a second cavity communicated with the top of the first cavity is formed in the upper mold, a sliding plate is arranged on the inner wall of the second cavity in a sliding and sealing manner, two limiting blocks are fixedly installed on the inner wall of the second cavity, a plurality of first return springs are fixedly connected between the sliding plate and the top of the second cavity, a plurality of exhaust holes communicated with the bottom of the second cavity are formed in the upper mold, air guide holes communicated with the side wall of the exhaust holes are formed in the upper mold, and the air outlet ends of the air guide holes are communicated with the side wall of the first cavity, a plurality of ejector pins are fixedly installed at the bottom of the sliding plate, the ejector pins are respectively inserted into the exhaust holes, and a push block mechanism is arranged in the notch in a sliding and sealing mode;

the pushing block mechanism is fixedly connected with the bottom of the sliding plate, the top of the lower die is provided with a forming cavity, the bottom of the forming cavity is fixedly provided with a fixed pipe, the bottom of the forming cavity is fixedly provided with an exhaust pipe, the lower die is internally provided with an air outlet hole communicated with the bottom of the exhaust pipe, the side wall of the exhaust pipe is provided with an air inlet hole, the inner wall of the fixed pipe is provided with a push plate in a sliding and sealing manner, a push plate sliding and sealing sleeve is arranged on the outer wall of the fixed pipe, a third reset spring which is sleeved on the fixed pipe is fixedly connected between the bottom of the push plate and the bottom of the forming cavity in a sliding manner, the side wall of the push plate is provided with a through hole, the inner wall of the fixed pipe is fixedly provided with fixed blocks which are arranged in parallel, the fixed blocks are arranged in sliding contact with, and a reset mechanism fixedly connected with the vibration mechanism is fixedly arranged at the top of the push plate.

Preferably, the ejector pad mechanism includes the first ejector pad that sets up with notch inner wall sliding seal contact, the bottom fixed mounting of first ejector pad has the second ejector pad, same through-hole has been seted up on first ejector pad and the second ejector pad, the top fixed mounting of first ejector pad has many connecting rods, many the connecting rod all sets up with the bottom fixed connection of slide.

Preferably, the vibration mechanism includes two dead levers of fixed mounting in push pedal top, two same connecting rod of fixedly connected with between the dead lever, it is equipped with the turning block to rotate the cover on the connecting rod, the turning block sets up with the fixed block contact, turning block and canceling release mechanical system fixed connection set up.

Preferably, the reset mechanism comprises an L-shaped plate fixedly mounted on the top of the push plate, and a second reset spring fixedly connected with the top of the rotating block is fixedly mounted at the bottom of the L-shaped plate.

Preferably, both ends of the fixed pipe are provided with openings, and the section of the inner wall of the fixed pipe is the same as that of the second push block.

Preferably, the penetrating openings are provided in a plurality, and the penetrating openings are uniformly distributed on the side wall of the outer ring of the push plate.

Preferably, the fixed blocks are provided with a plurality of rows, and the plurality of rows of fixed blocks are uniformly distributed on the inner wall of the fixed pipe.

Preferably, the fixing block is arranged in an inclined manner.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, through the matched use of the upper die, the lower die, the annular block, the notch, the first cavity, the second cavity, the sliding plate, the limiting block, the first return spring and the push block mechanism, when the upper die and the lower die are closed, the second push block can be upwards extruded by the fixed pipe in the forming cavity, so that the sliding plate moves upwards and simultaneously drives the ejector pins to move upwards, the exhaust holes are in a communicated state, the ejector pins are driven to move oppositely by the first return spring when the die is opened, the purpose of quickly cleaning plastic inside the exhaust holes is realized, the cleaning time is reduced, and the production efficiency is improved.

2. According to the invention, through the matched use of the lower die, the fixed pipe, the push plate, the exhaust pipe, the air inlet hole, the through hole, the fixed block, the vibration mechanism and the reset mechanism, the purpose that the push plate moves downwards and drives the rotating block to move downwards when the exhaust hole exhausts air in the injection molding process is realized, the purpose of continuously knocking the fixed block is realized, the purpose of vibration of the fixed pipe is realized, the uniform filling speed in the plastic injection molding process can be improved, and the production efficiency is improved.

Drawings

Fig. 1 is a schematic front perspective structural view of an injection mold for producing a plastic pipe joint according to the present invention;

FIG. 2 is a front perspective view of an upper mold part of an injection mold for producing a plastic pipe joint according to the present invention;

FIG. 3 is a schematic front perspective structural view of a lower mold of an injection mold for producing a plastic pipe joint according to the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 1 at A;

FIG. 5 is an enlarged view of a portion of FIG. 3 at B;

fig. 6 is a partially enlarged view at C in fig. 3.

In the figure: the device comprises an upper die 1, a lower die 2, a ring block 3, a notch 4, a first cavity 5, a second cavity 6, a sliding plate 7, a limiting block 8, a first return spring 9, an exhaust hole 10, an air guide hole 11, an ejector pin 12, a forming cavity 13, a fixing pipe 14, an exhaust pipe 15, an air outlet hole 16, an air inlet hole 17, a push plate 18, a through hole 19, a fixing block 20, a first push block 21, a second push block 22, a through hole 23, a push rod 24, a fixing rod 25, a connecting rod 26, a rotating block 27, a plate 28L, a second return spring 29 and a third return spring 30.

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.

Referring to fig. 1-6, an injection mold for producing plastic pipe joints comprises an upper mold 1 and a lower mold 2, wherein a ring-shaped block 3 is fixedly installed at the bottom of the upper mold 1, a notch 4 is formed at the bottom of the upper mold 1, the notch 4 is arranged in the middle of the ring-shaped block 3, a first chamber 5 communicated with the top of the notch 4 is formed in the upper mold 1, a second chamber 6 communicated with the top of the first chamber 5 is formed in the upper mold 1, a sliding plate 7 is arranged on the inner wall of the second chamber 6 in a sliding sealing manner, two limiting blocks 8 are fixedly installed on the inner wall of the second chamber 6, a plurality of first return springs 9 are fixedly connected between the sliding plate 7 and the top of the second chamber 6, a plurality of vent holes 10 communicated with the bottom of the second chamber 6 are formed in the upper mold 1, and vent holes 11 communicated with the side walls of the vent holes 10 are formed in the upper mold, the air outlet ends of the air guide holes 11 are communicated with the side wall of the first cavity 5, a plurality of ejector pins 12 are fixedly installed at the bottom of the sliding plate 7, the ejector pins 12 are respectively inserted into the exhaust holes 10, and a push block mechanism is arranged in the notch 4 in a sliding and sealing manner;

ejector pad mechanism and slide 7's bottom fixed connection set up, and the die cavity 13 has been seted up at the top of bed die 2, and fixed mounting has fixed pipe 14 on the bottom of die cavity 13, and wherein, fixed pipe 14 both ends are the opening setting, and the cross-section of fixed pipe 14 inner wall is the same with the cross-section size of second ejector pad 22, and is concrete, and when last mould 1 and bed die 2 were closed, fixed pipe 14's top can overlap on second ejector pad 22, realizes sealed effect.

An exhaust pipe 15 is fixedly installed at the bottom of the forming cavity 13, an air outlet 16 communicated with the bottom of the exhaust pipe 15 is formed in the lower die 2, an air inlet 17 is formed in the side wall of the exhaust pipe 15, a push plate 18 is arranged on the inner wall of the fixed pipe 14 in a sliding sealing manner, the push plate 18 is sleeved on the outer wall of the fixed pipe 14 in a sliding sealing manner, a third reset spring 30 fixedly connected and sleeved on the fixed pipe 14 in a sliding manner is fixedly connected between the bottom of the push plate 18 and the bottom of the forming cavity 13, a through hole 19 is formed in the side wall of the push plate 18, fixed blocks 20 arranged in parallel are fixedly installed on the inner wall of the fixed pipe 14, the fixed blocks 20 are arranged in sliding contact with the inner wall of the through hole 19, a vibration mechanism is fixedly installed at the top of the push plate 18, a reset mechanism fixedly connected with the vibration mechanism is installed at the top of the push plate 18, wherein the through hole 19 is, further, the fixed block 20 is provided with the multiseriate, and multiseriate fixed block 20 evenly distributed is on the inner wall of fixed pipe 14, and further, fixed block 20 is the slope setting, and is concrete, through setting up multiseriate fixed block 20, turning block 27 also is provided with the polylith simultaneously for realize with the cooperation between the multiseriate fixed block 20, realize the purpose that fixed pipe 14 multilateral was beaten, thereby improve vibrations effect.

Wherein, ejector pad mechanism includes the first ejector pad 21 that sets up with the 4 inner walls sliding seal contact of notch, and the bottom fixed mounting of first ejector pad 21 has the second ejector pad 22, has seted up same through-hole 23 on first ejector pad 21 and the second ejector pad 22, and the top fixed mounting of first ejector pad 21 has many push rods 24, and many push rods 24 all set up with the bottom fixed connection of slide 7.

It should be noted that, after the mold is opened, after the upper mold 1 and the lower mold 2 are separated, the first return spring 9 in a compressed state drives the sliding plate 7 to move downward in the second cavity 6, so as to drive the ejector pin 12 to move downward in the exhaust hole 1, and achieve the purpose of sealing the air guide hole 11 and simultaneously rapidly cleaning the plastic in the exhaust hole 10.

Wherein, vibrations mechanism includes two dead levers 25 of fixed mounting in push pedal 18 top, the same root connecting rod 26 of fixedly connected with between two dead levers 25, it is equipped with turning block 27 to rotate the cover on the connecting rod 26, turning block 27 and the setting of the contact of fixed block 20, turning block 27 and canceling release mechanical system fixed connection set up, furthermore, canceling release mechanical system includes the L template 28 of fixed mounting on push pedal 18 top, the bottom fixed mounting of L template 28 has with 27 top fixed connection's of turning block second reset spring 29.

It should be noted that, after the mold opening, when the upper mold 1 is separated from the lower mold 2, the third return spring 30 in a compressed state drives the push plate 18 to move upward to reset, and the L-shaped plate 18 has a relatively high height, so that the push plate 18 can drive the rotating block 27 to move upward when moving upward, and the rotating block 27 can rotate reversely to achieve the purpose of resetting.

In the invention, when the upper die 1 and the lower die 2 are closed, the annular block 3 at the bottom of the upper die 1 is inserted into the forming cavity 13 on the lower die 2 to play a role in promoting forming and simultaneously realize sealing, the fixed tube 14 in the forming cavity 13 upwards extrudes the second push block 22, so that the first push block 21 moves into the notch 4 to realize the sealing purpose of the notch 4, the push block 21 drives the sliding plate 7 to upwards move in the second cavity 6 through the push rod 24 to realize the purpose of extruding the first return spring 9 while driving the ejector pin 12 to upwards move, and at the moment, the exhaust hole 10 is communicated with the air guide hole 11.

Further, in the injection molding process, the air between the molding cavity 13 and the ring block 3 will enter the exhaust hole 10, and then enter the first chamber 5 through the air guide hole 11, and enter the fixed tube 14 through the through holes 19 on the first push block 21 and the second push block 22, because the internal pressure of the fixed tube 14 is increased, the push plate 18 will be pushed to move downwards, the push plate 18 will compress the third return spring 30 downwards, and at the same time, the push plate 18 will drive the rotating block 27 to move downwards through the fixed rod 25 and the connecting rod 26, so that the rotating block 27 will slide on the fixed blocks 20, during the downward movement of the rotating block 27, the rotating block 27 will be squeezed by the fixed block 20 and rotate on the connecting rod 26, at the same time, the rotating block 27 will stretch the second return spring 29, when the rotating block 27 is separated from the upper fixed block 20, and when the lower fixed block 20 moves, the second return spring 29 will pull the rotating block 27 to rotate, the purpose of knocking the next fixed block 20 is to realize the purpose of continuously knocking the fixed block 20 in the process that the rotating block 27 continuously moves downwards, so that the purpose of vibrating the fixed pipe 14 is realized, the purpose of improving the uniform speed of plastic injection molding is realized, and when the push plate 18 moves to the position below the air inlet hole 17 on the exhaust pipe 15, discharged gas enters the exhaust pipe 15 through the air inlet hole 17 and is discharged to the outside through the air outlet hole 16.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. An injection mold for producing plastic pipe joints comprises an upper mold (1) and a lower mold (2), and is characterized in that an annular block (3) is fixedly installed at the bottom of the upper mold (1), a notch (4) is formed in the bottom of the upper mold (1), the notch (4) is arranged in the middle of the annular block (3), a first cavity (5) communicated with the top of the notch (4) is formed in the upper mold (1), a second cavity (6) communicated with the top of the first cavity (5) is formed in the upper mold (1), a sliding plate (7) is arranged on the inner wall of the second cavity (6) in a sliding and sealing manner, two limiting blocks (8) are fixedly installed on the inner wall of the second cavity (6), and a plurality of first reset springs (9) are fixedly connected between the sliding plate (7) and the top of the second cavity (6), a plurality of exhaust holes (10) which are communicated with the bottom of the second cavity (6) are formed in the upper die (1), air guide holes (11) which are communicated with the side walls of the exhaust holes (10) are formed in the upper die (1), the air outlet ends of the air guide holes (11) are communicated with the side wall of the first cavity (5), a plurality of ejector pins (12) are fixedly installed at the bottom of the sliding plate (7), the ejector pins (12) are respectively inserted into the exhaust holes (10), and a push block mechanism is arranged in the notch (4) in a sliding and sealing manner;

the push block mechanism is fixedly connected with the bottom of the sliding plate (7), a forming cavity (13) is formed in the top of the lower die (2), a fixed pipe (14) is fixedly mounted on the bottom of the forming cavity (13), an exhaust pipe (15) is fixedly mounted at the bottom of the forming cavity (13), an air outlet (16) communicated with the bottom of the exhaust pipe (15) is formed in the lower die (2), an air inlet (17) is formed in the side wall of the exhaust pipe (15), a push plate (18) is arranged on the inner wall of the fixed pipe (14) in a sliding sealing manner, the push plate (18) is arranged on the outer wall of the fixed pipe (14) in a sliding sealing manner in a sealing manner, a third reset spring (30) which is sleeved on the fixed pipe (14) in a sliding manner is fixedly connected between the bottom of the push plate (18) and the bottom of the forming cavity (13), and a through hole (19) is formed in the, fixed mounting has fixed block (20) that are the setting of being listed as side by side on the inner wall of fixed pipe (14), fixed block (20) and the inner wall sliding contact setting that runs through mouth (19), the top fixed mounting of push pedal (18) has vibrations mechanism, the top fixed mounting of push pedal (18) has the canceling release mechanical system who sets up with vibrations mechanism fixed connection.

2. The injection mold for producing the plastic pipe joint as recited in claim 1, wherein the push block mechanism comprises a first push block (21) in sliding sealing contact with the inner wall of the notch (4), a second push block (22) is fixedly mounted at the bottom of the first push block (21), the first push block (21) and the second push block (22) are provided with a same through hole (23), a plurality of push rods (24) are fixedly mounted at the top of the first push block (21), and the plurality of push rods (24) are fixedly connected with the bottom of the sliding plate (7).

3. The injection mold for producing the plastic pipe joint as recited in claim 1, wherein the vibration mechanism comprises two fixing rods (25) fixedly mounted on the top of the push plate (18), a connecting rod (26) is fixedly connected between the two fixing rods (25), a rotating block (27) is rotatably sleeved on the connecting rod (26), the rotating block (27) is in contact with the fixing block (20), and the rotating block (27) is fixedly connected with the reset mechanism.

4. An injection mould for the production of plastic pipe joints according to claim 3, characterised in that the return mechanism comprises an L-shaped plate (28) fixedly mounted on the top of the push plate (18), the bottom of the L-shaped plate (28) being fixedly mounted with a second return spring (29) fixedly connected with the top of the turning block (27).

5. An injection mold for producing plastic pipe joints according to claim 2, wherein the two ends of the fixed pipe (14) are open, and the cross section of the inner wall of the fixed pipe (14) is the same as the cross section of the second push block (22).

6. An injection mold for producing plastic pipe joints as claimed in claim 1, wherein a plurality of through openings (19) are provided, and the plurality of through openings (19) are evenly distributed on the outer ring side wall of the push plate (18).

7. An injection mold for producing plastic pipe joints according to claim 1, wherein the fixing blocks (20) are provided in a plurality of rows, the plurality of rows of the fixing blocks (20) being uniformly distributed on the inner wall of the fixing pipe (14).

8. An injection mould for the production of plastic pipe joints according to claim 1, characterised in that the fixing blocks (20) are arranged obliquely.