CN111775407A

CN111775407A - TPU air nozzle injection mold and injection molding method

Info

Publication number: CN111775407A
Application number: CN202010780627.9A
Authority: CN
Inventors: 周建区
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2020-10-16

Abstract

The invention discloses a TPU air faucet injection mold which comprises a movable mold and a fixed mold, wherein the movable mold comprises a movable mold seat, a movable mold core and a side core pulling mechanism arranged on the side edge of the movable mold core; in the die sinking process, outer core pulling seat promotes under the elastic force effect of elastic component and looses core the seat with interior and separates mutually, and interior core pulling seat still remains motionless and compresses tightly movable mould benevolence for the TPU air cock is once loosed core in the die cavity, effectively reduces the TPU air cock and to the core adhesion, consequently outer core pulling seat drives the core and when outwards removing and loosing core for the second time, can smoothly take out the core from the TPU air cock in, the drawing of patterns of being convenient for reduces drawing of patterns time, improves production efficiency.

Description

TPU air nozzle injection mold and injection molding method

Technical Field

The invention relates to TPU air nozzle production equipment, in particular to a TPU air nozzle injection mold and an injection molding method.

Background

The massage chair with the air bag massage function in the market is more and more popular at present, an air nozzle is an important component of the air bag, wherein the air bag is inflated and deflated through the air nozzle, the existing air nozzle is usually formed by injection molding of a TPU material through an injection mold, the injection molding is a processing method used in batch production of parts with complex shapes, and specifically, heated and melted plastic is injected into a mold cavity from an injection molding machine at high pressure and is cooled and solidified to obtain a formed product.

Because the air cock has the air flue structure that is used for aerifing and gassing, correspondingly, injection mold is provided with corresponding side core pulling mechanism, separate movable mould and cover half during the drawing of patterns, and once only take out side core pulling mechanism, utilize the instrument to prize from movable mould or cover half again and take out the air cock, nevertheless because of TPU rubber materials characteristic, the product texture is soft, and the product surface is smooth, and is big with mould surface adhesion, when the action is pulled out to the side, draw the deformation with the air cock easily, cause the air cock to damage easily, the drawing of patterns is long-time, low in production efficiency.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a TPU air nozzle injection mold and an injection molding method.

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

the TPU air faucet injection mold comprises a movable mold and a fixed mold, wherein the movable mold comprises a movable mold seat, a movable mold core and a side core pulling mechanism arranged on the side edge of the movable mold core, the fixed mold comprises a fixed mold seat and a fixed mold core, the side core pulling mechanism comprises an inner core pulling seat, an outer core pulling seat and a plurality of cores, one end part of each core is fixed on the outer core pulling seat, and the other end part of each core penetrates through the inner core pulling seat and is arranged on the movable mold core; the outer core pulling seat is connected with the inner core pulling seat through a first connecting assembly, a pushing elastic piece is arranged between the outer core pulling seat and the inner core pulling seat in a compression mode, and the outer core pulling seat can be separated from the inner core pulling seat under the elastic action of the pushing elastic piece when the mold is opened.

The invention further provides that: the cover half benevolence is installed on the cover half seat through the second coupling assembling, and the compression is provided with between cover half benevolence and cover half seat and compresses tightly the elastic component, and when the die sinking, the cover half benevolence can compress tightly movable mould benevolence under the elastic action that compresses tightly the elastic component.

The invention further provides that: first connecting element includes first pull rod and sets up the first counter bore on outer core pulling seat, the draw-bar head of first pull rod is arranged in first counter bore, and another tip passes first counter bore and is connected with interior core pulling seat, when outer core pulling seat and interior core pulling seat separation outwards remove to required position, make the draw-bar head of first pull rod can support and lean on in the bottom of first counter bore.

The invention further provides that: the first pull rod is a bolt, the bolt head is arranged in the first counter bore, and the screw rod penetrates through the first counter bore to be in threaded connection with the inner core-pulling seat.

The invention further provides that: the push elastic piece is a spring, a first mounting groove for mounting the spring is formed in the inner core pulling seat, one end of the push elastic piece is compressed and arranged in the first mounting groove, and the other end of the push elastic piece abuts against the outer core pulling seat.

The invention further provides that: the first connecting assembly comprises a pulling piece and a separating groove formed in the inner core pulling seat, one end of the pulling piece is fixed on the outer core pulling seat, the other end of the pulling piece is provided with a connecting part and is arranged in the separating groove, and when the outer core pulling seat and the inner core pulling seat are separated and move outwards to a required position, the connecting part can abut against the groove wall of the separating groove.

The invention further provides that: the outer core-pulling seat comprises an outer core-pulling seat main body and a connecting block used for installing and fixing the core, and the connecting block is embedded in the outer core-pulling seat main body.

The invention further provides that: the second connecting assembly comprises a second pull rod and a second counter bore formed in the fixed die base, the pull rod head of the second pull rod is arranged in the second counter bore, the other end of the second pull rod penetrates through the second counter bore to be connected with the inner core-pulling base, the fixed die core and the fixed die base are separated and move forwards to a required position, and the pull rod head of the second pull rod can abut against the bottom of the second counter bore.

The invention further provides that: the pressing elastic piece is a spring, a second mounting groove for mounting the spring is formed in the fixed die holder, one end of the pressing elastic piece is arranged in the second mounting groove in a compressed mode, and the other end of the pressing elastic piece abuts against the fixed die core.

The invention also provides a TPU air nozzle injection molding method, which adopts the TPU air nozzle injection mold and comprises the following steps:

s1, mold closing: the movable die moves towards the fixed die, so that the movable die core, the fixed die core and the side core-pulling mechanism are matched with each other to form a cavity;

s2, injecting glue: injecting glue into the cavity after the die assembly, and maintaining the pressure and cooling;

s3, opening the mould: when the plastic injected into the cavity is cooled and formed, the movable mold is pushed to move away from the fixed mold, the fixed mold core still compresses the movable mold core under the action of the elastic force of the compression elastic piece, and meanwhile, the outer core pulling seat pushes the elastic piece to separate from the inner core pulling seat under the action of the elastic force of the elastic piece, so that the core is driven to move outwards to perform first core pulling, and the inner core pulling seat still keeps still to compress the movable mold core, so that the core and the TPU air faucet relatively move;

the movable mould is pushed to move continuously in the direction away from the fixed mould, the fixed mould core does not move forwards under the action of the second connecting assembly, the fixed mould core is separated from the movable mould core, and meanwhile, the outer core pulling seat drives the core to move outwards to perform secondary core pulling, so that the core is pulled out from the TPU air nozzle, and the outer core pulling seat drives the inner core pulling seat to move outwards together through the first connecting assembly, so that the inner core pulling seat is separated from the movable mould core;

s4, taking materials: and taking down the formed TPU air nozzle from the driven die core.

The invention has the beneficial effects that: the inner core-pulling seat and the outer core-pulling seat are arranged on the movable die seat in a sliding mode, the inner core-pulling seat and the outer core-pulling seat are connected through the first connecting assembly, in the die sinking process, the outer core-pulling seat pushes the elastic piece to separate from the inner core-pulling seat under the elastic action, the inner core-pulling seat still keeps still pressing the movable die core tightly, the TPU air nozzle is made to loose core once in the die cavity, the core can not move relative to the TPU air nozzle under the condition that the TPU air nozzle is pulled and deformed, the adhesion force of the TPU air nozzle to the core is effectively reduced, and therefore when the outer core-pulling seat drives the core to move outwards to perform secondary core pulling, the core can be smoothly pulled out from the TPU air nozzle, the phenomenon that the TPU air nozzle is pulled and deformed due to the overlarge adhesion force of the TPU air nozzle core is avoided, the demolding is facilitated, the demolding time.

Drawings

FIG. 1 is a schematic structural diagram of a TPU air nozzle injection mold of the present invention;

FIG. 2 is an exploded view of a TPU air nozzle injection mold of the present invention;

FIG. 3 is a schematic structural diagram of a movable mold and a side core-pulling mechanism;

FIG. 4 is a schematic structural view of an outer core-pulling seat;

FIG. 5 is a schematic structural view of the side core pulling mechanism completing a first core pulling operation;

FIG. 6 is a schematic structural view of the side core pulling mechanism completing a second core pulling operation;

FIG. 7 is a cross-sectional view of a TPU air nozzle injection mold of the invention;

FIG. 8 is a first schematic structural diagram of a fixed mold;

FIG. 9 is a second schematic structural diagram of the stationary mold;

fig. 10 is a schematic structural view illustrating the cavity insert being outwardly sprung by the elastic force of the pressing elastic member.

Fig. 11 is a schematic structural view of a side core pulling mechanism according to another embodiment of the present disclosure;

fig. 12 is an enlarged view of a portion a in fig. 11.

Description of reference numerals: 1. moving the mold; 11. a movable die holder; 111. a guide chute; 12. a movable mould core; 2. fixing a mold; 21. fixing a die holder; 211. a second mounting groove; 22. fixing a mold core; 23. a second connection assembly; 231. a second pull rod; 232. a second counterbore; 24. compressing the elastic piece; 3. A side core-pulling mechanism; 31. an inner core-pulling seat; 311. a first mounting groove; 32. an outer core-pulling seat; 321. An outer core-pulling seat main body; 322. connecting blocks; 323. a guide projection; 33. a core; 34. a first connection assembly; 341. a first pull rod; 342. a first counterbore; 35. pushing the elastic member; 36. A first connection assembly; 361. a pull tab; 362. a separation tank; 363. a connecting portion; 4. TPU air cock.

Detailed Description

The TPU air nozzle injection mold of the present invention will be described in further detail with reference to fig. 1 to 12.

From fig. 1 and fig. 2, a TPU air cock injection mold, including movable mould 1 and cover half 2, movable mould 1 includes movable mould base 11, movable mould benevolence 12 and sets up the side mechanism of loosing core 3 at the side of movable mould benevolence 12, cover half 2 includes cover half base 21 and cover half benevolence 22, side mechanism of loosing core 3 includes interior core seat 31, outer core seat 32 and a plurality of core 33, a tip of core 33 is fixed at outer core seat 32, and another tip passes interior core seat 31 and arranges in on movable mould benevolence 12, wherein installs guide pillar and guide pin bushing respectively at movable mould base 11 and cover half 21, realizes the accurate compound die of movable mould 1 and cover half 2 and the die sinking, still installs oblique guide pillar on cover half base 21, is used for providing the required power of the side mechanism of loosing core 3 side direction of loosing core, movable mould 1 can take side mechanism of loosing core 3 to link when moving back and forth relative to cover half 2.

As can be seen from fig. 3 and 3, the inner core pulling seat 31 and the outer core pulling seat 32 are both slidably disposed on the movable mold base 11, wherein the outer core pulling seat 32 is connected to the inner core pulling seat 31 through a first connecting component 34, and a pushing elastic component 35 is disposed between the outer core pulling seat 32 and the inner core pulling seat 31 in a compressing manner; the outer core pulling seat 32 is separated from the inner core pulling seat 31 under the action of the elastic force of the pushing elastic member 35, the first connecting assembly 34 includes a first pull rod 341 and a first counter bore 342 formed in the outer core pulling seat 32, one end of the first pull rod 341 is disposed in the first counter bore 342, the other end passes through the first counter bore 342 and is connected with the inner core pulling seat 31, when the outer core pulling seat 32 moves outwards under the action of the inclined guide pillar to perform the side core pulling process, the outer core pulling seat 32 is separated from the inner core pulling seat 31 under the action of the elastic force of the pushing elastic member 35, so as to drive the core 33 to perform the first core pulling process as shown in fig. 5, at this time, the inner core pulling seat 31 remains still in cooperation with the movable core insert 12, one end of the first pull rod 341 moves towards the bottom of the first counter bore 342, when the outer core pulling seat 32 is separated from the inner core pulling seat 31 to a required distance, a pull head of the first pull rod 341 abuts against the bottom of the first counter bore 342, so as to limit the movement of the outer core pulling seat 32 relative to the inner core pulling seat 31, at this time, the outer core pulling seat 32 can pull the inner core pulling seat 31 through the first pulling rod 341 to move outwards together to separate from the movable mold core 12, and drive the core 33 to perform the second core pulling, as shown in fig. 6.

In order to adjust the installation position of the first pull rod 341 to adjust the separation distance between the outer core pulling seat 32 and the inner core pulling seat 31, the first pull rod 341 may be a bolt, wherein a bolt head is disposed in the first counterbore 342, the screw rod passes through the first counterbore 342 and is in threaded connection with the inner core pulling seat 31, and the bolt is rotated to adjust the distance between the bolt head and the bottom of the first counterbore 342, so as to adjust the maximum distance of relative movement between the outer core pulling seat 32 and the inner core pulling seat 31.

The pushing elastic part 35 is a spring, the inner core pulling seat 31 is provided with a first mounting groove 311 for mounting the spring, one end of the pushing elastic part 35 is compressed and arranged in the first mounting groove 311, the other end of the pushing elastic part abuts against the outer core pulling seat 32, the compression amount of the spring is larger than the maximum distance of relative movement between the outer core pulling seat 32 and the inner core pulling seat 31, and therefore the pushing elastic part 35 can provide enough elasticity for the outer core pulling seat 32.

Move die holder 11 and set up direction spout 111, the lateral wall of outer core pulling seat 32 sets up the direction lug 323 of direction spout 111 looks adaptation, outer core pulling seat 32 can be followed direction spout 111 and removed for outer core pulling seat 32 slides more accurately and reliably, outer core pulling seat 32 includes outer core pulling seat main part 321 and is used for the connecting block 322 of the fixed core 33 of installation, connecting block 322 is inlayed on outer core pulling seat main part 321 for connecting block 322 and outer core pulling seat main part 321 can adopt two kinds of different materials to make, effectively practices thrift manufacturing cost.

As can be seen from fig. 7, 8 and 9, the fixed mold core 22 is mounted on the fixed mold base 21 through a second connecting assembly 23, and a pressing elastic member 24 is compressed between the fixed mold core 22 and the fixed mold base 21; the fixed mold core 22 can press the movable mold core 12 under the action of the elastic force of the pressing elastic member 24 as shown in fig. 10, the second connecting assembly 23 includes a second pull rod 231 and a second counter bore 232 arranged on the fixed mold base 21, one end of the second pull rod 231 is arranged in the second counter bore 232, the other end of the second pull rod 231 passes through the second counter bore 232 to be connected with the inner core-pulling base 31, when the movable mold 1 moves away from the fixed mold 2 to open the mold, the fixed mold core 22 can still be matched with the movable mold core 12 under the action of the elastic force of the pressing elastic member 24, so that the TPU air nozzle 4 is still in the molding cavity, the core 33 is effectively prevented from drawing and deforming the TPU air nozzle 4 in the core-pulling process, one end of the second pull rod 231 can move towards the bottom of the second counter bore 232, when one end of the second pull rod 231 abuts against the bottom of the second counter bore 232, the core 33 completes the core-pulling action, and the second pull rod 231 can, so that the core insert 22 is separated from the core insert 12.

The pressing elastic piece 24 is a spring, the fixed die holder 21 is provided with a second mounting groove 211 for mounting the spring, one end of the pressing elastic piece 24 is compressed and placed in the second mounting groove 211, the other end of the pressing elastic piece abuts against the fixed die core 22, and the compression amount of the spring is larger than the maximum distance of relative movement between the fixed die holder 21 and the fixed die core 22, so that the pressing elastic piece 24 can provide enough elasticity for the fixed die core 22.

According to the invention, the inner core pulling seat 31 and the outer core pulling seat 32 are both arranged on the movable mold base 11 in a sliding manner, and the inner core pulling seat 31 and the outer core pulling seat 32 are connected through the first connecting component 34, so that the fixed mold core 22 can still be matched with the movable mold core 12 under the action of the elastic force of the pressing elastic component 24 in the process of opening the mold when the movable mold 1 moves away from the fixed mold 2; outer core pulling seat 32 promotes under the elastic force effect of elastic component 35 with interior core pulling seat 31 phase separation and interior core pulling seat 31 still keeps motionless compressing tightly movable mould benevolence 12 for TPU air cock 4 looses the core for the first time in the die cavity, make core 33 can not with TPU air cock 4 relative movement under the deformation circumstances of TPU air cock 4 pull, effectively reduce TPU air cock 4 to core 33 adhesion, consequently outer core pulling seat 32 drives core 33 and when outwards moving and loosing core for the second time, can smoothly take core 33 out from TPU air cock 4 in, can not because TPU air cock 4 is too big to core 33 adhesion, and lead to TPU air cock 4 pull to warp, the drawing of patterns of being convenient for reduces the drawing of patterns time, improves production efficiency.

The present invention further provides another embodiment, which is different from the above technical solutions in the structure of the first connecting assembly, and as can be seen from fig. 11 and 12, the first connecting assembly 36 of this embodiment includes a pull tab 361 and a separating groove 362 formed on the inner core-pulling seat 31, one end of the pull tab 361 is fixed on the outer core-pulling seat 32 by being embedded, and the other end is provided with a connecting portion 363 and is disposed in the separating groove 362, the connecting portion 363 is capable of moving back and forth in the separating groove 362, when the outer core-pulling seat 32 is separated from the inner core-pulling seat 31 and moves outward to a desired position, the connecting portion 363 is abutted against a groove wall of the separating groove 362 to limit the movement of the outer core-pulling seat 32 relative to the inner core-pulling seat 31, and at this time, the outer core-pulling seat 32 can pull the inner core-pulling seat 31 through the pull tab 361 to move outward together to separate from the movable mold core 12, so as.

The invention also provides a TPU air faucet 4 injection molding method, which adopts the TPU air faucet 4 injection mold and comprises the following steps:

s1, mold closing: the movable die 1 moves towards the fixed die 2, so that the movable die core 12, the fixed die core 22 and the side core-pulling mechanism 3 are matched with each other to form a die cavity;

s3, opening the mould: when the plastic injected into the cavity is cooled and formed, the movable mold 1 is pushed to move away from the fixed mold 2, the fixed mold core 22 still compresses the movable mold core 12 under the action of the elastic force of the compression elastic piece 24, and meanwhile, the outer core pulling seat 32 pushes the elastic piece 35 to separate from the inner core pulling seat 31 under the action of the elastic force, so that the core 33 is driven to move outwards to perform first core pulling, and the inner core pulling seat 31 still keeps motionless to compress the movable mold core 12, so that the core 33 and the TPU air nozzle 4 move relatively;

the moving die 1 is pushed to move continuously in the direction away from the fixed die 2, the fixed die core 22 does not move forwards under the action of the second connecting assembly 23, the fixed die core 22 is separated from the moving die core 12, meanwhile, the outer core pulling seat 32 drives the core 33 to move outwards to perform secondary core pulling, so that the core 33 is pulled out from the TPU air nozzle 4, and the outer core pulling seat 32 drives the inner core pulling seat 31 to move outwards together through the first connecting assembly 34, so that the inner core pulling seat 31 is separated from the moving die core 12;

s4, taking materials: and taking the formed TPU air nozzle 4 off the movable die core 12.

Through the TPU air nozzle 4 injection molding method, the TPU air nozzle 4 is subjected to core pulling for the first time in the cavity, the core 33 can not move relative to the TPU air nozzle 4 under the condition that the TPU air nozzle 4 is pulled and deformed, the adhesion force of the TPU air nozzle 4 to the core 33 is effectively reduced, and therefore when the core 33 is driven by the outer core pulling seat 32 to move outwards to perform core pulling for the second time, the core 33 can be smoothly pulled out from the TPU air nozzle 4, the demolding is facilitated, the demolding time is shortened, and the production efficiency is improved.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a TPU air cock injection mold, includes movable mould and cover half, the movable mould includes movable mould base, movable mould benevolence and sets up the side mechanism of loosing core at the side of movable mould benevolence, the cover half includes the cover half base and the cover half benevolence, characterized by:

the side core-pulling mechanism comprises an inner core-pulling seat, an outer core-pulling seat and a plurality of cores, one end part of each core is fixed on the outer core-pulling seat, and the other end part of each core penetrates through the inner core-pulling seat and is arranged on the movable mould core;

the outer core pulling seat is connected with the inner core pulling seat through a first connecting assembly, a pushing elastic piece is arranged between the outer core pulling seat and the inner core pulling seat in a compression mode, and the outer core pulling seat can be separated from the inner core pulling seat under the elastic action of the pushing elastic piece when the mold is opened.

2. The TPU air tap injection mold of claim 1, which is characterized in that: the cover half benevolence is installed on the cover half seat through the second coupling assembling, and the compression is provided with between cover half benevolence and cover half seat and compresses tightly the elastic component, and when the die sinking, the cover half benevolence can compress tightly movable mould benevolence under the elastic action that compresses tightly the elastic component.

3. The TPU air tap injection mold of claim 1, which is characterized in that: first connecting element includes first pull rod and sets up the first counter bore on outer core pulling seat, the draw-bar head of first pull rod is arranged in first counter bore, and another tip passes first counter bore and is connected with interior core pulling seat, when outer core pulling seat and interior core pulling seat separation outwards remove to required position, make the draw-bar head of first pull rod can support and lean on in the bottom of first counter bore.

4. The TPU air tap injection mold of claim 3, which is characterized in that: the first pull rod is a bolt, the bolt head is arranged in the first counter bore, and the screw rod penetrates through the first counter bore to be in threaded connection with the inner core-pulling seat.

5. The TPU gas nozzle injection mold of claim 1, 2, 3 or 4, wherein: the push elastic piece is a spring, a first mounting groove for mounting the spring is formed in the inner core pulling seat, one end of the push elastic piece is compressed and arranged in the first mounting groove, and the other end of the push elastic piece abuts against the outer core pulling seat.

6. The TPU air tap injection mold of claim 1, which is characterized in that: the first connecting assembly comprises a pulling piece and a separating groove formed in the inner core pulling seat, one end of the pulling piece is fixed on the outer core pulling seat, the other end of the pulling piece is provided with a connecting part and is arranged in the separating groove, and when the outer core pulling seat and the inner core pulling seat are separated and move outwards to a required position, the connecting part can abut against the groove wall of the separating groove.

7. The TPU gas nozzle injection mold of claim 1, 2, 3 or 4, wherein: the outer core-pulling seat comprises an outer core-pulling seat main body and a connecting block used for installing and fixing the core, and the connecting block is embedded in the outer core-pulling seat main body.

8. The TPU air tap injection mold of claim 2, which is characterized in that: the second connecting assembly comprises a second pull rod and a second counter bore formed in the fixed die base, the pull rod head of the second pull rod is arranged in the second counter bore, the other end of the second pull rod penetrates through the second counter bore to be connected with the inner core-pulling base, the fixed die core and the fixed die base are separated and move forwards to a required position, and the pull rod head of the second pull rod can abut against the bottom of the second counter bore.

9. The TPU air tap injection mold of claim 2 or 8, which is characterized in that: the pressing elastic piece is a spring, a second mounting groove for mounting the spring is formed in the fixed die holder, one end of the pressing elastic piece is arranged in the second mounting groove in a compressed mode, and the other end of the pressing elastic piece abuts against the fixed die core.

10. A TPU gas nozzle injection molding method, characterized in that the TPU gas nozzle injection mold according to any one of claims 1 to 9 is adopted, comprising the steps of: