CN111037853B

CN111037853B - Injection molding mold for spiral flow guide inner core of oxygenator

Info

Publication number: CN111037853B
Application number: CN201911380850.8A
Authority: CN
Inventors: 黄槐灵; 魏信鑫; 林伟东; 张换梅; 袁栋平
Original assignee: Dongguan Kewei Medical Instrument Co Ltd
Current assignee: Dongguan Kewei Medical Instrument Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2022-09-23
Anticipated expiration: 2039-12-27
Also published as: CN111037853A

Abstract

The invention discloses an injection molding die for a spiral flow guide inner core of an oxygenator, which comprises an upper die, a lower die and a molding mechanism, wherein the upper die is provided with a first cavity and a second cavity; the upper die and the lower die are arranged oppositely; the molding mechanism comprises an inner molding piece and an outer molding component; the inner forming piece is arranged on the lower die; the outer molding assembly is arranged on the lower die and surrounds the inner molding piece; when the upper die and the lower die are closed, the outer forming component moves towards the inner forming part, so that an injection molding space is formed between the outer forming component and the inner forming part. The injection molding die for the spiral flow guide inner core of the oxygenator is matched with the inner molding piece through the outer molding assembly, so that the annular flow guide plate with the through holes and the raised spiral ribs can be formed through one-time injection molding, secondary positioning and drilling after molding are not needed, the time consumption is short, and the production efficiency is high.

Description

Injection molding mold for spiral flow guide inner core of oxygenator

Technical Field

The invention relates to the technical field of injection molds, in particular to an injection molding mold for a spiral flow guide inner core of an oxygenator.

Background

In patent number ZL 201710817386.9 entitled "membrane oxygenator", the annular flow guide plate with a mandrel structure plays a role in flow guiding and is an important component of the oxygenator. As shown in fig. 1 and fig. 2, the annular guide plate 10 is in an annular cylinder shape, the side wall of the annular guide plate 10 has a through hole 101, the inner side wall of the annular guide plate 10 has a raised spiral rib 102, if the annular guide plate 10 is produced by injection molding through a mold and then drilling a formed part, the formed part needs to be repositioned, and because the through holes 101 are distributed in a plurality of spiral ribs 102, the time required for repositioning is very long, which results in a great reduction in production efficiency.

Disclosure of Invention

Aiming at the defects of the prior art, the invention discloses an injection molding die for a spiral flow guide inner core of an oxygenator, which comprises: an upper die, a lower die and a forming mechanism; the upper die and the lower die are arranged oppositely; the molding mechanism comprises an inner molding piece and an outer molding component; the inner forming piece is arranged on the lower die; the outer molding assembly is arranged on the lower die and surrounds the inner molding piece; when the upper die and the lower die are closed, the outer forming assembly moves towards the inner forming piece, so that an injection forming space is formed between the outer forming assembly and the inner forming piece, and the injection forming space is communicated with an injection molding channel arranged on the upper die.

According to an embodiment of the present invention, the outer surface of the inner forming member has a spiral groove; the spiral groove is communicated with the injection molding space.

According to an embodiment of the present invention, the outer forming assembly includes a moving block and a forming block; the moving block is arranged on the lower die base; the forming block is arranged on the moving block.

According to an embodiment of the present invention, the inner surface of the molding block has a convex point; when the upper die and the lower die are closed, the salient points are abutted to the outer surface of the inner forming piece.

According to an embodiment of the present invention, the outer forming assembly further includes a reset member; one end of the resetting piece is connected with the lower die holder in a butting mode, and the other end of the resetting piece is connected with the moving block in a butting mode.

According to an embodiment of the present invention, the upper mold is provided with a wedge; when the upper die and the lower die are assembled, the wedge block pushes the moving block to move towards the inner formed part.

According to an embodiment of the present invention, the injection mold for the spiral flow guiding inner core of the oxygenator further includes a demolding mechanism; the demoulding mechanism is arranged on the lower mould.

According to an embodiment of the present invention, the mold releasing mechanism includes a mold releasing sleeve and a push plate; the demoulding sleeve is sleeved on the inner forming piece; the push plate is connected with the demoulding sleeve.

According to an embodiment of the invention, one end of the demoulding sleeve, which is far away from the push plate, is provided with a convex ring; the convex ring is positioned in the injection molding space.

According to an embodiment of the present invention, the upper mold and the lower mold are provided with mold locking buckles.

The invention has the beneficial effects that: the injection molding die for the spiral flow guide inner core of the oxygenator is matched with the inner molding piece through the outer molding assembly, so that the annular flow guide plate with the through holes and the raised spiral ribs can be formed through one-time injection molding, secondary positioning and drilling after molding are not needed, the time consumption is short, and the production efficiency is high.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application in a non-limiting sense. In the drawings:

FIG. 1 is a schematic diagram of an annular baffle according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an annular baffle in an embodiment of the present invention;

FIG. 3 is a schematic structural view of an injection mold with a spiral flow guiding inner core of an oxygenator according to an embodiment of the present invention;

FIG. 4 is another schematic structural view of an injection mold with spiral flow guiding inner core for an oxygenator according to an embodiment of the present invention;

FIG. 5 is a top view of an injection mold for a spiral flow guiding inner core of an oxygenator in an embodiment of the present invention;

FIG. 6 is a sectional view A-A of an oxygenator spiral flow guiding inner core injection molding mold in an embodiment of the present invention;

FIG. 7 is a B-B cross-sectional view of an oxygenator spiral flow directing inner core injection molding mold in an embodiment of the present invention;

FIG. 8 is a C-C cross sectional view of an oxygenator spiral flow directing inner core injection molding mold in an embodiment of the present invention;

FIG. 9 is a schematic structural view of a molding mechanism according to an embodiment of the present invention;

FIG. 10 is a schematic structural view of an inner mold member in an embodiment of the present invention;

FIG. 11 is a schematic structural view of a forming block in an embodiment of the present invention;

fig. 12 is a schematic structural view of a mold-releasing mechanism in an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a stripper sleeve in an embodiment of the invention.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the present invention. It should be understood, however, that these implementation details should not be taken to limit the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

It should be noted that all directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are used for descriptive purposes only, not specifically for describing order or sequence, but also for limiting the present invention, and are used only for distinguishing components or operations described in the same technical terms, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

For a further understanding of the contents, features and effects of the present invention, the following examples are illustrated in the accompanying drawings and described in the following detailed description:

referring to fig. 3-8, fig. 3 is a schematic structural view of an injection mold with a spiral flow guiding inner core of an oxygenator according to an embodiment of the present invention; FIG. 4 is another schematic structural view of an injection mold with a spiral flow guiding inner core of an oxygenator according to an embodiment of the present invention; FIG. 5 is a top view of an injection mold for a spiral flow guiding inner core of an oxygenator in an embodiment of the present invention; FIG. 6 is a sectional view A-A of an oxygenator spiral flow guiding inner core injection molding mold in an embodiment of the present invention; FIG. 7 is a B-B cross-sectional view of an oxygenator spiral flow directing inner core injection molding mold in an embodiment of the present invention; FIG. 8 is a C-C cross sectional view of an oxygenator spiral flow guiding inner core injection molding mold in an embodiment of the present invention. As shown in the figure, the injection molding mold for the spiral flow guide inner core of the oxygenator comprises an upper mold 1, a lower mold 2, a molding mechanism 3 and a demolding mechanism 4. The upper die 1 and the lower die 2 are arranged oppositely. The molding mechanism 3 is provided on the lower mold 2. The demoulding mechanism 4 is arranged on the lower die 2, and the demoulding mechanism 4 is connected with the forming mechanism 3. During injection molding, go up

mould

1 and 2 compound dies of lower mould, after the compound die, forming mechanism 3 forms injection moulding space 300, injection moulding space 300 intercommunication sets up in the passageway 5 of moulding plastics of last mould 1, plastic solution is poured into in the injection moulding space 300 through the passageway 5 of moulding plastics, until filling up plastic solution in the injection moulding space 300, the plastic solution in solidification injection moulding space 300 is annular guide plate 10, go up

mould

1 and 2 die sinking of lower mould, forming mechanism 3 opens, demoulding mechanism 4 promotes the unloading of annular guide plate 10, take off annular guide plate 10, repeat the above-mentioned action and carry out the injection moulding of next annular guide plate 10.

Further, the upper mold 1 includes an upper plate 11, an upper pad 12, and an upper mold base 13. The upper mat 12 is provided to the upper mold plate 11. The upper die holder 13 is provided on the upper pad 12, and the upper die holder 13 has an upper cavity 131. The lower die 2 comprises a lower die plate 21, a lower cushion block 22 and a lower die base 23. The lower pad 22 is disposed on the lower plate 21. The lower die holder 23 is arranged on the lower cushion block 22, the lower die holder 23 is provided with a lower die cavity 231, the lower die cavity 231 corresponds to the upper die cavity 131, the forming mechanism 3 is arranged on the lower die holder 23, and the forming mechanism 3 is positioned in the lower die cavity 231. During injection molding, the lower die 2 is fixed at a preset position through the lower die plate 21, the external driving piece drives the upper die plate 11 to move towards the lower die plate 21, the upper die plate 11 pushes the upper die base 13 to be matched with the lower die base 23, the upper die cavity 131 is communicated with the lower die cavity 231 to form an accommodating cavity, the molding mechanism 3 is located in the accommodating cavity, the molding mechanism 3 forms an injection molding space 300, a plastic solution is injected into the injection molding space 300 through the injection molding channel 5, and the plastic solution forms the annular guide plate 10 after being cured in the injection molding space 300.

Preferably, the upper mold plate 11 is provided with a guide post 14, one end of the guide post 14 is inserted in sequence through the upper backing plate 12, the upper mold base 13, the lower mold base 23 and the lower cushion block 22, and when the mold is closed, the upper mold 1 moves along the guide post 14, so that the upper mold 1 and the lower mold 2 are ensured to be accurately closed.

Preferably, the upper die holder 13 is provided with a positioning rod, the lower die holder 23 is provided with a positioning hole 24 matched with the positioning rod in shape, and the positioning rod is inserted into the positioning hole 24 during die assembly, so that the alignment degree between the upper die holder 13 and the lower die holder 23 is ensured, and the forming precision is ensured.

Preferably, the upper mold base 13 and the lower mold base 23 are respectively provided with a mold locking plug 151 and a lock 152 of the mold locking buckle 15, when the upper mold base 13 and the lower mold base 23 are closed, the lock 152 is inserted into the mold locking plug 151, and the lock 152 is matched with the mold locking plug 151, so that the upper mold base 13 and the lower mold base 23 cannot be opened at the first time during mold opening, the mold is prevented from moving, and the positioning and protection effects on the mold are achieved.

Referring to fig. 9, 10 and 11, fig. 9 is a schematic structural view of the forming mechanism 3 according to the embodiment of the present invention; FIG. 10 is a schematic structural view of an inner molding member 31 in the embodiment of the present invention; fig. 11 is a schematic structural diagram of a molding block 322 in an embodiment of the invention. As shown in the figure, the molding mechanism 3 includes an inner molding member 31 and an outer molding member 32, and the inner molding member 31 is disposed on the lower mold 2 by a fixing screw 33. An outer molding member 32 is provided to the lower mold 2, and the outer molding member 32 surrounds the inner molding member 31. During clamping, the outer mold assembly 32 moves toward the inner mold 31, and an injection molding space 300 is formed between the outer mold assembly 32 and the inner mold 31.

Further, the outer surface of the inner forming member 31 has spiral grooves 311 arranged at intervals, the spiral grooves 311 are communicated with the injection molding space 300, so that after the plastic solution in the injection molding space 300 is solidified, the inner side wall of the annular guide plate 10 forms spiral ribs 102 matched with the shape of the spiral grooves 311.

Further, the outer molding member 32 includes a moving block 321, a molding block 322, and a returning block 323. The moving block 321 is disposed on the lower die base 23. The forming block 322 is disposed on the moving block 321, the inner surface of the forming block 322 is an arc surface, and the inner surface of the forming block 322 is provided with a protruding point 3221. One end of the reset piece 323 abuts against the lower die holder 23, the other end of the reset piece 323 abuts against the moving block 321, and the reset piece 323 is a spring.

Preferably, the outer forming assembly 32 further comprises a guide plate 324, the guide plate 324 is disposed on the lower die base 23, and the guide plate 324 is disposed on both sides of the moving block 321. The guide plate 324 plays a role in guiding the moving block 321, and ensures that the moving block 321 drives the forming block 322 to accurately move to a preset position.

During injection molding, the upper die holder 13 moves towards the lower die holder 23, the side wall of the upper die cavity 131 has a first inclined surface 1311, the moving block 321 has a second inclined surface 3211, as the upper die holder 13 continuously moves towards the lower die holder 23, the second inclined surface 3211 of the moving block 321 slides in cooperation with the first inclined surface 1311, so as to push the moving block 321 to move towards the inner molded part 31, so that an injection molding space 300 is formed between the molding block 322 and the inner molded part 31, at this time, the protruding points 3221 abut against the outer surface of the inner molded part 31, the reset part 323 is compressed, after the plastic solution is cured and molded in the injection molding space 300, the upper die holder 13 moves towards a direction away from the lower die holder 23, the reset part 323 is to recover an uncompressed state, the elastic force of the reset part 323 pushes the molding block 322 to move towards a direction away from the inner molded part 31, so as to recover the outer molding assembly 32 to an initial state.

Preferably, the moving block 321 is provided with a stop block 325. In the moving process of the moving block 321, the limiting block 325 abuts against a limiting plate 1312 arranged in the upper mold cavity 131, so that the moving block 321 is limited, the situation that the moving block 321 pushes the forming block 322 to exceed a preset moving distance is avoided, and the forming block 322 extrudes the inner formed part 31 to enable the inner formed part to deform, and the quality of an injection molding product is influenced.

In this embodiment, the number of the outer forming assemblies 32 is four, the inner surface of the forming block 322 of each outer forming assembly 32 is a 90-degree arc surface, when the molds are closed, the four forming blocks 322 synchronously move towards the inner forming member 31, the four 90-degree arc surfaces surround a 360-degree cylinder, the inner forming member 31 is wrapped in the cylinder, when the molds are opened, the four forming blocks 322 synchronously move towards the direction away from the inner forming member 31, and the forming precision is ensured; of course, the number of the outer forming assemblies 32 can be increased or decreased according to actual requirements, and the above is only one embodiment of the present invention, and should not be limited thereto.

Preferably, the upper die holder 13 is provided with a wedge block 16, the lower die holder 23 is provided with a wedge groove 25 matched with the shape of the wedge block 16, the inclined surface of the wedge block 16 and the first inclined surface 1311 are in the same plane, and the wedge block 16 extends the length of the first inclined surface 1311, so that when the die is closed, the upper die 1 is in contact with the moving block 321, and the moving block 321 is guaranteed to stably push the forming block 322 to move.

Referring to fig. 12 and 13 together, fig. 12 is a schematic structural view of the demolding mechanism 4 in the embodiment of the present invention; fig. 13 is a schematic structural view of the stripper sleeve 41 in an embodiment of the present invention. As shown in the figure, the ejector mechanism 4 includes an ejector sleeve 41, a push plate 42, and a push rod 43. The inner forming member 31 is sleeved with the mold removing sleeve 41, the mold removing sleeve 41 is located in the fixing seat 44 in the lower mold cavity 231, the mold removing sleeve 41 has a convex ring 411, and the convex ring 411 is located in the injection molding space 300. The push plate 42 is arranged on the lower template 21, one end of the push rod 43 is connected with the fixed seat 44, and the other end of the push rod 43 is connected with the push plate 42. After the plastic solution is solidified and molded in the injection molding space 300, the external driving member drives the upper mold plate 11 to move in a direction away from the lower mold plate 21, so that the upper mold base 13 is separated from the lower mold base 23, the moving block 321 drives the molding block 322 to recover to the initial position under the elastic action of the resetting member 323, then, the other external driving member drives the push plate 42 to move in a direction towards the annular guide plate 10, because the convex ring 411 is located in the injection molding space 300, one end of the molded annular guide plate 10 close to the demolding sleeve 41 is provided with a groove matched with the shape of the convex ring 411, the push plate 42 pushes the push rod 43 to push the demolding sleeve 41 to move upwards, because the inner side wall of the annular guide plate 10 is provided with the spiral rib 102, the outer surface of the internal molding member 31 is provided with the spiral groove 311, therefore, the annular guide plate 10 can rotate upwards along the spiral groove 311 to realize blanking, and the angle of the spiral groove 311 is greater than 120 degrees, the spiral rib 102 and the spiral groove 311 are not locked.

Referring to fig. 3 again, the demolding mechanism 4 further comprises a return switch 45, the return switch 45 is arranged on the lower mold plate 21, after demolding is finished, the external driving piece drives the supporting plate to recover to the initial position, the push plate 42 triggers the return switch 45, the push plate 42 is ensured to drive the push rod 43 and the demolding sleeve 41 to retreat in place, and interference between the demolding sleeve 41 and the molding mechanism 3 which cannot retreat is avoided.

In summary, in one or more embodiments of the present invention, the injection mold for the spiral flow guiding inner core of the oxygenator of the present invention is configured to cooperate with the inner molding member through the outer molding member, so that the annular flow guiding plate with the through hole and the raised spiral rib can be formed through one-step injection molding, and the hole drilling is not required to be performed after the one-step injection molding, which is short in time and high in production efficiency.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides an oxygenator spiral water conservancy diversion inner core injection moulding mould which characterized in that includes: an upper die, a lower die and a forming mechanism; the upper die and the lower die are arranged oppositely; the lower die comprises a lower die plate, a lower cushion block and a lower die base, the lower cushion block is arranged on the lower die plate, the lower die base is arranged on the lower cushion block, and the forming mechanism comprises an inner forming piece and an outer forming assembly; the inner forming piece is arranged on the lower die; the outer molding assembly is arranged on the lower die and surrounds the inner molding piece; when the upper die and the lower die are matched, the outer molding assembly moves towards the inner molding piece, so that an injection molding space is formed between the outer molding assembly and the inner molding piece; the injection molding space is communicated with an injection molding channel arranged on the upper die;

the outer surface of the inner forming piece is provided with a spiral groove; the spiral groove is communicated with the injection molding space, and the angle of the spiral groove is larger than 120 degrees;

the device also comprises a demoulding mechanism; the demolding mechanism is arranged on the lower mold; the demolding mechanism comprises a demolding sleeve, a push plate and a push rod; the demolding sleeve is sleeved on the inner forming piece; the push plate is connected with the demolding sleeve; the push rod is connected with the push plate, when the push plate is driven to move towards the direction of the annular guide plate, the push plate pushes the push rod to push the demolding sleeve to move upwards, and the demolding sleeve pushes the annular guide plate to rotate and move upwards to realize rotary blanking of the annular guide plate;

the outer forming assembly comprises a moving block, a forming block and a resetting piece; the moving block is arranged on the lower die base; the forming block is arranged on the moving block; one end of the resetting piece is abutted against the lower die holder, and the other end of the resetting piece is abutted against the moving block;

the inner surface of the molding block is provided with salient points; when the upper die and the lower die are assembled, the salient points are abutted to the outer surface of the inner forming piece.

2. The oxygenator spiral flow guide inner core injection molding mold of claim 1, wherein the upper mold is provided with a wedge block; when the upper die and the lower die are assembled, the wedge block pushes the moving block to move towards the inner forming piece.

3. The oxygenator spiral flow guide inner core injection molding mold of claim 1, wherein one end of the demolding sleeve, which is far away from the push plate, is provided with a convex ring; the convex ring is positioned in the injection molding space.

4. The injection mold with spiral flow guiding inner core of oxygenator of claim 1, wherein the upper mold and the lower mold are provided with mold locking buckles.