CN105906859A - Large flap valve water gate rubber sealing part and preparation method thereof - Google Patents
Large flap valve water gate rubber sealing part and preparation method thereof Download PDFInfo
- Publication number
- CN105906859A CN105906859A CN201610410524.7A CN201610410524A CN105906859A CN 105906859 A CN105906859 A CN 105906859A CN 201610410524 A CN201610410524 A CN 201610410524A CN 105906859 A CN105906859 A CN 105906859A
- Authority
- CN
- China
- Prior art keywords
- sealing member
- lower floor
- parts
- flap valve
- upper strata
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/108—Special methods for making a non-metallic packing
Abstract
The invention provides a large flap valve water gate rubber sealing part and a preparation method thereof and belongs to the technical field of sealing materials. The rubber sealing part is wholly in a strip shape. The section of the rubber sealing part is formed by compounding a lower-layer sealing part body located on one side of the rubber sealing part and an upper-layer sealing part body located on the other side of the rubber sealing part. The Shore hardness of the lower-layer sealing part body is larger than that of the upper-layer sealing part body. The elongation at break of the lower-layer sealing part body is smaller than that of the upper-layer sealing part body. By means of a double-working-face type design structure, two working faces achieve a good buffer effect when a flap valve falls and achieve a good sealing effect in a work state.
Description
Technical field
The invention provides a kind of large-scale flap valve rubber sealing element for water gate and preparation method thereof, belong to encapsulant technology neck
Territory.
Background technology
In recent years, as the shortage of the water of human survival life line, the Important Problems of new century global concern is had become as
One of.For water resources ownership per capita is only accounted for China of world average level about 1/4, especially prominent, country and ought be very
Paying attention to problem and the water conservancy working of water, water resource has been that the strategic resource water conservancy construction affecting national development and safety is put
The first place of capital construction.Sluice sealing member is an important component part in water conservancy construction, is to ensure that the airtight water shutoff of gate is normal
The good Jeakage through Sluice Sealant of critical component run should have that relative cost is low, simple in construction, operation are easy and simple to handle, sealing effectiveness
The advantages such as good, safety, length in service life, coefficient of friction are low, will realize this effect, the structure of sealing member, materials and preparation method
The most crucial, the most domestic common rubber seal still suffers from defect at above several aspects, and technology is the weakest, need to enter
One step improves.
Summary of the invention
It is an object of the invention to: providing the rubber seal of a kind of large-scale flap valve sluice, this sealing member needs have sealing
Effective, the advantage of life-span length.
Technical scheme is:
First aspect:
One is applied to large-scale flap valve rubber sealing element for water gate, generally bar shaped, and its cross section is by being positioned at rubber seal side
Lower floor's sealing member and the upper strata sealing member of opposite side be formed by connecting；The shore hardness of the material of lower floor's sealing member is more than upper strata
The shore hardness of sealing member, and the elongation rate of tensile failure of the material of lower floor's sealing member is less than the elongation rate of tensile failure of upper strata sealing member.
The technical parameter of the material of the rubber that lower floor's sealing member is used is: hardness: 65 ± 5 continue your A, stretch breaking strength >=
22MPa, elongation rate of tensile failure >=450%.
The technical parameter of the material of the rubber that upper strata sealing member is used is: hardness 45 ± 5 continues your A, stretch breaking strength >=
18MPa, elongation rate of tensile failure >=600%.
In the direction of upper strata sealing member lower floor's sealing member dorsad, it is provided with at least one protruding.
The direction of upper strata sealing member lower floor's sealing member dorsad is provided with at least one first protruding and at least one the
Two is protruding, and first projection area on rubber seal cross section is more than second projection area on cross section.
Second projection position on rubber seal cross section is in the first projection position on rubber seal cross section
Side.
Lower floor's sealing member is additionally provided with installing hole.
Second aspect:
The preparation method of above-mentioned rubber seal, comprises the steps:
A) upper strata sealing member is prepared；
B) lower floor's sealing member is prepared；
C) with the reserved joint on lower floor sealing member, upper strata sealing member is mutually added thermally coupled to fix.
Described step a and step b all include vulcanisation step.
In the constituent of described upper strata sealing member, include following component by weight: natural rubber: 100
Part；Vulcanizing agent: 2～3 parts；Accelerator: 1～1.5 part；Zinc oxide: 4～6 parts；Stearic acid: 2～3 parts；White carbon black: 15～25 parts；Anti-
Old agent: 3.5～4.5 parts；Softening agent: 5～10 parts.
In the constituent of described lower floor's sealing member, include following component by weight: natural rubber: 100
Part；Vulcanizing agent: 2～3 parts；Accelerator: 1～1.5 part；Zinc oxide: 4～6 parts；Stearic acid: 2～3 parts；White carbon black: 45～55 parts；Anti-
Old agent: 3.5～4.5 parts；Softening agent: 2～5 parts.
Described white carbon black refers to N330 white carbon black.
Described vulcanizing agent is sulfur or its predispersion；Accelerator is 2-benzothiazolyl mercaptan, diphenyl disulfide thiophene
One of which in azoles or a combination thereof；Age resistor is one or a combination thereof of antioxidant 4010NA, antioxidant d or paraffin, softens
Agent is machine oil.
In the preparation method of upper strata sealing member and lower floor's sealing member, all comprise the following steps that the 1st step: at natural rubber
In, add zinc oxide, stearic acid, N330 white carbon black, age resistor, softening agent by mixing prepared elastomeric compound；2nd step: by elastomeric compound
In add vulcanizing agent, accelerator and i.e. obtain sizing material；3rd step: by above-mentioned sizing material back mixing, preforming, obtain the sizing material of preforming；The
4 steps: the sizing material of above-mentioned preforming is put into mould, vulcanize at vulcanizing press or drum vulcanizer, to obtain final product.
The third aspect:
The above-mentioned fluid conveying equipment being applied to large-scale flap valve rubber sealing element for water gate is installed.
Beneficial effect
The present invention is unique because of moulding, selected material, uses unique materials of soft lower hard structure, and upper strata employing flexible glue material can
To play effective cushioning effect when flap valve falls, good springiness more can effectively play sealing function, but because of current, hydraulic pressure relatively
Greatly, water cannot be stopped by first completely, so use the harder material of the second, in big hydraulic pressure and the to a certain degree depth of water
Under the conditions of can well water be stopped, accomplish watertight.Double sealing structure more can strengthen the protection to water resource, sufficiently achieves
The purpose of energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of the rubber sealing element for water gate that the present invention provides；
Fig. 2 is the schematic cross-section in the water hole being provided with rubber seal；
Fig. 3 is the side sectional view in the water hole being mounted with rubber seal.
Wherein, 1, lower floor's sealing member；2, upper strata sealing member；3, first is protruding；4, second is protruding；5, installing hole；6, water hole；
7, rubber seal.
Detailed description of the invention
Embodiment 1
The rubber seal main body that the present invention provides is strip, and it can be installed on the surrounding of the runner such as water hole, gate equipment, rises
To the effect sealed；The structure in its cross section is as shown in fig. 1: sealing member is the lower floor's sealing member 1 by the left side in Fig. 1 and figure
In 1, the upper strata sealing member 2 on right side is connected with each other and forms；Under normal circumstances, lower floor's sealing member 1 is being installed on towards gate, water hole
Deng the side of equipment, and being fixed on these water seals equipment, and upper strata sealing member 2 is towards outside, outside seal arrangement will
Fit on upper strata sealing member 2.
The design concept of the present invention is mainly: the rubber that lower floor's sealing member 1 is used belongs to the class that hardness is higher, and on
The rubber hardness that layer sealing member 2 is used is less, and elasticity is bigger.When the materials of the uniqueness using upper soft lower hard structure, on
Layer uses flexible glue material can play effective cushioning effect when flap valve falls, and good springiness more can effectively play sealing function, but
Because current, hydraulic pressure are relatively big, water cannot be stopped by first completely, so the material using the second harder seals for lower floor
Part, at big hydraulic pressure and to a certain degree well can stop water under conditions of the depth of water, play preferable sealing effectiveness.Use solely
Special R type design structure, two seal aspect, serve good cushioning effect when flap valve falls, time in working order again
Serve good sealing function.Lower floor's sealing member 1 is additionally provided with installing hole 5, for sealing member being fixed on sealing dress
Put.
In certain embodiments, the important technological parameters of the material of the rubber that lower floor's sealing member 1 is used is: hardness: 65
± 5 continue your A, stretch breaking strength >=22MPa, elongation rate of tensile failure >=450%.The important technological parameters of upper strata sealing member 2 is: hardness 45
± 5 continue your A, stretch breaking strength >=18MPa, elongation rate of tensile failure >=600%.
In certain embodiments, for upper strata sealing member 2, its structure can be improved further, carries on the back at upper strata sealing member 2
To the direction of lower floor's sealing member 1, it is provided with at least one protruding, owing to the elasticity of upper strata sealing member 2 is preferable, therefore when being provided with
After projection, after the extruding of sluice, projection can occur the most significantly to deform, and plays preferably buffering and gluing, sealing
The effect in face, makes deformation buffer, sealing effectiveness more preferable.
In certain embodiments, the direction of upper strata sealing member 2 lower floor's sealing member 1 dorsad is provided with at least one first
Protruding 3 are more than the second projection 4 in cross section with at least one second projection 4, first projection 3 area on rubber seal cross section
On area, other second projection 4 position on rubber seal cross section is in the first projection 3 in rubber seal cross section
The side of upper position.Such shape is used to be mainly designed in order to when sluice bat is together in time on rubber seal, convex by first
Play 3 and play main cushioning effect, and the edge of sluice can be carried out elastic inclusion by the second projection 4, after compressing, by the
The surrounding of sluice can preferably be sealed by two projections 4, plays better seal and buffering effect.
As in figure 2 it is shown, the rubber seal 7 that the present invention provides is overall as bar shaped, it is installed on the surrounding in water hole 6, installs
The side view in face is as it is shown on figure 3, lower floor's sealing member 1 is connected to a fixed with water hole 6, and upper strata sealing member 2 is towards outside, namely
The direction of sluice flap valve, when flap valve closes, is adjacent on upper strata sealing member 2.
Embodiment 2
The present embodiment is for illustrating composition and the preparation method of encapsulant.
The material of upper strata sealing member:
Natural rubber: 100 weight portions；
Vulcanizing agent: 3 weight portions；
Accelerator: 1.5 weight portions；
Zinc oxide: 6 weight portions；
Stearic acid: 3 weight portions；
N330 white carbon black: 25 weight portions；
Age resistor: 4.5 weight portions；
Softening agent: 10 weight portions.
The material of lower floor's sealing member:
Natural rubber: 100 weight portions；
Vulcanizing agent: 3 weight portions；
Accelerator: 1.5 weight portions；
Zinc oxide: 6 weight portions；
Stearic acid: 3 weight portions；
N330 white carbon black: 55 weight portions；
Age resistor: 4.5 weight portions；
Softening agent: 5 weight portions.
Described vulcanizing agent is sulfur；Accelerator is 2-benzothiazolyl mercaptan；Age resistor is antioxidant 4010NA, softening agent
For machine oil.
The preparation process of the encapsulant of above the upper and lower is for separately to carry out, and upper and lower layer sealing member step is all:
1st step: in natural rubber, adds zinc oxide, stearic acid, N330 white carbon black, age resistor, softening agent by mixing prepared mixed
Refining glue；2nd step: i.e. obtain sizing material by adding vulcanizing agent, accelerator in elastomeric compound；3rd step: by above-mentioned sizing material back mixing, preforming,
Obtain the sizing material of preforming；4th step: the sizing material of above-mentioned preforming is put into mould, enters at vulcanizing press or drum vulcanizer
Row sulfuration, to obtain final product.
In above-mentioned mould, all reserved joint on sizing material, reserves joint by upper and lower layer sealing member after being completed by preparation
After mutually adding thermally coupled, form all-in-one-piece sealing member.
Embodiment 3
The present embodiment is for illustrating composition and the preparation method of encapsulant.
The material of upper strata sealing member:
Natural rubber: 100 weight portions；
Vulcanizing agent: 2 weight portions；
Accelerator: 1 weight portion；
Zinc oxide: 4 weight portions；
Stearic acid: 2 weight portions；
N330 white carbon black: 15 weight portions；
Age resistor: 3.5 weight portions；
Softening agent: 5 weight portions.
The material of lower floor's sealing member:
Natural rubber: 100 weight portions；
Vulcanizing agent: 2 weight portions；
Accelerator: 1 weight portion；
Zinc oxide: 4 weight portions；
Stearic acid: 2 weight portions；
N330 white carbon black: 45 weight portions；
Age resistor: 3.5 weight portions；
Softening agent: 2 weight portions.
Described vulcanizing agent is sulfur；Accelerator is 2-benzothiazolyl mercaptan；Age resistor is antioxidant 4010NA, softening agent
For machine oil.
The preparation process of the encapsulant of above the upper and lower is for separately to carry out, and upper and lower layer sealing member step is all:
1st step: in natural rubber, adds zinc oxide, stearic acid, N330 white carbon black, age resistor, softening agent by mixing prepared mixed
Refining glue；2nd step: i.e. obtain sizing material by adding vulcanizing agent, accelerator in elastomeric compound；3rd step: by above-mentioned sizing material back mixing, preforming,
Obtain the sizing material of preforming；4th step: the sizing material of above-mentioned preforming is put into mould, enters at vulcanizing press or drum vulcanizer
Row sulfuration, to obtain final product.
In above-mentioned mould, all reserved joint on sizing material, reserves joint by upper and lower layer sealing member after being completed by preparation
After mutually adding thermally coupled, form all-in-one-piece sealing member.
Embodiment 4
The present embodiment is for illustrating composition and the preparation method of encapsulant.
The material of upper strata sealing member:
Natural rubber: 100 weight portions；
Vulcanizing agent: 2 weight portions；
Accelerator: 1 weight portion；
Zinc oxide: 4 weight portions；
Stearic acid: 2 weight portions；
Modified N330 white carbon black: 15 weight portions；
Age resistor: 3.5 weight portions；
Softening agent: 5 weight portions.
The material of lower floor's sealing member:
Natural rubber: 100 weight portions；
Vulcanizing agent: 2 weight portions；
Accelerator: 1 weight portion；
Zinc oxide: 4 weight portions；
Stearic acid: 2 weight portions；
N330 white carbon black: 45 weight portions；
Age resistor: 3.5 weight portions；
Softening agent: 2 weight portions.
Described vulcanizing agent is sulfur；Accelerator is 2-benzothiazolyl mercaptan；Age resistor is antioxidant 4010NA, softening agent
For machine oil.
The preparation process of modified N330 white carbon black: by 50g N330 white carbon black, 350mLCH2O solution (mass fraction 33%) and
The NaOH solution (catalyst) of the 0.1mol/L of 50mL joins in 1000mL there-necked flask, heating in water bath, is warming up to 50 DEG C instead
Answer 1h, repeatedly washing filtering, filter cake 50 DEG C be vacuum dried 24h, referred to as methylol white carbon black, then by 10g methylol white carbon black, 5g pair
The methanol aqueous solution of the 50vol% of phenolsulfonic acid and 500ml and the NaOH solution of 50mL0.1mol/L, join 1000mL tri-mouthfuls
In flask, heating in water bath, it is warming up to 90 DEG C of reaction 5h, is washed with deionized 3 times, filters, be dried at 100 DEG C, changed
Property N330 white carbon black.
The preparation process of the encapsulant of above the upper and lower is for separately to carry out, and upper and lower layer sealing member step is all:
1st step: in natural rubber, adds zinc oxide, stearic acid, N330 white carbon black, age resistor, softening agent by mixing prepared mixed
Refining glue；2nd step: i.e. obtain sizing material by adding vulcanizing agent, accelerator in elastomeric compound；3rd step: by above-mentioned sizing material back mixing, preforming,
Obtain the sizing material of preforming；4th step: the sizing material of above-mentioned preforming is put into mould, enters at vulcanizing press or drum vulcanizer
Row sulfuration, to obtain final product.
In above-mentioned mould, all reserved joint on sizing material, reserves joint by upper and lower layer sealing member after being completed by preparation
After mutually adding thermally coupled, form all-in-one-piece sealing member.
The above-mentioned upper and lower layer sealing member prepared, and the sample physical property of integral seal is as follows,
As can be seen from the above table, the fluid sealant of the preparation-obtained levels of the present invention has different physical properties, mainly
It is to be embodied in upper strata sealing member there is preferable elongation at break and less hardness, and the sealant material of lower floor has bigger
Hardness and less elongation at break.For integrated connection and the elastic performance of test sizing further, also carry out close
Sealing entirety elongation at break is tested, it is simply that both sides near upper-lower seal part junction point intercept out the entirety including junction point
Testing bar, the global shape of testing bar is prepared according to elongation at break method, in example 4, by sealing upper strata
To carbon black modified in glue, the intensity that upper and lower layer sizing connects the percentage elongation improving integral seal can be improved on the whole.
Claims (10)
1. a large-scale flap valve rubber sealing element for water gate, generally bar shaped, it is characterised in that: its cross section is by being positioned at rubber seal
Lower floor's sealing member (1) of part side and the upper strata sealing member (2) of opposite side are composited；The material of lower floor's sealing member (1)
Shore hardness is more than the shore hardness of upper strata sealing member (1), and the elongation rate of tensile failure of the material of lower floor's sealing member (1) is less than upper strata
The elongation rate of tensile failure of sealing member (1).
Large-scale flap valve rubber sealing element for water gate the most according to claim 1, it is characterised in that: lower floor's sealing member (1) is adopted
The technical parameter of material of rubber be: hardness: 65 ± 5 continue your A, stretch breaking strength >=22MPa, elongation rate of tensile failure >=450%；
The technical parameter of the material of the rubber that upper strata sealing member (2) is used is: hardness 45 ± 5 continues your A, stretch breaking strength >=18MPa, draws
Disconnected percentage elongation >=600%.
Large-scale flap valve rubber sealing element for water gate the most according to claim 1, it is characterised in that: carry on the back at upper strata sealing member (2)
To the direction of lower floor's sealing member (1), it is provided with at least one protruding.
Large-scale flap valve rubber sealing element for water gate the most according to claim 3, it is characterised in that: carry on the back at upper strata sealing member (2)
Being provided with at least one first protruding (3) and at least one second protruding (4) on the direction of lower floor's sealing member (1), first is convex
Play (3) area on rubber seal cross section more than second projection (4) area on cross section.
Large-scale flap valve rubber sealing element for water gate the most according to claim 4, it is characterised in that: second protruding (4) are at rubber
Position on sealing member cross section is in first protruding (3) side of position on rubber seal cross section, at lower floor's sealing member
(1) installing hole (5) it is additionally provided with on.
6. the preparation method of the large-scale flap valve rubber sealing element for water gate described in any one of Claims 1 to 5, it is characterised in that: bag
Include following steps: a), prepare upper strata sealing member semi-finished product；B), preparation lower floor sealing member semi-finished product；C), by upper strata sealing member half
Finished product docks molding with lower floor sealing member semi-finished product；Described docking molding refers to be sealed with lower floor by upper strata sealing member semi-finished product
The composite sulfuration of part semi-finished product is reserved joint and is mutually butted.
The preparation method of large-scale flap valve rubber sealing element for water gate the most according to claim 6, it is characterised in that: described step
Rapid a and step b include vulcanisation step.
The preparation method of large-scale flap valve rubber sealing element for water gate the most according to claim 6, it is characterised in that: described is upper
In the constituent of layer sealing member, include following component by weight: natural rubber: 100 parts；Vulcanizing agent: 2～3 parts；
Accelerator: 1～1.5 part；Zinc oxide: 4～6 parts；Stearic acid: 2～3 parts；White carbon black: 15～25 parts；Age resistor: 3.5～4.5 parts；
Softening agent: 5～10 parts；In the constituent of described lower floor's sealing member, include following component by weight: natural rubber
Glue: 100 parts；Vulcanizing agent: 2～3 parts；Accelerator: 1～1.5 part；Zinc oxide: 4～6 parts；Stearic acid: 2～3 parts；White carbon black: 45～
55 parts；Age resistor: 3.5～4.5 parts；Softening agent: 2～5 parts.
The preparation method of large-scale flap valve rubber sealing element for water gate the most according to claim 8, it is characterised in that: described sulfuration
Agent is sulfur or its predispersion；Accelerator be the one of which in 2-benzothiazolyl mercaptan, dibenzothiazyl disulfide or
A combination thereof；Age resistor is one or a combination thereof of antioxidant 4010NA, antioxidant d or paraffin, and softening agent is machine oil；Described
White carbon black refers to N330 white carbon black；In the preparation method of upper strata sealing member and lower floor's sealing member, all comprise the following steps that the 1st step:
In natural rubber, add zinc oxide, stearic acid, N330 white carbon black, age resistor, softening agent by mixing prepared elastomeric compound；2nd step:
Sizing material is i.e. obtained by elastomeric compound adds vulcanizing agent, accelerator；3rd step: by above-mentioned sizing material back mixing, preforming, obtain preforming
Sizing material；4th step: the sizing material of above-mentioned preforming is put into mould, vulcanizes at vulcanizing press or drum vulcanizer, i.e.
?.
10. the fluid conveying being provided with the large-scale flap valve rubber sealing element for water gate described in any one of Claims 1 to 5 is equipped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410524.7A CN105906859A (en) | 2016-06-13 | 2016-06-13 | Large flap valve water gate rubber sealing part and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410524.7A CN105906859A (en) | 2016-06-13 | 2016-06-13 | Large flap valve water gate rubber sealing part and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN105906859A true CN105906859A (en) | 2016-08-31 |
Family
ID=56749969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610410524.7A Pending CN105906859A (en) | 2016-06-13 | 2016-06-13 | Large flap valve water gate rubber sealing part and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111511258A (en) * | 2017-12-28 | 2020-08-07 | 皇家飞利浦有限公司 | Mixing device with seal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111511258A (en) * | 2017-12-28 | 2020-08-07 | 皇家飞利浦有限公司 | Mixing device with seal |
| CN111511258B (en) * | 2017-12-28 | 2023-03-10 | 皇家飞利浦有限公司 | Mixing device with seal |
| US11882958B2 (en) | 2017-12-28 | 2024-01-30 | Koninklijke Philips N.V. | Mixing apparatus having a seal |
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Application publication date: 20160831 |