CN117619656A - Injection assembly for feeding viscous filler material and method for injection - Google Patents

Injection assembly for feeding viscous filler material and method for injection Download PDF

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Publication number
CN117619656A
CN117619656A CN202310781158.6A CN202310781158A CN117619656A CN 117619656 A CN117619656 A CN 117619656A CN 202310781158 A CN202310781158 A CN 202310781158A CN 117619656 A CN117619656 A CN 117619656A
Authority
CN
China
Prior art keywords
injection
assembly
return suction
gate nozzle
filler material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310781158.6A
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Chinese (zh)
Inventor
J·米尔登贝格尔
H·斯塔特菲尔德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of CN117619656A publication Critical patent/CN117619656A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/002—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces with feed system for supplying material from an external source; Supply controls therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/28—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with integral means for shielding the discharged liquid or other fluent material, e.g. to limit area of spray; with integral means for catching drips or collecting surplus liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
    • B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/10—Hand tools for removing partially or for spreading or redistributing applied liquids or other fluent materials, e.g. colour touchers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C7/00—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work
    • B05C7/06—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work by devices moving in contact with the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/22—Component parts, details or accessories; Auxiliary operations
    • B29C39/24—Feeding the material into the mould
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Coating Apparatus (AREA)
  • Nozzles (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to an injection assembly for feeding viscous filler material (4) from a supply assembly for viscous filler material (4) into a closed, sealed housing assembly (6) having at least one supply opening (12) and at least one air outlet opening, wherein at least one gate nozzle machine is providedA structure (8) and a coupling mechanism (10), wherein the gate nozzle mechanism (8) comprises a nozzle having a longitudinal axis L ZK Is releasably connectable in a fluid-tight manner via a coupling mechanism (10) to a supply port (12) in a housing assembly (6), wherein a return suction assembly (18) fluidly connected to the supply channel (16) is provided on the gate nozzle mechanism (8), the return suction assembly comprising a return suction channel (20) and a return suction device (22), wherein a longitudinal axis L of the return suction device RK And the longitudinal axis L ZK Extending coaxially. The invention also relates to a method for injecting a viscous filler material (4) into a housing assembly (6).

Description

Injection assembly for feeding viscous filler material and method for injection
Technical Field
The present invention relates to an injection assembly for feeding viscous filler material into a housing assembly, such as a battery module. The invention also relates to a method for injecting viscous filler material into a housing assembly.
Background
In a housing arrangement, for example of a battery module used in a motor vehicle or an aircraft, the individual battery cells must be heated as optimally as possible during power consumption or power output in order to avoid damaging the battery cells. For this purpose, a very thermally conductive viscous filler material (also called gap filler) is introduced into the battery module between the battery cells and the most metal housing inner wall to ensure heat transfer from the battery cells to the actual heat transfer medium. The filler material additionally serves to compensate for manufacturing-related tolerances of the housing assembly and the battery cells themselves in order to ensure an optimal connection of the heat dissipating battery surface to the housing assembly.
In so-called unitary housing devices, which represent independent geometries, viscous filler material is injected through one or more supply ports into the existing encapsulation gap between the cell surface and the housing inner wall. The supply port should be selected so that the injection operation is not hindered by tolerances affected by different cell geometries or other geometries during the filling process. Preferably, the injection is from the end face such that the filler material is then desirably urged upwardly toward the air outlet port against gravity via the manifold. It is desirable to generate a uniform flow front because severe premature zones (stark voreilende) of the flow front may cause bubbles to be trapped and thus the battery module to be classified as reject due to insufficient local cell cooling. The advantage of a front gate is that the flow front design is simpler, but it also has the disadvantage that the injection pressure driving the viscous filler increases linearly with the flow path. Thus, the supply port is at the highest injection pressure, which may then result in the cell located in that zone being locally exposed above its allowable pressure load limit. Seals having the task of coupling the filler material to the module housing only in the heat transfer zone are also subjected to high stresses of injection pressure.
Another option is surface (or center) injection of filler material. Advantageously, the at least one supply opening is positioned in the middle of the projection of the volume to be filled, since the flow path and thus the injection pressure is thereby halved in the same geometry compared to the front side injection. During an injection operation, there is a pressure gradient in the inflow medium that has a maximum at the injection point and a minimum at the flow front. When the state of volume filling is reached, the injection pressure increases at different rates and intensities depending on the injection strategy. In this case, a distinction is basically made between pressure-controlled injection strategies and volume-flow-controlled injection strategies, wherein both strategies can also be used simultaneously.
In the case of pressure control, the injection pressure is specified as a target variable, and the measured injection pressure is controlled as an actual variable. This strategy results in a flow front velocity that is not constant, but decreases from the beginning of the injection (maximum velocity) to the end of the injection (minimum velocity). This strategy ensures that the injection pressure does not exceed the maximum pressure load exerted by the battery cell at any time. This safety has a negative impact compared to volume flow control, manifesting as a longer injection time.
In the volume flow control, the injection volume per unit time is recorded as a target variable, and the volume flow provided by the injection unit is controlled as an actual variable. This means that the injection pressure can increase drastically in the volume filling. This increase is a function of the geometric landscape to be filled, which results in individual side-by-side cells. For example, if only the battery cells are mounted at an upper tolerance band relative to the nominal dimension due to tolerances in the height of the battery cells set by the production of the battery cells, the gap between the battery cell surface and the module wall will be relatively small. This results in the viscous filler material requiring a higher injection pressure at a constant flow rate in order to fill the volume, but the gap also fills faster (compared to the nominal gap).
Because the control of the injection operation (opaque module housing) cannot be carried out optically in all cases, and because the introduction of sensor technology into the module housing is uneconomical for detecting the injection operation state, the actual process values generated by the external sensors can only be used for process control.
The volume flow and the pressure values must be as close as possible to the actual injection point, so that the system-side disturbance effects on these actual variables can be kept as small as possible. However, due to the tolerance ranges of the battery cells and the profile housing, there is no consistent fill volume per injection operation, so the injection volume can only be used as an auxiliary process variable for quality assurance regarding the injection operation. From this fact, it can be seen that in any case a positive pressure is generated in the volume filled with filler material. After the injection has been closed, the positive pressure cannot drop to ambient pressure with the previous volume filling as long as there is no volume adjustment to reduce the pressure. Such a pressure drop occurs, for example, when the gate nozzle mechanism is disconnected from the supply port, and thus excess volume may escape. Depending on the viscosity and rheological behavior of the filler material, this can occur very rapidly or even slightly more slowly.
In addition, the positive pressure causes elastic expansion of the housing assembly, thereby overloading the cavity to be filled with filler material even more, and thus there is still additional filler material leaving the supply port upon separation.
This leaked filler material must be absorbed and the surface must then be additionally cleaned. These additional working steps require a lot of time and thus a lot of costs, especially in large scale applications.
From the prior art such as US 4,516,702A, DE 10 2004 032 273 B4 and EP 1 147 820 B1 applicators of sealing material, for example for wafers, are known, each of which has an expensive return suction device in order to suck excess material when the application procedure is completed. However, such applicator devices are not suitable for injecting viscous filler material into an injection assembly in a housing assembly.
Disclosure of Invention
The problem addressed by the present invention is therefore to avoid the above-mentioned features in a simple and inexpensive manner.
This problem is solved by an injection assembly for feeding viscous filler material from a supply assembly for viscous filler material into a closed sealed housing assembly having at least one supply port and at least one air discharge port, wherein at least one gate nozzle mechanism and a coupling mechanism are provided, wherein the gate nozzle mechanism comprises a housing having a longitudinal axis L ZK And is releasably connectable in a fluid-tight manner to a supply port in the housing assembly via a coupling mechanism, wherein a return suction assembly fluidly connected to the supply channel is provided on the gate nozzle mechanism, the return suction assembly comprising a return suction channel and a return suction device, wherein a longitudinal axis L of the return suction device RK With longitudinal axis L ZK Extending coaxially.
The injection assembly according to the invention is characterized in that it is very simple and inexpensive to manufacture and use, wherein fluid material escaping due to a reduced residual pressure can be collected particularly easily.
In a particularly advantageous embodiment, the return assembly as a return suction device comprises a hollow piston which is movably supported in a supply channel of the gate nozzle mechanism which is configured as a return suction channel, and a drive mechanism which cooperates with the return assembly at least in one direction. The drive mechanism may comprise a spring mechanism which naturally acts in only one direction and which, for example, by the action of a robotic arm, thereby holds the hollow piston under bias against the gate nozzle mechanism, which gate nozzle mechanism may thereby also be pressed against the housing assembly. In this context, the gate nozzle mechanism may be part of a robotic arm of an automated manufacturing facility. The force that must be applied to move the reciprocating piston against the spring mechanism may be applied by the robotic arm. Thus, for example, after the injection operation is completed, a back stroke movement in the direction of the spring force can then be performed by the robotic arm in order to release the return suction channel and the associated return suction volume. In an alternative embodiment, the driving element may be an actuator.
In a particularly simple embodiment of the injection assembly, the coupling mechanism is provided on the gate nozzle mechanism. Alternatively, the coupling mechanism may also be configured as a single component that can be inserted into the supply port.
The problem is also solved by a method for injecting viscous filler material by means of such an injection assembly, wherein in a first step a gate nozzle mechanism is fluidly coupled to a supply port; in a second step, an injection operation of the viscous fluid material is started; in a third step, the injection operation is monitored via a volume flow control with a predetermined volume per unit time as a target variable and/or via a pressure control with a predetermined injection pressure as a target variable; in the fourth step, the injection operation is stopped when the target variable is reached; in a fifth step, actuating the return suction means such that a return suction volume is provided; and in the sixth step, disconnecting the gate nozzle mechanism, wherein if the coupling mechanism is integral, the coupling mechanism is disconnected from the supply port, or if the coupling mechanism is a single component, the gate nozzle mechanism is separated from the coupling mechanism.
Drawings
The invention will be explained in more detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic cross-sectional view of an injection assembly connected to a housing assembly in a first position, and
fig. 2 is a schematic cross-sectional view of the injection assembly connected to the housing assembly in a second position.
Detailed Description
As shown in fig. 1 and 2, an injection assembly 2 for feeding viscous filler material 4 into a closed, sealed housing assembly 6 according to the present invention basically comprises a gate nozzle mechanism 8 and a coupling mechanism 10. The coupling mechanism 10 is connected to the housing in a releasable fluid-tight mannerA supply port 12 of a sidewall portion 14 of the assembly 6. The gate nozzle mechanism 8 is fluidly connected to the supply assembly via an injection lance, not further shown, so as to be connected via a nozzle having a longitudinal axis L ZK Is provided for guiding the viscous filler material 4 to the supply port 12. The viscous filler material may be, for example, a 1K or 2K gap filler.
Now, in order to prevent unwanted leakage of filler material 4 after the end of the injection operation, a return suction assembly 18 is provided, which is fluidly connected to the supply channel 16, wherein the supply channel 16 forms a return suction channel 20. A return suction device 22 is also provided in the feed channel 16, the longitudinal axis L of which return suction device RK With longitudinal axis L ZK Extending coaxially. The longitudinal axis refers to the respective fluid channel 16, 20. In the present exemplary embodiment, the return suction device 22 essentially comprises a drive element 24 and a hollow piston 26 which cooperates with the return suction device and is arranged movably in the supply channel 16. In the present case, the drive mechanism 24 basically comprises a spring mechanism 24 and a robotic arm cooperating with the drive mechanism, which robotic arm is not further shown. The spring means 24 naturally acts in only one direction and by the action of the robotic arm the hollow piston 26 is held under bias against the gate nozzle means 8, wherein the gate nozzle means 8 can thereby also be pressed against the housing assembly 6.
Fig. 1 now shows an injection assembly 2 during an injection operation. The hollow piston 26 is here in the forward position. The filler material 4 flows undisturbed through the hollow piston 26 into the housing assembly 6.
In the case of the filled housing assembly 6, the injection pressure is now increased with the same specification. The injection pressure is turned off, but the residual pressure build-up is mainly maintained. In order to selectively reduce this residual pressure without leaving filler material on the outside of the housing assembly 6, the injection assembly 2 is transferred into the position shown in fig. 2.
In fig. 2, the hollow piston 26 of the return suction assembly 18 is moved by the action of the robotic arm to a final position, for example, in which the residual biasing force of the spring mechanism 24 is maintained so as to continue to push the gate nozzle mechanism 8 against the housing assembly 6. However, it should be clear that in this context many possibilities of the design of the spring mechanism, in particular the direction of the biasing force, are possible. Alternatively, of course, an actuator acting on the hollow piston 26 may also be used. This will then release the return suction channel 20, which will thus serve as an additional volume for excess filler material 4. The filler material 4 is led into the return suction channel by the existing residual pressure. This return flow into the return suction channel 20 is also supported by the retraction of the hollow piston 26, thereby creating a negative pressure in the return suction channel 20.
In summary, the method for injecting the viscous filler material 4 by means of the injection assembly 2 according to the invention proceeds as follows: in the first step, the gate nozzle mechanism 8 is fluidly coupled to the supply port 12 via the coupling mechanism 10. In a second step, the injection operation of the viscous fluid material 4 is then started. In a third step the injection operation is monitored via a volume flow control (not further shown) with a predetermined volume per unit time as target variable and/or via a pressure control with a predetermined injection pressure as target variable, and in a fourth step the injection operation is stopped when the target variable is reached. In a fifth step, the return means 22 (in this embodiment an actuator) are now actuated, so that a return volume is provided in the return suction channel 20. Finally, in the sixth step, the gate nozzle mechanism 8 is disconnected, wherein in the case of integrating the coupling mechanism 10, the coupling mechanism 10 is disconnected from the supply port 12, or in the case of coupling mechanism 10 as a single component, the gate nozzle mechanism 8 is separated from the coupling mechanism 10.
If the gate nozzle mechanism 8 and return suction assembly 18 need to be rinsed/cleaned due to the potting time of the filler material 4, the hollow piston 26 is first moved back to the original position (according to fig. 1) and then the gate nozzle mechanism 8 is rinsed for reinsertion thereafter.

Claims (7)

1. An injection assembly for removing viscous filler material (4) from a body of materialA supply assembly for the viscous filler material (4) begins to feed into a closed sealed housing assembly (6) having at least one supply port (12) and at least one air discharge port, wherein at least one gate nozzle mechanism (8) and a coupling mechanism (10) are provided, wherein the gate nozzle mechanism (8) comprises a housing having a longitudinal axis L ZK Is releasably connectable in a fluid-tight manner to the supply port (12) in the housing assembly (6) via the coupling mechanism (10), wherein a return suction assembly (18) fluidly connected to the supply channel (16) is provided on the gate nozzle mechanism (8), the return suction assembly comprising a return suction channel (20) and a return suction device (22), wherein a longitudinal axis L of the return suction device RK With the longitudinal axis L ZK Extending coaxially.
2. Injection assembly according to claim 1, characterized in that the return suction assembly (18) as the return suction device (22) comprises a hollow piston (26) which is movably mounted in the supply channel (16) of the gate nozzle mechanism (8) configured as the return suction channel (20), and a drive mechanism (24) which cooperates with the return suction assembly in at least one direction.
3. Injection assembly according to claim 2, wherein the drive mechanism (24) comprises a spring mechanism which holds the hollow piston (26) under bias against the gate nozzle mechanism (8).
4. An injection assembly according to claim 2, wherein the drive mechanism (24) is an actuator.
5. Injection assembly according to any one of claims 1 to 4, wherein the coupling mechanism (10) is provided on the gate nozzle mechanism (8).
6. Injection assembly according to claims 1 to 4, characterized in that the coupling mechanism (10) is configured as a single component which can be inserted into the supply port (12).
7. A method for injecting a viscous filler material (4) by means of an injection assembly (2) according to any one of the preceding claims, characterized in that in a first step the gate nozzle mechanism (8) is fluidly coupled to the supply port (12) via a coupling mechanism (10); in a second step, starting an injection operation of the viscous fluid material (4); in a third step, the injection operation is monitored via a volume flow control with a predetermined volume per unit time as a target variable and/or via a pressure control with a predetermined injection pressure as a target variable; in a fourth step, stopping the injection operation when the target variable is reached; in a fifth step, actuating the return suction means (22) so as to provide a return suction volume (20); and in a sixth step, disconnecting the gate nozzle mechanism (8), wherein the coupling mechanism (10) is disconnected from the supply port (12) if the coupling mechanism (10) is integral, or the gate nozzle mechanism (8) is separated from the coupling mechanism (10) if the coupling mechanism (10) is a single component.
CN202310781158.6A 2022-08-24 2023-06-29 Injection assembly for feeding viscous filler material and method for injection Pending CN117619656A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022121353.6A DE102022121353B4 (en) 2022-08-24 2022-08-24 Injection arrangement for supplying viscous filling material and method for injection
DE102022121353.6 2022-08-24

Publications (1)

Publication Number Publication Date
CN117619656A true CN117619656A (en) 2024-03-01

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ID=88189762

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310781158.6A Pending CN117619656A (en) 2022-08-24 2023-06-29 Injection assembly for feeding viscous filler material and method for injection

Country Status (4)

Country Link
KR (1) KR20240028305A (en)
CN (1) CN117619656A (en)
DE (1) DE102022121353B4 (en)
GB (1) GB2623416A (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516702A (en) 1982-12-06 1985-05-14 Copar Corporation Dripless valve
US6334554B1 (en) * 2000-04-17 2002-01-01 Illinois Tool Works Inc. Snuffback valve for hot melt adhesive
JP4035728B2 (en) 2003-07-07 2008-01-23 Ｓｍｃ株式会社 Suck back valve
ITMO20060197A1 (en) 2006-06-16 2007-12-17 Kemac S P A INJECTOR FOR VISCOUS FLUIDS
CN113926649B (en) * 2021-10-22 2022-09-06 中山市普隆半导体设备有限公司 Suck-back dispensing valve for dispensing machine

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DE102022121353A1 (en) 2024-02-29
DE102022121353B4 (en) 2024-03-28
GB2623416A (en) 2024-04-17
KR20240028305A (en) 2024-03-05
GB202312692D0 (en) 2023-10-04

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