CN113878785B - Annotate material rifle head and have its refrigerator cabinet polyurethane notes material system - Google Patents
Annotate material rifle head and have its refrigerator cabinet polyurethane notes material system Download PDFInfo
- Publication number
- CN113878785B CN113878785B CN202111182809.7A CN202111182809A CN113878785B CN 113878785 B CN113878785 B CN 113878785B CN 202111182809 A CN202111182809 A CN 202111182809A CN 113878785 B CN113878785 B CN 113878785B
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- China
- Prior art keywords
- gun head
- cavity
- material injection
- connecting rod
- injection
- Prior art date
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- 239000000463 material Substances 0.000 title claims abstract description 99
- 229920002635 polyurethane Polymers 0.000 title abstract description 28
- 239000004814 polyurethane Substances 0.000 title abstract description 28
- 238000002347 injection Methods 0.000 claims abstract description 76
- 239000007924 injection Substances 0.000 claims abstract description 76
- 230000009471 action Effects 0.000 claims abstract description 15
- 230000010365 information processing Effects 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 10
- 238000001746 injection moulding Methods 0.000 abstract description 2
- 238000005187 foaming Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000010992 reflux Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
- B29C44/424—Details of machines
- B29C44/425—Valve or nozzle constructions; Details of injection devices
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/60—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/762—Household appliances
- B29L2031/7622—Refrigerators
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a material injection gun head and a refrigerator cabinet polyurethane material injection system with the same, and relates to the technical field of polyurethane injection molding. The gun head comprises a gun head body, wherein a cavity is formed in the gun head body along the axial direction of the gun head body, a discharging end of the cavity is provided with a conical material injection port communicated with the cavity, a plug is matched with the material injection port, and the tail end of the plug is connected with a connecting rod through a spring; the cavity comprises a first cylindrical cavity with an inner diameter of R1 and a second cylindrical cavity with an inner diameter of R2, and the end part of the second cylindrical cavity is communicated with the material injection port; the connecting rod and the spring are positioned in the first cylindrical cavity, and one end of the connecting rod penetrates through the first cylindrical cavity and extends to the outside of the gun head body; the material injection system comprises a material injection gun head, a program input module, an information processing module and an action module. According to the polyurethane filling system with variable filling flow and the elastic filling gun head, the problem of non-uniform polyurethane filling caused by large box size is solved.
Description
Technical Field
The invention belongs to the technical field of polyurethane injection molding, and particularly relates to a material injection gun head and a refrigerator cabinet polyurethane material injection system with the same.
Background
Polyurethane foaming is an essential important link in the refrigerator cabinet production and manufacturing process, the process is a row of a plurality of box foaming molds (generally 8 or 12 or the like), the row of molds contain various different types of boxes, polyurethane AB materials are sequentially injected into corresponding empty boxes to be foamed through a high-pressure material injection gun head, and the material injection pressure and the material injection flow of the gun head are kept unchanged at present. The polyurethane raw material is a double-component AB material, the AB material is injected into an empty box body to be foamed through an injection gun head, the injection mode is that the back of the empty box body is horizontally placed in a mould upwards at a lower door opening position, the injection gun head injects the AB material into a back cavity from the bottom of the empty box body under high pressure, and then the AB material is subjected to a series of physical and chemical reactions, so that the polyurethane AB material is finally reacted into a solid from a liquid state to fill the cavity of the whole empty box body, a heat preservation layer is formed, and meanwhile, the function of supporting strength is achieved.
From the above description, it can be seen that the dropping point of the polyurethane AB material is controlled at the middle of the box body, which is favorable for the polyurethane foam to be uniformly distributed in the cavity of the heat insulation layer of the box body. At present, two adverse conditions appear, the first condition is that some refrigerator cabinet models are great, the size is longer, AB material drop point is in the centre, hardly evenly fill in the box cavity when polyurethane AB material reaction is accomplished, has increased the risk that foaming terminal filling is poor to foaming defective rate has been increased. The second condition is that the production of different types of boxes in the same row of dies can occur due to the fact that the number of the products is large, particularly the production of the same row of dies with large size differences can cause unreasonable AB material drop points, and the drop points of the gun heads are fixed due to the fact that the injection pressure and the injection flow of the gun heads are unchanged, so that the small-size drop points of the boxes are located in front, and the large-size drop points of the boxes are located in back. The size difference of the box body is larger, and the AB material falling points are difficult to unify, so that the foaming AB material is unevenly distributed, and the foaming quality is affected.
In the existing state, the polyurethane AB material of the box body with larger size is unevenly distributed due to the unchanged filling pressure and filling flow of the gun head, so that the defective rate of foaming quality is increased; meanwhile, when the same-row mould of the box bodies with larger size difference is produced, the position of the falling point is fixed and cannot be adjusted, so that the AB materials of the box bodies with small size and large size are unevenly distributed, and the defective rate of foaming quality is increased.
Disclosure of Invention
The invention aims to provide a material injection gun head and a refrigerator cabinet polyurethane material injection system with the same, and solves the problem of uneven polyurethane filling caused by large size of a refrigerator body through a polyurethane material injection system with variable material flow and an elastic material injection gun head; solves the problem of uneven polyurethane filling caused by the production of the same-row mould with larger box body size difference.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a material injection gun head, which comprises a gun head body, wherein a cavity is arranged in the gun head body along the axial direction of the gun head body, a material injection port which is communicated with the cavity and is conical is arranged at the discharge end of the cavity, a plug is arranged at the material injection port in a matched manner, and the tail end of the plug is connected with a connecting rod through a spring.
Further, the cavity comprises a first cylindrical cavity with an inner diameter of R1 and a second cylindrical cavity with an inner diameter of R2, and the end part of the second cylindrical cavity is communicated with the material injection port; the connecting rod and the spring are positioned in the first cylindrical cavity, and one end of the connecting rod penetrates through the first cylindrical cavity and extends to the outside of the gun head body; r1 is more than R2.
Further, the gun head body is also provided with an A material inlet, an A material reflux port, a B material inlet and a B material reflux port.
Further, the material injection gun head comprises the material injection gun head, a program input module, an information processing module and an action module; the action module is connected with the connecting rod and drives the connecting rod to stretch back and forth in the cavity; the information processing module is used for converting the program of the program input module into an electric signal and sending the electric signal to the action module.
Further, the injection control method based on the injection system comprises the following steps:
stp1, inputting a material injection quantity and a variable material injection flow through a program input module;
wherein the variable injection flow is set to flow X1g/s duration Y1 s, flow X2g/s duration Y2s.
Stp2, if the integral actual material injection time T is less than or equal to the duration time sigma Y of each flow section, the material injection naturally stops when the material injection time T is finished; if the whole material injection time T is more than the duration time sigma Y of each flow section, and the time sigma Y is finished, continuing to inject the material according to the flow of the last stage until the material injection quantity is finished.
The invention has the following beneficial effects:
according to the polyurethane filling system with variable filling flow and the elastic filling gun head, the problem of non-uniform polyurethane filling caused by large box size is solved; solves the problem of uneven polyurethane filling caused by the production of the same-row mould with larger box body size difference; because the filling distance of the polyurethane AB material is shortened, namely the filling speed of the polyurethane is increased, the polyurethane AB material with higher reaction speed can be adopted, thereby improving the production efficiency and the heat insulation performance of the polyurethane.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a gun head according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "open," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like indicate orientation or positional relationships, merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Embodiment 1, please refer to fig. 1, a material injection gun head, including a gun head body 10, a cavity 11 is arranged in the gun head body 10 along the axial direction thereof, a material injection port 8 which is communicated with the cavity 11 and is conical is arranged at the discharge end of the cavity 11, a plug 1 is cooperatively arranged at the material injection port 8, and the tail end of the plug 1 is connected with a connecting rod 3 through a spring 2; the cavity 11 comprises a first cylindrical cavity 111 with an inner diameter R1 and a second cylindrical cavity 112 with an inner diameter R2, and the end part of the second cylindrical cavity 112 is communicated with the material injection port 8; the connecting rod 3 and the spring 2 are positioned in the first cylindrical cavity 111, and one end of the connecting rod 3 penetrates through the first cylindrical cavity 111 and extends to the outside of the gun head body 10, wherein R1 is more than R2; the gun head body 10 is also provided with an A material inlet 4, an A material reflux port 5, a B material inlet 6 and a B material reflux port 7.
The gun head nozzle plug is bullet-shaped, the nozzle plug 1 is connected with the connecting rod 3 through the spring 2, so that when the flow rate of injected materials is large, the opening of the gun head nozzle is large due to backward force brought by AB material flowing, when the flow rate is small, the nozzle is weakened due to backward force brought by flowing, the nozzle plug 1 is moved forwards by the elasticity of the spring 2, at the moment, the opening of the gun head nozzle is small, the flow rate reduction degree of AB materials due to the reduction of the flow rate of the injected materials is weakened due to the reduction of the sectional area of the opening, and therefore, fault phenomenon does not occur at the falling point of AB materials, but the falling point moves backwards a little. When the flow of the injected material is reduced at a constant speed, the AB material falling point is in a relatively uniform line segment shape
Embodiment 2 a filling system based on the filling gun head of embodiment 1 above:
the device comprises a program input module, an information processing module, an action module and a material injection gun head; the action module is connected with the connecting rod 3 and drives the connecting rod 3 to stretch back and forth in the cavity 11; the information processing module is used for converting the program of the program input module into an electric signal and sending the electric signal to the action module.
Inputting and storing material injection programs of Z box foaming molds through a program input module, and inputting corresponding material injection programs according to model size characteristics of the boxes corresponding to each mold; and (3) starting polyurethane injection action, wherein after an empty box body to be foamed enters a corresponding mould, the elastic injection gun head is in place, and according to an injection program corresponding to the mould, starting injection, and in the injection process, the action module carries out corresponding injection action according to an electric signal given by the information processing module, so as to adjust the injection flow in real time. The falling point of the material injection gun head forms a relatively uniform line segment AB material in the cavity of the box body to be foamed. After the reaction of the AB material with polyurethane is completed, the box body after foaming is pushed out of the die and enters the next process. The injection gun head moves to the next empty box body mould with foaming, then the injection action is completed according to the corresponding injection program of the corresponding mould, and the reciprocating circulation is performed
Embodiment 3, the injection control method of the injection system based on embodiment 2 above includes:
stp1, inputting a material injection quantity and a variable material injection flow through a program input module;
wherein the variable injection flow is set to flow X1g/s duration Y1 s, flow X2g/s duration Y2s.
Stp2, if the integral actual material injection time T is less than or equal to the duration time sigma Y of each flow section, the material injection naturally stops when the material injection time T is finished; if the whole material injection time T is more than the duration time sigma Y of each flow section, and the time sigma Y is finished, continuing to inject the material according to the flow of the last stage until the material injection quantity is finished.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (4)
1. A material injection control method is characterized in that:
the automatic feeding device comprises a feeding gun head, wherein the feeding gun head comprises a gun head body (10), a cavity (11) is formed in the gun head body (10) along the axial direction of the gun head body, a feeding port (8) which is communicated with the cavity (11) and is conical is formed in the discharging end of the cavity (11), a plug (1) is arranged at the feeding port (8) in a matched mode, and a connecting rod (3) is connected to the tail end of the plug (1) through a spring (2); the action module is connected with the connecting rod (3) and drives the connecting rod (3) to stretch back and forth in the cavity (11);
the system also comprises a program input module, an information processing module and an action module;
the action module is connected with the connecting rod (3) and drives the connecting rod (3) to stretch back and forth in the cavity (11); the information processing module is used for converting the program of the program input module into an electric signal and sending the electric signal to the action module;
the material injection control method comprises the following steps:
stp1, inputting a material injection quantity and a variable material injection flow through a program input module;
wherein the variable injection flow is set to flow X1g/s duration Y1 s, flow X2g/s duration Y2s.
Stp2, if the integral actual material injection time T is less than or equal to the duration time sigma Y of each flow section, the material injection naturally stops when the material injection time T is finished; if the whole material injection time T is more than the duration time sigma Y of each flow section, and the time sigma Y is finished, continuing to inject the material according to the flow of the last stage until the material injection quantity is finished.
2. A method of controlling injection according to claim 1, wherein the cavity (11) comprises a first cylindrical cavity (111) having an inner diameter R1 and a second cylindrical cavity (112) having an inner diameter R2, an end of the second cylindrical cavity (112) being in communication with the injection port (8);
the connecting rod (3) and the spring (2) are positioned in the first cylindrical cavity (111), and one end of the connecting rod (3) penetrates through the first cylindrical cavity (111) and extends to the outside of the gun head body (10).
3. The method of claim 2, wherein R1 > R2.
4. The injection control method according to claim 1, wherein the gun head body (10) is further provided with an a material inlet (4), an a material return port (5), a B material inlet (6), and a B material return port (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111182809.7A CN113878785B (en) | 2021-10-11 | 2021-10-11 | Annotate material rifle head and have its refrigerator cabinet polyurethane notes material system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111182809.7A CN113878785B (en) | 2021-10-11 | 2021-10-11 | Annotate material rifle head and have its refrigerator cabinet polyurethane notes material system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113878785A CN113878785A (en) | 2022-01-04 |
| CN113878785B true CN113878785B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111182809.7A Active CN113878785B (en) | 2021-10-11 | 2021-10-11 | Annotate material rifle head and have its refrigerator cabinet polyurethane notes material system |
Country Status (1)
| Country | Link |
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| CN (1) | CN113878785B (en) |
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2021
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| KR20030025509A (en) * | 2001-09-21 | 2003-03-29 | 동부아디아판넬 주식회사 | Injecting apparatus for poly-urethan |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113878785A (en) | 2022-01-04 |
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