CN111745882A - PU sheet downward moving type foaming production process and production equipment thereof - Google Patents
PU sheet downward moving type foaming production process and production equipment thereof Download PDFInfo
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- CN111745882A CN111745882A CN202010531604.4A CN202010531604A CN111745882A CN 111745882 A CN111745882 A CN 111745882A CN 202010531604 A CN202010531604 A CN 202010531604A CN 111745882 A CN111745882 A CN 111745882A
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- bottom plate
- movable bottom
- foam
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- 238000005187 foaming Methods 0.000 title claims abstract description 153
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 239000006260 foam Substances 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 239000002655 kraft paper Substances 0.000 claims abstract description 9
- 239000011550 stock solution Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 6
- 229920001342 Bakelite® Polymers 0.000 claims description 3
- 239000004637 bakelite Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 21
- 230000006835 compression Effects 0.000 abstract description 8
- 238000007906 compression Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 5
- 239000000123 paper Substances 0.000 description 5
- 238000001467 acupuncture Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000002026 carminative effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
Images
Classifications
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- 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
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
-
- 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
-
- 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
- B29C44/35—Component parts; Details or accessories
-
- 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
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a downward moving type foaming production process of a PU sheet, which comprises the following processing steps: s1, positioning the foaming box right above the lifting platform, and enabling the movable bottom plate in the foaming box to move upwards through the lifting platform to ascend to a position 65% -75% of the total height of the foaming box; s2, adding the stock solution into the box-type foaming machine, and after stirring, lifting the box-type foaming machine upwards to enable the movable bottom plate of the foaming box to be filled with the foaming solution to start foaming; s3, when the foam rises 25-35% of the height, the lifting platform descends, and the movable bottom plate starts to move downwards at the same time, so that the residual materials foam downwards; and S4, after foaming of the foam is finished, puncturing kraft paper between the bottom of the foam and the movable bottom plate by using a needle inserting mechanism to exhaust, and finally obtaining the foam body with the rectangular section. The invention effectively solves the problems of large density gradient and poor middle compression strength of the original foaming process and the problems of large density of the original bottom and exceeding the standard through the downward moving box type foaming process.
Description
Technical Field
The invention belongs to the technical field of PU foaming production, and particularly relates to a PU sheet downward moving type foaming production process and production equipment thereof.
Background
The production process of manufacturing the PU sheet of the ceiling material in the automobile interior trim industry is generally a box-type foaming method, and the rear foam block is formed by slicing by a slicing machine. The process of a bottomless mixing tank in a box type foaming process is mainstream, as shown in fig. 1-2, a sealing ring is arranged at the bottom of the mixing tank and is tightly attached to the bottom of a tank, after raw liquid is stirred in the tank, the mixing tank is lifted from the bottom of the tank, the raw liquid flows to the bottom of the tank and fills the tank body with foam, and the foam freely rises to obtain final foam, and because of the resistance of side plates on the periphery of the foaming tank, the top of the foam freely rising to foam has obvious bulges, and in order to reduce the bulges at the top of the foam and improve the yield, two process methods are mainly adopted: the first is a capping method, which moves the capping plate 7 upwards along with the free rise of the foaming liquid, so that the material is forced to flow to the block-shaped edge, and finally, the foam with a relatively flat top is obtained. The process principle is schematically shown in figure 3. Secondly, an edge lifting method is adopted, a layer of packing paper 8 capable of being lifted upwards is laid on four side walls of the foaming box, the packing paper is lifted upwards manually along with the rising of foaming, the rising speed of foaming is kept basically consistent, the resistance of the side walls is eliminated, and therefore the height of the foam on the edges is consistent with the height of the foam in the middle. The process principle is schematically shown in figure 4.
The two modes are different in process mode of only controlling the flatness of the top of the foam, and the foaming process is the same, however, the largest problem of the foaming mode is that the density uniformity of the obtained foam is poor, the densities of the bottom and the top are large, and the density of the middle is low because the foam freely rises from the bottom of the foaming box to the top of the foaming box. The bottom is relatively poor in ventilation property, the top is relatively poor in extension property, the middle is relatively poor in compression property, in the actual use process, the PU sheet at the bottom obtained by a box-type foaming method often cannot meet the use requirements of customers due to poor density and poor ventilation property, the bulge problem occurs in the actual forming process, the bottom sheet often needs to be isolated by about 5 sheets to be used, and the PU sheet at the top often cannot meet the requirements of customers due to extension property, so that the problem of fracture occurs in the actual forming process. The middle sheet often has a problem of insufficient strength in actual molding because the compression property does not meet the customer's requirements.
Disclosure of Invention
The invention aims to provide a downward moving type foaming production process for a PU sheet, which effectively solves the problems of large density gradient and poor middle compression strength of the original foaming process.
In order to achieve the purpose, the invention adopts the technical scheme that: a PU sheet downward moving type foaming production process comprises the following processing steps:
s1, positioning the foaming box right above the lifting platform, and enabling the movable bottom plate in the foaming box to move upwards through the lifting platform to ascend to a position 65% -75% of the total height of the foaming box;
s2, adding the stock solution into the box-type foaming machine, and after stirring, lifting the box-type foaming machine upwards to enable the movable bottom plate of the foaming box to be filled with the foaming solution to start foaming;
s3, when the foam rises 25-35% of the height, the lifting platform descends, and the movable bottom plate starts to move downwards at the same time, so that the residual materials foam downwards;
and S4, after foaming of the foam is finished, puncturing kraft paper between the bottom of the foam and the movable bottom plate by using a needle inserting mechanism to exhaust, and finally obtaining the foam body with the rectangular section.
The technical scheme of further improvement in the technical scheme is as follows:
1. in the above scheme, the moving bottom plate moving speed in step S3 is the same as the foaming speed of the stock solution.
2. In the above scheme, kraft paper is laid between the foaming liquid and the movable floor in step S2.
The invention adopts another technical scheme that: the utility model provides a production facility that is used for PU sheet to move down formula foaming production, includes foaming case, movable bottom plate, lift platform, contact pin mechanism and geosyncline, be fixed with a lift platform in the middle of the geosyncline, the lift platform top is equipped with a foaming case, the top at the geosyncline is fixed to the foaming case, foaming bottom of the case portion is connected with the movable bottom plate that can reciprocate, be equipped with contact pin mechanism between movable bottom plate and the lift platform, contact pin mechanism connects at the movable bottom plate lower surface.
The technical scheme of further improvement in the technical scheme is as follows:
1. in the above scheme, pin mechanism includes contact pin, cylinder and composite sheet, a hollow cuboid structure is constituteed to the composite sheet, fixes at the activity bottom plate lower surface, contact pin and cylinder are installed in hollow cuboid structure, the cylinder is fixed on the composite sheet of cuboid bottom, the contact pin is installed on the cylinder, and the syringe needle moves towards the activity bottom plate.
2. In the scheme, the movable bottom plate is distributed with a plurality of needle holes, and the needle holes correspond to the positions of the contact pins.
3. In the scheme, a laser spot lamp is hung above the lifting platform and emits downward cross light, and scale marks are arranged at the bottom of the side wall of the foaming box.
4. In the scheme, a box-type foaming machine is hung above the foaming box.
5. In the scheme, the periphery of the movable bottom plate is provided with the flanges which are bent upwards, and the periphery of the movable bottom plate is completely attached to the inner wall of the foaming box.
6. In the scheme, the composite board in the pin inserting mechanism is formed by paving bakelite and a bottom board composite board.
7. In the scheme, the top of the foaming box is provided with the sensor.
8. In the scheme, the bottom of the foaming box is provided with the caster.
9. In the scheme, the bottom of the foaming box is provided with the opening, and the lifting platform can penetrate through the opening to move up and down.
10. In the scheme, the lifting platform is connected with a servo motor.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the downward-moving type foaming production process of the PU sheet, the problems of large density gradient and poor middle compression strength of the original foaming process are effectively solved through the downward-moving type box-type foaming process, and the problems of large density and out-of-standard of the original bottom are also effectively solved.
2. According to the downward moving type foaming production process of the PU sheet, the descending speed of the movable bottom plate can be adjusted in the foaming operation process, so that the descending speed is basically consistent with the ascending speed of the stock solution, the upper part is always kept horizontal, the flatness of top foaming is realized without pressing top or drawing paper at the edge, the operation steps are simplified, and the personnel configuration is saved; meanwhile, the bottom of the air exhaust pipe is provided with a pin inserting mechanism, so that an air exhaust effect can be achieved.
Drawings
FIG. 1 is a schematic structural diagram of a box-type foaming device in the prior art.
FIG. 2 is a schematic structural diagram of the apparatus for starting foaming in the box-type foaming method in the prior art.
FIG. 3 is a schematic diagram of the principle of the medium pressure jacking method in the prior art.
FIG. 4 is a schematic diagram illustrating the principle of the edge pulling method according to the prior art.
FIG. 5 is a schematic diagram of the apparatus of the present invention.
FIG. 6 is a schematic structural diagram of a movable base plate and a pin inserting mechanism according to the present invention.
FIG. 7 is a top view of the foam box of the present invention.
FIG. 8 is a schematic diagram of the foaming start of the present invention.
FIG. 9 is a schematic diagram of the foaming process of the present invention.
FIG. 10 is a table comparing the density of the down-shifting foamed sheet of the present invention with that of the prior art edge-pulling foamed sheet.
FIG. 11 is a graph showing the comparison of the compression strength of a downward moving foam of the present invention and a prior art edge-pulling foam.
In the figure: 1. a box-type foaming machine; 2. a foaming box; 21. scale lines; 3. a movable bottom plate; 31. a pinhole; 4. a lifting platform; 5. a pin inserting mechanism; 51. inserting a pin; 52. a cylinder; 53. a composite board; 6. a ground groove; 7. pressing a top plate; 8. and (7) packing paper.
Detailed Description
In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being 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; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.
The invention is further described below with reference to the following examples:
a production device for downward moving type foaming production of PU sheets comprises a foaming box 2, a movable bottom plate 3, a lifting platform 4, a pin mechanism 5 and a ground groove 6, wherein the lifting platform 4 is fixed in the middle of the ground groove 6, the foaming box 2 is arranged above the lifting platform 4, the bottom of the foaming box 2 is provided with trundles, and can be fixed on the ground above the ground groove 6 through the trundles, the bottom of the foaming box 2 is connected with the movable bottom plate 3 capable of moving up and down, the periphery of the movable bottom plate 3 is provided with an upward bent flanging, the periphery of the movable bottom plate 3 is completely attached to the inner wall of the foaming box 2, the pin mechanism 5 is arranged between the movable bottom plate 3 and the lifting platform 4, and the pin mechanism 5 is connected to the lower surface of the movable bottom; the pin mechanism 5 comprises a pin 51, a cylinder 52 and a composite plate 53, the composite plate 53 is formed by paving bakelite and a bottom plate composite plate, the whole weight can be reduced, the composite plate 53 forms a hollow cuboid structure and is fixed on the lower surface of the movable bottom plate 3, the pin 51 and the cylinder 52 are installed in the hollow cuboid structure, the cylinder 52 is fixed on the composite plate 53 at the bottom of the cuboid, the pin 51 is installed on the cylinder 52, and the needle head faces the movable bottom plate 3; a plurality of pinholes 31 are distributed on the movable bottom plate 3, the positions of the pinholes 31 correspond to the positions of the contact pins 51, and when the cylinder 52 pushes the contact pins 51 to move up and down, the contact pins 51 can penetrate through the pinholes to pierce kraft paper laid on the movable bottom plate, so that an exhaust effect is achieved.
The laser spot lamp is hung above the lifting platform 4, the cross light of the laser spot lamp is matched with the scale marks on the lifting platform 4, the ray of the laser cross spot lamp is red, the light distance is adjustable, the laser spot lamp emits downward cross light, the scale marks 21 are arranged at the bottom of the side wall of the foaming box 2, the cross light is coincided with the scale marks 21 by moving the foaming box 2, and the positioning of the foaming box 2 on the lifting platform is realized.
And a box-type foaming machine 1 is hung above the foaming box 2 and is used for pouring foaming liquid into the foaming box 2 and foaming.
An opening is formed in the bottom of the foaming box 2, and the lifting platform 4 can move up and down through the opening.
The top of the foaming box 2 is provided with a sensor, when foam foams to the top of the foaming box 2, the sensor sends a signal, at the moment, the lifting platform begins to descend, and meanwhile, the movable bottom plate 3 descends together.
The lifting platform 4 is connected with a servo motor, the lifting and the falling of the lifting platform 4 are controlled through the servo motor, the lifting speed is stable and consistent, and the speed is adjustable.
Example 1: a PU sheet downward moving type foaming production process comprises the following processing steps:
s1, turning on the laser lamp, aligning the cross light with the scale marks of the lifting platform 4, moving the foaming box 2 to the position above the lifting platform 4, enabling the cross light to coincide with the scale marks 21 by adjusting the position of the foaming box, and fixing the foaming box 2 through the casters; opening a servo motor to enable the lifting platform 4 to ascend and push the movable bottom plate 3 in the foaming box 2 to move upwards and ascend to the position 75% of the total height of the foaming box 2;
s2, paving kraft paper on the movable bottom plate 3, adding the stock solution into the box-type foaming machine 1, lifting the box-type foaming machine 1 upwards after stirring is finished, filling the movable bottom plate 3 of the foaming box 2 with the foaming solution, and starting foaming;
s3, when the foam rises 25% of the height, the sensor at the top of the foam box 2 senses that the lifting platform 4 begins to descend, and the movable bottom plate 3 begins to move downwards at the same time, so that the rest materials foam downwards, the descending speed is consistent with the foaming speed, and the descending speed is controlled by a servo motor;
s4, after the foam foaming is finished, the lifting platform 4 descends to the ground groove 6, at the moment, the air cylinder 52 of the pin inserting mechanism 5 is opened, the air cylinder 52 pushes the pin 51 to reciprocate up and down, kraft paper between the foam bottom and the movable bottom plate 3 is punctured for exhausting air, and finally foam with a rectangular cross section is obtained, at the moment, the foaming box 2 can be moved to a semi-finished product area, the demoulding operation is started after the foam is cured, and the cycle is completed.
Example 2: a PU sheet downward moving type foaming production process comprises the following processing steps:
s1, turning on the laser lamp, aligning the cross light with the scale marks of the lifting platform 4, moving the foaming box 2 to the position above the lifting platform 4, enabling the cross light to coincide with the scale marks 21 by adjusting the position of the foaming box, and fixing the foaming box 2 through the casters; opening a servo motor to enable the lifting platform 4 to ascend and push the movable bottom plate 3 in the foaming box 2 to move upwards and ascend to the position of 70% of the total height of the foaming box 2;
s2, paving kraft paper on the movable bottom plate 3, adding the stock solution into the box-type foaming machine 1, lifting the box-type foaming machine 1 upwards after stirring is finished, filling the movable bottom plate 3 of the foaming box 2 with the foaming solution, and starting foaming;
s3, when the foam rises 30% of the height, the sensor at the top of the foam box 2 senses that the lifting platform 4 begins to descend, and the movable bottom plate 3 begins to move downwards at the same time, so that the rest materials foam downwards, the descending speed is consistent with the foaming speed, and the descending speed is controlled by a servo motor;
s4, after the foam foaming is finished, the lifting platform 4 descends to the ground groove 6, at the moment, the air cylinder 52 of the pin inserting mechanism 5 is opened, the air cylinder 52 pushes the pin 51 to reciprocate up and down, kraft paper between the foam bottom and the movable bottom plate 3 is punctured for exhausting air, and finally foam with a rectangular cross section is obtained, at the moment, the foaming box 2 can be moved to a semi-finished product area, the demoulding operation is started after the foam is cured, and the cycle is completed.
The above-mentioned aspects of the invention are further explained as follows:
the PU sheet is prepared by adopting an edge pulling method in the prior art, compared with the product of the embodiment 1, foams of the PU sheet and the product are respectively sliced, and the sliced PU sheet is subjected to density and compression strength tests.
As can be seen from FIG. 10, the density of the top 10 PU sheets foamed by the downdraw foaming method of the present invention is substantially the same as that of the top 10 PU sheets foamed by the edge-draw method of the prior art, and is 29.6-27.6kg/m3Within the range.
The density of the middle 20 PU sheets foamed by the edge pulling method is 26 to 26.6kg/m3The density of the middle 20 PU sheets of the downward moving type bubble is within the range of 26.8-27.1kg/m3Within the range, the density of 20 PU sheets in the middle of the downward moving type foaming is higher than that of the edge pulling method by about 3 percent.
The density of the bottom 10 PU sheets foamed by the edge pulling method is 26.8-28kg/m3The density of the bottom 10 PU sheets of the downward moving type bubble is within the range of 26.4-27.4kg/m3Within this range, the density of 10 PU sheets at the bottom of the downward moving foam is lower by about 2% as a whole than that of the edge-pulling foam.
As can be seen from fig. 11, the PU sheet in the middle of foaming has the lowest density, and the compressive strength is also the weakest part, and the PU sheet in the middle of two foaming processes is sampled and tested respectively for statistical analysis of the compressive strength, and the compressive strength in the middle of downward-moving foaming is obviously higher than that in the edge-pulling method, and is increased by more than 10% on average.
The PU sheet downward moving type foaming production process effectively solves the problems of large density gradient and poor middle compression strength of the original foaming process, and also effectively solves the problems of large density and out-of-standard density of the original bottom.
Select the foaming of the same stoste system for use, the same input volume, according to the carminative foaming of normal bottom no acupuncture, the concave 7cm in foam bottom, section thickness 8mm, section quantity 97, according to the foaming of bottom acupuncture exhaust technology, the concave 4cm in foam bottom, section thickness 8mm, section quantity 102, sample the ventilative test of bottom same position, the carminative sheet ventilation range of no acupuncture is: 0.72-1.24, the air permeability range of the needling air-exhaust sheet is as follows: 0.96-1.79. It is known that the air permeability of the PU sheet can be improved by providing the piercing process.
In addition, in the process of the downward moving type foaming, the descending speed of the movable bottom plate can be adjusted or can be designed in a programmable mode, so that the descending speed is basically consistent with the ascending speed of the stock solution, the upper part of the movable bottom plate is always kept horizontal, the flatness of top foaming is realized without pressing or drawing paper at the edge, the operation steps are simplified, and the personnel configuration is saved.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A PU sheet downward moving type foaming production process is characterized in that: the method comprises the following processing steps:
s1, positioning the foaming box (2) right above the lifting platform (4), and then enabling the movable bottom plate (3) in the foaming box (2) to move upwards through the lifting platform (4) and ascend to a position 65% -75% of the total height of the foaming box (2);
s2, adding the stock solution into the box-type foaming machine (1), after stirring, lifting the box-type foaming machine (1) upwards to enable the movable bottom plate (3) of the foaming box (2) to be filled with the foaming solution, and starting foaming;
s3, when the foam rises 25-35% of the height, the lifting platform (4) descends, and the movable bottom plate (3) starts to move downwards at the same time, so that the rest materials foam downwards;
and S4, after foaming of the foam is finished, puncturing kraft paper between the bottom of the foam and the movable bottom plate (3) by using a needle inserting mechanism (5) for exhausting air, and finally obtaining the foam body with the rectangular section.
2. The PU sheet downward moving type foaming production process according to claim 1, wherein: in the step S3, the moving speed of the movable bottom plate is the same as the foaming speed of the stock solution.
3. The utility model provides a production facility that is used for PU sheet to move down formula foaming production which characterized in that: including foaming case (2), movable bottom plate (3), lift platform (4), contact pin mechanism (5) and geosyncline (6), geosyncline (6) middle lifting platform (4) of being fixed with, lift platform (4) top is equipped with a foaming case (2), the top at geosyncline (6) is fixed in foaming case (2), foaming case (2) bottom is connected with movable bottom plate (3) that can reciprocate, be equipped with contact pin mechanism (5) between movable bottom plate (3) and lift platform (4), contact pin mechanism (5) are connected at movable bottom plate (3) lower surface.
4. The production apparatus for downward movement type foaming production of PU sheet according to claim 3, wherein: pin mechanism (5) are including contact pin (51), cylinder (52) and composite sheet (53), a hollow cuboid structure is constituteed in composite sheet (53), fixes at activity bottom plate (3) lower surface, contact pin (51) and cylinder (52) are installed in hollow cuboid structure, cylinder (52) are fixed on composite sheet (53) of cuboid bottom, contact pin (51) are installed on cylinder (52), and the syringe needle is towards activity bottom plate (3).
5. Production equipment for downward movement type foaming production of PU sheets according to claim 4, characterized in that: a plurality of needle holes (31) are distributed on the movable bottom plate (3), and the positions of the needle holes (31) correspond to the positions of the contact pins (51).
6. The production apparatus for downward movement type foaming production of PU sheet according to claim 3, wherein: a laser spot lamp is hung above the lifting platform (4), the laser spot lamp emits downward cross light, and scale marks (21) are arranged at the bottom of the side wall of the foaming box (2).
7. The production apparatus for downward movement type foaming production of PU sheet according to claim 3, wherein: and a box-type foaming machine (1) is hung above the foaming box (2).
8. The production apparatus for downward movement type foaming production of PU sheet according to claim 3, wherein: the periphery of the movable bottom plate (3) is provided with a flanging which is bent upwards, and the periphery of the movable bottom plate (3) is completely attached to the inner wall of the foaming box (2).
9. Production equipment for downward movement type foaming production of PU sheets according to claim 4, characterized in that: the composite board (53) in the pin inserting mechanism (5) is formed by paving bakelite and a bottom board composite board.
10. The production apparatus for downward movement type foaming production of PU sheet according to claim 3, wherein: the top of the foaming box (2) is provided with a sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010531604.4A CN111745882A (en) | 2020-06-11 | 2020-06-11 | PU sheet downward moving type foaming production process and production equipment thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010531604.4A CN111745882A (en) | 2020-06-11 | 2020-06-11 | PU sheet downward moving type foaming production process and production equipment thereof |
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| CN109531905A (en) * | 2018-12-05 | 2019-03-29 | 溧阳市山湖实业有限公司 | A kind of automatic tooling of bearing down on one of skylight abnormity bubble |
| CN212653752U (en) * | 2020-06-11 | 2021-03-05 | 溧阳市山湖实业有限公司 | Production equipment for downward moving type foaming production of PU (polyurethane) sheet |
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