CN113844004B - Preparation mold and preparation method of PVC (polyvinyl chloride) foamed floor - Google Patents
Preparation mold and preparation method of PVC (polyvinyl chloride) foamed floor Download PDFInfo
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- CN113844004B CN113844004B CN202111253136.XA CN202111253136A CN113844004B CN 113844004 B CN113844004 B CN 113844004B CN 202111253136 A CN202111253136 A CN 202111253136A CN 113844004 B CN113844004 B CN 113844004B
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
- B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- 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
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
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- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
-
- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/25—Solid
- B29K2105/251—Particles, powder or granules
-
- 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
- B29K2509/00—Use of inorganic materials not provided for in groups B29K2503/00 - B29K2507/00, as filler
- B29K2509/14—Stones
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
- E04F15/105—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials of organic plastics with or without reinforcements or filling materials
Abstract
A mould for producing PVC foam floor, the mould is provided with a foam core layer preparation component comprising a main runner for passing a core layer material and an outer layer preparation component comprising at least one auxiliary runner for passing an outer layer material; the auxiliary flow passage comprises a first input section, a casting section and a coating section, and the foaming section of the main flow passage extends into the auxiliary flow passage from one end of the casting section; the foaming section comprises a non-bonding area, a bonding area and a smooth transition area arranged between the non-bonding area and the bonding area, and the outer wall of the smooth transition area deflects outwards to form a smooth transition curved surface in the material conveying direction; the casting section is sequentially provided with an annular casting section, a transition section and a forming section along the flow direction of the material; the coating floor produced by the die has flat surface and stable quality; the invention also provides a method for preparing the PVC foam floor.
Description
Technical Field
The invention belongs to the technical field of floor manufacturing, and particularly relates to a preparation method and a preparation mold of a PVC foam floor.
Background
The wood-plastic foamed floor has the advantages of strong, rigid and stable properties, no quarantine, no heat treatment and no fumigation treatment, has the characteristics of insect damage prevention, termite resistance, water resistance, moisture resistance and heat insulation, avoids the defects of cracking, decay, insect damage, scabbing, chromatic aberration, high-temperature creep of plastic materials, low-temperature cold brittleness and the like of the traditional wood, can be sawed, planed and nailed, has good mechanical properties, has various patterns and colors, and is an ideal novel material.
The Chinese patent application document with the application number of CN201010208989.7 discloses a preparation method of a polystyrene wood-like profile, which comprises the steps of preparing a surface layer material and a core layer material, respectively putting the surface layer material and the core layer material into an auxiliary extruder and a main extruder, co-extruding the two extruders into a die, and integrating the two extruders into a whole in the die, wherein the surface layer material is coated on the surface of the core layer material.
The utility model provides a chinese patent application document of application number CN201410184409.3 discloses a coextrusion mould of plastic-wood composite new material, including main extruder and auxiliary extruder, a coextrusion mould is connected jointly to main extruder and auxiliary extruder, the die cavity of coextrusion mould includes the main extrusion chamber of being connected with main extruder, still includes the auxiliary extrusion chamber of being connected with auxiliary extruder, auxiliary extrusion chamber passes through runner connection surface material entry, the cavity wall up end between main extrusion chamber and the auxiliary extrusion chamber is less than runner wall up end, and surface layer material can cross cavity wall up end and get into main extrusion chamber under the extrusion pressure effect, cladding at sandwich material surface.
The mold and the preparation method have the phenomena of uneven surface and hidden cracks when the coated co-extrusion plate is produced, and seriously influence the use of the plate.
Disclosure of Invention
In order to solve the technical problems, the invention provides a preparation method and a preparation mold of a PVC foam floor.
The technical scheme of the invention is as follows:
a mould for producing PVC foaming floor comprises at least a core layer feeding plate, an outer layer feeding plate and a foaming plate;
the mold is provided with a foaming core layer preparation component comprising a main runner for passing a core layer material and an outer layer preparation component comprising at least one auxiliary runner for passing an outer layer material; the main flow passage comprises a non-foaming section and a foaming section, and protruding blocks are arranged on two sides of the main flow passage; the auxiliary flow passage comprises a first input section, a casting section and a coating section, and the foaming section of the main flow passage extends into the auxiliary flow passage from one end of the casting section; the foaming section comprises a non-bonding area, a bonding area and a smooth transition area arranged between the non-bonding area and the bonding area, and the outer wall of the smooth transition area deflects outwards to form a smooth transition curved surface in the material conveying direction;
the casting section is sequentially provided with an annular casting section, a transition section and a forming section along the flow direction of the material; the annular casting section is a runner with a rectangular annular section; the outer wall of the flow passage of the transition section is provided with four inward inclined planes; the middle parts of two sides of the outer wall of the forming section are provided with inward protruding structures, and the side surfaces of the protruding blocks in the forming section are provided with grooves matched with the protruding structures; the two sides of the transition section are provided with transition forming parts for transitionally forming the grooves and the protruding structures.
In the prior art, the flow delay of the surface material in the die always avoids the intersection of multiple strands of materials, the multiple strands of materials after intersection cannot be well fused, and uneven phenomenon at the intersection can be caused during slow solidification and molding, so that the attractiveness and the usability of the plate are seriously affected.
In the technical scheme, the outer layer material is coated on the upper surface, the lower surface and the side surfaces of the foaming floor with the side surface grooves through the auxiliary runners, the auxiliary runners forming the surface layers are generally straight, the crossed surface layer materials can not be well blended when flowing in the auxiliary runners, in the technical scheme, when one auxiliary runner is arranged, the surface layer materials enter the casting section from the upper part of the annular casting section and are cast to two sides after entering, and finally are converged on the lower surface of the casting section, due to the design of the inclined planes in the transition section, the materials converged at the position can be subjected to the force given by the adjacent materials and the force given by the inclined planes, and the two forces can promote the fusion of the materials; meanwhile, when the plate passes through the smooth transition area, the outer wall of the smooth transition area deflects outwards to enable the flow channel cavity of the transition section to be contracted again, and materials at the junction can be further fused again due to the force of once extrusion again, so that the surface of the plate skin produced by the technical scheme is smooth, and hidden cracks cannot exist; it should be noted that the implicit crack referred to in the present invention is not a crack visible to the naked eye, but a crack that appears gradually in practical use of the sheet, and the crack may damage the integrity of the skin of the sheet, so that the surface structure of the sheet is damaged.
As the above-mentioned technical solution of the present invention, preferably, the first input section is connected with the casting section through a first dispersion section.
As the above technical solution of the present invention, preferably, the first dispersion section includes vertical input areas located at both sides and a horizontal input area located in the middle in a transverse direction of the surface layer material conveyance, the surface layer material enters the flat casting cavity of the casting section through the horizontal input area, and the surface layer material enters the vertical casting cavity of the casting section through the vertical input area.
Preferably, the outer layer preparation assembly further comprises a secondary auxiliary runner.
As the above technical solution of the present invention, preferably, the secondary auxiliary flow channel includes a second input section, the casting section, and the cladding section.
As the above-described aspect of the present invention, preferably, the second input section is connected to the casting section through a second dispersion section.
As the above technical scheme of the present invention, preferably, the second dispersion section includes vertical input regions located at both sides and a horizontal input region located in the middle in a transverse direction of the surface layer material conveyance, the surface layer material enters the flat casting cavity of the casting section through the horizontal input region, and the surface layer material enters the vertical casting cavity of the casting section through the vertical input region.
The invention also provides a preparation method of the PVC foam floor, which uses the mould for producing the PVC foam floor and comprises the following steps:
s1, weighing PVC, calcium carbonate, wood powder, bamboo charcoal fiber, a foaming agent and a processing aid, and uniformly mixing to prepare a foaming material;
s2, weighing ASA, color master batch and auxiliary agent, and uniformly mixing to prepare a surface layer material;
s3, performing melt extrusion on the foaming material to a foaming section of a co-extrusion die through a first extruder for foaming, and performing melt extrusion on the surface material to an extrusion section of the co-extrusion die through at least one second extruder for co-extrusion with the foaming material to form a hot-melt sheet;
s4, cooling and shaping the hot-melt plate sequentially through a first cooling device and a second cooling device to obtain a floor plate, wherein the temperature of the first cooling device is 60-70 ℃, and the temperature of the second cooling device is 20-25 ℃;
s5, conveying the floor board to a slitting device for cutting to obtain the foaming floor.
In S4, the cooling device is preferably pre-cooled.
In the technical scheme, the selected die has reasonable structure, and the produced floor has flat surface and no hidden cracks; and through setting up the cooling device that has different temperatures in the foaming mould export for the cooling initial stage cooling rate of sandwich layer is slower when the product is cooled, has avoided the inner core quenching and has led to partial region sandwich layer to appear some micro-dents, makes the phenomenon that the panel surface appears uneven.
In summary, the beneficial effects of the invention are as follows:
1. according to the invention, the inclined plane and the smooth transition zone are arranged in the transition section of the die, so that the surface layer materials can be better fused under the action of extrusion for two times after the multiple strands of materials are converged in the flow delay process, and the formed surface is flat and free of hidden cracks;
2. the material can be better dispersed into the annular casting section during casting through the arrangement of the dispersing section, and the surface after molding is smoother;
3. according to the invention, through multistage temperature control cooling, the cooling rate of the core layer is slower in the initial cooling stage of the product during cooling, and the phenomenon that partial areas of the core layer are slightly recessed due to quenching of the inner core, so that the surface of the plate is uneven is avoided.
Drawings
FIG. 1 is a schematic diagram of a mold in example 1;
FIG. 2 is an enlarged view at g in FIG. 1;
FIG. 3 is a cross-sectional view taken at b-b of FIG. 1;
FIG. 4 is a cross-sectional view taken at c-c of FIG. 1;
FIG. 5 is a cross-sectional view taken at d-d of FIG. 1;
FIG. 6 is a cross-sectional view taken at e-e of FIG. 1;
FIG. 7 is a cross-sectional view taken at f-f of FIG. 1;
in the figure, the A-block core feeding plate, the B-block outer layer feeding plate, the C-block foaming plate, the a 1-1-main runner, the a 1-foaming core preparation component, the a 2-1-auxiliary runner, the a 2-outer layer preparation component, the a 1-11-non-foaming section, the a 1-12-foaming section, the a 1-13-protruding block, the a 2-2-first input section, the a 2-3-casting section, the a 2-4-cladding section, the a 1-121-non-bonding area, the a 1-122-bonding area, the a 1-123-smooth transition area, the a 1-1231-smooth transition curved surface, the a 2-31-annular casting section, the a 2-32-transition section, the a 2-33-forming section, the a 2-321-inclined slope, the a 2-331-protruding structure, the a 2-332-groove, the a 2-322-transition forming section, the a 2-6-first dispersion section, the a 2-61-vertical input area, the a 2-62-horizontal input area, the a 2-62-2' -2-3-second dispersion section, and the second dispersion section of the second part and the second part of the second part.
Detailed Description
The invention is further explained below with reference to the drawings.
The present embodiments are merely illustrative of the invention and not limiting of the invention, and any changes made by those skilled in the art after reading the specification of the invention will be protected by the patent laws within the scope of the claims.
Example 1
Referring to FIGS. 1-7, a mold for producing PVC foam floor comprises at least a core layer feeding plate A, an outer layer feeding plate B and a foam plate C;
the mold is provided with a foaming core layer preparation component a1 comprising a main runner a1-1 for passing a core layer material and an outer layer preparation component a2 comprising two auxiliary runners a2-1 for passing an outer layer material; the main runner a1-1 comprises a non-foaming section a1-11 and a foaming section a1-12, and protruding blocks a1-13 are arranged on two sides of the main runner a 1-1; the auxiliary flow passage a2-1 comprises a first input section a2-2, a casting section a2-3 and a coating section a2-4, and the foaming section a1-12 of the main flow passage a1-1 extends into the auxiliary flow passage a2-1 from one end of the casting section a 2-3; the foaming section a1-12 comprises a non-bonding area a1-121, a bonding area a1-122 and a smooth transition area a1-123 arranged between the non-bonding area a1-121 and the bonding area a1-122, wherein in the material conveying direction, a smooth transition curved surface a1-1231 is arranged on the inner side of the outer wall of the smooth transition area a1-123, one end of the smooth transition curved surface a1-1231 is connected with the inner side surface of the non-bonding area a1-121, and the other end of the smooth transition curved surface a1-1231 is connected with the outer side surface of the outer wall of the smooth transition area a 1-123;
the casting section a2-3 is sequentially provided with an annular casting section a2-31, a transition section a2-32 and a forming section a2-33 along the flow direction of the material; the annular casting sections a2-31 are runners with rectangular annular sections; the outer walls of the flow channels of the transition sections a2-32 are four inward inclined planes a2-321; the middle parts of two sides of the outer wall of the forming section a2-33 are provided with inward protruding structures a2-331, and the side surfaces of the protruding blocks a1-13 in the forming section a2-33 are provided with grooves a2-332 matched with the protruding structures a 2-331; on both sides of the transition section a2-32 are transition shaped portions a2-322 which transition to form the grooves a2-332 and the protruding structures a 2-331.
In the mold of this embodiment, as shown in fig. 3, the mold includes an auxiliary runner a2-1 for inputting an upper surface layer material and an auxiliary runner a2-1' for inputting a lower surface layer material, wherein the first input section a2-2 is connected with the casting section a2-3 through a first dispersion section a 2-6; the first dispersion section a2-6 comprises vertical input areas a2-61 positioned at two sides and horizontal input areas a2-62 positioned in the middle in the transverse direction of surface material conveying, the surface material enters the flat casting cavity of the casting section a2-3 through the horizontal input areas a2-62, and the surface material enters the vertical casting cavity of the casting section a2-3 through the vertical input areas a 2-61; the outer layer preparation component a2 also comprises a secondary auxiliary runner a2-1'; the secondary auxiliary flow channel a2-1' comprises a second input section a2-5, the casting section a2-3 and the coating section a2-4; the second input section a2-5 is connected with the casting section a2-3 through a second dispersion section a 2-6'; the second dispersion section a2-6' comprises vertical input areas a2-61 positioned at two sides and horizontal input areas a2-62 positioned in the middle in the transverse direction of surface material conveying, the surface material enters the flat casting cavity of the casting section a2-3 through the horizontal input areas a2-62, and the surface material enters the vertical casting cavity of the casting section a2-3 through the vertical input areas a 2-61.
In the present mold, as shown in fig. 1 and 4, the transition molding portion a2-322 includes a protrusion formed by extending inward inclined planes a2-321 on both sides, the protrusion including two side surfaces and a triangular inclined plane having a base connected to the top surface of the protruding structure a2-331, the apex of the triangular inclined plane opposite to the base being connected to the outer wall of the annular casting section a 2-31; the transition molding part a2-322 also comprises a trapezoid-like recess formed by extending the inner wall of the transition section a2-32 towards the direction of the main runner a1-1, wherein the trapezoid-like recess is provided with two guide side surfaces, the guide side surfaces can enable surface materials to be converged into the grooves a2-332, and one end of the inner layer of the trapezoid-like recess is directly butted with the grooves a 2-332.
The die is provided with the smooth transition zone a1-1231 between the non-bonding zone a1-121 and the bonding zone a1-122, the internal size of the non-bonding zone a1-121 is slightly smaller than that of the core layer of the plate, the foam core layer is slightly expanded again in the smooth transition zone a1-1231 to be attached to the surface layer through the guiding of the smooth transition zone a1-1231, and the attaching effect is good, so that the bulge of the finished plate caused by the expansion of the core layer in the bonding zone a1-122 is avoided.
The preparation method of the PVC foam floor board, which uses the mould for producing the PVC foam floor board, comprises the following steps:
s1, weighing PVC, calcium carbonate, wood powder, bamboo charcoal fiber, a foaming agent and a processing aid, and uniformly mixing to prepare a foaming material;
s2, weighing ASA, color master batch and auxiliary agent, and uniformly mixing to prepare a surface layer material;
s3, performing melt extrusion on the foaming material to a foaming section of a co-extrusion die through a first extruder for foaming, and performing melt extrusion on the surface material to an extrusion section of the co-extrusion die through at least one second extruder for co-extrusion with the foaming material to form a hot-melt sheet;
s4, pre-cooling the first cooling device and the second cooling device, and then sequentially cooling and shaping the hot-melt sheet material through the first cooling device and the second cooling device to obtain a floor sheet material, wherein the temperature of the first cooling device is 60-70 ℃, and the temperature of the second cooling device is 20-25 ℃;
s5, conveying the floor board to a slitting device for cutting to obtain the foaming floor.
In the embodiment, the content of each component in the foaming material is 30-50% by weight of PVC, 40-60% by weight of calcium carbonate, 5-8% by weight of wood powder, 5-10% by weight of bamboo charcoal fiber, 10-12% by weight of foaming agent and 10-20% by weight of processing aid, wherein the processing aid comprises a lubricant, a stabilizer, an antioxidant and a foaming aid; the surface layer material comprises 85-90% by weight of ASA, 3-5% by weight of color masterbatch and 5-10% by weight of auxiliary agent, wherein the auxiliary agent comprises a lubricant, a stabilizer, an antioxidant, a plasticizer, a light shielding agent and a colorant.
Example 2
A mould for producing PVC foaming floor comprises at least a core layer feeding plate A, an outer layer feeding plate B and a foaming plate C;
the mold is provided with a foaming core layer preparation component a1 comprising a main runner a1-1 for passing a core layer material, and an outer layer preparation component a2 comprising an auxiliary runner a2-1 for passing an outer layer material; the main runner a1-1 comprises a non-foaming section a1-11 and a foaming section a1-12, and protruding blocks a1-13 are arranged on two sides of the main runner a 1-1; the auxiliary flow passage a2-1 comprises a first input section a2-2, a casting section a2-3 and a coating section a2-4, and the foaming section a1-12 of the main flow passage a1-1 extends into the auxiliary flow passage a2-1 from one end of the casting section a 2-3; the foaming section a1-12 comprises a non-bonding area a1-121, a bonding area a1-122 and a smooth transition area a1-123 arranged between the non-bonding area a1-121 and the bonding area a1-122, wherein in the material conveying direction, a smooth transition curved surface a1-1231 is arranged on the inner side of the outer wall of the smooth transition area a1-123, one end of the smooth transition curved surface a1-1231 is connected with the inner side surface of the non-bonding area a1-121, and the other end of the smooth transition curved surface a1-1231 is connected with the outer side surface of the outer wall of the smooth transition area a 1-123;
the casting section a2-3 is sequentially provided with an annular casting section a2-31, a transition section a2-32 and a forming section a2-33 along the flow direction of the material; the annular casting sections a2-31 are runners with rectangular annular sections; the outer walls of the flow channels of the transition sections a2-32 are four inward inclined planes a2-321; the middle parts of two sides of the outer wall of the forming section a2-33 are provided with inward protruding structures a2-331, and the side surfaces of the protruding blocks a1-13 in the forming section a2-33 are provided with grooves a2-332 matched with the protruding structures a 2-331; on both sides of the transition section a2-32 are transition shaped portions a2-322 which transition to form the grooves a2-332 and the protruding structures a 2-331.
The first input section a2-2 is connected with the casting section a2-3 through a first dispersing section a 2-6; the first dispersion section a2-6 comprises vertical input areas a2-61 positioned at two sides and horizontal input areas a2-62 positioned in the middle in the transverse direction of surface material conveying, the surface material enters the flat casting cavity of the casting section a2-3 through the horizontal input areas a2-62, and the surface material enters the vertical casting cavity of the casting section a2-3 through the vertical input areas a 2-61.
The mold has a smooth transition zone between the non-bonding zones a1-121 and the bonding zones a1-122, the smooth transition zone has a certain guiding effect on foaming of the foaming core layer, can restrict the foaming process of the core layer which is about to enter the bonding zone, the inner side of the outer wall of the smooth transition zone is provided with a smooth transition curved surface, the smooth transition curved surface can limit the foaming of the core layer to a certain extent, and the core layer can be guided to the connecting place of the core layer and the outer layer to enable the core layer and the outer layer to be bonded
The preparation method of the PVC foam floor board, which uses the mould for producing the PVC foam floor board, comprises the following steps:
s1, weighing PVC, calcium carbonate, wood powder, bamboo charcoal fiber, a foaming agent and a processing aid, and uniformly mixing to prepare a foaming material;
s2, weighing ASA, color master batch and auxiliary agent, and uniformly mixing to prepare a surface layer material;
s3, performing melt extrusion on the foaming material to a foaming section of a co-extrusion die through a first extruder for foaming, and performing melt extrusion on the surface material to an extrusion section of the co-extrusion die through at least one second extruder for co-extrusion with the foaming material to form a hot-melt sheet;
s4, pre-cooling the first cooling device and the second cooling device, and then sequentially cooling and shaping the hot-melt sheet material through the first cooling device and the second cooling device to obtain a floor sheet material, wherein the temperature of the first cooling device is 60-70 ℃, and the temperature of the second cooling device is 20-25 ℃;
s5, conveying the floor board to a slitting device for cutting to obtain the foaming floor.
In the embodiment, the content of each component in the foaming material is 30-50% by weight of PVC, 40-60% by weight of calcium carbonate, 5-8% by weight of wood powder, 5-10% by weight of bamboo charcoal fiber, 10-12% by weight of foaming agent and 10-20% by weight of processing aid, wherein the processing aid comprises a lubricant, a stabilizer, an antioxidant and a foaming aid; the surface layer material comprises 85-90% by weight of ASA, 3-5% by weight of color masterbatch and 5-10% by weight of auxiliary agent, wherein the auxiliary agent comprises a lubricant, a stabilizer, an antioxidant, a plasticizer, a light shielding agent and a colorant.
Claims (3)
1. A mould for producing PVC foaming floor comprises at least a core layer feeding plate (A), an outer layer feeding plate (B) and a foaming plate (C);
the mold is provided with a foaming core layer preparation component (a 1) comprising a main runner (a 1-1) for passing a core layer material and an outer layer preparation component (a 2) comprising at least one auxiliary runner (a 2-1) for passing an outer layer material; the main runner (a 1-1) comprises a non-foaming section (a 1-11) and a foaming section (a 1-12), and protruding blocks (a 1-13) are arranged on two sides of the main runner (a 1-1); the auxiliary flow channel (a 2-1) comprises a first input section (a 2-2), a casting section (a 2-3) and a coating section (a 2-4), and a foaming section (a 1-12) of the main flow channel (a 1-1) stretches into the auxiliary flow channel (a 2-1) from one end of the casting section (a 2-3); the foaming section (a 1-12) comprises a non-bonding region (a 1-121), a bonding region (a 1-122) and a smooth transition region (a 1-123) arranged between the non-bonding region (a 1-121) and the bonding region (a 1-122); in the material conveying direction, the outer walls of the smooth transition areas (a 1-123) deflect outwards to form smooth transition curved surfaces (a 1-1231);
the casting section (a 2-3) is sequentially provided with an annular casting section (a 2-31), a transition section (a 2-32) and a forming section (a 2-33) along the flow direction of the material; the annular casting sections (a 2-31) are runners with rectangular annular sections; the outer wall of the flow passage of the transition section (a 2-32) is provided with four inward inclined planes (a 2-321); the middle parts of two sides of the outer wall of the forming section (a 2-33) are provided with inward protruding structures (a 2-331), and the side surfaces of the protruding blocks (a 1-13) in the forming section (a 2-33) are provided with grooves (a 2-332) matched with the protruding structures (a 2-331); transition molding parts (a 2-322) for forming the grooves (a 2-332) and the convex structures (a 2-331) in a transition way are arranged on two sides of the transition sections (a 2-32);
the first input section (a 2-2) is connected with the casting section (a 2-3) through a first dispersing section (a 2-6);
the first dispersion section (a 2-6) comprises vertical input areas (a 2-61) at two sides and horizontal input areas (a 2-62) in the middle in the transverse direction of surface material conveying, the surface material enters the flat casting cavity of the casting section (a 2-3) through the horizontal input areas (a 2-62), and the surface material enters the vertical casting cavity of the casting section (a 2-3) through the vertical input areas (a 2-61);
the outer layer preparation component (a 2) also comprises a secondary auxiliary runner (a 2-1');
the secondary auxiliary flow channel (a 2-1') comprises a second input section (a 2-5), the casting section (a 2-3) and the coating section (a 2-4);
the second input section (a 2-5) is connected with the casting section (a 2-3) through a second dispersion section (a 2-6');
the second dispersion section (a 2-6') comprises vertical input areas (a 2-61) at two sides and horizontal input areas (a 2-62) in the middle in the transverse direction of surface material conveying, the surface material enters the flat casting cavity of the casting section (a 2-3) through the horizontal input areas (a 2-62), and the surface material enters the vertical casting cavity of the casting section (a 2-3) through the vertical input areas (a 2-61).
2. A method for producing a PVC foam floor, characterized in that a mold for producing a PVC foam floor as claimed in claim 1 is used, comprising the steps of:
s1, weighing PVC, calcium carbonate, wood powder, bamboo charcoal fiber, a foaming agent and a processing aid, and uniformly mixing to prepare a foaming material;
s2, weighing ASA, color master batch and auxiliary agent, and uniformly mixing to prepare a surface layer material;
s3, performing melt extrusion on the foaming material to a foaming section of a co-extrusion die through a first extruder for foaming, and performing melt extrusion on the surface material to an extrusion section of the co-extrusion die through at least one second extruder for co-extrusion with the foaming material to form a hot-melt sheet;
s4, cooling and shaping the hot-melt plate sequentially through a first cooling device and a second cooling device to obtain a floor plate, wherein the temperature of the first cooling device is 60-70 ℃, and the temperature of the second cooling device is 20-25 ℃;
s5, conveying the floor board to a slitting device for cutting to obtain the foaming floor.
3. A method of manufacturing a floor according to claim 2, characterized in that in S4, the cooling means are pre-cooled.
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| CN204773481U (en) * | 2015-07-16 | 2015-11-18 | 滁州市精华模具制造有限公司 | Mould of coextru -lamination plastics |
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| CN111571984A (en) * | 2020-05-25 | 2020-08-25 | 安徽森泰木塑科技地板有限公司 | Mold for producing hollow foamed floor |
| CN112443120A (en) * | 2020-12-15 | 2021-03-05 | 安徽森泰木塑科技地板有限公司 | PVC co-extrusion foaming floor and preparation method thereof |
| CN112606359A (en) * | 2020-12-22 | 2021-04-06 | 湖北星科模具有限公司 | Composite forming die for outdoor garden solid pore-free floor |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204773481U (en) * | 2015-07-16 | 2015-11-18 | 滁州市精华模具制造有限公司 | Mould of coextru -lamination plastics |
| CN105522712A (en) * | 2016-01-11 | 2016-04-27 | 广州金发绿可木塑科技有限公司 | Extruding die for preparing continuous long fiber-reinforced PVC wood-plastic products |
| CN111571984A (en) * | 2020-05-25 | 2020-08-25 | 安徽森泰木塑科技地板有限公司 | Mold for producing hollow foamed floor |
| CN112443120A (en) * | 2020-12-15 | 2021-03-05 | 安徽森泰木塑科技地板有限公司 | PVC co-extrusion foaming floor and preparation method thereof |
| CN112606359A (en) * | 2020-12-22 | 2021-04-06 | 湖北星科模具有限公司 | Composite forming die for outdoor garden solid pore-free floor |
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| CN113844004A (en) | 2021-12-28 |
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