WO2016041512A1

WO2016041512A1 - Extrusion mold and manufacturing method for composite plate material formed by coextrusion

Info

Publication number: WO2016041512A1
Application number: PCT/CN2015/089866
Authority: WO
Inventors: 赵永生; 邱洪
Original assignee: 北新集团建材股份有限公司
Priority date: 2014-09-17
Filing date: 2015-09-17
Publication date: 2016-03-24

Abstract

An extrusion mold and a manufacturing method for a composite plate material formed by coextrusion of a wood plastic, a foaming layer, and a metal section. The extrusion mold (3) comprises a mold body (31) and a first mandrel (34). A mold cavity and a shaping cavity flow channel gap (33) for a molten wood plastic to flow are formed on the mold body (31). The first mandrel (34) is provided in the mold cavity. The first mandrel (34) is provided with a shape and structure fitting an opening-shaped metal section (2). The shaping flow channel gap (33) used for the molten wood plastic material to flow also is provided between the surface of the metal section (2) and the mold (3). The extrusion mold (3) is provided with a foaming layer flow channel (35). The foaming layer flow channel (35) sequentially runs through the mold body (31), the shaping flow channel gap (33), and the first mandrel (34) to an outlet extremity of the extrusion mold (3) and enters a first cavity for foaming, thus forming the foaming layer (4). As such, the wood plastic, and the foaming layer form one composite whole, thermal insulation and soundproof performances of the composite plate material are enhanced, and excessive flow of the molten wood plastic fluid into the first cavity is prevented.

Description

Extrusion die for co-extruded composite sheet and preparation method thereof

Technical field

This paper relates to, but is not limited to, the processing of composite sheets, and more particularly to an extrusion mold for a composite sheet of co-extruded wood-plastic, foamed and metal profiles and a method for preparing the composite sheet.

Background technique

The wall of traditional house construction, the use of solid clay bricks is not conducive to the protection of cultivated land; currently aerated concrete blocks, hollow bricks and other wall materials, to be on-site construction, requires cement wet work, a large amount of construction waste generated on site, and consumes a large amount of labor The dimensional accuracy of the wall is also difficult to control, and the construction period is long, and it is less than half a year, often up to one year or even two years to complete.

Chinese patent CN 202915032U provides a wood-plastic profile and an extrusion die for the same, the wood-plastic profile comprising a wood-plastic profile body, the two ends of the wood-plastic profile body are symmetrically provided with concave bayonet, wood-plastic profile body The center position is provided with a slot, and one end of the slot is a circular arc structure. The extrusion die comprises a mold body and a core, the core is placed in the mold body, and the core and the mold body are connected to each other through a connecting rib; a split cone is arranged at one end of the core; one end of the mold body is connected with the extrusion mechanism; The cross section corresponds to the section of the slot in the hollow position of the wood-plastic profile.

Chinese patent application CN102650367A provides composite coextrusion profiles of metal and resin with holes or pits. The metal profiles and resins are manufactured by a co-extrusion process through an extruder. The molten resin is embedded in the holes or pits of the metal profiles and the holes or pits. The metal profiles are integrated into one. Resins include: PVC, PE, PP, ABS, fluororesin, wood plastic, glass plastic.

Summary of invention

The inventors have found that the extrusion die provided by CN 202915032U can only produce wood-plastic profiles, but cannot produce composite profiles of metal profiles, foam layers and wood-plastic composites.

The inventors have also found that the density of wood-plastic composites is 3-4 times that of traditional wood products, the ductility and impact resistance are degraded, the materials are brittle, and the mechanical strength (stretching and bending) is smaller than that of unfilled plastics. application. Therefore, in the Chinese patent application CN102650367A, if foaming technology is used When the performance of the profile is improved, on the one hand, the density of the wood-plastic foam becomes smaller, resulting in a decrease in the hardness of the outer surface of the profile and a decrease in the surface strength, thereby limiting the application. On the other hand, the foaming of the wood-plastic foam is insufficient to provide a sufficiently low heat transfer coefficient, which is difficult to satisfy. Insulation performance requirements.

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

An embodiment of the present invention provides an extrusion die for a composite sheet of co-extruded wood-plastic, foamed layer and metal profile, the metal profile being an open-shaped metal profile, the extrusion die comprising

Mold body and first core,

Wherein the mold body is provided with a cavity,

The mold body is formed with a through cavity, the first core is disposed in the cavity; the first core is provided with an outer structure matched with an open metal profile, the first core The surface is adhered to the metal profile, and a cavity flow channel gap for the molten wood plastic material to flow out between the surface of the metal profile and the wall surface of the cavity is located on the surface of the first core of the opening portion of the metal profile and a cavity flow channel gap for flowing molten wood plastic material is disposed between the wall surfaces of the cavity; the extrusion die is provided with a foam layer flow path, and the foam layer flow path sequentially passes through the mold body, The cavity runner slit and the first core reach the exit end of the extrusion die.

Optionally, the foam layer flow path includes a first flow path and a second flow path, and the first flow path and the second flow path respectively pass through the mold body, the cavity flow path slit and the first core respectively. Reach the exit end of the extrusion die.

Optionally, the extrusion die further includes one or more second cores, between the second cores and between the second core and the wall surface of the mold cavity and the second mold A cavity runner gap for the flow of molten wood plastic material is provided between the core and the first core or metal profile.

Optionally, the mold body comprises a split template, a forming template and an outlet template which are connected in sequence.

Optionally, the mold body comprises a protective template, a split template, a forming template and an outlet template which are sequentially connected.

Optionally, one ends of the first core and the second core are connected to the split template, the outlet template or the forming template.

Optionally, the diverting template is provided with a wood plastic feeding port, and the wood plastic feeding port is in communication with the cavity flow channel slit.

Optionally, an inlet of the foam layer flow channel is disposed on the split template and the outlet template forming template.

Optionally, a confluent tube is disposed outside the outlet end of the extrusion die, and the first flow channel and the second flow channel are respectively in communication with the confluence tube.

Optionally, the portion of the foam layer flow passage that passes through the cavity flow passage slit includes a hollow branching shuttle.

The embodiment of the invention further provides a method for preparing a composite sheet of co-extruded wood-plastic, foamed layer and metal profile, wherein the extrusion die of the composite plate is co-extruded, and the metal profile is an open metal a profile; the preparation method comprises the following steps:

Feeding an open metal profile into the cavity, inserting the first core into the metal profile; and connecting the metal profile fed into the cavity and the wall of the first core to the cavity There is a cavity flow channel gap for the molten wood plastic material to flow out;

While feeding the metal profile, the molten wood plastic material is fed into the cavity flow channel slit, and a portion of the molten wood plastic material flowing through the cavity flow channel slit is on the surface of the metal profile Forming a thermal bond, the other portion flows out of the extrusion die, the molten wood plastic material and the metal profile are integrated into a wood-plastic frame, the wood-plastic frame comprising the first chamber containing the metal profile;

When the wood plastic frame is sent out from the outlet end of the extrusion die, the raw material of the foamed layer is fed into the extrusion die through the foaming layer flow path and flows out of the outlet end of the extrusion die into the first cavity. a chamber that is foamed in the first chamber to form the foam layer;

The foamed layer and the metal profile are outputted through the extrusion die in synchronization with the wood-plastic frame, and then cooled and formed by a subsequent additional cooling sizing die to form the composite panel.

Optionally, the foam layer flow path includes a first flow path and a second flow path, and the first flow path and the second flow path sequentially pass through the mold body, the cavity flow path slit and the first core respectively. An outlet end of the extrusion die; when the wood-plastic frame is sent out from the outlet end of the extrusion die, the raw material of the foamed layer is divided into a first prepolymer and a second prepolymer, respectively passing through the first flow path and the second The flow passage enters the extrusion die, merges and feeds into the first chamber or merges in the first chamber, and an addition polymerization reaction occurs. Foaming to form the foamed layer.

Optionally, a confluent tube is disposed outside the outlet end of the extrusion die, and the first flow channel and the second flow channel are respectively connected to the confluence tube; the preparation method further includes: the first prepolymer and a second prepolymer passes through the first flow path and the second flow path, passes through the mold body, the cavity flow path slit and the first core, and then merges in the merge tube, and finally enters the wood plastic frame The first chamber.

Optionally, the extrusion die further includes one or more second cores, and between the second cores and between the second core and the mold body, a wood plastic for injection melting is provided. a cavity flow channel gap in which the material flows, a gap between the surface of the metal profile and the mold for flowing out the molten wood plastic material; the preparation method further includes: feeding the molten wood plastic material into the cavity flow The gap between the inside of the chamber and the surface of the metal profile is combined with the metal profile after the subsequent cooling, and the wood-plastic frame integrated with the metal profile includes an outer layer and a separate inner rib.

Optionally, the metal profile is provided with a plurality of preformed holes, and the preparation method further comprises: injecting or passing the molten wood plastic material into the preformed holes of the metal profile to form a mosaic structure.

The embodiment of the invention further provides a co-extruded composite panel comprising a wood plastic frame, a foam layer and a metal profile, the wood plastic frame being provided with a first chamber, the wood plastic frame being a wood plastic composite material Wood-plastic frame,

The metal profile is an open metal profile, the metal profile is located inside the first chamber, and the wall surface of the first cavity is bonded to the surface of the metal profile.

The foam layer is filled in a space surrounded by the first chamber and the metal profile, and the foam layer is respectively bonded to a wall surface of the first chamber and a surface of the metal profile, the foam layer It is a layer of foamed material.

Optionally, the metal profile is provided with a plurality of pre-formed holes, and the first chamber of the wood-plastic frame is provided with protrusions embedded in or through the pre-formed holes, the protrusions being integrally formed with the wood-plastic frame.

Optionally, the composite panel further includes one or more second chambers.

Optionally, one or more first spaced inner ribs are disposed within the wood plastic frame parallel to the plane of the composite sheet.

Optionally, one or more passes perpendicular to the composite sheet are disposed in the wood-plastic frame Two separate inner ribs.

Optionally, one end of the composite plate is provided with a tenon, and the other opposite end is provided with a groove, and the tenon of one composite plate can be mated with the groove of the other composite plate.

Optionally, one end of the composite plate is provided with a stepped structure, and the other opposite end is provided with a stepped structure, and one composite plate step structure can be coupled with the step structure of another composite plate.

Optionally, the wood plastic frame comprises the following parts by weight of raw materials:

Polyethylene or polypropylene or polyvinyl chloride or chlorinated polyvinyl chloride or polymethyl methacrylate 30 to 98 parts by weight;

The wood powder may be one or more of rice husk powder, wood powder, bamboo powder, peanut shell powder, crop orange powder, corn core powder, shaving powder and waste paper powder.

The wood flour has an aspect ratio of less than 40:1.

Optionally, the foamed layer comprises the following parts by weight of raw materials:

Optionally, the foamed layer comprises, for example, a component A material and a component B material,

The A component raw material includes the following raw materials by weight:

The B component materials include:

Isocyanate 30.0 to 90.0 parts by weight.

Optionally, the metal profile has a U-shaped, C-shaped or semi-enclosed open profile shape.

Optionally, the metal profile has a wall thickness of 0.3-8.0 mm.

Optionally, the foamed layer is made of a foamed polyurethane material.

The co-extruded composite sheet material described above can be prepared by the co-extruded composite sheet of wood-plastic, foamed layer and metal profile provided by the embodiment of the invention, and the composite of wood-plastic, foamed layer and metal profile co-extrusion. The extrusion die of the sheet is prepared to achieve.

The extrusion die provided by the embodiment of the invention can produce a composite plate with a metal profile, a foamed layer and a wood-plastic composite, and selects an open-type metal profile without using a closed shape, thereby ensuring the basic strength of the wall plate and saving the steel. The amount of use, while creating a strip for the extrusion of the mold to achieve foaming materials a foaming layer flow channel is disposed in the extrusion die, and the raw material of the foaming layer can enter the first cavity through the foaming layer flow passage from the opening portion of the metal profile, and then foam in the first cavity to form The foamed layer, such that the wood plastic, the metal profile and the foamed layer form a composite whole, enhances the thermal insulation performance of the composite panel, and also prevents the molten wood plastic fluid from flowing excessively into the first chamber.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings are intended to provide a further understanding of the embodiments of the invention. In the drawing:

Figure 1 is a schematic view showing an outlet end of an extrusion die in Embodiment 1 of the present invention;

Figure 2 is a schematic cross-sectional view taken along line A1-A1 of Figure 1;

Figure 3 is a cross-sectional view of the branching shuttle of Figure 2 taken along the B1-B1 direction;

4 is a schematic cross-sectional view showing a co-extruded composite sheet according to Embodiment 1 of the present invention;

Figure 5 is a schematic cross-sectional view showing a metal profile according to Embodiment 1 of the present invention;

Figure 6 is a partial schematic view showing the surface of a metal profile according to Embodiment 1 of the present invention;

Figure 7 is a schematic view showing an outlet end of an extrusion die in Embodiment 2 of the present invention;

Figure 8 is a cross-sectional view showing a co-extruded composite sheet according to Embodiment 2 of the present invention;

Figure 9 is a schematic cross-sectional view showing a metal profile according to Embodiment 2 of the present invention;

10-16 are schematic cross-sectional views showing a co-extruded composite sheet according to Embodiment 3-9 of the present invention;

Figure 17 is a schematic view showing the outlet end of the extrusion die in Embodiment 10 of the present invention;

Figure 18 is a cross-sectional view taken along line A11-A11 of Figure 17;

Figure 19 is a cross-sectional view showing the B11-B11 direction of the splitter shuttle of Figure 18.

LIST OF REFERENCE NUMERALS: 1-wood frame, 11-first partition inner rib, 12-second partition inner rib, 13-first tenon, 14-first groove, 15-step structure, 2-metal profile, 21-Preformed hole, 3-extrusion die, 31-mold body, 311-protective template, 312-split template, 313-formed template, 314-export die Plate, 32-second core, 33-cavity runner slit, 331-wood plastic feed inlet, 34-first core, 35-first runner, 351-inlet, 36-second runner, 37 - Confluence tube, 38-split shuttle, 4-foam layer

Detailed description of the invention

Specific embodiments of the present invention will be described in detail below. It is to be understood that the specific embodiments described herein are merely illustrative and not restrictive.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

Example 1

(1) Weighing raw materials:

The raw material of the wood-plastic frame 1 is weighed: 40 parts by weight of polyvinyl chloride, wood powder (wood powder, aspect ratio less than 40:1, particle diameter less than 1 mm) 35 parts by weight, foaming agent 2.6 parts by weight, inorganic filler 10 Parts by weight, 8 parts by weight of the impact modifier, 2 parts by weight of the lubricant, 2 parts by weight of the stabilizer, 2 parts by weight of the compatibilizer, and 1 part by weight of the processing aid.

Raw material of the foamed inner layer: 70 parts by weight of polystyrene, 10 parts by weight of flame retardant, 5 parts by weight of cell regulator, 3 parts by weight of modifier, 1 part by weight of processing aid, and 5 parts by weight of chemical foaming agent And inorganic reinforcing agent 6 parts by weight.

(2) Manufacturing process:

Firstly, the porous plate structure is prefabricated by stamping, drilling, etc. on the surface of the metal plate such as steel plate or aluminum plate, and then processed into an open profile according to the sectional design, wherein the cross section of the profile may be U-shaped, A C-shaped or semi-enclosed profiled shape, in the present embodiment, a metal profile as shown in Figures 5 and 6 can be used.

The composite sheet is co-extruded by an extrusion die 3, and the extrusion die 3 includes a die body 31 and a first core 34. The first core 34 is disposed in a cavity formed on the die body 31, and the open metal profile 2 is The guide rolls precisely positioned up, down, left, and right are fed into the cavity of the extrusion die 3, and the direction of the arrow in Fig. 2 is the feeding direction of the metal profile 2. The first core 34 is inserted into the metal profile 2, and since the first core 34 is provided with an outer shape structure that cooperates with the open metal profile 2, the surface of the first core 34 is bonded to the metal profile 2 and fed into the die. The metal profile 2 of the cavity and the first core 34 are interposed between the wall of the cavity and the cavity In the cavity flow path slit 33.

The raw materials of the above-mentioned wood plastic frame 1 are mixed and added to the hopper of the first extruder, and then the molten wood plastic material is extruded. While feeding the metal profile 2, the molten wood plastic material is sent into the cavity flow channel slit 33, and is thermally bonded to the metal profile 2 to form a wood plastic frame 1 integrated with the metal profile 2, the wood plastic frame 1 comprises a first chamber surrounding the metal profile 2. The molten wood plastic material is injected or passed through the preformed holes 21 of the metal profile 2 to form inlaid protrusions. When the extrusion die 3 is provided with one or more second cores 32, a cavity flow path slit 33 for injecting molten wood plastic material is disposed between the mold bodies 31, and the molten wood plastic material is fed into the mold. The cavity flow path slit 33, which is integrated with the metal profile 2 at the cavity flow path slit 33, includes an outer layer and a separate inner rib.

When the wood-plastic frame 1 is fed out from the outlet end of the extrusion die 3, the raw material of the foamed layer 4 is introduced into the extrusion die 3 through the first flow path 35, passes through the outlet end of the extrusion die, and is then sent to the first chamber. The first chamber is foamed to form the foamed layer 4.

Finally, the wood-plastic frame 1, the foamed layer 4 and the metal profile 2 are simultaneously passed through the extrusion die 3, and then the wood-plastic frame 1, the foamed layer 4 and the metal profile 2 are cooled to room temperature by a subsequent conventional cooling sizing die, wood-plastic The frame 1 and the foamed layer 4 are completely cured to form a composite sheet of the wood-plastic frame 1, the foamed layer 4 and the metal profile 2, which are pulled by a uniform speed tractor, and cut and packaged into the storage according to the necessity.

(3) Extrusion die:

Referring to Figures 1 and 2, a specific extrusion die 3 includes a mold body 31 and a first core 34, and a wood-plastic feed port 331 of the mold is coupled to the extruder. The mold body 31 further includes a protection template 311, a shunt template 312, a molding template 313 and an outlet template 314 which are sequentially connected by bolts. The protection template 311 is disposed only to facilitate the guiding entry of the metal profile and prevent the shunt template 312 from being worn. The protective template 311 is worn and is easy to replace, and the split template 312 is provided with a wood plastic feeding port 331 and is connected to the extruder, which is inconvenient to replace after being worn. The mold body 31 may also not include the protective template 311.

The first core 34 is disposed in the extrusion die 3, and the first core 34 is provided with a shape matching the semi-open metal profile 2, and the open metal profile is opened when the open metal profile 2 passes through the cavity. 2 is tightly wrapped around the outside of the first core 34; between the mating metal profile 2 and the first core 34 and the wall surface of the cavity, a cavity flow gap for injecting molten wood plastic material is provided. 33. The extrusion die 3 is provided with a first flow path 35, and the first flow path 35 sequentially passes through the mold body 31. The cavity runner slit 33 and the first core 34 enter the first chamber. The foamed material enters the first chamber through the first flow passage 35.

In order to provide two or more compartments in the composite sheet, one or more second cores 32 may also be provided in the extrusion die 3. There is a cavity flow channel slit 33 for injecting molten wood plastic material between the second core 32 and the mold body 31, between the second core 32 and the second core 32 and the metal profile 2, the first core There are also cavity flow gaps between the 34 for injecting the molten wood plastic material. These cavity flow passages are connected to each other, and the molten wood plastic material is injected to form the wood plastic frame portion of the composite sheet.

In order to fix the first core 34 and the second core 32 in the extrusion die 3, the first core 34 and the second core 32 may be connected to the mold body 31 through connecting ribs, respectively, as shown in FIG. One end of a core 34 and the second core 32 may also be connected to the split template 312 or the forming template 313 or the outlet template 314 by bolts, respectively, to achieve fixing.

The mold shown in Figs. 1 and 2 can be used to manufacture the composite sheet shown in Fig. 4. As shown in Figs. 1 and 2, the extrusion mold 3 includes a first core 34 and two second cores 32.

The first core 34 is provided with an outer shape that cooperates with the semi-open metal profile 2, and when the open metal profile 2 passes or is fed into the cavity, the open metal profile 2 is tightly surrounded by the first The outside of the core 34. A cavity channel slit 33 for injecting molten wood plastic material is disposed between the mating metal profile 2 and the first core 34 and the second core 32 and the wall surface of the cavity, such that the molten wood plastic material enters these The cavity flow path slit forms the outer layer of the wood plastic frame 1.

A cavity channel gap for injecting molten wood plastic material is disposed between the matching metal profile 2 and the first core 34 and the second core 32, such that the molten wood plastic material enters the mating metal profile 2 and The cavity flow path gap between the first core 34 and the two second cores 32 is cooled to form a first dividing inner rib 11 parallel to the plane of the composite sheet.

The two second cores 32 are disposed with each other with a cavity flow channel slit for injecting molten wood plastic material, and the molten wood plastic material enters the cavity flow channel gap between the two second cores 32, After cooling, a second dividing inner rib 12 may be formed, and the second dividing inner rib 12 is perpendicular to the first dividing inner rib 11.

The first dividing inner rib 11 and the second separating inner rib 12 separate the wood plastic frame 1 into a first partition a chamber and two second compartments, the wall of the first compartment is bonded with a metal profile 2 and filled with a foam layer 4, respectively, with the wall of the first chamber and the metal profile 2 Surface bonding; the other two second compartments are vacant. The shapes of the cross sections of the two second cores 32 correspond to the cross sections of the two second compartments, respectively.

The forming template 313 is provided with an inlet 351 for foaming material, and the inlet 351 is in communication with the first flow path 35, so that the molten material in the molten state enters the first chamber through the inlet 351 and the first flow path 35, and then proceeds in the first chamber. Foaming, thereby forming the foamed layer 4.

The split template 312 is provided with a wood plastic feed port 331, and the molten wood plastic material extruded from the extruder can enter the split template 312 from the wood plastic feed port 331 and enter the cavity flow path after being shunted by the split template 312. Gap.

As shown in Figures 2 and 3, in order to reduce the resistance of the first flow path 35 to the molten wood plastic material, a section of the first flow path 35 in the cavity flow path slit 33 is constituted by a hollow branching shuttle 38. The splitter shuttle 38 has a fusiform structure.

(4) Composite sheet

The two ends of the composite sheet produced are respectively provided with a stepped structure 15, and a composite sheet stepped structure 15 can be coupled with the stepped structure 15 of the other composite sheet.

(5) Metal profiles

In this embodiment, the metal profile 2 shown in Figures 5 and 6 is used. The metal profile 2 comprises a web and two side flaps, and the edges of the two wings are provided with hooks which are bent or inwardly, so that the metal profile 2 can be formed into an open shape. Metal profile 2. The webs and/or the side flaps are provided with prefabricated holes 21. The web of the metal profile 2 is bonded to the first dividing inner rib 11 of the composite sheet.

Example 2

This embodiment produces a composite sheet as shown in Fig. 8. The preparation method and raw materials are basically the same as those in the first embodiment. The difference is that the extrusion die shown in Fig. 7 and the metal profile shown in Fig. 9 are used. The metal profile 2 of Fig. 7 is different from the metal profile 2 of Fig. 1 in the composite sheet, and the web of the metal profile 2 is bonded to the outer layer of the composite sheet (close to the inner wall of the composite sheet surface). Fig. 7 is substantially the same in cross-sectional view at the same cutting position as Fig. 1, with only some differences in size.

Extrusion Mold: The mold shown in FIG. 7 can produce the composite sheet shown in FIG. 8. As shown in FIG. 7, the extrusion mold 3 includes a first core 34 and three second cores 32.

The first core 34 is provided with an outer shape that cooperates with the semi-open metal profile 2, and the metal profile 2 is half surrounded by the first core 34 when the open metal profile 2 passes through the cavity. A cavity channel gap for injecting molten wood plastic material is disposed between the mating metal profile 2 and the first core 34 and the second core 32 and the wall surface of the cavity, such that the molten wood plastic material enters these types. The cavity runner gap forms the outer layer of the wood plastic frame 1.

A cavity channel gap for injecting molten wood plastic material is disposed between the mating metal profile 2 and the first core 34 and the three second cores 32, such that the molten wood plastic material enters the mating metal profile. 2 and a cavity flow path gap between the first core 34 and the three second cores 32, forming a first dividing inner rib 11 of the wood-plastic frame parallel to the plane of the composite sheet.

A cavity flow channel slit for injecting molten wood plastic material is disposed between the three second cores 32 such that the molten wood plastic material enters the cavity flow path gap between the three second cores 32, and is cooled. The second dividing inner rib 12 of the two wood-plastic frames may be formed later, and the second dividing inner rib 12 is perpendicular to the first dividing inner rib 11.

The first dividing inner rib 11 and the second separating inner rib 12 partition the wood plastic frame 1 into a first dividing chamber and three second dividing chambers, the wall surface of the first dividing chamber being bonded with the metal profile 2, and The foamed layer 4 is filled, and the foamed layer 4 is bonded to the wall surface of the first chamber and the surface of the metal profile 2, respectively; the other three second compartments are vacant. The cross-sectional shapes of the three second cores 32 correspond to the three second partition chamber cross-sections, respectively.

Composite sheet: Since the shape of the extrusion die is different from that of Example 1, the shape of the composite sheet produced is different. As shown in FIG. 8, the composite sheet produced is provided with a first tenon 13 at one end and a first recess 14 at the opposite end, and the first tenon 13 of one composite sheet can be combined with another composite sheet. The first groove 14 is mated with the same.

Metal profile: This embodiment adopts the metal profile 2 shown in Fig. 16. The metal profile 2 comprises a web and two side flaps, and the edges of the two wings are provided with hooks which are bent or inwardly, so that the metal profile 2 can be formed into an opening shape. The metal profile 2, the metal profile 2 is not provided with pre-formed holes 21. Since the preformed holes are not provided, the molten wood-plastic material does not form protrusions embedded in or through the preformed holes when bonded to the metal profile 2.

Example 3

The composite sheet shown in FIG. 10 is produced, and the preparation method and raw materials thereof are basically the same as those in the second embodiment, and the difference lies in:

Extrusion die: the extrusion die 3 is only provided with the first core 34, and the second core 32 is not provided, and the first core 34 is provided with an outer shape matching the semi-open metal profile 2, so that when the opening When the metal profile 2 is passed through the cavity, the open metal profile 2 is tightly surrounding the outside of the first core 34. A cavity channel gap for injecting molten wood plastic material is disposed between the mating metal profile 2 and the first core 34 and the second core 32 and the wall surface of the cavity, such that the molten wood plastic material enters the cavity After the runner gap, a wood-plastic frame 1 of composite sheet is formed on the periphery of the sealing body. After cooling, the composite sheet has only one first chamber, and the metal profile 2 is bonded in the first chamber, and the foam layer is also Filled and bonded in the first chamber.

Metal Profile: This embodiment employs the metal profile 2 shown in FIG. 10, which is substantially the same as Embodiment 2, except that the metal profile 2 is provided with a preformed hole 21. One wing of the metal profile 2 is provided with a similarly shaped second tenon inside the first tenon 13, the convex direction of the second tenon facing the outside of the metal profile 2, and the other flap in the first recess 14 The interior is provided with a second recess similar to the first recess 14, the second recess opening direction facing the exterior of the metal profile 2.

Example 4

The composite sheet material shown in FIG. 11 is produced, and the preparation method and raw materials thereof are basically the same as those in the second embodiment.

The difference is that only one first core 34 and one second core 32 are provided in the extrusion die 3, and the metal profile 2 shown in Fig. 11 is used, and the metal profile 2 is provided with a preformed hole 21. As shown in FIG. 11, the composite sheet produced is provided with a first dividing inner rib 11 parallel to the plane of the wood-plastic frame 1, and a first separating inner rib 11 separates the wood-plastic frame 1 into a first separating chamber and A second compartment, the wall of the first compartment is bonded to the metal profile 2, and the foam layer is filled and bonded, and the other second compartment is vacant.

Example 5

The composite sheet material shown in FIG. 12 is produced, and the preparation method and raw materials thereof are basically the same as those in the second embodiment.

The difference is that only one first core 34 and two second cores 32 are provided in the extrusion die 3, and the metal profile 2 shown in Fig. 12 is used, and the metal profile 2 is provided with a preformed hole 21. As shown in FIG. 12, the produced composite sheet is provided with two first dividing inner ribs 11 parallel to the plane of the wood-plastic frame 1, and the two first separating inner ribs 11 divide the wood-plastic frame 1 into a first separating chamber. And two second compartments, the wall surface of the first compartment is bonded with the metal profile 2, and the foam layer is filled and bonded, and the two second compartments are vacant.

Example 6

The composite sheet material shown in FIG. 13 is produced, and the preparation method and raw materials thereof are basically the same as those in the second embodiment.

The difference is that a first core 34, three large models of the second core 32 and a small second mold core 32 are disposed in the extrusion die 3, and the metal profile 2 shown in FIG. 13 is used. The metal profile 2 is provided with prefabricated holes 21. As shown in Fig. 13, the composite sheet produced is provided with two first dividing inner ribs 11 and two second separating inner ribs 12 parallel to the plane of the wood-plastic frame 1, two first separating inner ribs 11 and two first The two partition inner ribs 12 divide the wood plastic frame 1 into a first partition chamber and three second partition chambers, the wall surface of the first partition chamber is bonded with the metal profile 2, and the foam layer is filled and bonded 4. Three second compartments are vacant. The metal profile 2 of Figure 13 is interchangeably with the metal profile 2 of Figure 1 .

Example 7

The composite sheet shown in Fig. 14 is produced, and the preparation method and raw materials thereof are basically the same as those in the first embodiment, and the difference lies in:

A first core 34 is disposed in the extrusion die 3.

Metal profile: This embodiment employs the metal profile 2 shown in Fig. 14, which is basically the same as that of the embodiment 1, except that one blade of the metal profile 2 is provided with a stepped structure at its intermediate portion.

Composite sheet: There is only one first partition chamber, and the first partition chamber is bonded with the metal profile 2, and the foam layer is filled and bonded. The metal profile 2 of Figure 14 is different from the metal profile 2 of Figure 1 in the composite panel, the web of the metal profile 2 of Figure 14 and the outer layer of the composite panel (by The inner wall of the surface of the composite sheet is bonded to each other, and the web of the metal profile 2 of Fig. 1 is bonded to the first dividing inner rib 11.

Example 8

The composite sheet material shown in FIG. 15 is produced, and the preparation method and raw materials thereof are basically the same as those in the first embodiment.

The difference is that a first core 34 and a second core 32 are disposed in the extrusion die 3, and the metal profile 2 shown in Fig. 15 is used.

As shown in Fig. 15, the composite sheet produced is provided with a first dividing inner rib 11 parallel to the plane of the wood plastic frame 1, and the first dividing inner rib 11 divides the wood plastic frame 1 into a first separating chamber and a The second partitioning chamber has a metal profile 2 adhered to the wall surface of the first partitioning chamber, and a foamed layer is filled and bonded, and the second partitioning chamber is vacant. The metal profile 2 of Fig. 15 is different from the metal profile 2 of Fig. 1 in the composite sheet, and the web of the metal profile 2 of Fig. 15 is bonded to the outer layer of the composite sheet (near the inner wall of the composite sheet surface).

Example 9

The composite sheet shown in FIG. 16 is produced, and the preparation method and raw materials thereof are basically the same as those in the first embodiment.

The difference is that a first core 34 and two second cores 32 are disposed in the extrusion die 3, and the metal profile 2 shown in Fig. 16 is used.

As shown in FIG. 16, the composite sheet produced is provided with a first separating inner rib 11 parallel to the plane of the wood plastic frame 1 and a second separating inner rib 12 perpendicular to the plane of the wood plastic frame 1, the first separating inner rib 11 and the second separating inner rib 12 divides the wood plastic frame 1 into a first separating chamber and two second separating chambers, the wall surface of the first separating chamber is bonded with the metal profile 2, and is filled and bonded Foam layer, two second compartments are vacant. The metal profile 2 of Fig. 16 is different from the metal profile 2 of Fig. 1 in the composite sheet, and the web of the metal profile 2 of Fig. 16 is bonded to the outer layer of the composite sheet (near the inner wall of the composite sheet surface).

Example 10

The difference from Embodiment 1 is that:

(1) The raw materials of the wood-plastic frame 1 and the foamed layer 4 are different:

The raw material of the wood-plastic frame 1 in the present embodiment: 40 parts by weight of polyvinyl chloride, 35 parts by weight of wood powder (wood powder, aspect ratio less than 40:1, particle diameter less than 1 mm), 10 parts by weight of inorganic filler, and anti- 8 parts by weight of the modifier, 2 parts by weight of the lubricant, 2 parts by weight of the stabilizer, 2 parts by weight of the compatibilizer, and 1 part by weight of the processing aid.

Raw material of the foamed layer 4 in this embodiment: divided into A component (ie, first prepolymer) formulation: two polyether polyols, 37 parts by weight of the first polyether polyol; 16 parts by weight of alcohol; 1 part by weight of catalyst; 0.9 parts by weight of silicone oil; 3 parts by weight of blowing agent; 0.3 parts by weight of lubricant; 9 parts by weight of flame retardant; 10 parts by weight of inorganic filler; Formulation: 39 parts by weight of isocyanate.

(2) The number of the foam layer flow paths provided on the extrusion die is different. In the present embodiment, the first flow path 35 and the second flow path 36 are provided, and accordingly, the molding template 313 is provided with a foaming material. An inlet and a second inlet, the first inlet is in communication with the first flow passage 35, the second inlet is in communication with the second flow passage 36; and an outer side of the outlet end of the extrusion die is provided with a confluence tube 37, the first flow passage 35 And the second flow path 36 is in communication with the confluence tube 37, respectively.

Thus, when the wood-plastic frame 1 is fed out from the outlet end of the extrusion die 3, the first prepolymer of the foamed layer 4 passes through the first inlet and the first flow path 35, and the second prepolymer passes through the second inlet and the second flow. The passage 36 then passes through the mold body 31, the cavity flow path slit 33 and the first core 32, into the merge tube 37, and enters the first after the first prepolymer and the second prepolymer merge at the junction tube 37. The chambers are merged or merged in the first chamber, and then subjected to addition polymerization and foaming in the first chamber to form the expanded layer 4. Of course, when the outlet end of the extrusion die is not provided with the confluence tube 37, the first prepolymer and the second prepolymer directly enter the first chamber through the first flow path 35 and the second flow path 36, respectively, and merge.

Further, as shown in FIGS. 17 to 19, in order to reduce the resistance of the first flow path 35 and the second flow path 36 to the molten wood plastic material, the first flow path 35 and the second flow path 36 pass through the cavity flow path slit. The portions of 33 are each formed by a splitter shuttle 38 provided with two hollow passages. The splitter shuttle 38 has a fusiform structure.

Example 11

The production method of Example 11 was the same as that of Example 10 except that the raw materials of the wood-plastic frame 1 and the foamed layer 4 used were different.

The raw material of the wood-plastic frame 1 was weighed: 37 parts by weight of polypropylene (PP), 10 parts by weight of flame retardant, 27 parts by weight of bamboo powder, 10 parts by weight of inorganic filler, 5 parts by weight of impact modifier, and lubricant 1 Parts by weight, 2 parts by weight of a compatibilizer, 3 parts by weight of a foaming agent, and 5 parts by weight of a foaming agent.

Raw materials of the foamed layer 4: 73 parts by weight of polycarbonate, 2 parts by weight of a processing aid, and 6 parts by weight of a foaming agent, 5 parts by weight of an inorganic filler, 4 parts by weight of a cell regulator, and 10 parts by weight of a flame retardant.

Example 12

The production method of Example 12 was the same as that of Example 10 except that the raw materials of the wood-plastic frame 1 and the foamed layer 4 used were different.

The raw material of the wood-plastic frame 1 was weighed: 40 parts by weight of chlorinated polyvinyl chloride, 30 parts by weight of wood powder, 7 parts by weight of an inorganic filler, 8 parts by weight of an impact modifier, 2 parts by weight of a lubricant, and 3 parts by weight of a stabilizer. Parts, 1 part by weight of a compatibilizer, and 1 part by weight of a processing aid.

The raw material of the foamed layer 4: 75 parts by weight of polystyrene, 1 part by weight of a processing aid, and 6 parts by weight of a foaming agent, 10 parts by weight of an inorganic filler, 4 parts by weight of a flame retardant, and 4 parts by weight of a cell regulator.

Test case

The composite sheets prepared in Example 1 and Examples 10-12 (the thickness of the integral wallboard is 180 mm, and the thickness of the outer wood-plastic wall is 10 mm), and the density of the foamed layer and the density of the wood-plastic frame are determined according to JG 169-2005, and according to GB 50222 -1995 Test fire rating, determine the heat transfer coefficient of the sample according to GB/T 13475-2008. The test results are shown in Table 1.

Table 1

According to the data of Table 1, the composite board prepared by the embodiment 1 and the embodiment 10-12 of the invention can be directly used for the heat insulation wall board of the light house, and the whole board thickness can reach 100 mm or more, and the formula is passed through the formula. Adding flame retardant and other methods can achieve flame retardant B2 or B1 grade of composite sheet, and the flame retardant performance is better than that of solid wood house wall. The heat transfer coefficient is lower than 0.40W/(m ² K), and the heat preservation performance is much higher than that of traditional houses such as concrete, aerated concrete and hollow brick. The heat preservation performance is better than that of solid wood house wall.

The embodiments of the invention described herein may be varied without departing from the spirit and scope of the invention as defined in the appended claims. Although the invention may be embodied in many different forms, some embodiments of the invention are described in detail herein. The present disclosure is an exemplification of the invention and is not intended to limit the invention to the specific embodiments shown. Furthermore, the invention includes any possible combination of some or all of the various embodiments described herein.

The above disclosure is intended to be illustrative rather than exhaustive. This description will suggest many variations and alternatives to those skilled in the art. All such alternatives and modifications are intended to be included within the scope of the claims, and the term "comprising" means "including, but not limited to." Those skilled in the art will recognize other equivalents of the embodiments described herein, which are also intended to be encompassed by the appended claims.

A description of alternative embodiments of the invention is set forth herein. Other equivalents to the embodiments described herein will be recognized by those skilled in the art, which are intended to be encompassed by the appended claims.

Industrial applicability

The extrusion die of the co-extruded composite plate of the embodiment of the invention selects the open metal profile of the composite plate, does not adopt the closed shape, not only ensures the basic strength of the wall plate, saves the amount of steel, and realizes the extrusion die. The conditions for the introduction of molten foamed material. a foaming layer flow channel is disposed in the co-extrusion extrusion mold, and the raw material of the foaming layer can enter the metal profile from the opening portion of the metal profile through the foam layer flow channel, and then pass through the first core to enter the first chamber, and then In the first chamber The foaming layer forms a foamed layer, so that the wood plastic, the metal profile and the foamed layer form a composite whole, which enhances the thermal insulation performance of the composite panel.

When the weight is added to the wood-plastic wallboard, the anchoring position can be set in the position of the in-line metal profile, which fundamentally solves the problem of anchoring the weight of the wood-plastic wallboard when hanging heavy objects such as air conditioners and television sets. The part of the plastic wall panel embedded with the metal sheet is screwed or bolted to the load-bearing frame of the house, which fundamentally eliminates the strength and safety hazard of the wood-plastic composite wall panel; at the same time, the overall strength of the wood-plastic material and the metal structure is improved. And disperse the thermal expansion and contraction stress caused by the difference between the metal material and the wood plastic material, and reduce the negative influence of the difference between the two materials due to the change of the ambient temperature on the composite strength, which is beneficial to the composite of the metal profile and the wood plastic. As the overall strength and mechanical strength of the integral wall panel.

Since the internal metal profile effectively provides mechanical strength, the metal profile, the foam layer and the wood-plastic frame are integrated, so the strength requirement of the wood-plastic frame is reduced, and the material of the wood-plastic frame can be foamed, thereby saving wood. Plastic materials also help to improve the insulation and sound insulation performance of wall panels.

(2) The co-extruded composite sheet produced by the embodiment of the invention, the first chamber of the wood-plastic frame is provided with protrusions embedded in or through the pre-formed holes of the metal profile, so that the metal profile forms a mosaic structure with the wood-plastic frame In order to integrate the wood-plastic frame into a metal profile, “you have me and me in you”, further reducing the negative impact of the difference between the two materials due to changes in ambient temperature on the composite strength, and more conducive to the metal profile. The overall strength and mechanical strength of the integral wall panel after compounding with wood-plastic.

(3) The co-extruded composite sheet made by the embodiment of the invention can easily design the indoor and outdoor thickness of the wall panel through the mold according to the heat preservation and strength requirements, the thickness of the wall panel is 100 mm to 600 mm, and the heat transfer coefficient of the wall panel can reach 0.2 W/m. ² K ~ 0.5W / m ² K, is satisfied with the national standard of 65% wall insulation energy saving, more than three times higher than ordinary reinforced concrete wall insulation, no need to increase the installation of insulation layer, has a good insulation effect. At the same time, it also has the characteristics of heat insulation and sound insulation, and has the characteristics of internal and external self-decoration performance and high structural strength. The flame retardant properties of the composite sheet can reach B1.

(4) The co-extruded composite sheet produced by the embodiment of the invention fully combines the high-strength characteristics of the steel and the insulating and sound insulation of the wood-plastic, corrosion-resistant, weather-resistant, non-cracking and non-deformation. It is easy to mold and has good surface decoration. The surface of the board can be coated, embossed, transferred, coated and other surface decoration as needed.

(5) When the co-extruded composite sheet produced by the embodiment of the present invention is used as a wall board, it can be directly cut from the factory according to the drawings, and can be directly transported to the construction site as a building block, and the indoor side of the composite sheet can be Various decoration treatments such as embossing, painting, transfer, and lamination are carried out as needed. The composite panel solves the wall from indoor to outdoor at one time, and has the properties of heat preservation, heat insulation and sound insulation. The indoor and outdoor surfaces no longer need other treatments such as heat preservation, which greatly saves on-site construction time and does not require on-site use of caulking. Agents, surface coatings, nails, foam sealants, etc., significantly improve the construction efficiency of light-duty houses, while the site is almost zero pollution, almost no construction waste remains on site. Rapid construction, the same ground foundation and frame conditions can be completed on the same day.

(5) The co-extruded composite sheet produced by the embodiment of the invention has a cross-section design of the overall composite sheet material as a horizontal and vertical multi-chamber structure, and the multi-chamber structure significantly improves the insulation and sound insulation performance, and only recombines in one of the chambers. Metal profiles, which can solve the anchoring problem of wood-plastic wallboard and hanging weights and load-bearing structures with relatively few metal profiles.

(6) The co-extruded composite sheet produced by the embodiment of the invention, the cross section of the integral composite sheet is designed as a horizontal and vertical multi-chamber structure, and the multi-chamber structure significantly improves the insulation and sound insulation performance, and one or more cavities therein. The interior is filled with a foam layer, which can be designed according to the requirements of insulation, so as to achieve different insulation effects.

(7) In the process of manufacturing, the co-extruded composite sheet of the embodiment of the invention is provided with an accurate combination of the guide roller and the traction machine with accurate positioning accuracy, thereby realizing precise and close bonding of the profiled metal sheet and the wood plastic. Significant savings in process, labor and energy consumption.

Claims

An extrusion die for a composite sheet of a co-extruded wood-plastic, foamed layer and metal profile, the metal profile being an open-shaped metal profile, the extrusion die comprising:

Mold body and first core,

Wherein, the mold body is formed with a through cavity, the first core is disposed in the cavity, and the first core is provided with an outer structure that cooperates with the open metal profile, first The surface of the core is bonded to the metal profile, and a cavity flow channel gap for flowing the molten wood plastic material is disposed between the surface of the metal profile and the wall surface of the cavity, and the surface of the first core located at the opening portion of the metal profile is a cavity flow channel gap for flowing molten wood plastic material between the walls of the cavity;

The extrusion die is provided with a foaming layer flow path which sequentially passes through the mold body, the cavity flow path slit and the first core to the outlet end of the extrusion die.
The extrusion die according to claim 1, wherein the foam layer flow path includes a first flow path and a second flow path, the first flow path and the second flow path respectively sequentially passing through the mold body, The cavity runner slit and the first core reach the exit end of the extrusion die.
The extrusion die according to claim 1 or 2, further comprising one or more second cores, between the second cores, between the second core and the wall surface of the cavity, and A cavity flow path slit for flowing molten wood plastic material exists between the second core and the metal profile or the first core.
The extrusion die according to claim 3, wherein the mold body comprises a split template, a forming template, and an outlet template that are sequentially connected.
The extrusion die according to claim 3, wherein the mold body comprises a protective template, a split template, a forming template, and an outlet template which are sequentially connected.
The extrusion die according to claim 4 or 5, wherein one ends of the first core and the second core are connected to the split template, the forming template or the outlet template.
The extrusion die according to any one of claims 4-6, wherein the splitter template is provided with a wood plastic feed port that communicates with the cavity flow channel slit.
The extrusion die according to any one of claims 4 to 7, wherein an inlet of the foam layer flow path is provided on the split template or the forming template or the outlet template.
The extrusion die according to claim 2, wherein a confluent pipe is provided outside the outlet end of the extrusion die, and the first flow path and the second flow path are each in communication with the confluent pipe.
The extrusion die according to any one of claims 1 to 9, wherein the portion of the foam layer flow passage that passes through the cavity flow passage slit includes a hollow branching shuttle.
A method for preparing a composite sheet of co-extruded wood-plastic, foamed layer and metal profile, wherein the composite panel is co-extruded by the extrusion die according to claim 1, the metal profile being an open metal Profile

The preparation method comprises the following steps:

Feeding an open metal profile into the cavity, inserting the first core into the metal profile, and feeding the metal profile fed into the cavity and the wall of the first core and the cavity There is a cavity flow channel gap for the molten wood plastic material to flow out;

The molten wood plastic material is sent into the cavity flow channel slit, and the molten wood plastic material is partially thermally bonded to the metal profile when flowing through the cavity flow channel slit, and partially flows out of the extrusion die to form a wood-plastic frame integrated with a metal profile, the wood-plastic frame comprising a first chamber surrounding the metal profile;

When the wood plastic frame is sent out from the outlet end of the extrusion die, the raw material of the foam layer is fed into the extrusion die through the foam layer flow passage, and passes through the outlet end of the extrusion die to enter the first cavity. a chamber that is foamed in the first chamber to form the foam layer;

The foamed layer and the metal profile are simultaneously formed into an extrusion die by the extrusion die and then cooled by an additional cooling sizing die to form the composite panel.
The preparation method according to claim 11, wherein the foam layer flow path includes a first flow path and a second flow path, and the first flow path and the second flow path sequentially pass through the mold body and the cavity flow, respectively. The gap and the first core reach the exit end of the extrusion die;

When the wood plastic frame is sent out from the outlet end of the extrusion die, the raw material of the foam layer is divided into a first prepolymer and a second prepolymer, and the extrusion is introduced through the first flow path and the second flow path, respectively. The mold, after being merged, is fed into the first chamber or merged in the first chamber, and an addition polymerization reaction and foaming occur to form the foamed layer.
The production method according to claim 12, wherein at the outlet of the extrusion die The outer side of the end is provided with a merging tube, and the first flow path and the second flow path are respectively connected to the merging tube; the preparation method further includes:

The first prepolymer and the second prepolymer pass through the first flow path and the second flow path, respectively, through the mold body, the cavity flow path slit and the first core, and then merge in the merge tube. Finally enter the first chamber of the wood-plastic frame.
The production method according to any one of claims 11 to 13, wherein the extrusion die further comprises one or more second cores, the second cores, and the second cores Between the wall surfaces of the cavity, and between the second core and the surface of the metal profile or the first core, a cavity flow gap for flowing molten wood plastic material is provided,

The preparation method further includes:

The molten wood plastic material is fed into the cavity flow channel slit, and the formed wood plastic frame integrated with the metal profile comprises an outer layer and a separate inner rib.
The preparation method according to any one of claims 11 to 14, wherein the metal profile is provided with a plurality of preformed holes, and the preparation method further comprises:

The molten wood-plastic material is injected or passed through the preformed holes of the metal profile to form a mosaic structure of the wood-plastic and metal profiles.