WO2016041513A1

WO2016041513A1 - Extrusion mold and manufacturing method for composite plate material formed by coextrusion

Info

Publication number: WO2016041513A1
Application number: PCT/CN2015/089867
Authority: WO
Inventors: 赵永生; 邱洪; 刘素梅; 党连军; 赵铮
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 for a composite plate material formed by coextrusion of a wood plastic and a metal section. The mold comprises a mold body and a partition plate. A mold cavity is provided within the mold body. The partition plate is provided in the mold cavity. The metal section is an opening-shaped metal section. The partition plate is configured to enclose with the metal section fed into the mold cavity. Formed in the mold among constituents of the mold are shaping cavity gaps for a molten wood plastic material to flow. The partition plate, the metal section, and the wall surface of the mold cavity are configured therebetween as gaps used for outflow of the molten wood plastic material. A gap for outflow of the wood plastic material is also provided on an outlet template. The extrusion mold is provided with an air channel. The air channel sequentially runs through the mold body, the shaping cavity gaps, and the partition plate and enters the interior of the enclosure. A gas can pass through an opening part of the metal section via the air channel to enter the interior of a cavity constituted by the metal section and the partition plate, thus cooling the metal section.

Description

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

Technical field

The invention relates to, but is not limited to, the processing of a composite board, in particular to an extrusion die of a composite sheet of metal profiles and wood-plastic co-extrusion and a preparation method of the composite sheet.

Background technique

The wall used for traditional house construction mostly uses solid clay bricks, which is not conducive to the protection of cultivated land; currently, aerated concrete blocks, hollow bricks and other wall materials must be constructed on site, requiring cement wet work, generating a large amount of construction waste on site, and consuming a large amount of Manual, wall size accuracy is also difficult to control, the construction period is long, less than half a year, up to one year or even more than 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.

Summary of invention

The inventor found that the extrusion die provided by the Chinese patent CN 202915032U can only produce wood-plastic profiles, and cannot produce composite sheets of metal profiles and wood-plastic co-extrusion.

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

Embodiments of the present invention provide an extrusion die for an internal gas-assisted cooling metal profile and a wood-plastic co-extruded composite panel.

The embodiment of the invention also provides a preparation method of a composite sheet of metal profiles and wood-plastic co-extrusion.

The embodiment of the invention also provides a composite sheet coextruded with wood plastic and metal profiles.

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

Mold body and partition plate;

A cavity gap is formed between the plurality of metals including the core in the mold, and the cavity gap extends in the mold body until the outlet end of the mold flows out, and the mold body is formed with a gap with the cavity. a wood plastic feed port; wherein the mold body has a cavity formed by a hollow portion in the middle, the partition plate is disposed in the cavity, the open metal profile continuously moves through the cavity, and the metal profile passes through the cavity The opening may be enclosed with a partitioning plate, the inside of which is a hollow cavity, and a cavity gap is provided between the wall surface of the cavity for the molten wood plastic material to flow out to form an inner surface of the wood plastic frame. Wherein, the extrusion die is provided with an air passage which sequentially passes through the mold body, the cavity gap and the partition plate to enter the enclosed interior.

Optionally, the extrusion die comprises one or more cores, the core and other mold components forming a cavity gap in the cavity for injecting molten wood plastic material, the molten wood is in The cavity flows in the gap, a part of which is attached to the surface of the metal profile and moves out of the extrusion die synchronously, and the other parts flow out of the extrusion die synchronously.

Optionally, the mold body comprises a split template, a forming template and an outlet template connected in sequence, the mold cavity penetrating the split template, the forming template and the outlet template, and the wood plastic feeding port is disposed in the split template Upper and configured to be connected to the extruder.

Optionally, the mold body further includes a protection template connected to a side of the distribution template away from the molding template, and the mold cavity passes through the protection template.

Optionally, one end of the partition plate and the core is connected to the split template, the forming template or the outlet template.

Optionally, the molding template is provided with an inlet of the air passage.

Optionally, the portion of the air passage that passes through the cavity gap is comprised of a hollow diverting shuttle.

The embodiment of the invention further provides a method for preparing a composite sheet of a metal profile and a wood-plastic co-extrusion, the composite sheet being co-extruded by an extrusion die, the extrusion die comprising a mold body and a partition plate, The partitioning plate is disposed in a cavity inside the mold body, and the metal profile is an open metal profile; the preparation method comprises the following steps:

The open metal profile is fed into the cavity, and the metal profile forms a metal enclosure with the partition plate provided in the opening portion thereof, and a hollow cavity is enclosed therein, and a cavity gap is formed around the wall surface of the cavity for melting. State wood plastic material flowing out;

While feeding the metal profile, the molten wood plastic material is fed into the cavity gap, the molten wood plastic material flows through the cavity gap, and a part is thermally bonded to the surface of the metal profile, and other parts are wood Plastic outflow extrusion mold, wood plastic material and metal profile composite wood composite frame, the wood plastic frame comprises a first chamber surrounding the metal profile;

While the metal profile and the molten wood plastic material move in the mold cavity, gas passes through the mold body, the cavity gap and the partition plate through the air passage to enter the enclosure, and the metal profile is performed. Internal cooling

The metal profile is passed through the exit end of the extrusion die (ie, the outlet die plate) in synchronization with the wood-plastic frame, and then sufficiently cooled and molded by an external cooling sizing die to form the composite panel.

Optionally, the metal profile is formed with a pre-formed hole, and the preparation method further comprises: injecting or passing the molten wood plastic material into the pre-formed hole of the metal profile to form a mosaic composite structure of the wood-plastic in the metal profile.

Optionally, the extrusion die body further includes one or more cores, and the core and the partition plate and the metal profile are provided with a cavity gap for injecting molten wood plastic material, and the preparation method Also includes:

When the molten wood plastic material is fed into the cavity gap, the wood plastic frame integrated with the metal profile formed by the cavity gap splitting and cooling forming comprises an outer layer and a separating inner rib.

The embodiment of the invention further provides a composite sheet co-extruded with wood-plastic and metal profiles, which comprises a wood-plastic frame and a metal profile.

Wherein the wood-plastic frame is provided with a first chamber, the metal profile is located in the first chamber, and the wall surface of the first chamber is bonded to the surface of the metal profile,

Wherein the wood plastic frame is made of a foamed wood plastic material, and the metal profile is an open metal profile.

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 wood plastic frame is provided with 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 second spaced inner ribs perpendicular to the composite sheet are disposed within the wood plastic frame.

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 step structure, and the other opposite end is provided with a step 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 metal profile has a U-shaped, C-shaped or semi-enclosed profiled shape.

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

The wood-plastic and metal-type co-extruded composite board mentioned above can be prepared by the method of preparing the composite sheet of the metal profile and the wood-plastic co-extrusion provided by the embodiment of the invention, and the composite sheet of the metal profile and the wood-plastic co-extrusion. Extrusion mold preparation is achieved.

The extrusion die of the embodiment of the invention selects the open metal profile without using the closed shape, which not only ensures the basic strength of the wall plate, but also saves the amount of steel, and at the same time creates conditions for the compressed air to be cooled by the extrusion die; The air passage provided in the mold can be used, and during operation, the gas can pass through the open portion of the open metal profile through the air passage, enter the enclosed hollow space formed by the metal profile and the partition plate, and fully utilize the high thermal conductivity of the metal profile. The characteristics of rapid cooling, by adjusting the air flow, control the cooling rate, prevent the molten wood-plastic fluid from flowing too much into the hollow space, and increase the cooling and setting efficiency by increasing the internal cooling, thereby improving production efficiency.

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 output 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 schematic view showing an output end of an extrusion die in Embodiment 2 of the present invention;

Figure 7 is a cross-sectional view showing a co-extruded composite sheet according to Embodiment 2 of the present invention;

Figure 8 is a schematic cross-sectional view showing a metal profile according to Embodiment 2 of the present invention;

9-15 are schematic cross-sectional views showing a co-extruded composite sheet according to Embodiment 3-9 of the present invention;

Figure 16 is a schematic cross-sectional view showing a metal profile according to Embodiment 13 of the present invention;

Figure 17 is a partial schematic view showing the surface of a metal profile according to Embodiment 13 of the present invention.

LIST OF REFERENCE NUMERALS: 1-wood frame, 11-first split inner rib, 12-second split inner rib, 13-first tenon, 14-first groove, 15-step structure, 2-metal profile, 21-Preformed hole, 3-extrusion die, 31-mold body, 311-shield template, 312-split template, 313-formed formwork, 314-outlet formwork, 32-core core, 33-divider plate, 34-type Cavity gap, 341-wood plastic feed inlet, 35-air passage, 351-gas inlet, 36-split shuttle.

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:

In this embodiment, the wood plastic frame may comprise the following parts by weight of raw materials:

In the present embodiment, the raw material of the wood-plastic frame 1 is weighed: 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), and 10 parts by weight of inorganic filler. Parts, impact modifier 8 parts by weight, lubricant 2 parts by weight, stabilizer 2 parts by weight, compatibilizer 2 weight The amount of the processing aid was 1 part by weight, and the blowing agent was 3 parts by weight.

(2) Manufacturing process:

Firstly, according to the sectional design and ventilation, the open profiled material is processed. The cross section of the metal profile may be a U-shaped, C-shaped or semi-circular shaped shape. In this embodiment, the metal shown in FIG. 5 can be used. Profile 2.

The composite sheet is co-extruded by an extrusion die 3 including a die body 31 and a partitioning plate 33 which is disposed in a cavity formed on the die body 31. A mold plastic feed opening 341 is also formed in the mold body 31 in communication with the cavity.

The open-shaped metal profile 2 is fed into the cavity of the extrusion die 3 through the guide rollers precisely positioned above, below, left and right, as shown by the arrow in FIG. 2, for the metal profile feeding direction, and the metal profile 2 and the partition plate fed into the cavity. The casing 33 is enclosed by a cavity, and a cavity gap 34 for flowing molten wood material is disposed between the casing and the mold body 31 and the core 32.

The raw materials of the above-mentioned wood-plastic frame 1 are mixed and added to a hopper of an 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 gap 34 through the wood plastic feed port 341, and is distributed into the wood plastic frame structure through the cavity gap 34 and thermally bonded to the metal profile 2, The liquid-plastic frame 1 is integrated with the metal profile 2 after being cooled by the compressed air inside the cavity during the flow through the forming template and the outlet template, and after the water cooling of the wood-plastic frame in the subsequent conventional method. When the extrusion die 3 is provided with one or more cores 32, a plurality of internal ribs are formed at the cavity gap for the molten wood-plastic injection flow, thereby forming a plurality of chambers of the wood-plastic frame. While the metal profile 2 and the molten wood plastic material are fed into the extrusion die, the gas sequentially passes through the air passage 35 through the die body 31, the air passage 35 of the branching shuttle, and the partition plate 33, into the metal profile 2 and the partition plate. The cavity enclosed by 33 is internally cooled by the cooling of the metal profile to be discharged.

After the wood-plastic frame 1 and the metal profile 2 are advanced through the exit template, the wood-plastic frame 1 is externally cooled to room temperature through an externally-cooled cooling system of the subsequent cooling shaping mold, and the wood-plastic frame 1 is completely cured to form a wood-plastic frame. 1 Composite sheet composited with metal profile 2, pulled by a uniform speed tractor, cut and packaged into the warehouse according to the needs.

(3) Extrusion die:

Referring to Figures 1 and 2, the extrusion die 3 includes a die body 31 and a partition plate 33 to which a wood-plastic feed port 341 of the die is attached. In an example, the mold body 31 includes a sequential guard template 311, a split template 312, a forming template 313, and an exit template 314. Wherein, the setting of the protective template 311 is only to facilitate the guiding of the metal profile, and to prevent the shunting template 312 from being worn. If the protective template 311 is worn, it is convenient to replace, and the shunting template 312 is provided with a wood plastic feeding port 341, and is squeezed. Connected to the machine, it is inconvenient to replace after wear. The mold body 31 may also not include the protective template 311.

In this embodiment, a partitioning plate 33 and an air passage 35 are disposed in the extrusion die 3, the partitioning plate 33 is disposed in the cavity of the mold body 31, and the metal profile 2 is an open-shaped metal profile; wherein, the extrusion die 3 is further An air passage 35 is provided, and the air passage 35 sequentially passes through the mold body 31, the cavity slit 34, and the partition plate 33 into the cavity surrounded by the metal profile 2 and the partition plate 33.

In one example, the air passage 35 can be introduced into the extrusion die 3 from the forming template 313, and the portion of the air passage 35 passing through the cavity slit 34 is formed by a hollow splitter shuttle 36 (shown in Figure 3) to separate the melt. The wood plastic material is then passed through the partition plate 33 and the opening portion of the metal profile 2 into the cavity defined by the metal profile 2 and the partition plate 33, and the hollow cavity is ventilated, and can be selectively set to be flat through the outlet pipe outlet. Or umbrella-like structure and selective blowing to the inner surface of the metal profile, to make full use of the high thermal conductivity of the metal profile for rapid cooling, to control the cooling rate by adjusting the gas flow rate, and innovatively cooling from the hollow interior of the wood-plastic frame, by improving The cooling efficiency reduces the load of external cooling of the conventional wood-plastic frame, thereby increasing production efficiency.

In order to form the composite sheet into a plurality of second chambers, one or more cores 32 may also be disposed within the mold body 31. When the extrusion die 3 is provided with one or more cores 32, the mold body and the core 32 form a cavity gap in the mold for the molten wood plastic injection flow, when the molten wood plastic flows in the cavity gap A plurality of inner ribs are formed to form a second chamber of the wood-plastic frame and more chambers. In order to fix the partition plate 33 and the core 32 in the cavity. The partition plate 33 and the core 32 may be connected to the mold body 31 through a connecting rib similar to the split shuttle structure, or one end of the partition 33 and the core 32 may be connected to the split template 312 or the forming template 313 to achieve fixing.

The mold shown in Figs. 1 and 2 can produce the composite sheet shown in Fig. 4, as shown in Figs. 1 and 2, and the extrusion mold 3 includes a partitioning plate 33 and two cores 32. The partition plate 33 can enclose a cavity with the metal profile 2 .

The mold comprises a cavity gap between the cores for the molten wood plastic material to flow in, when the opening is When the metal profile 2 passes through the cavity, the open metal profile 2 is surrounded by the partition plate 33, and a cavity is formed inside. A gap between the mold body and the core 32 and the partition plate 33 is provided for the flow of the molten wood plastic material, so that the molten wood plastic material enters the cavity of the cavity and is distributed by flow to form the multi-chamber structure of the wood plastic frame 1. .

The molten wood-plastic foam material enters a gap defined between the two cores 32 and the metal profile 2 or the partition plate to form a first divided inner rib 11 of the composite sheet plane. The first partition inner rib 11 and the right side wood plastic frame 1 enclose a first chamber, and the wall surface of the first chamber is bonded to the surface of the metal profile 2.

The molten wood plastic material enters the cavity gap between the two cores 32, and may form a second dividing inner rib 12, the second separating inner rib 12 is perpendicular to the first dividing inner rib 11, the first separating inner rib 11, The second dividing inner rib 12 and the left side wood plastic frame 1 enclose two second chambers, and the cross-sectional shapes of the two cores 32 respectively correspond to the two second chamber cross-sections.

The forming die plate 313 is provided with a gas inlet 351 into which the gas enters the air passage 35, such that the gas enters the cavity surrounded by the metal profile 2 and the partition plate 33 through the gas inlet 351 and the air passage 35, thereby cooling the metal profile 2.

The split template 312 is provided with a wood plastic feed port 341, and the molten wood plastic foam material extruded from the extruder enters the split template 312 from the wood plastic feed port 341, and is diverted by the split template 312 to enter the cavity slit 34. .

As shown in Figures 2 and 3, in order to reduce the resistance of the air passage 35 to the molten wood plastic material, a section of the air passage 35 of the cavity gap 34 may be constituted by a hollow branching shuttle 36.

As a switchable embodiment, the air passage 35 can also enter through the splitter template 312. The air passage 35 first passes through the splitter plate 312 and then enters the cavity formed by the metal profile 2 and the partition plate 33, thereby the metal profile 2 Internal cooling with the wood-plastic frame 1.

(4) Composite sheet

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

(5) Metal profiles

In this embodiment, the metal profile 2 shown in FIG. 5 is adopted. The metal profile 2 includes a web and two side flaps, and the edges of the two wings are provided with hooks which are bent inward or toward the inner side, so that the metal profile 2 can be formed. Open metal profile 2. 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. 7, and the preparation method and raw materials thereof are substantially the same as those in the first embodiment. The difference is that the extrusion die shown in Figure 6 and different metal profiles are used. The metal profile 2 and the partitioning plate 33 of Fig. 7 are different from the metal profile 2 and the partitioning plate 33 of Fig. 1 in the composite sheet, and the web of the metal profile 2 of Fig. 7 is outside the composite sheet of the composite sheet. The layers (close to the inner wall of the composite sheet surface) are bonded. Fig. 7 is substantially the same in cross-sectional view at the same cutting position as Fig. 1, with only some differences in size.

The mold shown in Fig. 6 can produce the composite sheet shown in Fig. 7. As shown in Fig. 6, the extrusion mold 3 includes a partition plate 33 and three mold cores 32.

The partition plate 33 and the metal profile 2 enclose a cavity, and the partition plate 33, the metal profile 2 and the three cores 32 are disposed with the cavity slit 341 and communicated with the mold body 31. By appropriately designing the width and width of the slit, the molten wood-plastic foam material can be controlled to enter the outer layer of the wood-plastic frame 1 forming the predetermined thickness and the first separating inner rib, the second separating inner rib, etc. parallel to the plane of the composite plate, and the second separation The 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 divide the wood plastic frame into a first chamber and three second chambers, and the wall surface of the first dividing chamber is bonded with the metal profile 2, and the other three The two compartments are vacant, and the cross-sections of the three cores 32 correspond to the three second chamber cross-sections, respectively.

(4) Composite sheet

Since the shape of the cavity is different from that of the embodiment 1, the shape of the composite sheet produced is different. As shown in FIG. 7, 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 the other composite sheet. A groove 14 is mated with the same.

(5) Metal profiles

This embodiment adopts the metal profile 2 shown in FIG. 8, and the metal profile 2 includes a web and two side flaps. The edges of both wings are provided with hooks that are bent inward or toward the inside, so that the metal profile 2 can form an open metal profile 2.

Example 3

The composite sheet material shown in FIG. 9 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 Mold: The extrusion die 3 can selectively set the separator 33 or cancel. In the case where the partitioning plate 33 is provided, in the manufacture of the composite sheet, the molten wood-plastic foamed material enters the cavity and is injected into the cavity gap 34 in the mold, and the composite sheet is formed on the periphery of the metal profile 2 and the partition plate 33. The plastic frame 1, the inner side of the wood-plastic frame on the side where the partition plate 33 is provided is also relatively flat; for the mold without the partition plate 33, the wood-plastic frame 1 of the composite plate can also be manufactured, only on the open side of the metal profile 2. The inner side of the wall thickness of the wood-plastic frame formed when the partition plate is not provided is somewhat flat. After the water-cooling molding of the outer side of the wood-plastic frame 1 by the subsequent conventional method, a composite sheet in which the metal-shaped frame is embedded with the metal profile is obtained.

Metal profile: This embodiment adopts the metal profile 2 of FIG. 9 , which is basically the same as that of the embodiment 2, except that one wing of the metal profile 2 is provided with a second protrusion of similar shape inside the first tenon 13 . The convex direction of the second tenon is toward the outside of the metal profile 2, and the other wing is provided inside the first recess 14 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. 10 is produced, and the preparation method and raw materials thereof are basically the same as those in the embodiment 2. The difference is that only one partition plate 33 and one mold core 32 are disposed in the extrusion mold 3, and the metal profile is as shown in FIG. The metal profile 2 shown, as shown in Fig. 10, produces a composite sheet provided with a first dividing inner rib 11 parallel to the plane of the wood-plastic frame 1, the first dividing inner rib 11 separating the wood-plastic frame 1 into a The first chamber and the second chamber, the inner wall surface of the first partition chamber is bonded with the metal profile 2, and the other second partition chamber is vacant.

Example 5

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 embodiment 2, except that a partitioning plate 33 and two mold cores 32 are disposed in the extrusion mold 3, and the metal profile is as shown in FIG. Metal profile 2 as shown. As shown in FIG. 11, the composite sheet produced is provided with two first dividing inner ribs 11 parallel to the plane of the wood-plastic frame 1, and the first dividing inner rib 11 and the second separating inner rib 12 separating the wood-plastic frame 1 into one The first chamber and the two second chambers are bonded to the wall surface of the first partition chamber by a metal profile 2, and the two second partition chambers are vacant.

Example 6

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 embodiment 2, except that the extrusion mold 3 is provided with a partition plate 33, three large-sized mold cores 32 and a small one. The core 32 of the model and the metal profile 2 shown in Fig. 12 are used for the metal profile. As shown in FIG. 12, 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, the first separating inner rib 11 and the second separating inner rib 12 The wood-plastic frame 1 is divided into a first chamber and four second chambers, the wall of the first partition chamber is bonded with the metal profile 2, and the four second chambers are vacant. The metal profile 2 of Figure 12 is interchangeably with the metal profile 2 of Figure 1 .

Example 7

The composite sheet shown in Fig. 13 was produced, and the preparation method and raw materials thereof were basically the same as those in Example 1, except that:

A partitioning plate 33 is provided in the extrusion die 3.

Metal Profile: This embodiment employs the metal profile 2 shown in Fig. 13 and is basically the same as Embodiment 1, except that one wing of the metal profile 2 is provided with a stepped structure 15 at its intermediate portion.

Composite sheet: There is only one first compartment, and the metal compartment 2 is bonded to the first compartment. The metal profile 2 of FIG. 13 is different from the metal profile 2 of FIG. 1 in the composite sheet, and the web of the metal profile 2 of FIG. 13 is bonded to the outer layer of the composite sheet (close to the inner wall of the composite sheet surface). 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. 14 is produced, and the preparation method and raw materials thereof are basically the same as those in the first embodiment, except that a partitioning plate 33 and a core 32 are disposed in the extrusion die 3, and the metal profile is as shown in FIG. Metal profile 2 shown.

As shown in Fig. 14, 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 separating inner rib 11 separates the wood plastic frame 1 into a first chamber and a first In the two chambers, the wall of the first compartment is bonded to the metal profile 2, and the second chamber is vacant. The metal profile 2 of Fig. 14 is different from the metal profile 2 of Fig. 1 in the composite sheet, and the web of the metal profile 2 of Fig. 14 is bonded to the outer layer of the composite sheet (the inner wall near the surface of the composite sheet).

Example 9

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, except that a partitioning plate 33 and two cores 32 are disposed in the extrusion die 3, and the metal profile is as shown in FIG. Metal profile 2 as shown.

As shown in FIG. 15, the composite sheet produced is provided with a first dividing inner rib 11 and a second separating inner rib 12 parallel to the plane of the wood plastic frame 1, the first separating inner rib 11 and the second separating inner rib 12 The wood-plastic frame 1 is divided into a first chamber and two second chambers, the wall of the first compartment being bonded to the metal profile 2, and the two second chambers being 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 10

The preparation method of Example 10 was the same as that of Example 1, except that the raw material of the wood-plastic frame 1 used was different.

The raw material of the wood-plastic frame 1 was weighed: 45 parts by weight of polyethylene (PE), 5 parts by weight of an inorganic filler, 2 parts by weight of a lubricant, 2 parts by weight of a compatibilizer, 1 part by weight of a processing aid, and 23 parts by weight of wood powder. 3 parts by weight of impact modifier, 9 parts by weight of flame retardant, 1 part by weight of compatibilizer, 4 weight of foaming agent Parts and foam conditioner 5 parts.

Example 11

The production method of Example 11 was the same as that of Example 1, except that the raw material of the wood-plastic frame 1 used was 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 1 part by weight of lubricant. 2 parts by weight of a compatibilizer, 3 parts by weight of a foaming agent, and 5 parts of a foam regulator.

Example 12

Example 12 was the same as the preparation method of Example 1, except that the raw material of the wood-plastic frame 1 used was 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. 1 part by weight of a compatibilizer, 1 part by weight of a processing aid, 3 parts by weight of a foaming agent, and 5 parts by weight of a foaming agent.

Example 13

The material of Example 13 is the same as that of the wood-plastic frame 1 of Example 1, except that the structure of the metal profile 2 and the method of preparing the composite sheet are different.

As shown in Figs. 16 and 17, the metal profile 2 of the present embodiment is formed with pre-formed holes, and thus has the following differences in the manufacturing process and the extrusion die:

(1) During the manufacturing process:

Firstly, the porous plate structure is prefabricated by stamping, drilling, etc. on the surface of the metal plate such as steel plate and aluminum plate, and then processed into an open profile according to the sectional design and ventilation requirements. For example, the cross section of the metal profile 2 may be U-shaped, C-shaped or semi-enclosed shaped shape.

Secondly, the metal profile 2 and the molten wood-plastic material are thermally bonded, cooled, formed and formed with gold. While the profile 2 is composited into the integrated wood-plastic frame 1, the molten wood-plastic material is injected or passed through the preformed holes 21 of the metal profile 2 to form protrusions.

(2) During the extrusion process:

When the hollow cavity is ventilated for rapid cooling, the cooling rate is controlled by adjusting the gas flow rate, so that the molten wood plastic foaming material can flow into or be embedded in the metal pore size, thereby preventing the molten wood plastic material from flowing excessively into the hollow. The space, while increasing the internal cooling to increase the cooling and setting efficiency, thereby improving production efficiency.

Test case

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

Table 1

	实施例1Example 1	实施例10Example 10	实施例11Example 11	实施例12Example 12
木塑框架密度Kg/m³ Wood plastic frame density Kg/m ³	865865	761761	793793	893893
防火等级Fire-proof level	B1B1	B2B2	B2B2	B1B1
传热系数W/(m²K)Heat transfer coefficient W / (m ² K)	0.320.32	0.250.25	0.270.27	0.350.35

It can be seen from the data in Table 1 that the composite board prepared in Embodiments 1 and 10-12 of the present invention can be directly used for the heat insulation wall board of the light house, and the overall thickness can be more than 100 mm, and is added through the formula. 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 wooden 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. Moreover, the invention includes each of the various embodiments described herein Any possible combination of some or all of the embodiments.

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 terms "comprising" and "consisting of" mean "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

In the embodiment of the invention, the open metal profile is selected, and the closed shape is not adopted, which not only ensures the basic strength of the composite plate, but also saves the amount of the steel, and at the same time creates conditions for the compressed air to be cooled by the extrusion die; if the surface of the metal profile is not Prefabricated holes are provided to prevent molten wood-plastic fluid from flowing into the first chamber, and the air passage provided in the extrusion mold can be rapidly cooled by air, and the cooling rate can be controlled by adjusting the air flow rate, thereby improving the cooling setting efficiency and thereby improving Production efficiency; if the surface of the metal profile is provided with prefabricated holes, the cooling rate can be controlled by adjusting the air flow rate, so that the molten wood plastic can flow into or be embedded in the metal hole to prevent the molten wood plastic fluid from flowing excessively into the hollow space. Increased cooling efficiency due to increased internal cooling, thereby increasing production efficiency.

The first chamber of the wood-plastic frame is provided with a metal profile, and the anchoring position is set at the position of the in-line metal profile when the wood-plastic wallboard is attached with a heavy object, thereby fundamentally solving the problem that the wood-plastic wallboard is hung in the air conditioner. The anchor bearing problem of heavy objects such as TV sets, the screws or bolts are fastened to the load-bearing frame of the wood-plastic wallboard in the wood-plastic wallboard, which fundamentally eliminates the strength and safety of wood-plastic as a whole wallboard. Due to the composite of the wood-plastic frame and the metal profile, the overall strength of the wood-plastic material and the metal structure is further improved, and the thermal expansion and contraction stress caused by the difference between the metal material and the wood plastic material is dispersed, and the two materials are reduced. The negative impact of the difference in the expansion of the ambient temperature on the composite strength is more conducive to the overall strength of the composite wall panel after the composite of the metal profile and the wood-plastic composite, further enhancing the mechanical strength of the composite wallboard composited with metal and wood-plastic.

Since the internal metal profile effectively provides mechanical strength, the metal profile is integrated with the wood-plastic frame Therefore, the strength requirement of the wood-plastic part is reduced, and the material of the wood-plastic frame can be foamed, thereby not only saving wood-plastic materials, but also greatly improving the thermal insulation performance of the heat-insulating wall board.

(2) The co-extruded composite sheet made by the embodiment of the invention can easily design the indoor and outdoor thickness of the wallboard 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.

(3) The co-extruded composite sheet produced by the embodiment of the invention fully combines the high strength characteristics of the steel and the thermal insulation of the wood plastic, corrosion resistance, weather resistance, no cracking, no deformation, easy molding, The surface decoration is good, and the surface of the plate can be coated, embossed, transferred, coated, etc. as needed.

(4) When the co-extruded composite sheet produced by the embodiment of the present invention is used as a heat insulating 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 composite sheet is indoor and outdoor. Various decoration treatments such as embossing, painting, transfer, and laminating can be performed 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) In the process of manufacturing, the co-extruded composite sheet of the embodiment of the present 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 metal profile and a wood-plastic co-extrusion, the metal profile being an open-ended metal profile, the extrusion die comprising:

Mold body and partition plate;

Wherein the mold body is formed with a hollow through cavity and a wood plastic feed port, and the partition plate is disposed in the cavity;

The partitioning plate is configured to be enclosed with an opening of the metal profile fed into the cavity, and a hollow cavity is enclosed therein, and a gap between the wall surface of the cavity and the cavity is formed for the molten wood plastic material to flow out. a cavity gap, the cavity gap being in communication with the wood plastic feed port;

An air passage is disposed in the extrusion die, and the air passage sequentially passes through the mold body, the cavity slit, and the partition plate into the enclosed interior.
The extrusion die according to claim 1, further comprising one or more cores disposed in said cavity, said core and other portions of said extrusion die being formed in said mold A cavity gap for the flow of molten wood plastic material.
The extrusion die according to claim 2, wherein the mold body comprises a split template, a forming template and an outlet template which are sequentially connected, the cavity extending through the split template, a forming template and an outlet template, the wood plastic A feed port is provided on the splitter template and is configured to be coupled to the extruder.
The extrusion die according to claim 3, wherein one end of the partitioning plate and the core is connected to the forming template or the split template.
The extrusion die according to claim 3 or 4, wherein the mold body further comprises a protective template attached to a side of the split template away from the molding die, the cavity passing through The protection template.
The extrusion die according to any one of claims 1 to 5, wherein a portion of the air passage passing through the cavity slit is constituted by a hollow branching shuttle.
A method for preparing a composite sheet of a metal profile and a wood-plastic co-extrusion, characterized in that the composite panel is co-extruded by an extrusion die, the extrusion die comprising a die body and a partition plate, the separation The plate is disposed in a cavity formed on the mold body, and the metal profile is an opening Shaped metal profile; the preparation method comprises the following steps:

And feeding an open-shaped metal profile into the cavity, the metal profile is enclosed with the partition plate, and a cavity is formed inside the enclosing body, and the enclosing and the wall surface of the cavity are provided for melting a cavity gap flowing out of the wood plastic material;

While feeding the metal profile, the molten wood plastic material is fed into the cavity gap, and a portion of the molten wood plastic material flowing through the cavity gap is thermally bonded to the surface of the metal profile. Other portions are synchronously flowed out of the outlet end of the extrusion die to form a wood-plastic frame; at the same time, air passing through the enclosed air passage through the air passage formed on the mold body is applied to the wood plastic material and the metal profile Perform internal cooling;

The wood plastic material and the metal profile are simultaneously removed from the outlet end of the extrusion die, and then cooled and molded by an external cooling sizing die to form the composite plate.
The preparation method according to claim 7, wherein the metal profile is formed with a preformed hole, and the preparation method further comprises: the molten wood plastic material is injected or passed through the preformed hole to form a mosaic structure.
The production method according to claim 7 or 8, wherein the extrusion die further comprises one or more cores, and the core and other portions of the extrusion die are formed in the cavity for The cavity gap of the molten wood plastic material flowing, the preparation method further comprises: the wood plastic frame formed by the molten wood plastic material being separated by the cavity gap and formed by cooling and forming and integrated with the metal profile comprises The outer layer and the inner ribs.