CN212979507U - Sandwich board preparation device - Google Patents

Abstract

The utility model relates to a sandwich panel preparation device, belonging to the technical field of sandwich panels, which comprises two groups of heating circuits which are symmetrically arranged in a mirror surface way; one group of heating circuits comprises a heating element and a power supply, wherein the heating element is connected with the two metal clamps; the two metal clamps are respectively connected with the positive electrode and the negative electrode of the same power supply through leads; an insulating block bearing pressure is arranged above the heating element. Through pre-burying heating element between panel and the core of pressing from both sides, when the switch on circuit, because energy conversion is realized to the heat effect of heating element resistance to realize the heating and melting of panel and core of pressing from both sides, realize good bonding under the pressure effect, the ripple battenboard quality of preparing is lighter, and intensity is higher, has lower surface density.

Description

Sandwich board preparation device

Technical Field

The utility model belongs to the sandwich panel field specifically is a laminboard preparation facilities has been related to.

Background

At present, the thermoplastic composite sandwich panel mainly comprises a thermoplastic composite panel and a thermoplastic foam or PP honeycomb core material, and the panel and the core material are connected by multi-purpose adhesive joint.

The inventors have found that such conventional thermoplastic foams and PP honeycomb sandwich panels have long production cycles and poor connection properties between the core and the face sheets.

SUMMERY OF THE UTILITY MODEL

For overcoming current thermoplasticity combined material battenboard preparation production cycle length, and weak shortcoming of connection performance between core and the panel, the utility model aims at providing a battenboard preparation facilities.

In order to achieve the above purpose, the present invention is realized by the following technical solution:

at least one embodiment of the utility model provides a sandwich board preparation device, which comprises two groups of heating circuits which are symmetrically arranged in a mirror surface manner; one group of heating circuits comprises a heating element and a power supply, wherein the heating element is connected with the two metal clamps; the two metal clamps are respectively connected with the positive electrode and the negative electrode of the same power supply through leads; an insulating block bearing pressure is arranged above the heating element.

Further, the metal clip may alternatively be an insulating material, and the insulating material and heating element contact interface may be coated with a conductive material.

Further, the upper and lower surfaces of the heating element are provided with resin films.

Further, the heating element and the resin film may be combined into a layer to be replaced with a carbon fiber prepreg.

Further, the resin film is selected from polypropylene, polyethylene, nylon, polyvinyl chloride, polyethylene terephthalate, polycarbonate film.

Further, the heating element is a resistive heating element.

Further, the heating element is an induction heating element; the induction heating element is a ferromagnetic material or a thermoplastic plastic strip, bar or gasket filled with iron oxide or metal particles; accordingly, the power supply is also replaced with an induction generating device.

Further, the heating elements may be either a continuous layer or may be dispersed only at the locations of the welds between the face sheets and the corrugated core in the corrugated sandwich panel.

Further, the power source may be a direct current power source or an alternating current power source.

Further, the width of the heating element is greater than the width of the face sheets in the corrugated sandwich panel.

Compared with the prior art, the utility model has the advantages and positive effect be:

the utility model discloses a be equipped with electric heating element between two anchor clamps of battenboard preparation facilities, the heating element top is equipped with the insulating base who bears certain pressure, can be pre-buried between panel and ripple clamp core with heating element, heating element is when the switch-on circuit, because energy conversion is realized to the fuel factor of heating element resistance, thereby realize the heating fusion of counterplate and clamp core, realize good bonding under the pressure effect, compare in traditional heating tool counterplate and clamp core and heat through, heating element not only plays the mechanical properties that the effect of heating fusion bonding resin can also improve the sandwich panel.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

FIG. 1 is a schematic view of a device for manufacturing a thermoplastic corrugated sandwich resistance welded sandwich plate according to an embodiment of the present invention;

fig. 2 is a schematic view of a thermoplastic composite corrugated sandwich panel according to an embodiment of the present invention.

In the figure: 1. a power supply, 2, a metal wire, 21, a panel layer, 22, a resin film layer, 23, a heating element layer, 24, a corrugated sandwich layer, 3, an insulating block, 4, a panel, 5, a film, 6, a metal clamp, 7, a heating element, 8 and a corrugated sandwich.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

For convenience of description, the words "upper", "lower", "left" and "right" in the present application, if any, merely indicate correspondence with the upper, lower, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the present invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

The embodiment of the utility model discloses a thermoplasticity combined material ripple type sandwich panel, this sandwich panel mainly include that panel and ripple press from both sides the core and constitute.

The cross section of the corrugated sandwich is corrugated, preferably trapezoidal, and the upper surface and the lower surface of the corrugated sandwich are respectively provided with a panel.

Furthermore, the core material and the face plate in the thermoplastic composite material corrugated sandwich plate are both made of thermoplastic composite materials, wherein the types and the contents of the reinforcing fibers contained in the two face plates and the core material can be the same or different, and the resin matrixes of the two face plates and the core material can be the same or different. The thermoplastic resin is selected from one or more of polypropylene, polyethylene, nylon, polyvinyl chloride, polystyrene, polycarbonate or acrylonitrile-butadiene-styrene copolymer, or is selected from modified polymers of the thermoplastic resin and other components, and the other components are selected from one or more of antioxidant and anti-aging agent. Wherein the thermoplastic resin system selected for the face sheet and core may be the same or different.

Preferably, the reinforcing fibers in the thermoplastic composite core material and the thermoplastic composite panel are selected from one or more of glass fibers, carbon fibers, aramid fibers or ultrahigh molecular weight fibers, wherein the types of the fibers selected for the panel and the core material can be the same or different.

Compared with the traditional foam sandwich plate and the honeycomb sandwich plate, the corrugated sandwich plate in the embodiment has lighter mass, higher strength and lower surface density. Meanwhile, functional elements can be placed in the space in the corrugated core, and the effect of structural function integration is achieved.

The schematic diagram of a device for manufacturing the thermoplastic corrugated sandwich resistance welding sandwich plate, which is also disclosed by the other embodiment of the utility model, is shown in figure 1.

This device mainly includes two heating circuit, divide into heating circuit and lower heating circuit, goes up heating circuit and heating circuit mirror symmetry down, heating circuit includes power 1, resistance heating element 7 and metal fixture 6, and above heating circuit is the example, and a metal fixture 6 is connected respectively at resistance heating element's both ends, and the positive pole of power is connected to the metal fixture on the left side, and the metal fixture on the right side connects the negative pole of power, and resistance heating element's upper end is equipped with insulating block 3, and the insulating block setting in the heating circuit of corresponding downside is in heating element's below.

It should be noted that the metal holder of the apparatus of this embodiment may be made of either conductive or insulating material, but if insulating material is selected, it is necessary to coat the contact interface between the holder and the resistance heating element with conductive material.

The working principle of the preparation device is that current is transmitted to the resistance heating element through the metal clamp, the resistance heating element converts electric energy into heat energy through resistance heat effect to provide heat for the resin film between the corrugated core and the panel, meanwhile, pressure is applied through the insulating block 3, when the temperature reaches the melting point of the resin film, the resin film starts to melt and flows and permeates under the action of the pressure, and the corrugated core and the panel are bonded through cooling. Compared with the traditional method that the panel and the sandwich are heated by a heating tool. In the embodiment, the resistance implant is embedded in advance, the panel and the sandwich core are heated through the heat effect of the resistance implant, and the heating element not only plays a role in heating and melting the bonding resin, but also can improve the mechanical property of the sandwich panel.

It should be noted that the insulating block in this embodiment functions to prevent current leakage. The insulating block can be selected from bakelite, glass fiber reinforced plastic or other insulating materials with certain pressure resistance.

In some embodiments, the resistive implant may be replaced with an inductive heating element, replacing the power source with an induction generating device, and the inductive heating element may be selected from a material having ferromagnetic properties or be a thermoplastic strip, rod or shim filled with iron oxide or metal particles. When the induction device is electrified, an alternating magnetic field is generated, and the induction heating element generates heat in an induction way under the alternating magnetic field, so that the interface resin is melted, and the adhesion is realized.

In other embodiments, the resistance heating element material may be selected from one or more of carbon fiber prepreg, carbon fiber, metal mesh or other conductive and thermoplastic resin permeable material. The heating element not only plays a role in heating and melting the bonding resin, but also can improve the mechanical property of the sandwich plate.

The utility model discloses some other embodiments still disclose the preparation method of preparation ripple sandwich panel based on above-mentioned device, as shown in fig. 1 to preparation glass fiber/polypropylene thermoplastic composite material ripple sandwich panel is the example, and the raw materials are continuous glass fiber reinforced polypropylene panel, continuous glass fiber reinforced polypropylene ripple sandwich, polypropylene film and one-way carbon cloth. The specific preparation process of the corrugated sandwich board is as follows:

the above heating circuit is taken as an example:

1. a continuous glass fiber reinforced polypropylene panel is prepared, cut to a desired size, placed on the lower surface of the insulating block 3,

2. cutting out a resin film 5 with the same size as the panel, and flatly laying the resin film 5 on the panel 4, wherein the resin film 5 in the thermoplastic composite material corrugated sandwich plate is selected from polypropylene, polyethylene, nylon, polyvinyl chloride, polyethylene terephthalate and polycarbonate film. Wherein the thermoplastic resin system and the resin film selected for the face sheet and the core material may be the same or different.

3. And cutting a heating element 7, wherein the heating element is preferably unidirectional carbon fiber cloth, the length of the cut unidirectional carbon fiber cloth is consistent with that of the panel layer 4, the width of the cut unidirectional carbon fiber cloth is 20mm wider than that of the panel layer for being connected with a metal clamp 6, and a layer of resin film 5 is arranged above and below the carbon fiber cloth respectively.

4. Placing an upper corrugated sandwich 8 below the heating element 7, simultaneously placing a metal support in the corrugated sandwich 8, and in the same way, symmetrically arranging a lower heating circuit according to the upper heating circuit, as shown in fig. 2, which is a schematic diagram of a finally manufactured thermoplastic composite material corrugated sandwich panel, wherein the middle part is a corrugated sandwich layer 24, a heating element layer 23 is arranged between the corrugated sandwich layer 23 and the upper and lower panel layers 21, and the upper and lower surfaces of the heating element layer 23 are connected with resin film layers 22;

5. clamping two ends of the unidirectional carbon fiber cloth by a metal clamp

6. Bolting metal wires to metal clamps

7. The power source 1 can be a direct current power source or an alternating current power source, the power source provides energy for the whole circuit, the switch is turned on, and current is conducted to the metal clamp 6 through the metal wire 2.

8. Setting proper output current and power, and applying pressure through a press; the current is transmitted to the heating element through the clamp, and the heating element converts the electric energy into heat energy through the resistance heat effect to provide heat for the thermoplastic resin. When the temperature reaches the melting point of the resin, the resin begins to melt and flows and permeates under the action of pressure, and the bonding is cooled.

9. And (5) after the resin is melted and soaked, closing the power supply, maintaining the pressure and cooling to realize bonding.

Therefore, the utility model discloses an above-mentioned ripple presss from both sides core panel preparation method realizes the bonding of panel and clamp core easily, improves thermoplasticity composite material sandwich board mechanical properties simultaneously.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims (9)

1. A sandwich board preparation device is characterized by comprising two groups of heating circuits which are arranged in a mirror symmetry manner; one group of heating circuits comprises a heating element and a power supply, wherein the heating element is connected with the two metal clamps; the two metal clamps are respectively connected with the positive electrode and the negative electrode of the same power supply through leads; an insulating block bearing pressure is arranged above the heating element.

2. The apparatus of claim 1, wherein the metal fixture is an insulating material and the interface between the insulating material and the heating element is coated with an electrically conductive material.

3. The sandwich panel manufacturing apparatus of claim 1, wherein upper and lower surfaces of the heating element are provided with resin films.

4. The sandwich panel manufacturing apparatus of claim 3, wherein the resin film is one selected from the group consisting of polypropylene, polyethylene, nylon, polyvinyl chloride, polyethylene terephthalate, and polycarbonate film.

5. The sandwich panel forming apparatus of claim 1 wherein said heating element is an electrical resistance heating element.

6. The sandwich panel making apparatus of claim 1 wherein said heating element is an induction heating element; the induction heating element is of ferromagnetic material and accordingly the power supply is replaced by induction generating means.

7. The sandwich panel forming apparatus of claim 1, wherein the heating element is a continuous layer; or, only at the locations of the welds between the face sheets and the corrugated core in the corrugated sandwich panel.

8. The sandwich panel making apparatus of claim 1, wherein said power source is a dc power source or an ac power source.

9. The sandwich panel making apparatus of claim 1, wherein the heating element has a width greater than the width of the face sheet of the corrugated sandwich panel.

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