CN111169049B

CN111169049B - Online coating device for polyurethane pultrusion composite material

Info

Publication number: CN111169049B
Application number: CN202010148903.XA
Authority: CN
Inventors: 时剑; 李顺
Original assignee: Suzhou Hengchuan Photovoltaic Technology Co ltd
Current assignee: Suzhou Hengchuan Photovoltaic Technology Co ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-12-11
Anticipated expiration: 2040-03-05
Also published as: CN111169049A; JP3226651U

Abstract

The invention discloses an online coating device for a polyurethane pultrusion composite material, which comprises a box body for the pultrusion composite material to pass through, and a positioning component for limiting the deviation of the pultrusion composite material passing through the box body, wherein the positioning component is arranged inside and/or outside the box body; the film forming component is positioned at one end of the box body and enables coating liquid on the surface of the pultrusion composite material to form a coating film, the film forming component is arranged at least at the downstream of the positioning part, and the film forming component comprises: the method comprises the following steps of applying a uniform coating film on a pultrusion composite material, sealing coating liquid and forming an elastic part which is elastically deformed under extrusion force, wherein a cavity for the pultrusion composite material to pass through and is matched with the section of the pultrusion composite material is formed in the elastic part; the clamping mechanism is connected with the elastic component, and a first abdicating space for the pultrusion composite material to pass through is arranged on the clamping mechanism. The invention has the advantage of ensuring the sealing performance.

Description

Online coating device for polyurethane pultrusion composite material

Technical Field

The invention relates to an online coating device for a polyurethane pultrusion composite material, which is used for coating the pultrusion composite material with a preset shape online.

Background

The polyurethane pultrusion composite material has the problem of insufficient weather resistance, and particularly in long-term outdoor exposure, the resin layer on the surface is easy to be pulverized, discolored and even exposed to fibers, so the polyurethane pultrusion composite material is generally required to be coated.

US5492583A discloses an in-line coating method and apparatus for pultruded composite materials by adding a coating die after the pultrusion die for in-line coating of pultruded profiles, the coating die having means for applying a uniform coating to the pultruded part, a positioning member comprising a coating chamber for the first application of the coating and a coating die for holding the coating under pressure, the taper having a reduced cross-sectional area in a direction away from the coating chamber, the coating pressure along the outer surface of the pultruded part increasing substantially due to the taper, thereby substantially centering the part. With the coating die of the above structure, there are the following problems:

1. the pultrusion die stretches into the coating die, firstly, the extruded section bar is in clearance fit with the pultrusion die, and the elastic deformation of the section bar and the pultrusion die is small, so that even if the pultrusion die or the section bar has elastic deformation, the gap between the pultrusion die and the section bar cannot be compensated, and therefore, the coating liquid can flow to the section bar along the gap between the pultrusion die and the section bar. Secondly, when the coating die fails, it is necessary to disassemble the coating die, and the entire production line is stopped.

2. The positioning part is installed inside the coating die, and the structure has the following problems: first, if the positioning member is made of flexible material, when the profile passes through the positioning member, the profile will press on the positioning member under the action of its own gravity, leading to the deformation of the positioning member, thereby causing a gap between the profile and the upper portion of the positioning member, and failing to form a seal against the coating liquid. Secondly, if the positioning part is made of a material with higher hardness, due to the tolerance of the pultruded profile, when the size of the profile is larger than the size of the minimum section of the positioning part, the profile and the positioning part are in interference fit and cannot pass through the positioning part; or when the size of the profile is smaller than the size of the minimum section of the positioning part, the gap is formed between the profile and the positioning part, and the coating liquid cannot be sealed.

And 3, the coating die with the structure is inconvenient to assemble, clean and maintain.

Disclosure of Invention

The invention provides an online coating device for a polyurethane pultrusion composite material, which can ensure the sealing property.

An on-line coating apparatus for a polyurethane pultrusion composite material, comprising:

a box body for the pultrusion composite material to pass through;

the positioning component is used for limiting the deviation of the pultrusion composite material penetrating through the box body and is arranged inside and/or outside the box body;

the film forming component is positioned at one end of the box body and enables coating liquid on the surface of the pultrusion composite material to form a coating film, the film forming component is arranged at least at the downstream of the positioning part, and the film forming component comprises:

the method comprises the following steps of applying a uniform coating film on a pultrusion composite material, sealing coating liquid and forming an elastic part which is elastically deformed under extrusion force, wherein a cavity for the pultrusion composite material to pass through and is matched with the section of the pultrusion composite material is formed in the elastic part;

the clamping mechanism for clamping the elastic component is provided with a first abdicating space for the pultrusion composite material to pass through.

The invention has the advantages that: since the positioning component has a positioning effect on the pultrusion composite material, the gravity of the pultrusion composite material does not act on the elastic component, and for the elastic component, only the extrusion force from the pultrusion composite material is received, since the elastic component is deformed, and the deformation is changed according to the change of each part of the pultrusion composite material (for example, the tolerance of one end of the pultrusion composite material is different from that of the other end), therefore, the elastic component can adapt to the change of the pultrusion composite material, thereby not only ensuring the sealing performance between the elastic component and the pultrusion composite material, but also ensuring the uniformity of the obtained coating film.

Drawings

FIG. 1 is an assembly view of an in-line coating apparatus of the present invention;

FIG. 2 is a cross-sectional view of an in-line coating apparatus of the present invention;

FIG. 3 is a schematic view of a first cassette;

FIG. 4 is a schematic view of a positioning member;

FIG. 5 is a schematic view of an elastic member;

FIG. 6 is a schematic view of a first splint;

FIG. 7 is a schematic view of a second cassette;

FIG. 8 is a schematic view of a polyurethane pultrusion composite pultrusion line;

fig. 9 is an assembly view of the switching mechanism and the inline coating apparatus.

Detailed Description

Example 1

Referring to fig. 1 and 2, the apparatus 1 for coating a polyurethane pultrusion composite material in-line according to the present invention includes a box 10 through which a pultrusion composite material a passes, a positioning member 20 for limiting the deviation of the pultrusion composite material passing through the box, and a film forming assembly located at one end of the box and forming a coating film from a coating liquid on the surface of the pultrusion composite material a. The positioning member 20 is located outside the cartridge 10, the positioning member 20 is disposed at the outlet of the cartridge 10, and a film-forming unit is provided downstream of the positioning member 20, i.e., downstream of the outlet of the cartridge 10, whereby the coating liquid chamber 10a is formed by the cartridge 10, the positioning member 20, and the film-forming unit. In order to further improve the positioning of the pultruded composite material a, a positioning member 20 is also disposed at the inlet portion of the case 10.

As shown in fig. 3, the case 10 is provided with an inlet 10b for the coating liquid, and the coating liquid disposed in the coating liquid container is injected into the coating liquid chamber 10a through the inlet 10 b. The case 10 is also provided with a discharge port 10c from which the coating liquid is returned to the coating liquid container, and therefore, the coating liquid circulates between the coating liquid container and the circulation case 10, which can prevent the coating liquid from condensing inside the case 10. Alternatively, a stirrer (see fig. 2) may be disposed at the bottom of the box 10, and a motor may be disposed outside the box to drive the stirrer, so as to prevent the coating solution from condensing in the box 10.

Referring to fig. 2 and 4, the positioning member 20 is a member for preventing the pultrusion composite material a passing through the in-line coating apparatus from deflecting while moving, and the positioning member 20 preferably has a structure in which: the device comprises a closed or non-closed first frame-shaped component 21 and a supporting component 22, wherein one end of the supporting component 22 is connected to the first frame-shaped component 21, and the other end of the supporting component 22 is a free end for supporting the pultrusion composite material A.

As shown in fig. 2 and 4, the support member 22 is a protrusion protruding from the first frame-shaped member 21, the support member 22 is located in the inner hole of the first frame-shaped member 21, and one end of the support member 22 is connected to the inner hole wall of the first frame-shaped member 21. The support members 22 not only support the pultruded composite a, but also limit the deviation of the pultruded composite a along the traction direction due to the plurality of support members 22, thereby providing a guiding function for the pultruded composite a.

As shown in fig. 2 and 4, the positioning component 20 and the film forming assembly are exposed outside the box 10, which facilitates heat dissipation of the positioning component 20 and the film forming assembly, and facilitates installation, cleaning or replacement.

As shown in fig. 2 and 4, the number of the supporting members 22 is plural, whereby a space 23 is formed between two adjacent supporting members 22, and the space 23 allows the coating liquid to freely flow between the box body 10 and the film-forming assembly, so that the surface of the pultruded composite material a can still be impregnated with the coating liquid after passing through the supporting members 22.

As shown in fig. 2 and 5, the film forming assembly includes an elastic component 30 and a clamping mechanism 40 for clamping the elastic component, the elastic component 30 applies a uniform coating film to the pultrusion composite material a, forms a seal to the coating liquid and is elastically deformed when being subjected to extrusion force, and a cavity 30a for the pultrusion composite material to pass through and is matched with the section of the pultrusion composite material a is arranged on the elastic component 30.

As shown in fig. 2 and 8, after the pultruded composite material a drawn out from the pultrusion die C is cooled (to a surface temperature of 30 to 90 ℃) by a cooling mechanism (not shown), the coating liquid is adhered to the surface of the pultruded composite material a, the pultruded composite material a does not deflect when moving in the axial direction by the action of the positioning component 20, when the pultruded composite material a passes through the cavity 30a, the pultruded composite material a generates an extrusion force on the elastic component 30, the elastic component 30 is elastically deformed by the extrusion force, so that a sealing structure is formed between the pultruded composite material a and the elastic component 30, and the elastic component 30 scrapes the redundant coating liquid adhered to the surface of the pultruded composite material a, so that a uniform coating film is formed on the surface of the pultruded composite material a.

The material of the elastic component 30 is one of silica gel, rubber, soft PVC, and thermoplastic elastomer TPE/TPR, preferably silica gel, and the elastic component 30 made of silica gel can obtain coating films with different thicknesses by selecting the silica gel with different hardness, for example, the thickness of the coating film is controlled to a desired value of 35 to 45 μm. In addition, the thickness of the elastic member 30 is 0.5 to 5 mm.

As shown in fig. 2 and 5, the elastic component 30 includes an edge 31 and a deformation portion 32 that is elastically deformed by the pressure of the tension extrusion molding composite material a, the cavity 30a is disposed on the deformation portion 32, a second yielding space B for the deformation of the deformation portion 32 is provided between the deformation portion 32 and the positioning component 20, and the elastic component 30 is prevented from being blocked by the positioning component 20 when being elastically deformed by the second yielding space B.

Referring to fig. 2 and 6, the clamping mechanism 40 is provided with a first relief space for the pultrusion composite material to pass through. The clamping mechanism 40 includes a first clamping plate 41 and a second clamping plate 42. The first clamping plate 41 is located on one side of the elastic component 30 and fixed with the elastic component 30, the second clamping plate 42 is located on the other side of the elastic component 30 and fixed with the elastic component 30, the elastic component 30 is preferably fixed with the first clamping plate 41 and the second clamping plate 42 by adopting an adhesive, and the adhesive is preferably a silica gel adhesive. The first splint 41 is provided with a first abdicating hole 41a, the second splint 42 is provided with a second abdicating hole, and the first abdicating hole 41a and the second abdicating hole form the first abdicating space.

As shown in fig. 2 and 6, the first relief space corresponds to the deformation portion 32. The pultrusion composite material a may give an axial force to the elastic member 30 by extrusion when passing through the elastic member 30, and therefore, the elastic member 30 may be deformed by the force in the axial direction, and thus, the first clamping plate 41 and the second clamping plate 42 provide a first space for the elastic member 30 to be displaced when being deformed in the axial direction. Without the first relief space, the elastic member 30 cannot be deformed by the axial force, which results in failure to form a seal and failure to uniformly form a coating film.

As shown in fig. 2 and 6, each of the first clamping plate 41 and the second clamping plate 42 includes a second frame-shaped member 43 for clamping the edge 31 of the elastic member 30 and closing the same, at least one clamping portion 44 for limiting a gap between the elastic member 30 and the pultrusion composite material a when the elastic member is elastically deformed, one end of the clamping portion 44 is connected to the second frame-shaped member 41, and the other end of the clamping portion 44 is a free end. The edge 31 of the elastic member 30 is sandwiched by the edges of the first clamping plate 41 and the second clamping plate 42.

Although the elastic member 30 is allowed to deform when the pultruded composite material a passes through the elastic member 30, the amount of deformation cannot be so large that a gap occurs between the pultruded composite material a and the elastic member 30, and thus the amount of deformation of the deformer 32 can be limited by the clamping action of the clamping portions 44 of the first clamping plate 41 and the second clamping plate 42 on the deformer 32. The number of gripping portions 44 is determined according to the shape of the pultruded composite a.

After the elastic member 30 is adhered and fixed to the holding mechanism, the holding mechanism is connected to the positioning member 20 and the case 10 by bolts. The outer peripheral surfaces of the case 10, the positioning member 20, and the second frame-like member 43 are provided with mounting holes through which bolts are inserted.

The in-line coating apparatus further includes a sealing assembly 50 through which the pultrusion composite passes, the sealing assembly 50 being disposed at the other end of the case body 10, i.e., at the entrance of the case body 10. The structure of the seal assembly 50 is preferably the same as that of the film formation assembly, and will not be described in detail. The function of this seal assembly 50 differs from the prior art: since the positioning member 20 forms a support for the pultrusion composite material a, the gravity of the pultrusion composite material a does not act on the sealing assembly 50, so that the sealability can be ensured.

Example 2

As shown in fig. 7, the positioning member 20 is provided inside the case 10, the positioning member 20 is integrally formed with the case 10, and the positioning member 20 is preferably a plurality of projections. Since the positioning member 20 is located inside the case 10, the film formation module is still disposed outside the case 10, and the film formation module is connected to the case 10.

Example 3

The positioning member 20 is a combination of embodiment 1 and embodiment 2, that is, a part of the positioning member 20 is provided outside the case 10 as in embodiment 1, and the other part of the positioning member 20 is provided inside the case 10 as in embodiment 2.

The second frame-like member 43 may be in an unsealed state, for example, a notch may be formed in the second frame-like member 43 of embodiment 1.

In addition, generally, the pultrusion die C is used for pultrusion of polyurethane composite material, and the pultruded composite material a after being formed is cooled by a cooling mechanism located at the downstream of the pultrusion die C, as shown in fig. 8, on the basis of the above-mentioned embodiments, when the on-line coating apparatus 1 is applied to a production line for pultrusion of polyurethane composite material, each on-line coating die 1 is connected with a switching mechanism 3 to form an on-line coating unit 2, wherein each switching mechanism 3 is connected with the frame 60, and each on-line coating unit 2 in this embodiment comprises two on-line coating dies 1 and two switching mechanisms 3, wherein one on-line coating die 1 is switched to a working station, and the other on-line coating die 1 is switched to a standby or maintenance station. Of course, it is also possible to switch two in-line coating apparatuses 1 to the work station simultaneously.

A plurality of different online coating units 2 can be arranged on a polyurethane composite material pultrusion production line, when pultrusion composite materials A with different pultrusion section shapes are formed, the online coating units 2 which need to work can be switched to working stations through a switching mechanism 3, and other online coating units 2 which do not need to work are switched to standby or overhaul stations. Each of the on-line coating units 2 is applicable to the pultruded composite materials a having different sectional shapes, so that the pultruded composite materials a having different sectional shapes can be coated on the same pultrusion line.

The switching mechanism 3 may adopt linear actuators such as an air cylinder and a hydraulic cylinder, but these actuators need to be connected with corresponding air sources or liquid sources to supply, and work together with components such as a controller and an electromagnetic valve, so that the cost is high, and therefore, the switching mechanism 3 in the present invention preferably adopts the following structure:

as shown in fig. 9, the switching mechanism includes a mounting bracket 61, a guide seat 62, a connecting bracket 63, a lifting rod 64, a limiting seat 65, a switching control mechanism 66, a spring 67, and a cam 68, the mounting bracket 61 is fixed to the frame 60, the guide seat 62 is disposed at one end of the mounting bracket 61, a connecting assembly is disposed at the other end of the mounting bracket 61, and a channel for the lifting rod 64 to pass through is disposed on the guide seat 62.

One end of the lifting rod 64 penetrates through a channel on the guide seat 62 to be fixed with the connecting frame 63, the connecting frame 63 is U-shaped, after two or three screw holes on the online coating die 1 are assembled by bolts, a hole is left without installing the bolt, the assembled online coating die 1 is placed into the connecting frame 63, the online coating die 1 is connected with the connecting frame 63 by penetrating the connecting frame 63 and the online coating die 1 through the bolts, wherein in order to avoid the rotation of the online coating die 1 around the bolts, the cross section of the middle part of the bolts is arranged to be a polygonal structure, and the shape of the holes on the online coating die 1 is matched with the shape of the bolts.

The other end of lifter 64 passes coupling assembling, and coupling assembling includes connecting seat 61a, external thread bush 61b, nut 61c, and external thread bush 61b passes connecting seat 61a, and nut 61c and external thread bush 61b threaded connection, nut 61c are fixed with connecting seat 61a, the other end and the external thread bush 61b clearance fit of lifter 64. The limiting seat 65 is fixedly connected with the lifting rod 64, and one end of the limiting seat 65 is provided with a rod-shaped part 65 a. One end of the spring 67 is abutted to the limiting seat 65, the other end of the spring 67 is abutted to the connecting assembly, preferably, the other end of the spring 67 is abutted to the external thread sleeve 61b, and the pretightening force of the spring 67 can be adjusted through the external thread sleeve 61 b.

The switching operation mechanism 66 is pivotally connected to the mounting bracket 61, the cam 68 is fixed to the switching operation mechanism 66, and the cam 68 is engaged with the rod member 65a to hold the spring 67 and the stopper 65 in abutment with the connecting member. The switching operation mechanism 66 is composed of an operation handle and a rotating shaft, the handle is fixed with the rotating shaft, the rotating shaft is pivotally connected with the mounting frame 61 through a bearing, and the cam 68 is fixed with the rotating shaft.

The switching mechanism further comprises a guide part 69 and a guide rod 70, one end of the guide part 69 is connected with the guide seat 62, a guide hole or a guide groove is formed in the guide part 69, one end of the guide rod 70 is fixed with the limiting seat 65, and the other end of the guide rod 70 is in clearance fit with the guide hole or the guide groove.

The online coating die comprises a lifting rod 64, a connecting frame 63 and two fine adjustment nuts 71, wherein the lifting rod 64 is connected with the fine adjustment nuts 71 in a threaded mode, the connecting frame 71 is clamped between the two fine adjustment nuts 71, and the height of the online coating die 1 can be finely adjusted through the fine adjustment nuts 71.

As shown in fig. 8 and 9, when the online coating die 1 needs to be switched between the working state and the standby or maintenance state, the switching operation mechanism 66 is rotated to rotate the cam 68 along with the switching operation mechanism 66, the cam 68 transmits power to the rod-shaped member 65a, the rod-shaped member 65a transmits the power to the limiting seat 65, the limiting seat 65 overcomes the elastic force of the spring 67 to move the lifting rod 64 upward or downward, and the lifting rod 64 drives the connecting frame 63 and the online coating die 1 to move upward or downward, so that the purpose of driving the position switching of the online coating die 1 is achieved.

Claims

1. Polyurethane pultrusion combined material's online coating device which characterized in that includes:

a box body for the pultrusion composite material to pass through;

the clamping mechanism clamps the elastic component, and a first abdicating space for the pultrusion composite material to pass through is arranged on the clamping mechanism;

the elastic component comprises an edge and a deformation part which is elastically deformed by the extrusion force of the tension extrusion molding composite material, the cavity is arranged on the deformation part, and a second abdicating space for the deformation part to deform is formed between the deformation part and the positioning component; the deformation part corresponds to the first yielding space;

the sealing assembly is used for allowing the pultrusion composite material to penetrate through and is arranged at the other end of the box body.

2. The in-line coating apparatus of claim 1, wherein the elastic member is made of one of silicone, rubber, soft PVC, and thermoplastic elastomer TPE/TPR.

3. The in-line coating apparatus as set forth in claim 1, wherein the holding means is bolted to the positioning means and the cartridge body after the elastic member is adhesively fixed to the holding means.

4. The in-line coating apparatus of claim 1, wherein the positioning member comprises:

a first frame-like member, closed or not;

and one end of the supporting component is connected to the first frame-shaped component, and the other end of the supporting component is a free end for guiding the pultrusion composite material.

5. The in-line coating apparatus of claim 1, wherein the clamping mechanism comprises:

the first clamping plate is positioned on one side of the elastic component and fixed with the elastic component, and a first abdicating hole is formed in the first clamping plate;

and the second clamping plate is positioned on the other side of the elastic component and fixed with the elastic component, a second yielding hole is formed in the second clamping plate, and the first yielding hole and the second yielding hole form the first yielding space.

6. The in-line coating apparatus as set forth in claim 5, wherein the first nip plate and the second nip plate each comprise:

a second frame-shaped member which is used for clamping the edge of the elastic member and is closed or not closed;

and the clamping part is used for limiting a gap between the elastic component and the pultrusion composite material when the elastic component is subjected to elastic deformation, one end of the clamping part is connected with the second frame-shaped component, and the other end of the clamping part is a free end.

7. The in-line coating apparatus of claim 1, wherein the film-forming assembly is exposed outside the cartridge body.