CN218758516U

CN218758516U - Decorative moulding

Info

Publication number: CN218758516U
Application number: CN202222954796.7U
Authority: CN
Inventors: 肖志远; 李彦辉; 徐红凯; 杨飞
Original assignee: Jiangsu Yuekong Home Technology Co ltd
Current assignee: Changzhou Huaju New Materials Co ltd
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-03-28
Anticipated expiration: 2032-11-07

Abstract

The utility model relates to a decorative moulding, which comprises a base and a decorative cover plate, wherein the base is provided with a first clamping part; the decorative cover plate is provided with a second clamping piece, the second clamping piece is clamped with the first clamping piece to fix the base and the decorative cover plate, the middle of the second clamping piece is in an open shape, a space is provided for the decorative cover plate to incline relative to the base, and cracking can be effectively prevented.

Description

Decorative moulding

Technical Field

The utility model relates to a building material technical field specifically is a moulding.

Background

The decorative lines are mainly applied to furniture, cabinets, doors and windows, picture frames, photo frames and decoration, the decorative lines are generally made of solid wood, multilayer boards or density boards, high-grade veneers or technical veneers are pasted outside the decorative lines, the veneers are generally poor in toughness, and a decorative cover plate is easy to crack when inclined relative to a base.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a molding that is effective in preventing cracking.

In order to achieve the above object, the utility model provides a technical scheme:

a molding, the molding structure comprising:

the base is provided with a first clamping piece;

the decorative cover plate is provided with a second clamping piece, and the second clamping piece and the first clamping piece are clamped to fix the base and the decorative cover plate.

Preferably, first card is held and is equipped with the sawtooth, first card is held and is included first sawtooth card strip and second sawtooth card strip, first sawtooth card strip with second sawtooth card strip sets up relatively, first sawtooth card strip with be equipped with the sawtooth on the face that second sawtooth card strip is relative respectively, first sawtooth card strip with second sawtooth card strip pass through the sawtooth with the second card is held a meshing, through changing the second card hold with the meshing number of first sawtooth card strip the second card hold with the meshing number of second sawtooth card strip, in order to realize dress trim cover for the slope of base.

Preferably, the base is provided with a screw hole.

Preferably, the number of the first clamping piece engaged with the first sawtooth clamping strip is greater than that of the first clamping piece engaged with the second sawtooth clamping strip.

Preferably, the moulding further comprises a filler strip, and the filler strip is connected with the bottom of the base.

Preferably, the number of the furring strips is 2.

Preferably, the moulding still includes the support bar, the support bar with the base is connected.

Preferably, the support strip is in an inverted V shape.

Preferably, the middle of the second retainer is open.

Preferably, the decorative cover plate is of an arc-shaped structure, and the second clamping piece is arranged on the inner arc surface of the cover plate.

The utility model has the advantages that:

the utility model discloses a decorative moulding comprises a base and a decorative cover plate, wherein the base is provided with a first clamping part; the decorative cover plate is provided with a second clamping piece, the second clamping piece is clamped with the first clamping piece to fix the base and the decorative cover plate, the middle of the second clamping piece is in an open shape, a space is provided for the decorative cover plate to incline relative to the base, and cracking can be effectively prevented.

Drawings

FIG. 1 is a schematic cross-sectional view of a lengthwise decorative molding in one embodiment;

FIG. 2 is a schematic cross-sectional view illustrating a lengthwise decorative molding according to an embodiment;

FIG. 3 is a schematic cross-sectional view illustrating a lengthwise decorative molding according to an embodiment.

100. A base; 110. a first retaining member; 111. a first sawtooth clamping strip; 112. a second saw tooth clamping strip; 200. a decorative cover plate; 210. a second retaining member; 300. a cushion strip; 400. a support strip.

Detailed Description

For better illustrating the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following embodiments.

In the examples, the test methods used were all conventional methods unless otherwise specified, and the materials, reagents and the like used were commercially available unless otherwise specified.

In one embodiment, as shown in fig. 1, the structure of the molding includes a base 100, a trim cover 200 and a supporting bar 400, wherein the base 100 is provided with a first retaining member 110, and the first retaining member 110 is arranged at the top of the base 100; the decorative cover 200 is provided with a second retaining member 210, and the second retaining member 210 is retained with the first retaining member 110 to fix the base 100 and the decorative cover 200. The first clamping member 110 is provided with sawteeth thereon, the first clamping member 110 includes a first sawtooth clamping strip 111 and a second sawtooth clamping strip 112, the first sawtooth clamping strip 111 and the second sawtooth clamping strip 112 are oppositely disposed, the opposite surfaces of the first sawtooth clamping strip 111 and the second sawtooth clamping strip 112 are respectively provided with sawteeth thereon, the first sawtooth clamping strip 111 and the second sawtooth clamping strip 112 are engaged with the first clamping member 110 through the sawteeth, and the inclination of the decorative cover plate 200 relative to the base 100 is realized by changing the engaging number of the second clamping member 210 and the first sawtooth clamping strip 111 and the engaging number of the second clamping member 210 and the second sawtooth clamping strip 112. Specifically, when the number of the second retaining member 210 engaged with the first saw-tooth bar 111 is greater than the number of the second retaining member 210 engaged with the second saw-tooth bar 112, the decorative cover 200 is inclined toward the end of the first saw-tooth bar 111 with respect to the base 100, and conversely, when the number of the second retaining member 210 engaged with the first saw-tooth bar 111 is less than the number of the second retaining member 210 engaged with the second saw-tooth bar 112, the decorative cover 200 is inclined toward the end of the second saw-tooth bar 112 with respect to the base 100. The base 100 is provided with a screw hole. Screws may be installed to secure the base 100 to the article to be decorated, thereby reducing the use of glue. The middle of the second retaining member 210 is open, and the second retaining member 210 is accommodated in the first retaining member 110 to provide a space for the trim cover 200 to tilt relative to the base 100. A support bar 400 is coupled to a side of the base 100, and the support bar 400 is used to support a cosmetic cover plate. Specifically, support bar 400 is the shape of falling V, is convenient for support dress trim cover 200, and the both ends and the base of the type of falling V of support bar 400 are at the coplanar, and the junction of support bar 400 and base 100 can cut according to the use scene to make moulding be applicable to more use scenes. The thickness of the connection point of the supporting strip 400 and the side of the base 100 is less than the thickness of the supporting strip 400 and the base 100, so that the supporting strip 400 can be easily cut to be separated from the base 100.

In one embodiment, the base 100 is secured to the article to be decorated by glue.

In one embodiment, as shown in FIG. 2, the molding further includes a backing strip 300, and the backing strip 300 is connected to the base 100 and the bottom of the support strip 400. The first catch 110 is received in the second catch 210.

In an embodiment, as shown in fig. 3, the number of the pad strips is 2, the pad strip 300 is in a zigzag shape, and a plurality of pad strips 300 can be mutually overlapped to change the height of the base 100 by changing the number of the pad strips 300, so that the decorative line is suitable for more use scenes.

The decorative line comprises the following raw materials in parts by weight:

the modified CPVC resin particles comprise the following raw materials in parts by weight:

specifically, the type of the PVC powder is SG-5, and the grade of the PVC powder is first grade B or second grade.

The filling material comprises heavy calcium carbonate and light calcium carbonate, wherein the mass ratio of the heavy calcium carbonate to the light calcium carbonate is 6: (3-5).

The foaming agent comprises at least one of baking soda, azoisobutyronitrile, carbon dioxide and azodicarbonamide.

The toner comprises at least one of iron yellow, brilliant yellow, oily black and brilliant red.

The regulator comprises at least one of an internal lubricant G60, a calcium zinc stabilizer and EBS, wherein the internal lubricant G60 is a white solid bead which is free from odor and self-flowing and contains dicarboxylic ester of aliphatic alcohol, and the internal lubricant G60 can promote uniform plasticization of melt, improve impact strength and welding strength and improve melt flow property.

The stabilizer comprises at least one of calcium-zinc composite stabilizer, tribasic lead sulfate and tribasic lead sulfate.

More specifically, the toughness of the CPVC modified by CPE, MBS and PVC resins is enhanced, MBS is added into the CPVC, dispersed particles in a blending system are gradually coalesced to form a sea-island structure along with the addition of the MBS resin, when the blending system is impacted by external force, a rubber core in the MBS resin is a stress concentration point, so that the sea-island structure is deformed, silver veins and shear zones are induced around, impact energy is dispersed and absorbed through the silver veins and the shear zones, and the transition from brittle fracture to ductile fracture of the material is formed, thereby achieving the purpose of toughening. The PVC is mainly suitable for improving the performance of the CPVC, and the MBS in the modified material has good thermodynamic compatibility because the solubility parameter of the MBS is similar to that of the PVC, and the PVC has high impact strength at room temperature or low temperature. The advantage of modifying the CPVC prior to blending is that the materials are more versatile, easier to control because of the fewer materials and easier to directionally mix.

In addition, when the modified CPVC resin particles are directly blended with PVC powder, as CPE is linear molecules and is dispersed in a PVC matrix in a network form, the network is easy to deform under the action of a stretching force, so that the blend is subjected to shear slip in a direction forming 30-45 degrees with the stretching direction to form a shear band, a large amount of deformation energy is absorbed, and the toughness of a blending system of the modified CPVC resin particles and the PVC powder is improved.

The rigid organic particles (polystyrene and polymethyl methacrylate) are added into the hard polyvinyl chloride system, and the rigid particles have better compatibility with the hard polyvinyl chloride system, so that the condition of toughening of a rigid body is met, and the rigid organic particles are subjected to cold-drawing deformation under the action of external force, so that the deformation energy is absorbed, the toughness of the hard polyvinyl chloride system is improved, the impact strength is obviously improved, the tensile strength and the like are also improved, in addition, the viscosity of the system can be reduced, and the appearance of the product is improved.

The utility model discloses add the modified CPVC resin particle after toughening in the moulding, improved the toughness of moulding, add polystyrene granule and polymethyl methacrylate simultaneously and improve the intensity of moulding.

In one embodiment, the chlorine content of the modified CPVC resin particles is from 65 to 70%.

In particular, the presence of chlorine atoms has the following effect on the performance of the molding:

1. the regularity of the main chain structure is damaged, the crystallization performance is influenced, and the PVC crystallization is difficult.

2. Due to the introduction of polar atoms Cl, PVC becomes a polar material, the melting point is increased, and the processing temperature is also increased correspondingly.

3. Due to the existence of chlorine atoms, HCl can be removed during heating, so that the temperature sensitivity is high, and the crystallinity is reduced, the strength and the hardness of the polymer can be increased due to crystallization, but molecular chains and chain segments are regularly arranged in crystal lattices after crystallization, the movement is difficult, the toughness is reduced, and the brittle fracture is easy to occur.

The utility model also provides a preparation method of lines as above, including the step:

stirring and mixing PVC powder, modified CPVC resin particles, polystyrene particles, polymethyl methacrylate, a filling material, a toner, a foaming agent and a regulator to obtain a mixture;

adding the mixture into a first extruder for melting, adding the melted mixture into a second extruder, cooling by a heat exchanger in the second extruder, extruding the cooled mixture into a die for extrusion molding; specifically, the temperature of the first extruder is 100-200 ℃, the screw rotating speed of the first extruder is 20-35 r/min, and the temperature of the heat exchanger is 100-125 ℃.

And cooling and cutting the mixture subjected to extrusion molding to obtain the decorative line. Specifically, after the decorative line is cut, polyurethane glue can be coated, the outer layer is coated with the surface skin, the design and color and the material are made according to the requirement, and finally the decorative line is obtained.

In one embodiment, the step of preparing the modified CPVC resin particles comprises:

adding CPVC, CPE, MBS resin, PVC powder, a stabilizer and a lubricant into a stirrer, stirring at a low speed (the low speed range is 50-70 rpm), then switching to a high speed (the high speed range is 130-200 rpm), and blanking when the temperature of the mixture reaches 80-100 ℃; specifically, the materials are uniformly mixed at a low speed, and then are preheated at a high speed, so that the materials are directly and quickly mixed to cause local overheating bonding.

And (3) after the mixture is fed, extruding, cooling and granulating to obtain the modified CPVC resin particles.

In one embodiment, the extrusion temperature of the mixture is 180-200 ℃.

Example 1

Preparation of modified CPVC resin particles

Adding 100 parts by weight of CPVC with chlorine content of 67%, 4 parts by weight of CPE with chlorine content of 35%, 10 parts by weight of MBS resin, 10 parts by weight of SG-5 type PVC powder, 5 parts by weight of calcium-zinc stabilizer and 0.4 part by weight of PE wax into a stirrer, stirring at low speed (50-70 rpm), then turning to high speed (130-200 rpm), and blanking when the temperature of the mixture reaches 90 ℃;

The extrusion temperature of the mixture is 180-200 ℃.

Preparation of decorative moulding

According to parts by weight, 75 parts of PVC powder, 14 parts of modified CPVC resin particles, 4 parts of polystyrene particles, 3 parts of polymethyl methacrylate, 75 parts of heavy calcium, 50 parts of light calcium, 0.15 part of iron yellow, 0.6 part of azodicarbonamide, 0.8 part of baking soda and 7 parts of lubricant G60 are stirred and mixed to obtain a mixture;

adding the mixture into a first extruder (plastic extruder) for melting, setting the temperature to be 180-200 ℃, setting the rotating speed of a screw to be 20-35 r/min, adding the melted mixture into a second extruder, cooling by a heat exchanger in the second extruder, setting the temperature of the heat exchanger to be 100-125 ℃, and extruding the cooled mixture into a die for extrusion molding.

And cooling and cutting the mixture subjected to extrusion molding to obtain the decorative line shown in figure 1.

Example 2

The amount of modified CPVC resin particles used in the raw materials for making the decorative molding was changed to 14 parts, and the other steps were the same as in example 1.

Example 3

The amount of the modified CPVC resin particles used in the raw material for making decorative molding was changed to 10 parts, and the other steps were the same as in example 1.

Comparative example 1

The other steps were the same as in example 1 except that the modified CPVC resin particles, the polystyrene particles, and the polymethyl methacrylate were not added to the raw materials for preparing the molding.

Comparative example 2

The raw materials for preparing the decorative lines are not added with the modified CPVC resin particles, the polystyrene particles and the polymethyl methacrylate, the using amount of the PVC is changed to 90 parts, and other steps are the same as those of the example 1.

The decorative molding obtained in examples 1 to 3 and comparative examples 1 to 2 was subjected to a performance test, and the results are shown in table 1.

Table 1 results of performance testing

Test item	Test standard	Example 1	Example 2	Example 3	Comparative example 1	Comparative example 2
							Impact Strength (KJ/m) ² )	GB/T 1943	18.04	19.64	21.72	14.7	15.5
Tensile strength (Mpa)	GB/T 1040	43	45	49	51	53
							Vicat softening point (. Degree. C.)	GB/T 1633	117.3	117.5	118.7	120.6	120.4

As can be seen from the data in table 1, the addition of the modified CPVC particles to the decorative strands increases the toughness while reducing the tensile strength and vicat softening point within reasonable ranges.

In order to study the effect of the CPVC chlorine content on the decorative strip, a chlorine content optimization experiment was performed, and other steps are the same as in example 1, so that the decorative strip prepared with CPVC chlorine contents of 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79% and 80% respectively has tensile yield strength and elongation at break, and the test results are averaged three times, and are shown in fig. 2.

FIG. 2 chlorine content optimization experimental data

CPVC chlorine content/%)	Tensile yield strength/Mpa	Elongation at break/%
			60-65	39.94	152
65-70	39.84	155
			70-75	40.12	151
75-80	40.20	150

As is clear from Table 2, the decorative molding has the best strength when the chlorine content is 65 to 70%.

The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.

Claims

1. A molding, the molding being structured to include:

the base is provided with a first clamping piece;

the decorative cover plate is provided with a second clamping piece, the second clamping piece is clamped with the first clamping piece to fix the base and the decorative cover plate, and the middle of the second clamping piece is in an open shape;

the supporting strip is connected with the base.

2. The molding according to claim 1, wherein the first retaining member has a saw tooth thereon, the first retaining member comprises a first saw tooth strip and a second saw tooth strip, the first saw tooth strip is opposite to the second saw tooth strip, the first saw tooth strip and the second saw tooth strip are respectively provided with a saw tooth on opposite surfaces thereof, the first saw tooth strip and the second saw tooth strip are engaged with the second retaining member via saw teeth, and the number of engagement between the second retaining member and the first saw tooth strip and the number of engagement between the second retaining member and the second saw tooth strip are changed to realize the inclination of the decorative cover plate relative to the base.

3. The molding of claim 2, wherein the base has a threaded hole.

4. The molding of claim 2, wherein the number of engagements of the first retainer with the first serration strip is greater than the number of engagements of the first retainer with the second serration strip.

5. The molding of claim 2, further comprising a backing strip connected to the bottom of the base.

6. The molding of claim 5, wherein the number of the cushion strips is 2.

7. The molding of claim 1, wherein the support strip is an inverted V-shape.

8. The molding of claim 1, wherein the decorative cover plate is of an arc-shaped configuration, and the second retaining member is disposed on an intrados surface of the cover plate.