CN216380399U - Noctilucent floor and manufacturing mold - Google Patents

Abstract

The utility model relates to an outdoor floor, in particular to a luminous floor and a manufacturing mold; belongs to the technical field of wood-plastic floors. A noctilucent floor comprises a rigid core layer and a hard surface layer at least covering the upper surface of the core layer, wherein the upper surface of the hard surface layer is provided with a containing body with a containing groove; and the luminous bar is also arranged in the accommodating groove. The accommodating body with the accommodating groove is arranged on the hard surface layer, and the luminous strip is arranged in the accommodating body, so that fluorescent materials are concentrated in the accommodating body; because the fluorescent materials are not dispersed in the base body of the floor, the mechanical strength of the whole floor is not influenced, and because the fluorescent materials are enriched together, the floor with enough fluorescent brightness can be built by only using a small amount of fluorescent materials, and the floor not only has the effect of prompting pedestrians at night, but also has the night scene decoration effect because the fluorescent brightness is enough.

Description

Noctilucent floor and manufacturing mold

Technical Field

The utility model relates to an outdoor floor, in particular to a luminous floor and a manufacturing mold; belongs to the technical field of wood-plastic floors.

Background

The existing outdoor floor is a common floor, the outline of which cannot be seen at night, and is particularly used on stairs, so that people can easily step on the floor and fall down. In order to solve the above problems, a concept of a fluorescent floor has been proposed.

The fluorescent floor is a floor capable of self-luminescence in the night. In brief, fluorescent substances are mixed into the wood-plastic raw materials, and the fluorescent floor is expected to be prepared by a conventional wood-plastic extrusion process. Considering the influence of the fluorescent substance on the floor and the influence of the wood plastic extrusion process on the fluorescent substance, the fluorescent floor required by people is difficult to manufacture by the simple process.

The utility model patent with the publication number of CN 104164082B discloses a preparation method of light-storage type luminous wood plastic. The method comprises the following steps: (1) blending 10-30 parts of light-storing luminescent pigment, 660-90 parts of PA, 1-5 parts of oxidant and 2-5 parts of ultraviolet resistant agent, and granulating on a granulator to obtain luminescent master batches; (2) and (2) adding the luminescent master batch prepared in the step (1) into a side extruder in a co-extrusion extruder for extrusion operation to obtain a luminescent wood-plastic surface layer, and adding the existing wood molding granules into a main extruder of the co-extrusion extruder for extrusion operation to obtain a luminescent wood-plastic bottom layer. The surface layer with light storage capacity and the bottom layer formed by extruding common wood plastic are integrally formed in a co-extrusion mode to form the composite fluorescent floor. The floor board is prepared by dispersing the fluorescent pigment in PA6 used for preparing the shell layer, and finally, the fluorescent pigment is distributed on the surface of the floor board in an integral way. On one hand, the addition of the fluorescent pigment influences the performance of the floor, and on the other hand, the fluorescent pigment has high dispersibility, and the fluorescent pigment with sufficient concentration can play a better fluorescent effect, so that the larger addition amount is needed for the high dispersibility to play a due fluorescent effect, and the larger addition amount further influences the performance of the floor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems, and therefore provides a noctilucent floor.

The technical scheme for solving the problems is as follows:

a noctilucent floor comprises a rigid core layer and a hard surface layer at least covering the upper surface of the core layer, wherein the upper surface of the hard surface layer is provided with a containing body with a containing groove; and the luminous bar is also arranged in the accommodating groove.

The utility model solves the problems by forming the accommodating body with the accommodating groove on the surface of the hard surface layer and then arranging the luminous strip in the accommodating groove. The luminous strip is internally provided with a substance capable of self-illuminating in dark environment, and the substance enables the luminous strip to have luminous property. The luminous strip can be inserted or clamped in the containing groove and can also be integrally formed with the luminous floor.

In the technical scheme of the utility model, on one hand, the luminous strip and the floor are actually independent from each other, and the fluorescent substance contained in the luminous strip does not influence the physical performance of the floor; on the other hand, fluorescent substances are concentrated in the luminous strips, and only a small amount of fluorescent substances are needed to realize a good luminous effect due to the concentration. Different from the prior art, the fluorescent floor in the prior art is that the surface layer of the whole floor emits fluorescence at night, the luminous area is large, but the light is weak, only has a prompting function, and is difficult to play a night scene decoration role. The luminous floor is small in luminous area and strip-shaped, but high in fluorescence brightness, and not only can prompt pedestrians, but also can play a role in night scene decoration.

Preferably, in the above technical solution, the receiving groove is parallel to the length direction of the floor.

Preferably, the container is disposed centrally.

Preferably, the accommodating body has one or more than one accommodating bodies.

Preferably, the accommodating groove comprises a groove bottom and a left groove wall and a right groove wall; the upper end surfaces of the left and right groove walls are respectively and integrally connected with the hard surface layers at the left and right sides of the accommodating groove, and the lower end surfaces are respectively and integrally connected with the two ends of the groove bottom; a notch is formed between the two upper end surfaces of the left and right groove walls, and the width of the notch is smaller than that of the groove bottom, so that the accommodating groove forms a necking structure.

Preferably, the left and right groove walls form an included angle alpha with the groove bottom, and alpha is more than 30 degrees and less than 85 degrees.

Preferably, in the above aspect, an engagement groove is formed in a corresponding portion of the upper surface of the rigid core layer and the accommodating body, and the accommodating body is disposed in the engagement groove.

Preferably, the mating groove is a flat groove or a dovetail groove.

Preferably, the core layer is made of polyolefin wood plastic or hard foamed PVC; the material of the surface layer is selected from one of ASA, PMMA, PA, PP, HDPE and PC.

Another object of the utility model is to provide a mold for preparing the noctilucent floor.

A mould used for preparing the above-mentioned floor, comprising the first mould discharging plate, the second mould discharging plate, multiple runner forming plates and multiple mould plates including the mould feeding plate are butted to get final product;

the mold is provided with a core layer preparation assembly comprising a main runner, a surface layer preparation assembly comprising a co-extrusion runner and a noctilucent strip preparation assembly comprising a fluorescent runner; the surface layer preparation assembly is arranged between the core layer preparation assembly and the noctilucent strip preparation assembly;

the co-extrusion flow channel comprises a first side inlet, an upper co-extrusion flow channel, a flow guide interval, a lower co-extrusion flow channel and a co-extrusion flow channel outlet which are sequentially connected; the lower co-extrusion flow channel is gradually close to the main flow channel along the discharging direction and is communicated with the main flow channel at the outlet of the co-extrusion flow channel; the co-extrusion runner outlet is arranged at the main runner outlet and covers at least the upper surface of the main runner outlet;

the fluorescence flow channel comprises a second side inlet, an upper fluorescence flow channel, a lower fluorescence flow channel and a fluorescence flow channel outlet which are sequentially connected; the lower fluorescent flow channel is communicated with the mixed flow channel at the outlet of the fluorescent flow channel; the mixing channel is formed by extending the main channel and the co-extrusion channel in the discharging direction; the outlet of the fluorescent flow channel is arranged at the outlet of the mixing flow channel;

the plurality of flow channel forming plates at least comprise a first flow channel forming plate, a second flow channel forming plate and a third flow channel forming plate which are sequentially butted in the direction from the first die discharging plate to the die feeding plate; the third flow channel forming plate is directly connected with the die feeding plate or connected with other flow channel forming plates; the first flow channel forming plate is provided with a first bulge corresponding to the matching groove; the first bulge is gradually enlarged along the discharging direction; a second bulge corresponding to the accommodating body is arranged on the second mold discharging plate; the second bulge is gradually enlarged along the discharging direction; the setting position of the second bulge corresponds to the first bulge, the setting position of the fluorescent flow channel outlet corresponds to the second bulge, and the fluorescent flow channel outlet is arranged in front of the second bulge according to the discharging direction.

The mold is divided into three types, one type is suitable for manufacturing a solid non-foaming floor, for example, a core layer material of the floor is made of PE wood plastic, and a surface layer material of the floor is made of ASA; one is suitable for manufacturing hollow non-foaming floor boards, if the floor boards are made of the same material as the former, the difference is that the floor boards are of a hollow structure, and the difference of the manufacturing method of the two floor boards is that the latter is only provided with a core rod in a mould, and the core rod extends out of an outlet of the mould; the other is a solid foamed floor, if the core layer of the floor is hard foamed PVC and the surface layer is ASA, the floor is different from the solid non-foamed floor in mold design, mainly the rear half part of the main flow channel is designed into a foaming cavity, and a choke core rod is preferably arranged in the main flow channel. In addition, the manufacturing of the hollow foamed floor is not considered, so that the manufacturing of the mold is troublesome, and the hollow foamed floor has hidden troubles in product structure.

The design of the die mainly has three key points, namely how to form a matching groove on the core layer, how to form a surface layer with the accommodating body, and how to fill the fluorescent material into the accommodating groove of the accommodating body. The first problem is the simplest and simplest method, only a gradually-enlarged bulge is designed at the outlet of a main flow channel, and then the formed core layer material is extruded to form a groove corresponding to the bulge; the second problem is complicated, a surface layer is formed on the surface of the core layer, and the surface layer is easy to process if the core layer is in a conventional rectangular shape. The inventor firstly thinks that the outlet of the co-extrusion runner is designed into the shape required by the surface layer, and actually finds that the treatment is very difficult in the runner forming of the die, namely, the co-extrusion runner is transited from the annular shape to the special shape, which has great difficulty in the die processing; finally, the inventor designs a second bulge on the discharge plate of the second die by additionally arranging the discharge plate of the second die, so that the surface of the second bulge is in transitional connection with the outlet of the co-extrusion runner, and the outlet of the co-extrusion runner is still designed into a conventional rectangle; the third problem is also complicated, it is not superficially sufficient to fill the fluorescent material in the receiving groove, since in the production process, when the floor is extruded, the receiving groove is moved relative to the mold, and the moved receiving groove is the actual mold of the fluorescent material, in fact, the problem becomes to extrude the material from a mold moving forward at a constant speed; therefore, the fluorescent material needs to have a faster extrusion speed, so that in the application, the aperture of the upper fluorescent flow channel is larger than that of the lower fluorescent flow channel, and the lower fluorescent flow channel is designed vertically; the flow channel design can enable the fluorescent material to have higher discharge rate.

Preferably, the lower fluorescent runner is formed by butting the first mold discharging plate and the second mold discharging plate.

Preferably, the main flow channel includes a front section with a relatively small aperture and a rear section with a relatively large aperture; and a flow blocking core rod is arranged in the main flow passage.

Preferably, in the above-described aspect, the position of the choke rod corresponds to at least a rear half of the front section and a front half of the rear section.

Preferably, the choke plug occupies at least 50% of the cross-sectional area of the front section; occupying at least 30% of the cross-sectional area of the rear section.

Preferably, the upper co-extrusion flow channel is divided into two branch channels and communicated with the lower co-extrusion flow channel through the same flow guide section, and the lower co-extrusion flow channel is a gradually contracted annular channel; and the co-extrusion runner outlet surrounds the main runner outlet.

Preferably, the diversion area is two inclined plane spaces which are gradually flat and are communicated with each other; and a buffer groove is arranged at the joint of the diversion section and the lower co-extrusion runner. Utility model

In conclusion, the utility model has the following beneficial effects:

1. the accommodating body with the accommodating groove is arranged on the hard surface layer, and the luminous strip is arranged in the accommodating body, so that fluorescent materials are concentrated in the accommodating body; because the fluorescent materials are not dispersed in the base body of the floor, the mechanical strength of the whole floor is not influenced, and because the fluorescent materials are enriched together, the floor with enough fluorescent brightness can be built by only using a small amount of fluorescent materials, and the floor not only has the effect of prompting pedestrians at night, but also has the night scene decoration effect because the fluorescent brightness is enough.

2. The utility model compounds the luminous strip on the floor through the design of the dovetail groove, and has good combination effect;

3. the luminous floor is manufactured by the newly designed mould, and has the advantages of good formability and high production efficiency;

4. the utility model solves the manufacturing problem of the noctilucent floor through the design of the die, and the die has the advantages of ingenious structural design, smooth discharging of the runner and good formability.

Drawings

FIG. 1 is a schematic structural diagram of a product according to a first embodiment of the present invention;

FIG. 2 is a schematic overall view of a mold structure according to a first embodiment of the present invention;

FIG. 3 is a sectional view taken along line B-B of FIG. 2;

FIG. 4 is a cross-sectional view taken along line C1-C1 of FIG. 2;

FIG. 5 is a cross-sectional view taken along line C2-C2 of FIG. 2;

FIG. 6 is a cross-sectional view taken along line C3-C3 of FIG. 2;

FIG. 7 is a sectional view taken along line D-D of FIG. 2;

FIG. 8 is a schematic structural diagram of a product according to a second embodiment of the present invention;

FIG. 9 is a schematic overall view of a mold structure according to a second embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a product according to a third embodiment of the present invention;

in the figure, 1-rigid core layer, 2-hard surface layer, 3-night bar; 11-matching groove, 21-containing body;

10-a main flow channel, 20-a flow blocking core rod, S1-a co-extrusion flow channel, S2-a fluorescent flow channel and S3-a mixed flow channel;

10-1-the front section of the main runner, 10-2-the rear section of the main runner and 10-3-the outlet of the main runner;

s1-1-a first side inlet, S1-2-an upper co-extrusion flow channel, S1-3-a flow guide section, S1-4-a lower co-extrusion flow channel, S1-5-a co-extrusion flow channel outlet and 34-a buffer groove; s2-1-second side inlet, S2-2-upper fluorescent flow channel, S2-3-lower fluorescent flow channel, and S2-4-fluorescent flow channel outlet; c11-first bump, B21-second bump;

a-a first mold discharging plate, B-a second mold discharging plate, C-a first flow channel forming plate, D-a second flow channel forming plate, E-a third flow channel forming plate, F-a fourth flow channel forming plate, G-a fifth flow channel forming plate, and H-a mold feeding plate.

Detailed Description

The utility model is further explained below with reference to the drawings.

This detailed description is to be construed as illustrative only and is not limiting, since modifications will occur to those skilled in the art upon reading the preceding specification, and it is intended to be protected by the following claims.

Example one

A noctilucent floor board is provided with a rigid core layer 1 and a hard surface layer 2 covering the rigid core layer 1, as shown in figure 1. An accommodating body 21 having an accommodating groove is formed on the upper surface of the hard surface layer 2; the luminous strip is characterized by further comprising a luminous strip 3 arranged in the accommodating groove. The containing groove is arranged in parallel with the length direction of the floor. The accommodating groove comprises a groove bottom and a left groove wall and a right groove wall; the upper end surfaces of the left and right groove walls are respectively and integrally connected with the hard surface layers at the left and right sides of the accommodating groove, and the lower end surfaces are respectively and integrally connected with the two ends of the groove bottom; a notch is formed between the two upper end surfaces of the left and right groove walls, and the width of the notch is smaller than that of the groove bottom, so that the accommodating groove forms a necking structure. A matching groove 11 is formed on the upper surface of the rigid core layer 1 corresponding to the accommodating body 21, and the accommodating body 21 is arranged in the matching groove 11. As can be seen from fig. 1, in the embodiment, the mating grooves 11 are dovetail grooves, and have similar structures to the accommodating grooves.

In this embodiment, the rigid core layer 1 is made of rigid foamed PVC, and the surface layer is made of ASA.

A method for manufacturing the noctilucent floor comprises the following steps:

1) melting and plasticizing materials forming the rigid core layer of the floor by an extruder from an inlet of a main runner, extruding the materials into the main runner, and then extruding the materials from an outlet of the main runner to obtain a core layer plate with a matching groove 11;

2) melting and plasticizing materials forming the hard surface layer of the floor by a second extruder from a first side inlet, extruding the materials into the second extruder, and extruding the materials from a co-extrusion runner outlet to obtain a plate blank which is formed by coating the surface layer materials on the core layer materials and is provided with an accommodating body 21;

3) and melting and plasticizing materials forming the floor luminous strip from the second side inlet by a third extruder, extruding the materials into the second side inlet, and extruding the materials from the outlet of the mixing flow channel to obtain the luminous floor.

As shown in fig. 2 to 7, the mold for manufacturing the noctilucent floor is formed by sequentially butting a plurality of mold plates including a first mold discharge plate a, a second mold discharge plate B, a first flow channel forming plate C, a second flow channel forming plate D, a third flow channel forming plate E, a fourth flow channel forming plate F, a fifth flow channel forming plate G and a mold feed plate H.

The mold is provided with a core layer preparation assembly comprising a main runner 10, a surface layer preparation assembly comprising a co-extrusion runner S1 and a noctilucent strip preparation assembly comprising a fluorescent runner S2; the surface layer preparation assembly is arranged between the core layer preparation assembly and the noctilucent strip preparation assembly;

the co-extrusion flow channel S1 comprises a first side inlet S1-1, an upper co-extrusion flow channel S1-2, a flow guide section S1-3, a lower co-extrusion flow channel S1-4 and a co-extrusion flow channel outlet S1-5 which are sequentially connected; the lower co-extrusion flow channel S1-4 is gradually close to the main flow channel 10 along the discharging direction and is communicated with the main flow channel 10 at the outlet S1-5 of the co-extrusion flow channel; the co-extrusion flow channel outlet S1-5 is arranged at the main flow channel outlet 10-3 and covers the periphery of the main flow channel outlet 10-3;

the fluorescent flow channel S2 comprises a second side inlet S2-1, an upper fluorescent flow channel S2-2, a lower fluorescent flow channel S2-3 and a fluorescent flow channel outlet S2-4 which are sequentially connected; the lower fluorescent flow channel S2-3 is communicated with the mixed flow channel S3 at the fluorescent flow channel outlet S2-4; the mixing channel S3 is a mixing channel formed by extending the main channel 10 and the co-extrusion channel S1 in the discharging direction; the fluorescent flow channel outlet S2-4 is arranged at the outlet S3-1 of the mixing flow channel;

the first flow passage forming plate C is provided with a first protrusion C11 corresponding to the fitting groove 11; the first bulge C11 becomes larger along the discharging direction; a second bulge B21 corresponding to the accommodating body 21 is arranged on the second die discharging plate B; the second bulge B21 becomes larger along the discharging direction; the second protrusion B21 is disposed at a position corresponding to the first protrusion C11, the fluorescent light path outlet S2-4 is disposed at a position corresponding to the second protrusion B21, and the fluorescent light path outlet S2-4 is disposed in front of the second protrusion B21 according to the discharging direction.

As can be seen from FIGS. 2 and 7, the upper co-extrusion flow channel S1-2 is divided into two branch channels and is communicated with the lower co-extrusion flow channel S1-4 through the same flow guide section S1-3. The diversion section S1-3 is two inclined plane spaces which are gradually flat and are mutually communicated (because of communication, namely the same diversion section is formed); and a buffer groove 34 is arranged at the joint of the flow guide section S1-3 and the lower co-extrusion runner S1-4. The buffer groove 34 can serve as a stock material, and almost half of the material flow will flow through the buffer groove 34, which is significant for the material flow of the lower co-extrusion flow channel S1-4.

As can be seen by comparing FIG. 2 with FIGS. 4 to 7, the lower co-extrusion flow channel S1-4 is a gradually shrinking annular channel; and the co-extrusion runner outlet S1-5 surrounds the primary runner outlet 10-1.

As can be seen from fig. 2, the main flow passage 10 includes a front section 10-1 with a relatively small aperture and a rear section 10-2 with a relatively large aperture; a choke core rod 20 is arranged in the main flow passage 10. The arrangement position of the choke core rod 20 corresponds to the rear half section of the front section 10-1 and the front half section of the rear section 10-2.

As can be seen in fig. 2 and 7, the choked core rod 20 occupies about 50% of the cross-sectional area of the front section 10-1; occupying about 30% of the cross-sectional area of the rear section 10-1. And as can also be seen from fig. 2, water cooling channels are also provided on the second flow channel forming plate D. This is because the core of the flooring manufactured by this embodiment is foamed. The above design is to cool the foam core at different positions to achieve different degrees of foaming at different positions, for example, the middle part of the core layer is cooled to the minimum degree, and the material enters the foaming cavity and leaves the choke core rod 20 to have the largest foaming space, so the middle part of the core layer has the highest foaming degree, which can reach 0.6g/cm for cultivation, and the area close to the wall of the main runner cavity is not only limited in foaming space, but also affected by the temperature of the cooling water, the foaming degree is low, which can reach more than 1.0 g/cm for cultivation, and especially forms crusts in the area close to the wall of the cavity, and the crusts are more than 1.0mm, usually between 1.5 mm and 3.0 mm; in the middle area of the two, the foaming degree is moderate and can reach 0.8 g/cm for cultivation; thereby forming a foam core with a gradient. Due to the reasonable structure, the foam core has higher mechanical strength than the common foam core under the same density.

The cross-sectional orientation of fig. 6 differs from that of fig. 3, 4, 5 and 7. The choke rod 20 is not shown in fig. 6. The dashed boxes in FIG. 6 indicate the shape that the lower co-extrusion flow path S1-4 will take.

In conjunction with fig. 4 and 5, it can be seen that the first protrusions in fig. 4 are somewhat larger than the first protrusions C11 in fig. 5 because the first protrusions C11 are gradually larger in the extrusion direction. In FIG. 4, the dashed box represents the initial shape of the lower co-extrusion flow path S1-4. In fig. 3, the dashed line represents the separation line between the rigid core layer 1 and the hard surface layer 2 of the floor panel, and the line is indicated by a dashed line since it does not actually exist.

As can be seen from fig. 2 and 3, the lower fluorescent runner S2-3 is formed by the first mold discharging plate a and the second mold discharging plate B in a butt joint manner.

Example two

A luminous floor is shown in figure 8 and has basically the same structure as the embodiment. The difference is that the core layer of the floor board of the embodiment is non-foamed and is made of PE wood plastic. Therefore, the mold for manufacturing the floor board of the present embodiment is different from the first embodiment. The details are as follows.

As shown in fig. 9, the mold is also formed by sequentially butting a plurality of mold plates including a first mold discharge plate a, a second mold discharge plate B, a first flow channel forming plate C, a second flow channel forming plate D, a third flow channel forming plate E, a fourth flow channel forming plate F, a fifth flow channel forming plate G and a mold feed plate H.

The mold is different from the mold of the second embodiment in that the shape of the primary flow channel is different, and a foaming cavity is not needed because foaming is not needed; secondly, according to the conventional design, the front section of the main runner is designed to be slightly larger, and the rear section of the main runner is designed to be slightly smaller; thirdly, a flow blocking core rod is not needed; and fourthly, a second flow passage is eliminated to form a cooling water passage at the plate. Other structures are the same, and thus are not described in detail.

EXAMPLE III

A noctilucent floor board is shown in figure 10 and is basically the same as the second embodiment in structure. The difference is that the mating groove 11 of the present embodiment is rectangular, i.e., a flat groove, not a dovetail groove. However, the receiving groove of this embodiment is still in a dovetail groove shape, that is, the outer peripheral contour of the receiving body 21 of this embodiment is rectangular, and the inner peripheral contour is in a dovetail groove shape.

The floor board is manufactured by only modifying the mold of the second embodiment properly, and the modification is only the shape of the first protrusion C11, which is designed to be rectangular. Also, the rectangle is required to be gradually enlarged.

Other structures are the same, and thus are not described in detail.

Claims (9)

1. A night light floor, includes rigid core layer (1) and at least cladding rigid core layer upper surface's stereoplasm top layer (2), its characterized in that: an accommodating body (21) with an accommodating groove is formed on the upper surface of the hard surface layer (2); the luminous strip is arranged in the containing groove and comprises a luminous strip (3).

2. A luminous floor as claimed in claim 1, characterized in that: the containing groove is arranged in parallel with the length direction of the floor.

3. A luminous floor as claimed in claim 2, characterized in that: the accommodating groove comprises a groove bottom and a left groove wall and a right groove wall; the upper end surfaces of the left and right groove walls are respectively and integrally connected with the hard surface layers at the left and right sides of the accommodating groove, and the lower end surfaces are respectively and integrally connected with the two ends of the groove bottom; a notch is formed between the two upper end surfaces of the left and right groove walls, and the width of the notch is smaller than that of the groove bottom, so that the accommodating groove forms a necking structure.

4. A luminous floor as claimed in claim 2, characterized in that: a matching groove (11) is formed at the corresponding position of the upper surface of the rigid core layer (1) and the accommodating body (21), and the accommodating body (21) is arranged in the matching groove (11).

5. A luminous floor as claimed in claim 4, characterized in that: the matching groove (11) is a flat groove or a dovetail groove.

6. A luminous floor as claimed in claim 2, characterized in that: the rigid core layer (1) is made of polyolefin wood plastic or hard foamed PVC; the material of the surface layer is selected from one of ASA, PMMA, PA, PP, HDPE and PC.

7. A mould for preparing the noctilucent floor board of claim 4 or 5, wherein: the die is formed by sequentially butting a plurality of die plates including a first die discharging plate (A), a second die discharging plate (B), a plurality of runner forming plates (C-G) and a die feeding plate (H);

the mold is provided with a core layer preparation assembly comprising a main runner (10), a surface layer preparation assembly comprising a co-extrusion runner (S1) and a noctilucent strip preparation assembly comprising a fluorescent runner (S2); the surface layer preparation assembly is arranged between the core layer preparation assembly and the noctilucent strip preparation assembly;

the co-extrusion flow channel (S1) comprises a first side inlet (S1-1), an upper co-extrusion flow channel (S1-2), a flow guide section (S1-3), a lower co-extrusion flow channel (S1-4) and a co-extrusion flow channel outlet (S1-5) which are sequentially connected; the lower co-extrusion flow channel (S1-4) is gradually close to the main flow channel (10) along the discharging direction and is communicated with the main flow channel (10) at the outlet (S1-5) of the co-extrusion flow channel; the co-extrusion flow channel outlet (S1-5) is arranged at the main flow channel outlet (10-3) and covers at least the upper surface of the main flow channel outlet (10-3);

the fluorescent flow channel (S2) comprises a second side inlet (S2-1), an upper fluorescent flow channel (S2-2), a lower fluorescent flow channel (S2-3) and a fluorescent flow channel outlet (S2-4) which are sequentially connected; the lower fluorescent flow channel (S2-3) is communicated with the mixed flow channel (S3) at the fluorescent flow channel outlet (S2-4); the mixing channel (S3) is a mixing channel formed by extending the main channel (10) and the co-extrusion channel (S1) in the discharging direction; the fluorescent flow channel outlet (S2-4) is arranged at the outlet (S3-1) of the mixing flow channel;

the plurality of flow channel forming plates (C-G) at least comprise a first flow channel forming plate (C), a second flow channel forming plate (D) and a third flow channel forming plate (E) which are sequentially butted in the direction from the first mold discharging plate (A) to the mold feeding plate (H); the third flow channel forming plate (E) is directly connected with the die feeding plate (H) or connected with other flow channel forming plates; the first flow passage forming plate (C) is provided with a first protrusion (C11) corresponding to the matching groove (11); the first bulge (C11) becomes larger along the discharging direction; a second bulge (B21) corresponding to the accommodating body (21) is arranged on the second die discharging plate (B); the second bulge (B21) becomes larger along the discharging direction; the second protrusion (B21) is disposed at a position corresponding to the first protrusion (C11), the fluorescent flow path outlet (S2-4) is disposed at a position corresponding to the second protrusion (B21), and the fluorescent flow path outlet (S2-4) is disposed in front of the second protrusion (B21) in terms of the discharging direction.

8. The mold of claim 7, wherein: the main flow channel (10) comprises a front section (10-1) with a relatively small hole diameter and a rear section (10-2) with a relatively large hole diameter; a flow blocking core rod (20) is arranged in the main flow passage (10).

9. The mold of claim 8, wherein: the arrangement position of the core rod (20) at least corresponds to the rear half section of the front section (10-1) and the front half section of the rear section (10-2).

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