A two-color coextrusion floor mold

Abstract

The utility model discloses a kind of double-color co-extrusion floor mold, including the die head of fixed installation in the front end of extruder, the front end of die head is sequentially installed with core plate mould, panel mould and mouth mould, multiple die cores are horizontally arranged in die head, core plate mould, panel mould and mouth mould;The inside of core plate mould is provided with die cavity two, the inner wall top and inner wall bottom of die cavity two are respectively provided with multiple splicing convex edges and multiple splicing clamping grooves, and splicing convex edge and splicing clamping groove are interval arrangement.The utility model is provided with splicing convex edge, splicing clamping groove and fixed groove convex edge one in the inner wall of die cavity two of core plate mould, utilize upper feed inlet, lower feed inlet and fabric flow channel input surface layer raw material, through the inner wall setting of die cavity three of panel mould with fixed groove convex edge two and confluence cavity, double-color co-extrusion production when base material core plate and surface layer have the effect of mutual clamping, not only increase the contact area and increase bonding effect, also reach physical clamping effect, substantially improve bonding strength.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal mold technology, specifically a two-color co-extrusion flooring mold. Background Technology

[0002] Two-color co-extruded wood-plastic composite (WPC) flooring is an innovative material that combines the advantages of WPC flooring. Through co-extrusion technology and a co-extrusion die, it achieves the effect of two different colors on each side. Made from WPC composite materials, it typically consists of an environmentally friendly base layer and a weather-resistant surface layer. The two-color co-extrusion die is a key tool for producing WPC flooring with two different colored surface layers; its design and structure directly affect the flooring's appearance and production efficiency.

[0003] In existing co-extrusion production of two-color co-extruded wood-plastic composite (WPC) flooring, the raw materials for the surface layer and substrate are typically melted and directly extruded through a co-extrusion die, without any physical bonding structure, relying entirely on adhesive bonding. However, during use, prolonged exposure to temperature fluctuations and physical impacts can lead to separation between the surface layer and substrate, significantly reducing the lifespan of the WPC flooring. Research has revealed that the surface layer and substrate of WPC flooring, due to differences in materials and density, experience different degrees of thermal expansion and contraction. Under physical impact and temperature-induced expansion and contraction, the adhesion between the substrate and surface layer decreases, ultimately leading to separation. Therefore, to improve the bonding strength between the substrate and surface layer of the extruded WPC flooring, a novel two-color co-extrusion die structure has been designed and proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a two-color co-extrusion flooring mold, which aims to improve the bonding strength between the extruded two-color co-extruded wood-plastic flooring substrate and surface layer.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A two-color co-extrusion flooring die includes a die head fixedly installed at the front end of an extruder. A core plate die, a panel die, and a die head are sequentially installed at the front end of the die head. Multiple die cores are horizontally arranged inside the die head, the core plate die, the panel die, and the die head.

[0007] A support plate is fixed inside the mold cavity of the mold head. A guide plate is provided on one side of the support plate corresponding to the main feed port of the mold head. The mold core is fixed on the side of the support plate away from the guide plate.

[0008] The core plate mold has a second mold cavity inside. The top and bottom of the inner wall of the second mold cavity are respectively provided with multiple splicing protrusions and multiple splicing slots. The splicing protrusions and splicing slots are spaced apart. The front and back of the inner wall of the second mold cavity are provided with a first fixing groove protrusion. The front and back of the inner wall of the second mold cavity are also provided with splicing slots at positions above and below the first fixing groove protrusion.

[0009] The core plate mold is provided with an upper feed port and a lower feed port at its top and bottom, respectively. Inside the core plate mold, at the positions corresponding to the upper feed port and the lower feed port, there are fabric flow channels that bend toward the panel mold side.

[0010] The panel mold is provided with a mold cavity three at the position corresponding to the core board mold. The front and back of the inner wall of the mold cavity three are provided with a fixing groove protrusion two at the position corresponding to the fixing groove protrusion one. The top and bottom of the side of the mold cavity three corresponding to the core board mold are respectively provided with a confluence cavity that is connected to the two fabric flow channels.

[0011] Inside the die, at the position corresponding to the mold cavity three, there is a mold cavity four with the same shape as the mold cavity three.

[0012] Preferably, the guide plate has guide ramps on the front, back, top and bottom sides of the side away from the mold core, and the guide plate and the support plate are an integral structure.

[0013] Preferably, the mold core is a cylindrical rod-shaped component, and the mold core is divided into upper and lower groups, both of which are equidistantly arranged along the side of the support plate, and the upper and lower groups of mold cores are staggered.

[0014] Preferably, the cross-sections of the splicing protrusions and splicing slots are both trapezoidal.

[0015] Preferably, the vertical dimension and longitudinal dimension of the third mold cavity are both larger than the vertical dimension and longitudinal dimension of the second mold cavity, respectively.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The inner wall of the core board mold of this utility model is provided with splicing protrusions, splicing slots, and fixing slot protrusion one. The surface layer raw material is input through the upper feed port, lower feed port, and fabric flow channel. The inner wall of the panel mold cavity three is provided with fixing slot protrusion two and a confluence cavity. During the two-color co-extrusion production, the substrate core board and the surface layer have a mutual interlocking effect, which not only increases the contact area and enhances the bonding effect, but also achieves a physical interlocking effect, greatly improving the bonding strength, reducing the risk of delamination, and achieving the purpose of extending the service life of the two-color co-extruded wood-plastic flooring. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0020] Figure 3 This is a right view of the guide plate of this utility model;

[0021] Figure 4 This is a left view of the support plate of this utility model;

[0022] Figure 5 This is a side view of the core board mold of this utility model;

[0023] Figure 6 This is a side view of the panel mold of this utility model;

[0024] Figure 7 This is a cross-sectional view of the base plate of this utility model.

[0025] In the diagram: 1. Die head; 101. Die cavity one; 102. Main feed port; 2. Core plate die; 201. Die cavity two; 202. Splicing protrusion; 203. Splicing slot; 204. Fixing slot protrusion one; 205. Upper feed port; 206. Lower feed port; 207. Fabric flow channel; 3. Panel die; 301. Die cavity three; 302. Fixing slot protrusion two; 303. Merging cavity; 4. Die head; 401. Die cavity four; 5. Die core; 6. Support plate; 7. Guide plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-7 As shown, this utility model provides a technical solution: a two-color co-extrusion flooring mold, including a die head 1 fixedly installed at the front end of an extruder, a core plate mold 2, a panel mold 3 and a die 4 are sequentially installed at the front end of the die head 1, and multiple die cores 5 are horizontally arranged inside the die head 1, the core plate mold 2, the panel mold 3 and the die 4.

[0028] A support plate 6 is fixed inside the mold cavity 101 of the mold head 1. A guide plate 7 is provided on one side of the support plate 6 corresponding to the main feed port 102 of the mold head 1. The mold core 5 is fixed on the side of the support plate 6 away from the guide plate 7. The mold core 5 is a round rod-shaped component. The mold core 5 is divided into upper and lower groups, which are equidistantly arranged along the side of the support plate 6. The upper and lower groups of mold core 5 are staggered. The guide plate 7 is provided with guide slopes on the front, back, top and bottom sides of the side away from the mold core 5. The guide plate 7 and the support plate 6 are an integral structure.

[0029] The core mold 2 has a cavity 201 inside. The top and bottom of the inner wall of the cavity 201 are provided with multiple splicing protrusions 202 and multiple splicing slots 203 respectively. The cross-section of the splicing protrusions 202 and the splicing slots 203 are trapezoidal. The splicing protrusions 202 and the splicing slots 203 are spaced apart. The front and back of the inner wall of the cavity 201 are provided with fixing groove protrusions 204. The front and back of the inner wall of the cavity 201 are also provided with splicing slots 203 at the positions above and below the fixing groove protrusions 204.

[0030] The top and bottom of the core plate mold 2 are respectively provided with an upper feed port 205 and a lower feed port 206. Inside the core plate mold 2, at the positions corresponding to the upper feed port 205 and the lower feed port 206, there are fabric flow channels 207 that bend toward the panel mold 3.

[0031] A cavity 301 is provided at the position of the panel mold 3 corresponding to the core plate mold 2. The vertical and longitudinal dimensions of the cavity 301 are larger than those of the cavity 201. The front and back of the inner wall of the cavity 301 are provided with a fixing groove protrusion 204 at the position of the fixing groove protrusion 204. The top and bottom of the side of the cavity 301 corresponding to the core plate mold 2 are respectively provided with a confluence cavity 303 that communicates with the two fabric flow channels 207.

[0032] Inside the die 4, at the position corresponding to the mold cavity 301, there is a mold cavity 401 with the same shape as the mold cavity 301.

[0033] Working principle:

[0034] The substrate material is fed into the main feed port 102 and extruded into the substrate core board through the core board mold 2 cavity 201, splicing protrusion 202, splicing slot 203 and fixing slot protrusion 204, forming mounting and fixing slots on both sides and trapezoidal dovetail slots and dovetail strips on the upper and lower surfaces. The surface material is fed into the upper feed port 205, lower feed port 206 and fabric flow channel 207 and co-extruded onto the upper and lower surfaces of the substrate core board through the panel mold 3 cavity 301, fixing slot protrusion 202 and confluence cavity 303. The surface material is extruded into the dovetail slots and covers the dovetail strips, forming a mutual interlocking effect between the substrate core board and the surface layer. The bonding effect is increased by increasing the contact area and the physical interlocking effect is achieved through the dovetail structure, thereby greatly improving the bonding strength between the substrate and the surface layer.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A two-color co-extrusion flooring die, comprising a die head (1) fixedly installed at the front end of an extruder, characterized in that: The front end of the mold head (1) is sequentially equipped with a core plate mold (2), a panel mold (3) and a mouth mold (4), and multiple mold cores (5) are horizontally arranged inside the mold head (1), core plate mold (2), panel mold (3) and mouth mold (4); A support plate (6) is fixed inside the mold cavity (101) of the mold head (1). A guide plate (7) is provided on one side of the support plate (6) corresponding to the main feed port (102) of the mold head (1). The mold core (5) is fixed on the side of the support plate (6) away from the guide plate (7). The core plate mold (2) is provided with a second mold cavity (201). The top and bottom of the inner wall of the second mold cavity (201) are provided with multiple splicing protrusions (202) and multiple splicing slots (203). The splicing protrusions (202) and splicing slots (203) are spaced apart. The front and back of the inner wall of the second mold cavity (201) are provided with a first fixing groove protrusion (204). The front and back of the inner wall of the second mold cavity (201) are also provided with splicing slots (203) at positions above and below the first fixing groove protrusion (204). The core plate mold (2) is provided with an upper feed port (205) and a lower feed port (206) at its top and bottom respectively. The core plate mold (2) is provided with fabric flow channels (207) that bend toward the panel mold (3) at the positions corresponding to the upper feed port (205) and the lower feed port (206). The panel mold (3) is provided with a mold cavity three (301) at the position corresponding to the core plate mold (2). The inner front and inner back of the mold cavity three (301) are provided with a fixing groove protrusion two (302) at the position corresponding to the fixing groove protrusion one (204). The top and bottom of the mold cavity three (301) corresponding to the core plate mold (2) are respectively provided with a confluence cavity (303) that communicates with the two fabric flow channels (207). The die (4) has a cavity four (401) with the same shape as the cavity three (301) located inside the die (4).

2. The two-color co-extrusion flooring mold according to claim 1, characterized in that: The guide plate (7) has guide ramps on the front, back, top and bottom sides of the side away from the mold core (5), and the guide plate (7) and the support plate (6) are an integral structure.

3. The two-color co-extrusion flooring mold according to claim 1, characterized in that: The mold core (5) is a round rod-shaped component. The mold core (5) is divided into upper and lower groups, which are equidistantly arranged along the side of the support plate (6), and the upper and lower groups of mold cores (5) are staggered.

4. The two-color co-extrusion flooring mold according to claim 1, characterized in that: The cross-sections of the splicing protrusion (202) and the splicing slot (203) are both trapezoidal.

5. A two-color co-extrusion flooring mold according to claim 1, characterized in that: The vertical and longitudinal dimensions of the third cavity (301) are both larger than those of the second cavity (201).

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