Die core structure of double-color or three-color hollow grid plate extrusion die head

Abstract

The invention provides a die core structure of a double-color or three-color hollow grid plate extrusion die head, which comprises a die core body, an upper die lip, a first extrusion channel, a lower die lip and a second extrusion channel, the die core body comprises a connecting part and an extrusion part, the upper part of the front end of the extrusion part is provided with a first transverse discharge chute, and the lower part of the front end of the extrusion part is provided with a second transverse discharge chute; a series of vertical discharging grooves are formed in the front end of the extrusion part, the first transverse discharging groove, the second transverse discharging groove and the vertical discharging grooves cut the front end of the extrusion part into a plurality of rectangular extrusion areas, and feeding grooves are formed in the top face and the bottom face of the rear side of the extrusion part in the breadth direction correspondingly. The first extrusion channel, the feeding groove, the vertical discharging groove and the second extrusion channel are communicated, the connecting part is provided with three through air holes, the three air holes extend forwards in the breadth direction to form a series of air hole channels, and the front end of each air hole channel correspondingly penetrates to one rectangular extrusion area. The double-color or three-color hollow grid plate can be smoothly extruded and produced.

Description

Technical Field

[0001] The invention relates to the technical field of extrusion die heads, in particular to a die core structure of a double-color or three-color hollow grid plate extrusion die head. Background Art

[0002] Hollow grid sheets are usually used in construction, decoration or other applications that require lightweight and high strength materials. It allows the injection of colored plastics, and through the design of the die head, the final product has a two-color or three-color multi-layer structure. Conventional hollow die heads do not meet production needs. Summary of the invention

[0003] In view of the above problems, the present invention aims to provide a core structure of a two-color or three-color hollow grid plate extrusion die head, which can smoothly extrude and produce two-color or three-color hollow grid plates.

[0004] The technical solution of the present invention is a core structure of a two-color or three-color hollow grid plate extrusion die head, characterized in that: it includes a core body corresponding to the width of the die body, the top surface of the core body and the upper die lip form a first extrusion channel, the bottom surface of the core body and the lower die lip form a second extrusion channel, the core body includes a connecting part connected to the die body at the rear side and an extrusion part at the front side, the upper front end of the extrusion part is provided with a first horizontal discharge groove, the lower front end of the extrusion part is provided with a second horizontal discharge groove, the front end of the extrusion part is provided with a series of vertical discharge grooves, the vertical discharge grooves The extrusion portion is evenly distributed along the width direction, and the first transverse discharge groove, the second transverse discharge groove, and the vertical discharge groove cut the front end of the extrusion portion into a plurality of rectangular extrusion areas. The top surface and the bottom surface of the rear side of the extrusion portion are respectively provided with feed grooves along the width direction. The first extrusion channel, the feed groove, the vertical discharge groove, and the second extrusion channel are connected. The connecting portion is provided with three air holes penetrating the left and right sides thereof, and the three air holes respectively extend a series of air hole channels forward along the width direction, and the front end of each air hole channel corresponds to penetrating into a rectangular extrusion area.

[0005] Preferably, the left and right ends of the first transverse discharge chute and the second transverse discharge chute are both provided with guide bars arranged front and back to guide the flow of the raw materials.

[0006] Preferably, the rear side surface of the connection portion is provided with two upper and lower rows of threaded connection holes, and screws pass through the threaded connection holes to fix the mold core body to the mold head.

[0007] Preferably, both the connecting portion and the extrusion portion are inclined surfaces that are larger at the rear and smaller at the front, and the taper of the inclined surface of the extrusion portion is smaller than the taper of the inclined surface of the connecting portion.

[0008] Preferably, a first feed channel connected to the first transverse discharge trough and a second feed channel connected to the second transverse discharge trough are respectively provided at upper and lower positions in the connecting portion.

[0009] The present invention can smoothly extrude and produce two-color or three-color hollow grid plates, and each rectangular extrusion area cooperates with air blowing to ensure that each grid will not adhere to each other, so as to ensure the appearance and quality requirements of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 The structural diagram of the middle mold core; Figure 3 for Figure 2 A schematic diagram of the structure from another perspective; Figure 4 It is a structural schematic diagram of the mold core body cut from the vertical discharge chute position; Figure 5 A schematic diagram of a partial structure in which guide strips are arranged on the surfaces of the first transverse discharge groove and the second transverse discharge groove in the mold core body; Figure 6 It is a schematic diagram of the local structure of the mold core body in the present invention; Figure 7 It is a cross-sectional schematic diagram of the flow channel and the air hole channel inside the mold core body of the present invention; Among them: 1—mold core body; 11—connecting part; 111—air hole; 112—air hole channel; 113—threaded connecting hole; 114—first feed channel; 115—second feed channel; 12—extrusion part; 121—first horizontal discharge trough; 122—second horizontal discharge trough; 123—vertical discharge trough; 124—rectangular extrusion area; 125—feed trough; 126—guide strip; 2—upper die lip; 3—first extrusion channel; 4—lower die lip; 5—second extrusion channel. DETAILED DESCRIPTION

[0011] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0012] like Figures 1 to 7As shown, the present invention provides a core structure of a two-color or three-color hollow grid plate extrusion die head, including a core body 1 corresponding to the width of the die body, the top surface of the core body 1 and the upper die lip 2 form a first extrusion channel 3, the bottom surface of the core body 1 and the lower die lip 4 form a second extrusion channel 5, the core body 1 includes a connecting portion 11 connected to the die body at the rear side and an extrusion portion 12 at the front side, the upper front end of the extrusion portion 12 is provided with a first lateral discharge groove 121, the lower front end of the extrusion portion 12 is provided with a second lateral discharge groove 122, the front end of the extrusion portion 12 is provided with a series of vertical discharge grooves 123, and the vertical discharge grooves 123 are uniformly arranged along the width direction of the extrusion portion 12 The first lateral discharge groove 121, the second lateral discharge groove 122 and the vertical discharge groove 123 cut the front end of the extrusion part 12 into a plurality of rectangular extrusion areas 124. The top and bottom surfaces of the rear side of the extrusion part 124 are respectively provided with feed grooves 125 along the width direction. The first extrusion channel 3, the feed groove 125, the vertical discharge groove 123 and the second extrusion channel 5 are connected. The connecting part 11 is provided with three air holes 111 penetrating the left and right sides thereof. The three air holes 111 respectively extend forward a series of air hole channels 112 along the width direction, and the front end of each air hole channel 112 penetrates into a rectangular extrusion area 124 correspondingly.

[0013] In the above scheme, the left and right ends of the first lateral discharge chute 121 and the second lateral discharge chute 122 are provided with guide bars 126 arranged front and back to guide the flow of raw materials, so as to separate different raw materials from each other, especially between colored raw materials and colorless raw materials, to prevent mixing that affects the quality of the product.

[0014] Specifically, the rear side surface of the connection portion 11 is provided with two upper and lower rows of threaded connection holes 113 , and screws pass through the threaded connection holes 113 to fix the mold core body 1 on the mold head.

[0015] Specifically, both the connecting portion 11 and the extrusion portion are inclined surfaces that are larger at the rear and smaller at the front, and the taper of the inclined surface of the extrusion portion 12 is smaller than the taper of the inclined surface of the connecting portion 11 .

[0016] Furthermore, a first feed channel 114 connected to the first transverse discharge groove 121 and a second feed channel 115 connected to the second transverse discharge groove 122 are respectively provided at upper and lower positions in the connection portion 11 .

[0017] The present invention arranges a first transverse discharge groove 121, a second transverse discharge groove 122, and a vertical discharge groove 123 on the mold core body 1, and then cuts the front end of the extrusion part 12 into a plurality of rectangular extrusion areas 124, cooperates with the first extrusion channel 3 and the second extrusion channel 5, to form four layers of independent transverse channels and a series of vertical channels arranged at equal intervals, the colorless raw material is extruded from the first extrusion channel 3 and the second extrusion channel 5 to form the top layer and bottom layer transverse thin-walled plates of the hollow grid plate product, the colored raw material is extruded from the first transverse discharge groove 121 and the second transverse discharge groove 122 to form two middle layers of transverse thin-walled plates with specific colors, and at the same time, the colorless raw material in the first extrusion channel 3 and the second extrusion channel 5 will enter the vertical discharge groove 123, and arrive between the upper and lower adjacent transverse thin-walled plates to form vertical thin-walled plates, and the vertical thin-walled plates support the above-mentioned transverse thin-walled plates, and finally form a two-color or three-color hollow grid plate product. At the same time, gas of set pressure is introduced into both ends of the air hole 111, and the gas passes through each air hole channel 112 to reach each rectangular extrusion area 124 and blows forward, which has the effect of shaping and cooling the vertical thin-walled plates and transverse thin-walled plates on the outside to prevent them from sticking to each other, and finally extrude qualified products.

[0018] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the invention. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A core structure of a two-color or three-color hollow grid plate extrusion die head, characterized in that: The invention comprises a die core body (1) corresponding to the width of the die body, the top surface of the die core body (1) and the upper die lip (2) form a first extrusion channel (3), the bottom surface of the die core body (1) and the lower die lip (4) form a second extrusion channel (5), the die core body (1) comprises a connecting portion (11) connected to the die body at the rear side and an extrusion portion (12) at the front side, a first transverse discharge groove (121) is arranged at the upper front end of the extrusion portion (12), a second transverse discharge groove (122) is arranged at the lower front end of the extrusion portion (12), a series of vertical discharge grooves (123) are arranged at the front end of the extrusion portion (12), the vertical discharge grooves (123) are evenly distributed along the width direction of the extrusion portion (12), and the first transverse discharge grooves (121) are arranged at the upper front end of the extrusion portion (12). 21), a second transverse discharge trough (122), and a vertical discharge trough (123) cut the front end of the extrusion portion (12) into a plurality of rectangular extrusion areas (124); the top surface and the bottom surface of the rear side of the extrusion portion (124) are respectively provided with a feed trough (125) along the width direction; the first extrusion channel (3), the feed trough (125), the vertical discharge trough (123), and the second extrusion channel (5) are connected; the connecting portion (11) is provided with three air holes (111) penetrating the left and right sides thereof; the three air holes (111) each extend forward a series of air hole channels (112) along the width direction; and the front end of each air hole channel (112) penetrates into a corresponding rectangular extrusion area (124).

2. The core structure of a two-color or three-color hollow grid plate extrusion die according to claim 1, characterized in that: The left and right ends of the first transverse discharge chute (121) and the second transverse discharge chute (122) are both provided with guide bars (126) arranged front and back to guide the flow of the raw materials.

3. The core structure of a two-color or three-color hollow grid plate extrusion die according to claim 1, characterized in that: The rear side surface of the connection portion (11) is provided with two upper and lower rows of threaded connection holes (113), and screws pass through the threaded connection holes (113) to fix the mold core body (1) to the mold head.

4. The core structure of a two-color or three-color hollow grid plate extrusion die according to claim 1, characterized in that: The connecting portion (11) and the extrusion portion are both inclined surfaces that are larger at the rear and smaller at the front, and the taper of the inclined surface of the extrusion portion (12) is smaller than the taper of the inclined surface of the connecting portion (11).

5. The core structure of a two-color or three-color hollow grid plate extrusion die according to claim 1, characterized in that: A first feed channel (114) connected to the first transverse discharge groove (121) and a second feed channel (115) connected to the second transverse discharge groove (122) are respectively arranged at upper and lower positions in the connection portion (11).

Images