Double-layer co-extrusion machine head die

Abstract

The utility model relates to the technical field of extrusion dies, in particular to a double-layer co-extrusion machine head die which comprises a double-layer co-extrusion machine head, the double-layer co-extrusion machine head comprises a flow divider, a threading pipe and a die core, and four limiting grooves are formed in the side wall of the die core; by arranging the limiting grooves, the limiting blocks, the clamping holes, the installation holes, the reset springs and the clamping blocks, when the mold core needs to be installed in the double-layer co-extrusion machine head, the four limiting grooves are aligned with the four limiting blocks and then inserted into the threading pipe, and when one ends of the four limiting blocks abut against the inner walls of the four limiting grooves respectively, the threading pipe is inserted into the threading pipe; after the reset springs on the four clamping blocks are not subjected to the pressure transmitted by the clamping blocks any more, the four clamping blocks are pushed into the four clamping holes respectively to complete locking of the mold core, locking installation of the mold core in the double-layer co-extrusion machine head is achieved, and due to the fact that the clamping blocks are inserted into the clamping holes to complete locking of the mold core, the mold core can be locked conveniently. Even if the side wall of the die core is damaged, the stability of installation and connection of the die core in the double-layer co-extrusion machine head cannot be reduced, and the die core is more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of extrusion dies, in particular to a double-layer co-extrusion head die. Background Technique

[0002] The double-layer co-extrusion head is a device for producing double-layer films. Its working principle is to melt two different plastics through an extruder and then extrude them simultaneously according to a predetermined ratio and pressure to form a double-layer film.

[0003] After retrieval, the publication number: CN207149320U discloses a double-layer co-extrusion die for an extruder, which solves the problem that the mold must be installed by pulling out the threading pipe during mold installation, making the mold installation operation simple, thus shortening the time for the operator to install the mold. The above-mentioned prior art fixes the mold core in the double-layer co-extrusion head by taper fit connection. However, when the taper connection surface of the mold core wears or deforms, the reliability of the taper fit connection will drop significantly, and the fitting connection method of the mold core in the double-layer co-extrusion head is not reliable enough.

[0004] In order to solve the above problems, the utility model provides a double-layer co-extrusion head die. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a double-layer co-extrusion head die to solve the technical problem in the prior art that "the above-mentioned prior art fixes the mold core in the mold core seat by taper fit connection to achieve fixed installation in the double-layer co-extrusion head. However, when the taper connection surface of the mold core wears or deforms, the reliability of the taper fit connection will drop significantly, and the fitting connection method of the mold core in the double-layer co-extrusion head is not reliable enough".

[0006] To achieve the above object, the utility model is realized through the following technical solutions:

[0007] A double-layer co-extrusion head die includes a double-layer co-extrusion head. The double-layer co-extrusion head includes a diverter, a threading pipe, and a mold core. Four limiting grooves are opened on the side wall of the mold core. Four limiting blocks are fixedly connected to the inner wall of the threading pipe. Card holes are opened on all four limiting grooves. Four installation holes are opened on the side wall of the diverter. Four first holes matching the installation holes are opened on the side wall of the threading pipe. Second holes corresponding to the first holes are opened on the side walls of all four limiting blocks. Return springs are fixedly connected to all four installation holes. The lower ends of all four return springs are fixedly connected with clamping blocks. Connecting rods are fixedly connected to the upper end surfaces of all four clamping blocks.

[0008] As a preferred technical solution of the utility model, the upper ends of all four connecting rods are fixedly connected with pulling plates, and all four pulling plates are disc plates.

[0009] As a preferred technical solution of the present utility model, the side walls of the four clamping blocks are respectively slidably connected to the inner walls of the four clamping holes, mounting holes, first holes, and second holes.

[0010] As a preferred technical solution of the present utility model, the four limiting blocks are respectively slidably connected to the inner walls of the four limiting grooves, and the cross-sectional dimensions of the four limiting blocks respectively match the cross-sectional dimensions of the four limiting grooves.

[0011] As a preferred technical solution of the present utility model, a plurality of anti-leakage sealing rings are arranged between the threading pipe and the die core.

[0012] As a preferred technical solution of the present utility model, the threading pipe is arranged inside the diverter, and the die core is arranged at one end of the threading pipe.

[0013] The present utility model provides a double-layer co-extrusion head mold, which has the following beneficial effects:

[0014] 1. By arranging the limiting grooves, limiting blocks, clamping holes, mounting holes, return springs, and clamping blocks, when the die core needs to be installed into the double-layer co-extrusion head, after aligning the four limiting grooves with the four limiting blocks and inserting them into the threading pipe, when the ends of the four limiting blocks respectively abut against the inner walls of the four limiting grooves, the return springs on the four clamping blocks no longer receive the pressure transmitted by the clamping blocks, and then the four clamping blocks are respectively pushed into the four clamping holes to complete the locking of the die core, realizing the locked installation of the die core in the double-layer co-extrusion head. Since the clamping blocks are inserted into the clamping holes to complete the locking of the die core, even if the side wall of the die core is damaged, it will not reduce the stability of the installation and connection of the die core in the double-layer co-extrusion head, which is more reliable;

[0015] 2. By arranging the pull plates, when it is necessary to extract the die core from the double-layer co-extrusion head, the four pull plates are simultaneously lifted upwards. The clamping blocks fixedly connected to the lower ends of the four pull plates will simultaneously be withdrawn from the four clamping holes and return to the first holes. At this time, the die core can be extracted from the double-layer co-extrusion head and replaced under the cooperation of the four limiting blocks and the limiting grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of a double-layer co-extrusion head mold proposed by the present utility model;

[0017] Figure 2 is a front structural sectional view of a double-layer co-extrusion head mold proposed by the present utility model;

[0018] Figure 3 is Figure 2 an enlarged structural schematic diagram at A in

[0019] In the figure: 1 shunt, 2 threading pipe, 3 die core, 4 limit slot, 5 limit block, 6 clamping hole, 7 mounting hole, 8 return spring, 9 connecting rod, 10 clamping block. Detailed implementation mode

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0021] Therefore, a feature pointed out in this specification will be used to illustrate one feature of one embodiment of the present utility model, rather than implying that each embodiment of the present utility model must have the illustrated feature. In addition, it should be noted that this specification describes many features. Although some features can be combined to show possible system designs, these features can also be used in other combinations not explicitly described. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0022] The principle and structure of the present utility model will be described in detail below with reference to the accompanying drawings and embodiments:

[0023] Refer to Figures 1-3 , a double-layer co-extrusion head die, including a double-layer co-extrusion head, the double-layer co-extrusion head includes a shunt 1, a threading pipe 2, a die core 3, four limit slots 4 are opened on the side wall of the die core 3, four limit blocks 5 are fixedly connected to the inner wall of the threading pipe 2, clamping holes 6 are opened on all four limit slots 4, mounting holes 7 are opened on the side wall of the shunt 1, four first holes matching the mounting holes 7 are opened on the side wall of the threading pipe 2, second holes corresponding to the first holes are opened on the side walls of all four limit blocks 5, return springs 8 are fixedly connected to all four mounting holes 7, clamping blocks 10 are fixedly connected to the lower ends of all four return springs 8, and connecting rods 9 are fixedly connected to the upper end faces of all four clamping blocks 10.

[0024] When it is necessary to install the die core 3 in the double-layer co-extrusion head, align the four limit slots 4 on the side wall of the die core 3 with the four limit blocks 5 on the inner wall of the threading pipe 2, so that the side wall of the die core 3 can slide inward along the inner wall of the threading pipe 2. After the four limit blocks 5 slide along the inner walls of the four limit slots 4 and slide against the inner walls of the limit slots 4 respectively, at this time, the clamping holes 6, the mounting holes 7, the first holes and the second holes correspond to each other in the vertical direction, and the four clamping blocks 10 will be respectively pushed into the four clamping holes 6 under the action of the return springs 8 to complete the locking of the die core 3 in the double-layer co-extrusion head, realizing the locking installation of the die core 3 in the double-layer co-extrusion head. Even if the side wall of the die core 3 is damaged, it will not reduce the stability of the installation and connection of the die core 3 in the double-layer co-extrusion head, which is more reliable;

[0025] Further, pull plates are fixedly connected to the upper ends of the four connecting rods 9, and the four pull plates are all disc plates.

[0026] By providing the pull plates, when it is necessary to extract the mold core 3 from the double-layer co-extrusion head, the four pull plates are lifted upward simultaneously. The clamping blocks 10 fixedly connected to the lower ends of the four pull plates will simultaneously be withdrawn from the four clamping holes 6 and return to the first hole. At this time, the mold core 3 can be extracted from the double-layer co-extrusion head and replaced under the cooperation of the four limiting blocks 5 and the limiting grooves 4;

[0027] Further, the side walls of the four clamping blocks 10 are respectively in sliding connection with the inner walls of the four clamping holes 6, the mounting holes 7, the first hole, and the second hole.

[0028] By making the side walls of the four clamping blocks 10 be respectively in sliding connection with the inner walls of the four clamping holes 6, the mounting holes 7, the first hole, and the second hole, the four clamping blocks 10 can slide respectively along the inner walls of the four clamping holes 6, the mounting holes 7, the first hole, and the second hole;

[0029] Further, the four limiting blocks 5 are respectively in sliding connection with the inner walls of the four limiting grooves 4, and the cross-sectional dimensions of the four limiting blocks 5 respectively match the cross-sectional dimensions of the four limiting grooves 4.

[0030] By making the four limiting blocks 5 be respectively in sliding connection with the inner walls of the four limiting grooves 4, the four limiting blocks 5 can slide respectively along the inner walls of the four limiting grooves 4;

[0031] Further, a plurality of anti-leakage sealing rings are provided between the wire conduit 2 and the mold core 3.

[0032] By providing a plurality of anti-leakage sealing rings, the plurality of anti-leakage sealing rings can ensure that there is no leakage in the gap between the wire conduit 2 and the mold core 3, improving the anti-leakage ability of the double-layer co-extrusion head;

[0033] Further, the wire conduit 2 is arranged inside the diverter 1, and the mold core 3 is arranged at one end of the wire conduit 2;

[0034] Further, the diverter 1 and the wire conduit 2 have been fully disclosed in the publication number: CN207149320U, and will not be elaborated here.

[0035] The working principle of the utility model is as follows: when the mold core 3 needs to be installed in the double-layer co-extrusion head, the four limiting grooves 4 on the side wall of the mold core 3 are aligned with the four limiting blocks 5 on the inner wall of the threading tube 2, so that the side wall of the mold core 3 can slide inward along the inner wall of the threading tube 2, and after the four limiting blocks 5 respectively slide along the inner walls of the four limiting grooves 4 and slide onto the inner walls of the limiting grooves 4, the clamping hole 6, the installation hole 7, the No. 1 hole, and the No. 2 hole correspond to each other in the vertical direction, and the four clamping blocks 10 will be pushed into the four clamping holes 6 under the action of the reset spring 8 respectively and complete the locking of the mold core 3 in the double-layer co-extrusion head, thereby realizing the locking installation of the mold core 3 in the double-layer co-extrusion head. Even if the side wall of the mold core 3 is damaged, the stability of the installation connection of the mold core 3 in the double-layer co-extrusion head will not be reduced, which is more reliable;

[0036] Compared with the prior art, by setting limit grooves 4, limit blocks 5, clamping holes 6, mounting holes 7, reset springs 8 and clamping blocks 10, when the core 3 needs to be installed in the double-layer co-extrusion head, the four limit grooves 4 are aligned with the four limit blocks 5 and then inserted into the threading tube 2. When one end of the four limit blocks 5 respectively rests on the inner walls of the four limit grooves 4, the reset springs 8 on the four clamping blocks 10 are no longer subjected to the pressure transmitted by the clamping blocks 10, and the four clamping blocks 10 are respectively pushed into the four clamping holes 6 to complete the locking of the core 3, thereby realizing the locking and installation of the core 3 in the double-layer co-extrusion head. Since the clamping blocks 10 are inserted into the clamping holes 6 to complete the locking of the core 3, even if the side walls of the core 3 are damaged, the stability of the installation and connection of the core 3 in the double-layer co-extrusion head will not be reduced, which is more reliable.

[0037] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A double-layer co-extrusion head die, including a double-layer co-extrusion head, characterized in that, The double-layer co-extrusion head includes a diverter (1), a threading pipe (2), and a die core (3). Four limiting grooves (4) are formed on the side wall of the die core (3). Four limiting blocks (5) are fixedly connected to the inner wall of the threading pipe (2). Card holes (6) are formed in all four of the limiting grooves (4). Four mounting holes (7) are formed in the side wall of the diverter (1). Four first holes matching the mounting holes (7) are formed in the side wall of the threading pipe (2). Second holes corresponding to the first holes are formed in the side walls of all four of the limiting blocks (5). Return springs (8) are fixedly connected in all four of the mounting holes (7). Blocks (10) are fixedly connected to the lower ends of all four of the return springs (8). Connecting rods (9) are fixedly connected to the upper end faces of all four of the blocks (10).

2. The double-layer co-extrusion head die according to claim 1, characterized in that, Pulling plates are fixedly connected to the upper ends of all four of the connecting rods (9). All four of the pulling plates are disc plates.

3. A double-layer co-extrusion head die according to claim 1, characterized in that The side walls of all four of the blocks (10) are slidably connected to the inner walls of the four card holes (6), mounting holes (7), first holes, and second holes respectively.

4. A double-layer co-extrusion head die according to claim 1, characterized in that, All four of the limiting blocks (5) are slidably connected to the inner walls of the four limiting grooves (4). The cross-sectional dimensions of all four of the limiting blocks (5) match the cross-sectional dimensions of the four limiting grooves (4) respectively.

5. The double-layer co-extrusion head die according to claim 1, characterized in that, A plurality of anti-leakage sealing rings are provided between the threading pipe (2) and the die core (3).

6. The double-layer co-extrusion head die according to claim 1, wherein, The threading pipe (2) is arranged inside the diverter (1), and the die core (3) is arranged at one end of the threading pipe (2).

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