Outer cover extrusion adjustment-free fine adjustment machine head

Abstract

The utility model relates to the technical field of adjustment-free machine heads, in particular to an outer sheath extrusion adjustment-free fine adjustment machine head which comprises a main body, and a mouth mold and a core rod are sequentially arranged on the inner side of the main body. Wherein an inner mold is arranged on the inner side of the core rod, a connecting structure is arranged on the front side of the main body, and the connecting structure is used for installing the core rod in the main body; the machine head structure is improved, the die sleeve is arranged on the side edge, so that an outer die heating ring does not need to be installed for heating, the eccentricity of the outer die can be adjusted directly through a wrench, and the outer die assembly is arranged on the outer side of the inner die. And secondly, the adjustment-free design can ensure that the rubber scrap generated by a wire rod machine table can be reduced by half, and the overall structural design is simple and novel by reducing the transfer time of the machine table, so that the extrusion quality of the cable jacket is improved, and the applicability of the existing adjustment-free mechanism is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of head without adjustment, in particular to an outer sheath extrusion head without adjustment with fine adjustment. Background Art

[0002] The head is a key component of a cable extruder. The existing heads can be divided into adjustable heads and heads without adjustment. Compared with the traditional adjustable heads, the heads without adjustment have the characteristics of stable concentricity, simple operation, and convenient threading. Since the principle of the head without adjustment is centering type, the inner and outer dies are fixed to make them non-eccentric, and the eccentricity adjustment of the head is avoided to a certain extent.

[0003] At present, the heads without adjustment are widely used in the production of PVC and NHFR materials by outer sheath extruders. The eccentricity of the head can be adjusted with a wrench. In the current structure of the head without adjustment, due to the influence of the heating die outside the main body on the adjustment position, during the adjustment stage, the outer die heating coil needs to be pre-installed for heating up. However, this adjustment method has low efficiency and is not conducive to enterprises to improve production efficiency. Based on this, we propose an outer sheath extrusion head without adjustment with fine adjustment. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages in the prior art, such as the need to pre-install an outer die heating coil for heating up and low efficiency, and to propose an outer sheath extrusion head without adjustment with fine adjustment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] Design an outer sheath extrusion head without adjustment with fine adjustment, including a main body, and a die and a mandrel are sequentially arranged inside the main body;

[0007] Wherein, an inner die is arranged inside the mandrel, and a connection structure is arranged on the front side of the main body, and the connection structure is used to install the mandrel in the main body;

[0008] An outer die assembly is further arranged on the rear side of the main body, and the outer die assembly is arranged outside the inner die.

[0009] Further, the connection structure includes a front baffle fixed on the mandrel, a clamping groove is further arranged on the outer peripheral surface of the mandrel, a ring clamping member is clamped in the clamping groove, and the ring clamping member stops outside the front baffle.

[0010] Further, an installation groove is opened at the front end of the main body, the front baffle has a connection part, and the connection part is threadedly connected in the installation groove.

[0011] Further, the outer mold assembly includes a rear baffle and a mold sleeve disposed in the rear baffle. An outer mold and a positioning member are sequentially installed inside the mold sleeve, and the positioning member stops at one side of the outer mold.

[0012] Further, a runner is formed between the outer mold and the inner mold. An injection port is provided at the top of the main body. A runner groove is provided outside the die orifice, and both ends of the runner groove communicate with the runner and the injection port respectively.

[0013] Further, four adjusting bolts are threadedly connected to the outside of the rear baffle, and the ends of the four adjusting bolts abut against the outside of the mold sleeve. Among them, the cross-section of the rear baffle is an L-shaped structure, and the tail end of the mold sleeve has a ring convex that is snap-fitted in the rear baffle.

[0014] Further, an outwardly expanding cavity is provided inside the mandrel, and an inwardly contracting surface adapted to the outwardly expanding cavity is provided on the outer peripheral surface of the inner mold.

[0015] The beneficial effects of an outer jacket extrusion non-adjustable head with fine adjustment proposed by the present utility model are as follows: Through the improvement of the head structure in the present utility model, since the mold sleeve is arranged on the side, it is not necessary to install an outer mold heating ring for heating, and the eccentricity of the outer mold can be directly adjusted with a wrench. Secondly, the non-adjustable design can ensure that the waste of the rubber material generated by the wire machine can be reduced by half, and by reducing the machine turning time, the overall structure design is simple and novel, improving the extrusion quality of the cable outer jacket and optimizing the applicability of the existing non-adjustable mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present utility model.

[0017] In the figure: 1, main body; 2, die orifice; 3, mandrel; 4, inner mold; 5, front baffle; 6, ring clamping member; 7, rear baffle; 8, mold sleeve; 9, outer mold; 10, runner; 11, injection port; 12, runner groove; 13, adjusting bolt; 14, outwardly expanding cavity; 15, positioning member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0019] Referring to Figure 1 is an embodiment of the present utility model, which discloses an outer jacket extrusion non-adjustable head with fine adjustment. The non-adjustable mechanism includes a main body 1, and a die orifice 2 and a mandrel 3 are sequentially arranged inside the main body 1;

[0020] An inner mold 4 is provided inside the core rod 3, and a connecting structure is provided on the front side of the main body 1, and the connecting structure is used to install the core rod 3 in the main body 1;

[0021] An outer mold component is also arranged on the rear side of the main body 1 , and the outer mold component is arranged on the outer side of the inner mold 4 .

[0022] In some embodiments, the connection structure described in the utility model includes a front baffle plate 5 fixed on the core rod 3, and a clamping groove is also provided on the outer peripheral surface of the core rod 3, and a ring clamp 6 is clamped in the clamping groove, and the ring clamp 6 is stopped on the outer side of the front baffle plate 5. Preferably, the ring clamp 6 described in this embodiment can use a retaining spring as the stop part. Of course, the front baffle plate 5 can be connected to the core rod 3 by fasteners such as bolts.

[0023] On the basis of the above-mentioned embodiment, a mounting groove is provided at the front end of the main body 1 in this embodiment, and the front baffle 5 has a connecting portion, which is threadedly connected in the mounting groove, that is, a threaded connection fixing method is adopted in this embodiment to realize the mutual connection between the two, so as to improve the convenience of assembly and disassembly.

[0024] Further, the outer mold assembly in this embodiment includes a rear baffle 7 and a mold sleeve 8 arranged in the rear baffle 7, and the inner side of the mold sleeve 8 is successively installed with an outer mold 9 and a positioning member 15, and the positioning member 15 is stopped on one side of the outer mold 9. In a preferred embodiment, the positioning member 15 in the utility model is an annular member, and is clamped on the inner side of the mold sleeve 8. Of course, a detachable connection method can also be provided, such as a threaded connection, etc. In addition, the outer mold 9 in this embodiment is threadedly connected to the inner side of the mold sleeve 8, and a stop surface is provided on the inner side surface of the positioning member 15, and the mold sleeve 8 is in contact with the stop surface to complete the positioning installation.

[0025] In addition, in this embodiment, a flow channel 10 is formed between the outer mold 9 and the inner mold 4, an injection port 11 is provided on the top of the main body 1, and a flow channel groove 12 is provided on the outer side of the mouth mold 2, and the two ends of the flow channel groove 12 are respectively connected to the flow channel 10 and the injection port 11. During injection molding, the core wire of the cable is passed through the inner side of the core rod 3, the mold sleeve 8 and the outer mold 9 and passed outward along the positioning piece 15, and the rubber is introduced into the injection port 11, and the rubber flows into the flow channel 10 along the flow channel groove 12 to complete the injection molding operation of the cable.

[0026] In some embodiments, four adjusting bolts 13 are threadedly connected to the outer side of the rear baffle 7 in the present utility model. The ends of the four adjusting bolts 13 abut against the outer side of the die sleeve 8. Specifically, in this embodiment, the die sleeve 8 can move inside the rear baffle 7 to achieve a fine-tuning function. Among them, the cross-section of the rear baffle 7 is in an L-shaped structure, and the tail end of the die sleeve 8 has a ring protrusion clamped in the rear baffle 7. Specifically, in this embodiment, by adopting the design of four adjusting bolts 13, it is used to adjust the die sleeve 8 in four directions to achieve fine-tuning of the outer die 9 and ensure the concentricity of the injection-molded outer sheath.

[0027] Certainly, in order to achieve the convenient installation of the inner die 4, an outwardly expanding cavity 14 is provided inside the mandrel 3 in this embodiment, and a inwardly contracting surface adapted to the outwardly expanding cavity 14 is provided on the outer peripheral surface of the inner die 4. By adopting the design method of the outwardly expanding cavity 14 and the inwardly contracting surface, concentric installation can be achieved to achieve the function of avoiding adjustment.

[0028] In summary, in the present utility model, through the improvement of the head structure, since the die sleeve 8 is arranged on the side, there is no need to install an outer die heating ring for heating, and the eccentricity of the outer die 9 can be directly adjusted with a wrench. Secondly, the design of avoiding adjustment can ensure that the waste of the rubber material generated by the wire machine can be reduced by half, and by reducing the machine cycle time, the overall structural design is simple and novel, improving the extrusion quality of the cable outer sheath, and optimizing the applicability of the existing adjustment-free mechanism.

[0029] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. An external extrusion non-adjustable belt fine-tuning machine head, comprising a main body (1), characterized in that: A die (2) and a core rod (3) are sequentially arranged on the inner side of the main body (1); An inner mold (4) is provided on the inner side of the core rod (3), and a connecting structure is provided on the front side of the main body (1), wherein the connecting structure is used to install the core rod (3) in the main body (1); An outer mold component is also provided on the rear side of the main body (1), and the outer mold component is provided on the outer side of the inner mold (4); the connection structure comprises a front baffle plate (5) fixed on the core rod (3), and a clamping groove is also provided on the outer peripheral surface of the core rod (3), and a ring clamping member (6) is clamped in the clamping groove, and the ring clamping member (6) is stopped on the outer side of the front baffle plate (5).

2. The outer jacket extrusion free-adjustment belt fine-adjustment machine head according to claim 1, characterized in that: The front end of the main body (1) is provided with a mounting groove, and the front baffle (5) has a connecting portion, which is threadedly connected in the mounting groove.

3. The outer jacket extrusion free-adjustment belt fine-adjustment machine head according to claim 1, characterized in that: The outer mold assembly comprises a rear baffle (7) and a mold sleeve (8) arranged in the rear baffle (7), the inner side of the mold sleeve (8) being successively mounted with an outer mold (9) and a positioning member (15), the positioning member (15) being stopped on one side of the outer mold (9).

4. The outer jacket extrusion free-adjustment belt fine-adjustment machine head according to claim 3, characterized in that: A flow channel (10) is formed between the outer mold (9) and the inner mold (4), an injection port (11) is provided at the top of the main body (1), a flow channel groove (12) is provided on the outer side of the die (2), and two ends of the flow channel groove (12) are respectively connected to the flow channel (10) and the injection port (11).

5. The outer jacket extrusion free-adjustment belt fine-adjustment machine head according to claim 3, characterized in that: Four adjusting bolts (13) are threadedly connected to the outer side of the rear baffle (7), and the ends of the four adjusting bolts (13) abut against the outer side of the mold sleeve (8), wherein the cross section of the rear baffle (7) is an L-shaped structure, and the rear end of the mold sleeve (8) has an annular protrusion that is clamped in the rear baffle (7).

6. The outer jacket extrusion free-adjustment belt fine-adjustment machine head according to claim 1, characterized in that: An outer expansion cavity (14) is provided on the inner side of the core rod (3), and an inner shrinkage surface matching the outer expansion cavity (14) is provided on the outer peripheral surface of the inner mold (4).

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