Screw head assembly for injection molding machine

Abstract

The utility model relates to the technical field of injection molding machine assembly parts, in particular to a screw head assembly for an injection molding machine, which comprises a screw head and a screw head dismounting part, the screw head comprises a screw head part, a middle connecting part, a limiting part and a tailstock connecting part which are integrally formed and sequentially connected, and an annular part which is arranged on the outer surface of the middle connecting part in a sleeving manner and clamped between the conical head part and the limiting part, and first grooves are formed in the side, close to the middle connecting part, of the screw head part in parallel at intervals; the tailstock connecting part is connected with the discharging pipe, the annular part and the middle connecting part form a cavity allowing injection molding materials to flow in, and the injection molding materials are transmitted to the nozzle through the first groove; the screw head disassembling piece comprises an annular disassembling piece body, and the annular disassembling piece body is hollow and provided with a cavity clamped with the first groove. In the daily maintenance and troubleshooting process of the injection molding machine, on one hand, the assembling and disassembling efficiency of the screw head can be improved, and on the other hand, the safety can be enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine assembly technical field especially is injection molding machine screw head subassembly. BACKGROUND

[0002] Injection molding machine is a kind of precision mechanical equipment for producing various plastic products, it is cooled solidification by being injected into mold after heating and melting plastic material, to form the plastic product required, the screw head of injection molding machine is the key part of injection unit, it is responsible for the molten plastic material transmission to nozzle via discharge pipe;Screw head is usually made of high-temperature-resistant, wear-resistant material to ensure long-term stable operation and prolong service life.

[0003] When existing screw head is installed to the discharge pipe of injection molding machine, it is usually handled using the cooperation of several disassembling pieces, and the disassembling mode is relatively complex. Therefore, it is crucial to provide a screw head subassembly capable of solving the above technical problems. SUMMARY

[0004] In order to solve the above problems, the purpose of the utility model is to provide a screw head subassembly for injection molding machine.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] The utility model provides a screw head subassembly for injection molding machine, when using, it is arranged between nozzle and discharge pipe, including screw head and screw head disassembling piece;

[0007] The screw head includes integrally formed and sequentially connected screw head part, intermediate connecting part, limiting part, tail seat connecting part, and annular part sleeved on the outer surface of intermediate connecting part and clamped between conical head part and limiting part, the side of screw head part close to intermediate connecting part is provided with first recess in parallel and interval, and first protrusion is formed between adjacent first recess;

[0008] The tail seat connecting part is connected with discharge pipe, the annular part and intermediate connecting part form cavity allowing material (such as injection plastic) to flow in, and are transmitted to nozzle via first recess;The screw head disassembling piece includes annular disassembling piece main body, the annular disassembling piece main body is hollow inside, and has the first recess and the first protrusion cavity of clamping type.

[0009] In an embodiment of the utility model, the central axes of screw head part, intermediate connecting part, limiting part and tail seat connecting part are same.

[0010] In an embodiment of the utility model, the limiting part is in the shape of a circular truncated cone, the outer diameter of the side close to the screw head part is less than the outer diameter of the side away from the screw head part;The maximum outer diameter of the limiting part is same with the outer diameter of discharge pipe.

[0011] In one embodiment of the utility model, the inner diameter of the annular part is less than the maximum outer diameter of the limiting part and the maximum outer diameter of the screw head, and is greater than the outer diameter of the first groove.

[0012] In one embodiment of the utility model, the outer diameter of the annular part is greater than the maximum outer diameter of the limiting part and the maximum outer diameter of the screw head.

[0013] In one embodiment of the utility model, the outer surface of the tail seat connecting part is provided with external threads for movably connecting with the discharge pipe.

[0014] In one embodiment of the utility model, one end of the annular dismounting part main body along its length direction is provided with a square limiting part with hollow inside, and the square limiting part is extended from the inner cavity of the annular dismounting part main body to the outside of the annular dismounting part main body (allowing to be connected with other dismounting parts).

[0015] In one embodiment of the utility model, the inner cavity of the annular dismounting part main body forms a second protrusion matched with the first groove, and a second groove matched with the first protrusion.

[0016] In one embodiment of the utility model, the central axis of the square limiting part is the same as the central axis of the annular dismounting part main body.

[0017] In one embodiment of the utility model, the screw head comprises an integrally formed conical section and a cylindrical section.

[0018] The cylindrical section is connected with the intermediate connecting part, and the outer diameter of the conical section away from the intermediate connecting part is less than the outer diameter of the side close to the intermediate connecting part.

[0019] The length of the first groove is greater than the length of the cylindrical section.

[0020] In one embodiment of the utility model, the end of the conical section connected with the cylindrical section is the same as the outer diameter of the cylindrical section.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The cooperation of the screw head and the screw head dismounting part in the screw head assembly for injection molding machine can easily realize the assembly and disassembly of the screw head and the discharge pipe; during the daily maintenance and fault elimination of the injection molding machine, on the one hand, the efficiency of the screw head assembly and disassembly can be improved, the maintenance efficiency is improved, on the other hand, the safety can be enhanced, and the service life of the equipment is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1It is a structure schematic view of a screw head assembly for an injection molding machine (screw head and screw head disassembling piece are assembled);

[0024] Fig. 2 It is a structure schematic view of a screw head assembly for an injection molding machine (screw head and screw head disassembling piece are not assembled);

[0025] Fig. 3 It is a side view of a screw head in a screw head assembly for an injection molding machine (without annular part);

[0026] Fig. 4 It is a side view of a screw head in a screw head assembly for an injection molding machine (with annular part);

[0027] Fig. 5 It is a sectional view of a screw head in a screw head assembly for an injection molding machine (with annular part);

[0028] Fig. 6 It is a front view of a screw head disassembling piece in a screw head assembly for an injection molding machine (screw head direction);

[0029] In the figure, 1 is a screw head, 2 is a screw head disassembling piece, 11 is a screw head part, 12 is an intermediate connecting part, 13 is a limiting part, 14 is a tail seat connecting part, 15 is an annular part, 16 is a first recess, 17 is a first protrusion, 21 is an annular disassembling piece main body, 22 is a square limiting piece, 23 is a second recess, and 24 is a second protrusion. DETAILED DESCRIPTION

[0030] The utility model will be described in detail below in combination with the drawings and specific embodiments.

[0031] In the description of the utility model, unless another explicit provision and limitation, the terms "connection", "connecting", "fixing" should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or be integrated, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] In the following embodiments, unless otherwise specified, all structures or components are conventional structures or components in the art, as long as they can achieve the corresponding functions.

[0035] Example 1

[0036] This embodiment provides a screw head assembly for an injection molding machine, such as... Figs. 1-6 As shown, in use, it is positioned between the nozzle and the discharge pipe, including a screw head 1 and a screw head disassembly component 2; the screw head 1 includes an integrally formed screw head 11, an intermediate connecting part 12, a limiting part 13, a tailstock connecting part 14 connected in sequence, and an annular part 15 sleeved on the outer surface of the intermediate connecting part 12 and engaged between the conical head and the limiting part 13. The screw head 11 has parallel and spaced first grooves 16 on the side near the intermediate connecting part 12, and a first protrusion 17 is formed between adjacent first grooves 16; the tailstock connecting part 14 is connected to the discharge pipe, and the annular part 15 and the intermediate connecting part 12 form a cavity that allows the injection plastic to flow in, and transmits it to the nozzle via the first grooves 16; the screw head disassembly component 2 includes an annular disassembly component body 21, the annular disassembly component body 21 is hollow inside, and has a cavity in which the first grooves 16 and the first protrusions 17 engage.

[0037] Furthermore, the central axes of the screw head 11, intermediate connecting part 12, limiting part 13 and tailstock connecting part 14 are the same;

[0038] Further, the limiting part 13 is in the shape of a circular truncated cone, the outer diameter of the side close to the screw head 11 is smaller than that of the side far from the screw head 11; the maximum outer diameter of the limiting part 13 is the same as the outer diameter of the discharge pipe;

[0039] Further, the inner diameter of the annular part 15 is smaller than the maximum outer diameter of the limiting part 13, and smaller than the maximum outer diameter of the screw head 11, and larger than the outer diameter of the first groove 16;

[0040] Further, the outer diameter of the annular part 15 is larger than the maximum outer diameter of the limiting part 13, and larger than the maximum outer diameter of the screw head 11; the length of the annular part 15 is smaller than the length of the intermediate connecting part 12.

[0041] Further, the outer surface of the tail seat connecting part 14 is provided with external threads for active connection with the discharge pipe.

[0042] Further, one end of the annular dismounting member main body 21 along its length direction is provided with an internally hollow square limiting part 22, the square limiting part 22 is extended from the inner cavity of the annular dismounting member main body 21 to the outside of the annular dismounting member main body 21 (allowing connection with other dismounting members such as wrenches).

[0043] Further, the inner cavity of the annular dismounting member main body 21 forms a second protrusion 24 matched with the first groove 16, and a second groove 23 matched with the first protrusion 17;

[0044] Further, the central axis of the square limiting part 22 is the same as that of the annular dismounting member main body 21.

[0045] Further, the screw head 11 comprises an integrally formed conical section and a cylindrical section; the cylindrical section is connected with the intermediate connecting part 12, the outer diameter of the side of the conical section far from the intermediate connecting part 12 is smaller than that of the side close to the intermediate connecting part 12; the length of the first groove 16 is larger than that of the cylindrical section.

[0046] Further, the end of the conical section connected with the cylindrical section has the same outer diameter as that of the cylindrical section; the conical section is arranged towards the nozzle.

[0047] During assembly, the side of the annular dismounting member main body 21 far from the square limiting part 22 is sleeved on the outside of the screw head 11 (the first groove 16 is engaged with the second protrusion 24, and the first protrusion 17 is engaged with the second groove 23), the tail seat connecting part 14 is placed at the end of the discharge pipe, an external wrench is engaged with the square limiting part 22, the tail seat connecting part 14 is screwed with the discharge pipe by rotating, until the limiting part 13 is in close contact with the end of the discharge pipe;

[0048] In use, the material in the injection molding machine is melted and transported to the screw head 1 through the discharge pipe. Specifically, the material enters the cavity formed by the annular part 15 and the intermediate connecting part 12, and is transported to the nozzle cavity through the first groove 16.

[0049] In disassembly, the external wrench is connected with the square limiting part 22, and is rotated in the opposite direction to the assembly direction until the tail seat connecting part 14 is separated from the discharge pipe.

[0050] The above description of the embodiments is for the convenience of the ordinary skilled in the art to understand and use the utility model. Those skilled in the art can obviously easily make various modifications to these embodiments, and apply the general principles described herein to other embodiments without creative labor. Therefore, the utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art according to the interpretation of the utility model should be within the protection scope of the utility model.

Claims

1. A screw tip assembly for an injection molding machine, disposed between a nozzle and a discharge tube when in use, characterized in that, The screw head (1) and the screw head dismounting piece (2) are included. The screw head (1) includes a screw head part (11), an intermediate connecting part (12), a limiting part (13), a tail seat connecting part (14), and a ring part (15) sleeved on the outer surface of the intermediate connecting part (12) and clamped between the conical head and the limiting part (13), and first grooves (16) are arranged in parallel and at intervals on the side of the screw head part (11) close to the intermediate connecting part (12), and first protrusions (17) are formed between adjacent first grooves (16). The tail seat connecting part (14) is connected with a discharge pipe, the ring part (15) and the intermediate connecting part (12) form a cavity allowing material to flow in, and is transmitted to a nozzle through the first grooves (16). The screw head dismounting piece (2) includes a ring-shaped dismounting piece body (21), the inside of the ring-shaped dismounting piece body (21) is hollow, and has a cavity in which the first grooves (16) and the first protrusions (17) are clamped.

2. A screw tip assembly for an injection molding machine as defined in claim 1, wherein, The central axes of the screw head part (11), the intermediate connecting part (12), the limiting part (13), and the tail seat connecting part (14) are the same.

3. A screw tip assembly for an injection molding machine as defined in claim 1, wherein The limiting part (13) is in the shape of a circular truncated cone, the outer diameter of the side close to the screw head part (11) is smaller than the outer diameter of the side away from the screw head part (11), and the maximum outer diameter of the limiting part (13) is the same as the outer diameter of the discharge pipe.

4. A screw tip assembly for an injection molding machine as defined in claim 3, wherein The inner diameter of the ring part (15) is smaller than the maximum outer diameter of the limiting part (13) and the maximum outer diameter of the screw head part (11), and is greater than the outer diameter of the first grooves (16).

5. A screw tip assembly for an injection molding machine as defined in claim 3, wherein, The outer diameter of the ring part (15) is greater than the maximum outer diameter of the limiting part (13) and the maximum outer diameter of the screw head part (11).

6. A screw tip assembly for an injection molding machine as defined in claim 1, wherein, An outer thread is arranged on the outer surface of the tail seat connecting part (14) for active connection with the discharge pipe.

7. A screw tip assembly for an injection molding machine as defined in claim 1, wherein One end of the ring-shaped dismounting piece body (21) along the length direction is provided with a square limiting piece (22) which is hollow inside, the square limiting piece (22) is extended from the inner cavity of the ring-shaped dismounting piece body (21) to the outside of the ring-shaped dismounting piece body (21).

8. A screw tip assembly for an injection molding machine as defined in claim 7, wherein, The inner cavity of the ring-shaped dismounting piece body (21) forms a second protrusion (24) matched with the first grooves (16) and a second groove (23) matched with the first protrusions (17).

9. A screw tip assembly for an injection molding machine as defined in claim 7, wherein The central axis of the square limiting piece (22) is the same as the central axis of the ring-shaped dismounting piece body (21).

10. A screw tip assembly for an injection molding machine as defined in claim 1, wherein, The screw head part (11) includes a conical section and a cylindrical section which are integrally formed, the cylindrical section is connected with the intermediate connecting part (12), the outer diameter of the side of the conical section away from the intermediate connecting part (12) is smaller than the outer diameter of the side close to the intermediate connecting part (12), and the length of the first grooves (16) is greater than the length of the cylindrical section.

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