Screw head assembly for injection molding machine

Abstract

The invention 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 invention relates to the technical field of injection molding machine assemblies, in particular to a screw head assembly for an injection molding machine. Background Art

[0002] The injection molding machine is a precision mechanical equipment used to produce various plastic products. It melts the plastic material by heating it, injects it into the mold, and cools it to solidify, thus forming the desired plastic product. The screw head of the injection molding machine is the key part of the injection unit. It is responsible for transferring the molten plastic material to the nozzle through the discharge pipe; the screw head is usually made of high temperature resistant and wear-resistant materials to ensure long-term stable operation and extend service life.

[0003] When the existing screw head is installed on the discharge pipe of the injection molding machine, it is usually handled by using the combination of several disassembly parts, and the disassembly method is relatively complicated. Therefore, it is very important to provide a screw head assembly that can solve the above technical problems. Summary of the invention

[0004] In order to solve the above problems, an object of the present invention is to provide a screw head assembly for an injection molding machine.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] The present invention provides a screw head assembly for an injection molding machine, which is arranged between a nozzle and a discharge pipe when in use, and comprises a screw head and a screw head disassembly part;

[0007] The screw head comprises a screw head, an intermediate connecting part, a limiting part, a tailstock connecting part, which are integrally formed and sequentially connected, and an annular part which is sleeved on the outer surface of the intermediate connecting part and clamped between the conical head and the limiting part. The screw head is provided with first grooves at intervals in parallel on one side close to the intermediate connecting part, and a first protrusion is formed between adjacent first grooves.

[0008] The tailstock connecting part is connected to the discharge pipe, and the annular part and the middle connecting part form a cavity allowing the injection plastic to flow in and be transferred to the nozzle through the first groove; the screw head disassembly part includes an annular disassembly part body, which is hollow inside and has a cavity in which the first groove and the first protrusion are clamped.

[0009] In one embodiment of the present invention, the central axes of the screw head, the intermediate connecting portion, the limiting portion and the tailstock connecting portion are the same.

[0010] In one embodiment of the present invention, the limiting portion is in a truncated cone shape, and its outer diameter on the side close to the screw head is smaller than the outer diameter on the side away from the screw head; the maximum outer diameter of the limiting portion is the same as the outer diameter of the discharge pipe.

[0011] In one embodiment of the present invention, the inner diameter of the annular portion is smaller than the maximum outer diameter of the limiting portion, smaller than the maximum outer diameter of the screw head, and larger than the outer diameter of the first groove.

[0012] In one embodiment of the present invention, the outer diameter of the annular portion is larger than the maximum outer diameter of the limiting portion, and larger than the maximum outer diameter of the screw head.

[0013] In one embodiment of the present invention, an outer surface of the tailstock connection portion is provided with an external thread for movably connecting with the discharge pipe.

[0014] In one embodiment of the present invention, the annular disassembly component body is provided with an internally hollow square limiter at one end along its length direction, and the square limiter extends from the inner cavity of the annular disassembly component body to the outside of the annular disassembly component body (to allow connection with other disassembly components).

[0015] In one embodiment of the present invention, the inner cavity of the annular disassembly member 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 present invention, the central axis of the square limiting member is the same as the central axis of the annular disassembly member body.

[0017] In one embodiment of the present invention, the screw head comprises an integrally formed conical section and a cylindrical section;

[0018] The cylindrical section is connected to the middle connecting portion, and the outer diameter of the tapered section on the side away from the middle connecting portion is smaller than the outer diameter on the side close to the middle connecting portion;

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

[0020] In one embodiment of the present invention, the end portion where the conical segment is connected to the cylindrical segment has the same outer diameter as the cylindrical segment.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The cooperation between the screw head and the screw head disassembly part in the screw head assembly for the injection molding machine provided by the present invention can easily realize the assembly and disassembly of the screw head and the discharge pipe; in the daily maintenance and troubleshooting of the injection molding machine, on the one hand, it can improve the efficiency of screw head assembly and disassembly and improve maintenance efficiency; on the other hand, it can enhance safety and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a screw head assembly for an injection molding machine (the screw head and the screw head disassembly parts are assembled);

[0024] Figure 2 It is a structural schematic diagram of a screw head assembly for an injection molding machine (the screw head and the screw head disassembly parts are not assembled);

[0025] Figure 3 A side view of a screw head in a screw head assembly for an injection molding machine (excluding the annular portion);

[0026] Figure 4 A side view of a screw head in a screw head assembly for an injection molding machine (including a ring-shaped portion);

[0027] Figure 5 A cross-sectional view of a screw head in a screw head assembly for an injection molding machine (including an annular portion);

[0028] Figure 6 This is a front view (screw head direction) of a screw head disassembly part in a screw head assembly for an injection molding machine;

[0029] Numbers in the figure: 1, screw head; 2, screw head disassembly part; 11, screw head; 12, intermediate connecting part; 13, limiting part; 14, tailstock connecting part; 15, annular part; 16, first groove; 17, first protrusion; 21, annular disassembly part body; 22, square limiting part; 23, second groove; 24, second protrusion. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the 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 corresponding functions.

[0035] Example 1

[0036] This embodiment provides a screw head assembly for an injection molding machine, such as Figures 1 to 6 As shown, when in use, it is arranged between the nozzle and the discharge pipe, including a screw head 1 and a screw head removal piece 2; the screw head 1 includes a screw head 11, an intermediate connecting part 12, a limiting part 13, a tail seat connecting part 14, which are integrally formed and connected in sequence, and an annular part 15 which is sleeved on the outer surface of the intermediate connecting part 12 and clamped between the conical head and the limiting part 13, and the screw head 11 is provided with first grooves 16 in parallel and at intervals on one side close to the intermediate connecting part 12, and a first protrusion 17 is formed between adjacent first grooves 16; the tail seat connecting seat 14 is connected to the discharge pipe, and the annular part 15 and the intermediate connecting part 12 form a cavity allowing the injection plastic to flow into and pass it to the nozzle via the first groove 16; the screw head removal piece 2 includes an annular removal piece body 21, the annular removal piece body 21 is hollow inside, and has a cavity in which the first groove 16 and the first protrusion 17 are clamped.

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

[0038] Furthermore, the limiting portion 13 is in a truncated cone shape, and the outer diameter of the side close to the screw head 11 is smaller than the outer diameter of the side away from the screw head 11; the maximum outer diameter of the limiting portion 13 is the same as the outer diameter of the discharge pipe;

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

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

[0041] Furthermore, the outer surface of the tailstock connection portion 14 is provided with an external thread for movably connecting with the discharge pipe.

[0042] Furthermore, the annular disassembly part body 21 is provided with an internally hollow square limiter 22 at one end along its length direction, and the square limiter 22 extends from the inner cavity of the annular disassembly part body 21 to the outside of the annular disassembly part body 21 (allowing it to be connected with other disassembly parts (such as a wrench)).

[0043] Furthermore, the inner cavity of the annular disassembly member body 21 forms a second protrusion 24 adapted to the first groove 16, and a second groove 23 adapted to the first protrusion 17;

[0044] Furthermore, the central axis of the square limiting member 22 is the same as the central axis of the annular disassembly member body 21 .

[0045] Furthermore, the screw head 11 includes an integrally formed conical section and a cylindrical section; the cylindrical section is connected to the intermediate connecting portion 12, and the outer diameter of the conical section away from the intermediate connecting portion 12 is smaller than the outer diameter of the side close to the intermediate connecting portion 12; the length of the first groove 16 is greater than the length of the cylindrical section.

[0046] Furthermore, the end portion where the conical section is connected to the cylindrical section has the same outer diameter as the cylindrical section; and the conical section is arranged at a section facing the nozzle.

[0047] During assembly, the side of the annular disassembly member body 21 away from the square stopper 22 is sleeved on the outside of the screw head 11 (the first groove 16 is clamped with the second protrusion 24, and the first protrusion 17 is clamped with the second groove 23), and the tailstock connection part 14 is placed on the end of the discharge pipe, and the square stopper 22 is clamped with an external wrench, and the tailstock connection part 14 is rotated and driven to be threadedly connected with the discharge pipe until the stopper 13 fits with the end of the discharge pipe;

[0048] When in use, the material inside 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 portion 15 and the middle connecting portion 12, and is transported to the inner cavity of the nozzle through the first groove 16;

[0049] During disassembly, the external wrench is engaged with the square stopper 22 and rotated in a manner opposite to that during assembly until the tailstock connection portion 14 is separated from the discharge pipe.

[0050] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the explanation of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A screw head assembly for an injection molding machine, which is arranged between a nozzle and a discharge pipe when in use, and is characterized in that: It comprises a screw head (1) and a screw head removal part (2); The screw head (1) comprises a screw head (11), an intermediate connecting part (12), a limiting part (13), a tailstock connecting part (14) which are integrally formed and sequentially connected, and an annular part (15) which is sleeved on the outer surface of the intermediate connecting part (12) and clamped between the conical head and the limiting part (13); a first groove (16) is arranged in parallel and at intervals on one side of the screw head (11) close to the intermediate connecting part (12); and a first protrusion (17) is formed between adjacent first grooves (16); The tailstock connecting seat (14) is connected to the discharge pipe, and the annular portion (15) and the middle connecting portion (12) form a cavity allowing the material to flow in and be transferred to the nozzle via the first groove (16); The screw head disassembly piece (2) comprises an annular disassembly piece body (21), the annular disassembly piece body (21) is hollow inside and has a cavity in which a first groove (16) and a first protrusion (17) are clamped.

2. A screw head assembly for an injection molding machine according to claim 1, characterized in that: The central axes of the screw head (11), the intermediate connecting portion (12), the limiting portion (13) and the tailstock connecting portion (14) are the same.

3. A screw head assembly for an injection molding machine according to claim 1, characterized in that: The limiting portion (13) is in the shape of a truncated cone, and the outer diameter of the side close to the screw head (11) is smaller than the outer diameter of the side away from the screw head (11); the maximum outer diameter of the limiting portion (13) is the same as the outer diameter of the discharge pipe.

4. A screw head assembly for an injection molding machine according to claim 3, characterized in that: The inner diameter of the annular portion (15) is smaller than the maximum outer diameter of the limiting portion (13), smaller than the maximum outer diameter of the screw head (11), and larger than the outer diameter of the first groove (16).

5. The screw head assembly for an injection molding machine according to claim 3, characterized in that: The outer diameter of the annular portion (15) is greater than the maximum outer diameter of the limiting portion (13), and greater than the maximum outer diameter of the screw head (11).

6. The screw head assembly for an injection molding machine according to claim 1, characterized in that: The outer surface of the tailstock connection portion (14) is provided with an external thread for movably connecting with the discharge pipe.

7. The screw head assembly for an injection molding machine according to claim 1, characterized in that: An inner hollow square stopper (22) is provided at one end of the annular disassembly component body (21) along its length direction. The square stopper (22) extends from the inner cavity of the annular disassembly component body (21) to the outside of the annular disassembly component body (21).

8. The screw head assembly for an injection molding machine according to claim 7, characterized in that: The inner cavity of the annular disassembly member body (21) forms a second protrusion (24) matched with the first groove (16), and a second groove (23) matched with the first protrusion (17).

9. The screw head assembly for an injection molding machine according to claim 7, characterized in that: The central axis of the square limiting member (22) is the same as the central axis of the annular disassembly member body (21).

10. The screw head assembly for an injection molding machine according to claim 1, characterized in that: The screw head (11) comprises an integrally formed conical section and a cylindrical section; the cylindrical section is connected to the middle connecting section (12), and the outer diameter of the conical section on the side away from the middle connecting section (12) is smaller than the outer diameter on the side close to the middle connecting section (12); the length of the first groove (16) is greater than the length of the cylindrical section.

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