Injection nozzle assembling mechanism

Abstract

The utility model discloses an injection molding nozzle assembling mechanism, and belongs to the technical field of injection molding machines. Comprising a connecting flange and a nozzle head, a first flow channel and a second flow channel are formed in the middle of the connecting flange and the middle of the nozzle head in a penetrating mode respectively, and the first flow channel is communicated with the second flow channel; a plurality of mounting holes are formed in the connecting flange, mounting bolts are arranged in the mounting holes in a penetrating manner, the connecting flange is fixedly connected with a conveying barrel of the injection molding machine through the mounting bolts, and the nozzle head is mounted on the connecting flange; the nozzle further comprises a heating sleeve, the surface of the nozzle head and the surface of the connecting flange are coated with the heating sleeve, a first limiting table and a second limiting table are arranged in an inner cavity of the heating sleeve, the first limiting table abuts against the nozzle head, a tensioning hole is formed in the second limiting table, and the mounting bolt penetrates through the tensioning hole and the mounting hole and then is connected to a material conveying barrel of the injection molding machine. The utility model gets rid of the traditional installation mode of the nozzle, the nozzle is convenient to fix, and the stability of the nozzle is improved at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of injection molding nozzle assembly mechanism, belong to injection molding machine technical field. BACKGROUND

[0002] Injection molding machine is also named injection molding machine or injection machine, it is the main molding equipment that thermoplastic or thermosetting plastic is made into various shapes of plastic products using plastic molding die;It is divided into vertical, horizontal, full electric type etc. Injection molding machine can heat plastic, melt plastic is subjected to high pressure, so that it fills mold cavity. On the composition of injection molding machine, it is usually composed of injection system, clamping system, hydraulic transmission system, electrical control system, lubrication system, heating and cooling system, safety monitoring system etc. Injection system is one of the most important components of injection molding machine, mainly has plunger type, screw type, screw pre-plastic plunger injection type 3 main forms. Screw type injection molding machine plasticizing device is mainly composed of feeding device, cylinder, screw, glue assembly, nozzle part. In a working cycle of injection molding machine, a certain amount of plastic can be heated and plasticized within a specified time, and the molten plastic is injected into mold cavity through screw under certain pressure and speed. After injection, the melt injected into the mold cavity is kept in shape.

[0003] Injection nozzle is a part used for injecting molten plastic material on injection molding machine, also known as injection nozzle (or nozzle), it is an important part connecting injection molding machine and mold, flow channel is opened in injection nozzle, which is used to deliver molten plastic in cylinder of injection molding machine to mold at appropriate pressure and temperature to form the required plastic product. Injection nozzle is usually made of metal or plastic material, with high temperature resistance and wear resistance, it includes feed port, nozzle, nozzle tip and nozzle hole, in the injection molding process, molten plastic is pushed by screw of injection molding machine, and is pushed into injection nozzle through heating and pressure, and then is injected into mold cavity through nozzle hole.

[0004] As shown in Figure 1 The existing injection molding machine nozzle is usually connected with the material conveying pipe of injection molding machine through flange, and in order to prevent the internal material from cooling, hoop type heating mechanism needs to be arranged on the injection molding machine nozzle, large end of connecting flange and small end of connecting flange, if the screw inside the material conveying pipe of injection molding machine needs to be disassembled, the heating mechanism outside the injection molding machine nozzle, the heating mechanism on the small end of connecting flange, the heating mechanism on the large end of connecting flange and the connecting flange need to be disassembled in sequence, so that the structure at the injection molding machine nozzle is complicated, and the disassembly is complicated. In addition, the existing injection molding machine nozzle is generally connected in the form of thread, in order to ensure the sealing, it needs to be screwed tightly, so as to cause not only time-consuming and laborious disassembly, but also thread decoupling phenomenon, which leads to loose connection of injection molding machine nozzle and leakage phenomenon. SUMMARY

[0005] In order to overcome the above prior art deficiencies, the utility model provides a kind of injection nozzle assembly mechanism.

[0006] The utility model employs the technical scheme that: design a kind of injection nozzle assembly mechanism, assemble in injection molding machine feed cylinder and use, including connecting flange and nozzle head, the first flow channel and the second flow channel are respectively arranged in the connecting flange and nozzle head middle part, the first flow channel and the second flow channel are communicated;Multiple mounting holes are provided on the connecting flange, and mounting bolts are provided in the mounting holes, and the connecting flange and the injection molding machine feed cylinder are connected and fixed by multiple mounting bolts, and the nozzle head is installed on the connecting flange.

[0007] It further includes a heating jacket, the heating jacket is covered on the surface of the nozzle head and the connecting flange, an electric heating layer is arranged in the heating jacket, and the electric heating layer is covered on the nozzle head and the connecting flange;The nozzle head is inserted into the end of the connecting flange and can slide axially along the connecting flange, a first limiting table and a second limiting table are arranged in the inner cavity of the heating jacket, the first limiting table abuts on the nozzle head, a tension hole is arranged on the second limiting table, the mounting bolt is connected to the injection molding machine feed cylinder after penetrating through the tension hole and the mounting hole, and the heating jacket tightens the nozzle head and the connecting flange in its interior, so that the connecting flange is tightly abutted on the injection molding machine feed cylinder, and the nozzle head is tightly abutted on the connecting flange.

[0008] Further, a first temperature sensing hole is arranged on the heating jacket, a second temperature sensing hole is arranged on the nozzle head, the first temperature sensing hole and the second temperature sensing hole are communicated, a temperature probe is arranged on the first temperature sensing hole, and the temperature probe is communicated with the second flow channel in the nozzle head through the second temperature sensing hole.

[0009] Further, the nozzle head includes a nozzle portion, a limiting portion and an insertion portion, which are integrally formed, the insertion portion is inserted into the connecting flange, the limiting portion abuts on the end face of the connecting flange, and the second temperature sensing hole is arranged on the limiting portion.

[0010] Further, a guide strip is arranged on the outer surface of the insertion portion, a corresponding guide groove is arranged in the first flow channel of the connecting flange, and the guide strip is inserted into the guide groove.

[0011] Further, the guide strip and the second temperature sensing hole are located on the same side of the nozzle head and on a straight line.

[0012] Further, the connecting flange includes a large end and a small end which are integrally formed, the insertion portion is inserted into the small end, the limiting portion abuts on the end face of the small end of the connecting flange, and a sealing ring is arranged between the limiting portion and the small end.

[0013] Further, the heating sleeve comprises a first cylinder part, a second cylinder part and a third cylinder part which are integrally formed, the first cylinder part and the second cylinder part are connected to form a first limiting platform, and the second cylinder part and the third cylinder part are connected to form a second limiting platform.

[0014] Further, the first cylinder part covers the nozzle part, the second cylinder part covers the limiting part and the small end of the connecting flange, and the third cylinder part covers the large end of the connecting flange, the depth of the inner cavity of the second cylinder part is less than the sum of the height of the limiting part and the small end of the connecting flange, and the depth of the inner cavity of the third cylinder part is not greater than the height of the large end of the connecting flange.

[0015] Further, the electric heating layer comprises a first heating layer, a second heating layer and a third heating layer, the inner surfaces of the first cylinder part, the second cylinder part and the third cylinder part are respectively provided with the first heating layer, the second heating layer and the third heating layer, and the first heating layer, the second heating layer and the third heating layer are spirally arranged.

[0016] Further, the first heating layer, the second heating layer and the third heating layer are respectively electrically connected with an external power supply, or the first heating layer, the second heating layer and the third heating layer are connected in series and then electrically connected with the external power supply.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] The utility model discloses a set heating sleeve is arranged, and the nozzle head and the connecting flange are installed in the heating sleeve, and during the process of installing and fastening the heating sleeve, the nozzle head and the connecting flange in the heating sleeve are pulled tightly, the connecting flange is tightly pressed on the conveying cylinder of the injection molding machine, the nozzle head is tightly pressed on the connecting flange, a reliable connecting structure is formed, the structure of the nozzle of the injection molding machine is simplified, and the cumbersome dismounting is reduced.

[0019] The utility model discloses a set heating sleeve is arranged, and the nozzle head and the connecting flange are installed in the heating sleeve, and during the process of installing and fastening the heating sleeve, the nozzle head and the connecting flange in the heating sleeve are pulled tightly, the connecting flange is tightly pressed on the conveying cylinder of the injection molding machine, the nozzle head is tightly pressed on the connecting flange, a reliable connecting structure is formed, the structure of the nozzle of the injection molding machine is simplified, and the cumbersome dismounting is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 Prior art schematic diagram.

[0022] Figure 2 The present application is a schematic diagram of the exploded view.

[0023] Figure 3 The present application is a schematic diagram of the cross-sectional view.

[0024] Figure 4 The present application is a schematic diagram of the exploded view.

[0025] In the figure: 1, connecting flange; 2, nozzle head; 3, first flow channel; 4, second flow channel; 5, mounting bolt; 6, heating sleeve; 7, electric heating layer; 8, first limiting table; 9, second limiting table; 10, first temperature probe hole; 11, second temperature probe hole; 12, nozzle part; 13, limiting part; 14, insertion part; 15, guide bar; 16, guide groove; 17, large end; 18, small end; 19, sealing ring; 20, first cylinder part; 21, second cylinder part; 22, third cylinder part; 23, first heating layer; 24, second heating layer; 25, third heating layer. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, if the terms "mounting", "connection" and "connection" are used, they should be interpreted broadly, for example, they can be fixedly connected, or they can be detachably connected, or integrally connected; they can be mechanically connected, or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] Embodiment 1

[0029] As Figures 2-4 shown, an injection nozzle assembly mechanism is assembled on an injection machine feed cylinder (not shown in the figure) for use, comprising a connecting flange 1 and a nozzle head 2, a first flow channel 3 and a second flow channel 4 are respectively provided in the connecting flange 1 and the nozzle head 2, the first flow channel 3 and the second flow channel 4 are communicated, and during injection, the material flows out from the injection machine feed cylinder, and then flows out along the second flow channel 4 and the first flow channel 3. A plurality of mounting holes are provided on the connecting flange 1, mounting bolts 5 are provided in the mounting holes, and the connecting flange 1 is connected and fixed with the injection machine feed cylinder through the plurality of mounting bolts 5 (a threaded hole corresponding to the mounting hole is provided on the injection machine feed cylinder), and the nozzle head 2 is mounted on the connecting flange 1.

[0030] The injection nozzle assembly mechanism provided by the embodiment further comprises a heating sleeve 6, the heating sleeve 6 covers the surfaces of the nozzle head 2 and the connecting flange 1, an electric heating layer 7 (which needs to be connected with a power source for work) is provided in the heating sleeve 6, the electric heating layer 7 covers the nozzle head 2 and the connecting flange 1 to heat them, the nozzle head 2 is inserted into the end of the connecting flange 1 and can slide axially and rotate circumferentially along the connecting flange 1, which facilitates quick disassembly and assembly, a first limiting table 8 is provided in the inner cavity of the heating sleeve 6 and abuts against the nozzle head 2, a second limiting table 9 is provided in the inner cavity of the heating sleeve 6 and is provided with a tensioning hole, the mounting bolt 5 passes through the tensioning hole and the mounting hole and is connected to the injection machine feed cylinder, and the heating sleeve 6 tightens the nozzle head 2 and the connecting flange 1 inside it, so that the connecting flange 1 is tightly abutted against the injection machine feed cylinder and the nozzle head 2 is tightly abutted against the connecting flange 1. That is, the nozzle head 2, the connecting flange 1 and the heating sleeve 6 are all fixed firmly by the same batch of mounting bolts 5, the structure is stable and reliable, and the disassembly and assembly are convenient.

[0031] In the embodiment, a first temperature sensing hole 10 is provided on the heating sleeve 6, a second temperature sensing hole 11 is provided on the nozzle head 2, the first temperature sensing hole 10 and the second temperature sensing hole 11 are communicated, a temperature probe (or a temperature sensor, which is used to monitor and control the temperature of the material, not shown in the figure) is provided on the first temperature sensing hole 10, and the temperature probe is communicated with the second flow channel 4 inside the nozzle head 2 through the second temperature sensing hole 11.

[0032] Embodiment 2

[0033] The embodiment is further optimized and refined on the basis of the structure of the nozzle head 2 in Embodiment 1, specifically:

[0034] The nozzle head 2 comprises a nozzle part 12, a limiting part 13 and an insertion part 14, which are integrally formed, the insertion part 14 is inserted on the connecting flange 1, the limiting part 13 abuts against the end face of the connecting flange 1, so as to prevent the nozzle head 2 from being inserted into the connecting flange 1 excessively or not to the position, the second temperature detecting hole 11 is arranged on the limiting part 13, which is simple and convenient. The limiting part 13 can be a circular ring or a prismatic ring.

[0035] In the embodiment, the outer surface of the insertion part 14 is provided with a guide strip 15, the first flow channel 3 of the connecting flange 1 is provided with a corresponding guide groove 16, the guide strip 15 is inserted into the guide groove 16, the insertion of the nozzle head 2 is guided through the guide strip 15 and the guide groove 16, and the nozzle head 2 is prevented from rotating after being inserted, which is more convenient for connection and fixation and positioning of the second temperature detecting hole 11.

[0036] In order to further facilitate the positioning of the second temperature detecting hole 11, the guide strip 15 and the second temperature detecting hole 11 can be arranged on the same side of the nozzle head 2 and on a straight line, so as to facilitate the quick alignment of the first temperature detecting hole 10 and the second temperature detecting hole 11.

[0037] Embodiment 3

[0038] The embodiment is based on the embodiment 2, and further optimizes and refines the structure of the connecting flange 1, specifically:

[0039] The connecting flange 1 comprises an integrally formed large end 17 and a small end 18, the first flow channel 3 penetrates through the large end 17 and the small end 18, the insertion part 14 of the nozzle head 2 is inserted into the small end 18 and is completely immersed, the limiting part 13 abuts against the end face of the small end 18 of the connecting flange 1, and a sealing ring 19 is arranged between the limiting part 13 and the small end 18, so as to improve the sealing effect and prevent material leakage.

[0040] Embodiment 4

[0041] The embodiment is based on the embodiment 3, and further optimizes and refines the structure of the heating sleeve 6, specifically:

[0042] The heating sleeve 6 comprises an integrally formed first cylinder part 20, a second cylinder part 21 and a third cylinder part 22, the first cylinder part 20 and the second cylinder part 21 are connected to form a first limiting table 8, and the second cylinder part 21 and the third cylinder part 22 are connected to form a second limiting table 9, which has a simple and reliable structure and high integrity.

[0043] In the embodiment, the first cylinder part 20 is covered on the nozzle part 12, the second cylinder part 21 is covered on the limiting part 13 and the small end 18 of the connecting flange 1, and the third cylinder part 22 is covered on the large end 17 of the connecting flange 1. The inner cavity depth of the second cylinder part 21 is less than the sum of the height of the limiting part 13 and the small end 18 of the connecting flange 1, and the inner cavity depth of the third cylinder part 22 is not greater than the height of the large end 17 of the connecting flange 1, which facilitates the tensioning of the nozzle head 2 and the connecting flange 1 inside during the tightening of the mounting bolt 5.

[0044] Embodiment 5

[0045] The embodiment is further optimization and refinement of the structure of the electric heating layer 7 based on the embodiment 4, which is specifically as follows:

[0046] The electric heating layer 7 comprises a first heating layer 23, a second heating layer 24 and a third heating layer 25, and the inner surfaces of the first cylinder part 20, the second cylinder part 21 and the third cylinder part 22 are respectively provided with the first heating layer 23, the second heating layer 24 and the third heating layer 25, and the first heating layer 23, the second heating layer 24 and the third heating layer 25 are spirally arranged.

[0047] In the embodiment, the first heating layer 23, the second heating layer 24 and the third heating layer 25 are respectively electrically connected with an external power supply (not shown in the figure), or the first heating layer 23, the second heating layer 24 and the third heating layer 25 are connected in series and then electrically connected with the external power supply.

[0048] When the application is used, it is assembled on the feed cylinder of the injection molding machine. When the screw in the feed cylinder of the injection molding machine needs to be removed, the mounting bolt 5 is directly removed to remove all components blocking the front end of the screw, and then the screw is removed, which is convenient and fast. In addition, if the nozzle head 2 needs to be disassembled, after the application is removed, the disassembly of the nozzle head 2 can be completed manually, and there is no need to worry about the problems of disconnection or unstable connection of the nozzle head 2.

[0049] Further, in the description of the present application, unless otherwise specified, if the terms "a plurality of", "a plurality of", "a plurality of" are used, the meaning of two or more than two, "a plurality of", "a plurality of", "a plurality of" is one or more than one. In the description of the present application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "internal", "external" and other indicated orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, structure and operation, therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second", "third" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0050] The specific embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. An injection nozzle assembly mechanism, which is assembled on a feeding cylinder of an injection molding machine for use, comprising a connecting flange and a nozzle head, a first flow channel and a second flow channel are respectively arranged through the connecting flange and the nozzle head, and the first flow channel and the second flow channel are communicated; a plurality of mounting holes are arranged on the connecting flange, mounting bolts are arranged in the mounting holes, the connecting flange is connected and fixed with the feeding cylinder of the injection molding machine through the mounting bolts, and the nozzle head is mounted on the connecting flange. characterized in that Further comprising a heating sleeve, the heating sleeve covers the surfaces of the nozzle head and the connecting flange, an electric heating layer is arranged in the heating sleeve, and the electric heating layer covers the nozzle head and the connecting flange; the nozzle head is inserted into the end of the connecting flange and can slide axially along the connecting flange, a first limiting table and a second limiting table are arranged in the inner cavity of the heating sleeve, the first limiting table abuts against the nozzle head, a tension hole is arranged on the second limiting table, the mounting bolts pass through the tension hole and the mounting hole and are connected to the feeding cylinder of the injection molding machine, and the heating sleeve tightens the nozzle head and the connecting flange in the inner part of the heating sleeve, so that the connecting flange is tightly abutted against the feeding cylinder of the injection molding machine and the nozzle head is tightly abutted against the connecting flange.

2. The injection nozzle assembly of claim 1, wherein: A first temperature sensing hole is arranged on the heating sleeve, a second temperature sensing hole is arranged on the nozzle head, the first temperature sensing hole and the second temperature sensing hole are communicated, a temperature probe is arranged on the first temperature sensing hole, and the temperature probe is communicated with the second flow channel in the inner part of the nozzle head through the second temperature sensing hole.

3. The injection nozzle assembly of claim 2, wherein: The nozzle head comprises a nozzle part, a limiting part and an insertion part, which are integrally formed, the insertion part is inserted into the connecting flange, the limiting part abuts against the end face of the connecting flange, and the second temperature sensing hole is arranged on the limiting part.

4. The injection nozzle assembly of claim 3, wherein: A guide strip is arranged on the outer surface of the insertion part, and a corresponding guide groove is arranged in the first flow channel of the connecting flange, and the guide strip is inserted into the guide groove.

5. The injection nozzle assembly of claim 4, wherein: The guide strip and the second temperature sensing hole are located on the same side of the nozzle head and are on a straight line.

6. The injection nozzle assembly of claim 5, wherein: The connecting flange comprises integrally formed large and small ends, the insertion part is inserted into the small end, the limiting part abuts against the end face of the small end of the connecting flange, and a sealing ring is arranged between the limiting part and the small end.

7. The injection nozzle assembly of claim 6, wherein: The heating sleeve comprises integrally formed first, second and third cylinder parts, the first limiting table is formed at the joint of the first and second cylinder parts, and the second limiting table is formed at the joint of the second and third cylinder parts.

8. The injection nozzle assembly of claim 7, wherein: The first cylinder part covers the nozzle part, the second cylinder part covers the limiting part and the small end of the connecting flange, and the third cylinder part covers the large end of the connecting flange, the inner cavity depth of the second cylinder part is less than the sum of the height of the limiting part and the small end of the connecting flange, and the inner cavity depth of the third cylinder part is not greater than the height of the large end of the connecting flange.

9. The injection nozzle assembly of claim 8, wherein: The electric heating layer comprises first, second and third heating layers, the first, second and third heating layers are arranged on the inner surfaces of the first, second and third cylinder parts respectively, and the first, second and third heating layers are arranged in a spiral shape.

10. The injection nozzle assembly of claim 9, wherein: The first, second and third heating layers are respectively electrically connected with an external power supply, or the first, second and third heating layers are connected in series and then electrically connected with the external power supply.

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