Injection molding machine nozzle locking device

Abstract

The application belongs to the technical field of injection molding machines, and particularly relates to a nozzle locking device of an injection molding machine, which comprises a nozzle assembly and a locking assembly. The nozzle assembly comprises a driving component and a nozzle. The driving component can drive the nozzle to move towards a fixed mold plate fixed on a mounting table. The locking assembly is arranged on one side of the fixed mold plate close to the nozzle assembly, and comprises a moving component and at least one set of elastic components. Each set of elastic components comprises a locking piece and a compression spring. One end of the locking piece is connected with the fixed mold plate, and the other end is sleeved with the compression spring. The opposite ends of the compression spring abut against the locking piece and the moving component. A mold is arranged on the side of the fixed mold plate away from the nozzle assembly. When the nozzle contacts the mold and continuously moves to the side of the mold, the moving component can move to the side away from the fixed mold plate under the driving of the driving component. The compression spring is extruded under the action of the moving component and the locking piece, and the compression spring is in a first deformation state. The scheme can guarantee the locking state between the nozzle and the mold.

Description

Technical Field

[0001] This application belongs to the field of injection molding machine technology, specifically relating to an injection molding machine nozzle locking device. Background Technology

[0002] During the operation of an injection molding machine, the nozzle needs to be tightly connected to the mold to ensure that the molten plastic can be accurately and stably injected into the mold cavity. However, existing injection molding machine nozzles often have unstable connections with the mold, leading to problems such as material leakage and unstable pressure during injection, affecting product quality and production efficiency. Therefore, a device that can effectively lock the nozzle is needed to improve the working performance of the injection molding machine. Utility Model Content

[0003] The purpose of this application is to solve the problem of unstable connection between the nozzle and the mold in the prior art, which leads to problems such as material leakage and unstable pressure during the injection molding process.

[0004] This application provides a nozzle locking device for an injection molding machine, comprising: a nozzle assembly including a driving component and a nozzle connected thereto, the driving component being capable of driving the nozzle to move toward a fixed template fixed on a mounting platform, the driving component being slidably connected to the mounting platform; and a locking assembly disposed on the side of the fixed template near the nozzle assembly, the locking assembly including a moving component and at least one set of elastic components, one end of the moving component being connected to the driving component, each set of elastic components including a locking element and a compression spring, one end of the locking element being connected to the fixed template, and the other end being sleeved with a locking element. The compression spring is inserted through the end of the moving component away from the driving component. One end of the compression spring abuts against the inner wall of the moving component, and the other end abuts against the side of the locking member away from the fixed template. The fixed template is provided with a mold on the side away from the nozzle assembly. When the nozzle contacts the mold and moves continuously toward the mold side, the moving component can move toward the side away from the fixed template under the drive of the driving component. The compression spring is compressed under the action of the moving component and the locking member, and the compression spring is in a first deformation state.

[0005] In an exemplary embodiment of this application, when the nozzle is not moving toward the fixed template side, the moving component is in contact with the side of the fixed template toward the nozzle assembly, and the compression spring is in a second deformation state within the moving component, the deformation amount of the second deformation state being less than the deformation amount of the first deformation state.

[0006] In one exemplary embodiment of this application, the locking member includes: a spring spindle, one end of which is connected to the fixed template, and the other end of which extends toward one side of the driving component and is inserted into the moving component; the compression spring is sleeved on the spring spindle located inside the moving component; and a spring end cap, which is connected to the end of the spring spindle away from the fixed template, and the compression spring abuts between the moving component and the spring end cap.

[0007] In one exemplary embodiment of this application, the locking member further includes a fastening screw, and the spring spindle is detachably connected to the spring end cap via the fastening screw.

[0008] In one exemplary embodiment of this application, the spring mandrel is threadedly connected to the fixed template.

[0009] In one exemplary embodiment of this application, the moving component includes: a base, in which the spring spindle, on which the compression spring is sleeved, is inserted, and the compression spring abuts against the inner wall of the base; and a pull rod, one end of which is connected to the base and the other end of which is connected to the driving component.

[0010] In one exemplary embodiment of this application, the pull rod is detachably connected to the base via a fastener.

[0011] In one exemplary embodiment of this application, the fastener is a fixing nut.

[0012] In one exemplary embodiment of this application, the locking assembly includes a first set of elastic components and a second set of elastic components, the first set of elastic components and the second set of elastic components being respectively disposed on both radial sides of the pull rod.

[0013] In one exemplary embodiment of this application, the driving component includes a driving member and a bracket connected thereto. The bracket is slidably connected to the mounting platform. The driving member is located on the side of the bracket away from the mounting platform. The bracket is connected to the pull rod.

[0014] The injection molding machine nozzle locking device of this application has at least the following beneficial effects:

[0015] This application includes a nozzle assembly and a locking assembly. The nozzle assembly includes a drive component and a nozzle, while the locking assembly includes a moving component and at least one set of elastic components. Each set of elastic components includes a locking element and a compression spring. When the drive component drives the nozzle to contact the mold and continuously advance it towards the mold side, the mold applies a reaction force to the nozzle due to the constraint of the nozzle. This reaction force causes the drive component to slide on the mounting table, moving it away from the fixed mold plate. Since the moving component is connected to the drive component, during the movement of the drive component, the moving component also moves away from the fixed mold plate under the action of the drive component. The compression spring is compressed under the action of the moving component and the locking element, causing the compression spring to be in its first deformation state. At this time, the compression spring stores elastic potential energy and generates a thrust in the opposite direction to the reaction force, thereby maintaining a tight locking state between the nozzle and the mold, effectively avoiding problems such as material leakage and unstable pressure during the injection process, and strongly ensuring product quality and production efficiency.

[0016] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] Figure 1 This paper shows a schematic diagram of the structure of the injection molding machine nozzle locking device and the fixed template provided in the embodiment of this application.

[0020] Figure 2 An exploded view of the locking assembly provided in an embodiment of this application is shown.

[0021] Figure 3 This illustration shows a partial cross-sectional view of the base in contact with the fixed template when the nozzle and the mold are not in contact, according to an embodiment of this application.

[0022] Figure 4 This illustration shows a partial cross-sectional view of the base and the fixed template when the nozzle is in contact with the mold and the compression spring undergoes significant deformation, as provided in an embodiment of this application.

[0023] Figure 5A partial cross-sectional structural diagram of the elastic component provided in an embodiment of this application is shown.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Injection molding machine nozzle locking device;

[0026] 110. Nozzle assembly; 111. Drive component; 1110. Drive element; 1111. Bracket; 112. Nozzle;

[0027] 120. Locking assembly; 121. Moving part; 1210. Base; 1211. Pull rod; 1212. Fixing element; 122. Elastic element; 122a. First set of elastic elements; 122b. Second set of elastic elements; 1220. Locking element; 12200. Spring spindle; 12201. Spring end cap; 12202. Fastening screw; 1221. Compression spring;

[0028] 200, fixed template; 210, center hole. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0030] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0033] Figure 1 A schematic diagram of the structure of the injection molding machine nozzle locking device and the fixed platen is shown. Figure 2 An exploded view of the locking assembly is shown. Figure 3 The diagram shows a partial cross-sectional view of the base in contact with the fixed template when the nozzle is not in contact with the mold. Figure 4 The diagram shows a partial cross-sectional view of the base and the fixed template when the nozzle is in contact with the mold and the compression spring undergoes significant deformation. Figure 5 A partial cross-sectional structural diagram of the elastic component is shown.

[0034] Please see Figure 1 As shown in the figure, this application embodiment provides an injection molding machine nozzle locking device 100, which includes a nozzle assembly 110 and a locking assembly 120. The nozzle assembly 110 can inject material into the mold, and the locking assembly 120 can lock the nozzle assembly 110 to prevent the nozzle assembly 110 from shifting during operation, thereby ensuring the stability and accuracy of the injection molding operation.

[0035] Please continue to see Figure 1 As shown, the nozzle assembly 110 includes a drive component 111 and a nozzle 112. The nozzle 112 is connected to the drive component 111 via a material cylinder (not shown in the figure). The drive component 111 can drive the nozzle 112 to move toward the fixed template 200 side. The drive component 111 is slidably connected to the mounting table (not shown in the figure).

[0036] The mounting platform is provided with a slide rail (not shown in the figure) or a linear rail (not shown in the figure), and the drive component 111 is engaged on the slide rail or linear rail so that it can slide on the slide rail or linear rail.

[0037] It should be noted that, please refer to Figure 1 or Figure 2 As shown, the fixed template 200 is fixed on the mounting platform and is positioned opposite to the nozzle 112. A central hole 210 is provided on the fixed template 200, and the center line of the central hole 210 is on the same straight line as the axis of the nozzle 112. When the driving component 111 drives the nozzle 112 to move, the nozzle 112 can smoothly pass through this central hole 210 to achieve precise docking with the mold described below.

[0038] In addition, a mold (not shown in the figure) is provided on the side of the fixed template 200 away from the nozzle assembly 110. The nozzle 112 can contact the mold during operation, thereby injecting material into the mold and completing the injection molding operation.

[0039] Please see Figure 2 , Figure 3 and Figure 5 As shown, the locking assembly 120 is located on the side of the fixed template 200 near the nozzle assembly 110. The locking assembly 120 includes a moving part 121 and at least one set of elastic parts 122. One end of the moving part 121 is connected to the driving part 111. Each set of elastic parts 122 includes a locking element 1220 and a compression spring 1221. One end of the locking element 1220 is connected to the fixed template 200, and the other end is fitted with the compression spring 1221. The locking element 1220 with the compression spring 1221 passes through the end of the moving part 121 away from the driving part 111. One end of the compression spring 1221 contacts the inner wall of the moving part 121, and the other end contacts the side of the locking element 1220 away from the fixed template 200.

[0040] like Figure 4 and Figure 5 As shown, when the driving component 111 drives the nozzle 112 to contact the mold and continuously advance it towards the mold side, the mold applies a reaction force to the nozzle 112 because the nozzle 112 is restricted by the mold. This reaction force causes the driving component 111 to slide on the mounting table, moving it away from the fixed template 200. Since the moving component 121 is connected to the driving component 111, during the movement of the driving component 111, the moving component 121 also moves away from the fixed template 200 under the action of the driving component 111, thereby compressing the compression spring 1221 located inside the moving component 121, causing the compression spring 1221 to be in the first deformation state. At this time, the compression spring 1221 stores elastic potential energy and generates a thrust in the opposite direction to the reaction force, thereby maintaining a tight lock between the nozzle 112 and the mold, effectively avoiding problems such as material leakage and unstable pressure during the injection process, and strongly ensuring product quality and production efficiency.

[0041] In some embodiments of this application, see Figure 3As shown, when the nozzle 112 is not moving towards the fixed template 200, the moving component 121 is in contact with the side of the fixed template 200 facing the nozzle assembly 110. The compression spring 1221 is in a second deformation state within the moving component 121, and the deformation of the second deformation state is less than that of the first deformation state. That is, in the initial state, the compression spring 1221 has a certain pre-deformation within the moving component 121. This pre-deformation is mainly used to overcome the friction between the driving component 111 and the linear guide when the nozzle 112 moves towards the fixed template 200.

[0042] It should be noted that, see Figure 4 As shown, when the driving component 111 drives the nozzle 112 to move toward the fixed template 200, the driving component 111 will not be subjected to a large force, and the compression spring 1221 will not be further compressed in the moving component 121, thereby ensuring that the nozzle 112 as a whole can move forward. At this time, the moving component 121 and the fixed template 200 are in a close contact state.

[0043] It is worth mentioning that the deformation of the compression spring 1221 in the second deformation state is less than that in the first deformation state. This design ensures that the compression spring 1221 has sufficient elastic potential energy during operation to maintain the effective locking state between the nozzle 112 and the mold.

[0044] Further, see Figure 5 As shown, the moving component 121 includes a base 1210 and a pull rod 1211. The base 1210 can be made of ductile iron, which has good strength and shock absorption performance. The two axial ends of the pull rod 1211 are connected to the driving component 111 and the base 1210, respectively. The base 1210 is provided with a first through hole (not shown in the figure) and a second through hole (not shown in the figure) that pass through in the moving direction of the nozzle 112. The first through hole and the second through hole are interconnected, and the diameter of the first through hole is smaller than the diameter of the second through hole.

[0045] The longitudinal cross-sectional shape of the first through hole and the second through hole can be circular or other shapes, such as square, triangle, rhombus, etc.

[0046] Further, see Figure 5 As shown, the locking element 1220 includes a spring spindle 12200. The spring spindle 12200 can be made of stainless steel, which has good corrosion resistance and strength. A portion of the spring spindle 12200 is inserted into the first through hole and the second through hole, and another portion is located on the side of the base 1210 near the fixed template 200, with the portion of the spring spindle 12200 protruding from the base 1210 connected to the fixed template 200.

[0047] It is understandable that the size of the spring spindle 12200 is less than or equal to the diameter of the first through hole, so that the spring spindle 12200 can be inserted into the base 1210, and the tolerance can be controlled within ±0.01mm.

[0048] In addition, the spring spindle 12200 can be detachably connected to the fixed template 200 by means of snap-fit, thread or other connection.

[0049] For example, the portion of the spring spindle 12200 exposed above the base 1210 has an external thread (not shown in the figure), and the fixed template 200 has a connecting hole with an internal thread on the inner wall of the connecting hole. The spring spindle 12200 and the fixed template 200 are connected by the external thread and the internal thread.

[0050] In some embodiments of this application, see Figure 5 As shown, the compression spring 1221 is disposed in the second through hole and sleeved on the spring spindle 12200 inserted in the second through hole. One end of the compression spring 1221 is in contact with the inner bottom wall of the second through hole.

[0051] Please continue to see Figure 5 As shown, the locking member 1220 also includes a spring end cap 12201. The size of the spring end cap 12201 can be smaller than or equal to the diameter of the second through hole, so that the spring end cap 12201 will not abut against the base 1210 during the movement of the moving member 121, ensuring the smooth movement of the base 1210. The spring end cap 12201 is connected to the spring spindle 12200, and the other end of the compression spring 1221 abuts against the side of the spring end cap 12201 near the fixed template 200, so that the compression spring 1221 abuts between the base 1210 and the spring end cap 12201. In this way, during the movement of the moving member 121, the base 1210 can apply a compressive force to the compression spring 1221, and the compression spring 1221 compresses between the base 1210 and the spring end cap 12201.

[0052] It is worth mentioning that the spring end cap 12201 and the spring spindle 12200 can be detachably connected by screws, bolts or clips.

[0053] For example, see Figure 5 As shown, the locking element 1220 may also include a fastening screw 12202. The spring end cap 12201 is provided with a first mounting hole (not shown in the figure), and the spring spindle 12200 is provided with a second mounting hole (not shown in the figure). The first mounting hole and the second mounting hole are arranged opposite to each other. The fastening screw 12202 passes through the first mounting hole and connects to the second mounting hole, thereby detachably fixing the spring end cap 12201 to the spring spindle 12200.

[0054] Please refer to some embodiments of this application. Figure 2 As shown, one end of the pull rod 1211 is fixed to the center of the base 1210 by a fastener 1212. This fastener 1212 can be a structure such as a fixing nut, so that the pull rod 1211 and the base 1210 can be detachably connected.

[0055] In some embodiments of this application, please refer to... Figure 2 As shown, the locking assembly 120 includes two sets of elastic components 122, namely a first set of elastic components 122a and a second set of elastic components 122b. The compression springs 1221 of the two sets of elastic components 122 have identical parameters. The first set of elastic components 122a and the second set of elastic components 122b are located on opposite sides of the pull rod 1211. This symmetrical arrangement of the two sets of elastic components 122 effectively generates sufficient thrust to ensure that the nozzle 112 and the mold maintain a good locking state at all times, further improving the stability and reliability of the device.

[0056] Please refer to some embodiments of this application. Figure 1 or Figure 2 As shown, the driving component 111 includes a driving element 1110 and a bracket 1111 connected thereto. The bracket 1111 is slidably connected to the mounting platform and is engaged with a slide rail or linear rail on the mounting platform, allowing the bracket 1111 to slide on the slide rail or linear rail. The driving element 1110 is located on the side of the bracket 1111 away from the mounting platform. The driving element 1110 can drive the nozzle 112 to move hydraulically or electrically, and different driving methods can be designed according to different embodiments.

[0057] It is worth mentioning that, please see Figure 3 and Figure 4 As shown, the side of the pull rod 1211 away from the base 1210 is connected to the bracket 1111. When the nozzle 112 abuts against the mold, the bracket 1111 can drive the pull rod 1211 to move away from the fixed template 200, thereby driving the base 1210 to move away from the fixed template 200, so that the compression spring 1221 is compressed and a thrust is generated, thereby keeping the nozzle 112 locked to the mold, avoiding material leakage and unstable pressure, and ensuring product quality and production efficiency.

[0058] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A nozzle locking device for an injection molding machine, characterized in that, include: A nozzle assembly includes a drive component and a nozzle connected thereto, the drive component being capable of driving the nozzle to move toward a fixed template fixed on a mounting platform, the drive component being slidably connected to the mounting platform; A locking assembly is disposed on the side of the fixed template near the nozzle assembly. The locking assembly includes a moving part and at least one set of elastic parts. One end of the moving part is connected to the driving part. Each set of elastic parts includes a locking element and a compression spring. One end of the locking element is connected to the fixed template, and the other end is fitted with the compression spring and passes through the end of the moving part away from the driving part. One end of the compression spring abuts against the inner wall of the moving part, and the other end abuts against the side of the locking element away from the fixed template. Wherein, a mold is provided on the side of the fixed template away from the nozzle assembly. When the nozzle contacts the mold and moves continuously toward the mold side, the moving part can move away from the fixed template under the drive of the driving part. The compression spring is squeezed under the action of the moving part and the locking part, and the compression spring is in the first deformation state.

2. The injection molding machine nozzle locking device according to claim 1, characterized in that, When the nozzle is not moving toward the fixed template, the moving part is in contact with the side of the fixed template facing the nozzle assembly, and the compression spring is in a second deformation state within the moving part, the deformation of the second deformation state being less than the deformation of the first deformation state.

3. The injection molding machine nozzle locking device according to claim 2, characterized in that, The locking element includes: A spring spindle, one end of which is connected to the fixed template, and the other end extends toward one side of the drive component and is inserted into the moving component. The compression spring is sleeved on the spring spindle located inside the moving component. A spring end cap is connected to the end of the spring spindle away from the fixed template, and the compression spring abuts between the moving part and the spring end cap.

4. The injection molding machine nozzle locking device according to claim 3, characterized in that, The locking component also includes a fastening screw, through which the spring spindle is detachably connected to the spring end cap.

5. The injection molding machine nozzle locking device according to claim 3, characterized in that, The spring mandrel is threadedly connected to the fixed template.

6. The injection molding machine nozzle locking device according to claim 3, characterized in that, The movable component includes: The base, in which the spring core shaft, on which the compression spring is fitted, is inserted, and the compression spring abuts against the inner wall of the base; The pull rod has one end connected to the base and the other end connected to the drive component.

7. The injection molding machine nozzle locking device according to claim 6, characterized in that, The pull rod is detachably connected to the base via a fastener.

8. The injection molding machine nozzle locking device according to claim 7, characterized in that, The fastener is a fixing nut.

9. The injection molding machine nozzle locking device according to claim 6, characterized in that, The locking assembly includes a first set of elastic components and a second set of elastic components, which are respectively disposed on both radial sides of the pull rod.

10. The injection molding machine nozzle locking device according to claim 7, characterized in that, The driving component includes a driving element and a bracket connected thereto. The bracket is slidably connected to the mounting platform. The driving element is located on the side of the bracket away from the mounting platform. The bracket is connected to the pull rod.

Images