Hot runner assembly

Abstract

The application provides a hot runner assembly, which comprises a distributor plate and a cylinder body, the distributor plate is provided with a fixing groove, and a thread is formed on the inner wall of the fixing groove; the cylinder body comprises a cylinder barrel, a piston and a connecting piece, the cylinder barrel is provided with an accommodating cavity, and a first clearance hole is formed in the bottom of the cylinder barrel; the piston reciprocates along the axial direction of the cylinder barrel in the accommodating cavity; the connecting piece is connected with the cylinder barrel and protrudes out of the bottom of the cylinder barrel from the first clearance hole, and a connecting part is arranged at the end of the connecting piece away from the bottom of the cylinder barrel, and the connecting part is provided with a thread to be screwed with the distributor plate. The distributor plate and the cylinder body are screwed together, so that a plurality of threaded holes are not needed to be formed on the distributor plate and the cylinder body for screwing, and the machining process and machining time are reduced.

Description

Technical Field

[0001] This invention relates to the field of hot runner systems, and more particularly to a hot runner assembly. Background Technology

[0002] Currently, the cylinder block and the manifold are fixed with screws, which requires multiple screw holes to be made on both the cylinder block and the manifold. Making screw holes requires time and wear and tear on tools and equipment. Furthermore, there is a risk that errors may occur between the screw holes on the cylinder block and the manifold, making it impossible to fix the cylinder block in place. This results in increased rework time and material waste. Summary of the Invention

[0003] The purpose of this invention is to provide a hot runner assembly in which a connector is provided in the cylinder body, and the cylinder body is connected to the manifold through the thread on the connector. This greatly reduces the number of screw holes between the cylinder body and the manifold, and solves the problem of increased time and material costs caused by fixing the cylinder body and the manifold with screws in the prior art.

[0004] To achieve one of the above-mentioned objectives, one embodiment of the present invention provides a hot runner assembly, comprising:

[0005] The diverter plate is provided with a fixing groove, and the inner wall of the fixing groove is threaded.

[0006] The cylinder body includes a cylinder barrel, a piston, and a connecting member. The cylinder barrel has a receiving cavity and a first clearance hole at its bottom. The piston reciprocates within the receiving cavity along the axial direction of the cylinder barrel. The connecting member is connected to the cylinder barrel and protrudes from the bottom of the cylinder barrel through the first clearance hole. The end of the connecting member away from the bottom of the cylinder barrel has a connecting portion with threads for threaded connection with the distributor plate.

[0007] As a further improvement of one embodiment of the present invention, it also includes a sealing member disposed in the receiving cavity, the sealing member being fixedly connected to the inner wall of the receiving cavity, and the top of the connecting member abutting against the bottom of the sealing member to support the sealing member and the cylinder.

[0008] As a further improvement of one embodiment of the present invention, the receiving cavity includes a first receiving cavity and a second receiving cavity, wherein the inner diameter of the first receiving cavity is larger than the inner diameter of the second receiving cavity;

[0009] The piston includes a first piston and a second piston connected to each other. The first piston abuts against the inner wall of the first receiving cavity and divides the first receiving cavity into an upper cavity and a lower cavity. The sealing member is provided with a second clearance hole for the second piston to pass through. The piston reciprocates along the axial direction of the second clearance hole.

[0010] As a further improvement of one embodiment of the present invention, the sealing member is fixed to the inner wall of the second receiving cavity, and a first sealing strip and a second sealing strip are respectively provided on the inner and outer sides of the sealing member to seal the first receiving cavity.

[0011] As a further improvement of one embodiment of the present invention, the inner diameter of the first clearance hole is smaller than the inner diameter of the second receiving cavity, the connecting member includes an abutting part and a supporting part, the abutting part is disposed in the second receiving cavity and abuts against the sealing member, and the outer diameter of the abutting part is larger than the inner diameter of the first clearance hole, and the supporting part passes through the first clearance hole.

[0012] As a further improvement of one embodiment of the present invention, the connecting member is hollow, providing a space for the lower part of the second piston to reciprocate.

[0013] As a further improvement of one embodiment of the present invention, the bottom of the second piston is provided with a connecting hole for connecting a valve needle.

[0014] As a further improvement of one embodiment of the present invention, it also includes a valve needle sleeve, wherein the connecting portion is provided with a fixing hole that matches the shape of the valve needle sleeve, so that the valve needle sleeve is disposed in the fixing hole.

[0015] As a further improvement of one embodiment of the present invention, the first receiving cavity has an opening at one end opposite to the second receiving cavity, and the cylinder body also includes a cylinder cover, which covers the opening of the first receiving cavity.

[0016] As a further improvement of one embodiment of the present invention, the cylinder head is threadedly connected to the cylinder barrel, and the cylinder head has a mounting groove on the side opposite to the first clearance hole for mounting and fixing the cylinder head.

[0017] One or more technical solutions provided by this invention have at least the following technical effects or advantages:

[0018] In the hot runner assembly provided by the present invention, the inner wall of the fixing groove of the manifold is provided with threads, the cylinder body includes a cylinder barrel and a connector protruding from the bottom of the cylinder barrel, the end of the connector protruding from the bottom of the cylinder barrel is provided with threads to cooperate with the fixing groove provided with threads on the manifold, thereby realizing the connection between the cylinder body and the manifold, avoiding the time and material costs caused by connecting the cylinder body and the manifold with screws. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the hot runner assembly in an embodiment of the present invention.

[0020] Figure 2 yes Figure 1 Top view of the hot runner assembly.

[0021] Figure 3 yes Figure 2 Schematic diagram of cross section along line AA.

[0022] Figure 4 yes Figure 3 Exploded view of the middle cylinder block.

[0023] 10. Cylinder block; 20. Flow divider; 201. Fixing groove;

[0024] 1. Cylinder; 11. Receiving cavity; 111. First receiving cavity; 1111. Upper cavity; 1112. Lower cavity; 112. Second receiving cavity; 12. First clearance hole; 2. Piston; 21. First piston; 22. Second piston; 221. Connecting hole; 3. Connecting piece; 31. Connecting part; 32. Support part; 33. Abutting part; 4. Sealing element; 41. Second clearance hole; 42. Second mounting groove; 51. First sealing strip; 52. Second sealing strip; 53. Third sealing strip; 54. Fourth sealing strip; 6. Valve needle sleeve; 7. Cylinder head; 71. First mounting groove. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The terms used in this document, such as “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” indicating spatial relative positions, are used for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms “spatial relative positions” may be intended to include different orientations of the equipment in use or operation other than those shown in the figures.

[0027] For example, if the device in the figure is flipped, a unit described as being "below" or "under" other units or features will be "above" other units or features. Therefore, the exemplary term "below" can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or otherwise) and the spatially related descriptive terms used herein will be interpreted accordingly.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] Furthermore, it should be understood that although the terms first, second, etc., may be used herein to describe various elements or structures, the objects being described should not be limited by these terms. These terms are only used to distinguish these objects from one another. For example, a first receiving cavity may be referred to as a second receiving cavity, and similarly, a second receiving cavity may be referred to as a first receiving cavity, without departing from the scope of protection of this application.

[0030] This invention provides a hot runner assembly, such as... Figure 1 As shown, the device includes a manifold 20 and a cylinder 10. The manifold 20 is provided with a fixing groove 201, and the inner wall of the fixing groove 201 is threaded. The cylinder 10 includes a cylinder barrel 1, a piston 2, and a connecting member 3. The cylinder barrel 1 is provided with a receiving cavity 11, and a first clearance hole 12 is opened at the bottom of the cylinder barrel 1. The piston 2 reciprocates along the axial direction of the cylinder barrel 1 within the receiving cavity 11. The connecting member 3 is connected to the cylinder barrel 1 and protrudes from the bottom of the cylinder barrel 1 through the first clearance hole 12. A connecting part 31 is provided at the end of the connecting member 3 away from the bottom of the cylinder barrel 1, and the connecting part 31 is threaded to be threadedly connected to the manifold 20.

[0031] Specifically, the receiving cavity 11 inside the cylinder body 10 includes a first receiving cavity 111 and a second receiving cavity 112. The second receiving cavity 112 is connected to the first relief hole 12. The inner diameter of the first receiving cavity 111 is larger than the inner diameter of the second receiving cavity 112, and the inner diameter of the second receiving cavity 112 is larger than the inner diameter of the first relief hole 12, so that a step is formed at the connection between the first receiving cavity 111 and the second receiving cavity 112, and a step is formed at the connection between the second receiving cavity 112 and the first relief hole 12.

[0032] The cylinder body 10 also includes a sealing member 4 disposed in the second receiving cavity 112. The sealing member 4 is fixedly connected to the inner wall of the second receiving cavity 112. In this embodiment, the outer periphery of the sealing member 4 is provided with threads, and the inner wall of the second receiving cavity 112 is also provided with threads (the threads are not shown in the figure). The sealing member 4 is threadedly connected to the inner wall of the second receiving cavity 112, so that the sealing member 4 is fixed to the cylinder 1. The top of the connecting member 3 abuts against the bottom of the sealing member 4. When the connecting member 3 is threadedly connected to the flow divider 20, the cylinder 1 is supported by the connecting member 3 through the sealing member 4 fixedly connected to the cylinder 1, thereby fixing the cylinder 1 relative to the flow divider 20 in the vertical direction.

[0033] The connector 3 also includes a support portion 32 and an abutment portion 33 that are connected to each other. The support portion 32 is connected to the connector 31 and protrudes from the bottom of the cylinder 1 through the first clearance hole 12. The abutment portion 33 is disposed in the second receiving cavity 112. The outer diameter of the abutment portion 33 is larger than the inner diameter of the first clearance hole 12. The upper surface of the abutment portion 33 abuts against the lower surface of the seal 4. The lower surface of the abutment portion 33 abuts against the step formed at the connection between the second receiving cavity 112 and the first clearance hole 12. In the vertical direction, the abutment portion 33 is restricted between the seal 4 and the step formed at the connection between the second receiving cavity 112 and the first clearance hole 12, thereby realizing the connection between the connector 3 and the cylinder 1.

[0034] The longitudinal section of piston 2 is T-shaped, and piston 2 includes a first piston 21 arranged laterally and a second piston 22 arranged longitudinally. The first piston 21 is disposed in the first receiving cavity 111 and the circumference of the first piston 21 abuts against the inner wall of the first receiving cavity 111, so that the first piston 21 divides the first receiving cavity 111 into an upper cavity 1111 and a lower cavity 1112.

[0035] The sealing element 4 is provided with a second clearance hole 41 that matches the outer diameter of the second piston 22. The connecting element 3 is a hollow structure that provides movement space for the movement of the second piston 22. The second piston 22 passes through the second clearance hole 41 and the hollow connecting element 3. The first piston 21 reciprocates in the first receiving cavity 111 along the axial direction of the cylinder 1, driving the second piston 22 to reciprocate along the axial direction of the second clearance hole 41.

[0036] The bottom of the second piston 22 is provided with a connecting hole 221 for connecting the valve needle. Thus, after the valve needle is connected to the bottom of the second piston 22, the movement of the piston 2 drives the valve needle to move.

[0037] Furthermore, a first sealing strip 51 and a second sealing strip 52 are respectively provided on the inner and outer sides of the sealing member 4 to seal the first receiving cavity 111, so that the gas or oil filled in the upper cavity 1111 or the lower cavity 1112 can move within the first receiving cavity 111 at different pressures on the first piston 21. Preferably, a third sealing strip 53 is provided on the outer side of the first piston 21 to seal the upper cavity 1111 and the lower cavity 1112 of the first receiving cavity 111.

[0038] The hot runner assembly provided in this embodiment also includes a valve needle sleeve 6. The connecting portion 31 is provided with a fixing hole that matches the shape of the valve needle sleeve 6, so that the valve needle sleeve 6 is disposed in the fixing hole. The aforementioned second clearance hole 41 cooperates with the second piston 22 to prevent the second piston 22 from wobbling in the horizontal direction when the piston 2 moves, which would cause the valve needle connected to the bottom of the second piston 22 to wobble. The valve needle sleeve 6 can be used to stabilize the valve needle and further prevent the valve needle from wobbling.

[0039] The first receiving cavity 111 has an opening at one end opposite to the second receiving cavity 112. The cylinder body 10 also includes a cylinder head 7, which covers the opening of the first receiving cavity 111. When assembling the cylinder body 10, the connecting member 3 is first inserted into the cylinder 1 from one end of the opening, so that one end of the connecting part 31 extends out of the cylinder 1 from the first clearance hole 12; then the sealing member 4 is inserted into the receiving cavity 11 from the opening, and the sealing member 4 is tightened to the inner wall of the second receiving cavity 112 through one end of the opening; then the piston 2 is inserted into the receiving cavity 11 from the opening, and the second piston 22 is aligned with the second clearance hole 41 and inserted; finally, the cylinder head 7 is placed on the opening.

[0040] Preferably, the cylinder head 7 is threadedly connected to the cylinder barrel 1. A first mounting groove 71 is provided on the side of the cylinder head 7 opposite to the first clearance hole 12 for mounting and fixing the cylinder head 7. The first mounting groove 71 assists in tightening the cylinder head 7 to the cylinder barrel 1. More preferably, a fourth sealing strip 54 is provided on the outer side of the cylinder head 7, which is more conducive to sealing the receiving cavity 11. Preferably, the sealing element 4 is provided with a second mounting groove 42.

[0041] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0042] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hot runner assembly, characterized in that, include: The diverter plate is provided with a fixing groove, and the inner wall of the fixing groove is threaded. The cylinder body includes a cylinder barrel, a piston, and a connecting member. The cylinder barrel has a receiving cavity and a first clearance hole at its bottom. The piston reciprocates within the receiving cavity along the axial direction of the cylinder barrel. The connecting member is connected to the cylinder barrel and protrudes from the bottom of the cylinder barrel through the first clearance hole. The connecting member has a connecting portion at its end away from the bottom of the cylinder barrel, and the connecting portion is threaded to be threadedly connected to the manifold plate. A sealing element is disposed within the receiving cavity, the sealing element is fixedly connected to the inner wall of the receiving cavity, and the top of the connecting element abuts against the bottom of the sealing element to support the sealing element and the cylinder.

2. The hot runner assembly according to claim 1, characterized in that, The receiving cavity includes a first receiving cavity and a second receiving cavity, wherein the inner diameter of the first receiving cavity is larger than the inner diameter of the second receiving cavity; The piston includes a first piston and a second piston connected to each other. The first piston abuts against the inner wall of the first receiving cavity and divides the first receiving cavity into an upper cavity and a lower cavity. The sealing member is provided with a second clearance hole for the second piston to pass through. The piston reciprocates along the axial direction of the second clearance hole.

3. The hot runner assembly according to claim 2, characterized in that, The sealing element is fixed to the inner wall of the second receiving cavity, and a first sealing strip and a second sealing strip are respectively provided on the inner and outer sides of the sealing element to seal the first receiving cavity.

4. The hot runner assembly according to claim 2, characterized in that, The inner diameter of the first clearance hole is smaller than the inner diameter of the second receiving cavity. The connector includes an abutting part and a supporting part. The abutting part is disposed in the second receiving cavity and abuts against the seal. The outer diameter of the abutting part is larger than the inner diameter of the first clearance hole. The supporting part passes through the first clearance hole.

5. The hot runner assembly according to claim 4, characterized in that, The connecting piece is hollow, providing space for the lower part of the second piston to reciprocate.

6. The hot runner assembly according to claim 5, characterized in that, The bottom of the second piston is provided with a connection hole for connecting the valve needle.

7. The hot runner assembly according to claim 4, characterized in that, It also includes a valve needle sleeve, and the connecting part is provided with a fixing hole that matches the shape of the valve needle sleeve so that the valve needle sleeve is disposed in the fixing hole.

8. The hot runner assembly according to claim 2, characterized in that, The first receiving cavity has an opening at one end opposite to the second receiving cavity, and the cylinder body also includes a cylinder cover, which covers the opening of the first receiving cavity.

9. The hot runner assembly according to claim 8, characterized in that, The cylinder head is threadedly connected to the cylinder barrel, and a mounting groove for fixing the cylinder head is provided on the side of the cylinder head away from the first clearance hole.

Images