Cylinder and hot nozzle having the same

Abstract

The utility model discloses a cylinder and have the hot nozzle of this cylinder, the cylinder includes: cylinder body, cylinder core, cylinder core movably sets in the cylinder body, and cylinder core is configured as can move along the preset axis relative to cylinder body, and cylinder core is equipped with the through hole, and the axis of through hole is coaxial with the preset axis, and the through hole includes first threaded hole and second threaded hole, and the arrangement direction of first threaded hole and second threaded hole is same with the axial direction of preset axis, and the pitch of first threaded hole is different with the pitch of second threaded hole, screw, screw is worn in first threaded hole and is connected with first threaded hole screw thread, hang needle piece, at least part hang needle piece is worn in the through hole, and hang needle piece has the threaded portion of wearing in second threaded hole and is connected with second threaded hole screw thread, lock washer, lock washer sets up in the through hole, and is held between screw and hang needle piece.

Description

Technical Field

[0001] This utility model relates to the field of hot nozzle technology, and in particular to a cylinder and a hot nozzle having the cylinder. Background Technology

[0002] In hot runner injection molding, the hot nozzle, as a core component, controls the flow of molten plastic and the opening and closing of the gate by using a cylinder to drive the movement of a valve needle, thereby achieving high-precision injection molding. The cylinder structure in traditional hot nozzles faces numerous challenges during long-term operation, especially under high temperature and high pressure environments, where the stability of the valve needle position becomes a key factor affecting product quality.

[0003] In related technologies, the valve needle is connected to the pin block of the cylinder. However, the pin block is prone to loosening, which can cause the valve needle to loosen or deviate in position, affecting the sealing and opening / closing accuracy of the gate. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a cylinder that can reduce the risk of the hanging pin block becoming loose.

[0005] This utility model also proposes a hot nozzle having the above-mentioned cylinder.

[0006] A cylinder according to a first aspect of the present invention includes: a cylinder body; a cylinder core movably disposed within the cylinder body, the cylinder core being configured to move relative to the cylinder body along a preset axis, the cylinder core having a through hole, the axis of the through hole being coaxial with the preset axis, the through hole including a first threaded hole and a second threaded hole, the arrangement direction of the first threaded hole and the second threaded hole being the same as the axial direction of the preset axis, the pitch of the first threaded hole being different from the pitch of the second threaded hole; a screw passing through the first threaded hole and threadedly connected to the first threaded hole; a pin block, at least a portion of the pin block passing through the through hole, and the pin block having a threaded portion passing through the second threaded hole and threadedly connected to the second threaded hole; and an anti-loosening washer disposed within the through hole and abutting between the screw and the pin block.

[0007] The cylinder according to the embodiment of this utility model has at least the following beneficial effects: In the cylinder of this utility model, the position of the valve needle connected to the hanging pin block can be adjusted by adjusting the position of the screw and the hanging pin block relative to the cylinder core. Since the pitch of the first threaded hole used to mate with the screw and the pitch of the second threaded hole used to mate with the threaded part are different, and when the position of the screw and the hanging pin block relative to the cylinder core is fixed, the anti-loosening washer is held between the screw and the hanging pin block. In this way, the risk of the screw and the hanging pin block loosening can be greatly reduced.

[0008] According to some embodiments of the present invention, the screw has a first adjustment hole, which extends along the preset axis and passes through the screw; the pin block has a second adjustment hole, which passes through the side of the pin block near the screw and extends along the preset axis.

[0009] According to some embodiments of this utility model, a plane perpendicular to the preset axis is defined as a reference plane, and the projection of the first adjustment hole on the reference plane covers the projection of the second adjustment hole on the reference plane.

[0010] According to some embodiments of the present invention, the cross-section of the first adjustment hole is a polygonal structure, and the cross-section of the second adjustment hole is a polygonal structure.

[0011] According to some embodiments of the present invention, the through hole further includes a smooth hole located between the first threaded hole and the second threaded hole, at least a portion of the hanging pin block is inserted into the smooth hole, the outer side wall of the hanging pin block inserted into the smooth hole is provided with a first mounting groove, a first sealing ring is provided in the first mounting groove, and the first sealing ring abuts against the hole wall of the smooth hole.

[0012] According to some embodiments of the present invention, the diameter of the smooth hole is larger than the diameter of the first threaded hole, so that a limiting step is formed between the smooth hole and the first threaded hole, and the end of the hanging pin block near the first threaded hole is limited and engaged with the limiting step.

[0013] According to some embodiments of the present invention, the cylinder body is provided with an inner cavity, a first through hole located on one side of the inner cavity, and a second through hole located on the other side of the inner cavity. The first through hole and the second through hole are arranged opposite to each other, and the arrangement direction of the first through hole and the second through hole is parallel to the preset axis. The cylinder core has a piston disposed in the inner cavity and an extension connected to the piston. The extension passes through the first through hole and is sealed to the wall of the first through hole. The through hole passes through the piston and the extension.

[0014] According to some embodiments of the present invention, the wall of the first through hole is provided with a second mounting groove, and a second sealing ring is provided in the second mounting groove, the second sealing ring abutting against the outer wall of the extension.

[0015] A hot nozzle according to a second aspect of the present invention includes a cylinder as described in the above embodiment; a valve needle, one end of which is connected to the hanging pin block, and the valve needle extends from the hanging pin block away from the screw.

[0016] The hot nozzle according to the embodiment of this utility model has at least the following beneficial effects: The hot nozzle of this utility model has a cylinder as described in the above embodiment. In the cylinder, the position of the valve needle connected to the hanging pin block can be adjusted by adjusting the position of the screw and the hanging pin block relative to the cylinder core. Since the pitch of the first threaded hole for engaging with the screw and the pitch of the second threaded hole for engaging with the threaded part are different, and when the position of the screw and the hanging pin block relative to the cylinder core is fixed, the anti-loosening washer is held between the screw and the hanging pin block. In this way, the risk of the screw and the hanging pin block loosening can be greatly reduced.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of a cylinder according to an embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the structure of a heat nozzle according to an embodiment of the present invention.

[0019] Icon labels: 10. Second adjustment tool; 100. Cylinder body; 101. Inner cavity; 102. First through hole; 103. Second through hole; 104. Second mounting groove; 110. Main body; 120. Cover; 200, Cylinder core; 201, Through hole; 2011, First threaded hole; 2012, Second threaded hole; 2013, Smooth hole; 210, Piston; 220, Extension; 230, Limiting step; 240, Anti-loosening washer; 300, Screw; 301, First Adjustment Hole; 400, Pin hanging block; 401, First mounting groove; 402, Second adjustment hole; 410, Threaded part; 500, valve needle; 600. First sealing ring; 700, Second sealing ring; 800, panel; 900, Diverter plate. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 , Figure 2 As shown, a cylinder provided in one embodiment of the present invention includes a cylinder body 100, a cylinder core 200, a screw 300, a hanging pin block 400, and an anti-loosening washer 240.

[0024] The cylinder body 100 is a hollow structure with an inner cavity 101.

[0025] Specifically, the cylinder body 100 includes a main body 110 and a cover 120, which are connected and enclose to form an inner cavity 101.

[0026] The cylinder core 200 is movably disposed within the cylinder body 100, and is configured to move relative to the cylinder body 100 along a predetermined axis. Specifically, the cylinder core 200 can be driven by gas to move along the predetermined axis. More specifically, the cylinder core 200 provides the inner cavity 101 of the cylinder body 100 and divides the inner cavity 101 into two chambers, the arrangement direction of the two chambers being parallel to the predetermined axis; combined with Figure 1 and Figure 3 The cylinder is mounted on a panel 800, which has two airflow channels. One airflow channel is connected to one of the chambers, and the other airflow channel is connected to another chamber. When the cylinder is filled through one airflow channel, the other airflow channel is vented. In this way, filling different airflow channels can drive the cylinder core 200 to move in different directions.

[0027] Combination Figure 1 and Figure 2 The cylinder core 200 is provided with a through hole 201. The axis of the through hole 201 is coaxial with the preset axis. In other words, the through hole 201 extends along the axial direction of the preset axis and passes through both ends of the cylinder core 200 along the axial direction of the preset axis.

[0028] The through hole 201 includes a first threaded hole 2011 and a second threaded hole 2012. The arrangement direction of the first threaded hole 2011 and the second threaded hole 2012 is the same as the axial direction of the preset axis. Specifically, along the axial direction of the preset axis, the through hole 201 is divided into multiple segments, one of which is the first threaded hole 2011 and the other is the second threaded hole 2012. Both the first threaded hole 2011 and the second threaded hole 2012 are coaxially arranged with the preset axis.

[0029] Furthermore, the pitch of the first threaded hole 2011 is different from the pitch of the second threaded hole 2012. It should be noted that in some embodiments, the pitch of the first threaded hole 2011 is greater than the pitch of the second threaded hole 2012, and in other embodiments, the pitch of the second threaded hole 2012 is greater than the pitch of the first threaded hole 2011.

[0030] The screw 300 passes through the first threaded hole 2011 and is threadedly connected to the first threaded hole 2011.

[0031] Specifically, the screw 300 has an external thread, the pitch of which matches the pitch of the internal thread of the first threaded hole 2011. The screw 300 passes through the first threaded hole 2011, and the external thread of the screw 300 engages with the internal thread of the first threaded hole 2011. The screw 300 is a headless screw; by rotating the screw 300, it can move along a preset axis. Of course, the direction in which the screw 300 moves varies depending on the direction of rotation.

[0032] At least a portion of the pin block 400 passes through the through hole 201, and the pin block 400 has a threaded portion 410 that passes through and is threadedly connected to the second threaded hole 2012. The pin block 400 is used to connect the valve needle 500, one end of the valve needle 500 is connected to the pin block 400, and the valve needle 500 extends from the pin block 400 away from the screw 300.

[0033] Specifically, the threaded portion 410 has an external thread, the pitch of which matches the pitch of the internal thread of the second threaded hole 2012. The threaded portion 410 passes through the first threaded hole 2011, and the external thread of the threaded portion 410 engages with the internal thread of the second threaded hole 2012. By rotating the pin-hanging block 400, the pin-hanging block 400 can be moved along a preset axis. Of course, the direction in which the pin-hanging block 400 moves varies depending on the direction in which it is rotated.

[0034] An anti-loosening washer 240 is disposed within the through hole 201 and abuts against the screw 300 and the pin block 400. The anti-loosening washer 240 reduces the risk of the screw 300 and the pin block 400 becoming loose. Understandably, when the positions of the screw 300 and the pin block 400 relative to the cylinder core 200 are fixed, the anti-loosening washer 240 abuts against them. This increases not only the pressure between the external thread of the screw 300 and the internal thread of the first threaded hole 2011, but also the pressure between the external thread of the threaded portion 410 and the internal thread of the second threaded hole 2012, thus reducing the risk of the screw 300 and the pin block 400 becoming loose.

[0035] In the cylinder of this utility model, the position of the valve needle 500 connected to the pin block 400 can be adjusted by adjusting the position of the screw 300 and the pin block 400 relative to the cylinder core 200. Since the pitch of the first threaded hole 2011 that mates with the screw 300 and the pitch of the second threaded hole 2012 that mates with the threaded part 410 are different, and when the position of the screw 300 and the pin block 400 relative to the cylinder core 200 is fixed, the anti-loosening washer 240 abuts between the screw 300 and the pin block 400. In this way, the risk of the screw 300 and the pin block 400 becoming loose can be greatly reduced.

[0036] Combination Figure 1 and Figure 2 In some embodiments, the screw 300 has a first adjustment hole 301, which extends along a preset axis and passes through the screw 300; the pin block 400 is provided with a second adjustment hole 402, which passes through the side of the pin block 400 near the screw 300 and extends along a preset axis.

[0037] Understandably, when it is necessary to adjust the position of screw 300, the first adjusting tool (not shown) can be inserted into the first adjusting hole 301, and then the first adjusting tool can be rotated to drive screw 300 to rotate; when it is necessary to adjust the position of hanging pin block 400, the second adjusting tool 10 can be inserted into the second adjusting hole 402 through the first adjusting hole 301, and then the second adjusting tool 10 can be rotated to drive hanging pin block 400 to rotate.

[0038] It is understandable that the cross-section of the first adjustment hole 301 is a polygonal structure, and the cross-section of the first adjustment tool is a polygonal structure that matches the cross-section of the first adjustment hole 301. After the first adjustment tool is inserted into the first adjustment hole 301, a part of it is exposed to the outside. In this way, the operator can hold the first adjustment tool exposed to the outside and then rotate the first adjustment tool to drive the screw 300 to rotate, thereby adjusting the position of the screw 300.

[0039] The cross-section of the second adjusting hole 402 is a polygonal structure, and the cross-section of the second adjusting tool 10 is a polygonal structure that matches the cross-section of the second adjusting hole 402. After the second adjusting tool 10 extends into the second adjusting hole 402 through the first adjusting hole 301, a portion of it remains exposed. This allows the operator to hold the exposed portion of the second adjusting tool 10 and rotate it to rotate the hanging pin block 400, thereby adjusting its position. It should be noted that... Figure 1 and Figure 2 Only a portion of the structure of the second adjustment tool 10 is shown in the image.

[0040] Specifically, in this embodiment, the cross-section of the first adjustment hole 301 and the cross-section of the second adjustment hole 402 are both hexagonal structures. Of course, in other embodiments, the cross-section of the first adjustment hole 301 and / or the cross-section of the second adjustment hole 402 can be triangular, quadrilateral or other polygonal structures.

[0041] A plane perpendicular to a preset axis is defined as a reference plane. The projection of the first adjustment hole 301 onto the reference plane overlaps the projection of the second adjustment hole 402 onto the reference plane. In other words, the cross-sectional area of ​​the first adjustment hole 301 is larger than the cross-sectional area of ​​the second adjustment hole 402. Thus, the second adjustment tool 10 can smoothly pass through the first adjustment hole 301 and extend into the second adjustment hole 402, and engage with the second adjustment hole 402.

[0042] In some embodiments, the through hole 201 further includes a smooth hole 2013 located between the first threaded hole 2011 and the second threaded hole 2012, at least a portion of the pin block 400 is inserted into the smooth hole 2013, the outer wall of the pin block 400 inserted into the smooth hole 2013 is provided with a first mounting groove 401, a first sealing ring 600 is provided in the first mounting groove 401, and the first sealing ring 600 abuts against the hole wall of the smooth hole 2013.

[0043] Specifically, along the axial direction of the preset axis, the smooth hole 2013 is located between the first threaded hole 2011 and the second threaded hole 2012. The axis of the smooth hole 2013 is coaxial with the preset axis, and the smooth hole 2013 refers to a hole whose wall has no thread structure. A portion of the hanging pin block 400 is inserted into the smooth hole 2013. A first mounting groove 401 is provided on the outer wall of this portion of the hanging pin block 400 inserted into the smooth hole 2013. The first mounting groove 401 is an annular structure and is coaxial with the preset axis. A first sealing ring 600 is disposed in the first mounting groove 401. The first mounting groove 401 is used to fix the first sealing ring 600, and the first sealing ring 600 also abuts against the hole wall of the smooth hole 2013 to improve the sealing performance.

[0044] Furthermore, the diameter of the smooth hole 2013 is larger than the diameter of the first threaded hole 2011, so that a limiting step 230 is formed between the smooth hole 2013 and the first threaded hole 2011, and the end of the pin-hanging block 400 near the first threaded hole 2011 is limited and engaged with the limiting step 230. It can be understood that the limiting step 230 is used to limit the extreme position of the pin-hanging block 400 moving toward the first threaded hole 2011. At the same time, the limiting step 230 can prevent the pin-hanging block 400 from moving into the first threaded hole 2011 and damaging the internal thread of the first threaded hole 2011.

[0045] Combination Figure 1 and Figure 2 In some embodiments, the cylinder body 100 is further provided with a first through hole 102 located on one side of the inner cavity 101 and a second through hole 103 located on the other side of the inner cavity 101. The first through hole 102 and the second through hole 103 are arranged opposite to each other, and the arrangement direction of the first through hole 102 and the second through hole 103 is parallel to a preset axis. The cylinder core 200 has a piston 210 disposed in the inner cavity 101 and an extension 220 connected to the piston 210. The extension 220 passes through the first through hole 102 and is sealed to the hole wall of the first through hole 102. The through hole 201 passes through the piston 210 and the extension 220.

[0046] Furthermore, the wall of the first through hole 102 is provided with a second mounting groove 104, and a second sealing ring 700 is provided in the second mounting groove 104. The second sealing ring 700 abuts against the outer wall of the extension 220.

[0047] Specifically, the second mounting groove 104 is annular and coaxially arranged with the preset axis. The second sealing ring 700 is disposed in the second mounting groove 104. The second mounting groove 104 is used to position the second sealing ring 700. The second sealing ring 700 also abuts against the outer wall of the extension 220 to improve the sealing performance.

[0048] This utility model also provides a hot nozzle, including the cylinder and valve needle 500 of the above embodiment. One end of the valve needle 500 is connected to the hanging pin block 400, and the valve needle 500 extends from the hanging pin block 400 away from the screw 300.

[0049] In the hot nozzle of this utility model, the position of the valve needle 500 connected to the pin block 400 can be adjusted by adjusting the position of the screw 300 and the pin block 400 relative to the cylinder core 200. Since the pitch of the first threaded hole 2011 that mates with the screw 300 and the pitch of the second threaded hole 2012 that mates with the threaded part 410 are different, and when the position of the screw 300 and the pin block 400 relative to the cylinder core 200 is fixed, the anti-loosening washer 240 abuts between the screw 300 and the pin block 400. In this way, the risk of the screw 300 and the pin block 400 loosening can be greatly reduced.

[0050] It should be noted that during the use of the hot nozzle, the valve needle 500 will come into contact with the high-temperature molten adhesive. Due to thermal expansion and contraction, the length of the valve needle 500 will change. Therefore, by adjusting the position of the screw 300 and the hanging pin block 400 relative to the cylinder core 200, the position of the valve needle 500 can be adjusted, thereby avoiding damage to the gate.

[0051] like Figure 3 As shown, the hot nozzle further includes a manifold 900, to which the cylinder 100 is fixed. It is understood that the manifold 900 has channels for molten adhesive to flow in, and the manifold 900 is also subject to thermal expansion and contraction. By fixing the cylinder 100 to the manifold 900, the positions of the valve needle 500 and the channels on the manifold 900 through which the valve needle 500 passes are relatively fixed. Thus, even if the manifold 900 undergoes thermal expansion and contraction, the risk of needle jamming can be reduced.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," 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 the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cylinder, characterized in that, include: Cylinder block; A cylinder core is movably disposed within the cylinder body. The cylinder core is configured to move relative to the cylinder body along a preset axis. The cylinder core has a through hole, the axis of which is coaxial with the preset axis. The through hole includes a first threaded hole and a second threaded hole. The arrangement direction of the first threaded hole and the second threaded hole is the same as the axial direction of the preset axis. The pitch of the first threaded hole is different from the pitch of the second threaded hole. A screw, wherein the screw passes through the first threaded hole and is threadedly connected to the first threaded hole; The pin block, at least a portion of which is inserted through the through hole, has a threaded portion that is inserted through the second threaded hole and threadedly connected to the second threaded hole; An anti-loosening washer is disposed in the through hole and abuts against the screw and the hanging pin block.

2. The cylinder according to claim 1, characterized in that, The screw has a first adjustment hole that extends along the preset axis and passes through the screw; the pin block has a second adjustment hole that passes through the side of the pin block near the screw and extends along the preset axis.

3. The cylinder according to claim 2, characterized in that, Define a plane perpendicular to the preset axis as a reference plane, and the projection of the first adjustment hole on the reference plane covers the projection of the second adjustment hole on the reference plane.

4. The cylinder according to claim 2, characterized in that, The first adjustment hole has a polygonal cross-section, and the second adjustment hole has a polygonal cross-section.

5. The cylinder according to claim 1, characterized in that, The through hole also includes a smooth hole located between the first threaded hole and the second threaded hole. At least a portion of the hanging pin block passes through the smooth hole. The outer wall of the hanging pin block passing through the smooth hole is provided with a first mounting groove. A first sealing ring is provided in the first mounting groove. The first sealing ring abuts against the hole wall of the smooth hole.

6. The cylinder according to claim 5, characterized in that, The diameter of the smooth hole is larger than the diameter of the first threaded hole, so that a limiting step is formed between the smooth hole and the first threaded hole, and the end of the hanging pin block near the first threaded hole is limited and engaged with the limiting step.

7. The cylinder according to claim 1, characterized in that, The cylinder body has an inner cavity, a first through hole on one side of the inner cavity, and a second through hole on the other side of the inner cavity. The first through hole and the second through hole are arranged opposite to each other, and the arrangement direction of the first through hole and the second through hole is parallel to the preset axis. The cylinder core has a piston disposed in the inner cavity and an extension connected to the piston. The extension passes through the first through hole and is sealed to the hole wall of the first through hole. The through hole passes through the piston and the extension.

8. The cylinder according to claim 7, characterized in that, The first through hole has a second mounting groove on its wall, and a second sealing ring is provided in the second mounting groove. The second sealing ring abuts against the outer wall of the extension.

9. A heating nozzle, characterized in that, include: The cylinder according to any one of claims 1 to 8; A valve needle, one end of which is connected to the hanging pin block, and the valve needle extends from the hanging pin block away from the screw.

10. The hot nozzle according to claim 9, characterized in that, The hot nozzle also includes a manifold, and the cylinder is fixed to the manifold.

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