Cylinder block assembly and hot runner system

Abstract

The utility model provides a cylinder assembly and a hot runner system, and the cylinder assembly comprises a cylinder body provided with a containing cavity, and the first side face of the cylinder body is further provided with a pressure groove extending in the first direction; the piston reciprocates in the accommodating cavity; the first radiating fin is arranged on the first side surface of the cylinder body; at least part of the heat conduction column is arranged in the pressure groove, and one end of the heat conduction column is connected with the first cooling fin; the elastic piece is arranged in the pressure groove, and the two ends of the elastic piece abut against the bottom of the pressure groove and the heat conduction column respectively, so that the heat conduction column can move in the pressure groove in the first direction. According to the cylinder body assembly, the pressure groove is formed in the cylinder body, the elastic piece and the heat conduction column are arranged in the pressure groove, the heat conduction column transmits heat of the cylinder body to the first cooling fin, the elastic piece pushes the first cooling fin to abut against the heated structure, and it is ensured that the heat of the cylinder body can be guided out through the first cooling fin.

Description

Technical Field

[0001] This application relates to the field of hot runner technology, and more particularly to a cylinder block assembly and a hot runner system provided with the cylinder block assembly. Background Technology

[0002] In hot runner systems, hydraulic / pneumatic cylinders are used to drive valve needles in reciprocating motion to achieve dispensing / sealing of the adhesive. To ensure the adhesive in the hot runner system maintains a sufficient temperature, the system requires heating. The cylinder body is typically connected to the manifold, which transfers heat from the manifold to the cylinder body. Furthermore, the reciprocating motion of the piston within the cylinder also generates significant heat. Excessive cylinder body temperature can shorten the lifespan of the hydraulic / pneumatic cylinder and easily cause aging and damage to the seals within the cylinder, affecting its sealing performance.

[0003] Currently, copper sheets are placed on the surface of the cylinder block, utilizing the high thermal conductivity of copper to transfer heat from the cylinder block to the mold plate, thereby reducing the temperature of the cylinder block. However, this heat dissipation is mainly achieved through the contact between the copper sheets and the mold, and the installation of the copper sheets requires high precision in the mold opening process. In actual installation, inaccurate mold opening often results in the heat dissipation fins and the mold plate not making complete contact, affecting the heat dissipation effect of the cylinder block. Summary of the Invention

[0004] The purpose of this application is to provide a cylinder assembly in which an elastic element is provided between the cylinder body and the first heat sink. When the cylinder assembly is installed into the template, the elastic force of the elastic element is used to press the first heat sink against the template, ensuring normal heat dissipation of the cylinder and solving the problem in the prior art where the heat dissipation effect of the cylinder is affected by the inaccurate mold opening.

[0005] To achieve one of the above-mentioned objectives, one embodiment of this application provides a cylinder block assembly, comprising:

[0006] The cylinder body is provided with a receiving cavity, and a pressure groove extending along a first direction is also provided on the first side of the cylinder body.

[0007] The piston reciprocates within the receiving cavity;

[0008] The first heat sink is disposed on the first side of the cylinder body;

[0009] A heat-conducting column is at least partially disposed within the pressure groove, and one end of the heat-conducting column is connected to the first heat sink.

[0010] An elastic element is disposed in the pressure groove, and its two ends abut against the bottom of the pressure groove and the heat-conducting column, respectively, so that the heat-conducting column can move in the pressure groove along the first direction.

[0011] In one embodiment of this application, the outer periphery of the heat-conducting column matches the inner wall shape of the pressure groove, thereby making the outer periphery of the heat-conducting column fit against the inner wall of the pressure groove.

[0012] In one embodiment of this application, the heat-conducting column is provided with a mounting groove with an opening facing the first heat sink, the first heat sink is provided with a mounting hole, and the cylinder assembly further includes a heat-conducting fastener that passes through the mounting hole and extends into the mounting groove.

[0013] In one embodiment of this application, four pressure grooves are provided, which are located at the four corners of the first side of the cylinder body.

[0014] In one embodiment of this application, a second heat sink is further included. The second heat sink is connected to the first heat sink and disposed on the second side of the cylinder body adjacent to the first side. The second heat sink is wavy and the wavy second heat sink is at least partially attached to the second side of the cylinder body.

[0015] In one embodiment of this application, the wave-shaped second heat sink forms a plurality of first heat dissipation surfaces and second heat dissipation surfaces. The first heat dissipation surfaces are attached to the second side surface of the cylinder body, and the second heat dissipation surfaces are attached to the heated carrier.

[0016] In one embodiment of this application, a base and a fixing member are also included. The cylinder body is further provided with a first fixing hole, and the fixing member passes through the first fixing hole and is connected to the base.

[0017] In one embodiment of this application, the first fixing hole is coaxially arranged with the pressure groove, and the first fixing hole penetrates the bottom wall of the pressure groove away from the opening, and the inner diameter of the first fixing hole is less than the inner diameter of the pressure groove.

[0018] The fastener includes a head and a connecting part that are connected to each other. The connecting part passes through the first fixing hole and is connected to the base. The head is located at the bottom of the pressure groove.

[0019] In one embodiment of this application, a spacer block is provided between the base and the cylinder body. The spacer block is sleeved outside the fixing member and is used to separate the base and the cylinder body.

[0020] One embodiment of this application also provides a hot runner system, including a manifold, a hot nozzle connected to the manifold, a valve needle disposed in the hot nozzle, and a cylinder assembly for driving the valve needle to reciprocate within the hot nozzle, wherein the cylinder assembly is the cylinder assembly as described above.

[0021] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0022] The cylinder assembly provided in this application has an elastic element between the cylinder body and the first heat sink. When the cylinder assembly is installed into the template, the elastic force of the elastic element is used to press the first heat sink against the template. The heat is transferred from the cylinder body to the first heat sink through the heat-conducting column in the pressure groove of the cylinder body, and then the heat is transferred to the template through the first heat sink, ensuring that the cylinder body can dissipate heat normally. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the cylinder block assembly in an embodiment of this application.

[0024] Figure 2 yes Figure 1 Top view of the middle cylinder block assembly.

[0025] Figure 3 yes Figure 2 Schematic diagram of cross section along line AA.

[0026] Figure 4 yes Figure 3 Enlarged view of section B in the middle.

[0027] 1. Cylinder body; 11. Pressure groove; 12. First fixing hole; 13. Connector; 21. First heat sink; 211. Mounting hole; 22. Second heat sink; 221. First heat dissipation surface; 222. Second heat dissipation surface; 3. Heat-conducting column; 31. Mounting groove; 4. Spring; 5. Heat-conducting fastener; 6. Base; 61. First positioning hole; 62. Second fixing hole; 7. Fixing component; 71. Head; 72. Connecting part; 8. Heat insulation plate; 81. Second positioning hole; 9. Spacer block. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Furthermore, it should be understood that although the terms "first," "second," etc., may be used herein to describe various elements or structures, the objects described should not be limited by these terms. These terms are only used to distinguish these objects from one another. For example, a first heat sink may be referred to as a second heat sink, and similarly, a second heat sink may be referred to as a first heat sink, without departing from the scope of protection of this application.

[0033] This application provides a cylinder block assembly that can be used in a hot runner system. Accordingly, this application also provides a hot runner system, which includes a manifold, a hot nozzle connected to the manifold, a valve needle disposed in the hot nozzle, and a cylinder block assembly that drives the valve needle to reciprocate within the hot nozzle.

[0034] like Figures 1-4 As shown, the cylinder assembly in the aforementioned hot runner system includes a cylinder body 1, a piston, a first heat sink 21, a heat-conducting column 3, and an elastic element. The cylinder body 1 is provided with a receiving cavity, and a pressure groove 11 extending along a first direction is also provided on the first side of the cylinder body 1. The piston reciprocates within the receiving cavity. The first heat sink 21 is disposed on the first side of the cylinder body 1. The heat-conducting column 3 is at least partially disposed within the pressure groove 11, and one end of the heat-conducting column 3 is connected to the first heat sink 21. The elastic element is disposed within the pressure groove 11, and its two ends abut against the bottom of the pressure groove 11 and the heat-conducting column 3, respectively, so that the heat-conducting column 3 can move within the pressure groove 11 along the first direction.

[0035] In the cylinder assembly provided in this application, a pressure groove 11 is provided in the cylinder body 1, and an elastic element and a heat-conducting column 3 are provided in the pressure groove 11. One end of the elastic element abuts against the bottom of the pressure groove 11, and the other end abuts against the heat-conducting column 3. The heat-conducting column 3 is connected to the first heat sink 21. When the elastic element is subjected to pressure, it will apply a thrust to the heat-conducting column 3, so that the first heat sink 21 connected to the heat-conducting column 3 is pushed by the heat-conducting column 3 until the pressure on the elastic element disappears, or the first heat sink 21 abuts against other components.

[0036] When the cylinder assembly is used in a hot runner system, the cylinder assembly is placed inside the cavity of the template, and the first heat sink 21 abuts against the inner wall of the cavity under the action of elastic force. The heat-conducting column 3 obtains heat from the cylinder body 1 and transfers the heat to the first heat sink 21, which then transfers the heat to the template. This avoids the situation where the first heat sink 21 and the template cannot make complete contact due to inaccurate template opening. The cylinder assembly of this application has excellent heat dissipation effect.

[0037] Preferred, such as Figure 3 In this paper, the elastic element is spring 4. Of course, the elastic element can also be other structures such as a spring sheet. This paper takes spring 4 as an example.

[0038] Furthermore, the outer periphery of the heat-conducting column 3 matches the inner wall shape of the pressure groove 11, thereby making the outer periphery of the heat-conducting column 3 fit against the inner wall of the pressure groove 11.

[0039] The shape of the pressure groove 11 can be any structure without restriction, as long as its inner circumference always extends in the first direction, so that the guide column can move in the first direction within the pressure groove 11. The outer circumference shape of the heat-conducting column 3 matches the inner circumference shape of the pressure groove 11, and the outer circumference of the heat-conducting column 3 fits against the inner wall of the pressure groove 11, so that the heat-conducting column 3 can effectively obtain heat from the cylinder body 1, avoiding the gap between the two from affecting the heat transfer.

[0040] Furthermore, the heat-conducting column 3 is provided with a mounting groove 31 with an opening facing the first heat sink 21, the first heat sink 21 is provided with a mounting hole 211, and the cylinder assembly also includes a heat-conducting fastener 5, which passes through the mounting hole 211 and extends into the mounting groove 31.

[0041] The heat-conducting column 3 and the first heat sink 21 are connected by a heat-conducting fastener 5. The heat-conducting fastener 5 and the heat-conducting column 3 have a large contact area, which can better transfer heat. Preferably, the inner wall of the mounting groove 31 is provided with threads, and the outer side of the heat-conducting fastener 5 is provided with threads. The heat-conducting fastener 5 passes through the mounting hole 211 and is threadedly connected to the mounting groove 31, so that the connection strength is greater.

[0042] Preferably, the thermally conductive fastener 5 can be made of copper, and the thermally conductive pillar 3, the first heat sink 21, and the second heat sink 22 mentioned below can all be made of copper. Of course, other materials with high thermal conductivity can also be used.

[0043] Furthermore, four pressure grooves 11 are provided, located at the four corners of the first side surface of the cylinder body 1. The four corners of the first heat sink 21 are respectively fixed to the four corners of the first side surface of the cylinder body 1, so that the first heat sink 21 is fixed and stable.

[0044] In some embodiments, the cylinder assembly further includes a second heat sink 22, which is connected to the first heat sink 21 and disposed on a second side adjacent to the first side in the cylinder body 1. The second heat sink 22 is wavy and the wavy second heat sink 22 is at least partially attached to the second side of the cylinder body 1.

[0045] like Figure 1 In the cylinder body 1, the first side is the top surface, and the four sides adjacent to the top surface are the second sides. The second heat sink 22 is disposed on three of the second sides, and the remaining second side is provided with two connectors 13 for supplying gas / oil to the cavity.

[0046] The second heat sink 22 is wavy, so that in the direction perpendicular to the first side, the second heat sink 22 can contact the cylinder body 1, and the side away from the cylinder body 1 can contact the inner wall of the template cavity for heat dissipation.

[0047] Furthermore, the wavy second heat sink 22 forms multiple first heat dissipation surfaces 221 and second heat dissipation surfaces 222. The first heat dissipation surfaces 221 are attached to the second side of the cylinder body 1, and the second heat dissipation surfaces 222 are used to attach to the heat-receiving carrier, such as the template. By providing the first heat dissipation surfaces 221 and second heat dissipation surfaces 222 on the second heat sink 22, the contact area of ​​the second heat sink 22 can be increased, thereby improving the heat conduction efficiency, rather than just having a line-surface contact with the cylinder body 1 / template.

[0048] In some embodiments, the cylinder assembly further includes a base 6 and a fixing member 7, and the cylinder body 1 is also provided with a first fixing hole 12, through which the fixing member 7 passes and is connected to the base 6.

[0049] In a hot runner system, the cylinder block assembly is typically connected to a manifold. A base 6 is located at the bottom of the cylinder body 1, and the base 6 is connected to the cylinder body 1 via a fastener 7. For example... Figure 3 In the middle, a second fixing hole 62 is provided on the base 6, and the base 6 is connected to the diverter plate through the second fixing hole 62.

[0050] Furthermore, the first fixing hole 12 is coaxially arranged with the pressure groove 11, and the first fixing hole 12 penetrates the bottom wall of the pressure groove 11 away from the opening. The inner diameter of the first fixing hole 12 is less than the inner diameter of the pressure groove 11. The fixing member 7 includes a head 71 and a connecting part 72 connected to each other. The connecting part 72 passes through the first fixing hole 12 and is connected to the base 6. The head 71 is located at the bottom of the pressure groove 11.

[0051] By coaxially aligning the first fixing hole 12 with the pressure groove 11, the number of holes required in the cylinder body 1 is reduced, thus shortening the machining cycle of the cylinder body 1. The number of the first fixing holes 12 is the same as that of the pressure groove 11, both being four, and they are located at the four corners of the cylinder body 1.

[0052] Each of the four corners of the base 6 is provided with a first positioning hole 61, which is provided with an internal thread. The connecting part 72 is provided with an external thread. One end of the connecting part 72 with the external thread extends into the pressure groove 11 from one side, passes through the first fixing hole 12, and is threadedly connected to the base 6. When the head 71 is located in the pressure groove 11, one end of the spring 4 abuts against the head 71 of the fixing part 7.

[0053] Furthermore, a heat insulation plate 8 is provided between the cylinder body 1 and the base 6. Each of the four corners of the heat insulation plate 8 is provided with a second positioning hole 81, through which the fixing member 7 also passes. The heat insulation plate 8 provided between the base plate and the cylinder body 1 can prevent the heat of the flow divider plate from being transferred to the cylinder body 1, thus cutting off the heat source of the cylinder body 1.

[0054] Furthermore, a spacer block 9 is provided between the base 6 and the cylinder body 1. The spacer block 9 is sleeved on the outside of the fixing member 7 and is used to separate the base 6 and the cylinder body 1.

[0055] like Figure 4 In the middle, the inner diameter of the heat insulation block matches the connecting part 72 of the fixing member 7, and the outer diameter is smaller at both ends and larger in the middle, so that steps are formed at both ends of the heat insulation block. One end of the heat insulation block extends into the second positioning hole 81, and the step formed at this end abuts against the bottom surface of the heat insulation plate 8.

[0056] The top inner diameter of the first positioning hole 61 is larger than the bottom inner diameter, and a step is also formed on the inner wall of the first positioning hole 61. The other end of the heat insulation block extends into the top of the first positioning hole 61, and the step at this end abuts against the step inside the first positioning hole 61, thereby separating the base 6 and the heat insulation plate 8. The spaced arrangement of the base 6 and the heat insulation plate 8 further restricts the heat transfer from the flow divider plate to the cylinder body 1.

[0057] 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.

[0058] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A cylinder assembly, characterized by The cylinder body is provided with a containing cavity, and a pressure groove extending in a first direction is arranged on a first side of the cylinder body. The piston reciprocates in the containing cavity. The first heat sink is arranged on the first side of the cylinder body. The heat-conducting column is at least partially arranged in the pressure groove, and one end of the heat-conducting column is connected with the first heat sink. The elastic member is arranged in the pressure groove and abuts against the bottom of the pressure groove and the heat-conducting column at two ends, so that the heat-conducting column can move in the pressure groove in the first direction. The outer peripheral shape of the heat-conducting column matches the inner wall shape of the pressure groove, so that the outer periphery of the heat-conducting column is in close contact with the inner wall of the pressure groove.

2. The cylinder assembly of claim 1, wherein, The heat-conducting column is provided with a mounting groove with an opening facing the first heat sink, the first heat sink is provided with a mounting hole, and the cylinder assembly further comprises a heat-conducting fastener which passes through the mounting hole and extends into the mounting groove.

3. The cylinder assembly of claim 2, wherein, The pressure groove is provided with four pressure grooves arranged at four corner portions of the first side of the cylinder body.

4. The cylinder assembly of claim 3, wherein, The second heat sink is connected with the first heat sink and arranged on a second side of the cylinder body adjacent to the first side, the second heat sink is in a wave shape, and the wave-shaped second heat sink is at least partially in close contact with the second side of the cylinder body.

5. The cylinder assembly of claim 1, wherein, The wave-shaped second heat sink forms a plurality of first heat sink surfaces and second heat sink surfaces, the first heat sink surfaces are in close contact with the second side of the cylinder body, and the second heat sink surfaces are used to be in close contact with a heated carrier.

6. The cylinder assembly of claim 5, wherein, The base and the fixing member are further included, the cylinder body is further provided with a first fixing hole, and the fixing member is connected with the base through the first fixing hole.

7. The cylinder assembly of claim 1, wherein, The first fixing hole is coaxially arranged with the pressure groove, the first fixing hole penetrates through the bottom wall of the pressure groove away from the opening, and the inner diameter of the first fixing hole is less than the inner diameter of the pressure groove.

8. The cylinder assembly of claim 7, wherein, The fixing member comprises a head portion and a connecting portion connected with each other, the connecting portion is connected with the base through the first fixing hole, and the head portion is arranged at the bottom of the pressure groove. A spacing block is arranged between the base and the cylinder body, the spacing block is sleeved outside the fixing member, and the base and the cylinder body are spaced by the spacing block.

9. The cylinder assembly of claim 7, wherein, The cylinder assembly is the cylinder assembly according to any one of claims 1-9.

10. A hot runner system characterized by, ​

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