Hot runner system and control unit

Abstract

The present invention discloses a hot runner system and a control unit. The hot runner system includes a hot nozzle and a valve needle. The valve needle can be driven to slide. The hot runner system also includes a control unit. The control unit includes a drive cylinder, a base fixed relative to the drive cylinder, and a rotating beam rotatably connected to the base through a rotating shaft. The drive cylinder has a cylinder body and a drive rod that can reciprocate along a straight line. The movement direction of the drive rod is parallel to the sliding direction of the valve needle. A pull rod is fixedly connected to the drive rod, and the pull rod is connected to the rotating beam through a connecting shaft. A valve needle cap is fixedly provided on the valve needle, and the valve needle cap is connected to the rotating beam through the valve needle shaft. The control unit also includes a reinforcement component connected to the rotating beam, and the reinforcement component extends through the base. When the rotating beam rotates relative to the base, the reinforcement component moves relative to the base. The present invention makes the heat of the hot nozzle not affect the drive cylinder, and the overall structure is more stable and reliable.

Description

Technical Field

[0001] The invention relates to the field of hot runner molds, and in particular to a hot runner system and a control unit. Background Art

[0002] At present, the injection mold commonly used in the injection molding industry is the hot runner injection mold. Compared with ordinary molds, the plastic products injected by the hot runner system are of higher quality, and the hot runner system has the advantages of saving raw materials, improving production efficiency, and a high degree of automation.

[0003] The hot runner system usually includes a hot nozzle with a flow channel and a valve needle in the flow channel. The valve needle is driven by a drive cylinder so that the valve needle can slide back and forth to close or open the flow channel. In order to smoothly inject the plastic material into the cavity, the material must be in a liquid state, and the hot nozzle must be kept at a certain high temperature to keep the material in a liquid state. The drive cylinder is located above the hot nozzle, and the high temperature of the hot nozzle will increase the temperature around the drive cylinder. In order to cool the drive cylinder, a water circulation system is usually set around the drive cylinder to achieve the purpose of cooling. However, such a setting makes the structure of the entire system very complicated and the cost is relatively high.

[0004] To solve the above problems, technicians conducted research and offset the drive cylinder relative to the hot nozzle. In the longitudinal direction, the drive cylinder was deviated from the hot nozzle. Although this solved the problem that the heat from the hot nozzle easily affects the drive cylinder, the structure is not stable and reliable enough. Summary of the invention

[0005] The object of the present invention is to provide a hot runner system and a control unit, so that the heat of the hot nozzle will not affect the driving cylinder, and the overall structure is more stable and reliable.

[0006] To achieve one of the above-mentioned objects, an embodiment of the present invention provides a hot runner system, the hot runner system comprising a hot nozzle provided with a flow channel, and a valve needle provided in the flow channel, the valve needle can be driven to slide to close or open the flow channel, wherein:

[0007] The hot runner system also includes a control unit, which includes a drive cylinder, a base fixed relative to the drive cylinder, and a rotating beam rotatably connected to the base via a rotating shaft. The drive cylinder has a cylinder body and a drive rod that can reciprocate in a straight line relative to the cylinder body, and the movement direction of the drive rod is parallel to the sliding direction of the valve needle. A pull rod is fixedly connected to the drive rod, and the pull rod is connected to the rotating beam via a connecting shaft. A valve needle cap is fixedly provided on the valve needle, and the valve needle cap is connected to the rotating beam via a valve needle shaft. The control unit also includes a reinforcement component connected to the rotating beam, and the reinforcement component extends through the base. When the rotating beam rotates relative to the base, the reinforcement component moves relative to the base.

[0008] As a further improvement of one embodiment of the present invention, the reinforcement components are provided in two, the first reinforcement component is closer to the valve needle shaft, the second reinforcement component is closer to the connecting shaft, and the second reinforcement component is closer to the rotating shaft than the first reinforcement component.

[0009] As a further improvement of one embodiment of the present invention, the reinforcement assembly includes a fastener passing through the rotating beam and a sleeve sleeved on the outer periphery of the fastener, and the base is provided with a through hole larger than the outer diameter of the sleeve, and the sleeve passes through the through hole.

[0010] As a further improvement of an embodiment of the present invention, the number of the rotating beams is two, and the two rotating beams are symmetrically arranged on both sides of the base.

[0011] As a further improvement of an embodiment of the present invention, in the moving direction of the driving rod, there is a certain distance between the base and the cylinder body.

[0012] As a further improvement of an embodiment of the present invention, a plurality of support pads are arranged between the base and the cylinder body.

[0013] As a further improvement of an embodiment of the present invention, the control unit further includes a blocking member fixedly arranged relative to the base.

[0014] As a further improvement of an embodiment of the present invention, the blocking member includes a fixing portion located between the base and the cylinder body and a blocking portion extending from the fixing portion to a portion of the outer periphery of the cylinder body.

[0015] As a further improvement of an embodiment of the present invention, in the moving direction of the driving rod, the fixing portion is in close contact with the base and is away from the cylinder body.

[0016] To achieve one of the above-mentioned purposes of the invention, an embodiment of the present invention further provides a control unit for a hot runner system, wherein the control unit is used to control the sliding of a valve needle, wherein the control unit includes a driving cylinder, a base fixed relative to the driving cylinder, and a rotating beam rotatably connected to the base via a rotating shaft, the driving cylinder having a cylinder body and a driving rod that can reciprocate in a straight line relative to the cylinder body, the movement direction of the driving rod is parallel to the sliding direction of the valve needle, a pull rod is fixedly connected to the driving rod, and the pull rod is connected to the rotating beam via a connecting shaft, a valve needle cap is fixedly provided on the valve needle, and the valve needle cap is connected to the rotating beam via a valve needle shaft, the control unit also includes a reinforcement component connected to the rotating beam, and the reinforcement component extends through the base, and when the rotating beam rotates relative to the base, the reinforcement component moves relative to the base.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the driving rod transmits the motion to the valve needle cap through the rotating beam to drive the valve needle to slide back and forth, so that the driving cylinder deviates from the hot nozzle, so that the heat of the hot nozzle does not affect the driving cylinder. In addition, due to the provision of a reinforcement component, when the driving rod drives the rotating beam to rotate, the reinforcement component is fixed relative to the rotating beam, and the reinforcement component moves relative to the base, so that the rotation of the rotating beam is more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional exploded schematic diagram of a hot runner system in a specific embodiment of the present invention;

[0019] Figure 2 yes Figure 1 The front view of the hot runner system;

[0020] Figure 3 yes Figure 1 Top view of the hot runner system;

[0021] Figure 4 yes Figure 3 Cross-sectional view of the hot runner system. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0023] In various drawings of the present application, for the convenience of illustration, some sizes of structures or parts are exaggerated relative to other structures or parts, and thus, are only used to illustrate the basic structure of the subject matter of the present application.

[0024] As used herein, terms indicating spatial relative positions such as "upper," "above," "lower," and "below" are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. Terms of spatial relative position may be intended to include different orientations of the device in use or operation in addition to the orientation shown in the drawings. For example, if the device in the figure is turned over, units described as being "below" or "beneath" other units or features will be located "above" the other units or features. Thus, the exemplary term "below" can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein interpreted accordingly.

[0025] like Figures 1 to 4As shown, a specific embodiment of the present invention provides a hot runner system, which includes a hot nozzle (not shown) provided with a flow channel and a valve needle (not shown) provided in the flow channel. The valve needle can be driven to slide to close or open the flow channel.

[0026] The hot runner system also includes a control unit, which includes a drive cylinder 10, a base 12 fixed relative to the drive cylinder 10, and a rotating beam 16 rotatably connected to the base 12 through a rotating shaft 14. The drive cylinder 10 has a cylinder body 18 and a drive rod 20 that can reciprocate in a straight line relative to the cylinder body 18. The movement direction of the drive rod 20 is parallel to the sliding direction of the valve needle. A pull rod 22 is fixedly connected to the drive rod 20, and the pull rod 22 is connected to the rotating beam 16 through a connecting shaft 24. A valve needle cap 26 is fixedly provided on the valve needle, and the valve needle cap 26 is connected to the rotating beam 16 through a valve needle shaft 28. The control unit also includes a reinforcement component 30 connected to the rotating beam 16, and the reinforcement component 30 extends through the base 12. When the rotating beam 16 rotates relative to the base 12, the reinforcement component 30 moves relative to the base 12.

[0027] In this preferred embodiment, the driving rod 20 transmits the motion to the valve needle cap 26 through the rotating beam 16 to drive the valve needle to slide back and forth, so that the driving cylinder 10 deviates from the hot nozzle, so that the heat of the hot nozzle does not affect the driving cylinder 10. In addition, due to the provision of the reinforcement component 30, when the driving rod 20 drives the rotating beam 16 to rotate, the reinforcement component 30 is fixed relative to the rotating beam 16, and the reinforcement component 30 moves relative to the base 12, so that the rotation of the rotating beam 16 is more stable and reliable.

[0028] Preferably, the driving cylinder 10 is an oil cylinder. Of course, the driving cylinder 10 can also be set as a gas cylinder.

[0029] Furthermore, the reinforcement component 30 may be fixedly arranged relative to the rotating beam 16. In addition, the reinforcement component 30 may also be rotatably arranged relative to the rotating beam 16.

[0030] Specifically, two reinforcement components 30 are provided, the first reinforcement component 30 is closer to the valve needle shaft 28 , the second reinforcement component 30 is closer to the connecting shaft 24 , and the second reinforcement component 30 is closer to the rotating shaft 14 than the first reinforcement component 30 .

[0031] Two rotating beams 16 are provided, and the two rotating beams 16 are symmetrically arranged on both sides of the base 12. The connecting shaft 24 and the valve needle shaft 28 both extend through the two rotating beams 16. The base 12 is provided with a first long hole 32 and a second long hole 34, both of which extend longitudinally along the moving direction of the driving rod 20, the connecting shaft 24 passes through the first long hole 32, and the valve needle shaft 28 passes through the second long hole 34.

[0032] The reinforcement assembly 30 includes a fastener 36 passing through the rotating beam 16, a sleeve 38 sleeved on the outer periphery of the fastener 36, and a lock nut 41 threadedly connected to the fastener 36. The base 12 is provided with a through hole 40 having an outer diameter larger than that of the sleeve 38, and the sleeve 38 passes through the through hole 40. Taking the installation of one of the reinforcement assemblies 30 as an example, the fastener 36 passes through one of the rotating beams 16 from one side, sleeved with the sleeve 58, and then passes through the through hole 40 on the base 12, and finally passes through the other rotating beam 16, and is matched with the lock nut 41, so that the rotating beams 16 on both sides are connected to the base 12.

[0033] In addition, there is a certain distance between the base 12 and the cylinder body 18 in the moving direction of the driving rod 20. Since the base 12 is close to the hot nozzle, the heat on the base 12 can be prevented from being transferred to the cylinder body 18.

[0034] A plurality of support pads 42 are provided between the base 12 and the cylinder body 18. Specifically, the support pads 42 are provided in four numbers, and four fixing bolts 44 fix the base 12 and the cylinder body 18 together, and the support pads 42 are hollow structures, and four fixing bolts 44 pass through the four support pads 42.

[0035] The control unit further includes a blocking member 46 fixedly disposed relative to the base 12. The blocking member 46 is used to block the heat of the hot nozzle from being transferred to the drive cylinder 10. Specifically, the blocking member 46 includes a fixing portion 48 located between the base 12 and the cylinder body 18 and a blocking portion 50 extending from the fixing portion 48 to a portion of the outer periphery of the cylinder body 18. In the moving direction of the drive rod 20, the blocking portion 50 protrudes from the lower end of the cylinder body 18, thereby achieving a better heat insulation effect.

[0036] In the moving direction of the driving rod 20, the fixing portion 48 is close to the base 12, and the fixing portion 48 is away from the cylinder body 18. Specifically, the blocking member 46 is installed between the support pad 42 and the base 12. Further, the fixing portion 48 is located between the support pad 42 and the base 12. The fixing portion 48 is provided with four mounting holes 52, and the four fixing bolts 44 pass through the cylinder body 18, the support pad 42, the mounting holes 52 and the base 12 in sequence.

[0037] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0038] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hot runner system, comprising a hot nozzle provided with a flow channel, and a valve needle provided in the flow channel, wherein the valve needle can be driven to slide to close or open the flow channel, characterized in that: The hot runner system also includes a control unit, the control unit includes a driving cylinder, a base fixed relative to the driving cylinder, a rotating beam rotatably connected to the base through a rotating shaft, two rotating beams are provided, and the two rotating beams are symmetrically arranged on both sides of the base, the driving cylinder has a cylinder body and a driving rod that can reciprocate along a straight line relative to the cylinder body, the movement direction of the driving rod is parallel to the sliding direction of the valve needle, a pull rod is fixedly connected to the driving rod, and the pull rod is connected to the rotating beam through a connecting shaft, a valve needle cap is fixedly provided on the valve needle, and the valve needle cap is connected to the rotating beam through a valve needle shaft, the control unit also includes a reinforcement component connected to the rotating beam, and the reinforcement component extends through the base, and when the rotating beam rotates relative to the base, the reinforcement component moves relative to the base; The reinforcement assembly includes a fastener passing through the rotating beam, a sleeve sleeved on the outer circumference of the fastener, and a lock nut threadedly connected to the fastener. A through hole larger than the outer diameter of the sleeve is provided on the base. The fastener is sleeved in the sleeve and passes through the rotating beam on one side of the base, the through hole, the rotating beam on the other side of the base in sequence and is connected to the lock nut.

2. The hot runner system according to claim 1, characterized in that: The number of the reinforcement components is two, the first reinforcement component is closer to the valve needle shaft, the second reinforcement component is closer to the connecting shaft, and the second reinforcement component is closer to the rotating shaft than the first reinforcement component.

3. The hot runner system according to claim 1, characterized in that: In the moving direction of the driving rod, there is a certain distance between the base and the cylinder body.

4. The hot runner system according to claim 1, characterized in that: A plurality of support pads are arranged between the base and the cylinder body.

5. The hot runner system according to claim 1, characterized in that: The control unit further comprises a blocking member which is fixedly arranged relative to the base.

6. The hot runner system according to claim 5, characterized in that: The blocking member includes a fixing portion located between the base and the cylinder body and a blocking portion extending from the fixing portion to a portion of the outer periphery of the cylinder body.

7. The hot runner system according to claim 6, characterized in that: In the moving direction of the driving rod, the fixing portion is in close contact with the base and is away from the cylinder body.

8. A control unit for a hot runner system, the control unit being used to control the sliding movement of a valve needle, characterized in that: The control unit includes a driving cylinder, a base fixed relative to the driving cylinder, a rotating beam rotatably connected to the base through a rotating shaft, two rotating beams are provided, and the two rotating beams are symmetrically arranged on both sides of the base, the driving cylinder has a cylinder body and a driving rod that can reciprocate in a straight line relative to the cylinder body, the movement direction of the driving rod is parallel to the sliding direction of the valve needle, a pull rod is fixedly connected to the driving rod, and the pull rod is connected to the rotating beam through a connecting shaft, a valve needle cap is fixedly provided on the valve needle, and the valve needle cap is connected to the rotating beam through the valve needle shaft, the control unit also includes a reinforcing component connected to the rotating beam, and the reinforcing component extends through the base, and when the rotating beam rotates relative to the base, the reinforcing component moves relative to the base; The reinforcement assembly includes a fastener passing through the rotating beam, a sleeve sleeved on the outer circumference of the fastener, and a lock nut threadedly connected to the fastener. A through hole larger than the outer diameter of the sleeve is provided on the base. The fastener is sleeved in the sleeve and passes through the rotating beam on one side of the base, the through hole, the rotating beam on the other side of the base in sequence and is connected to the lock nut.

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