Oil cylinder injection molding mechanism with connecting rod structure

Abstract

The utility model discloses an oil cylinder injection molding mechanism with a connecting rod structure, which is characterized in that a splitter plate is provided with a nozzle communicated with a runner of the splitter plate, an oil cylinder is connected with the splitter plate through a bracket, the bracket is provided with a guide groove vertically penetrating through a body of the bracket, a connecting rod is hinged on the bracket and positioned in the guide groove, one end of the connecting rod is hinged at the output end of the oil cylinder, and the other end of the connecting rod is connected with the oil cylinder. And a valve needle is movably connected to the other end of the nozzle and extends into the hot runner of the nozzle. The oil cylinder is arranged outside the splitter plate through the support, vertical movement of the oil cylinder is converted into vertical movement of the valve needle through rotation of the connecting rod, large space above the splitter plate cannot be occupied, large space cannot be occupied in the horizontal direction, the requirement for the point position distance is low, and the injection molding structure is more suitable for multi-point densely-arranged injection molding structures; and the driving power of the oil cylinder is strong and only acts on one valve needle, so that the loss of the driving force is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding devices, in particular to an oil cylinder injection molding mechanism with a connecting rod structure. Background Art

[0002] Hot runner cylinders are the primary power source for hot runner systems. They primarily transfer oil from the pump to the cylinders via valves, which in turn actuate the valve needles. Currently, some customers encounter multiple, densely packed locations during production, typically on manifolds. This creates significant pressure loss during production, making conventional cylinder pressure insufficient. Furthermore, existing hot runner cylinders are too large to be used.

[0003] In the prior art, such as a hot runner system and injection molding equipment with application number 202120473315.3, it is disclosed that the opening and closing components are installed through fixed components suspended on the diverter plate. It not only solves the technical problems such as direct contact between the opening and closing components and the diverter plate, but also has the characteristics of arranging the corresponding driving mechanism beside the diverter plate to achieve multi-point dense arrangement on the diverter plate. However, its lateral movement when driving the valve needle and its attached lateral arrangement mechanism will also affect the point arrangement. Utility Model Content

[0004] The purpose of the utility model is to provide an oil cylinder injection molding mechanism with a connecting rod structure, in which the oil cylinder is arranged outside the diverter plate through a bracket, and the vertical movement of the oil cylinder is converted into the vertical movement of the valve needle through the rotation of the connecting rod. It does not occupy a large space above the diverter plate, nor does it occupy a large space in the horizontal direction. It has low requirements on the point distance and is more suitable for injection molding structures with multiple points densely arranged. The oil cylinder driving power is strong and only acts on one valve needle, so there is no loss of driving force.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an oil cylinder injection molding mechanism with a connecting rod structure, comprising:

[0006] A diverter plate is provided with a nozzle connected to the flow channel.

[0007] The oil cylinder is connected to the diverter plate through a bracket, and the bracket is provided with a guide groove vertically passing through the body of the oil cylinder.

[0008] A connecting rod is hinged on the bracket and located in the guide groove. One end of the connecting rod is hinged to the output end of the oil cylinder, and the other end is movably connected to a valve needle, and the valve needle extends into the hot runner of the nozzle.

[0009] As a further optimization, a mounting hole is provided in the middle of the bracket, which horizontally passes through the body and the guide groove, and a hinge column is provided in the middle of the connecting rod, and the hinge column is rotatably arranged in the mounting hole.

[0010] As a further optimization, a transverse groove is provided at one end of the connecting rod, and a vertical groove connected to the transverse groove. The positioning part and the needle rod of the valve needle are respectively embedded in the transverse groove and the vertical groove. The transverse groove and the vertical groove form a connecting groove for movably positioning the upper end of the valve needle.

[0011] As a further optimization, the top wall and the bottom wall of the transverse groove respectively have an upper concave surface and a lower convex surface that abut against the upper end surface and the lower end surface of the positioning portion.

[0012] As a further optimization, a guide pressure surface is provided at the upper end of the positioning portion, which facilitates the abutment between the upper concave surface and the positioning portion when the valve needle is pressed downward.

[0013] As a further optimization, when the needle rod abuts against the inner wall of the vertical groove close to the oil cylinder, a clearance cavity is formed in the transverse groove to prevent the positioning part of the valve needle from being horizontally squeezed when the connecting rod rotates.

[0014] As a further optimization, a connecting column is provided at the output end of the oil cylinder, and the connecting column includes a wide column and a narrow column formed at the lower end of the wide column. The narrow column is arranged at the output end of the oil cylinder, and a slot is provided at one end of the connecting rod. The slot is nested on the narrow column and can rotate relative to the narrow column.

[0015] As a further optimization, the top and bottom ends of the slot side walls are respectively formed with abutment arc surfaces and yielding arc surfaces on both sides of the abutment arc surfaces, and the abutment arc surfaces are respectively abutted against the limiting steps at the upper and lower ends of the narrow column.

[0016] As a further optimization, the connecting rod has a Z-shaped structure, which is convenient for connection with the valve needle at the top position and the output end of the oil cylinder at a slightly lower position.

[0017] As a further optimization, the diverter plate and / or the nozzle is provided with a heating wire to ensure the fluidity of the molten material.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The oil cylinder is installed outside the manifold through a bracket. The vertical movement of the oil cylinder is converted into the vertical movement of the valve needle through the rotation of the connecting rod. It does not occupy a large space above the manifold, nor does it occupy a large space in the horizontal direction. It has a low requirement for the distance between points and is more suitable for injection molding structures with multiple points arranged densely.

[0020] 2. The cylinder driving power is strong and only acts on one valve needle, so there will be no loss of driving force, which can ensure the quality of injection molding;

[0021] 3. The connection structure between the two ends of the connecting rod and the valve needle and the oil cylinder is simple, which can realize open positioning and facilitate assembly and molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of the utility model.

[0023] Figure 2 This is a diagram of the installation structure of the valve needle, connecting rod and oil cylinder of the utility model.

[0024] Figure 3 This is a schematic diagram of the installation of the valve needle and connecting rod of the utility model.

[0025] Figure 4 This is a schematic diagram of the installation of the oil cylinder and connecting rod of the utility model.

[0026] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0027] Figure 6 This is an application diagram of the utility model. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] like Figures 1 to 4 As shown, a cylinder injection molding mechanism with a connecting rod structure includes a diverter plate 10, a nozzle 20, a bracket 30, a cylinder 40, a connecting rod 50 and a valve needle 60. The diverter plate 10 is provided with a nozzle 20 connected to its flow channel. The cylinder 40 is connected to the diverter plate 10 through the bracket 30. The bracket 30 is provided with a guide groove 300 vertically running through its body. The connecting rod 50 is hinged to the bracket 30 and is located in the guide groove 300. One end of the connecting rod 50 is hinged to the output end of the cylinder 40, and the other end is movably connected to the valve needle 60, which extends into the hot runner of the nozzle 20.

[0030] In the present invention, a single oil cylinder 40 controls only one valve needle 60 to move through the connecting rod 50. When molten material injection is not required, the oil cylinder 40 drives the connecting rod 50 to drive the valve needle 60 to block the discharge port of the nozzle 20. When molten material needs to be injected through the nozzle 20, the oil cylinder 40 drives the connecting rod 50 to rotate a certain angle along the vertical plane in the guide groove 300 to drive the valve needle 60 to move up a certain distance so that the molten material can be discharged through the nozzle 20.

[0031] Combine Figure 6 As shown, the utility model controls a valve needle 60 through an oil cylinder 40. The oil cylinder 40 is located beside the diverter plate 10 and is connected to the valve needle 60 through a rotatable connecting rod 50. The vertical movement of the output end of the oil cylinder 40 drives the connecting rod 50 to rotate to realize the vertical movement of the valve needle 60. On the one hand, it does not occupy a large space above the diverter plate 10. On the other hand, the vertical movement of the oil cylinder 40 makes the oil cylinder and its auxiliary structures not occupy a large space in the horizontal direction. Therefore, it has the characteristic of small space occupation and can be used according to the requirements of the injection molding product. When the distance between two or more adjacent injection points is relatively close and there is a relatively high requirement for the valve needle driving force of each injection point, that is, each cylinder body needs to drive a valve needle separately, the oil cylinder 40 and its mounting structure of the utility model have a more reasonable installation method and can be reasonably arranged on the separation plate 10, so the point distance requirement is lower, and it is more suitable for multi-point densely arranged injection molding structures; moreover, the oil cylinder driving power is strong and only acts on one valve needle, there will be no loss of driving force, thereby ensuring the quality of injection molding.

[0032] The specific structure and installation of the connecting rod 50 are as follows: the connecting rod 50 is a Z-shaped structure, and a hinge column 500 is installed in the fixing hole 501 set in the middle thereof. The middle part of the bracket 30 is provided with a mounting hole 301 horizontally passing through its body and the guide groove 300. The hinge column 500 is rotatably set in the mounting hole 301 to realize that the connecting rod 50 can rotate vertically in the guide groove 300.

[0033] First, for the connection between the connecting rod 50 and the valve needle 60, a movable connecting groove 51 is provided at one end of the connecting rod 50 to accommodate the upper end of the valve needle 60. The specific connecting groove 51 includes a horizontal groove 511 and a vertical groove 512. The horizontal groove 511 is horizontally arranged at the end of the connecting rod 50 to accommodate the positioning portion 62 of the valve needle 60. The vertical groove 512 is formed at the lower end of the horizontal groove 511 and is connected to the horizontal groove 511 to accommodate the needle rod 61 of the valve needle 60. The vertical projection surface of the vertical groove 512 is smaller than the vertical projection surface of the horizontal groove 511. In the above structure, only the upper end of the valve needle 60 is embedded in the connecting groove 51 to complete the installation of the valve needle 60 on the connecting rod 50. The specific principle is as follows: the valve needle 60 moves vertically in the nozzle 20 to open or close the nozzle 20. On the one hand, the vertical movement distance of the valve needle 60 is limited (it only needs to open and close the nozzle), and the up and down movement distance is small. On the other hand, the stability of the vertical movement of the valve needle 60 (whether radial deviation occurs) is guided by the nozzle 20. Therefore, the connecting rod 50 is movably connected to the upper end of the valve needle 60 only through the connecting groove 51. When the end of the connecting rod 50 with the connecting groove 51 is rotated (swinged) slightly, the valve needle 60 can be driven to move vertically, and the connection structure and installation method are simpler.

[0034] Preferably, the bottom wall and top wall of the transverse groove 511 respectively have a lower convex surface 51a and an upper concave surface 51b that abut against the lower end face and the upper end face of the positioning portion 62 of the valve needle 60. Under the premise that the lower convex surface 51a and the upper concave surface 51b can support and abut the positioning portion 62, the arc surface structure of the two can continuously abut against the positioning portion 62 when the connecting rod 50 rotates slightly to ensure the synchronization of movement, and the relative rotation of the connecting groove 51 and the positioning portion 62 can be achieved through the transition of the arc surface structure to ensure that the valve needle 60 can move in the vertical direction; preferably, the upper end of the positioning portion 62 is provided with a guide pressure surface 621, which also facilitates the connecting rod 50 to fully abut against the upper end of the positioning portion to apply pressure after rotating a certain angle.

[0035] Furthermore, when the needle rod 61 abuts against the inner wall of the vertical groove 512 close to the side of the cylinder 40, a clearance cavity 51c is formed in the transverse groove 511. The clearance cavity 51c can prevent the inner side wall of the transverse groove 511 from abutting against the side wall of the positioning portion 62 and squeezing it laterally when the connecting rod 50 rotates, thereby effectively ensuring the vertical movement of the valve needle 60.

[0036] Secondly, for the connection between the connecting rod 50 and the oil cylinder 40, Figure 5 As shown, the output end of the oil cylinder 40 is provided with a connecting column 41, which includes a wide column 411 and a narrow column 412 formed at the lower end of the wide column 411. The narrow column 412 is arranged at the output end of the oil cylinder 40 (such as by threaded connection, etc.), and one end of the connecting rod 50 is provided with a slot 52, which is nested in the narrow column 412 and can rotate relative to the narrow column 412. The connection principle is the same as the connection principle between the connecting rod 50 and the valve needle 60. Both are open movable connections, and only the position of the connecting rod 50 is limited.

[0037] Preferably, the top and bottom ends of the side walls of the slot 52 are respectively formed with abutment arc surfaces 52a and yielding arc surfaces 52b located on both sides of the abutment arc surfaces 52a. The abutment arc surfaces 52a are respectively abutted against the limiting steps formed at the upper and lower ends of the narrow column 412. On the basis of ensuring the abutment, the vertical movement of the output end of the cylinder 40 can be converted into the rotation of the connecting rod 50 through the yielding and guiding effects of the yielding arc surfaces 52b.

[0038] In addition, the manifold 10 and / or the nozzle 20 are provided with a heating wire 70 to ensure the fluidity of the molten material therein.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A cylinder injection molding mechanism with a connecting rod structure, characterized in that: include: A diverter plate is provided with a nozzle connected to the flow channel. The oil cylinder is connected to the diverter plate through a bracket, and the bracket is provided with a guide groove vertically passing through the body of the oil cylinder. A connecting rod is hinged on the bracket and located in the guide groove. One end of the connecting rod is hinged to the output end of the oil cylinder, and the other end is movably connected to a valve needle, and the valve needle extends into the hot runner of the nozzle.

2. The oil cylinder injection molding mechanism with a connecting rod structure according to claim 1, characterized in that: A mounting hole is provided in the middle of the bracket and runs through the body and the guide groove horizontally. A hinge column is provided in the middle of the connecting rod. The hinge column is rotatably arranged in the mounting hole.

3. The oil cylinder injection molding mechanism with a connecting rod structure according to claim 1, characterized in that: One end of the connecting rod is provided with a transverse groove and a vertical groove communicated with the transverse groove, and the positioning portion and the needle rod of the valve needle are respectively embedded in the transverse groove and the vertical groove.

4. The oil cylinder injection molding mechanism with a connecting rod structure according to claim 3, characterized in that: The top wall and the bottom wall of the transverse groove respectively have an upper concave surface and a lower convex surface that abut against the upper end surface and the lower end surface of the positioning portion.

5. The oil cylinder injection molding mechanism with a connecting rod structure according to claim 4, characterized in that: The upper end of the positioning portion is provided with a guide pressing surface.

6. The oil cylinder injection molding mechanism with a connecting rod structure according to claim 3, 4 or 5, characterized in that: When the needle rod abuts against the inner wall of the vertical groove close to the oil cylinder, a clearance cavity is formed in the transverse groove.

7. The oil cylinder injection molding mechanism with a connecting rod structure according to claim 1 or 3, characterized in that: A connecting column is provided at the output end of the oil cylinder, and the connecting column includes a wide column and a narrow column formed at the lower end of the wide column. The narrow column is arranged at the output end of the oil cylinder, and a slot is provided at one end of the connecting rod. The slot is nested in the narrow column and can rotate relative to the narrow column.

8. The oil cylinder injection molding mechanism with a connecting rod structure according to claim 7, characterized in that: The top and bottom ends of the slot side walls are respectively formed with abutting arc surfaces and yielding arc surfaces on both sides of the abutting arc surfaces, and the abutting arc surfaces are respectively abutted against the limiting steps at the upper and lower ends of the narrow column.

9. The oil cylinder injection molding mechanism with a connecting rod structure according to claim 1, characterized in that: The connecting rod is in a Z-shaped structure.

10. The oil cylinder injection molding mechanism with a connecting rod structure according to claim 1, characterized in that: The diverter plate and / or the nozzle are provided with a heating wire.

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