Floating and rotating demoulding mechanism for UT (under test) tube

Abstract

The utility model relates to the technical field of injection molding, in particular to a UT tube floating rotary demolding mechanism which comprises an ejector plate, a rotating shaft and a guide shaft are arranged on the ejector plate, the top of the rotating shaft is fixedly connected with a rotating plate, a bent core is arranged at the top of the guide shaft, the bent core is provided with a bent arc section, and the rotating plate is located on the inner side of the bent arc section. The overall height of the UT tube injection mold is reduced, and the ejector plate is easy to assemble and convenient to maintain in the later period.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a floating and rotating demolding mechanism for UT tubes. Background Technology

[0002] UT pipes are a type of drainage pipe fitting with an arc-shaped bend, serving to prevent odors in the sewer system. Due to the relatively complex structure of UT pipes, their injection molding molds are also complex, making mold processing difficult and assembly cumbersome. Currently, there are many demolding methods for UT pipe injection molding molds, the most common being the use of a rotating plate to peel the UT pipe from the bend core. During mold assembly, the precise relative positions of the rotating plate and the bend core need to be determined, making the mold fitting process quite complicated.

[0003] For example, Chinese patent CN201456353U discloses a demolding structure for a 180° bent pipe injection mold, including a moving mold core and a lower cavity located in a fixed mold. The moving mold core is divided into four parts: a threaded core located at the rear inlet of the bent pipe, an inner core located inside the bent pipe with a half-exit, a half-open core corresponding to the inner core with only a half-exit, and a full-open core located at the other end of the bent pipe. The threaded core is positioned on a rotating connecting rod that can move longitudinally and rotate on its own axis. The inner core is set on a transverse sliding block located on the fixed mold, and the half-open core and the full-open core are set together on a longitudinal sliding block located on the fixed mold. A rotating shaft that can drive the lower cavity to rotate synchronously is connected to the center. The demolding structure described above has low production efficiency. Currently, UT pipe injection molds often use a rotating plate in conjunction with a bent core to peel and form UT pipes, but this structure results in a relatively high overall mold height. Utility Model Content

[0004] To address the problems of high overall height, heavy weight, difficult assembly, and challenging maintenance of existing UT tube injection molds, this utility model proposes a floating rotary demolding mechanism for UT tubes. This mechanism reduces the overall height of the mold, simplifies the ejector plate structure, makes assembly easier, and facilitates subsequent maintenance.

[0005] To achieve the above technical effects, this utility model proposes a floating rotary demolding mechanism for UT tubes, including an ejector plate, a rotating shaft and a guide shaft on the ejector plate, a rotating plate fixedly connected to the top of the rotating shaft, a bending core on the top of the guide shaft, the bending core having a curved segment, and the rotating plate located inside the curved segment.

[0006] The rotating plate and guide shaft move synchronously driven by the ejector plate. During the demolding process of the UT tube, the rotating plate and the bending core can extend out of the lower mold at the same time to demold the UT tube.

[0007] It also includes a base and a main body, which are connected by a number of guide rods. The ejector plate is slidably connected to the guide rods, and the rotating shaft and the guide shaft pass through the main body.

[0008] The base is provided with a lifting hole, and the ejector plate and the base mating surface are provided with a lifting shaft, which passes through the lifting hole.

[0009] A rotating gear is fixedly connected to the guide shaft, and a rotating drive assembly is provided on the base. The rotating drive assembly has a rack, which meshes with the rotating gear.

[0010] The main body has a parting block groove, a parting block is fixedly connected in the parting block groove, the rotating shaft passes through the parting block, and a rotating plate placement groove is provided on the surface of the parting block, the shape of the rotating plate placement groove is set to correspond to the shape of the rotating plate.

[0011] The rotating shaft is provided with a ball bearing guide sleeve, which is disposed between the main body and the parting block, and is located between the rotating plate and the rotating gear.

[0012] The rotating plate has an arc surface, which is correspondingly arranged with the arc surface of the bent core.

[0013] The main body is provided with a flared inward shrinking component and a core component, and the end shapes of the flared inward shrinking component and the core component are respectively set to correspond to the shape of the curved core.

[0014] The main body is provided with a flared inward shrinking component and a core component, and the end shapes of the flared inward shrinking component and the core component are respectively set to correspond to the shape of the curved core.

[0015] The beneficial effects of this utility model are:

[0016] The ejector plate is located between the base and the main body, which reduces the overall height of the mold, simplifies the processing and assembly of the ejector plate, and reduces the later maintenance cost; the ball guide sleeve positions the rotating shaft to ensure the extension and rotation of the rotating shaft; the rotating plate placement slot provides an independent placement space for the rotating plate, avoiding friction and collision between the rotating plate and other components. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the floating and rotating demolding mechanism for the UT tube in Example 1.

[0018] Figure 2 This is a schematic diagram of the floating and rotating demolding mechanism for the UT tube in Example 2.

[0019] Figure 3 This is a schematic diagram of the lifting shaft and lifting hole.

[0020] Figure 4 This is a schematic diagram of the floating and rotating demolding mechanism for the UT tube in Example 3.

[0021] Icon labels:

[0022] 1. Ejector plate; 2. Base; 3. Main body; 4. Flaring and retracting assembly; 5. Core assembly; 6. Telescopic cylinder;

[0023] 11. Rotating shaft; 12. Guide shaft; 13. Rotating plate; 14. Bending core; 15. Bending arc segment; 16. Lifting shaft; 17. Rotating gear; 18. Ball bearing guide sleeve; 21. Guide rod; 22. Lifting hole; 23. Rotary drive assembly; 24. Rack; 31. Parting block slot; 32. Parting block; 33. Rotating plate placement slot; Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0025] This utility model provides a floating and rotating demolding mechanism for UT tubes. The preferred embodiments of the floating and rotating demolding mechanism for UT tubes are described below.

[0026] Example 1

[0027] Refer to the attached diagram. Figure 1 In this embodiment, the UT tube floating rotation demolding mechanism includes an ejector plate 1 as a carrier. The ejector plate 1 has several through holes and stepped holes for inserting other components or for fixing other components through the through holes. The ejector plate 1 has a rotating shaft 11 and a guide shaft 12, both of which are perpendicular to and fixedly connected to the ejector plate 1. The rotating shaft 11 is a stepped shaft with three outer diameters that gradually change from one end to the other. The end with the largest outer diameter is fixedly connected to the ejector plate 1, and the cross-sectional shape of the largest outer diameter section is capsule-like, which facilitates the fixing of other components. A rotating plate 13 is provided at the end of the smallest outer diameter section of the rotating shaft 11. The rotating plate 13 has an arc surface structure. The guide shaft 12 is a columnar structure with a rounded square cross-section. One end is fixedly connected to the ejector plate 1, and the other end is fixedly connected to a bending core. The bending core has a curved section 15. During the injection molding of the UT tube, the curved section 15 cooperates with the upper and lower molds to integrally form the UT tube. Figure 2 As shown, the rotating plate 13 is located inside the curved end. After injection molding is completed, the rotating shaft 11 drives the rotating plate 13 to peel the molded UT from the curved core. The rotating plate 13 has an arc surface corresponding to the surface of the curved end, which ensures that the curved core is not damaged while peeling the molded UT tube.

[0028] In this embodiment, the floating rotary demolding mechanism for UT tubes relies on the ejector plate 1 to drive the rotating shaft 11 and the guide shaft 12 to achieve overall movement. During the demolding process after the UT tube is formed, the ejector plate 1 can be driven to move along the length of the guide shaft 12 by an external device, so that the bent core and the rotating plate 13 are separated from the lower mold of the UT tube injection molding mold. The formed UT tube is peeled off by the rotation of the rotating plate 13. Then, the rotating shaft 11 and the guide shaft 12 are driven back to their original positions by the fixed plate, thus completing the injection and demolding process of a UT tube.

[0029] The floating rotary demolding mechanism for UT tubes in this example is not a complex improvement over existing technologies. It allows for setting the lengths of the rotating shaft 11 and guide shaft 12 to place the ejector plate 1 in a lower position inside the mold, reducing the overall height of the mold and lowering the assembly difficulty. Furthermore, placing the rotating shaft 11 through the lower mold reduces the mold fitting steps, making the overall mold more aesthetically pleasing.

[0030] Example 2

[0031] Refer to the attached diagram. Figures 1 to 4This embodiment includes the specific setup described in Embodiment 1, and also includes a base 2 and a main body 3. Several guide rods 21 are provided between the base 2 and the main body 3, and the two are fixedly connected by the guide rods 21. The base 2 and the main body 3 are arranged in parallel. The base 2 has several through holes and stepped holes for inserting the guide rods 21 or bolts for connecting with other components. Two support plates are provided on both sides of the base 2, and bolts are inserted into the support plates to fix the base 2 and the main body 3. Several through holes or stepped holes are provided on the ejector plate 1 for inserting the guide rods 21 or connecting bolts. The base 2 has a lifting hole 22, and the ejector plate 1 has a lifting shaft 16 that mates with the lifting hole 22. The lifting shaft 16 passes through the lifting hole 22 and is connected to an external device and lifted... Shaft 16 enables the ejector plate 1 to move along the length of guide rod 21; a rotating gear 17 is threaded through and fixedly connected to the rotating shaft 11, the rotating gear 17 is fixedly connected to the maximum outer diameter end of the rotating shaft 11, and is located at the step between the maximum outer diameter end and the adjacent different outer diameter ends. At the same time, a rotating drive assembly 23 is provided on the base 2, the rotating drive assembly 23 has a rack 24, the rack 24 meshes with the rotating gear 17 for transmission, and the rotation of the rotating shaft 11 is controlled by the axial extension and retraction movement of the telescopic cylinder 6 connected to the rack 24, which drives the rotating plate 13 to rotate. After the UT tube is injection molded, the UT tube is peeled off by the rotation of the rotating plate 13; at the initial position of the ejector plate 1, the rotating gear 17 is lower than the rack 24, this setting can ensure that when the ejector plate 1 is in the position of the ejector plate 1, the rotating gear 17 is lower than the rack 24. When the rotating shaft 11 and guide shaft 12 are raised, the rotating gear 17 and rack 24 can mesh; in conjunction with the lifting movement of the ejector plate 1, the rotating plate 13 and the bent core are raised in one go, and the rotating plate 13 rotates to peel off the UT tube; the main body 3 is connected to the base 2 through the support plate and guide rod 21, and the rotating shaft 11 and guide shaft 12 are inserted into the main body 3; the two ends of the through hole through which the guide shaft 12 is inserted into the main body 3 are provided with fixing sleeves, the function of which is to make the lifting and lowering process of the guide shaft 12 more stable and to prevent friction damage with the main body 3; the main body 3 has a parting block groove 31, and a parting block 32 is fixedly connected in the parting block groove 31. The end face of the parting block 32 away from the main body 3 is the parting surface, and the parting surface is provided with a lower mold groove corresponding to the bent core, and the bent core and the lower mold groove are inserted into the parting surface. The mold grooves are correspondingly set; a ball bearing guide sleeve 18 is provided on the rotating shaft 11, and the ball bearing guide sleeve 18 is located between the rotating gear 17 and the rotating plate 13. Grooves for setting the ball bearing guide sleeve 18 are provided on the parting block groove 31 and on the end face of the parting block 32 that contacts the parting block groove 31. The purpose of this setting is to use the ball bearing guide sleeve 18 to position the rotating shaft 11 and avoid friction damage between it and the main body 3 or the parting block 32; a rotating plate placement groove 33 is provided on the parting surface. At the initial position of the ejector plate 1, the rotating plate 13 enters the rotating plate placement groove 33 and does not contact the rotating plate placement groove 33, or the rotating plate 13 does not contact the rotating plate placement groove 33, but is only stored in the rotating plate placement groove 33. This setting can make the mold more aesthetically pleasing as a whole.

[0032] In this embodiment, the rotation of the rotating shaft 11 is achieved by a rotary drive mechanism, and the lifting hole 22 and the lifting shaft 16 are used to drive the rotating shaft 11 and the guide shaft 12 to be lifted synchronously. The ball bearing guide sleeve 18 is used to make the rotation and extension of the rotating shaft 11 more stable, ensuring that the rotating plate 13 enters the rotating plate placement groove 33 and avoids friction damage with the main body 3 or the parting block 32.

[0033] Example 3

[0034] To address the difficulties in assembling existing UT tube injection molding molds, their high overall height, and the cumbersome fitting process, this embodiment proposes a demolding structure that reduces the overall mold height, separates the rotating plate from the bending core side, allows it to be stored in an independent groove, and uses ball bearing guides to position the rotating shaft, resulting in more stable rotation of the rotating shaft. (Refer to the attached drawings.) Figures 1 to 4 The floating rotary demolding mechanism for UT tubes in this embodiment includes an ejector plate 1, on which a rotating shaft 11 and a guide shaft 12 are provided. A rotating plate 13 is fixedly connected to the top of the rotating shaft 11, and a bent core is provided at the top of the guide shaft 12. The bent core has a curved section 15, and the rotating plate 13 is located inside the curved section 15. The rotating plate 13 has an arc surface, which corresponds to the arc surface of the bent core. Both the rotating shaft 11 and the guide shaft 12 are perpendicular to the ejector plate 1, and the ejector plate 1 can drive the rotating shaft 11 and the guide shaft 12. The shaft 12 moves synchronously; this embodiment also includes a base 2 and a main body 3, which are connected by several guide rods 21. The ejector plate 1 is slidably connected to the guide rods 21, and the rotating shaft 11 and the guide shaft 12 are inserted into the main body 3. The guide rods 21 are used to guide the lifting movement of the ejector plate 1. The base 2 is provided with a lifting hole 22, and the ejector plate 1 and the base 2 are provided with a lifting shaft 16. The lifting shaft 16 is inserted into the lifting hole 22. The lifting and lowering movement of the ejector plate 1 is realized through an external device.

[0035] Furthermore, a rotating gear 17 is fixedly connected to the guide shaft 12, and a rotating drive assembly 23 is provided on the base 2. The rotating drive assembly 23 has a rack 24, which meshes with the rotating gear 17. The rotating drive assembly 23 has a telescopic cylinder 6, which is fixedly connected to the rack 24. The telescopic movement of the telescopic cylinder 6 drives the rack 24 to mesh with the rotating gear 17, thereby controlling the rotating shaft 11 to drive the rotating plate 13 to rotate. The main body 3 has a parting block groove 31, and a parting block 32 is fixedly connected in the parting block groove 31. The rotating shaft 11 passes through the parting block 32. The surface of the parting block 32 is provided with a rotating plate placement groove 33 for placing the rotating plate. The shape of the groove 33 corresponds to the shape of the rotating plate 13. When the ejector plate 1 descends to the initial position, the rotation drive assembly 23 needs to be controlled to retract the rack 24 to the maximum position to ensure that the rotating plate 13 is in the initial state, enters the rotating plate placement groove 33 and does not contact the rotating plate placement groove 33. A ball guide sleeve 18 is provided on the rotating shaft 11. The ball guide sleeve 18 is located between the main body 3 and the parting block 32, and between the rotating plate 13 and the rotating gear 17. The ball guide sleeve 18 is used to limit the position of the rotating shaft 11, stabilize the rotating shaft 11, and ensure that the rotating shaft 11 will not be damaged by friction with the main body 3 or the parting block 32.

[0036] In this embodiment, the main body 3 is provided with a flared inner shrinking component 4 and a core component 5. The end shapes of the flared inner shrinking component 4 and the core component 5 are respectively set to correspond to the shape of the curved core. The ends of the flared inner shrinking component 4 and the core component 5 respectively cooperate with the two ends of the curved arc segment 15 of the curved core, forming the two ends of the UT tube during the injection molding process. The shapes of the ends of the two components correspond to the shape of the curved core. The ends of the flared inner shrinking component and the core component 5 respectively cooperate with the curved core to form a smooth transition surface. The flared inner shrinking component 4 and the core component 5 are both equipped with a telescopic cylinder 6. Through the telescopic cylinder 6, the flared inner shrinking component 4 and the core component 5 can contact and separate from the curved core.

[0037] The working process of the UT tube floating rotary demolding mechanism in this embodiment is as follows:

[0038] In the initial position, the ejector plate 1 is close to the base 2, the rotary drive mechanism is in its maximum retracted position, the rotary plate 13 is located in the rotary plate placement groove 33, and the bent core is located in the lower mold groove. Driven by the telescopic cylinder 6, the flaring and shrinking assembly 4 and the core assembly 5 are respectively in contact with the bent core at their ends. The upper and lower molds are engaged, and the injection molding machine injects molding material into the molding cavity. After the UT tube is formed, the upper mold separates, and the flaring and shrinking assembly 4 and the core assembly 5 are respectively separated from the bent core by the telescopic cylinder 6. After separation... The ejector plate 1 is raised by an external device, and the rotating plate 13 and the bent core rise synchronously and detach from the parting block 32. After the lifting is completed, the rotary drive assembly 23 extends through the telescopic cylinder 6 to drive the rack 24 to mesh with the gear, and the rotating shaft 11 drives the rotating plate 13 to rotate. In the top view, the rotating plate 13 rotates clockwise and peels the UT tube along the curved section 15 of the bent core. After the peeling is completed, the telescopic cylinder 6 of the rotary drive assembly 23 retracts, the ejector plate 1 descends back to the initial position, and the rotating plate 13 and the bent core return to the initial position.

[0039] The floating demolding mechanism for the UT tube in this embodiment can realize the rotation and extension functions of the rotating shaft 11. The ejector plate 1 enables the synchronous lifting or lowering of the rotating plate 13 and the bending core, allowing for individual demolding of the UT tube without damaging the parting block 32. The ball bearing guide sleeve 18 is used to position the rotating shaft 11, ensuring smooth rotation without friction damage to the main body 3 or the parting block 32. The rotating plate 13 is placed in the rotating plate placement groove 33, which can avoid collisions between the upper and lower molds and is also aesthetically pleasing. The overall height of the mold is reduced, simplifying the assembly and fitting process, which is of practical significance.

[0040] The above description is a preferred embodiment of the present utility model, used to illustrate the specific structure and function of the present utility model. It should be noted that, without departing from the principle of the present utility model, those skilled in the art can make foreseeable improvements and modifications to the present utility model, and these improvements and modifications are also within the protection scope of the present utility model.

Claims

1. A UT tube floating rotary demolding mechanism, characterized by, The top pin plate is provided with a rotating shaft and a guide shaft, the rotating shaft is fixedly connected with a rotating plate at the top, the guide shaft is provided with a bent core at the top, the bent core has a bent arc segment, and the rotating plate is located inside the bent arc segment.

2. A UT tube floating rotary demolding mechanism according to claim 1, characterized in that, The base and the main body are connected through a plurality of guide rods, the top pin plate is slidingly connected on the guide rods, and the rotating shaft and the guide shaft are arranged in the main body.

3. A UT tube floating rotary demolding mechanism according to claim 2, characterized in that, The base is provided with a lifting hole, the top pin plate is provided with a lifting shaft on the matching surface of the base, and the lifting shaft is arranged in the lifting hole.

4. A UT tube floating rotary demolding mechanism according to claim 2, characterized in that, The guide shaft is fixedly connected with a rotating gear, the base is provided with a rotating drive assembly, the rotating drive assembly has a rack, and the rack is engaged with the rotating gear.

5. A UT tube floating rotary demolding mechanism according to claim 4, characterized in that, The main body has a split block groove, the split block groove is fixedly connected with a split block, the rotating shaft is arranged in the split block, the surface of the split block is provided with a rotating plate placing groove, and the shape of the rotating plate placing groove corresponds to the shape of the rotating plate.

6. A UT tube floating rotary demolding mechanism according to claim 5, characterized in that, The rotating shaft is provided with a ball guide sleeve, the ball guide sleeve is arranged between the main body and the split block, and the ball guide sleeve is located between the rotating plate and the rotating gear.

7. A UT tube floating rotary demolding mechanism according to claim 1, characterized in that, The rotating plate has a circular arc surface, and the circular arc surface corresponds to the circular arc surface of the bent core.

8. A floating rotary stripper mechanism for a UT tube as defined in any one of claims 2 to 6, characterized in that The main body is provided with an expanding and shrinking assembly and a core assembly, and the shapes of the ends of the expanding and shrinking assembly and the core assembly correspond to the shape of the bent core.

9. A UT tube floating rotary demolding mechanism according to claim 8, characterized in that, The expanding and shrinking assembly and the core assembly are both provided with telescopic cylinders.

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