Pipe product demolding method and device

Abstract

The invention relates to the technical field of post-processing equipment of mold forming products, in particular to a pipe product demolding method and device. The pipe product demolding method comprises the following steps: positioning a mold after pipe product molding; the mold pipe and the pipe product are blocked at one end of the mold, the end face of the mold mandrel is pushed at the other end of the mold, the mold pipe and the pipe product cannot axially move, and the mold mandrel axially moves relative to the mold pipe and the pipe product until the mold mandrel is separated from the mold pipe and the pipe product; and then one end of the mold pipe is blocked, the end face of the pipe product is pushed at the other end of the mold pipe, the mold pipe cannot move axially, and the pipe product moves axially relative to the mold pipe until the pipe product is separated. The demolding mode does not damage the pipe product and the mold, operation steps are closely connected, and demolding operation of the pipe product and the mold pipe and the mold mandrel of the mold can be efficiently completed.

Description

Technical Field

[0001] The present invention relates to the technical field of post-processing equipment for molded products, and in particular to a demoulding method and device for pipe products. Background Art

[0002] Insulating rods are components used in GIS equipment for support, disconnection, and electrical insulation. They are hollow tubes and are typically cast using epoxy resin. The mold used for molding consists of a mold cavity and a mold mandrel. Epoxy resin is poured into the annular gap between the mold cavity and the mold mandrel, and after curing, the tube product is formed. After curing, the mold mandrel is located in the hollow portion of the tube product. Demolding requires overcoming adhesion, adsorption, and shrinkage stress between the tube product and the mold. Adhesion is generated after the resin matrix and the mold surface are cured. Adsorption is generated under atmospheric pressure due to the near-vacuum state within the mold interface before casting. Shrinkage stress is caused by the cooling and shrinkage of the material after the insulating rod product is molded, which may generate certain shrinkage stresses. Due to the structural characteristics of the insulating rod product, the mold mandrel has a uniform diameter and no demolding slope. A demolding machine is required during the demolding stage to achieve demolding.

[0003] A conventional demolding machine, as disclosed in Chinese invention patent application publication number CN117901316A, comprises a re-mold bracket, a traction bracket, and a stripper plate. A load-bearing traction plate is slidably connected to the traction bracket, and a core mold joint is provided on the load-bearing traction plate. The stripper plate is positioned between the traction bracket and the re-mold bracket. The piston rod of the hydraulic system flexibly extends through the stripper plate and is fixedly connected to the load-bearing traction plate. During demolding preparation, the actuator system retracts the piston rod, positioning the load-bearing traction plate at the end of the traction bracket near the stripper plate. The launch tube (pipeline product) is mounted on one side of the re-mold bracket, with the stripper end resting against the stripper plate. The stripper plate has a perforation for the core mold. The end of the core mold is secured to the core mold joint on the load-bearing traction plate. During demolding, the actuator system is activated, and the actuator system's piston rod gradually extends, driving the load-bearing traction plate to move. As the load-bearing traction plate moves, the actuator system's thrust is converted into traction force, driving the core mold out of the barrel. When the piston rod is fully extended, the core mold is completely removed from the cylinder body, completing the demoulding operation.

[0004] The aforementioned demolding machine is used to remove the mold mandrel from the tubular product. This method is suitable for split cavities. After the tubular product is formed, the upper and lower molds are opened to remove the tubular product and the mold mandrel from the cavity. The product is then placed on the demolding machine and the mandrel is pulled relative to the product to achieve demolding. However, for tubular products made of composite materials, such as insulating tie rods, the mold cavity is a one-piece tubular structure, namely the mold tube, which cooperates with the mold mandrel within it to form the tubular product. For such molds, using the aforementioned demolding machine to pull the mold mandrel can disengage the mandrel, but it cannot pull the tubular product out of the mold tube, making it difficult to apply. Summary of the Invention

[0005] The object of the present invention is to provide a method for demoulding a pipe product to solve the problem that the current demoulding machine is not suitable for smoothly demoulding a pipe product formed by using a mold tube and a mold core shaft; the object of the present invention is also to provide a device for demoulding a pipe product to solve the above problem.

[0006] The technical solution of the method for demoulding a pipe product of the present invention is: A method for demolding a pipe product comprises: positioning a mold after the pipe product is formed; first, blocking the mold tube and the pipe product at one end of the mold, and pushing the end face of the mold core shaft at the other end of the mold, so that the mold tube and the pipe product cannot move axially, and the mold core shaft moves axially relative to the mold tube and the pipe product until they are separated; then, blocking one end of the mold tube, and pushing the end face of the pipe product at the other end of the mold tube, so that the mold tube cannot move axially, and the pipe product moves axially relative to the mold tube until it is separated.

[0007] Furthermore, the driving rod of the pushing mechanism is used to form a pushing force on the mold core shaft or the pipe product. When the diameter of the driving rod of the pushing mechanism is larger than the diameter of the mold core shaft, a push rod is first connected to the end of the driving rod. The length of the push rod is smaller than the length of the mold core shaft, and the diameter of the push rod is smaller than the diameter of the mold core shaft. The driving rod is extended and pushes the mold core shaft through the push rod. After a certain pushing stroke, the driving rod retracts with the push rod, and then the push rod is disassembled from the driving rod, and a new push rod is connected between the push rod and the driving rod. Then the driving rod is extended and the mold core shaft is pushed through the push rod. The above process is repeated until the mold core shaft is completely ejected.

[0008] Beneficial effects: The present invention innovatively provides a demoulding method suitable for separating a pipe product from a mold tube and a mold core shaft. First, the mold tube and the pipe product are blocked at one end without blocking the mold core shaft. Instead, the end face of the mold core shaft is pushed at the other end. Since the mold tube and the pipe product cannot move axially, the mold core shaft moves relatively under the action of the pushing force and extends out of the mold tube and the pipe product until the mold core shaft separates from the mold tube and the pipe product. Then, the mold tube is blocked at one end without blocking the pipe product. Instead, the end face of the pipe product is pushed at the other end. Since the mold tube cannot move axially, the pipe product moves relatively under the action of the pushing force and extends out of the mold tube until the pipe product separates from the mold tube, thereby completing demoulding. This demoulding method will not damage the pipe product and the mold. The operation steps are closely connected, and the demoulding operation of the pipe product from the mold tube and the mold core shaft of the mold can be completed efficiently.

[0009] The technical solution of the pipe product demoulding device of the present invention is: A pipe product demoulding device includes a positioning mechanism and a pushing mechanism. The positioning mechanism is used to position a mold after the pipe product is formed but not demoulded. The positioning mechanism includes a blocking plate for forming a stop with the mold tube and the end face of the pipe product of the mold to allow the mold core shaft to be cleared, and a blocking plate for blocking the end face of the mold tube to allow the pipe product to be cleared. The pipe product demoulding device also includes a core shaft pushing structure and a product pushing structure connected to the pushing mechanism when in use. The core shaft pushing structure is used to push the mold core shaft end face on the other side when the corresponding blocking plate blocks the mold tube and the pipe product on one side, thereby separating the mold core shaft from the mold tube and the pipe product. The product pushing structure is used to push the pipe product end face on the other side when the corresponding blocking plate blocks the mold tube on one side, thereby separating the pipe product from the mold tube.

[0010] Furthermore, the positioning mechanism includes a movable support and a fixed support, the retaining plate is mounted on the fixed support, and a space for clamping the mold is formed between the movable support and the fixed support so that the movable support moves toward the fixed support to axially clamp the mold tube.

[0011] Furthermore, the retaining plate has a positioning groove for fitting on one end of the mold tube, and the movable support is provided with a positioning structure, and the positioning structure has a positioning groove for fitting on the other end of the mold tube.

[0012] Furthermore, the positioning structure is a positioning template that is detachably mounted on the movable support.

[0013] Furthermore, the pushing mechanism includes a telescopic cylinder, the telescopic rod of the telescopic cylinder is a driving rod for forming a pushing force on the mold core shaft and the pipe product, and the positioning mechanism includes a positioning support fixed to the cylinder body of the telescopic cylinder and a fixed support for installing the blocking template. The fixed support and the positioning support are connected by a positioning connecting rod, and the positioning support is provided with an avoidance channel for avoiding the telescopic rod of the telescopic cylinder.

[0014] Furthermore, the retaining plate has a central hole for allowing the mold core shaft or the pipe product to pass through, and a liner is embedded in the hole wall of the central hole of the retaining plate. The hardness of the liner is less than the hardness of the retaining plate body.

[0015] Furthermore, the tube product demoulding device further comprises a receiving seat located on the side of the positioning mechanism facing away from the ejecting mechanism, and the receiving seat has a receiving groove for receiving the ejected mold core shaft and the tube product.

[0016] Furthermore, the tube product demoulding device also includes a lifting mechanism for driving the receiving seat to rise and fall to adapt to adjusting the height of the receiving groove relative to the mold core shaft and the tube product when being ejected.

[0017] Beneficial effect: The present invention innovatively provides a demoulding device suitable for separating a pipe product from a mold tube and a mold core shaft. After the positioning mechanism fixes the mold, a corresponding blocking plate is used to block the mold tube and the pipe product at one end without blocking the mold core shaft, but to push the end face of the mold core shaft at the other end. Since the mold tube and the pipe product cannot move axially by the blocked plate, the mold core shaft moves relatively under the action of the pushing force of the pushing mechanism and extends out of the mold tube and the pipe product until the mold core shaft separates from the mold tube and the pipe product. Then, another blocking plate is used to block the mold tube at one end without blocking the pipe product, but to push the end face of the pipe product at the other end. Since the mold tube cannot move axially, the pipe product moves relatively under the action of the pushing force and extends out of the mold tube until the pipe product separates from the mold tube, thereby completing demoulding. This demoulding method will not damage the pipe product and the mold, and the operation steps are closely connected, which can efficiently complete the demoulding operation of the pipe product from the mold tube and the mold core shaft of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of an embodiment of a pipe product demoulding device of the present invention; Figure 2 for Figure 1 Schematic diagram of the positioning mechanism in; Figure 3 for Figure 1 Schematic diagram of the undertaking organization in; Figure 4 Schematic diagram of an ejector head of an embodiment of a tube product demoulding device of the present invention.

[0019] In the figure: 100, mold; 101, mold tube; 102, mold mandrel; 200, pipe product; 10. Support platform; 20. Push mechanism; 30. Positioning mechanism; 31. Limiting seat; 32. Fixed support; 321. Limiting block; 33. Mobile support; 331. Mobile support avoidance hole; 332. Positioning template; 34. Positioning support; 341. Positioning support avoidance hole; 35. Positioning connecting rod; 36. Driving device; 37. Guide rail; 40. Receiver mechanism; 401. Receiver seat; 402. Guide rod; 403. Lifting mechanism; 50, stripping shaft retaining plate; 501, retaining plate center hole; 502, lining block; 503, retaining plate positioning groove; 60. Ejector head; 601. Lining cap connection hole. DETAILED DESCRIPTION

[0020] The basic concept of the tube product demoulding device of the present invention is to first eject the mold core shaft from the mold tube and the tube product, and then eject the tube product from the mold tube. This demoulding method does not damage the tube product and the mold, is suitable for demoulding operations of the tube product from the mold tube and the mold core shaft, and has high operating efficiency.

[0021] The present invention is described in detail below with reference to the embodiments.

[0022] Embodiments of the pipe product demoulding device of the present invention: like Figure 1 、 Figure 2 、 Figure 3 As shown, the pipe product demoulding device includes a support platform 10 and a pushing mechanism 20, a positioning mechanism 30 and a receiving mechanism 40 installed on the support platform 10. The positioning mechanism 30 is used to clamp and position the mold 100 after the pipe product 200 is formed but not demoulded. The pushing mechanism 20 is used to sequentially eject the mold core shaft 102 of the mold 100 and the pipe product 200. The receiving mechanism 40 is used to receive the ejected mold core shaft 102 and the pipe product 200.

[0023] The mold 100 includes a mold tube 101 and a mold core shaft 102. Flanges are provided at both ends of the mold tube 101. The mold core shaft 102 is a cylinder. The diameter of the tube cavity of the mold tube 101 is equal at all axial locations. The mold core shaft 102 is located in the mold tube 101 and is coaxial. A uniform annular gap is formed between the two. The annular gap is used for pouring materials to form the tube product 200. In this embodiment, the tube product 200 is a hollow tube-type insulating pull rod, and the molding material is epoxy resin.

[0024] The mold 100 in the figure is for illustration only. The clamping space of the positioning mechanism 30 meets the length requirement of the mold 100. The positioning mechanism 30 includes a blocking plate for forming a stop with the end surface of the mold tube 101 and the pipe product 200 to allow the mold core shaft 102 to be opened, and a blocking plate for forming a stop with the end surface of the mold tube 101 and the pipe product 200 to allow the mold core shaft 102 to be opened. Figure 2 The stripping shaft retaining plate 50 shown in FIG. Figure 2 The middle state is used for ejecting the mold mandrel 102. The retaining plate used to block the end face of the mold tube 101 and clear the pipe product 200 is a product stripping retaining plate (not shown). The main structural features of each retaining plate are the same. The pipe product demolding device also includes a mandrel pushing structure and a product pushing structure, which are connected to the pushing mechanism 20 when in use. The mandrel pushing structure and the product pushing structure are used in sequence. The mandrel pushing structure is used to push the end face of the mold mandrel 102 from the other side when the corresponding stripping mandrel retaining plate 50 blocks the mold tube 101 and pipe product 200 on one side, thereby separating the mold mandrel 102 from the mold tube 101 and pipe product 200. The product pushing structure is used to push the end face of the pipe product 200 from the other side when the corresponding stripping mandrel retaining plate 50 blocks the mold tube 101 on one side, thereby separating the mold mandrel 102 from the mold tube 101 and pipe product 200.

[0025] The positioning mechanism 30 includes two or more limit seats 31 spaced axially along the mold 100. The bottom of the limit seats 31 is bolted to the top surface of the support platform 10, and the top of the limit seats 31 is provided with a V-shaped groove for positioning and supporting the mold 100. The limit seats 31 are available in various sizes, with different sizes of limit seats 31 having different heights, and can be easily replaced according to the size of the mold 100.

[0026] The positioning mechanism 30 includes a fixed support 32 and a movable support 33. The blocking template is installed on the fixed support 32. A space for clamping the mold 100 is formed between the movable support 33 and the fixed support 32. Each limit seat 31 is located between the movable support 33 and the fixed support 32. The movable support 33 is located on the side of the fixed support 32 close to the pushing mechanism 20. The fixed support 32 is fixed to the support platform 10 by bolts, and the movable support 33 is slidably set on the support platform 10. The support platform 10 is provided with a guide rail 37 and a drive device 36. The movable support 33 can be slidably arranged on the guide rail 37 along the axial direction of the mold 100. The drive device 36 is installed at the end of the guide rail 37 away from the fixed support 32. The drive device 36 adopts a cylinder. When the cylinder is turned on, it can drive the movable support 33 to move toward the fixed support 32. Then, the movable support 33 cooperates with the retaining plate on the fixed support 32 to axially clamp the mold tube 101 on both sides of the mold 100, thereby preventing the mold 100 from moving or deflecting during the demolding process. In other embodiments, a pneumatic clamp can also be provided on the support platform. After the mold is placed on the limit seat, the mold is pressed from top to bottom by the pressure head of the pneumatic clamp.

[0027] The retaining plate has a positioning groove, namely, retaining plate positioning groove 503, adapted to fit over one end of the mold tube 101. The movable support 33 is provided with a positioning structure having a positioning groove, namely, a support positioning groove, adapted to fit over the other end of the mold tube 101. Both the retaining plate positioning groove 503 and the support positioning groove are circular grooves adapted to fit the end flanges of the mold tube 101. When the mold 100 is clamped, the flanges at both ends of the mold 100 extend into the corresponding positioning grooves, facilitating reliable radial positioning. In other embodiments, positioning grooves may be omitted, and positioning may be achieved solely by clamping the mold with the fixed support and movable support, and cooperating with the V-grooves of the stopper.

[0028] With the axial direction of the mold tube 101 as the front-to-back direction, the pushing mechanism 20, the positioning mechanism 30, and the receiving mechanism 40 are arranged along the front-to-back direction. A limit block 321 is fixed on the side of the fixed support 32 facing the mold tube 101. There are two limit blocks 321 on the left and right. A slot for the blocking template to be inserted and pulled up and down is formed between the two limit blocks 321. The blocking template is a square plate with a stop step at the bottom of the slot. The installation position of the blocking template can be positioned to ensure that when the blocking template is inserted and abuts against the stop step, the center hole of the blocking template is coaxial with the mold 100. A pull ring is provided on the top of the blocking template to facilitate force application. The blocking template can be removed from the fixed support 32. The blocking template is configured with a variety of specifications. The blocking template of the corresponding size is selected according to the size of the different molds 100.

[0029] The center hole 501 of the retaining plate is used to clear the mold mandrel 102 or the pipe product 200. The center hole of the stripping plate 50 allows the mold mandrel 102 to pass through when ejecting the mold mandrel 102, while the product stripping plate allows the pipe product 200 to pass through when ejecting the pipe product 200. The center holes of the stripping plate 50 and the product stripping plate have different diameters. The center hole of the stripping plate 50 is larger than the outer diameter of the mold mandrel 102 but smaller than the inner diameter of the pipe product 200, thus blocking the end faces of the mold tube 101 and the pipe product 200. The center hole of the product stripping plate is larger than the outer diameter of the pipe product 200 but smaller than the inner diameter of the mold tube 101, thus blocking the mold tube 101 and allowing the pipe product 200 to pass through. A front-to-back escape passage is provided on the fixed support 32 at the position corresponding to the center hole 501 of the retaining plate. The escape passage is sized to accommodate the mold mandrel 102 of molds 100 of different specifications and the pipe product 200 formed therein.

[0030] The retaining plate is configured according to the mold core shaft 102, the ejection requirements of the pipe product 200 and the sizes of different molds 100. According to different usage requirements, retaining plate of different specifications are selected and installed.

[0031] Inserts 502 are embedded in the center hole 501 of the retaining plate. Multiple inserts 502 are evenly distributed along the circumference of the retaining plate. The hardness of these inserts 502 is lower than that of the retaining plate itself. While the retaining plate itself is made of steel, the inserts 502 are made of copper. This prevents scratches on the mold mandrel 102 or the pipe 200 during demolding, while also ensuring a certain level of structural strength.

[0032] The positioning structure provided on the movable support 33 is a positioning template 332 that can be detachably mounted on the movable support 33. The installation form of the positioning template 332 on the movable support 33 is the same as the installation form of the retaining template on the fixed support 32, and both are structures that can be plugged in and out of the movable support 33. A slot is provided on the side of the movable support 33 facing the mold 100, and the positioning template 332 can be inserted into the slot from the top to the bottom, and can also be pulled out. The positioning template 332 and the movable support 33 are provided with front and rear corresponding avoidance channels for avoiding the pushing mechanism 20. The avoidance channel on the movable support 33 is the movable support avoidance hole 331. The positioning template 332 can also be configured with a variety of specifications according to the size of the mold 100, and can be selected and used as needed to ensure that the positioning template 332 can well press the end face of the mold tube 101.

[0033] The pushing mechanism 20 includes a telescopic cylinder, which is a hydraulic cylinder consisting of a cylinder body and a telescopic rod. The telescopic rod is used for pushing operations, and the telescopic rod serves as the driving rod for generating the pushing force on the mold core shaft 102 and the pipe product 200. The positioning mechanism 30 includes a positioning support 34, which is located on the side of the movable support 33 facing away from the fixed support 32. The cylinder body of the telescopic cylinder is fixed to the positioning support 34, and the pushing mechanism 20 is mounted on the side of the positioning support 34 facing away from the mold 100. The positioning support 34 is provided with an escape passage for circumventing the telescopic rod, namely, a positioning support escape hole 341. The positioning support 34 is removably fixed to the support platform 10 by bolts. The escape passage of the positioning support 34 corresponds front-to-back to the escape passage of the movable support 33.

[0034] The fixed support 32 and the positioning support 34 are connected by positioning rods 35. Two positioning rods 35 are provided on the left and right sides. Positioning holes for the positioning rods 35 are provided on the fixed support 32 and the positioning support 34. Nuts are threadedly connected at both ends of the positioning rods 35 to connect the fixed support 32 to the positioning support 34 via the positioning rods 35. This ensures the relative position of the positioning support 34 and the fixed support 32 and helps to ensure reliable force on the fixed support 32. In other embodiments, the positioning rods may not be provided, and the fixed support and the positioning support may be maintained in position only by being fixed to the support platform.

[0035] Combine Figure 4 When a push operation is required, the end of the telescopic rod of the push mechanism 20 is fixedly connected to the ejector head 60. The maximum diameter of the ejector head 60 can be larger than the diameter of the telescopic rod. One end of the ejector head 60 is fixedly connected to the telescopic rod, and the other end is fixedly connected to a liner cap. The liner cap can be made of soft copper and fits snugly onto a cylindrical boss at the end of the ejector head 60. The boss is provided with a liner cap connection hole 601 for screwing the liner cap. The screw does not protrude beyond the outer end surface of the liner cap. The outer end surface of the liner cap is used to press against the end surface of the mold mandrel 102 or the end surface of the pipe product 200. The ejector head 60 can be configured in various ways depending on the size of the mold mandrel 102, the size of the pipe product 200, and the specifications of the different molds 100. It can be designed based on the size of the product and the mold cavity to meet the demolding requirements of products of different sizes. The ejector head 60 used to push the mold mandrel 102 constitutes the mandrel push mechanism, while the ejector head 60 used to push the pipe product 200 constitutes the product push mechanism. The avoidance channels on the positioning support 34 and the movable support 33 can avoid the ejector head 60, so that under the action of the hydraulic cylinder, the telescopic rod drives the ejector head 60 to move, pushing the mold core shaft 102 or the pipe product 200 from one side. The mold core shaft 102 or the pipe product 200 extends through the avoidance channels on the retaining plate and the fixed support 32 until it is completely ejected to the other side, received by the receiving mechanism 40, and then transferred away.

[0036] The receiving mechanism 40 includes a receiving seat 401 located on the side of the positioning mechanism 30 facing away from the ejection mechanism 20. The receiving seat 401 has a receiving groove for receiving the ejected mold core shaft 102 and the pipe product 200. The receiving groove is a V-shaped groove. The mold core shaft 102 and the pipe product 200 can be supported in the receiving groove during the ejection process, saving manpower.

[0037] The receiving mechanism 40 includes a lifting mechanism 403 for driving the receiving seat 401 up and down to adjust the height of the receiving groove relative to the mold core shaft 102 and the pipe product 200 during ejection. Four guide rods 402 are fixed to the bottom of the lifting seat, extending vertically. Each guide rod 402 passes through the top plate of the support platform 10. The top plate of the support platform 10 is provided with guide holes that cooperate with the guide rods 402. The lifting mechanism 403 is fixed to the underside of the top plate of the support platform 10. The lifting mechanism 403 is a pneumatic cylinder, with two cylinders spaced front and back. The piston rods of the cylinders pass through the top plate of the support platform 10 and are fixed to the bottom of the lifting seat. Driven by the cylinder, parameters can be set according to different mold 100 sizes so that when the receiving seat 401 receives the mold core shaft 102, the mold core shaft 102 remains coaxial with the mold tube 101, preventing the mold core shaft 102 from deflecting and unevenly applying force during ejection. Similarly, when the tubular product 200 needs to be received, the height of the receiving seat 401 is adjusted so that the tubular product 200 and the mold tube 101 remain coaxial. This allows for support during the demolding process for mold mandrels 102 of varying sizes and tubular products. The contact surfaces of the receiving seat 401 with the mold mandrel 102 and tubular product 200 are inlaid with polypropylene pads to prevent scratches.

[0038] During use, select the corresponding limit seat 31 and retaining plate according to the size of the mold 100, select the corresponding size mold 100 parameters in the control system, and adjust the receiving seat 401 to a preset height. Place the mold 100 to be demolded on the limit seat 31, activate the drive device 36, and clamp the mold 100 in place. Activate the demolding switch, and the ejection mechanism 20 will operate, ejecting the mold mandrel 102. After ejection, the mold mandrel 102 slides onto the receiving seat 401 and is then removed. After the mold mandrel 102 is ejected, release the mold 100, remove the ejection mandrel retaining plate 50, install the product ejection retaining plate, lower the receiving seat 401, replace the ejection head 60 for pushing the pipe product 200, clamp the mold 100, and activate the demolding switch again. The pipe product 200 can be ejected from the mold tube 101, and the mold tube 101 slides onto the receiving seat 401 to achieve demolding.

[0039] During the demolding process, the mold 100 is positioned after the pipe product 200 is formed. First, the mold tube 101 and the pipe product 200 are blocked at one end of the mold 100, and the mold core shaft 102 is pushed against the other end of the mold 100. The mold tube 101 and the pipe product 200 cannot move axially, while the mold core shaft 102 moves axially relative to the mold tube 101 and the pipe product 200 until they are separated. Then, one end of the mold tube 101 is blocked, and the other end of the mold tube 101 pushes against the end of the pipe product 200. The mold tube 101 cannot move axially, while the pipe product 200 moves axially relative to the mold tube 101 until it is separated. This demolding method does not damage the pipe product 200 and the mold 100, and the operation steps are closely connected, which can efficiently complete the demolding operation of the pipe product 200 from the mold tube 101 and the mold core shaft 102 of the mold 100.

[0040] The diameter of the telescopic rod of the ejection mechanism 20 is smaller than the diameter of the mold mandrel 102, and the axial length of the ejection head 60 is relatively short. The diameter of the ejection head 60 used to eject the mold mandrel 102 is smaller than the inner diameter of the pipe 200. The telescopic rod, along with the ejection head 60, can be inserted into the inner cavity of the pipe 200 to eject the mold mandrel 102. Alternatively, the ejection head 60 can be omitted and the end of the telescopic rod can be used to directly eject the mold mandrel 102. When ejection of a product is required, the end of the telescopic rod is equipped with an ejection head 60 having a diameter greater than the inner diameter of the pipe 200 and smaller than the inner diameter of the mold tube 101. Driven by the telescopic rod, the end face of the pipe 200 can be ejected.

[0041] In other embodiments, if the diameter of the telescopic rod is larger than the diameter of the mold mandrel, the telescopic rod cannot be inserted into the tube cavity of the pipe product. In this case, an ejector head is not used, but instead a segmented push rod is used. The push rod's length is less than the length of the mold mandrel, and the push rod's diameter is smaller than the diameter of the mold mandrel. The push rod forms a mandrel ejection structure. In use, a push rod is first connected to the end of the telescopic rod. The telescopic rod is extended and the mold mandrel is pushed by the push rod. After a certain pushing stroke, which can be determined by the length of one push rod segment, the telescopic rod retracts with the push rod. The push rod is then removed from the end of the telescopic rod, and a new push rod segment is connected between the push rod segment and the telescopic rod. The telescopic rod is then extended again and the mold mandrel is pushed by the push rod. This process is repeated until the mold mandrel is fully ejected, thereby reducing the length of the telescopic cylinder. Of course, if the telescopic rod has sufficient travel, a single, sufficiently long push rod can also be used to eject the mold mandrel all at once. Similarly, if the diameter of the telescopic rod is larger than the inner diameter of the mold tube, the pipe product can be ejected gradually by adding push rods of smaller diameters one by one, as described above.

[0042] This universally applicable device for demolding pipe products utilizes a stop plate, a stopper seat 31, and a receiving seat 401, adapted to the dimensions of the mold tube 101 and mold mandrel 102. This allows demolding of molds 100 of varying sizes while maintaining consistent centerlines among the mold mandrel 102, the pipe product 200, and the mold tube 101. The ejector head 60 is designed to accommodate the dimensions of the pipe product 200, enabling product demolding without scratching the inner wall of the mold tube 101. Different mold sizes require varying demolding forces, and the hydraulic ejector mechanism 20 provides an adjustable and controllable ejection pressure (0-30T) to meet varying demolding force requirements. This device also accommodates the demolding of insulating tie rod molds 100 of varying diameters. A cylinder-driven clamping mechanism positions the mold 100, ensuring rapid, secure positioning during demolding and preventing movement or deflection.

[0043] This device not only ejects the mold mandrel but also ejects the tubular product from the mold cavity. It is compatible with the demolding of insulating rods of varying sizes. It enables rapid ejection of tubular products while maintaining the center of the mold mandrel at all locations before and after ejection. This reduces scratches on the product during the demolding process, significantly improves the efficiency of insulating rod demolding, and reduces product scrap. This significantly contributes to improved product quality and consistency, increasing product qualification rates. Utilizing ejector structures and retaining plates of varying sizes, it allows for the demolding of tubular products of varying sizes. This effectively utilizes the space available in the demolding device, ensuring efficient demolding.

[0044] Embodiments of the method for demoulding a pipe product of the present invention: The demoulding method for regulated products includes the following steps: Position the mold after the pipe product is formed; first, block the mold tube and the pipe product at one end of the mold, and push the mold core shaft end face at the other end of the mold. The mold tube and the pipe product cannot move axially, but the mold core shaft moves axially relative to the mold tube and the pipe product until they are separated; then block one end of the mold tube, and push the pipe product end face at the other end of the mold tube. The mold tube cannot move axially, but the pipe product moves axially relative to the mold tube until it is separated. The driving rod of the pushing mechanism is used to generate a pushing force on the mold core shaft and the pipe product in the corresponding link. The specific implementation process of this pipe product demoulding method can refer to the demoulding process described in the embodiment of the pipe product demoulding device above, and will not be repeated here.

[0045] In addition, when the diameter of the driving rod is larger than the diameter of the mold core shaft, a push rod is first connected to the end of the driving rod. The length of the push rod is smaller than the length of the mold core shaft, and the diameter of the push rod is smaller than the diameter of the mold core shaft. The driving rod is extended and pushes the mold core shaft through the push rod. After pushing for a certain stroke, the driving rod retracts with the push rod, and then the push rod is removed from the driving rod, and a new push rod is connected between the push rod and the driving rod. Then the driving rod is extended and the mold core shaft is pushed through the push rod. The above process is repeated until the mold core shaft is completely ejected.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for demoulding a pipe product, characterized in that: Position the mold after the pipe product is formed; first, block the mold tube and the pipe product at one end of the mold, and push the end face of the mold core shaft at the other end of the mold. The mold tube and the pipe product cannot move axially, and the mold core shaft moves axially relative to the mold tube and the pipe product until they are separated; then block one end of the mold tube, and push the end face of the pipe product at the other end of the mold tube. The mold tube cannot move axially, and the pipe product moves axially relative to the mold tube until it is separated.

2. The method for demoulding a pipe product according to claim 1, wherein: The driving rod of the ejection mechanism is used to form an ejection force on the mold core shaft or the pipe product. When the diameter of the driving rod of the ejection mechanism is larger than the diameter of the mold core shaft, a push rod is first connected to the end of the driving rod. The length of the push rod is smaller than the length of the mold core shaft, and the diameter of the push rod is smaller than the diameter of the mold core shaft. The driving rod is extended and pushes the mold core shaft through the push rod. After a certain pushing stroke, the driving rod retracts with the push rod, and then the push rod is removed from the driving rod, and a new push rod is connected between the push rod and the driving rod. Then the driving rod is extended and the mold core shaft is pushed through the push rod. The above process is repeated until the mold core shaft is completely ejected.

3. A tube product demoulding device, characterized in that: The device comprises a positioning mechanism and a pushing mechanism. The positioning mechanism is used to position the mold after the pipe product is formed but not demolded. The positioning mechanism comprises a blocking plate used to form a stop with the mold tube and the end face of the pipe product of the mold to allow the mold core shaft to be opened, and a blocking plate used to block the end face of the mold tube to allow the pipe product to be opened. The pipe product demolding device also comprises a core shaft pushing structure and a product pushing structure connected to the pushing mechanism when in use. The core shaft pushing structure is used to push the end face of the mold core shaft on the other side when the corresponding blocking plate blocks the mold tube and the pipe product on one side, so that the mold core shaft is separated from the mold tube and the pipe product. The product pushing structure is used to push the end face of the pipe product on the other side when the corresponding blocking plate blocks the mold tube on one side, so that the pipe product is separated from the mold tube.

4. The tube product demoulding device according to claim 3, characterized in that: The positioning mechanism includes a movable support and a fixed support. The retaining plate is installed on the fixed support. A space for clamping the mold is formed between the movable support and the fixed support so that the movable support moves toward the fixed support to axially clamp the mold tube.

5. The tube product demoulding device according to claim 4, characterized in that: The retaining plate has a positioning groove for fitting on one end of the mold tube, and the movable support is provided with a positioning structure having a positioning groove for fitting on the other end of the mold tube.

6. The tube product demoulding device according to claim 5, characterized in that: The positioning structure is a positioning template that can be detachably mounted on a movable support.

7. The tube product demoulding device according to any one of claims 3 to 6, characterized in that: The pushing mechanism includes a telescopic cylinder, the telescopic rod of the telescopic cylinder is a driving rod used to form a pushing force on the mold core shaft and the pipe product, and the positioning mechanism includes a positioning support fixed to the cylinder body of the telescopic cylinder and a fixed support for installing the baffle plate. The fixed support is connected to the positioning support through a positioning connecting rod, and the positioning support is provided with an avoidance channel for avoiding the telescopic rod of the telescopic cylinder.

8. The tube product demoulding device according to any one of claims 3 to 6, characterized in that: The retaining plate has a central hole for allowing the mold core shaft or pipe product to pass through. A lining block is embedded in the hole wall of the central hole of the retaining plate. The hardness of the lining block is less than the hardness of the retaining plate body.

9. The tube product demoulding device according to any one of claims 3 to 6, characterized in that: The tube product demoulding device further comprises a receiving seat located on the side of the positioning mechanism facing away from the pushing mechanism, wherein the receiving seat has a receiving groove for receiving the ejected mold core shaft and the tube product.

10. The tube product demoulding device according to claim 9, characterized in that: The tube product demoulding device also includes a lifting mechanism for driving the receiving seat to rise and fall to adapt to adjusting the height of the receiving groove relative to the mold core shaft and the tube product when being ejected.

Images