A mold-forming device for prestressed plastic corrugated pipe and its working method

Abstract

The invention discloses a mold-closing molding device for a prestressed plastic corrugated pipe and a working method thereof, and relates to the technical field of corrugated pipe molding. The molding device comprises a double-chain molding mold, and the double-chain molding mold comprises a first molding mold chain and a second molding mold chain. The first molding mold chain and the second molding mold chain are formed by connecting a plurality of groups of chain plates end to end. The first molding mold chain comprises a first mold block fixedly arranged on the outer side of the chain plate, and the second molding mold chain comprises a second mold block fixedly arranged on the outer side of the chain plate; cooling cavities are both provided in the first mold block and the second mold block, and infusion ports are respectively provided on the tops of the cooling cavities, and an adjustment module for adjusting the opening or closing thereof is provided in the infusion ports; when the coolant is circulated and transported, the invention does not need to stop the machine, so that the molding of the corrugated pipe can be carried out continuously, and the cooling effect is not attenuated, which not only improves the production efficiency, but also ensures the production quality of the product.

Description

Technical Field

[0001] The invention relates to the technical field of bellows molding, and in particular to a mold-jointing molding device for a prestressed plastic bellows and a working method thereof. Background Art

[0002] Prestressed plastic corrugated pipe is a new type of porous material made of HDPE (high-density polyethylene) through a specific process. It is mainly used in post-tensioned prestressed cement structures, such as roads, railways, bridges, slopes, high-rise buildings and other large-span tensioning projects.

[0003] The production process of the corrugated pipe is that the material is extruded from the extruder in a molten state to the extrusion die, and the material is formed under uniform gas pressure in the molding module. The current molding process often uses a double-chain molding die. The double-chain molding die is composed of hundreds of pairs of modules that can be separated left and right. These modules can be closed and opened cyclically. During the molding process of the corrugated pipe, the extruder head is inserted into the mold cavity. With the precise closure of each set of molds, a bellows molding cavity can be formed to form the bellows structure.

[0004] After the molten plastic is formed into a corrugated tube in the molding cavity, the molds on both sides need to be cooled and hardened before opening. If it is not cooled, it may be deformed under the action of its own weight, internal stress or external traction. The cooling process can quickly transform the corrugated tube from a molten state to a solid state, thereby fixing its shape and size.

[0005] At present, the cooling system of the mold usually includes two methods. The first method is composed of a coolant, a temperature control and pumping device, and a cooling pipeline inside the mold. These components together constitute a complete cooling circuit for taking heat away from the mold. The second method is as follows: For example, the patent document with the announcement number CN118238379B discloses a forming device for the production of corrugated pipes, which simultaneously discloses that the air is discharged through the air outlet and the elbow on the ring pipe, and the air outlet can be blown to the forming module to achieve auxiliary heat dissipation of the forming module and accelerate the cooling of the forming module.

[0006] For the first cooling method: since each mold needs to follow the sprocket drive during the molding process, each mold is independent of each other, and the coolant needs to be stored in the mold in advance. As the production continues, the temperature of the coolant will not continue to rise. After running for a period of time, it is necessary to stop and wait for the coolant to cool down, or replace the coolant. The process is more cumbersome and delays the continuous production. For the second cooling method: since the molds on both sides are completely closed after closing, the external cooling air cannot enter the molding cavity for cooling, resulting in poor cooling effect. After the molds on both sides are opened, the formed bellows can easily deform under the action of gravity, affecting product quality. Summary of the invention

[0007] The purpose of the present invention is to provide a mold-forming device for a prestressed plastic corrugated pipe and a working method thereof, so as to solve the following technical problems:

[0008] 1) The temperature of the coolant in the mold of the prior art will increase as the production progresses; 2) The cooling effect of air cooling is poor, and the bellows is easily deformed after molding.

[0009] The purpose of the present invention can be achieved through the following technical solutions:

[0010] A mold-closing molding device for a prestressed plastic corrugated pipe comprises a double-chain molding die, wherein the double-chain molding die comprises a first molding die chain and a second molding die chain, wherein the first molding die chain and the second molding die chain are formed by connecting a plurality of chain plates end to end, wherein the first molding die chain comprises a first mold block fixedly arranged on the outer side of the chain plate, and the second molding die chain comprises a second mold block fixedly arranged on the outer side of the chain plate;

[0011] The first mold block and the second mold block are both provided with cooling cavities, and the tops of the cooling cavities are respectively provided with infusion ports, and the infusion ports are provided with adjustment modules for adjusting the opening or closing thereof;

[0012] A liquid inlet is provided at the bottom of the cooling cavity of the second mold block, and the liquid inlet is connected to a liquid inlet module, and the liquid inlet module is used to input external coolant into the cooling cavity. A liquid drain port is provided at the bottom of the cooling cavity of the first mold block, and the liquid drain port is connected to a liquid drain module, and the liquid drain module is used to discharge the coolant in the cooling cavity.

[0013] Preferably, the adjustment module includes a first plunger slidably embedded in the infusion port, the first plunger protrudes to the outside of the infusion port, a first blind hole is provided on the side of the first plunger away from the cooling cavity, and a plurality of groups of first openings connected to the first blind hole are provided in a circumferential array on the side of the first plunger close to the cooling cavity.

[0014] Preferably, one end of the first plunger close to the cooling chamber is fixed to the first guide plate;

[0015] Wherein, a first guide rod is fixedly arranged in the cooling cavity, a first guide plate is slidably sleeved on the first guide rod, and a first spring is arranged on the first guide rod.

[0016] Preferably, the liquid inlet module includes an infusion pump fixedly arranged at the bottom of the second mold block, the infusion pump is connected to the liquid inlet, and the other end of the infusion pump is connected to the liquid inlet pipe;

[0017] Wherein, the liquid inlet module also includes a liquid storage tank arranged at the bottom of the second molding die chain, and the liquid storage tank stores coolant.

[0018] Preferably, a lifting tube is provided on the sliding sleeve of one end of the liquid inlet tube away from the infusion pump, and the lifting tube is connected to a first lifting part that drives the lifting of the lifting tube;

[0019] Among them, the first lifting part includes a first lifting plate fixedly arranged on both sides of the lifting tube, the first lifting plate is rotatably arranged on one end away from the lifting tube to provide a first guide wheel, first horizontal guide frames are symmetrically arranged on both sides of the liquid storage tank in parallel, first inclined guide frames are symmetrically fixedly arranged at both ends of the first horizontal guide frame, and the first inclined guide frames on both sides are respectively inclined towards the direction close to the second mold block.

[0020] Preferably, a sleeve is fixedly arranged at the bottom of the second mold block, and a telescopic rod is slidably inserted and arranged at one end of the sleeve away from the second mold block, and the other end of the telescopic rod is fixed to the first lifting plate;

[0021] Wherein, the telescopic rod is provided with a second spring.

[0022] Preferably, two groups of L-shaped brackets are fixedly arranged at the bottom of the second mold block, a first electrode sheet is provided on the side of the L-shaped bracket close to the second mold block, and a second electrode sheet is provided on the side of the first lifting plates on both sides close to the first electrode sheet, and the first electrode sheet and the second electrode sheet are electrically connected to the infusion pump through a controller.

[0023] Preferably, the liquid discharge module comprises a second plunger slidably embedded in the liquid discharge port, the second plunger extends to the bottom of the first mold block, a second blind hole is provided on a side of the second plunger away from the first mold block, and a plurality of groups of second openings connected to the second blind holes are provided on the second plunger in a circumferential array;

[0024] Wherein, the second plunger is connected to a second lifting part that drives the second plunger to rise and fall.

[0025] Preferably, a collecting box is provided at the bottom of the first forming die chain for collecting the discharged coolant;

[0026] Among them, the second lifting part includes second lifting plates fixedly arranged on both sides of the second plunger, a second guide wheel is rotatably arranged on one end of the second lifting plate away from the second plunger, two groups of second horizontal guide frames are parallel and symmetrically arranged on the collection box, second inclined guide frames are symmetrically fixedly arranged at both ends of the second horizontal guide frame, and the second inclined guide frames are inclined in the direction away from the first mold block, a second guide rod is also fixedly arranged in the cooling chamber, a second guide plate fixed to the second plunger is slidably sleeved on the second guide rod, and a third spring is also provided on the second guide rod.

[0027] A working method of a mold-forming device for a prestressed plastic corrugated pipe comprises the following steps:

[0028] The first forming mold chain and the second forming mold chain respectively drive the first mold block and the second mold block to transmit synchronously;

[0029] When the first mold block is closed and connected with the second mold block, the adjusting module adjusts the infusion ports on the cooling chambers on both sides to be in a connected state, the liquid inlet module simultaneously opens the liquid inlet, and the outer cooling liquid is input into the cooling chamber through the liquid inlet, and the liquid discharge module opens the liquid discharge port to discharge the cooling liquid in the cooling chamber;

[0030] The output coolant is cooled and then re-input into the cooling chamber;

[0031] After the bellows is formed, before the first mold block and the second mold block are opened, the regulating module adjusts the infusion port to close, the liquid inlet module closes the liquid inlet, and the liquid discharge module closes the liquid discharge port.

[0032] Beneficial effects of the present invention:

[0033] When the first mold block and the second mold block of the present invention are closed and connected, the infusion ports on the cooling chambers on both sides are first adjusted to be in a connected state through the adjusting module, and then the infusion port is opened by the liquid inlet module to input the outer cooling liquid into the cooling chamber through the liquid inlet port. At the same time, the drainage port is opened by the drainage module to discharge the cooling liquid in the cooling chamber. Correspondingly, the output cooling liquid can be cooled again and then re-input into the cooling chamber, thereby realizing the effect of circulating the cooling liquid in the cooling chamber. Before the first mold block and the second mold block are opened, the adjusting module adjusts the infusion port to be closed, the liquid inlet module closes the infusion port, and the drainage module closes the drainage port to prevent the cooling liquid in the cooling chamber from being discharged from the infusion port, the liquid inlet port and the drainage port when the two are separated. The present invention can effectively avoid the problem of the prior art that the temperature of the cooling liquid increases with the continuous production, and the present invention does not need to stop the machine when the cooling liquid is circulated, so that the molding of the corrugated pipe can be carried out continuously, and the cooling effect is not attenuated, which not only improves the production efficiency, but also ensures the production quality of the product.

[0034] Before the mold blocks on both sides of the present invention are molded, the first guide wheel first rolls and abuts against the first inclined guide frame. With the movement of the mold blocks, the first guide wheel can drive the first lifting plate to descend under the limiting action of the first inclined guide frame until the first guide wheel contacts the first horizontal guide frame and stops descending. At this time, the first lifting plate drives the lifting tube to slide downward and enter the coolant. During the rising process, the first lifting plate can stretch the second spring through the telescopic rod and generate elastic force. When the mold blocks on both sides are separated from each other, the first guide wheel also moves to the end of the first horizontal guide frame, and then the first lifting plate can be driven to reset through the second spring to drive the lifting tube to reset. The present invention can automatically drive the lifting tube to rise and fall through the arrangement of the guide frame and the first guide wheel, and does not need to arrange other servo drive equipment to drive the movement of the lifting tube, and has higher stability and synchronization.

[0035] When the mold blocks on both sides of the present invention are not closed, the first electrode sheet and the second electrode sheet are in a state of being separated from each other, and the infusion pump is not started. As the mold blocks on both sides are closed, the first lifting plate moves toward the direction of the L-shaped bracket until the first electrode sheet is connected to the second electrode sheet and generates an electrical signal, and then the infusion pump can be turned on by the controller to perform a liquid extraction operation. As the first lifting plate rises, the infusion pump can be controlled to be turned off, so as to achieve the effect of automatically controlling the infusion pump to be turned on and off. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] Figure 1 It is a structural schematic diagram of a mold-jointing molding device for a prestressed plastic corrugated pipe of the present invention;

[0038] Figure 2 The structure of the double-chain forming mold in the mold-jointing forming device for prestressed plastic corrugated pipe of the present invention is schematically shown. Figure 1 ;

[0039] Figure 3 The structure of the double-chain forming mold in the mold-jointing forming device for prestressed plastic corrugated pipe of the present invention is schematically shown. Figure 2 ;

[0040] Figure 4 It is a structural schematic diagram of a first molding die chain in a mold-closing molding device for a prestressed plastic corrugated pipe of the present invention;

[0041] Figure 5 It is a structural schematic diagram of a second mold block in a mold-closing molding device for a prestressed plastic corrugated pipe of the present invention;

[0042] Figure 6 It is a structural schematic diagram of a first mold block in a mold-closing molding device for a prestressed plastic corrugated pipe of the present invention;

[0043] Figure 7 It is a schematic structural diagram of a section of a first mold block in a mold-closing molding device for a prestressed plastic corrugated pipe of the present invention;

[0044] Figure 8 It is a structural schematic diagram of a first plunger in a mold-jointing molding device for a prestressed plastic corrugated pipe of the present invention;

[0045] Fig. 9 It is a structural schematic diagram of a second plunger in a mold-jointing molding device for a prestressed plastic corrugated pipe of the present invention;

[0046] Fig.10 It is a structural schematic diagram of an infusion port in a mold-jointing molding device for a prestressed plastic corrugated pipe of the present invention;

[0047] Fig.11 It is a schematic diagram of the cross-section structure of the second mold block in a mold-closing molding device for a prestressed plastic corrugated pipe of the present invention;

[0048] Fig.12 It is a structural schematic diagram of a mold-closing molding device for a prestressed plastic corrugated pipe of the present invention when mold blocks on both sides are closed;

[0049] Fig.13 The present invention is a schematic structural diagram of a lifting pipe in a mold-jointing molding device for a prestressed plastic corrugated pipe when the lifting pipe descends.

[0050] In the figure: 1, double chain molding die; 2, melt extruder; 3, infusion tube; 4, second horizontal guide frame; 5, infusion pump; 6, infusion port; 7, discharge port; 101, first molding die chain; 102, second molding die chain; 103, first mold block; 104, second mold block; 105, chain plate; 106, sprocket; 107, corrugated groove; 108, semicircular mold cavity; 301, collection box; 302, liquid storage box; 303, infusion pump; 401, second inclined guide frame; 402, second guide wheel; 403, first horizontal guide frame; 404, first inclined guide frame; 405, sleeve; 406, telescopic Rod; 407, second spring; 501, liquid inlet pipe; 502, lifting pipe; 503, first lifting plate; 504, first electrode sheet; 505, second electrode sheet; 506, first guide wheel; 507, L-shaped bracket; 508, liquid inlet; 601, first guide rod; 602, first spring; 603, first guide plate; 604, first plunger; 605, first blind hole; 606, first through port; 701, second plunger; 702, second lifting plate; 703, second blind hole; 704, third spring; 705, cooling chamber; 706, second through port; 707, second guide plate; 708, second guide rod. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Example 1

[0053] See also Figure 1As shown, the present invention is a mold-closing molding device for a prestressed plastic corrugated pipe, comprising a double-chain molding die 1, which is arranged on one side of a melt extruder 2; specifically, the extrusion end of the melt extruder 2 extends to the double-chain molding die 1. In this embodiment, the plastic is first melt-extruded by the melt extruder 2, and the molten plastic after extrusion is transported to the double-chain molding die 1 for molding the corrugated pipe.

[0054] In this embodiment, please refer to Figure 2-Figure 4 The double-chain forming mold 1 includes a first forming mold chain 101 and a second forming mold chain 102. The first forming mold chain 101 and the second forming mold chain 102 are formed by connecting a plurality of chain plates 105 end to end. The first forming mold chain 101 includes a first mold block 103 fixedly arranged on the outside of the chain plate 105, and the second forming mold chain 102 includes a second mold block 104 fixedly arranged on the outside of the chain plate 105. Specifically, the first forming mold chain 101 and the second forming mold chain 102 in this embodiment also include two groups of sprockets 106 for driving the chain plate 105 to transmit. The servo motor drives the sprocket 106 to rotate. The sprockets 106 on both sides can synchronously drive the chain plate 105 to transmit during the rotation process, thereby realizing the transportation of the mold blocks. The structure of this part is all prior art, and this embodiment will not elaborate on it.

[0055] Among them, the first mold block 103 and the second mold block 104 are both provided with a semicircular mold cavity 108, the sizes of the semicircular mold cavities 108 on both sides are equal, and each semicircular mold cavity 108 is correspondingly provided with a plurality of groups of corrugated grooves 107. When the first mold block 103 and the second mold block 104 are combined, the two groups of semicircular mold cavities 108 are enclosed to form a molding cavity for molding the corrugated pipe.

[0056] See also Figure 5-Figure 7 as well as Figure 11-Figure 12 The first mold block 103 and the second mold block 104 are both provided with cooling cavities 705, and the tops of the cooling cavities 705 are respectively provided with infusion ports 6, and the infusion ports 6 are provided with adjustment modules, and the adjustment modules are used to adjust the infusion ports 6 to be opened or closed;

[0057] A liquid inlet 508 is provided at the bottom of the cooling cavity 705 of the second mold block 104, and the liquid inlet 508 is connected to a liquid inlet module, and the liquid inlet module is used to input external coolant into the cooling cavity 705. A liquid drain port 7 is provided at the bottom of the cooling cavity 705 of the first mold block 103, and the liquid drain port 7 is connected to a liquid drain module, and the liquid drain module is used to discharge the coolant in the cooling cavity 705.

[0058] It should be noted that, in the present embodiment, the cooling chamber 705 of the first mold block 103 and the second mold block 104 is pre-stored with coolant. With the transmission of the first molding mold chain 101 and the second molding mold chain 102, when the first mold block 103 and the second mold block 104 are closed and connected, the infusion ports 6 on the cooling chambers 705 on both sides are first adjusted by the adjustment module to be in a connected state, and then the inlet port 508 is opened by the liquid inlet module to input the outer coolant into the cooling chamber 705 through the liquid inlet port 508. At the same time, the drain port 7 is opened by the drain module to discharge the coolant in the cooling chamber 705. Accordingly, the output coolant can be cooled again and then re-input into the cooling chamber 705, thereby realizing the effect of circulating the coolant in the cooling chamber 705 (see Fig.12 ), before the first mold block 103 and the second mold block 104 are opened, the regulating module adjusts the infusion port 6 to be closed, the liquid inlet module closes the liquid inlet 508, and the liquid discharge module closes the liquid discharge port 7 to prevent the coolant in the cooling cavity 705 from being discharged from the infusion port 6, the liquid inlet 508 and the liquid discharge port 7 when the two are separated; this embodiment can effectively avoid the problem of the coolant temperature rising as the production continues in the prior art, and this embodiment does not need to stop when the coolant is circulated, so that the bellows can be formed continuously without attenuation of the cooling effect, which not only improves the production efficiency but also ensures the production quality of the product.

[0059] Example 2

[0060] Based on Example 1, please refer to Figure 5-Figure 8 as well as Fig.10 The adjusting module includes a first plunger 604 slidably embedded in the infusion port 6, the first plunger 604 protrudes to the outside of the infusion port 6, a first blind hole 605 is provided on the side of the first plunger 604 away from the cooling cavity 705, and a plurality of first through holes 606 connected to the first blind holes 605 are provided in a circumferential array on the side of the first plunger 604 close to the cooling cavity 705; it can be explained that when the first mold block 103 and the second mold block 104 are in a state of being separated from each other, the first plunger 604 protrudes to the outside of the infusion port 6, at which time the first through hole 606 is just in a state of being in contact with the cavity wall, and the cooling cavity 705 in the cooling cavity 705 is closed. Liquid cannot enter the first blind hole 605 through the first opening 606, and external coolant cannot enter the cooling cavity 705. When the first mold block 103 and the second mold block 104 are combined with each other, the first plunger 604 can be squeezed into the infusion port 6 respectively. When the first plunger 604 is completely retracted to the infusion port 6, the first opening 606 moves into the cooling cavity 705. At this time, the coolant in the cooling cavity 705 of the mold blocks on both sides can be transported to each other through the first opening 606 and the first blind hole 605. Therefore, this embodiment can automatically connect the infusion ports 6 on both sides as the mold blocks on both sides are closed for transporting coolant.

[0061] In addition, in this embodiment, two groups of infusion ports 6 are provided on each group of mold blocks, and three or four groups may also be provided. The specific number is not limited, as long as the actual effect of circulating and transporting the cooling liquid is met.

[0062] When the mold blocks on both sides are separated from each other, in order to automatically drive the first plunger 604 to reset and seal the infusion port 6, in this embodiment, reference can be made to Figure 7 and Figure 8 , one end of the first plunger 604 that is close to the cooling chamber 705 is fixed to the first guide plate 603, wherein the first guide rod 601 is fixedly arranged in the cooling chamber 705, the first guide plate 603 is slidably sleeved on the first guide rod 601, and the first guide rod 601 is provided with a first spring 602; specifically, one end of the first spring 602 is fixed to the first guide plate 603, and the other end is fixed to the end of the first guide rod 601; it can be explained that when the first plunger 604 slides in the infusion port 6, it can drive the first guide plate 603 to slide on the first guide rod 601, thereby compressing the first spring 602 and generating elastic force, and as the mold blocks on both sides are separated, the first spring 602 can drive the first guide plate 603 and the first plunger 604 to reset.

[0063] See also Figure 5 , Fig.11 as well as Fig.13 The liquid inlet module includes an infusion pump 5 fixedly arranged at the bottom of the second mold block 104, the infusion pump 5 is connected to the liquid inlet 508, and the other end of the infusion pump 5 is connected to the liquid inlet pipe 501, wherein the liquid inlet module also includes a liquid storage tank 302 arranged at the bottom of the second molding mold chain 102, and the liquid storage tank 302 stores coolant; it can be explained that when infusing liquid into the cooling cavity 705, the infusion pump 5 first extracts the coolant in the liquid storage tank 302 through the liquid inlet pipe 501, and then inputs it through the liquid inlet 508, wherein the liquid storage tank 302 of this embodiment needs to have a certain length, so that the mold blocks on both sides can extract coolant through the liquid inlet pipe 501 during the closing and opening process.

[0064] Specifically, in the process of extracting the coolant, since the second mold block 104 is in a moving state, in order to allow the liquid inlet pipe 501 to extend into the liquid storage tank 302 for extraction, in this embodiment, a lifting pipe 502 is slidably sleeved on the end of the liquid inlet pipe 501 away from the infusion pump 5, and the lifting pipe 502 is connected to a first lifting part that drives it to rise and fall; it can be explained that when the mold blocks on both sides are not closed, with the movement of the mold blocks, in order to avoid the lifting pipe 502 from interfering with the wall of one side of the liquid storage tank 302, the height of the bottom of the lifting pipe 502 needs to be higher than the wall of the liquid storage tank 302. When the mold blocks on both sides are closed, in this embodiment, the lifting pipe 502 can be driven by the first lifting part to slide downward and enter the coolant, and then the coolant can be extracted by the infusion pump 5. After the bellows is shaped, the mold blocks on both sides drive the lifting pipe 502 to rise to the initial position by the first lifting part before separation, so as to avoid the lifting pipe 502 from interfering with the wall of the other side of the liquid storage tank 302.

[0065] In this embodiment, the first lifting part includes a first lifting plate 503 fixedly arranged on both sides of the lifting tube 502, and a first guide wheel 506 is rotatably arranged at one end of the first lifting plate 503 away from the lifting tube 502, wherein the first horizontal guide frames 403 are arranged in parallel and symmetrically on both sides of the liquid storage tank 302, and the first inclined guide frames 404 are symmetrically and fixedly arranged at both ends of the first horizontal guide frame 403, and the first inclined guide frames 404 on both sides are inclined towards the direction close to the second mold block 104 respectively; it can be explained that before the mold blocks on both sides are molded, the first guide wheel 506 first rolls and abuts against the first inclined guide frame 404, and with the movement of the mold blocks, the first guide wheel 506 can drive the first lifting plate 503 to descend under the limiting action of the first inclined guide frame 404, until the first guide wheel 506 stops descending when it contacts the first horizontal guide frame 403, at this time, the first lifting plate 503 drives the lifting tube 502 to slide downward and enter the coolant;

[0066] Furthermore, a sleeve 405 is fixedly arranged at the bottom of the second mold block 104, and a telescopic rod 406 is slidably inserted and arranged at one end of the sleeve 405 away from the second mold block 104, and the other end of the telescopic rod 406 is fixed to the first lifting plate 503, wherein a second spring 407 is arranged on the telescopic rod 406; specifically, one end of the second spring 407 is fixed to the sleeve 405, and the other end is fixed to the first lifting plate 503; it can be explained that the first lifting plate 503 can stretch the second spring 407 through the telescopic rod 406 and generate elastic force during the rising process, and when the mold blocks on both sides are separated from each other, the first guide wheel 506 also moves to the end of the first horizontal guide frame 403, and then the first lifting plate 503 can be driven to reset through the second spring 407 to drive the lifting tube 502 to reset. In this embodiment, the lifting tube 502 can be automatically driven to rise and fall by setting the guide frame and the first guide wheel 506, and there is no need to set other servo drive equipment to drive the lifting tube 502 to move, and the stability and synchronization are higher.

[0067] Furthermore, in order to adjust the automatic opening and closing of the infusion pump 5, in the present embodiment, two groups of L-shaped brackets 507 are fixedly arranged at the bottom of the second mold block 104, and a first electrode sheet 504 is provided on the side of the L-shaped bracket 507 close to the second mold block 104, and a second electrode sheet 505 is provided on the side of the first lifting plates 503 on both sides close to the first electrode sheet 504, and the first electrode sheet 504 and the second electrode sheet 505 are electrically connected to the infusion pump 5 through the controller; it can be explained that when the mold blocks on both sides are not closed, the first electrode sheet 504 and the second electrode sheet 505 are in a state of being separated from each other, and the infusion pump 5 is not started. As the mold blocks on both sides are closed, the first lifting plate 503 moves toward the direction of the L-shaped bracket 507 until the first electrode sheet 504 is connected to the second electrode sheet 505 and generates an electrical signal, and then the infusion pump 5 can be turned on by the controller to perform the pumping operation, and as the first lifting plate 503 rises, the infusion pump 5 can be controlled to be turned off, so as to achieve the effect of automatically regulating the opening and closing of the infusion pump 5, and the stability is higher.

[0068] See also Figure 6-Figure 7 as well as Fig. 9The discharge module includes a second plunger 701 slidably embedded in the discharge port 7, the second plunger 701 extends to the bottom of the first mold block 103, a second blind hole 703 is provided on the side of the second plunger 701 away from the first mold block 103, and a plurality of groups of second openings 706 connected to the second blind holes 703 are provided on the second plunger 701 in a circumferential array, wherein the second plunger 701 is connected to a second lifting part that drives the second plunger 701 to rise and fall; it can be explained that when the mold blocks on both sides are not closed, the second openings 706 are in the embedded state. In the state where the coolant enters the wall of the cooling chamber 705, the coolant in the cooling chamber cannot be discharged through the second through port 706 and the second blind hole 703. When drainage is required, the second lifting part drives the second plunger 701 to rise so that the second through port 706 moves into the cooling chamber 705. At this time, the coolant in the cooling chamber 705 can be discharged through the second through port 706 and the second blind hole 703. Correspondingly, as the mold blocks on both sides are separated at this time, the second lifting part drives the second plunger 701 to descend to seal the drain port 7 again.

[0069] In this embodiment, please refer to Figure 2-Figure 3 A collecting box 301 is provided at the bottom of the first molding die chain 101 for collecting the discharged coolant, wherein the length of the collecting box 301 and the liquid storage box 302 of this embodiment is equal.

[0070] Specifically, the second lifting part includes a second lifting plate 702 fixedly arranged on both sides of the second plunger 701, and a second guide wheel 402 is rotatably arranged at one end of the second lifting plate 702 away from the second plunger 701, and two groups of second horizontal guide frames 4 are arranged in parallel and symmetrically on the collection box 301, and second inclined guide frames 401 are symmetrically fixedly arranged at both ends of the second horizontal guide frame 4, and the second inclined guide frames 401 are inclined in a direction away from the first mold block 103. A second guide rod 708 is also fixedly arranged in the cooling chamber 705, and a second guide plate 707 fixed to the second plunger 701 is slidably sleeved on the second guide rod 708, and a third spring 704 is also provided on the second guide rod 708; specifically, one end of the third spring 704 is fixed to the second guide plate 707, and the other end of the third spring 704 is fixed to the second guide plate 707. The second end is fixed to the cavity wall of the cooling cavity 705; it can be explained that before the mold blocks on both sides are closed, their second guide wheels 402 roll and abut against the second inclined guide frame 401. As the mold blocks continue to move, under the limiting action of the second inclined guide frame 401, the second lifting plate 702 and the second plunger 701 can be driven to rise, and the second plunger 701 drives the third spring 704 to stretch and generate elastic force through the second guide plate 707 until the second guide wheel 402 moves to the second horizontal guide frame 4 and stops rising. At this time, the second through port 706 moves into the cooling cavity 705. Correspondingly, when the second guide wheel 402 moves to the end of the second horizontal guide frame 4 and separates, the third spring 704 can drive the second plunger 701 to automatically reset to seal the drain port 7 again;

[0071] It should be noted that the collecting box 301 and the liquid storage tank 302 in this embodiment are connected through a valve, and cooling equipment is provided in both the collecting box 301 and the liquid storage tank 302 to perform timed cooling of the coolant. At the same time, two groups of liquid replenishing tubes 3 are provided on one side of the liquid storage tank 302, and a liquid replenishing pump 303 is provided in the liquid replenishing tube 3. By arranging a liquid level sensor and a temperature sensor in the liquid storage tank 302, when the liquid level is less than a preset threshold, the coolant can be replenished to the liquid storage tank 302 through the liquid replenishing pump 303 and the liquid replenishing tube 3. Correspondingly, the temperature sensor can timely monitor the temperature of the coolant in the collecting box 301 and the liquid storage tank 302 to monitor whether the coolant temperature meets the requirements.

[0072] A working method of a mold-forming device for a prestressed plastic corrugated pipe comprises the following steps:

[0073] S1. Please refer to Figure 2-Figure 4 , the first molding die chain 101 and the second molding die chain 102 respectively drive the first die block 103 and the second die block 104 to transmit synchronously;

[0074] S2. Please refer to Figure 5-Figure 7 When the first mold block 103 is closed and connected with the second mold block 104, the adjusting module adjusts the infusion ports 6 on the cooling chambers 705 on both sides to be in a connected state, the liquid inlet module simultaneously opens the liquid inlet 508, and the external coolant is input into the cooling chamber 705 through the liquid inlet 508, and the liquid discharge module opens the liquid discharge port 7 to discharge the coolant in the cooling chamber 705;

[0075] S3, the output coolant is cooled and then re-input into the cooling chamber 705, so as to achieve the effect of circulating the coolant in the cooling chamber 705;

[0076] S4, after the bellows is formed, before the first mold block 103 and the second mold block 104 are opened, the regulating module adjusts the infusion port 6 to close, the liquid inlet module closes the liquid inlet 508, and the liquid discharge module closes the liquid discharge port 7.

[0077] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0078] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A mold-closing molding device for a prestressed plastic corrugated pipe, comprising a double-chain molding mold (1), wherein the double-chain molding mold (1) comprises a first molding mold chain (101) and a second molding mold chain (102), wherein the first molding mold chain (101) and the second molding mold chain (102) are formed by connecting a plurality of groups of chain plates (105) end to end, wherein the first molding mold chain (101) comprises a first mold block (103) fixedly arranged on the outside of the chain plate (105), and the second molding mold chain (102) comprises a second mold block (104) fixedly arranged on the outside of the chain plate (105); It is characterized in that A cooling cavity (705) is provided in each of the first mold block (103) and the second mold block (104); an infusion port (6) is provided at the top of the cooling cavity (705); and an adjustment module for adjusting the infusion port (6) to be opened or closed is provided in the infusion port (6); A liquid inlet (508) is provided at the bottom of the cooling cavity (705) of the second mold block (104), and the liquid inlet (508) is connected to a liquid inlet module for inputting external cooling liquid into the cooling cavity (705); a liquid discharge port (7) is provided at the bottom of the cooling cavity (705) of the first mold block (103), and the liquid discharge port (7) is connected to the liquid discharge module for discharging the cooling liquid in the cooling cavity (705); The liquid inlet module comprises an infusion pump (5) fixedly arranged at the bottom of the second mold block (104), the infusion pump (5) being connected to the liquid inlet port (508), and the other end of the infusion pump (5) being connected to the liquid inlet pipe (501); the liquid inlet module also comprises a liquid storage tank (302) arranged at the bottom of the second molding mold chain (102), and the liquid storage tank (302) stores cooling liquid; a lifting tube (502) is slidably sleeved on one end of the liquid inlet pipe (501) away from the infusion pump (5), and the lifting tube (502) is connected to a first lifting part that drives the lifting thereof. The first lifting part comprises a first lifting plate (503) fixedly arranged on both sides of the lifting tube (502); two groups of L-shaped brackets (507) are fixedly arranged at the bottom of the second mold block (104); a first electrode sheet (504) is provided on the side of the L-shaped bracket (507) close to the second mold block (104); a second electrode sheet (505) is provided on the side of the first lifting plates (503) on both sides close to the first electrode sheet (504); the first electrode sheet (504) and the second electrode sheet (505) are electrically connected to the infusion pump (5) through a controller.

2. A mold-jointing molding device for a prestressed plastic corrugated pipe according to claim 1, characterized in that: The regulating module comprises a first plunger (604) slidably embedded in the infusion port (6), the first plunger (604) protruding to the outside of the infusion port (6), a first blind hole (605) being provided on a side of the first plunger (604) away from the cooling cavity (705), and a plurality of groups of first openings (606) communicating with the first blind holes (605) being provided in a circumferential array on a side of the first plunger (604) close to the cooling cavity (705).

3. A mold-jointing molding device for a prestressed plastic corrugated pipe according to claim 2, characterized in that: One end of the first plunger (604) facing the cooling chamber (705) is fixed to the first guide plate (603); Wherein, a first guide rod (601) is fixedly arranged in the cooling cavity (705), a first guide plate (603) is slidably sleeved on the first guide rod (601), and a first spring (602) is provided on the first guide rod (601).

4. A mold-jointing molding device for a prestressed plastic corrugated pipe according to claim 1, characterized in that: A first guide wheel (506) is rotatably arranged at one end of the first lifting plate (503) away from the lifting tube (502), first horizontal guide frames (403) are symmetrically arranged on both sides of the liquid storage tank (302), and first inclined guide frames (404) are symmetrically fixedly arranged at both ends of the first horizontal guide frame (403), and the first inclined guide frames (404) on both sides are respectively inclined towards a direction close to the second mold block (104).

5. A mold-jointing molding device for a prestressed plastic corrugated pipe according to claim 4, characterized in that: A sleeve (405) is also fixedly arranged at the bottom of the second mold block (104); a telescopic rod (406) is slidably inserted and arranged at one end of the sleeve (405) away from the second mold block (104); and the other end of the telescopic rod (406) is fixed to the first lifting plate (503); Wherein, a second spring (407) is provided on the telescopic rod (406).

6. A mold-jointing molding device for a prestressed plastic corrugated pipe according to claim 1, characterized in that: The liquid discharge module comprises a second plunger (701) slidably embedded in the liquid discharge port (7), the second plunger (701) extending to the bottom of the first mold block (103), a second blind hole (703) being provided on a side of the second plunger (701) away from the first mold block (103), and a plurality of groups of second openings (706) connected to the second blind holes (703) being provided in a circumferential array on the second plunger (701); Wherein, the second plunger (701) is connected to a second lifting part that drives it to rise and fall.

7. A mold-jointing molding device for a prestressed plastic corrugated pipe according to claim 6, characterized in that: A collecting box (301) is provided at the bottom of the first molding die chain (101) for collecting discharged coolant; The second lifting part comprises a second lifting plate (702) fixedly arranged on both sides of the second plunger (701); a second guide wheel (402) is rotatably arranged at one end of the second lifting plate (702) away from the second plunger (701); two groups of second horizontal guide frames (4) are symmetrically arranged in parallel on the collection box (301); second inclined guide frames (401) are symmetrically fixedly arranged at both ends of the second horizontal guide frame (4); the second inclined guide frames (401) are inclined in a direction away from the first mold block (103); a second guide rod (708) is also fixedly arranged in the cooling chamber (705); a second guide plate (707) fixed to the second plunger (701) is slidably sleeved on the second guide rod (708); and a third spring (704) is also provided on the second guide rod (708).

8. A method for operating the mold-jointing molding device for a prestressed plastic corrugated pipe according to any one of claims 1 to 7, characterized in that: The steps include: The first molding die chain (101) and the second molding die chain (102) respectively drive the first die block (103) and the second die block (104) to transmit synchronously; When the first mold block (103) and the second mold block (104) are closed and connected, the adjustment module adjusts the infusion ports (6) on the cooling chambers (705) on both sides to be in a connected state, the liquid inlet module simultaneously opens the liquid inlet port (508) to input the external cooling liquid into the cooling chamber (705) through the liquid inlet port (508), and the liquid discharge module opens the liquid discharge port (7) to discharge the cooling liquid in the cooling chamber (705); The outputted coolant is cooled and then re-input into the cooling chamber (705); After the bellows is formed, before the first mold block (103) and the second mold block (104) are opened, the regulating module regulates the infusion port (6) to close, the liquid inlet module closes the liquid inlet (508), and the liquid discharge module closes the liquid discharge port (7).

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