Search

EP-4741146-A1 - PRESSURIZING DEVICE AND VULCANIZER

EP4741146A1EP 4741146 A1EP4741146 A1EP 4741146A1EP-4741146-A1

Abstract

Provided are a pressurizing device and a vulcanizing machine. The pressurizing device is configured to provide a mold clamping force for a mold. The pressurizing device includes a base (1), multiple lower pull rods (2), multiple upper pull rods (3), a cross beam (4), and a nitrogen supply assembly (9). The provided pressurizing device in this application applies pressure to the upper side of the mold through a movement member (42) so that the mold clamping force is provided for the mold. Compared with the mode of applying pressure to the lower side of the mold upward through a force-applying oil cylinder in the related art, the pressurizing device does not need to overcome the gravity of the mold and related parts. Thus, the performance requirement on the parts providing the pressure can be reduced, thereby enabling the reduction of the use cost.

Inventors

  • HUANG, Guiqiang
  • ADDANKI, Siva
  • LIU, BAOLONG

Assignees

  • Arp Technologies (Suzhou) Co., Ltd.

Dates

Publication Date
20260513
Application Date
20250630

Claims (10)

  1. A pressurizing device configured to provide a mold clamping force for a mold and comprising: a base (1) configured to bear the mold; a plurality of lower pull rods (2) distributed on a peripheral side of the base (1); a plurality of upper pull rods (3) detachably connected to the plurality of lower pull rods (2) in a one-to-one correspondence; a cross beam (4) disposed on the plurality of upper pull rods (3) and located above the base (1); wherein the cross beam (4) comprises a movement groove (41) and a movement member (42), the cross beam (4) is provided with the movement groove (41) along a vertical direction, a groove opening of the movement groove (41) faces downward, the movement member (42) is in a sliding fit with the movement groove (41), the movement member (42) is sealingly connected to a groove wall of the movement groove (41), and a movement cavity (43) is formed between the movement member (42) and the groove wall of the movement groove (41); and a nitrogen supply assembly (9), wherein the nitrogen supply assembly (9) is configured to supply nitrogen gas into the movement cavity (43) so as to push the movement member (42) to move downward along the movement groove (41).
  2. The pressurizing device according to claim 1, further comprising: a hot plate (5) disposed between the movement member (42) and the mold, wherein the movement member (42) transmits pressure to an upper side of the mold through the hot plate (5), and the hot plate (5) is configured to isolate heat generated by the mold.
  3. The pressurizing device according to claim 2, further comprising: a limit assembly (6) configured to limit a maximum movement distance of the movement member (42).
  4. The pressurizing device according to claim 3, wherein the limit assembly (6) comprises: a movement hole (61) penetrating through and disposed on the cross beam (4) along the vertical direction; and a limit bolt (62), wherein the limit bolt (62) is capable of passing through the movement hole (61) and is in a clearance fit with the movement hole (61), a head of the limit bolt (62) is capable of abutting against an upper side of the cross beam (4), a maximum distance between the head of the limit bolt (62) and the upper side of the cross beam (4) is smaller than the maximum movement distance of the movement member (42), and a tail of the limit bolt (62) is screwed to the hot plate (5).
  5. The pressurizing device according to claim 4, wherein the limit assembly (6) further comprises: a connecting hole (63) penetrating through and disposed on the cross beam (4) along the vertical direction; an assembly hole (64) penetrating through and disposed on the hot plate (5) along the vertical direction, wherein the assembly hole (64) is a step hole; and a connecting bolt (65) capable of sequentially penetrating through the connecting hole (63) and the assembly hole (64), wherein the connecting bolt (65) is in a clearance fit with each of the connecting hole (63) and the assembly hole (64), the connecting bolt (65) comprises an abutment surface (651), and a tail of the connecting bolt (65) is screwed to the upper side of the mold and causes the abutment surface (651) to abut against a step surface of the assembly hole (64).
  6. The pressurizing device according to claim 1, further comprising: a quick-release assembly (7), wherein the quick-release assembly (7) is disposed between a lower pull rod (2) of the plurality of lower pull rods (2) and an upper pull rod (3) of the plurality of upper pull rods (3) to control connection or disconnection between the lower pull rod (2) and the upper pull rod (3).
  7. The pressurizing device according to claim 6, wherein the quick-release assembly (7) comprises: a bayonet head (71) disposed at a lower end of the upper pull rod (3); and a bayonet groove (72) disposed at an upper end of the lower pull rod (2), wherein the bayonet head (71) is capable of being engaged with and connected to the bayonet groove (72); wherein the lower pull rod (2) is rotatably disposed on the base (1), and an adjustment gap is reserved between the bayonet head (71) and the bayonet groove (72) to ensure that the lower pull rod (2) is rotatable.
  8. The pressurizing device according to claim 1, further comprising: an adjustment assembly (8) disposed between the plurality of upper pull rods (3) and the cross beam (4), wherein the adjustment assembly (8) is configured to adjust positions of the cross beam (4) on the plurality of upper pull rods (3).
  9. The pressurizing device according to claim 8, wherein the adjustment assembly (8) comprises: a plurality of adjustment nuts (81), wherein the plurality of adjustment nuts (81) are in a threaded fit with the plurality of upper pull rods (3) in a one-to-one correspondence, and the plurality of adjustment nuts (81) are connected to a plurality of positions of the cross beam (4), respectively; transmission chains (82) sleeved on the plurality of adjustment nuts (81) and engaged with the plurality of adjustment nuts (81); and a servo motor (83) disposed on the cross beam (4), wherein the servo motor (83) is configured to drive the transmission chains (82) to reciprocate.
  10. A vulcanizing machine, comprising the pressurizing device according to any one of claims 1 to 9 and a mold, wherein the pressurizing device is configured to provide a mold clamping force for the mold.

Description

This application claims priority to Chinese Patent Application No. 202411204682.8 filed with the China National Intellectual Property Administration (CNIPA) on Aug. 30, 2024, the disclosure of which is incorporated herein by reference in its entirety. TECHNICAL FIELD The present application relates to the technical field of vulcanizing equipment, for example, a pressurizing device and a vulcanizing machine. BACKGROUND At present, tires are generally vulcanized through a vulcanizing machine. To ensure that a mold is provided with a sufficient mold clamping force, a pressurizing device is typically required to apply pressure to the mold in the vulcanization stage, so as to ensure the vulcanization quality. A pressurizing device in the related art generally includes a force-applying oil cylinder disposed on a base. A lower support plate is pushed upward through the force-applying oil cylinder to apply a certain acting force to a lower mold, so as to provide a clamping force for the mold to vulcanize a tire. However, when applying the force, the force-applying oil cylinder not only needs to provide the clamping force for the mold to vulcanize the tire, but also needs to overcome the gravity of the lower support plate, the mold, and the tire. Therefore, a relatively high performance requirement is imposed on the force-applying oil cylinder, and the use cost is relatively high. That is, the oil cylinder and a hydraulic station adopted by the pressurizing device in the related art are costly. In addition, hydraulic oil has a leakage risk, and hydraulic oil leakage may pollute the equipment and the environment. SUMMARY The present application provides a pressurizing device and a vulcanizing machine to solve the problems of high costs of an oil cylinder and a hydraulic station adopted by a pressurizing device in the related art, the risk of hydraulic oil leakage, and the pollution of the equipment and the environment caused by the hydraulic oil leakage. An embodiment of the present application provides a pressurizing device configured to provide a mold clamping force for a mold. The pressurizing device includes a base, multiple lower pull rods, multiple upper pull rods, a cross beam, and a nitrogen supply assembly. The base is configured to bear the mold. The multiple lower pull rods are distributed on the peripheral side of the base. The multiple upper pull rods are detachably connected to the multiple lower pull rods in a one-to-one correspondence. The cross beam is disposed on the multiple upper pull rods and located above the base. The cross beam includes a movement groove and a movement member, the cross beam is provided with the movement groove along a vertical direction, a groove opening of the movement groove faces downward, the movement member is in a sliding fit with the movement groove, the movement member is sealingly connected to a groove wall of the movement groove, and a movement cavity is formed between the movement member and the groove wall of the movement groove. The nitrogen supply assembly is configured to supply nitrogen gas into the movement cavity so as to push the movement member to move downward along the movement groove. In some embodiments, the pressurizing device further includes a hot plate. The hot plate is disposed between the movement member and the mold, where the movement member transmits pressure to the upper side of the mold through the hot plate, and the hot plate is configured to isolate heat generated by the mold. In some embodiments, the pressurizing device further includes a limit assembly. The limit assembly is configured to limit the maximum movement distance of the movement member. In some embodiments, the limit assembly includes a movement hole and a limit bolt. The movement hole penetrates through and is disposed on the cross beam along the vertical direction. The limit bolt is capable of passing through the movement hole and is in a clearance fit with the movement hole, the head of the limit bolt is capable of abutting against the upper side of the cross beam, the maximum distance between the head of the limit bolt and the upper side of the cross beam is smaller than the maximum movement distance of the movement member, and the tail of the limit bolt is screwed to the hot plate. In some embodiments, the limit assembly further includes a connecting hole, an assembly hole, and a connecting bolt. The connecting hole penetrates through and is disposed on the cross beam along the vertical direction. The assembly hole penetrates through and is disposed on the hot plate along the vertical direction, where the assembly hole is a step hole. The connecting bolt is capable of sequentially penetrating through the connecting hole and the assembly hole, where the connecting bolt is in a clearance fit with each of the connecting hole and the assembly hole, the connecting bolt includes an abutment surface, and the tail of the connecting bolt is screwed to the upper side of the mold an