A sealing ring air jack mold

Abstract

The present invention discloses a sealing ring air-top mold, comprising: a sealing ring lower mold core and a sealing ring upper mold core pressed on the upper part of the sealing ring lower mold core, with a forming cavity left between the sealing member upper mold core and the sealing member lower mold core for the formation of the sealing ring product; characterized in that: at least one ring of annular exhaust grooves is formed on the outer edge of the sealing ring lower mold core, and at least one air inlet hole is formed in the inner ring of the sealing ring lower mold core. The present invention improves the production efficiency of the sealing ring, reduces the production cost of the sealing ring, and eliminates the potential safety hazard of scalding. The design of the present invention is reasonable, the mold life is high, and the production efficiency is fast.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing ring molds, and specifically to a gas jack mold for sealing rings. Background Art

[0002] In the existing production process of sealing rings, the degree of automation of the vulcanization process is low. After the vulcanization operation of the sealing ring is completed under high temperature and high pressure, the sealing ring adheres to the mold and is not easy to take out.

[0003] Vulcanization workers need to use the method of manually taking out the parts and blowing air with an air gun to cool down to take out the seal from the mold cavity. The sealing ring is soft, thin-walled and small in volume. Using this method, it is easy to tear the sealing ring and fold the skeleton edge, etc., resulting in scrapping, and there is a safety hazard of scalding for workers. Taking out the parts takes a long time, resulting in low production efficiency and high production costs of the sealing ring. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the purpose of the present invention is to provide a new type of gas jack mold for sealing rings. Specifically, through the gas jack of the sealing ring, it is easier to use the gas jack to eject the sealing ring under the condition of depth and airtight vacuum state, so as to realize the smooth demolding of the sealing ring product.

[0005] In order to achieve the above-mentioned invention purpose, the technical solution adopted by the present invention is as follows:

[0006] A gas jack mold for sealing rings, comprising:

[0007] A lower mold core for sealing rings and an upper mold core for sealing rings pressed on the upper part of the lower mold core for sealing rings. A molding cavity is left between the upper mold core for the seal and the lower mold core for the seal for the formation of the sealing ring product; among them;

[0008] At least one ring-shaped exhaust groove is opened on the outer edge of the lower mold core for sealing rings, and at least one air inlet hole is opened on the inner ring of the lower mold core for sealing rings.

[0009] In a preferred embodiment of the present invention, a first overflow groove and a second overflow groove are respectively opened at the head and tail positions of the sealing ring product in the molding cavity, so that the excess rubber can overflow along the first overflow groove and the second overflow groove, avoiding the thickness deviation of the sealing ring product and causing flash.

[0010] In a preferred embodiment of the present invention, the middle part of the lower mold core for sealing rings and the middle part of the upper mold core for sealing rings are matched with each other by a concave-convex structure, and the first overflow groove is opened on the mating surface where the middle part of the lower mold core for sealing rings and the middle part of the upper mold core for sealing rings are matched.

[0011] In a preferred embodiment of the present invention, the first overflow groove is in a ring shape.

[0012] In a preferred embodiment of the present invention, an inclined surface is provided on the mold core of the sealing ring, and the inclined surface is located between the molding cavity and the annular exhaust groove, and the second glue overflow groove is located below the inclined surface.

[0013] In a preferred embodiment of the present invention, the second glue overflow groove is of an annular structure.

[0014] In a preferred embodiment of the present invention, an O-ring annular groove is provided at the outer peripheral bottom of the lower mold core of the sealing ring, and an O-ring is installed in the O-ring annular groove, so that the lower mold core of the sealing ring and the fixed template of the lower mold core of the sealing ring are assembled to form a sealing structure.

[0015] The beneficial effects of the present invention are as follows:

[0016] Improve the production efficiency of the sealing ring, reduce the production cost of the sealing ring, and eliminate the safety hazard of scalding. The design of the present invention is reasonable, the mold life is high, and the production efficiency is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram (cross-sectional view) of the present invention.

[0018] Figure 2 It is a schematic diagram of the sealing ring product of the present invention.

[0019] Figure 3 It is a schematic structural diagram (top view) of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] The following further describes the structure and working principle of the present invention through specific embodiments:

[0021] As Figure 1 , 3 shown, the sealing ring air top mold 100 includes a lower mold core 110 of the sealing ring and an upper mold core 120 of the sealing ring pressed on the upper part of the lower mold core 110 of the sealing ring. A molding cavity 130 is left between the upper mold core 120 of the sealing ring and the lower mold core 110 of the sealing ring for the sealing ring product 140 to be molded.

[0022] A plurality of circles of annular exhaust grooves 150 are opened on the outer edge 111 of the lower mold core 110 of the sealing ring. And the material of the lower mold core 110 of the sealing ring is preferably a material with moderate thickness and heat and pressure resistance, so that after demolding, compressed air is evenly discharged through the annular exhaust grooves 150.

[0023] Meanwhile, 8 air inlet holes 160 are provided in the inner ring 112 of the lower mold core 110 of the sealing ring; the 8 air inlet holes 160 are arranged at intervals in a ring along the inner ring 112. The number of air inlet holes 160 should not be too many, as too many will cause the air pressure of the compressed air to decrease, thereby reducing the ejection force and making the demolding difficult. If the number is too small, the air volume requirement cannot be met.

[0024] The arrangement distance of the 8 air inlet holes 160 and their positions in the inner ring of the lower mold core 110 of the sealing ring should be appropriate. Improper arrangement distance and position selection will lead to difficult demolding and cause the sealing ring product 140 to stick to the lower mold core 110 of the sealing ring. Therefore, the applicant designed to provide 8 air inlet holes 160 arranged at intervals in a ring on the inner ring 112 of the lower mold core 110 of the sealing ring. Because the applicant found through a large number of experimental studies that such positions and quantities can enable the sealing ring 140 to be ejected smoothly.

[0025] Specifically, after vulcanization is completed, the compressed air enters through the air inlet holes 160 and is discharged through the annular exhaust groove 150, forming an air cushion between the lower mold core 110 of the sealing ring and the sealing ring product 140.

[0026] During demolding, the compressed air enters the inner cavity 130 through the air inlet holes 160 and is discharged through the annular exhaust groove 150, creating a gap on the mold surface of the forming cavity 130, that is, (between the sealing ring product 140 and the lower mold core 110 of the sealing ring). Furthermore, an air cushion is formed between the sealing ring 140 and the lower mold core 110 of the sealing ring through this gap, enabling the compressed air to smoothly eject the sealing ring 120 from the core within a predetermined time.

[0027] In the forming cavity 130, a glue overflow groove 171 and a glue overflow groove 172 are respectively provided at the head and tail positions of the sealing ring product 140. Both the glue overflow groove 171 and the glue overflow groove 172 are of annular structure. Specifically, the middle part of the lower mold core 110 of the sealing ring and the middle part of the upper mold core 120 of the sealing ring are matched with each other by a concave-convex structure. For example, a protrusion 113 is provided in the middle part of the lower mold core 110 of the sealing ring, and a groove 121 is provided in the middle part of the upper mold core 120 of the sealing ring. The protrusion 113 and the groove 121 are positioned and matched, enabling the lower mold core 110 of the sealing ring and the upper mold core 120 of the sealing ring to be positioned and matched. The glue overflow groove 171 is provided on the mating surface 114 where the middle parts of the lower mold core 110 of the sealing ring and the upper mold core 120 of the sealing ring are mated.

[0028] On the upper mold core 120 of the sealing ring, an inclined surface 120a is provided. The inclined surface 120a is located between the forming cavity 130 and the annular exhaust groove 150, and the glue overflow groove 172 is located below the inclined surface 120a.

[0029] The provision of the glue overflow groove 171 and the glue overflow groove 172 enables the excess rubber to overflow along with the glue overflow groove 171 and the glue overflow groove 172, avoiding product thickness out-of-tolerance and flash formation.

[0030] In addition, an O-ring annular groove 180 is provided at the outer peripheral bottom 114 of the lower mold core 110 of the sealing ring. An O-ring is installed in the O-ring annular groove 180, so that the lower mold core 110 of the sealing ring is assembled with the fixed template of the lower mold core of the sealing ring (not shown in the figure) to form a sealing structure.

[0031] Due to the above structure, the working principle of the present invention is as follows:

[0032] When the sealing ring 140 is vulcanized and formed, the vulcanizing machine moves the mold to open the mold.

[0033] The upper and lower templates (not shown in the figure) drive the upper mold core 120 of the seal and the lower mold core 110 of the seal to separate respectively.

[0034] When the upper mold core 120 of the seal and the lower mold core 110 of the seal are separated by a certain distance; compressed air is blown out through the air inlet hole 160 of the lower mold core 110 of the seal to generate a gap between the sealing ring 140 and the seal product 140 and the lower mold core 110 of the seal, and then the entire gap is filled to form an air cushion, thereby ejecting the sealing ring 140. At the same time, the compressed air is evenly discharged from the annular exhaust groove 150.

[0035] The advantages of the present invention are as follows:

[0036] The non-rigid demolding method of pneumatically ejecting the seal is adopted, effectively avoiding the defect that rigid pushing demolding is easy to produce scars. The application of the air ejector eliminates the trouble in the design and manufacture of the ejector pins of the mold.

Claims

1. A sealing ring air jack mold, which is as follows: A lower mold core of a sealing ring and an upper mold core of a sealing ring pressing on the upper part of the lower mold core of the sealing ring, and a molding cavity is left between the upper mold core of the sealing ring and the lower mold core of the sealing ring for the molding of the sealing ring product; characterized in that ; At least one ring of annular exhaust grooves is opened on the outer edge of the lower mold core of the sealing ring, and eight air inlet holes are opened at intervals along the inner ring of the lower mold core of the sealing ring; A first overflow groove and a second overflow groove are respectively opened at the head and tail positions of the sealing ring product in the molding cavity; The middle part of the lower mold core of the sealing ring and the middle part of the upper mold core of the sealing ring are matched with each other by a concave-convex structure, and a first overflow groove with an annular structure is opened on the mating surface where the middle part of the lower mold core of the sealing ring and the middle part of the upper mold core of the sealing ring are matched; A slope is provided on the upper mold core of the sealing ring, the slope is located between the molding cavity and the annular exhaust groove, and a second overflow groove with an annular structure is located below the slope; An O-ring annular groove is provided at the bottom of the outer periphery of the lower mold core of the sealing ring, and an O-ring is installed in the O-ring annular groove so that the lower mold core of the sealing ring and the fixed template of the lower mold core of the sealing ring are assembled to form a sealing structure.

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