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CN-224224293-U - Exhaust valve structure of plastic mold

CN224224293UCN 224224293 UCN224224293 UCN 224224293UCN-224224293-U

Abstract

The utility model discloses a plastic mold exhaust valve structure, which comprises a jacket and a core, wherein the jacket is provided with a through inner hole, the upper part of the inner hole is provided with a conical surface opening, the core is coaxially arranged in the inner hole of the jacket, the upper part of the core is provided with a plugging convex head matched with the conical surface opening of the jacket, the conical surface opening of the jacket or the plugging convex head of the core is provided with a buffer body, the lower part of the core is provided with a spring, and the spring jacks up the core in a normal state to enable the plugging convex head of the core and the conical surface opening of the jacket to form a clearance channel. According to the exhaust valve structure of the plastic mold, the buffer body is additionally arranged, so that impact vibration of the core and the outer sleeve can be absorbed, direct friction between metal and metal is reduced, the service life of the exhaust valve is prolonged, collision and damage caused by contact surfaces of the core and the metal are reduced, meanwhile, the buffer body can further play a role in sealing, rubber materials cannot enter an inner hole of the outer sleeve, and the molding quality of products is improved.

Inventors

  • OU WEIPING

Assignees

  • 东莞市百通精密模具制造有限公司

Dates

Publication Date
20260512
Application Date
20250425

Claims (5)

  1. 1. The utility model provides a plastic mould discharge valve structure, includes overcoat (1) and core (2), its characterized in that, overcoat (1) is equipped with the hole that link up, the upper portion of hole is equipped with conical surface opening (11), core (2) are coaxial to be set up in the hole of overcoat (1), the upper portion of core (2) is equipped with shutoff projection (21) with overcoat conical surface opening matched with, be provided with the buffer body on the shutoff projection (21) of conical surface opening (11) of overcoat (1) or core (2), the lower part of core (2) is provided with spring (3), spring (3) jack up core (2) under the normality, make shutoff projection (21) of core (2) and conical surface opening (11) of overcoat (1) form the clearance passageway; The high-temperature-resistant buffer colloid (4) is arranged on the conical surface opening (11) of the outer sleeve (1) or the plugging raised head (21) of the core (2), and the high-temperature-resistant buffer colloid (4) is arranged around the conical surface of the plugging raised head (21) in a circle.
  2. 2. The exhaust valve structure of the plastic mould according to claim 1, wherein a fit clearance of 0.05-0.1mm is reserved between the outer diameter of the core (2) and the inner hole of the outer sleeve (1).
  3. 3. A plastic mold vent valve structure according to claim 1, wherein the cone angle of the cone opening (11) of the outer sleeve (1) is 30 ° -60 °, and the plugging projection (21) of the core (2) has a cone angle matching therewith.
  4. 4. The plastic mold exhaust valve structure according to claim 1, wherein a spring clamping groove (22) is arranged at the lower part of the core (2), the spring clamping groove (22) is of an annular groove structure, the depth of the spring clamping groove is greater than 1/2 of the diameter of a spring wire, the upper end of the spring (3) is abutted in the spring clamping groove (22), and the lower end of the spring (3) is abutted on the upper part of the mold supporting plate (5).
  5. 5. The exhaust valve structure of plastic mould according to claim 4, characterized in that the upper part of the mould supporting plate (5) is provided with an exhaust groove (6) communicated with the inner hole of the outer sleeve (1).

Description

Exhaust valve structure of plastic mold Technical Field The utility model relates to the technical field of molds, in particular to an exhaust valve structure of a plastic mold. Background In the plastic mold forming process, the exhaust valve is a key component for ensuring the exhaust gas during the filling of molten plastic and avoiding the generation of bubbles or material shortage of products. The utility model discloses an "discharge valve of tire mould", bulletin number is CN207893201U, this patent document discloses a discharge valve of tire mould, including the valve casing and wear the spool in the valve casing hole, the spool front and back both ends stretch out the valve casing, the spool front end is provided with the shutoff head, shutoff head and valve casing hole front end are provided with the sealed conical surface of mutually supporting, the spool rear end is provided with the stopper that the biggest external diameter is greater than valve casing hole rear end diameter, be equipped with ball portion on the inner wall of valve casing, ball portion includes at least one row of ball, every row of ball includes a plurality of balls along the inner wall circumference evenly distributed of valve casing, be equipped with the sleeve on the valve rod, the sleeve is hugged closely with ball portion, can break away from ball portion when the sleeve just in time break away from ball portion with the valve casing hole front end conical surface incompletely, the cover is equipped with compression spring on the valve rod, compression spring front and back both ends are pressed respectively on the step of sleeve and valve casing hole rear end. The exhaust valve is characterized in that the front end of the valve column is always contacted with the valve shell, and the contact surface of the valve column and the valve shell is damaged along with the lapse of service time, so that the function failure is caused, and a buffer structure is lacked between the valve column and the valve shell. Therefore, there is a need for a plastic mold vent valve structure. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a plastic mold exhaust valve structure to solve the problems of the background art. In order to achieve the above purpose, the utility model is realized by the following technical scheme: The utility model provides a plastic mould discharge valve structure, includes overcoat and core, the overcoat is equipped with the hole that link up, the upper portion of hole is equipped with the conical surface opening, the core is coaxial to be set up in the hole of overcoat, the upper portion of core be equipped with overcoat conical surface opening matched with shutoff protruding head, be provided with the buffer body on the shutoff protruding head of conical surface opening of overcoat or core, the lower part of core is provided with the spring, jack-up the core under the spring normality, make the shutoff protruding head of core and the conical surface opening of overcoat form the clearance passageway. Further, a fit clearance of 0.05-0.1mm is reserved between the outer diameter of the core and the inner hole of the outer sleeve. Further, the cone opening cone angle of the outer sleeve is 30 degrees to 60 degrees, and the plugging convex head of the core has a cone angle matched with the cone opening cone angle. Furthermore, the high-temperature-resistant buffer colloid is arranged on the conical surface opening of the outer sleeve or the plugging convex head of the core, and the high-temperature-resistant buffer colloid is arranged around the conical surface of the plugging convex head. Further, the lower part of the core is provided with a spring clamping groove, the spring clamping groove is of an annular groove structure, the depth of the spring clamping groove is greater than 1/2 of the wire diameter of the spring, the upper end of the spring is abutted in the spring clamping groove, and the lower end of the spring is abutted on the upper part of the die supporting plate. Further, an exhaust groove communicated with the inner hole of the outer sleeve is formed in the upper portion of the die supporting plate. Compared with the prior art, the utility model has the following beneficial effects: The utility model provides a plastic mould discharge valve structure, including overcoat and core, the overcoat is equipped with the hole that link up, the upper portion of hole is equipped with the conical surface opening, the core is coaxial to be set up in the hole of overcoat, the upper portion of core is equipped with the shutoff protruding head with overcoat conical surface opening matched with, set up the buffer body on the shutoff protruding head of the conical surface opening of overcoat or core, this buffer body can absorb the impact vibration of core and overcoat, reduce metal and metal direct friction, extension discharge valve life, reduce the contact surface be