CN212554637U

CN212554637U - Mold structure of proportional valve piston rubber part

Info

Publication number: CN212554637U
Application number: CN202020988840.4U
Authority: CN
Inventors: 曾愉深; 芦成; 王志敏; 彭乾帅; 赵志坚
Original assignee: Xingyi Rubber Ningbo Co ltd
Current assignee: Xingyi Rubber Ningbo Co ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2021-02-19
Anticipated expiration: 2030-06-03

Abstract

The utility model belongs to the technical field of the valve, concretely relates to mould structure. The mold structure of the proportional valve piston rubber part comprises a mold main body, wherein the mold main body comprises a fixed mold and a movable mold, a lower mold cavity in the fixed mold is a cavity type corresponding to the lower half structure of the piston rubber part, an upper mold cavity in the movable mold is a cavity type corresponding to the upper half structure of the piston rubber part, so that the mold main body is a middle radial symmetric mold opening structure of the piston rubber part, and the middle part of the piston rubber part is a positioning surface. The parting mode of the utility model ensures that the sealing surface does not generate burrs and the sealing performance is not influenced; the middle positioning mode and allowance are added, so that the die does not need to be repaired when the length between the piston rubber pieces is changed; the circumferential clearance also reduces wear between the piston rubber members.

Description

Mold structure of proportional valve piston rubber part

Technical Field

The utility model belongs to the technical field of the valve, concretely relates to mould structure.

Background

In proportional valves, the accuracy of the piston is one of the important devices for reliable operation of the valve. The piston rubber part of the prior proportional valve is generally adopted as shown in figure 1, a die comprises a fixed die 1 and a movable die 2, a lower die cavity is arranged in the fixed die 1, and an upper die cavity is arranged in the movable die 2. The mold is opened symmetrically on two sides in the axial direction of the sealing surface, so that the lower mold cavity and the upper mold cavity respectively correspond to the cavity types of the two axial side structures of the piston rubber part 3. The die is opened in a mode that no allowance is left in the die, and the upper bottom surface and the lower bottom surface are used for positioning. In this way, there are problems as follows:

1. the sealing performance is affected by the flash generated on the sealing surface;

2. the mould is required to be repaired when the piston piece is changed without allowance;

3. too small a gap between the two sides will cause wear.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the mould structure for the piston rubber spare of current proportional valve produces the overlap easily, does not have the surplus and causes the technical problem of wearing and tearing easily, and aim at provides a mould structure of proportional valve piston rubber spare.

Mould structure of proportional valve piston rubber spare, including the mould main part, the mould main part includes the cover half and is located the movable mould of cover half top, lower die cavity in the cover half is the chamber type that piston rubber spare the latter half structure corresponds, last die cavity in the movable mould does the chamber type that piston rubber spare first half structure corresponds causes the mould main part does the radial symmetry die sinking structure in middle part of piston rubber spare, the middle part of piston rubber spare is the locating surface.

The utility model discloses abandoned the structure of traditional mould for piston rubber spare, set up a new die joint, do not directly seal the face parting from top to bottom, but adopt the mode of intermediate location for sealed face can not produce deckle edge, does not influence the leakproofness.

The axial length of the lower die cavity is longer than that of the lower half structure of the piston rubber part, so that a gap is reserved below the lower die cavity.

The gap below the lower die cavity is 0.4mm-0.6mm, preferably 0.5 mm.

The outer diameter of the upper part of the lower die cavity is larger than the lower half part structure of the piston rubber part, so that a gap is reserved between the die main body and the piston rubber part. The circumferential clearance also reduces wear between the piston rubber members.

The axial length of the upper die cavity is longer than that of the upper half structure of the piston rubber piece, so that a gap is reserved above the upper die cavity. Because the utility model discloses a mode of middle location leaves the surplus in upper and lower bottom surface for need not to repair the mould when changing length between the piston.

The gap above the upper die cavity is 0.4mm-0.6mm, preferably 0.5 mm.

The utility model discloses an actively advance the effect and lie in: the utility model discloses a mould structure of proportional valve piston rubber spare has following advantage:

1. the new parting mode ensures that no burrs are generated on the sealing surface and the sealing performance is not influenced;

2. the middle positioning mode and allowance are added, so that the die does not need to be repaired when the length between the piston rubber pieces is changed;

3. the circumferential clearance also reduces wear between the piston rubber members.

Drawings

FIG. 1 is a schematic view of a prior art mold;

fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further explained with reference to the specific drawings.

Referring to fig. 2, proportional valve piston rubber spare's mould structure, including the mould main part, the mould main part includes cover half 1 and the movable mould 2 that is located cover half 1 top, and the lower die cavity in the cover half 1 is the corresponding chamber type of piston rubber spare 3 latter half structure, and the last die cavity in the movable mould 2 is the chamber type that piston rubber spare 3 first half structure corresponds, causes the mould main part to be the radial symmetry die sinking structure in middle part of piston rubber spare 3, and the middle part of piston rubber spare 3 is the locating surface. The utility model discloses abandoned the structure of 3 moulds of traditional piston rubber spare, set up a new die joint, do not directly seal the face parting from top to bottom, but adopt the mode of intermediate location for sealed face can not produce deckle edge, does not influence the leakproofness.

The axial length of the lower cavity is longer than the length of the lower half structure of the piston rubber member 3, so that a gap 11 is left below the lower cavity. The gap 11 below the lower die cavity is 0.4mm-0.6mm, preferably 0.5 mm. The outer diameter of the upper part of the lower die cavity is larger than the lower half part structure of the piston rubber part 3, so that a gap 12 is reserved between the die main body and the piston rubber part 3. The circumferential gap 12 also reduces wear between the piston rubber 3.

The axial length of the upper cavity is longer than the length of the upper half structure of the piston rubber member 3 so that a gap 21 is left above the upper cavity. Because the utility model discloses a mode of middle location leaves the surplus in upper and lower bottom surface for need not to repair the mould when changing length between the piston. The gap above the upper mould cavity is 0.4mm-0.6mm, preferably 0.5 mm.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Mould structure of proportional valve piston rubber spare, including the mould main part, the mould main part includes the cover half and is located the movable mould of cover half top, its characterized in that, lower die cavity in the cover half is the chamber type that piston rubber spare latter half structure corresponds, last die cavity in the movable mould does the chamber type that piston rubber spare first half structure corresponds causes the mould main part does the radial symmetry die sinking structure in middle part of piston rubber spare, the middle part of piston rubber spare is the locating surface.

2. The mold structure for a piston rubber member of a proportional valve according to claim 1, wherein the lower cavity has an axial length longer than that of the lower half of the piston rubber member so that a gap is left below the lower cavity.

3. The mold structure for the piston rubber member of the proportional valve according to claim 2, wherein the clearance below the lower cavity is 0.4mm to 0.6 mm.

4. The mold structure for a piston rubber member of a proportional valve according to claim 3, wherein the clearance below the lower cavity is 0.5 mm.

5. The mold structure for a piston rubber member of a proportional valve according to claim 2, wherein the axial length of the upper cavity is longer than the length of the upper half structure of the piston rubber member, so that a gap is left above the upper cavity.

6. The mold structure for the piston rubber member of the proportional valve according to claim 5, wherein the clearance above the upper cavity is 0.4mm to 0.6 mm.

7. The mold structure for a piston rubber member of a proportional valve according to claim 6, wherein the clearance above the upper cavity is 0.5 mm.

8. The mold structure of the proportional valve piston rubber member of any one of claims 1 to 7, wherein the upper outer diameter of the lower cavity is larger than the lower half of the piston rubber member, so that a gap is left between the mold body and the piston rubber member.