CN212331731U

CN212331731U - Lubricating oil seal device for injection molding machine

Info

Publication number: CN212331731U
Application number: CN202020451373.1U
Authority: CN
Inventors: 刘松
Original assignee: ZHEJIANG BORCH MACHINERY CO LTD
Current assignee: ZHEJIANG BORCH MACHINERY CO LTD
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2021-01-12
Anticipated expiration: 2030-04-01

Abstract

The utility model discloses a lubricating oil seal device for injection molding machine, first sealed retaining ring sets up on the base, the second sealed retaining ring sets up on the first sealed retaining ring, wherein, first sealed retaining ring with be provided with seal assembly between the second sealed retaining ring, seal assembly is including setting up arch on the first sealed retaining ring is in with the setting recess on the second sealed retaining ring. Has the advantages that: a sealing assembly is arranged between the first sealing retainer ring and the second sealing retainer ring and comprises a protrusion arranged on the first sealing retainer ring and a groove arranged on the second sealing retainer ring. The bulge and the groove are arranged in a gap between the first sealing retainer ring and the second sealing retainer ring, and lubricating oil in the base can be prevented from leaking out of the gap by the bulge and the groove. And the sealing effect of the device can be further improved by utilizing the outer sealing layer.

Description

Lubricating oil seal device for injection molding machine

Technical Field

The utility model relates to a lubricating oil seal device for injection molding machine belongs to the injection molding machine field

Background

At present, the injection device of a common hydraulic injection molding machine is divided into double-cylinder injection and single-cylinder injection, a screw rod of a single-cylinder injection system and an injection oil cylinder are arranged in a line, the centering stress performance is good, the inertia of a moving part is extremely small, the start and stop of the injection are more sensitive and accurate, the injection period is reduced to the maximum extent, the injection control precision is improved, and the repetition precision of products is greatly improved. The single-cylinder one-line injection plasticizing mechanism has small starting resistance, reduces energy consumption, improves starting sensitivity and can meet the requirements of the market on high-speed and precise energy-saving injection molding, however, the single-cylinder structure injection cylinder of the injection molding machine has easy oil leakage, so the single-cylinder one-line injection plasticizing mechanism has special requirements on a sealing oil leakage structure.

The chinese utility model patent document with publication number "CN 208858924U" discloses "a lubricating oil sealing device of injection molding machine transmission shaft" the device oil seal body assembly, lubricating oil assembly and protection assembly, the oil seal body assembly includes an oil seal whole, an inner seal ring, a fixing clamp shaft and a high temperature resistant coating, the oil seal whole is a hollow annular structure, the inner seal ring is located at the inner side of the oil seal whole and is fixedly connected with the oil seal whole, the fixing clamp shaft is located at the inner side of the top end of the oil seal whole;

although the device, the auxiliary seal cover can in time pour lubricating oil to the lubricating oil holding tank through the sealing retainer ring, further makes the holistic user state of oil blanket more stable, improves holistic safety in utilization and the stability of oil blanket. However, the structure of the sealing retainer ring of the device is simple in Thailand, and the internal oil can leak out of the sealing retainer ring, so that the service life of the device is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel oil blanket device, can effectively solve the unable effectual problem of solving the oil leakage of retaining ring among the prior art.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme: the lubricating oil sealing device is arranged on the outer side of a plasticizing screw in the injection molding machine and is used for lubricating the plasticizing screw; an oil seal piece is arranged in the lubricating oil seal device, the oil seal piece comprises a base, a first sealing retainer ring, a second sealing retainer ring and an outer sealing layer, the first sealing retainer ring is arranged on the base, the second sealing retainer ring is arranged on the first sealing retainer ring, and the outer sealing layer is arranged on one side of the first sealing retainer ring and one side of the second sealing retainer ring and clings to the base; and a sealing assembly is arranged between the first sealing retainer ring and the second sealing retainer ring, and comprises a bulge arranged on the first sealing retainer ring and a groove arranged on the second sealing retainer ring.

According to the arrangement, the base is fixed on the injection molding machine and used for integrally fixing the oil seal piece, and the first sealing retainer ring, the second sealing retainer ring and the outer sealing layer are matched with each other to seal oil in the base, so that lubrication of the plasticizing screw in the rotating and propelling process is ensured; the protrusion and the groove are arranged in a gap between the first sealing retainer ring and the second sealing retainer ring, and lubricating oil in the base is prevented from leaking out of the gap.

Further, the shape of the protrusion and the groove is semicircular.

So set up, semicircle form protruding with the recess is easier first retainer ring with cooperate the installation between the second retainer ring.

Furthermore, the corner of the first sealing check ring faces towards the direction of the circle center, and the corner of the second sealing check ring faces towards the opposite direction.

The arrangement is that the first sealing retainer ring is tightly attached to the inner side of the base and the side surface of the base close to the lubricating oil; the second sealing retainer ring is tightly attached to the first sealing retainer ring, and meanwhile, a structure for further improving the sealing effect is provided for the outer sealing layer.

Furthermore, the corner of the first sealing check ring is a round corner, and the corner of the second sealing check ring is a right angle.

With the arrangement, the reason that the corners of the first sealing check ring are set to be round corners is that in the process of mounting the oil seal piece, the first sealing check ring is mounted firstly, so that the first sealing check ring is required to be matched with the base more accurately; the corner of the second gasket ring is a right angle, so that the sealing performance between the second gasket ring and the outer seal layer is improved.

Furthermore, the inner sides of the first sealing retainer ring and the second sealing retainer ring are flat with the outer sides.

Due to the arrangement, one side, close to lubricating oil, of the first sealing retainer ring and one side, close to the lubricating oil, of the second sealing retainer ring are flat, and the lubricating oil can smoothly lubricate the plasticizing screw; the opposite side is convenient the installation of outer sealing layer, on the other hand can improve the sealed effect of device.

Furthermore, the whole outer sealing layer is Z-shaped, and the outer sealing layer comprises an upper ring plate, a vertical ring plate and a lower ring plate.

By the arrangement, the Z-shaped structure can enable the outer sealing layer to integrally cover the first sealing retainer ring, the second sealing retainer ring and the base, and further enhance the sealing effect of the device

Furthermore, one end and the lower surface of the upper ring plate are in contact with the second sealing retainer ring, and the inner side of the vertical ring plate is in contact with the first sealing retainer ring, the second sealing retainer ring and the outer side of the base.

So set up, the up end of upper ring plate with it is flat on first sealing ring corner upper end, just the perpendicular crown plate will first sealing ring, second sealing ring, the base encloses the inboard.

Furthermore, the number of the sealing assemblies is three, and the sealing assemblies are uniformly arranged between the first sealing retainer ring and the second sealing retainer ring.

So set up, it is three seal assembly can improve first sealing retainer ring the sealed effect in second sealing retainer ring clearance.

Compared with the prior art, the utility model has the advantages that:

a sealing assembly is arranged between the first sealing retainer ring and the second sealing retainer ring and comprises a protrusion arranged on the first sealing retainer ring and a groove arranged on the second sealing retainer ring. The bulge and the groove are arranged in a gap between the first sealing retainer ring and the second sealing retainer ring, and lubricating oil in the base can be prevented from leaking out of the gap by the bulge and the groove. And the sealing effect of the device can be further improved by utilizing the outer sealing layer.

Drawings

For ease of illustration, the invention is described in detail by the following detailed description and accompanying drawings.

FIG. 1 is a partial cross-sectional view of an oil seal of the present invention;

FIG. 2 is a sectional view of the second gasket of the present invention

Fig. 3 is a sectional view of a first gasket of the present invention;

FIG. 4 is a three-dimensional structure diagram of the injection molding machine of the present invention;

FIG. 5 is a cross-sectional view of the injection molding machine of the present invention;

FIG. 6 is a part view of the oil seal of the present invention;

FIG. 7 is a cross-sectional view of the oil seal of the present invention;

FIG. 8 is a partial cross-sectional view of a second oil seal according to an embodiment of the present invention;

fig. 9 is a partial enlarged view of a second embodiment of the present invention.

Description of reference numerals:

1. an injection molding machine; 2. plasticizing screw; 3. a lubricating oil sealing device; 4. an oil seal; 401. a base; 402. a first sealing retainer ring; 403. a second sealing retainer ring; 404. an outer sealing layer; 5. a seal assembly; 501. a protrusion; 502. a groove; 4041. an upper ring plate; 4042. a vertical ring plate; 4043. a lower ring plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Example one

Referring to fig. 1-7, the present invention provides an embodiment of a lubricating oil sealing device for injection molding machine, the specific structure of the embodiment is: the lubricating oil seal device 3 is arranged on the outer side of a plasticizing screw 2 in an injection molding machine 1, an oil seal member 4 is arranged in the lubricating oil seal device 3, the oil seal member 4 comprises a base 401, a first sealing retainer ring 402, a second sealing retainer ring 403 and an outer sealing layer 404, the base 401 is fixed on the injection molding machine 1, the first sealing retainer ring 402 is arranged on the base 401, the second sealing retainer ring 403 is arranged on the first sealing retainer ring 402, a seal assembly 5 is arranged between the first sealing retainer ring 402 and the second sealing retainer ring 403, and the seal assembly 5 comprises a bulge 501 arranged on the first sealing retainer ring 402 and a groove 502 arranged on the second sealing retainer ring 403.

The specific working process is as follows: the injection molding machine 1 starts to work, the plasticizing screw 2 carries out rotary propulsion, and in the working process of the plasticizing screw 2, lubricating oil in the lubricating oil sealing device 3 lubricates the plasticizing screw 2 to ensure the normal operation of the plasticizing screw 2; during the sealing process, the lubricant is firstly blocked by the first and second seal rings 402 and 403 in the oil seal 4, and if the lubricant leaks out from the gap between the first and second seal rings 402 and 403, the protrusion 501 and the groove 502 in the seal assembly 5 further seal, preventing the lubricant from leaking.

In this embodiment, the number of the seal assemblies 5 is three, and the seal assemblies are uniformly arranged between the first gasket 402 and the second gasket 403, and the shape of the protrusion 501 and the groove 502 is semicircular. Since it is necessary to improve the sealing performance of the apparatus, the greater the number of seal assemblies 5, the better; however, the more the number of seal assemblies 5, the less the accuracy of the fitting of the first gasket 402 to the second gasket 403, and the more the semicircular shape of the protrusion 501 and the semicircular shape of the groove 502 are to improve the accuracy of the fitting of the first gasket 402 to the second gasket 403.

In this embodiment, the corner of the first gasket 402 is a rounded corner, and the corner of the second gasket 403 is a right angle; the first sealing retainer ring 402 is tightly attached to the inner side of the base 401 and also tightly attached to the side surface of the base 401 close to the lubricating oil; the second gasket 403 abuts the first gasket 402. In the oil seal, the first and

second retainers

402 and 403 can seal the oil separately.

In this embodiment, the inner sides of the first and second gasket rings 402, 403 are flat with the outer sides. The first sealing retainer ring 402 and the second sealing retainer ring 403 are flattened at the side close to the lubricating oil, so that the lubricating oil can smoothly lubricate the plasticizing screw 2; the other side is to facilitate the installation of the outer sealing layer 404 and on the other hand to improve the sealing effect of the device.

In this embodiment, the outer sealing layer 404 is "Z" shaped as a whole, and the outer sealing layer 404 includes an upper ring plate 4041, a vertical ring plate 4042, and a lower ring plate 4043. One end and the lower surface of the upper ring plate 4041 contact the second gasket 403, and the inner side of the vertical ring plate 4042 contacts the outer sides of the first gasket 402, the second gasket 403, and the base 401.

In the process of lubricating oil sealing, the upper ring plate 4041 seals the first sealing retainer ring 402, the vertical ring plate 4042 seals the first sealing retainer ring 402, the second sealing retainer ring 403 and the base 401, and the lower ring plate 4043 is used for mounting the device.

Example two

Referring to fig. 8 and fig. 9, an embodiment of a lubricating oil sealing device for an injection molding machine according to the present invention is different from the above embodiment in that: the number of sealing assemblies 5 is one, and is arranged between the first gasket 402 and the second gasket 403, and the protrusions 501 and the grooves 502 are rectangular parallelepiped in shape. So set up, can save the processing cost.

The above description is only for the specific embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.

Claims

1. A lubricating oil seal device for an injection molding machine, the lubricating oil seal device (3) is arranged outside a plasticizing screw (2) in the injection molding machine (1) and used for lubricating the plasticizing screw (2), and is characterized in that: an oil seal piece (4) is arranged in the lubricating oil seal device (3), the oil seal piece (4) comprises a base (401), a first sealing retainer ring (402), a second sealing retainer ring (403) and an outer sealing layer (404), the first sealing retainer ring (402) is arranged on the base (401), the second sealing retainer ring (403) is arranged on the first sealing retainer ring (402), and the outer sealing layer (404) is arranged on one side of the first sealing retainer ring (402) and the second sealing retainer ring (403) and clings to the base (401);

wherein a seal assembly (5) is arranged between the first sealing gasket (402) and the second sealing gasket (403), the seal assembly (5) comprising a protrusion (501) arranged on the first sealing gasket (402) and a groove (502) arranged on the second sealing gasket (403).

2. The lubricating oil seal device for an injection molding machine according to claim 1, characterized in that: the shape of the protrusion (501) and the groove (502) is semicircular.

3. The lubricating oil seal device for an injection molding machine according to claim 2, characterized in that: the corner of the first sealing check ring (402) faces towards the center of a circle, and the corner of the second sealing check ring (403) faces towards the opposite direction.

4. The lubricating oil seal device for an injection molding machine according to claim 1, 2 or 3, characterized in that: the first sealing retainer ring (402) and the second sealing retainer ring (403) are at right angles.

5. The lubricating oil seal device for an injection molding machine according to claim 4, characterized in that: the inner sides of the first sealing retainer ring (402) and the second sealing retainer ring (403) are flat with the outer sides.

6. The lubricating oil seal device for an injection molding machine according to claim 1, 2 or 3, characterized in that: the outer sealing layer (404) is Z-shaped integrally, and the outer sealing layer (404) comprises an upper ring plate (4041), a vertical ring plate (4042) and a lower ring plate (4043).

7. The lubricating oil seal device for an injection molding machine according to claim 6, characterized in that: one end and the lower surface of the upper ring plate (4041) are in contact with the second sealing retainer ring (403), and the inner side of the vertical ring plate (4042) is in contact with the first sealing retainer ring (402), the second sealing retainer ring (403) and the outer side of the base (401).

8. The lubricating oil seal device for an injection molding machine according to claim 1, 2 or 3, characterized in that: the number of the sealing assemblies (5) is three, and the sealing assemblies are uniformly arranged between the first sealing retainer ring (402) and the second sealing retainer ring (403).