Concentric ring venting plug for low-pressure casting mold

Abstract

The utility model discloses a concentric ring venting plug for a low-pressure casting die, which is formed by sleeving an inner core and a plurality of outer rings with gradually increased diameters, a venting gap is arranged between the adjacent outer rings, and the outer rings comprise a first outer ring, a second outer ring, a third outer ring and a fourth outer ring from inside to outside in sequence; two outer exhaust grooves are symmetrically formed in the upper ends of the first outer ring, the second outer ring, the third outer ring and the fourth outer ring in the axial direction, exhaust ports are selectively formed in the bottoms of the outer exhaust grooves, and a circle of joint face exhaust grooves are formed in the lower ends of the first outer ring, the second outer ring, the third outer ring and the fourth outer ring in the circumferential direction. The exhaust plug can solve the problems that an existing exhaust plug is low in exhaust efficiency, complex in structure, prone to blockage and poor in product percent of pass due to uneven exhaust.

Description

TECHNICAL FIELD

[0001] The utility model relates to foundry mould technical field, concretely for a concentric ring exhaust plug for low pressure casting mould. BACKGROUND

[0002] In the foundry industry, low pressure casting is a commonly used casting method, which creates a low pressure environment in the mould, so that the metal liquid can fill the mould under smaller pressure, thereby producing high-quality castings. However, in this process, if the gas in the mould cannot be effectively discharged, it will cause the castings to have pores, shrinkage holes and other defects, affecting the quality and strength of the castings. The exhaust plug is an important part of low pressure casting, especially when producing castings with deep cavity structure, exhaust plug must be used to complete, the existing exhaust plug is not high in exhaust efficiency, the structure is complex, easy to block and uneven in exhaust, therefore, a concentric ring exhaust plug is designed to meet the current use requirement. SUMMARY

[0003] The utility model provides a concentric ring exhaust plug for low pressure casting mould can solve the problem that the existing exhaust plug is not high in exhaust efficiency, the structure is complex, easy to block and uneven in exhaust leads to the problem of poor product qualification rate.

[0004] To achieve the above object, the utility model provides the following technical scheme: a concentric ring exhaust plug for low pressure casting mould, including inner core and multiple diameter gradually increasing outer ring sleeve joint composition, adjacent outer ring is provided with exhaust gap, from inside to outside in turn for first outer ring, second outer ring, third outer ring and fourth outer ring, the upper end of first outer ring, second outer ring, third outer ring and fourth outer ring is provided with two outer exhaust grooves along its axial symmetry, and the outer exhaust groove is used for guiding gas to the outside of the mould, the bottom of outer exhaust groove is selectively provided with exhaust port, and the exhaust port is used for controlling the discharge of gas, the lower end of first outer ring, second outer ring, third outer ring and fourth outer ring is provided with a circle of joint surface exhaust groove along the circumferential direction, and the joint surface exhaust groove uniformly guides gas into the outer ring.

[0005] As preferred, the upper end surface of the first outer ring, the second outer ring, the third outer ring and the fourth outer ring is provided with an exhaust groove communicated with the outer exhaust groove, for enhancing the exhaust effect.

[0006] As preferred, the first outer ring, the second outer ring, the third outer ring and the fourth outer ring are provided with step mounting holes, for fixing and installing the outer ring.

[0007] As preferred, the upper end of the step mounting hole on the first outer ring is provided with a ventilation slot, which is simple in structure and facilitates gas discharge.

[0008] As preferred, the first gap between the first outer ring and the second outer ring is used for gas exhaust.

[0009] As preferred, the second gap between the second outer ring and the third outer ring is used for gas exhaust.

[0010] As preferred, the third gap between the third outer ring and the fourth outer ring is used for gas exhaust.

[0011] As preferred, the inner core is in the shape of stepped shaft, which is convenient for processing and installation.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The simple structure, through the multistage concentric ring design and the exhaust gap, can ensure that the gas can be smoothly exhausted, the multistage exhaust passage design is helpful to realize the uniform distribution of the pressure inside the mold, the exhaust passage is convenient for cleaning and maintenance, is simple to install, is convenient for quick installation and replacement, is suitable for various specifications of low-pressure casting molds, the diameter of each concentric ring can be adjusted through matching the exhaust rings of different diameters, and the cost is saved through recycling. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the utility model;

[0015] Figure 2 It is the front view structure diagram of the utility model;

[0016] Figure 3 It is the explosion drawing of the utility model;

[0017] Figure 4 It is the three-dimensional structure diagram of the first outer ring of the utility model;

[0018] Figure 5 It is the sectional structure diagram of the first outer ring of the utility model.

[0019] Reference signs:

[0020] 1, inner core, 2, first outer ring, 3, second outer ring, 4, third outer ring, 5, fourth outer ring, 6, outer exhaust groove, 7, exhaust port, 8, joint exhaust groove, 9, exhaust groove, 10, first gap, 11, second gap, 12, third gap, 13, stepped mounting hole, 14, venting slot. DETAILED DESCRIPTION

[0021] The technical scheme in the utility model embodiment will be described clearly and completely below with reference to the drawings in the utility model embodiment.

[0022] As Figures 1-5 shown, the utility model discloses to solve the problem of the poor product qualification rate caused by the low exhaust efficiency, the complex structure, the easy blockage and the uneven exhaust of the existing exhaust plug, and provides the following technical scheme: a concentric ring exhaust plug for low-pressure casting mold, which is composed of an inner core 1 and a plurality of outer ring sleeves with gradually increasing diameters, and exhaust gaps are arranged between adjacent outer rings, and the first outer ring 2, the second outer ring 3, the third outer ring 4 and the fourth outer ring 5 are sequentially arranged from inside to outside; the upper end of the first outer ring 2, the second outer ring 3, the third outer ring 4 and the fourth outer ring 5 is symmetrically provided with two outer exhaust grooves 6 along the axial direction, the outer exhaust grooves 6 are used for guiding the gas to the outside of the mold, the bottom of the outer exhaust groove 6 is selectively provided with an exhaust port 7, the exhaust port 7 is used for controlling the exhaust of the gas, and the lower end of the first outer ring 2, the second outer ring 3, the third outer ring 4 and the fourth outer ring 5 is provided with a circle of joint surface exhaust grooves 8 in the circumferential direction, and the joint surface exhaust grooves 8 uniformly guide the gas into the outer ring.

[0023] In the embodiment, as Figure 3 shown, the upper end face of the first outer ring 2, the second outer ring 3, the third outer ring 4 and the fourth outer ring 5 is provided with an exhaust groove 9 communicated with the outer exhaust groove 6, for enhancing the exhaust effect.

[0024] In the embodiment, as Figure 5 shown, the first outer ring 2, the second outer ring 3, the third outer ring 4 and the fourth outer ring 5 are provided with step mounting holes 13, for fixing and mounting the outer ring.

[0025] In the embodiment, as Figure 4 shown, the upper end of the step mounting hole 13 on the first outer ring 2 is provided with a ventilation slot 14, the ventilation slot 14 is communicated with the exhaust groove 9, and the structure is simple, facilitating the exhaust of the gas.

[0026] In the embodiment, as Figure 2 shown, the first outer ring 2 and the second outer ring 3 have a first gap 10, and the size of the first gap 10 is used for the exhaust of the gas.

[0027] In the embodiment, as Figure 2 shown, the second outer ring 3 and the third outer ring 4 have a second gap 11, for the exhaust of the gas.

[0028] In the embodiment, as Figure 2 shown, the third outer ring 4 and the fourth outer ring 5 have a third gap 12, for the exhaust of the gas.

[0029] In the embodiment, as Figure 3As shown, the inner core 1 is in the form of a stepped shaft, which is convenient to process and install.

[0030] In the present embodiment, as shown, Figure 2 The first outer ring 2 is sleeved on the inner core 1, the second outer ring 3 is sleeved on the first outer ring 2, the third outer ring 4 is sleeved on the second outer ring 3, and the fourth outer ring 5 is arranged on the third outer ring 4, and the upper end surface and the lower end surface are flush. The installed exhaust structure is installed in the mold, and during the operation of the mold, the gas in the mold enters the first gap 10, the second gap 11 and the third gap 12 through the plurality of joint surfaces 8, and the gas continues to pass through the exhaust port 7, the outer exhaust groove 6 and the exhaust groove 9, and is discharged from the mold, so that the pressure in the mold is uniform, and the quality of the casting is improved.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0033] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the present application.

Claims

1. A concentric ring vent plug for a low pressure casting mold, characterized by, The utility model relates to a kind of exhaust gas treatment device, including: Inner core (1) and multiple outer rings of gradually increasing diameter are connected, exhaust gap is arranged between adjacent outer rings, and it is first outer ring (2) from inside to outside, second outer ring (3), third outer ring (4) and fourth outer ring (5); The upper end of the first outer ring (2), the second outer ring (3), the third outer ring (4) and the fourth outer ring (5) is symmetrically provided with two outer exhaust grooves (6) along the axial direction, the bottom of the outer exhaust groove (6) is optionally provided with an exhaust port (7), and the lower end of the first outer ring (2), the second outer ring (3), the third outer ring (4) and the fourth outer ring (5) is provided with a circle of joint exhaust grooves (8) along the circumferential direction.

2. The concentric ring vent plug for a low pressure casting mold according to claim 1, characterized in that: The upper end surface of the first outer ring (2), the second outer ring (3), the third outer ring (4) and the fourth outer ring (5) is provided with an exhaust groove (9) communicated with the outer exhaust groove (6).

3. The concentric ring vent plug for a low pressure casting mold according to claim 1, characterized in that: The first outer ring (2), the second outer ring (3), the third outer ring (4) and the fourth outer ring (5) are provided with step mounting holes (13) in them.

4. The concentric ring vent plug for a low pressure casting mold according to claim 3, characterized in that: The upper end of the step mounting hole (13) on the first outer ring (2) is provided with a ventilation slot (14).

5. The concentric ring vent plug for a low pressure casting mold according to claim 1, characterized in that: The first outer ring (2) and the second outer ring (3) have a first gap (10) therebetween.

6. The concentric ring vent plug for a low pressure casting mold according to claim 1, characterized in that: The second outer ring (3) and the third outer ring (4) have a second gap (11) therebetween.

7. The concentric ring vent plug for a low pressure casting mold according to claim 1, characterized in that: The third outer ring (4) and the fourth outer ring (5) have a third gap (12) therebetween.

8. The concentric ring vent plug for a low pressure casting mold according to claim 1, characterized in that: The inner core (1) is in the form of a stepped shaft.

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