CN220901816U - Needle type exhaust structure - Google Patents

Abstract

The utility model discloses a needle type exhaust structure which comprises a wax pattern, wherein a deep cavity is formed in the wax pattern, a core bar is connected to the inner wall of the deep cavity in a matched mode, a first limiting edge is arranged on the outer wall of the core bar, the first limiting edge is connected with the wax pattern in a matched mode, a first air passage is formed in the core bar, an exhaust needle is connected to the inner wall of the first air passage in a matched mode, a conical air passage is formed in the bottom of the first air passage, a conical head is arranged at the bottom of the exhaust needle, the conical head is connected with the conical air passage in a matched mode, and a clamping head is fixedly connected to the top of the exhaust needle. The utility model relates to the technical field of casting molds, and solves the problems that in the prior art, because the loose core and a wax pattern are tightly attached, air cannot reach the interior of a wax pattern deep cavity through a contact surface, and vacuum is formed between the loose core and the wax pattern deep cavity to cause a negative pressure state, so that the loose core is laborious to withdraw, and the integrity of the wax pattern is possibly damaged even due to the negative pressure state in the deep cavity.

Description

Needle type exhaust structure

Technical Field

The utility model relates to the technical field of casting molds, in particular to a needle type exhaust structure.

Background

The casting mold is to make the structural shape of the part by using other materials easy to mold in advance, then put the mold into the sand mold, so that a cavity with the same structural size as the part is formed in the sand mold, pour the fluidity liquid into the cavity, the liquid can form the part with the same shape and structure as the mold after cooling and solidification, and for some castings with deep cavity structural characteristics, the wax mold needs to be made into a deep cavity structure by using a loose core mode when the wax mold is made.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a needle-type exhaust structure, which solves the problems that in the prior art, because the core pulling and the wax pattern are tightly attached, air cannot reach the interior of the wax pattern deep cavity through a contact surface, and a vacuum is formed between the core pulling and the wax pattern deep cavity to cause a negative pressure state, so that the core pulling is laborious when being pulled out, and the integrity of the wax pattern is possibly damaged even due to the negative pressure state in the deep cavity.

In order to achieve the above purpose, the present utility model is realized by the following technical scheme: the utility model provides a pin-type exhaust structure, includes the wax matrix, the inside of wax matrix is provided with dark chamber, the inner wall cooperation in dark chamber is connected with the core bar, the outer wall of core bar is provided with first spacing edge, first spacing edge is connected with the cooperation of wax matrix, first air flue has been seted up to the inside of core bar, the inner wall cooperation of first air flue is connected with the gas vent needle, the bottom of first air flue is provided with the toper air flue, the bottom of gas vent needle is provided with the conical head, conical head and toper air flue cooperation are connected, the top fixedly connected with dop of gas vent needle, the dop is connected with the core bar cooperation.

Preferably, the outer wall of the core rod is provided with a second limiting edge above the first limiting edge, and the top of the outer wall of the core rod is provided with a third limiting edge.

Preferably, limit clamps are arranged on two sides of the top of the core bar, limit grooves are formed on two sides of the bottom of the outer wall of the clamping head, the limit clamps are connected with the limit grooves in a matched mode, and a cross rod is fixedly connected to one side of the outer wall of the clamping head.

Preferably, the exhaust needle and the inside of the clamping head are both provided with a second air passage, one side of the conical head is provided with an exhaust hole, and the exhaust hole is communicated with the second air passage.

Preferably, grooves are formed in the outer wall of the core rod above the second limiting edge at equal intervals.

The utility model provides a needle type exhaust structure. The beneficial effects are as follows: this needle exhaust structure, through the cooperation between core bar, first air flue, exhaust needle, dop, toper air flue and the conical head, after the shaping of accomplishing the wax pattern, through taking out the exhaust needle in by the core bar, make the vacuum face between core bar and the wax pattern eliminate, outside air can get into the inside in dark chamber through first air flue, can be convenient for carry out the operation of loosing core of wax pattern like this, can avoid simultaneously the interior of dark chamber of wax pattern to cause the destruction because of negative pressure state to the integrality of wax pattern, help the enterprise to improve the production qualification rate of wax pattern.

Through the cooperation between core bar, first air flue, exhaust needle, dop, conical head, second air flue and the exhaust hole, when carrying out the plug to the exhaust needle, make the air in the first air flue circulate with the external world through second air flue and exhaust hole, when not influencing the exhaust to the sealed effect of first air flue, can improve the plug efficiency of exhaust needle, the staff of being convenient for carries out the plug operation of exhaust needle like this.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the present utility model;

FIG. 3 is a schematic view of the chuck, limiting slot and vent pin of FIG. 1;

FIG. 4 is a cross-sectional view of the core pin, stop clip and first air passage of FIG. 1;

fig. 5 is a schematic view of the appearance of the wax pattern and deep cavity of fig. 1.

In the figure: 1. wax pattern, 2, deep cavity, 3, core bar, 4, first air flue, 5, exhaust needle, 6, chuck, 7, first spacing edge, 8, second spacing edge, 9, third spacing edge, 10, toper air flue, 11, conical head, 12, spacing groove, 13, spacing card, 14, horizontal pole, 15, second air flue, 16, exhaust hole, 17, recess.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the prior art, because the fit between the core pulling and the wax pattern is tight, air cannot reach the inside of the wax pattern deep cavity through the contact surface, and vacuum is formed between the core pulling and the wax pattern deep cavity to cause a negative pressure state, so that the core pulling is laborious when being pulled out, and the integrity of the wax pattern can be damaged even due to the negative pressure state in the deep cavity.

In view of this, the utility model provides a needle type exhaust structure, through the cooperation between core bar, first air flue, exhaust needle, chuck, toper air flue and conical head, after accomplishing the shaping of wax pattern, through taking the exhaust needle out in the core bar, make the vacuum face between core bar and the wax pattern eliminate, the air can get into the inside of deep cavity through first air flue, be convenient for carry out the operation of loosing core of wax pattern, avoid the deep cavity of wax pattern to cause the destruction to the integrality of wax pattern because of the negative pressure state, improve the production qualification rate of wax pattern.

All electric parts and the adaptive power supply are connected through wires by the person skilled in the art, and a proper controller and encoder should be selected according to actual conditions so as to meet control requirements, specific connection and control sequence, and the electric connection is completed by referring to the following working principles in the working sequence among the electric parts, and the detailed connection means are known in the art, and mainly introduce the working principles and processes as follows, and do not describe the electric control.

As can be seen from fig. 1 to 5, a needle type exhaust structure comprises a wax pattern 1, wherein the wax pattern 1 is a fusible model of a cast part, a deep cavity 2 is arranged in the wax pattern 1, the deep cavity 2 is a deep cavity structure of the cast part, the inner wall of the deep cavity 2 is connected with a core rod 3 in a matched manner, the outer wall of the core rod 3 is provided with a first limiting edge 7, the first limiting edge 7 is connected with the wax pattern 1 in a matched manner, a first air channel 4 is arranged in the core rod 3, the first air channel 4 penetrates through the core rod 3, an exhaust needle 5 is connected with the inner wall of the first air channel 4 in a matched manner, a conical air channel 10 is arranged at the bottom of the first air channel 4, a conical head 11 is arranged at the bottom of the exhaust needle 5, the conical head 11 is used for reducing the contact area between the exhaust needle 5 and the wax pattern 1, larger trace remained on the surface of the wax pattern 1 is avoided, the conical head 11 is connected with the conical air channel 10 in a matched manner, the top of the exhaust needle 5 is fixedly connected with a chuck 6, and the chuck 6 is connected with the core rod 3 in a matched manner;

In the specific implementation process, it is worth particularly pointing out that the wax pattern 1 is a meltable model of a cast part, the deep cavity 2 is a deep cavity structure of the cast part, the deep cavity structure is formed in the wax pattern 1 through the cooperation between the wax pattern 1, the core rod 3 and the first limiting edge 7, the first air channel 4 penetrates through the core rod 3 and is used for eliminating vacuum and negative pressure generated in the core pulling process when the core rod 3 is separated from the wax pattern 1, the core rod 3 is more easily pulled out from the wax pattern 1, the cone 11 is used for reducing the contact area between the air exhaust needle 5 and the wax pattern 1, larger marks left on the surface of the wax pattern 1 are avoided, meanwhile, the negative pressure acting force generated when the air exhaust needle 5 is pulled out is reduced, the first air channel 4 is closed through the cooperation between the cone-shaped air channel 10 and the cone 11, the marks left on the surface of the wax pattern 1 are reduced, meanwhile, the air exhaust needle 5 is conveniently pulled out, the core rod 3, the first air channel 4, the air exhaust needle 5, the chuck 6, the cone-shaped air channel 10 and the cone 11 are matched, after the forming of the wax pattern 1 is completed, the air exhaust needle 3 is more easily pulled out from the core rod 3, the vacuum is conveniently produced, the vacuum condition of the deep cavity 1 is avoided, the vacuum condition is completely is avoided, the vacuum condition of the core rod 1 is completely is improved, and the vacuum condition is completely is avoided, the vacuum condition is 2 is improved, and the vacuum condition is caused by the vacuum condition is 2, and the vacuum condition is completely is improved, by the vacuum cavity 1 by the core cavity by the core rod 1, by the vacuum condition is 2, and the vacuum condition is 2;

Further, a second limiting edge 8 is arranged above the first limiting edge 7 on the outer wall of the core rod 3, a third limiting edge 9 is arranged at the top of the outer wall of the core rod 3, and the second limiting edge 8 and the third limiting edge 9 are used for limiting and fixing between the core rod 3 and the die;

in the specific implementation process, it is worth particularly pointing out that the second limit edge 8 and the third limit edge 9 are used for limiting and fixing between the core rod 3 and the die, so that the stability of the core rod 3 in the manufacturing process of the wax pattern 1 is improved;

Furthermore, both sides of the top of the core bar 3 are provided with limiting clamps 13, both sides of the bottom of the outer wall of the clamping head 6 are provided with limiting grooves 12, the limiting clamps 13 are connected with the limiting grooves 12 in a matched manner, one side of the outer wall of the clamping head 6 is fixedly connected with a cross rod 14, and the cross rod 14 is used for providing an application point when the clamping head 6 is rotated and the exhaust needle 5 is inserted and pulled out;

In the specific implementation process, it is worth particularly pointing out that through the cooperation among the core rod 3, the clamping head 6, the limiting groove 12 and the limiting clamp 13, after the exhaust needle 5 is inserted into the first air channel 4, the clamping head 6 is rotated, the limiting groove 12 and the limiting clamp 13 form limiting, the fixing of the exhaust needle 5 is realized, the connection stability between the core rod 3 and the exhaust needle 5 is ensured, the tail end of the exhaust needle 5 is prevented from moving after being stressed in the manufacturing process of the wax pattern 1, the sealing effect of the exhaust needle 5 on the first air channel 4 is ensured, and the transverse rod 14 is used for providing an impetus when the clamping head 6 is rotated and the exhaust needle 5 is inserted and pulled out;

further, the exhaust needle 5 and the inside of the clamping head 6 are respectively provided with a second air passage 15, one side of the conical head 11 is provided with an exhaust hole 16, and the exhaust hole 16 is communicated with the second air passage 15;

In the specific implementation process, it is worth particularly pointing out that through the cooperation among the core rod 3, the first air passage 4, the exhaust needle 5, the clamping head 6, the conical head 11, the second air passage 15 and the exhaust hole 16, when the exhaust needle 5 is plugged and unplugged, the air in the first air passage 4 can circulate with the outside through the second air passage 15 and the exhaust hole 16, and the plugging and unplugging efficiency of the exhaust needle 5 is improved while the sealing effect of the exhaust needle 5 on the first air passage 4 is not influenced;

Further, grooves 17 are formed in the outer wall of the core bar 3 above the second limiting edge 8 at equal intervals;

In the specific implementation process, it is worth particularly pointing out that the groove 17 is used for providing an acting point for a worker when the wax pattern 1 performs rotary core pulling operation, so that the core bar 3 can be conveniently rotated, and the core pulling efficiency of the wax pattern 1 is improved;

specifically, when the needle type exhaust structure is used, the core rod 3 is placed into a wax-type forming die, the core rod 3 and the die are fixed through the second limiting edge 8 and the third limiting edge 9, the die is combined and fixed, a wax-type inner cavity with a deep cavity structure is formed in the die, the exhaust needle 5 is inserted into the first air passage 4 of the core rod 3, in the process of inserting the exhaust needle 5, air in the first air passage 4 is exhausted through the exhaust hole 16 and the second air passage 15, after the conical air passage 10 is sealed by the cone head 11, the exhaust needle 5 and the chuck 6 are rotated through the cross rod 14, the limiting clamp 13 of the core rod 3 forms a limit on the limiting groove 12 of the chuck 6, the core rod 3 and the exhaust needle 5 are fixed, a fusible material is injected into the wax-type inner cavity of the forming die, the die is opened after the wax-type 1 is formed, the die 1 and the core rod 3 are taken out from the die, the air discharging needle 5 and the clamping head 6 are rotated through the cross rod 14, the limit between the limit groove 12 and the limit clamp 13 is released, the air discharging needle 5 is pulled upwards, in the process of pulling the air discharging needle 5, external air enters the first air passage 4 through the second air passage 15 and the air discharging hole 16, so that the air pressure in the first air passage 4 is balanced with the external air pressure, after the air discharging needle 5 is separated from the first air passage 4, the first air passage 4 is in an open state, the core rod 3 is rotated, the core pulling operation is carried out simultaneously, in the core pulling process, the external air enters the deep cavity 2 of the wax pattern 1 through the first air passage 4 and the conical air passage 10, the negative pressure state is avoided to form in the deep cavity 2 in the core pulling process, after the core rod 3 is separated from the wax pattern 1, the core pulling operation of the wax pattern 1 is completed, and the core pulling operation is carried out through the cooperation among the core rod 3, the first air passage 4, the air discharging needle 5, the clamping head 6, the conical air passage 10 and the conical head 11, after the forming of the wax pattern 1 is finished, the exhaust needle 5 is pulled out from the core rod 3, so that a vacuum surface between the core rod 3 and the wax pattern 1 is eliminated, air can enter the deep cavity 2 through the first air passage 4, core pulling operation of the wax pattern 1 is facilitated, damage to the integrity of the wax pattern 1 due to a negative pressure state in the deep cavity 2 of the wax pattern 1 is avoided, and the production qualification rate of the wax pattern 1 is improved.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The term "comprising" an element defined by the term "comprising" does not exclude the presence of other identical elements in a process, method, article or apparatus that comprises the element.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A needle type exhaust structure comprising a wax pattern (1), characterized in that: the inside of wax matrix (1) is provided with dark chamber (2), the inner wall cooperation in dark chamber (2) is connected with core bar (3), the outer wall of core bar (3) is provided with first spacing edge (7), first spacing edge (7) are connected with wax matrix (1) cooperation, first air flue (4) have been seted up to the inside of core bar (3), the inner wall cooperation of first air flue (4) is connected with exhaust needle (5), the bottom of first air flue (4) is provided with toper air flue (10), the bottom of exhaust needle (5) is provided with conical head (11), conical head (11) are connected with toper air flue (10) cooperation, the top fixedly connected with dop (6) of exhaust needle (5), dop (6) are connected with core bar (3) cooperation.

2. A needle type exhaust structure according to claim 1, wherein: the outer wall of the core bar (3) is provided with a second limiting edge (8) above the first limiting edge (7), and the top of the outer wall of the core bar (3) is provided with a third limiting edge (9).

3. A needle type exhaust structure according to claim 1, wherein: limiting clamps (13) are arranged on two sides of the top of the core bar (3), limiting grooves (12) are formed in two sides of the bottom of the outer wall of the clamping head (6), the limiting clamps (13) are connected with the limiting grooves (12) in a matched mode, and a cross rod (14) is fixedly connected to one side of the outer wall of the clamping head (6).

4. A needle type exhaust structure according to claim 1, wherein: the exhaust needle (5) and the inside of the clamping head (6) are both provided with a second air passage (15), one side of the conical head (11) is provided with an exhaust hole (16), and the exhaust hole (16) is communicated with the second air passage (15).

5. A needle type exhaust structure according to claim 2, characterized in that: the outer wall of the core bar (3) is positioned above the second limiting edge (8) and is provided with grooves (17) at equal intervals.