KR102546413B1 - A mold for an insulator bracket with knurling structure at a fastening surface - Google Patents

Abstract

The present invention relates to a mold for an insulator bracket having a knurling structure at a fastening surface. With the mold of the present invention, a suspension insulator bracket with a knurling shape is formed so that when the suspension insulator bracket is fastened to a vehicle body using the knurling shape, the part of the knurling shape, which is formed as a sharp pitch, comes into contact with a washer, causing plastic deformation, and the contact area expands due to the plastic deformation. Therefore, the suspension insulator bracket has superior fastening force compared to the fastening force of previously used insulator parts, so that the high fastening force can prevent product detachment due to impact, and provides a comfortable ride for consumers by suppressing noise and vibration.

Description

A mold for an insulator bracket with knurling structure at a fastening surface}

The present invention forms a suspension insulator bracket having a knurled shape, and when the car body is fastened using the knurled shape, plastic deformation occurs as the sharp pitched part of the knurled shape contacts the washer, and the plastic deformation causes the contact area to widen. Suspension insulator that has superior clamping force compared to the clamping force of previously used insulator parts, which prevents the product from detaching due to impact due to the high clamping force, and provides convenient riding comfort to consumers by suppressing noise and vibration. It relates to an insulator bracket mold with a fastening surface knurling structure forming a bracket.

In general, the suspension system of a vehicle connects an axle and a body to control vibration or shock received from the road surface during driving so that it is not directly transmitted to the body, preventing damage to the body and cargo, and improving ride comfort and stability. As a device, It consists of a chassis spring that alleviates shock from the road surface, a shock absorber that improves riding comfort by controlling the free vibration of the chassis spring, and a stabilizer that prevents rolling of the vehicle. It plays a role in improving the riding comfort and stability of the vehicle while performing the three main functions of constant, damping force and height control.

In addition, the suspension system is configured to adjust the height or the damping force according to driving conditions such as the condition of the road surface and the current speed of the vehicle, and accordingly, the ride comfort and steering stability of the vehicle can be maintained in an optimal state. making it possible

Various types of suspension devices are used according to their characteristics. Among them, the strut type suspension device is the upper part of the shock absorber coupled to the vehicle body. An insulator assembly is installed to support the strut to the vehicle body to improve steering stability.

1 is an exploded perspective view showing a state before assembling a strut insulator assembly of a vehicle suspension device according to a conventional embodiment, and FIG. 2 is a perspective view showing an installed state of a strut insulator assembly of a vehicle suspension device according to a conventional embodiment. FIG. 3 is a schematic diagram showing that the actual contact area between the washer under the bolt head of the bolt fastened to the insulator bracket of the vehicle suspension system according to the conventional general structure and the insulator bracket is not constant. As shown in FIGS. 1 and 2 (refer to Korean Registered Patent No. 10-1528783 (June 9, 2015)), the piston rod 410 of the shock absorber is the strut insulator assembly (A) of the vehicle suspension (insulator bracket Also referred to as), and the strut insulator assembly (A) of the vehicle suspension system is fixedly mounted to the vehicle body (P).

As described in claim 1, the strut insulator assembly of the vehicle suspension of the conventional Korean Patent Registration No. 10-1528783 is "installed on the vehicle body (P) and vibrates to the upper end of the shock absorber (400)" In the strut insulator assembly of a vehicle suspension system installed at the upper end of the piston rod 410 of the shock absorber 400 to prevent it from being transmitted to the vehicle body, the upper bracket fixed to the vehicle body P -bracket (100); An inner pipe (210) located in the center of the coupling groove (111) of the body (110) of the upper bracket (100) and fixed to the upper end of the piston rod (410) The core member 220 in which the inner pipe 210 is insert-molded, and the outer pipe 230 press-fitted into the coupling groove 111 of the main body 110 of the upper bracket 100, and A pipe assembly 200 made of anti-vibration rubber 240 interposed by molding between the core member 220 and the outer pipe 230; And seated on the upper surface of the pipe assembly 200, the upper bracket 100 A strut insulator assembly of a vehicle suspension system including an upper cap (300) to which the entire circumference of the upper end of the body (110) is curled and fixed. As described, “vibration or shock transmitted to the vehicle body via the struts through the wheels due to the vehicle running on an uneven road surface is inserted into the anti-vibration rubber molded between the outer pipe and the core member in which the inner pipe is insert-molded in the middle. By being properly absorbed by the anti-vibration rubber and then transmitted to the vehicle body, there is no need to set the initial pressing amount on the anti-vibration rubber, increasing the degree of freedom in shape design, and enabling the use of rubber materials of low hardness to satisfy the durability of the anti-vibration rubber, thereby enabling the vehicle body It is possible to reduce the vibration or shock transmission rate of the vehicle, effectively improving the cornering and riding comfort of the vehicle.

However, as shown in FIG. 3, the strut insulator assembly of the vehicle suspension of the conventional Korean Patent Registration No. 10-1528783, that is, the insulator bracket, due to the non-uniform flatness of the insulator bracket, the bolts fastened to the insulator bracket and the vehicle body Since the contact between the bolt head and the washer under the bolt head is not made over the entire area, but only in a small portion, a reduction in the fastening force between the washer and the insulator bracket due to the reduction in the contact area is induced, thereby reducing the speed bump while the vehicle is running. or when driving at high speed, the car body is subjected to frequent up and down impacts due to the nose-down phenomenon (the car body is lowered by inertia), and as these symptoms are repeated, the gap between the insulator bracket and the bumper stopper of the suspension system located below it increases. There is a problem in that a phenomenon in which a gap or shock is induced is induced. In the case of vehicles that have been recalled so far due to problems with the suspension system, most of these defects have occurred, threatening customer inconvenience and safety, and automakers are striving for continuous development to solve this problem.

Therefore, compared to the insulator bracket of the conventional vehicle suspension system, there is a growing need for an insulator bracket structure that can withstand repeated impacts with high fastening force of the insulator bracket to the washer under the bolt head of the bolt fastened to the vehicle body. are doing

Republic of Korea Patent No. 10-1528783 (2015.06.09.)

The fastening surface knurled structure insulator bracket mold according to the present invention is intended to solve the following problems.

An object of the present invention is to adopt a knurled structure in the contact area of the insulator bracket for the washer disposed under the bolt head of the bolt fastened to the insulator bracket, thereby providing a washer and It is to provide an insulator bracket mold having a knurled structure on a fastening surface capable of withstanding repeated impacts with high fastening force between the insulator brackets.

Another object of the present invention is to produce an insulator bracket having a knurled structure by periodically replacing the change core by employing a change core structure in a slide core during mold manufacturing, thereby producing a mold corresponding to the knurled structure of the casting during casting of the insulator bracket. To provide a fastening surface knurling structure insulator bracket mold that prevents the occurrence of a non-formed phenomenon in which the knurling shape is not properly formed in the insulator bracket product.

Another object of the present invention is to provide a thermal insulation circulation cooling device to completely remove the cooling water from the cooling water line 31 before filling the mold when filling the casting, so that the mold is hardened before complete filling of the casting due to the temperature cooling of the mold when the cooling water remains. An object of the present invention is to provide an insulator bracket mold having a fastening surface knurled structure that realizes complete molding by preventing incomplete molding caused by development and at the same time improves the moldability of the insulator bracket product by rapid cooling during cooling after complete molding.

A further object of the present invention is to provide an air hole foreign matter removal device, so that foreign matter or fine adherent material stuck between the grooves of the micropattern of the mold corresponding to the knurled structure of the insulator bracket is removed with high-pressure compressed air for every shot. An object of the present invention is to provide an insulator bracket mold with a knurled structure of a fastening surface that realizes complete molding according to the machining dimensions of the mold by performing air cleaning.

An apparatus for forming a knurled structure of a suspension insulator bracket according to the present invention is configured as follows in order to solve the above problems.

It includes a lower mold 11 and an upper mold 12 that is separated and coupled to the upper part of the lower mold 11, and is connected to the runner through which the casting is injected and flows, and the vehicle suspension device to be cast. A mold 10 in which a cavity having a shape corresponding to the shape of the insulator bracket IB is formed; a main core 21 disposed in contact with each other between the lower mold 11 and the upper mold 12 coupled thereto And a slide core 22, wherein the slide core 22 includes a knurled pattern portion 22-3b processed to have a pattern of a plurality of knurled concave grooves 22-3a along an annular shape. A core 20 including a pair of knurled cores 22-3 formed in contact with the cavity; and a first signal or casting according to a first cycle time corresponding to a set time before the start of filling the casting in the cavity A controller (C) configured to transmit a second signal according to a second cycle time required for filling the casting in the cavity for conditionally complete molding; and the lower mold 11 and the slide core starting from the outside of the lower mold 11 The coolant inside 22 is installed in a coolant line 31 disposed around the cavity to cool the casting injected into the cavity, and a coolant line 31 outside the lower mold 11 to cool the casting. Connected to the pump 32 receiving the first signal or the second signal and performing the first operation according to the first signal or the second operation according to the second signal, and the cooling water line 31 outside the lower mold 11 The warming circulation cooling device 30 composed of a cooling water supply source 33 that supplies cooling water to the cooling water line 31 or collects and stores cooling water from the cooling water line 31; and is connected to the controller C to receive the first signal. A compressor 41 in which the third operation according to is performed, and the high-pressure compressed air connected to the compressor 41 and supplied from the compressor 41 according to the third operation is directed toward the knurled pattern portion 22-3b An air hole foreign matter removal device 40 composed of an air line 42 disposed in the lower mold 11 to remove foreign matter between the plurality of knurled concave grooves 22-3a by spraying, Each of the pair of knurled cores 22-3 is formed with a hollow inside, and the inside of the hollow is divided into left and right separated left and right spaces 22L and 22R so that cooling water can flow in and out, but downstream It is characterized in that it includes a separating plate 22-3c forming a space formed by a concave portion 22-3c1 that communicates the left and right spaces separated at the side end.

The slide core 22 is integrally configured, and the slide core 22 has a plurality of knurled concave grooves 22-3a along an annular shape. A knurled pattern portion 22-3b processed to have a pattern. It is characterized in that it comprises a pair of knurled cores 22-3 forming over the entire length in a state in contact with the cavity.

The slide core 22 includes a slide core body 22-1 and a change core 22-2 detachably coupled to the slide core body 22-1, and the change core 22-2 A pair of knurled cores 22- forming a knurled pattern portion 22-3b processed to have a pattern of a plurality of knurled concave grooves 22-3a along an annular shape in contact with the cavity 3), and a pair of knurled cores 22-3 are detachably or separably inserted into and coupled to the change core 22-2.

The first cooling water line 31 is connected to the cooling water line 31 on the left side of the lower mold 11 and disposed inside the slide core 22 toward a direction remote from the cooling water supply source 33. A cooling water line 31-1 and a second cooling water line extending vertically upward from the downstream end of the first horizontal line 31-1 inside the slide core 22 and then horizontally extending to the right. 31-2, a first inlet line extending horizontally from the upper end of the second cooling water line 31-2 toward a direction remote from the cooling water supply source 33, and the inside of the slide core 22 of the communication space formed by the left space of the left knurled core 22-3 extending in a straight line from the first inlet line and the concave portion 22-3c1 and the left knurled core 22-3 A third coolant line composed of a right side space and a first outlet line extending in a straight line from the right side space of the left knurled core 22-3 by the length of the first inlet line and forming a 'U' shape ( 31-3), a fourth coolant line 31-4 horizontally extending from the downstream end of the first outlet line to form an angle of 90° to the right side with the first inlet line, and 4 A second inlet line extending in parallel in the same direction as the first inlet line from the downstream end of the cooling water line 31-4, and a right knurled core 22-3 extending in a straight line from the second inlet line The communication space formed by the space on the left side and the concave portion 22-3c1 of the right side of the knurled core 22 by the length of the space on the right side of the knurled core 22-3 on the right side and the second inlet line. The fifth cooling water line 31-5, which is composed of a second outflow line extending horizontally to the right after extending in a straight line from the space on the right side of -3) and forming a 'U' shape, and the second inlet line A sixth cooling water line 31-6 extending vertically downward from the downstream end of the second outflow line by the length of the second cooling water line 31-2 so as to form an angle of 90° to the vertical; The cooling water supply source ( 33) is characterized in that it includes a seventh cooling water line 31-7 disposed in a direction proximate to 33).

The controller C controls the cooling water to be rapidly removed from the cooling water line 31 during the first operation of the pump 32 and rapidly supplied from the cooling water line 31 during the second operation of the pump 32. It is characterized in that the first signal and the second signal are constituted.

Each of the plurality of knurled concave grooves 22-3a has a cross section in the shape of an inverted isosceles triangle.

The main core 21 includes a lower main core 21a disposed in the lower mold 11 and an upper main core 21b disposed in the upper mold 12 and detachably coupled to the lower main core 21a. Consisting of, the removal of foreign substances between the knurled concave grooves 22-3a by high-pressure compressed air separates the upper mold 12 from the lower mold 11 and the upper main core from the lower main core 21a ( 21b) is characterized in that it is performed before each shot in the separated mold opening state.

The present invention can exert the following effects by the above solution.

First, by adopting a knurled structure at the contact area of the insulator bracket for the washer disposed under the bolt head of the bolt fastened to the insulator bracket, the gap between the washer under the bolt head and the insulator bracket is improved compared to the insulator bracket of the conventional vehicle suspension. There is an effect of providing an insulator bracket mold with a knurling structure on the fastening surface that can withstand repeated impact with high clamping force.

Another object of the present invention is to produce an insulator bracket having a knurled structure by periodically replacing the change core by employing a change core structure in a slide core during mold manufacturing, thereby producing a mold corresponding to the knurled structure of the casting during casting of the insulator bracket. There is an effect of providing an insulator bracket mold with a knurled structure on the fastening surface that prevents the seizure phenomenon to the micropattern of the insulator bracket and thus prevents the occurrence of a non-formed phenomenon in which the knurling shape is not properly formed in the insulator bracket product.

Another object of the present invention is to provide a thermal insulation circulation cooling device to completely remove the cooling water from the cooling water line 31 before filling the mold when filling the casting, so that the mold is hardened before complete filling of the casting due to the temperature cooling of the mold when the cooling water remains. There is an effect of providing a fastening surface knurled structure insulator bracket mold that realizes complete molding by preventing incomplete molding caused by development and at the same time improves the formability of the insulator bracket product by rapid cooling during cooling after complete molding.

A further object of the present invention is to provide an air hole foreign matter removal device, so that foreign matter or fine adherent material stuck between the grooves of the micropattern of the mold corresponding to the knurled structure of the insulator bracket is removed with high-pressure compressed air for every shot. There is an effect of providing an insulator bracket mold with a knurled structure on the fastening surface that implements complete molding according to the machining dimensions of the mold by performing air cleaning.

1 is an exploded perspective view showing a state before assembling a strut insulator assembly of a vehicle suspension system according to a conventional embodiment.
2 is a schematic view showing an installation state of a strut insulator assembly of a vehicle suspension device according to a conventional embodiment.
FIG. 3 is a schematic diagram showing that the actual contact area between a washer under a bolt head of a bolt fastened to an insulator bracket of a vehicle suspension device according to a conventional general structure and an insulator bracket is not constant.
4 is a perspective view of a fastening surface knurled structure insulator bracket mold according to an embodiment of the present invention.
FIG. 5 is a perspective view of a slide core having a cooling water line according to an embodiment among components of the insulator bracket mold having a fastening surface knurling structure shown in FIG. 4 .
FIG. 6 is an enlarged view of portion A of FIG. 5 .
FIG. 7 is a perspective view of a slide core having a coolant line according to an embodiment different from that of FIG. 5 .
FIG. 8 is a perspective view illustrating states of casting, opening of the mold, and removal of foreign substances, respectively, as states of disposition of a slide core and a main core in a mold for removing foreign substances in an air hole.
9 is an enlarged view of an air hole foreign matter removal device and its surroundings.
10 is a schematic diagram showing that the actual contact area between the washer under the bolt head of the bolt fastened to the insulator bracket of the vehicle suspension system according to the general structure of the present invention and the insulator bracket is always constant.
11 is a block diagram schematically showing a connection relationship between a controller and a warming circulation cooling device and a connection relationship between a controller and an air hole foreign matter removal device among components of the fastening surface knurled structure insulator bracket mold of FIG. 4 .

Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that this is not intended to limit the technology described herein to specific embodiments, and includes various modifications, equivalents, and/or alternatives of the embodiments of the present invention. In connection with the description of the drawings, like reference numerals may be used for like elements.

In addition, expressions such as “first,” “second,” and the like used in the present invention may modify various components regardless of order and/or importance, and to distinguish one component from another. It is used only and does not limit the corresponding components. For example, 'first part' and 'second part' may indicate different parts regardless of order or importance. For example, without departing from the scope of rights described in the present invention, a first element may be called a second element, and similarly, the second element may also be renamed to the first element.

In addition, the terms used in the present invention are only used to describe a specific embodiment, and may not be intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by a person of ordinary skill in the art described in the present invention. Among the terms used in the present invention, terms defined in a general dictionary may be interpreted as having the same or similar meaning as the meaning in the context of the related art, and unless explicitly defined in the present invention, an ideal or excessively formal meaning not be interpreted as In some cases, even terms defined in the present invention cannot be interpreted to exclude embodiments of the present invention.

Hereinafter, looking at an embodiment of the present invention for solving the above problems together with the accompanying drawings.

4 is a perspective view of a fastening surface knurled structure insulator bracket mold according to an embodiment of the present invention, and FIG. 5 is a slide core having a cooling water line according to one embodiment of the components of the fastening surface knurled structure insulator bracket mold of FIG. 6 is an enlarged view of part A of FIG. 5, FIG. 7 is a perspective view of a slide core having a cooling water line according to an embodiment different from that of FIG. 5, and FIG. It is a perspective view showing the state of disposition of the core in the mold at the time of casting, mold opening, and removal of foreign substances, respectively. FIG. 9 is an enlarged view of the air hole foreign matter removal device and its surroundings, and FIG. It is a schematic diagram showing that the actual contact area between the washer under the bolt head of the bolt fastened to the insulator bracket of the vehicle suspension and the insulator bracket is always constant, and FIG. It is a block diagram schematically showing the connection relationship between the controller and the warming circulation cooling device and the connection relationship between the controller and the air hole foreign matter removal device.

4 to 6, the fastening surface knurled structure insulator bracket mold according to an embodiment of the present invention includes a mold 10, a core 20, a controller C, and an air hole foreign matter removal device 40 includes

<Mold (10)>

The mold 10 includes a lower mold 11 and an upper mold 12 that is separated and coupled to the upper part of the lower mold 11, and a runner (not shown) through which casting is injected and flows, and the runner A cavity (not shown) having a shape corresponding to the shape of an insulator bracket (IB) of an automobile suspension device to be cast is formed. According to this, when the casting is injected through the runner, filled in the cavity, and cooled and hardened, it has a shape corresponding to the shape of the insulator bracket (IB) of the vehicle suspension device to be cast.

<Core (20)>

The core 20 includes a main core 21 and a slide core 22 disposed in contact with each other between the coupled lower mold 11 and upper mold 12, and the slide core 22 , A pair of knurled cores 22-3 forming a knurled pattern portion 22-3b processed to have a pattern of a plurality of knurled grooves 22-3a along an annular shape in contact with the cavity. ).

The main core 21 includes a lower main core 21a disposed in the lower mold 11 and an upper main core 21b disposed in the upper mold 12 and detachably coupled to the lower main core 21a. Consisting of, the removal of foreign substances between the knurled concave grooves 22-3a by high-pressure compressed air separates the upper mold 12 from the lower mold 11 and the upper main core from the lower main core 21a ( 21b) is performed before each shot in the separated mold opening state.

In the present application, shot refers to filling, and 'high pressure' in 'removal of foreign substances between the knurled concave grooves 22-3a by high-pressure compressed air' refers to a pressure of 8 to 10 bar .

As described above, the removal of foreign matter between the knurled concave grooves 22-3a by high-pressure compressed air separates the upper mold 12 from the lower mold 11 and removes the upper main core 21b from the lower main core 21a. is performed before every shot in the separated mold opening state, so that foreign substances or fine particles caught between the grooves of the fine pattern of the mold corresponding to the knurled structure of the insulator bracket are removed before each shot before filling and molding the mold. It is possible to implement complete molding according to the machining dimensions of the mold by performing air cleaning to remove the adherent material with high-pressure compressed air, and then the lower mold 11 and the upper mold 12 are combined with each other from the mold open state to fill the casting. and molded to form an insulator bracket.

As described above, the pair of knurled cores 22-3 are processed to have a pattern of a plurality of knurled concave grooves 22-3a along the annular shape, and the knurled pattern part 22-3b is in contact with the cavity. After casting is injected into the cavity and cooled and molded, a knurled structure is formed at the contact area of the insulator bracket (IB) to the washer (W) disposed under the bolt head of the bolt fastened to the insulator bracket (IB) As a result, compared to the insulator bracket of the conventional vehicle suspension system in which the knurled structure is not formed, it is possible to withstand repeated impacts with a high fastening force between the washer W under the bolt head and the insulator bracket IB.

Each of the plurality of knurled concave grooves 22-3a has a cross section in the shape of an inverted isosceles triangle. According to this, the slide core 22 forms a knurled pattern portion 22-3b processed to have a pattern of a plurality of knurled concave grooves 22-3a along the annular shape in contact with the cavity, Since each of these knurled grooves 22-3a has a cross section of an inverted isosceles triangle shape, the insulator bracket, which is a product formed after casting and molding into the cavity, has a protruding shape corresponding to the shape of the knurled groove 22-3a. It has an isosceles triangle-shaped cross section and has a knurled shape. When the car body is fastened using this knurled shape, plastic deformation occurs as the sharp pitch-shaped part of the knurled shape contacts the washer, and the plastic deformation causes the contact area to widen. It has excellent clamping force compared to the clamping force of previously used insulator parts, so it is possible to prevent the product from being detached due to impact due to the high clamping force, and it is possible to provide consumers with a comfortable ride by suppressing noise and vibration.

Each of the pair of knurled cores 22-3 is formed with a hollow inside, and the inside of the hollow is divided into left and right separated left and right spaces 22L and 22R so that cooling water can flow in and out, but downstream and a separating plate 22-3c defining a space formed by a concave portion 22-3c1 that communicates the spaces of the left and right sides separated at the side end. With this configuration, the cooling water flows in through the left space 22L among the left and right spaces 22L and 22R, and passes through the space formed by the concave inlet 22-3c1 to the right space ( 22R).

In one embodiment, the slide core 22 is integrally formed, and the slide core 22 has a knurled pattern processed to have a pattern of a plurality of knurled concave grooves 22-3a along an annular shape. It includes a pair of knurled cores 22-3 forming the portion 22-3b over the entire length in a state in contact with the cavity.

In the above embodiment, the slide core 22 has a knurled pattern portion 22-3b processed to have a pattern of a plurality of knurled concave grooves 22-3a along an annular shape in a state in contact with the cavity Since it includes a pair of knurled cores 22-3 formed over the entire length, the overall length of the pair of knurled cores 22-3 is increased, and accordingly, the length of the space on the left and right sides is also increased. As a result, some time is required for the inflow and outflow of the cooling water, but since the slide core 22 is integrally configured, the work process and time during the manufacture of the slide core 22 are advantageous compared to those of a separate type. do.

In another embodiment, the slide core 22 includes a slide core body 22-1 and a change core 22-2 detachably coupled to the slide core body 22-1. A pair of knurled pattern portions 22-3b processed so that the core 22-2 has a pattern of a plurality of knurled grooves 22-3a along an annular shape in contact with the cavity. A pair of knurled cores 22-3 are detachably or detachably inserted into and coupled to the change core 22-2. In this way, the change core 22-2 forms a knurled pattern part 22-3b processed to have a pattern of a plurality of knurled concave grooves 22-3a along an annular shape in contact with the cavity. Since the pair of knurling cores 22-3 are detachably or detachably inserted into and coupled to the change core 22-2, the pair of knurled cores 22-3 The overall length of the knurled core 22-3 is shortened, and accordingly, the lengths of the spaces on the left and right sides are shortened, so that the time required for the inflow and outflow of cooling water is also shortened.

<Controller (C)>

The controller (C) is a first signal according to the first cycle time corresponding to the set time before the start of filling the casting in the cavity or a second signal according to the second cycle time required to fill the casting in the cavity for complete molding under casting conditions. It is configured to transmit a signal. As such, the controller (C) is the first signal according to the first cycle time corresponding to the set time (eg, 60 seconds) before the start of filling the casting in the cavity or the first signal required for filling the casting in the cavity for complete molding under casting conditions. A second signal according to 2 cycle time (eg, 30 seconds) may be transmitted.

In addition, the controller (C) controls the cooling water to be rapidly removed from the cooling water line 31 during the first operation of the pump 32 and rapidly removed from the cooling water line 31 during the second operation of the pump 32. The first signal and the second signal are configured to be supplied. According to this configuration, the 'rapid removal' refers to being removed between 0.5 and 1.5 seconds, and the 'quick supply' refers to being supplied between 0.5 and 1.5 seconds.

<The heat circulation cooling device (30)>

The warming circulation cooling device 30 starts from the outside of the lower mold 11 and cools the casting injected into the cavity from the inside of the lower mold 11 and the slide core 22 around the cavity. It is installed in the cooling water line 31 disposed and the cooling water line 31 outside the lower mold 11 to receive the first signal or the second signal and to receive the first operation or second signal according to the first signal. It is connected to the pump 32 in which the second operation according to the second operation is performed and the cooling water line 31 outside the lower mold 11 to supply the cooling water to the cooling water line 31 or recover and store it from the cooling water line 31 It consists of a cooling water supply source (33).

By having the warming circulation cooling device configured as above, the first operation according to the first signal or the second operation according to the second signal of the pump 32 is performed, so that the cooling water is supplied from the cooling water supply source 33 to the cooling water line 31. It becomes possible to supply or store it by recovering it from the cooling water line 31 to the cooling water supply source 33.

In one embodiment, the cooling water line 31 is connected to the cooling water line 31 outside the left side of the lower mold 11 to move the slide core 22 toward a direction remote from the cooling water supply source 33. A first cooling water line 31-1 disposed inside and extending vertically upward from the downstream end of the first cooling water line 31-1 inside the slide core 22 and then extending horizontally to the right a second cooling water line 31-2, a first inlet line extending horizontally from an upper end of the second cooling water line 31-2 toward a direction remote from the cooling water supply source 33, and the slide Inside the core 22, the communication space formed by the left space of the left knurled core 22-3 extending in a straight line from the first inlet line and the concave portion 22-3c1 and the left knurled core It consists of a first outlet line extending in a straight line from the space on the right side of the knurled core 22-3 on the left by the length of the space on the right side of (22-3) and the first inlet line to form a 'U' shape. a third cooling water line 31-3 forming a third cooling water line 31-3, and a fourth cooling water line 31-3 extending horizontally from the downstream end of the first outlet line so as to form an angle of 90° to the right side with the first inlet line. 4), a second inlet line extending in parallel in the same direction as the first inlet line from the downstream end of the fourth coolant line 31-4, and a right knurling extending in a straight line from the second inlet line The communication space formed by the space on the left side of the core 22-3 and the concave portion 22-3c1 and the space on the right side of the right knurled core 22-3 and the length of the second inlet line A fifth coolant line 31-5 composed of a second outflow line extending horizontally to the right after extending in a straight line from the space on the right side of the knurled core 22-3 on the right side and forming a 'U' shape, A sixth coolant line 31-6 extending vertically downward from the downstream end of the second outlet line by the length of the second coolant line 31-2 so as to form an angle of 90° perpendicular to the second inlet line. ) and the length of the first cooling water line 31-1 horizontally from the downstream end of the sixth cooling water line 31-6 so as to form an angle of 90° vertically with the sixth cooling water line 31-6. and a seventh cooling water line 31 - 7 extending by the same distance and disposed in a direction close to the cooling water supply source 33 .

According to the above configuration, the cooling water is introduced through the left space 22L among the left and right spaces 22L and 22R, and flows through the space formed by the concave portion 22-3c1 to the right space 22R. ), the left and right knurled cores 22-3 are cooled while flowing out, and accordingly, the knurled core 22- 3) The cavity and the casting filled in the cavity in contact with the knurled pattern portion 22-3b may be molded by cooling.

<Air hole foreign matter removal device (40)>

The air hole foreign matter removal device 40 includes a compressor 41 connected to the controller C and performing a third operation according to the first signal, and a compressor 41 connected to the compressor 41 according to the third operation The high-pressure compressed air supplied from the compressor 41 is injected toward the knurled pattern portion 22-3b to remove foreign substances between the plurality of knurled concave grooves 22-3a to the lower mold 11 It consists of the air line 42 which is arrange|positioned.

According to the above configuration, the high-pressure compressed air supplied from the compressor 41 according to the third operation is injected toward the knurled pattern portion 22-3b, thereby reducing the gap between the plurality of knurled concave grooves 22-3a. Foreign substances can be removed. In other words, before every shot, air cleaning is performed to remove foreign substances or fine sticking substances stuck between the grooves of the micropattern of the mold corresponding to the knurled structure of the insulator bracket with high-pressure compressed air. It is possible to implement complete molding according to the processing dimensions of

The present invention described above has been described with reference to one embodiment shown in the drawings, but this is only exemplary, and those skilled in the art can make various modifications and equivalent other embodiments therefrom. will have to be clarified. Therefore, the true technical protection scope of the present invention should be construed by the appended claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10: mold
11: lower mold
12: upper mold
20: core
21: main core
21a: lower main core
21b: upper main core
22: slide core
22-1: Core body
22-2: change core
22-3: knurled core
22-3a: Knurling concave groove
22-3b: knurled pattern part
22-3c: Separator
22-3c1: recessed part
30: heat circulation cooling device
31: coolant line
31-1: first cooling water line
31-2: 2nd cooling water line
31-3: 3rd coolant line
31-4: 4th cooling water line
31-5: 5th cooling water line
31-6: 6th cooling water line
31-7: 7th cooling water line
32: pump
33: cooling water source
40: air hole foreign matter removal device
41 : Compressor
42: air line
C: Controller

Claims (7)

delete delete It includes a lower mold 11 and an upper mold 12 that is separated and coupled to the upper part of the lower mold 11, and is connected to the runner through which the casting is injected and flows, and the vehicle suspension device to be cast. A mold 10 in which a cavity having a shape corresponding to the shape of the insulator bracket IB is formed; and
It includes a main core 21 and a slide core 22 disposed in contact with each other between the coupled lower mold 11 and upper mold 12, and the slide core 22 has a plurality of rings along an annular shape. A core 20 including a pair of knurled cores 22-3 forming a knurling pattern portion 22-3b processed to have a knurled concave groove 22-3a-shaped pattern in contact with the cavity. );and
A controller configured to transmit a first signal according to a first cycle time corresponding to a set time before the start of filling the casting in the cavity or a second signal according to a second cycle time required to fill the casting in the cavity for complete molding under casting conditions ( C); with
A cooling water line (31) disposed around the cavity to cool the casting injected into the cavity, starting from the outside of the lower mold (11) and inside the lower mold (11) and the slide core (22); A pump 32 installed in the cooling water line 31 outside the lower mold 11 to receive the first signal or the second signal and perform a first operation according to the first signal or a second operation according to the second signal ) and a cooling water supply source 33 connected to the cooling water line 31 outside the lower mold 11 to supply cooling water to the cooling water line 31 or recover and store cooling water from the cooling water line 31. cooling device 30; and
A compressor 41 connected to the controller C and performing a third operation according to the first signal, and a high-pressure compressed air connected to the compressor 41 and supplied from the compressor 41 according to the third operation is sprayed toward the knurled pattern portion 22-3b to remove foreign substances between the plurality of knurled concave grooves 22-3a, which is composed of an air line 42 disposed in the lower mold 11 Including an air hole foreign matter removal device 40,
Each of the pair of knurled cores 22-3 is formed with a hollow inside, and the inside of the hollow is divided into left and right separated left and right spaces 22L and 22R so that cooling water can flow in and out, but downstream It includes a separating plate 22-3c forming a space formed by a concave portion 22-3c1 that communicates the spaces of the left and right sides separated at the side end,
The slide core 22 is integrally configured, and the slide core 22 has a plurality of knurled concave grooves 22-3a along an annular shape. A knurled pattern portion 22-3b processed to have a pattern. A pair of knurled cores 22-3 forming over the entire length in a state in contact with the cavity,
The slide core 22 includes a slide core body 22-1 and a change core 22-2 detachably coupled to the slide core body 22-1, and the change core 22-2 A pair of knurled cores 22- forming a knurled pattern portion 22-3b processed to have a pattern of a plurality of knurled concave grooves 22-3a along an annular shape in contact with the cavity 3), wherein the pair of knurled cores 22-3 are detachably or detachably inserted into and coupled to the change core 22-2. According to claim 3 ,
The cooling water line 31,
A first cooling water line 31-1 connected to the cooling water line 31 outside the left side of the lower mold 11 and disposed inside the slide core 22 toward a direction remote from the cooling water supply source 33; and ,
A second coolant line 31-2 extending vertically upward from the downstream end of the first coolant line 31-1 inside the slide core 22 and then horizontally extending to the right side;
A first inlet line extending horizontally from the upper end of the second coolant line 31-2 toward a direction remote from the coolant supply source 33, and from the first inlet line inside the slide core 22 The communication space formed by the space on the left side of the left knurled core 22-3 extending in a straight line and the concave portion 22-3c1, the space on the right side of the left knurled core 22-3, and the first A third coolant line 31-3 consisting of a first outlet line extending in a straight line from the space on the right side of the left knurled core 22-3 by the length of the inlet line and forming a 'U'shape;
a fourth coolant line (31-4) extending horizontally from the downstream end of the first outlet line to form an angle of 90° to the right side with the first inlet line;
A second inlet line extending in parallel in the same direction as the first inlet line from the downstream end of the fourth coolant line 31-4, and a right knurled core 22- extending in a straight line from the second inlet line The communication space formed by the space on the left side of 3) and the concave portion 22-3c1 and the space on the right side of the right knurled core 22-3 and the length of the second inlet line are the same as the right side knurled core A fifth coolant line (31-5) formed of a 'U' shape, consisting of a second outlet line extending straight from the space on the right side of (22-3) and then horizontally extending to the right side;
A sixth coolant line 31-6 extending vertically downward from the downstream end of the second outlet line by the length of the second coolant line 31-2 so as to form an angle of 90° perpendicular to the second inlet line. )class,
It extends horizontally from the downstream end of the sixth cooling water line 31-6 by the length of the first cooling water line 31-1 so as to form an angle of 90° vertically with the sixth cooling water line 31-6. A fastening surface knurled structure insulator bracket mold comprising a seventh cooling water line (31-7) disposed in a direction close to the cooling water supply source (33). According to claim 3 ,
The controller (C),
The first signal and the second signal so that the cooling water is rapidly removed from the cooling water line 31 during the first operation of the pump 32 and rapidly supplied from the cooling water line 31 during the second operation of the pump 32 A fastening surface knurled structure insulator bracket mold, characterized in that it constitutes a signal. According to claim 3 ,
The coupling surface knurled structure insulator bracket mold, characterized in that each of the plurality of the knurling concave grooves (22-3a) has a cross section in the shape of an inverted isosceles triangle. According to claim 3 ,
The main core 21 includes a lower main core 21a disposed in the lower mold 11 and an upper main core 21b disposed in the upper mold 12 and detachably coupled to the lower main core 21a. consists of,
Removal of foreign substances between the knurled concave grooves 22-3a by high-pressure compressed air separates the upper mold 12 from the lower mold 11 and separates the upper main core 21b from the lower main core 21a. A fastening surface knurled structure insulator bracket mold, characterized in that it is made before each shot in the mold opening state.

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