KR102062497B1 - Injection mold for air intake hose - Google Patents

Abstract

The present invention relates to an injection mold for forming an intake hose. According to the present invention, the injection mold for an intake hose comprises: a lower mold accommodating unit; an upper mold accommodating unit provided at the lower mold accommodating unit, and forming a mold accommodating space therein; a first main core accommodated in the mold accommodating space to form at least a part of an inner mold including a bellows unit of an intake hose; a second main core accommodated in the mold accommodating space to be coupled to the first main core, forming the inner mold of the intake hose, and having an air outlet formed on a contact surface with the first main core to discharge air supplied from the outside when being coupled; a pair of first side molds provided on both side surfaces to surround at least a part of the first and second main cores, and coupled to each other to form an outer mold of the intake hose; a pair of second side molds provided on both side surfaces to surround a part of a remainder of the first and second main cores, and coupled to each other to form the outer mold of the intake hose; a first mold moving means provided at the outside of each of the pair of the first side molds to horizontally move each of the pair of the first side molds; a second mold moving means provided at the outside of each of the pair of the second side molds to horizontally move each of the pair of the second side molds; a first main core moving means provided at the outside of the first main core to horizontally move the first main core; and a second main core moving means provided at the outside of the second main core to move the second main core in a diagonal direction.

Description

Injection mold for intake hose {Injection mold for air intake hose}

The present invention relates to an injection apparatus comprising an injection mold for intake hose and a metering line.

Fuel and air are required to operate the engine, which is the power source in driving the vehicle, and cold air (new air) required by the engine is supplied from the outside of the vehicle to the engine through an intake system. Here, the intake system applies an intake hose that connects the air filter and the engine to function to filter foreign matter such as dust or sand contained in the air flowing from the outside of the vehicle, and to insulate the vibration generated from the engine. do.

The material of intake hose applied to the intake system of the engine is usually made of rubber, thermoplastic elastomer (TPE), etc. Among them, thermoplastic elastomer (hereinafter referred to as 'TPE') is lighter in weight than rubber. There is an advantage of excellent durability has been used a lot.

The intake hose made of TPE is manufactured by injection molding, and a conventional injection mold used in injection molding is separated to form an outer shape of the intake hose, and forms a cavity inside when the mutual coupling is formed. And a main core disposed in the cavity between the upper and lower molds to form an inner mold of the intake hose.

The injection mold configured as described above injects molten TPE material through an injection machine that receives molten raw material and injects the intake hose. When the molding is completed, the upper and lower molds are separated, and the upper and lower molds are separated. The main core is separated from the cavity. Thereafter, the worker takes out the intake hose from the main core to which the molding is completed on the outer peripheral surface of the main core.

Conventional injection mold for intake hose, after the completion of the molding of the intake hose, it is inefficient for the operator to take out the finished product of the intake hose from the main core through a number of working processes as described above. Even in the case of supplying air from the inside, such as 0000411, it is difficult to take out the intake hose smoothly under a practical working environment and there may be a problem in quality.

The present invention provides an injection mold for intake hose that can be easily taken out of the intake hose from the main core after injection molding is completed and can be made without damaging the product.

In the injection mold for forming an intake hose, the injection mold for intake hose according to the present invention, the lower mold receiving portion; An upper mold accommodating part provided on the lower mold accommodating part to form a mold accommodating space therein; A first main core accommodated in the mold receiving space to form at least a portion of an inner mold including a bellows part of the intake hose; An air discharge port configured to be coupled to the first main core to form an inner mold of the intake hose, and to discharge air supplied from the outside to the contact surface with the first main core when the die is accommodated in the mold receiving space; 2 main cores; First side mold pairs provided on both sides to surround at least a portion of the first main core and the second main core, and coupled to each other to form an outer mold of the intake hose; A pair of second side molds provided on both sides of the first main core and the remaining part of the second main core, and coupled to each other to form an outer mold of the intake hose; First mold moving means provided on an outer side of each of the first side mold pairs to move the first side mold pairs in a horizontal direction; Second mold moving means provided on an outer side of each of the second side mold pairs to move the second side mold pairs in a horizontal direction, respectively; First main core moving means provided on an outer side of the first main core to move the first main core in a horizontal direction; And a second main core moving unit provided outside the second main core to move the second main core in an oblique direction.

In addition, the upper mold receiving portion is penetrated with the mold receiving space is formed with a first raw material inlet, the raw material is introduced, and coupled to at least one of the first side mold pair and the second side mold pair, respectively to form an inner space portion In this case, a second raw material inlet is formed in communication with the first raw material inlet so that the raw material can be introduced into the inner space.

In addition, the second raw material inlet is formed on the contact surface of at least one of the first side mold pair and the second side mold pair.

In addition, a raw material receiving groove is formed in a groove shape along the contact surface of at least one of the first side mold pair and the second side mold pair with respect to the second raw material inlet.

In addition, the second main core moving means, the fourth cylinder for providing a horizontal movement force; A fourth cylinder portion engaging portion coupled to the fourth cylinder portion and moving in a horizontal direction, the inclined surface being formed toward the second main core; And a combination with the second main core, coupled to the bevel surface of the fourth cylinder portion engaging portion to move when the fourth cylinder portion moves to the second main core side, and the fourth cylinder portion to the opposite side of the second main core. And a second main core coupler which descends when moved.

The first mold moving means may include: a first mold guide part fixed to the lower mold receiving part and having a guide groove having a length along a moving direction of the first side mold; And a guide rod formed in a rod shape having a predetermined length and provided in an oblique direction to penetrate the guide groove of the first mold guide part, and moving in a horizontal direction along the guide groove. A guide rod receiver is formed in which an end of the guide rod is accommodated and fixed.

In addition, the guide rod is provided to be inclined upward from the outside toward the first side mold side.

According to the intake hose injection mold and the intake hose manufacturing method using the same according to an embodiment of the present invention, the efficiency and yield of the injection molding is increased, and the take-out of the intake hose that is completed from the main core can be easily removed without damaging the product. Can be done.

1 and 2 are respectively a perspective view and a rear perspective view of the injection mold for intake hose according to an embodiment of the present invention.
3 is a plan view of the injection mold for intake hose of FIG.
Figure 4 is an exploded perspective view showing the external components of the injection mold for intake hose according to an embodiment.
Figure 5 is an exploded perspective view showing the mold-related components of the injection mold for intake hose according to an embodiment.
6 is a perspective view showing an intake hose manufactured according to an embodiment of the present invention.
FIG. 7 is a schematic perspective view illustrating components related to movement and coupling of a second mold pair. FIG.
FIG. 8 is a schematic perspective view for explaining components related to movement and coupling of the first side mold. FIG.
9 is a schematic perspective view for explaining a movement related component of the first main core.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Unless otherwise defined or mentioned, terms indicating directions used in the present description are based on the states shown in the drawings. In addition, the same reference numerals throughout the embodiments indicate the same member. On the other hand, each of the components shown in the drawings may be exaggerated in thickness or dimensions for the convenience of description, and does not mean that actually should be configured by the ratio between the dimensions or configurations.

1. Manufacturing Equipment

1 and 2 are respectively a perspective view and a back perspective view of the injection mold for intake hose according to an embodiment of the present invention, Figure 3 is a plan view of the injection mold for intake hose of FIG. 4 is an exploded perspective view showing the external components of the injection mold for intake hose according to an embodiment.

Injection mold 100 for the intake hose according to an embodiment of the present invention is a support plate 110, the support 120, the lower mold receiving portion 130 as an external component for forming a mold and accommodate the mold therein , The upper mold receiving portion 140, the upper cover plate 150.

The support plate 110 is fixed to the entire mold apparatus including the injection mold 100 for the intake hose according to the present embodiment to support the load of the other components. The support part 120 is fixed on the support plate 110.

The lower mold accommodating part 130 and the upper mold accommodating part 140 have a predetermined space formed therein to accommodate a plurality of mold configurations to be described later. The four sides of the lower mold receiving portion 130 and the upper mold receiving portion 140 on the contact surface side move the molds to be combined in the lower mold receiving portion 130 and the upper mold receiving portion 140 to produce the raw material for intake hose manufacturing. Configurations forming a space for injection are exposed to the outside.

The lower mold receiving part 130 includes the first main core moving means 270, the second mold moving means 370 and 470, and the second main core in four directions D1, D2, D3, and D4 forming right angles with each other. A groove-shaped space is formed so that the moving means 570 can be exposed to the outside. That is, the first main core moving unit 270, the second mold moving unit 370 and 470, and the second main core moving unit 570 are contact surfaces between the lower mold receiving unit 130 and the upper mold receiving unit 140. It is configured to have a constant length from the four sides to the outside. The first main core moving means 270, the second mold moving means 370 and 470, and the second main core moving means 570 will be described in detail below.

The upper mold receiving part 140 and the upper cover 150 are formed with first material input holes 145 and 155 penetrating up and down. The material for forming the intake hose is introduced into the first raw material inlets 145 and 155.

A mold and related components according to an embodiment will be described with reference to FIGS. 5 to 10. Figure 5 is an exploded perspective view showing the mold-related components of the injection mold for intake hose according to an embodiment, Figure 6 is a perspective view showing the intake hose manufactured according to an embodiment of the present invention. 7 is a schematic perspective view for explaining the movement and coupling components of the second mold pair, Figure 8 is a schematic perspective view for explaining the movement and coupling components of the first side mold. 9 is a schematic perspective view for explaining a movement related component of the first main core, and FIG. 10 is a schematic perspective view for explaining a movement related component of the second main core.

Referring to FIG. 5, the first main core 600, the second main core 650, the pair of first side molds 700a and 700b and the pair of second side molds 800a and 800b are the lower molds described above. It is accommodated in a mold accommodating space formed between the accommodating portion and the upper mold accommodating portion to form a space for forming the intake hose 900 shown in FIG. 6 through injection.

The first main core 600 is a component for forming at least a portion of the inner mold 601 including the bellows portion 901 of the intake hose. That is, the first main core 600 may form a predetermined space between the first side mold pair 700 to form at least some of the bellows portion 901 and the remaining portion of the intake hose.

The second main core 650 is combined with the first main core 600 to form an inner mold of the remaining part of the intake hose. An air discharge port 659 is formed in the second main core 650 to discharge air supplied from the outside to the contact surface with the first main core 600. An air inlet 658 is formed at the other side of the main body 651 of the second main core 650, and the air inlet 658 and the air discharge port 659 are formed in the main body 651. Communicate through (not shown).

The first side mold pair 700 is provided on both sides to surround at least a portion of the first main core 600 and the second main core 650, and are coupled to each other to form an outer mold of the intake hose. That is, the first side mold pair 700 functions as a mold for forming at least a portion of the intake hose including the bellows portion 901.

The second side mold pair 800 is provided on both sides to surround the remaining part of the first main core 600 and the second main core 650, and are coupled to each other to form an outer mold of the intake hose. That is, the second side mold pair 800 is coupled to each other to form an outer shape of at least some of the remaining portions of the intake hose except the bellows portion.

Referring to FIG. 5, at least one of the first side mold pair 700 and the second side mold pair 800 may be in communication with the first raw material inlet at an upper portion thereof, and the raw material may be introduced into the inner space part. The second raw material inlet 808 is formed to be. Semicircular grooves are formed on the cross-sections of the first side molds 700a and 700b, respectively, and when the first side mold molds 700a and 700b are in contact with each other, the semicircular grooves are connected to each other to form a second raw material inlet. 808 is formed.

In addition, the raw material receiving grooves 807 and 707 are formed along the upper contact surface of at least one of the first side mold pair 700 and the second side mold pair 800 around the second raw material inlet 808. When the raw material receiving grooves 807 and 707 form grooves in the horizontal direction around the second raw material inlet 808, the raw materials are injected out through the first raw material inlet as described above to prevent the outflow of raw materials to the outside. It serves to gather to the second raw material inlet 808 side.

Referring to FIG. 7, the second mold moving means 370 is provided on the outside of each of the second side mold pairs 800 to move the second side mold pairs to the outside horizontal direction, respectively. For convenience of description, the description of the second mold moving means 470 on the other side will be omitted.

The second mold moving means 370 includes a first cylinder portion 371, a cylinder arm 372, and a coupling portion 391. The first cylinder portion 371 serves to transmit force in the horizontal direction by pushing or pulling the cylinder arm 372. An engaging portion 391 is formed at the end of the cylinder arm 372. Coupling portion 391 is fixedly coupled to the first coupling groove (891) formed in the second side mold (800a, 800b).

Referring to FIG. 8, the first mold moving means is provided on the outside of each of the first side mold pairs 700 to move the first side mold pairs 700 in the horizontal direction, respectively.

The first mold moving means includes a first mold guide part 708, a guide rod 709, and an external force providing part (not shown). The first mold guide part 708 is fixed to the lower mold accommodating part described above, and a guide groove 7071 having a length along the moving direction of the first side mold 700 is formed. The guide rod 709 is formed in a rod shape having a predetermined length and penetrates the guide groove 7071 of the first mold guide portion 708 in a state of being fixed to the upper mold receiving portion 140 (see FIG. 2) described above. It is provided. The guide rod 709 serves as a guide for moving the first side mold pair 700. That is, the first side mold pair 700 is moved diagonally along the guide rod 709 when receiving the force in the lateral direction. The first side mold 700 has a guide rod receiving opening 707 in which an end of the guide rod 709 is received and fixed.

Referring to FIG. 9, the first main core 600 is moved in the horizontal direction by the first main core moving means 270. The detailed configuration of the first main core moving means 270 is similar to the operation method of the first mold moving means shown in FIG.

The second cylinder 271 provides a horizontal moving force, and the coupling portion 291 provided at the end of the cylinder arm 272 is formed in the coupling groove 281 formed in the first main core coupling portion 280. Combine them together. The first main core 600 is moved to the horizontal direction in accordance with the operation of the second cylinder 271 in a state coupled to the first main core coupling portion 280.

Referring to FIG. 10, the second main core moving means 570 is provided outside the second main core 650 to move the second main core. The second main core moving means 570 pushes down the second main core 650 in an oblique direction or pulls the second main core 650 downward. Specifically, the second main core moving means 570 has a fourth cylinder portion 571. The fourth cylinder portion 571 provides a force in the horizontal direction, and the coupling portion 591 provided at the end of the cylinder arm 572 is conformed to the coupling groove 581 of the fourth cylinder portion coupling portion 580. To combine. The fourth cylinder coupling portion 580 is thus connected to the fourth cylinder portion 570 to move in the horizontal direction. On the other hand, the fourth cylinder portion engaging portion 580 is formed with a guide comb surface 583 of the comb surface shape toward the second main core 650 side. The inclined surface coupling portion 587 of the second main core coupling portion 585 is coupled to the guide inclined surface 583. Due to this structure, when the fourth cylinder coupling part 580 moves toward the second main core 650, the second main core coupling part 585 is pushed upward while being moved to the second main core 650. On the contrary, when the fourth cylinder coupling part 580 moves to the opposite side of the second main core 650, the second main core coupling part 585 moves downward while moving to the opposite side of the second main core 650. do.

2. Injection raw materials

The raw material injected into the injection mold for intake hose having such a structure has the following composition.

Specifically, the injection mold for intake hose is injected with TPE (Thermo Plastic Elastomer), that is, a thermoplastic elastomer, and includes PP (poly propylene) and EPDM (ethylene propylene diene monomer) as main components.

EPDM (Ethylene Propylene Diene Terpolymer) is a terpolymer in which ethylene, propylene and diene are irregularly bonded. EPDM has no double bonds (less binding energy than single bonds) in the main chain, so it has strong resistance to heat, light, ozone, etc., and is excellent in heat resistance and weather resistance and hardly deteriorates.

The injection raw material according to this embodiment is formed of 37% to 58% EPDM rubber and 42% to 63% polypropylene.

When EDPM rubber is included in less than 37%, the workability is poor and the extraction work is difficult and at the same time the heat resistance is reduced, there is a fear that deformation in the connection portion with the car engine. In addition, when EDPM rubber is included in excess of 58%, the extraction operation is easy, but the problem of poor form retention occurs. In other words, it is possible to minimize heat deformation and improve take-out and at the same time to maintain the shape of the hose in the range satisfying the range of 37% to 58% EPDM rubber 42% to 63% polypropylene. In other words, polypropylene is required to maintain the shape of the product, but when excessively included, the hardness increases more than necessary, resulting in poor processability and product characteristics.

The method of manufacturing the intake hose by combining the manufactured parts after forming each part by dividing each part of the intake hose into parts can be manufactured differently, but the injection molding of the intake hose as a single piece is performed. It becomes difficult to select the appropriate injection material. However, when forming an intake hose in the range satisfying the range of 37% to 58% of EPDM rubber and 42% to 63% of polypropylene at the same time as in the present embodiment, it is possible to meet all the needs of each part.

In other words, in forming the intake hose using the injection mold and the injection apparatus according to the present invention, only the injection material having the composition range as described above can be easily separated from the intake hose according to the injection of air, while maintaining the injection quality. The product prototype can be maintained during injection.

3. Manufacturing process (control of injection conditions)

Table 1 below describes the injection conditions. Thermal resin temperature, injection speed, pressure, cooling time, etc. are important factors in the injection work process and conditions according to the present embodiment, and all the injection mold and metering (back pressure) lines described above are controlled by separate controllers (not shown). The injection apparatus is controlled to perform an injection process.

TABLE 1

Table 1 is a table showing the heater temperature of the injection conditions applied to the injection process. As shown in Table 1, the nozzle temperature (NH) and the temperatures of the heaters in the temperature control zone (HT 1 to 4) proceed in order of 225, 220, 220, 200, 190 degrees Celsius (error range ± 5 degrees Celsius), respectively. do.

TABLE 2

Table 2 is an injection condition table showing the injection pressure, speed and injection position.

The injection speed means the amount of injection molding material per unit time. The injection speed should be considered to be suitable for the type of resin and the shape of the molded article. If the injection speed is slowed down, the melt viscosity decreases, which may lead to unforming (short shot), flow marks, severe weld lines, and poor surface gloss, which do not completely fill the cavity of the mold. This can be

TABLE 3

Table 3 is a table showing other injection conditions, showing injection time and cooling time (preferably less than about 5% error) and back pressure, metering and cushioning.

Back pressure is the pressure that blocks in the reverse direction. The higher the pressure, the denser the injection product is, and the order is realized as 4/7/5/3 (kg / cm ² ). When the back pressure is low, the amount of elasticity is put in order to compensate for the lack. When the pressure is low, the filling is not stable due to the deviation of the metering. Lose. It is desirable that the above injection conditions have an error range of less than 5% in consideration of mechanical differences and tolerances, respectively.

These injection conditions are conditions for maintaining the quality of the final product when the injection operation is carried out by putting the injection material of a specific composition ratio in the injection mold and the device described above.

Although the preferred embodiment of the present invention has been described above, the technical idea of the present invention is not limited to the above-described preferred embodiment, and may be variously implemented in a range without departing from the technical idea of the present invention specified in the claims. have.

600: first main core
650: second main core
700: first side mold pair
700a, 700b: first side mold
800: second side mold pair
800a, 800b: second side mold
707, 807: raw material receiving groove
808: second raw material inlet

Claims (7)

In the injection mold forming the intake hose,
Lower mold receiving portion;
An upper mold accommodating part provided on the lower mold accommodating part to form a mold accommodating space therein;
A first main core accommodated in the mold receiving space to form at least a portion of an inner mold including a bellows part of the intake hose;
An air discharge port configured to be coupled to the first main core to form the inner mold of the intake hose, and to discharge air supplied from the outside to the contact surface with the first main core at the time of coupling; 2 main cores;
First side mold pairs provided on both sides to surround at least a portion of the first main core and the second main core, and coupled to each other to form an outer mold of the intake hose;
A pair of second side molds provided on both sides of the first main core and the remaining part of the second main core, and coupled to each other to form an outer mold of the intake hose;
First mold moving means provided on an outer side of each of the first side mold pairs to move the first side mold pairs in a horizontal direction;
Second mold moving means provided on an outer side of each of the second side mold pairs to move the second side mold pairs in a horizontal direction, respectively;
First main core moving means provided on an outer side of the first main core to move the first main core in a horizontal direction; And
And a second main core moving unit provided outside the second main core to move the second main core in an oblique direction.
The second main core moving means,
A fourth cylinder portion providing a horizontal movement force;
A fourth cylinder portion engaging portion coupled to the fourth cylinder portion and moving in a horizontal direction, the inclined surface being formed toward the second main core; And
Coupling with the second main core, coupled to the inclined surface of the fourth cylinder portion engaging portion is raised when the fourth cylinder portion moves to the second main core side and the fourth cylinder portion moves to the opposite side of the second main core Injection mold for intake hose comprising a; second main core engaging portion to fall. The method of claim 1,
The upper mold receiving portion is formed with a first raw material inlet through which the raw material is penetrated through the mold receiving space,
At least one of the first side mold pair and the second side mold pair may be coupled to each other to form an inner space part. Injection mold for intake hose with raw material inlet. The method of claim 2,
The second raw material injection hole is an injection mold for intake hose formed on the contact surface of at least one of the first side mold pair and the second side mold pair. The method of claim 3,
An injection mold for an intake hose, wherein a raw material receiving groove is formed along a contact surface of at least one of the first side mold pair and the second side mold pair with a center of the second raw material inlet. delete The method of claim 1,
The first mold moving means,
A first mold guide part fixed to the lower mold receiving part and having a guide groove having a length along a moving direction of the first side mold; And
And a guide rod formed in a rod shape having a predetermined length, provided in an oblique direction to penetrate the guide groove of the first mold guide part, and moving in a horizontal direction along the guide groove.
The first side mold is an injection mold for intake hose that is formed with a guide rod receiving port is received and fixed to the end of the guide rod. The method of claim 6,
The guide rod injection mold for intake hose is provided to be inclined upward from the outside toward the first side mold side.

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