KR20170014326A - Mold apparatus for insert parts of pulsator - Google Patents

Mold apparatus for insert parts of pulsator Download PDF

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Publication number
KR20170014326A
KR20170014326A KR1020150107457A KR20150107457A KR20170014326A KR 20170014326 A KR20170014326 A KR 20170014326A KR 1020150107457 A KR1020150107457 A KR 1020150107457A KR 20150107457 A KR20150107457 A KR 20150107457A KR 20170014326 A KR20170014326 A KR 20170014326A
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KR
South Korea
Prior art keywords
mold
lower mold
upper mold
insert
main body
Prior art date
Application number
KR1020150107457A
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Korean (ko)
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KR101732355B1 (en
Inventor
이현봉
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이현봉
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Priority to KR1020150107457A priority Critical patent/KR101732355B1/en
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Publication of KR101732355B1 publication Critical patent/KR101732355B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2245—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies having walls provided with means for marking or patterning
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F17/00—Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid
    • D06F17/06—Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid by rotary impellers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

According to the present invention, a mold apparatus for manufacturing insert parts insert-molded in a pulsator for a washer having a main body having a mounting hole to insert and mount a drive shaft of a motor and a plurality of protrusions which are formed on an outer circumferential surface of the main body in a circumferential direction and protrude in a direction away from the main body comprises: an upper mold having a first forming groove; a lower mold which is mounted and separated from the upper mold, and has a second forming groove to form a cavity to form the main body with the first forming groove when mounted on the upper mold, and a plurality of lead grooves formed on an inner circumferential surface of the second forming groove to form the protrusions; a core member installed in the upper mold to be inserted into the second forming groove to form the mounting hole of the main body; a discharge unit to press the insert parts manufactured in the cavity to discharge the insert parts from the lower mold; and a separation prevention unit to prevent the insert parts manufactured in the cavity from being separated from the lower mold with the upper mold when separating the upper mold from the lower mold. The mold apparatus for manufacturing insert parts for a pulsator can manufacture insert parts for a pulsator by a die-casting method. When the upper and the lower mold are separated from each other, a product is restricted to the lower mold to easily discharge the product. Therefore, product productivity is improved.

Description

[0001] The present invention relates to a mold apparatus for manufacturing an insert part for a pulsator,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold apparatus for manufacturing an insert part for pulsator, and more particularly, to a mold apparatus for manufacturing an insert part that is insert molded into a pulsator at the time of manufacturing a pulsator for a washing machine.

Generally, a washing machine is a household appliance capable of washing laundry by flow of washing water generated by forcibly flowing supplied washing water, friction caused by the washing water, and emulsifying effect of detergent. The washing process of the washing machine is generally performed by washing, rinsing , Dehydration, and water supply / drainage processes.

A typical agitating type washing machine is provided with a cylindrical outer tank for storing wash water for washing in a housing constituting the outer shape of a washing machine, and a washing tank in which laundry is accommodated is rotatably installed on the inner side of the outer tank And a pulsator for forcedly flowing the washing water in the laundry by stirring rotation is formed on the bottom of the washing tub.

In addition, a driving motor for generating power for rotationally driving the washing tub and pulsator is provided below the outer tub.

The pear setter is constituted by a plurality of washing wings radially extending from the center of the washing tub, and the washing wing is formed as a single body with the central part having the highest blade shape, and generates rotating water of washing water while rotating. At this time, a shaft connecting portion connected to the drive shaft of the driving motor is installed at the center portion of the pulser. The shaft connecting portion is formed by insert molding of insert parts formed of a metallic material such as zinc into a pulsator.

However, in the past, insert parts have been manufactured by using powder sintering method, which involves a number of processes such as mixing of zinc powder with lubricating powder, molding process, sintering process, shaping process, impregnation process, packaging process and commercialization process. Therefore, there is a disadvantage that a lot of steps are required for manufacturing the insert parts, which requires a long production time.

Disclosure of the Invention The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an insert part for a pulsator, which can be manufactured by a die casting method, The present invention has been made in view of the above problems.

According to another aspect of the present invention, there is provided a mold apparatus for manufacturing insert parts for pulsators, the apparatus comprising: a main body having a coupling hole formed therein so that a drive shaft of the motor can be inserted and coupled; And a plurality of protrusions protruding in a direction away from the upper mold, the insert mold being insert-molded inside the pulsator for a washing machine, the mold apparatus comprising: an upper mold having a first molding groove; A second molding groove for forming a cavity for molding the main body together with the first molding groove when the mold is molded with the upper mold is formed and a plurality of protrusions are formed on the inner circumferential surface of the second molding groove, A lower mold having a lead groove of the main body, A take-out unit that presses the insert part so that the insert part made in the cavity can be taken out from the lower mold; and a take-out unit that, when the upper mold is separated from the lower mold, And a separation preventing part for preventing the insert part from being separated from the lower mold together with the upper mold.

The insert part is protruded from the lower mold to the outer circumferential surface of the body between the protruding projections so that the upper mold can be restrained by the lower mold when the upper mold is separated from the lower mold and when the pressing force is applied from the take- And the release preventing portion is formed on the inner circumferential surface of the second molding groove between the lead grooves so that the locking protrusion 31 is formed in a direction away from the center of the second molding groove It is preferable that a lead-in groove is formed at a predetermined depth.

The lower mold is communicated with the second molding groove so that molten metal injected into the cavity can be introduced into the cavity, and a communication space having an open top is formed.

A mold apparatus for manufacturing an insert part for pulsator according to the present invention is characterized in that the mold apparatus is connected to the lower mold and communicates with the injection path formed in the lower mold so that the molten metal is injected into the second molding groove, A lower sleeve having an upper mold and a lower sleeve, and a lower sleeve installed on the upper mold so that the upper mold can be coupled to the lower sleeve when the upper mold is molded, the upper mold having an injection port through which the molten metal is injected, And an upper sleeve having an inner space communicating with the communication path when the molten metal is coupled to the lower sleeve so that the injected molten metal can be introduced into the communication path.

The mold apparatus for manufacturing the insert part for pulsator according to the present invention can be manufactured by die casting method because the insert parts for pulsator can be manufactured by die casting method and when the upper and lower molds are separated from each other, Productivity is improved.

1 is a perspective view of an insert part manufactured using a mold apparatus according to the present invention,
2 is a cross-sectional view of a mold apparatus for manufacturing an insert part for pulsator according to the present invention,
FIG. 3 is an exploded perspective view of a mold apparatus for manufacturing insert parts for pulsator of FIG. 2,
4 to 6 are cross-sectional views illustrating a method of manufacturing insert parts using a mold apparatus for manufacturing insert parts for pulsator of FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a mold apparatus for manufacturing an insert part for pulsator according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an insert part 10 for a pulsator manufactured using a mold apparatus according to the present invention. Referring to FIG. 1, an insert part 10 is insert-molded into a pulsator for a washing machine, and includes a main body 20 having a coupling hole 21 to allow a driving shaft of a motor to be inserted and coupled, And has a plurality of protruding protrusions 300 protruding in a direction away from the main body 20.

The main body 20 has a predetermined outer diameter and is formed into a cylindrical shape extending in the vertical direction. The coupling hole 21 is vertically provided at the center of the main body 20. At this time, a plurality of second gears 22 are formed on the inner circumferential surface of the coupling hole 21 so as to be spaced from each other along the circumferential direction so as to be engaged with a plurality of first gears (not shown) formed on the outer circumferential surface of the drive shaft.

The protrusion protrusion 300 protrudes in a direction away from the main body 20, and is formed to extend along the vertical direction by a predetermined length. The number of the protrusions 300 is not limited to the illustrated example but may be determined depending on the shape or size of the pulsator.

A plurality of locking projections 31 deformed by a pressing force of a drawing unit, which will be described later, when the insert parts 10 are pulled out from the lower mold 120 described later, are formed on the outer circumferential surface of the main body 20 between the projections 300. [ Respectively.

2 to 6, there is shown a mold apparatus 100 for manufacturing an insert part for pulsator according to the present invention.

Referring to the drawings, a mold apparatus 100 for manufacturing an insert part for pulsator includes an upper mold 110 having a first molding groove 111 formed thereon, A second molding groove 121 for forming a cavity for molding the main body 20 together with the first molding groove 111 is formed when the upper mold 110 is molded, A lower mold 120 having a plurality of lead grooves 122 formed on an inner circumferential surface of the main body 20 so that the protrusions 300 can be formed; A core member 130 installed in the upper mold 110 to be drawn into the groove 121, an injection unit 140 injecting molten metal into the cavity, A take-out unit (150) for pressing the insert part (10) so that the insert part (10) can be taken out from the lower mold (120) The insert part 10 formed in the cavity when the upper mold 110 is separated from the lower mold 120 is prevented from being separated from the lower mold 120 together with the upper mold 110. [ (160).

A plurality of first molding grooves 111 are formed on the lower surface of the upper mold 110. The first molding grooves 111 are formed to have an inner diameter corresponding to the outer diameter of the main body 20. [ A plurality of auxiliary grooves are formed on the inner circumferential surface of the second molding groove 121 so that the protrusions 300 of the insert part 10 can be formed.

In addition, an insertion hole 113 is formed at the center of the first molding groove 111 so as to be inserted into the core member 130. The insertion port 113 is formed in a shape corresponding to the end surface of the core member 130 and is formed to be drawn in a predetermined depth upward from the ceiling surface of the first molding groove 111.

In the illustrated example, the upper mold 110 has six first molding grooves 111, but the number of the first molding grooves 111 is not limited to the shape of the insert parts 10 to be manufactured Accordingly, five or less or seven or more may be formed.

The upper mold 110 configured as described above is fixed to the upper fixing plate 114. The upper fixing plate 114 is not shown in the drawing, but is moved up and down by a driving unit. The driving unit may include a plurality of pneumatic cylinders that are installed on the upper fixing plate 114 and extend and contract in the vertical direction and operate by pneumatic pressure.

The lower mold 120 is installed on the lower fixing plate 127 at a position opposite to the upper mold 110. The lower mold 120 is formed in the second molding groove 121 on the upper surface of the upper mold 110 opposite to the first molding groove 111. The second molding groove 121 has an inner diameter corresponding to the outer diameter of the main body 20 and is formed to be pulled downward with respect to the upper surface of the lower mold 120.

The lower mold 120 is formed such that a plurality of lead grooves 122 are spaced apart from each other along the circumferential direction on the inner circumferential surface of the second molding groove 121 in order to mold the protrusions 300 of the insert parts 10 . At this time, the lead groove 122 is formed at a position opposite to the auxiliary groove of the upper mold 110, extends a predetermined length in the vertical direction, and the upper surface is opened.

On the other hand, the lower mold 120 has an injection path 123 formed on the upper surface thereof so that molten metal can be introduced into the second insertion groove. The injection path 123 is formed in the upper surface of the lower mold 120 between the second insertion grooves and has a main passage 125 with an open top and two ends communicating with the main passage 125 and each second insertion groove, And a plurality of supply passages 126 connected to the supply passages 126. At this time, one end of the main path 125 extends to the rear end edge of the lower mold 120, and is opened. The molten metal supplied from the injection unit 140 flows into each second insertion groove of the lower mold 120 through the injection path 123.

In the lower mold 120, a plurality of communication spaces communicating with the respective second molding grooves 121 are formed in the lower mold 120 so that molten metal injected into the cavity can be introduced. When the upper mold 110 is formed in the lower mold 120, the upper mold is closed by the upper mold 110. [ When a large amount of molten metal is injected into the second molding groove 121, a part of the molten metal is discharged into the communication space, so that the pressure inside the cavity is prevented from increasing.

Although not shown in the drawing, the upper mold 110 and the lower mold 120 are provided with a cooling water stage for cooling the mold before the take-out of the product molded in the cavity by supplying cooling water to the cooling passage formed at one side, And the lower mold 120 to heat the upper mold 110 and the lower mold 120 by molding and separating the upper mold 110 and the lower mold 120 and injecting molten metal It is possible to further include a heating means for maintaining the temperature at the time of heating.

The core member 130 is vertically extended by a predetermined length, and a plurality of the core members 130 are inserted into the insertion port 113 of the upper mold 110 and are lifted and lowered together with the upper mold 110. The core member 130 includes a plurality of gear forming grooves 131 spaced apart from one another in the circumferential direction so as to form a plurality of second gear teeth 22 formed in the engaging holes 21 of the insert parts 10 Respectively.

The core member 130 may be formed with a stepped portion 132 whose outer diameter is reduced at a lower end thereof so that a stepped portion can be formed on the inner surface of the lower end portion of the insert part 10. [

The injection unit 140 includes an upper sleeve 142 coupled to the upper mold 110 and a lower sleeve 141 coupled to the lower mold 120.

The lower slit 141 has a main block 143 fixed to the lower fixing plate 127 and coupled to the lower mold 120 and a protruding block 144 protruding upwardly from the upper surface of the main block 143 .

The main block 143 is disposed so as to be in contact with the rear end edge of the lower mold 120 and has an upper surface located at the same height as the upper surface of the lower mold 120. The protruding block 144 is formed to have a cross-sectional area smaller than the cross-sectional area of the main block 143 so as to be introduced into the upper sleeve 142 described later.

The lower slit 141 is formed with a communication path 145 communicating with the injection path 123 formed in the lower mold 120. The communication path 145 connects the main block 143 and the protrusion block 144 In the vertical direction. Further, it is preferable that the communication path 145 is formed so that the upper portion thereof is opened so that the molten metal supplied through the upper sleeve 142 can be easily introduced.

The upper mold 110 is installed on the upper mold 110 so that the upper mold 110 can be engaged with the lower sleeve 141 when the lower mold 120 is formed into the upper mold 120, . The molten metal injected through the injection port 146 may be introduced into the communication passage 145 through the injection port 146 to inject the molten metal into the upper mold 110. [ An inner space 147 communicating with the communication passage 145 is formed when the lower sleeve 141 is coupled to the lower sleeve 141.

The inner space 147 is communicated with the injection port 146 and the outer sleeve 142 is connected to the lower sleeve 141 by a distance greater than the cross sectional area of the protruding block 144 so that the protruding block 144 can be introduced when the upper sleeve 142 is engaged with the lower sleeve 141 It is preferable that the upper end portion of the protrusion is formed to have a large cross section and the lower portion is formed to be open.

The take-out unit 150 includes a plurality of vertically mounted vertically mounted spindles 151 on a lower fixed plate 127 and a vertically extending sprocket (not shown) reciprocating the vertically oriented spindle 151.

The mold half 151 is formed as a vertically extending round bar and slidably installed in the lower mold 120 so as to be drawn upward from the bottom of the second molding groove 121 and the communication space.

Although not shown in the drawing, the blowing-out mouth portion has a plate fixed to the lower end of the millepin 151 and an actuator installed on the plate to raise and lower the plate. The actuator is elongated and contracted in the vertical direction, and a pneumatic cylinder operated by pneumatic pressure can be applied.

When the upper mold 110 is detached from the lower mold 120 after the product is manufactured in the cavity, the takeout unit 150 moves the upper end of the spin pin 151 to the second molding groove 121 and the communication space So that the product is pressed. When the pressing force is applied to the product by the take-out unit 150, the product is taken out from the lower mold 120.

The release preventing portion 160 is formed on the inner circumferential surface of the second molding groove 121 between the lead grooves 122 so that the engaging protrusion 31 is formed in a direction away from the center of the second molding groove 121 A plurality of lead-in grooves 161 are formed so as to be drawn in a predetermined depth. The inlet grooves 161 extend in the circumferential direction of the second molding groove 121 by a predetermined length, and a plurality of the inlet grooves 161 are spaced apart from each other along the vertical direction. The insert groove 161 is formed to have a depth of 0.1 mm or less so that when the pressing force is applied to the insert part 10 produced by the rising of the spin pin 151, the protrusion 31 is deformed or crushed .

A method of manufacturing an insert part using the mold apparatus 100 for manufacturing an insert part for pulsator according to the present invention constructed as described above will be described in detail as follows.

The upper fixing plate 114 is moved downward so that the upper mold 110 and the lower mold 120 are engaged with each other so that the lower end of the core member 130 is drawn into the second molding groove 121. The molten metal is injected into the injection port 146 of the upper sleeve 142 when the upper mold 110 and the lower mold 120 are mutually combined. The molten metal injected into the upper sleeve 142 flows into the injection path 123 of the lower mold 120 through the inner space 147 of the upper sleeve 142 and the communication path 145 of the lower sleeve portion 141 do. The molten metal introduced into the injection path 123 flows into each of the second molding grooves 121 along the injection path 123 and is supplied to the cavity.

When the insert part 10 is manufactured by the upper mold 110 and the lower mold 120, the fixing plate is moved up and down to separate the upper mold 110 from the lower mold 120. At this time, The insert part 10 is constrained by the lower mold 120 and separated with the upper mold 110 by the engagement protrusion 31 formed on the outer peripheral surface of the insert part 10 by the lead- .

When the upper mold 110 is separated from the lower mold 120, the takeout unit 150 draws the upper end of the spin pin 151 from the bottom of the second molding groove 121 and the communication space upward through the take- The parts 10 are pressed upward. When the pressing force is applied to the product by the take-out unit 150, the locking protrusion 31 is deformed or crushed, and the insert part 10 is separated from the lower mold 120.

The mold apparatus 100 for manufacturing the insert part 10 for pulsator according to the present invention constructed as described above can be manufactured by die casting the insert part 10 for pulsator and the upper and lower molds 120 The products are restrained by the lower mold 120 when the molds are separated from each other, so that the product can be easily taken out.

In addition, the insert part 10 manufactured through the mold apparatus according to the present invention has a locking protrusion 31 formed on the outer circumferential surface thereof, so that it can be more firmly coupled to the pulsator during insert molding in the pulsator.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

100: Molding device for manufacturing insert parts for pulsator
110: upper mold
111: first molding groove
113:
114: upper fixed plate
120: Lower mold
121: second molding groove
122: Lead groove
127: Lower fixed plate
130: core member
131: Gear forming groove
132:
140: injection unit
141: Lower sleeve
142: upper sleeve
145:
151: Milpin
160:
161: entry home

Claims (4)

A plurality of protrusions protruding in a direction away from the main body and formed in a circumferential direction on an outer circumferential surface of the main body, the insert being insert-molded into the pulsator for a washing machine, A mold apparatus for manufacturing parts,
An upper mold having a first forming groove;
A second molding groove for forming a cavity for molding the main body together with the first molding groove is formed when the upper mold is molded, and the second molding groove is formed on the inner peripheral surface of the second molding groove, A lower mold having a plurality of lead grooves formed therein so that the protrusions can be formed;
A core member installed on the upper mold so as to be drawn into the second molding groove to form a coupling hole of the main body;
A take-out unit for pressing the insert part so that the insert part manufactured in the cavity can be taken out from the lower mold;
And a separation preventing part for preventing the insert part made in the cavity when the upper mold is separated from the lower mold from being separated from the lower mold together with the upper mold. The mold apparatus comprising:
The method according to claim 1,
The insert part is protruded from the lower mold to the outer circumferential surface of the body between the protruding projections so that the upper mold can be restrained by the lower mold when the upper mold is separated from the lower mold and when the pressing force is applied from the take- A locking protrusion that is deformed as much as possible is formed,
Wherein the release preventing portion is formed with a lead-in groove so as to be drawn in a predetermined depth in a direction away from the center of the second forming groove, on the inner circumferential surface of the second forming groove between the lead grooves for forming the latching protrusion A mold apparatus for manufacturing an insert part.
3. The method of claim 2,
Wherein the lower mold is formed with a communication space communicating with the second molding groove so as to allow molten metal injected into the cavity to flow into the cavity and having an open top, .
The method according to claim 2 or 3,
A lower sleeve coupled to the lower mold and having a communication path communicating with the injection path formed in the lower mold to inject the molten metal into the second molding groove;
The upper metal mold is installed in the upper mold so that the upper metal mold can be coupled to the lower sleeve when the lower metal mold is formed. An injection port for injecting the molten metal is formed on the upper metal mold. Further comprising: an upper sleeve having an inner space communicating with the communication passage when the lower sleeve is coupled to the communication passage so that the upper sleeve can be introduced into the communication passage.










KR1020150107457A 2015-07-29 2015-07-29 Mold apparatus for insert parts of pulsator KR101732355B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150107457A KR101732355B1 (en) 2015-07-29 2015-07-29 Mold apparatus for insert parts of pulsator

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Application Number Priority Date Filing Date Title
KR1020150107457A KR101732355B1 (en) 2015-07-29 2015-07-29 Mold apparatus for insert parts of pulsator

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KR20170014326A true KR20170014326A (en) 2017-02-08
KR101732355B1 KR101732355B1 (en) 2017-05-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101877690B1 (en) * 2017-11-07 2018-07-11 이창희 Method of casting diff cup
CN113000820A (en) * 2021-03-10 2021-06-22 昆明理工大学 Die for semi-solid aluminum alloy extrusion motor shell

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4107987B2 (en) 2003-03-17 2008-06-25 トヨタ自動車株式会社 Mold for molding and method for changing the mold
JP2005035196A (en) 2003-07-16 2005-02-10 Toyoda Gosei Co Ltd Method, mold and equipment for injection molding
JP5798776B2 (en) 2011-04-04 2015-10-21 株式会社 寿原テクノス Mold equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101877690B1 (en) * 2017-11-07 2018-07-11 이창희 Method of casting diff cup
CN113000820A (en) * 2021-03-10 2021-06-22 昆明理工大学 Die for semi-solid aluminum alloy extrusion motor shell

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