KR20120067410A - Sprue bush for injection mould - Google Patents

Sprue bush for injection mould Download PDF

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Publication number
KR20120067410A
KR20120067410A KR1020100128787A KR20100128787A KR20120067410A KR 20120067410 A KR20120067410 A KR 20120067410A KR 1020100128787 A KR1020100128787 A KR 1020100128787A KR 20100128787 A KR20100128787 A KR 20100128787A KR 20120067410 A KR20120067410 A KR 20120067410A
Authority
KR
South Korea
Prior art keywords
resin
injection
sprue bush
nozzle
inlet
Prior art date
Application number
KR1020100128787A
Other languages
Korean (ko)
Inventor
김수제
Original Assignee
주식회사 동명테크
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 동명테크 filed Critical 주식회사 동명테크
Priority to KR1020100128787A priority Critical patent/KR20120067410A/en
Publication of KR20120067410A publication Critical patent/KR20120067410A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1753—Cleaning or purging, e.g. of the injection unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/84—Safety devices
    • B29C45/844—Preventing damage caused by obstructions or foreign matter caught between mould halves during mould closing, e.g. moulded parts or runners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2725—Manifolds
    • B29C2045/2733—Inserts, plugs, bushings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled material

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

Abstract

The present invention relates to a sprue bush for injection molds used in injection molding using recycled resin, and more particularly, a foreign material catching unit having a plurality of through-holes formed in the upper part of a resin inlet formed through the sprue bush. When the injection molding using recycled resin is made, the foreign matter contained in the recycled resin is filtered out at the inlet of the resin inlet of the sprue bush, and the filtered foreign matter is easily removed without stopping the production equipment or disassembling the injection mold. This prevents clogging of manifold blocks and nozzles due to the inflow of foreign matters, thereby significantly improving productivity and preventing excessive pressure in the injection mold due to the inflow of foreign matters. To significantly extend the service life of the Injection Mold Sprue relates to the bush.

Description

Sprue bush for injection mold

The present invention relates to a sprue bush for injection molds used in injection molding using recycled resin, and more particularly, a foreign material catching unit having a plurality of through-holes formed in the upper part of a resin inlet formed through the sprue bush. When the injection molding using recycled resin is made, the foreign matter contained in the recycled resin is filtered out at the inlet of the resin inlet of the sprue bush, and the filtered foreign matter is easily removed without stopping the production equipment or disassembling the injection mold. This prevents clogging of manifold blocks and nozzles due to the inflow of foreign matters, thereby significantly improving productivity and preventing excessive pressure in the injection mold due to the inflow of foreign matters. To significantly extend the service life of the Injection Mold Sprue relates to the bush.

In general, injection molding means that a synthetic resin in the form of powder or pellets is poured into an injection cylinder equipped with a heating device, melted, and then pressed into a cavity of an injection mold using a transfer screw installed in the injection cylinder, followed by cooling and curing. As a molding product, it is widely used to mass-produce a product made of synthetic resin.

The injection molding machine used for such injection molding is equipped with an injection molding hot runner system that keeps the molten resin flowing through the resin flow path by applying heat to the resin flow portion from the injection cylinder to the mold cavity. .

In the conventional injection molding hot runner system, as shown in FIG. 1, a resin flow path is formed inside a manifold block 30 for branching a molten synthetic resin supplied from an injection cylinder into a plurality of resin flow paths 30a. An electric heater 31 for heating the periphery of 30a to a constant temperature is buried, and a nozzle is provided on the outer periphery of the nozzle 34 respectively connected to the outlet end of the resin flow passage 30a formed in the manifold block 30. The electric heater 35 which heats the peripheral part of the internal resin flow path 34a to a fixed temperature is comprised.

According to the conventional injection molding hot runner system configured as described above, the molten synthetic resin supplied from the injection cylinder is connected to the upper portion of the manifold block 30 through the resin inlet 33a of the sprue bush 33. The cavity 38 formed by the upper plate 36 and the lower plate 37 through the resin channel 30a branched inside the manifold block 30 and the resin channel 34a of each nozzle 34. During the injection, the electric heater 31 embedded in the manifold block 30 and the electric heater 35 installed on the outer periphery of the nozzle 34 are heated to a constant temperature to maintain the molten state. The generation of runners (hardening of the synthetic resin in the resin flow passage) is prevented, thus enabling continuous injection molding operations.

However, in recent years, as the price of synthetic resin materials has risen, recycled resins that have been recycled by pulverizing defective injection products or discarded injection products are used to reduce material costs. As the foreign substance 40 passes through the injection cylinder and is injected together with the resin into the injection mold, the foreign substances 40 frequently block the resin outlets of the manifold block 30 and the nozzle 34. There was a problem.

When the resin outlets of the manifold block 30 and the nozzle 34 are blocked by the foreign matter 40 contained in the recycled resin as described above, the injection mold is separated from the injection molding machine, and then the foreign matter is completely removed by disassembly and cleaning. Since the injection molding operation must be performed by reassembling, there is a problem that productivity is significantly reduced as the downtime of the production equipment increases due to unnecessary processes.

In addition, when the resin outlets of the manifold block 30 and the nozzle 34 are blocked by the foreign matter 40 contained in the recycled resin, excessive pressure is generated in the injection mold, thereby significantly reducing the life of the injection mold. There was this.

Therefore, in order to improve the productivity of injection molded products using such recycled resins in the situation where the use of recycled resins is further increased as the price of synthetic resin materials continues to increase, the conventional injection molding hot runner system as described above is used. There was an urgent need for the development of new technologies to solve the problems.

The present invention is to solve the above problems, it is configured to form a plurality of through-holes of foreign matter through the through-hole formed on the inner upper portion of the resin injection hole formed in the sprue bush regenerated water when the injection molding using the recycled resin Manifold block due to the inflow of foreign substances by allowing foreign substances contained in the ground to be filtered at the inlet of the resin inlet of the sprue bush and easily removed the filtered foreign substances without stopping the production equipment or disassembling the injection mold. As a technical task, it is possible to effectively prevent nozzle clogging and to significantly improve productivity, and to prevent excessive pressure in the injection mold due to the inflow of foreign substances, thereby significantly extending the life of the injection mold. do.

The present invention for achieving the above technical problem is formed in the center of the upper surface of the cylindrical body is formed in the nozzle contact portion which is in close contact with the end of the injection nozzle is formed in the concave shape and the diameter in the lower portion in the center of the bottom surface of the nozzle junction is wider toward the bottom In the injection mold sprue bush through which a resin injection hole is formed through and a plurality of bolt insertion holes through which a fixing bolt is inserted is formed around the nozzle joint, a foreign material locking portion having a plurality of through holes formed in the upper portion of the resin injection hole. It is formed integrally, and there is formed between the foreign matter catching portion and the upper end of the resin inlet for resin injection space to induce the resin injected from the injection machine nozzle to uniformly pass through a plurality of holes formed in the foreign matter catching portion during injection molding It features.

In the injection mold sprue bush according to the present invention configured as described above, foreign matter contained in the recycled resin during the injection molding using the recycled resin is filtered at the inlet of the resin inlet of the sprue bush, Filtered foreign substances can be easily removed without disassembling the injection mold, which effectively prevents clogging of manifold blocks and nozzles due to the inflow of foreign substances, which can greatly improve productivity, and also cause injection molds due to foreign substance inflow. There is an effect that it is possible to significantly extend the life of the injection mold by preventing excessive pressure within.

1 is an explanatory view showing a conventional injection molding hot runner system.
Figure 2 is a perspective view showing a sprue bush for injection mold according to the present invention.
Figure 3 is a cross-sectional perspective view showing the internal configuration of the sprue bush for injection mold according to the present invention.
4 is an explanatory view showing a state of use of the sprue bush for injection mold according to the present invention.

Hereinafter, the present invention for achieving the above object will be described in detail with reference to FIGS. 2 to 4.

As shown in FIGS. 2 and 4, the sprue bush for injection mold according to the present invention has a nozzle joint portion 3 in which the upper end portion of the injection molding machine nozzle is in close contact with the center of the upper surface of the cylindrical body 2. It is formed concave, the bottom portion of the nozzle joint portion 3 is formed through the resin inlet (4), the diameter is increased toward the lower portion through, and the plurality of bolt insertion inserting the fixing bolt around the nozzle joint portion 3 The hole 5 is formed through, and the foreign material catching portion 6 through which a plurality of through holes 6a are formed is integrally formed in the upper portion of the resin inlet 4, and the foreign material catching portion 6 and the resin inlet are formed. It is comprised so that the space part 7 for resin injection may be formed between the upper ends of (4).

The nozzle joining portion 3 is a concave portion formed in the center of the upper surface of the body 2, and the resin injection hole of the sprue bush 1 at the end of the injection nozzle to inject the resin into the injection mold during injection molding. In case of contact with the inlet of 4), the end of the injection machine nozzle should be in close contact with the inlet of the resin inlet 4 of the sprue bush 1 over a larger area. The gap between (4) prevents the resin from flowing backward.

The foreign material catching portion 6 is integrally formed on the inner upper portion of the resin inlet 4, and when the injection molding using the recycled resin, the foreign material 40 contained in the regeneration resin is formed at the inlet of the resin inlet 4. By filtering, the foreign matter 40 contained in the recycled resin is prevented from being introduced into the injection mold together with the resin to effectively block the clogging of the manifold block 30 and the nozzle 34 due to the inflow of the foreign matter 40. It can be prevented.

In addition, the plurality of through holes 6a formed through the foreign material catching part 6 are formed to form concentric circles around the through holes located in the center portion, the number of which is the diameter of the resin inlet 4, and each of the through holes 6a. In consideration of the diameter, resistance when injecting the resin, etc., it is preferable to form up to about eight.

In addition, the diameter of each through hole (6a) that is formed through the foreign material catching portion 6 is the resin outlet of the nozzle 34 connected to the outlet end of the manifold block 30 is the foreign material 40 injected with the recycled resin It is formed smaller than the resin outlet diameter of the nozzle 34 so as not to be caught, for example, when the diameter of the resin outlet of the nozzle 34 is 3mm, the diameter of each through hole 6a is formed to 2mm, the resin of the nozzle 34 When the outlet diameter is 4mm, the diameter of each through hole 6a is preferably formed to 3mm.

The resin injection space 7 is a portion formed between the foreign matter catching portion 6 and the upper end of the resin inlet 4, and resin injected from the injection machine nozzle during injection molding is formed in the foreign matter catching portion 6. This leads to uniformly passing through the plurality of through holes 6a.

As such, when the resin injection space 7 is formed between the foreign material catching portion 6 and the upper end of the resin injection hole 4, the resin injected from the injection machine nozzle during injection molding is first spaced for resin injection 7. Is injected into and subsequently passes through a plurality of through holes 6a formed in the foreign matter catching portion 6 so that the resin injected from the injection machine nozzle may uniformly pass through the plurality of through holes 6a formed in the foreign matter catching portion 6. If the space for the resin injection 7 is not formed between the foreign matter catching portion 6 and the upper end of the resin inlet 4, the resin injected from the injection machine nozzle is applied to the foreign matter catching portion 6. Since the through-hole located in the center of the plurality of through-holes (6a) is formed to pass directly through the difference in the diameter of the injection nozzle and the through-hole injection pressure is increased as well as the foreign matter 40 contained in the regenerative resin foreign material caught portion (6) On A phenomenon in which the resin inlet 4 of the sprue bush 1 is clogged may be caught by the formed through hole 6a.

In addition, the foreign material 40 filtered by the foreign material catching part 6 is retained in the resin injection space part 7 when the injection molding using the recycled resin is carried out. Thus, the foreign material filtered by the foreign material catching part 6 is soup. As the resin stays in the resin injection space 7 formed at the inlet portion of the resin inlet 4 of the roux bush 1, the resin is retracted without stopping the production equipment or disassembling the injection mold. The foreign matter 40 collected in the injection space 7 can be easily removed.

Referring to the installation and working relationship of the injection mold sprue bush according to the present invention configured as described above are as follows.

As shown in FIG. 4, the sprue bush for injection mold according to the present invention is seated on the upper end of the resin inlet end of the manifold block 30 in the same manner as a conventional injection mold sprue bush, and then around the nozzle joint 3. The fastening bolt is inserted into the formed bolt insertion hole 5 to be easily installed.

The sprue bush 1 for injection mold according to the present invention is installed on the upper end of the resin inlet end of the manifold block 30, and then the upper end of the sprue bush 1 at the end of the injection machine nozzle during injection molding using recycled resin. When the recycled resin is injected into the injection mold through the resin inlet 4 of the sprue bush 1 while being in close contact with the nozzle joint 3 formed in the concave, the recycled resin sprayed from the injection machine nozzle is first foreign matter. It is injected into the resin injection space 7 formed in the upper portion of the catching portion 6 and then passes through a plurality of through holes 6a formed through the foreign matter catching portion 6, wherein the foreign matter 40 contained in the recycled resin 40 ) Is filtered by the foreign matter catching part (6).

When the foreign matter 40 contained in the recycled resin is filtered by the foreign matter catching portion 6 formed integrally with the upper inside of the resin inlet 4 of the sprue bush 1 during injection molding using the recycled resin as described above, Since the foreign matter 40 contained in the recycled resin is not introduced into the injection mold together with the resin, the resin outlet of the manifold block 30 and the nozzle 34 is blocked by the foreign matter 40 contained in the recycled resin. The phenomenon can be completely prevented.

In addition, the foreign matter 40 filtered by the foreign matter catching portion 6 during the injection molding using the recycled resin stays in the resin injection space 7 formed at the inlet of the resin inlet 4 of the sprue bush 1. By doing so, it is possible to easily remove the foreign matter 40 collected in the resin injection space 7 in the state of retracting the injection machine nozzle without discontinuing operation of the production equipment or disassembling the injection mold.

The sprue bush for injection mold according to the present invention configured as described above is the foreign matter 40 contained in the recycled resin during the injection molding using the recycled resin is filtered at the inlet portion of the resin inlet 4 at the same time the operation of the production equipment As it is possible to easily remove the filtered foreign matter 40 without interruption or disassembly of the injection mold, it is possible to effectively prevent clogging of the manifold block 30 and the nozzle 34 due to the inflow of the foreign matter 40, thereby improving productivity. Not only can be greatly improved, it is possible to prevent excessive pressure in the injection mold due to the inflow of the foreign material 40 to significantly extend the life of the injection mold.

1: sprue bush
2: body
3: nozzle joint
4: resin inlet
5: bolt insertion hole
6: foreign material catching part
6a: through-hole
7: space for resin injection

Claims (1)

The upper surface of the cylindrical body (2) is formed in the concave nozzle junction portion (3) which is in close contact with the end of the injection molding machine nozzle during the injection molding, the resin in the center of the bottom surface of the nozzle junction (3) is wider toward the bottom In the injection molding sprue bush in which the injection hole 4 is formed through and the plurality of bolt insertion holes 5 through which the fixing bolt is inserted are formed around the nozzle joint 3.
In the upper portion of the resin inlet 4, the foreign matter catching portion 6 through which a plurality of through holes 6a are formed is integrally formed.
Between the foreign material catching part 6 and the upper end of the resin inlet 4, the resin injected from the injection machine nozzle during injection molding causes the resin to uniformly pass through the plurality of through holes 6a formed in the foreign material catching part 6. Sprue bush for injection mold, characterized in that the space for injection (7) is formed.
KR1020100128787A 2010-12-16 2010-12-16 Sprue bush for injection mould KR20120067410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100128787A KR20120067410A (en) 2010-12-16 2010-12-16 Sprue bush for injection mould

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100128787A KR20120067410A (en) 2010-12-16 2010-12-16 Sprue bush for injection mould

Publications (1)

Publication Number Publication Date
KR20120067410A true KR20120067410A (en) 2012-06-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100128787A KR20120067410A (en) 2010-12-16 2010-12-16 Sprue bush for injection mould

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106346702A (en) * 2015-07-20 2017-01-25 唐健丽 Hot runner mould system provided with filtering devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106346702A (en) * 2015-07-20 2017-01-25 唐健丽 Hot runner mould system provided with filtering devices

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J301 Trial decision

Free format text: TRIAL DECISION FOR APPEAL AGAINST DECISION TO DECLINE REFUSAL REQUESTED 20130308

Effective date: 20131018