WO1999000239A1 - Mold clamping device - Google Patents
Mold clamping device Download PDFInfo
- Publication number
- WO1999000239A1 WO1999000239A1 PCT/KR1997/000126 KR9700126W WO9900239A1 WO 1999000239 A1 WO1999000239 A1 WO 1999000239A1 KR 9700126 W KR9700126 W KR 9700126W WO 9900239 A1 WO9900239 A1 WO 9900239A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- template
- tie bars
- stationary
- supporting plate
- mold clamping
- Prior art date
Links
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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
- B29C45/6707—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement
Definitions
- the present invention relates to a mold clamping device and more
- the booster ram type mold clamping device based on the conventional
- said movable template being able to reciprocate by the booster cylinders 5
- Figure 1 shows a mold clamping device based on the conventional
- movable mold 7 may be brought into firm contact with the stationary mold
- the tie bars 1 pull the movable template 6 or the movable
- the conventional injection molding machine which is operated as
- the mold clamping device of the above mentioned injection molding machine should be, on its stationry template, provided with a
- the present invention is intended to address the problems and the
- a mold clamping device which comprises a supporting plate
- a stationary template for retaining a stationary
- tie bars consist of tie bar
- Figure 1 shows, in cross section, a side view of a mold clamping
- Figure 2 shows, in cross section, a side view of a mold clamping
- present invention is substantially composed of a supporting plate 12, a
- stationary template 14 including a stationary mold 16 and mold clamping
- a movable template 17 including a
- stationary template 14 for retaining the stationary mold 16, which stationary template encloses the mold clamping cylinders 13, 13 in its upper and its
- pluralitural tie bars 13 are arranged horizontally and parallelly to
- the booster cylinders 18, 18 are connected to a movable template 17
- tie bars 11 are connected to the corresponding half nut cylinders 22 and brought into contact with other side of the movable
- Figure 2 shows a mold clamping device according to an embodiment of
- the tie bars eliminates the necessity of the tunining circuit of the
- the half nuts 19 may be replaced by other appropriate fastening blocks
- the molding raw material is received in through injection from a separate heating cylinder (not shown)
- strokes are provided to correspond to all possible small or large
- booster rams or cylinders which move the movable template at a high
- longitudinal length of the mold clamping device can be reduced as short
Abstract
The present invention is directed to a mold clamping device which can produce a mold clamping force under high pressure and which comprises a supporting plate (12) for supporting the tie bars (11), a stationary template (14), said stationary template (14) being provided with the mold clamping cylinders (13) on its upper and its lower portion, plural tie bars (11) arranged horizontally between said supporting plate (12) and said stationary template (14), a movable template (17) arranged vertically between said supporting plate (12) and said stationary template (14), booster cylinders (18) fixed on the top and the bottom side of said stationary template (14) respectively and connected to said movable template (17) through piston rods and half nuts (19) connected to the corresponding half nut cylinders (22) and intended to be contacted to one side of the movable template (17) at its upper and its lower portion, said half nuts (19) being threadedly combined wiht the tie bars (11), wherein adjusting means for fine adjustment of the positions of the tie bars (11) are disposed on said slidingly supporting plate (12).
Description
MOLD CLAMPING DEVICE
TECHNICAL FIELD
The present invention relates to a mold clamping device and more
particularly to a device for clamping a metal mold which has a reduced
total length and facilitates fine adjustment of the position of the tie bars
by virtue of separate or divided arrangements of the booster rams which
move the movable template at a high speed.
BACKGROUND OF THE INVENTION
Generally, in the case of a mold clamping device based on hydraulic
mechanical clamping method, which is used for injection molding, there are
employed a large sized cylinder for raising the pressure and a booster
cylinder for opening and closing the molds.
The booster ram type mold clamping device based on the conventional
hydraulic mechanical clamping method, as used for the above mentioned
purpose, comprises, as shown in Figure 1, a movable and a stationary
template 6, 2 arranged vertically on the left and the right side, plural tie
bars 1 on the upper and lower side, said tie bars being arranged
horizontally between the movable and the stationary template 6, 2, said
stationary template 2 having the respective one ends of the tie bars 1
inserted on its upper and lower part and having a stationary mold 3
attached on its one side, the booster cylinders 5, 5 each being fixed on
the top and bottom side of the stationary template, said movable template
6 having the respective one ends of the tie bars 1 horizontally inserted on
its upper and lower part and having a movable mold 7 on its one side,
said movable template being able to reciprocate by the booster cylinders 5
under the guidance of the tie bars 1, and the half nuts 10 connected to
the half nut cylinders 8, 9 to be attached to the movable template 6 in
order to make connection or disconnection between the tie bars 1 and the
movable template 6.
The conventional mold clamping device of the above described
construction is operated as follows.
Figure 1 shows a mold clamping device based on the conventional
hydraulic mechanical method, wherein the metal molds are in an open
state.
In operation of the conventional mold clamping device, as can be seen
from Figure 1, the movable template 6 is first moved toward the stationary
template 2 with the actuation of the booster cylinders 5, so that the
movable mold 7 may be brought into firm contact with the stationary mold
3. Subsequently, as the half nuts 10 are caused to contact the side of the
movable template 6 and the half nut cylinders 8 are actuated, the half nuts
10 are engaged with the tie bars 1 between the threaded portions of the
half nuts 10 and the tie bar 1. Finally, when a high pressure oil is filled in
the cylinder 2a, the tie bars 1 pull the movable template 6 or the movable
mold 7, achieving a firm clamping of the metal molds under a total
pressure in a state of maintained clamping force.
The conventional injection molding machine, which is operated as
mentioned above, has however the disadvantages that the large sized
cylinder should be provided at a high manufacturing cost, the clamping
device is increased in its total length to accommodate such a large
cylinder, and a large quantity of working oil is required to run that large
cylinder with the resultant excessive operating cost.
Furthermore, in the case of such a conventional injection molding
machine, because the adjusting device for adjusting the thickness of the
pair of molds depending on the desired products was executed within the
mold clamping cylinder, the total length of the mold clamping cylinder
becomes so large that its manufacture tends to be difficult, demanding a
narrowed space for the ejecting section of the mold clamping device, with
the result that the application of the conventional mold clamping devices
was associated with a low efficiency.
In addition, the mold clamping device of the above mentioned injection
molding machine should be, on its stationry template, provided with a
multitude of hydraulic cylinders 2a for pulling the movable template 6
toward the stationary template 2 along the guidance of the tie bars 1 for
the purpose of maintaining the mold clamping force, causing the increased
complexity in production of the clamping device and the accordingly
increased production cost.
SUMMARY OF THE INVENTION
The present invention is intended to address the problems and the
disadvantages connected with the above described mold clamping device of
the conventional type and so has the object of providing a mold clamping
device which can produce a mold clamping force under high pressure at a
reduced quantity of hydraulic oil by shortening the total length of the mold
clamping device and decreasing the consumption of the hydraulic oil
through the shortened working stroke.
The above described object is achieved according to the present
invention by a mold clamping device which comprises a supporting plate
for supporting the tie bars, a stationary template for retaining a stationary
metal mold, said stationary template being provided with the mold
clamping cylinders on its upper and its lower recessed portion, said
supporting plate and said stationary template being arranged longitudinally
at both terminal sides, plural tie bars arranged transversely in parallel
manner between said supporting plate and said stationary template, with
the respective one ends of said tie bars piercing the supporting plate on
its upper and its lower side and with the respective other ends of said tie
bars piercing said stationary template on its upper and its lower side to be
securedly connected with pistons inside the mold clamping cylinders, a
movable template for retaining a movable mold arranged longitudinally
between said supporting plate and said stationary template, said movable
template being provided with a movable mold on its one face, said tie
bars piercing said movable template on its upper and its lower side,
booster cylinders fixed on the top and the bottom side of said stationary
template respectively and connected to said movable template through
piston rods to pull said movable template, said stationary template being
attached with said stationary mold on its one face, and half nuts connected
to the corresponding half nut cylinders and intended to be contacted to
one side of the movable template at its upper and its lower portion, said
half nuts being threadedly combined with the tie bars, wherein adjusting
means for fine adjustment of the positions of the tie bars are disposed on
said slidingly supporting plate.
The above described adjusting means, which are mounted respectively
on the upper and the lower portion of the slidingly supporting plate to
adjust fine adjustment of the positions of the tie bars, consist of tie bar
nuts for fixing the tie bars on one side of the supporting plate and position
sensors mounted on the supporting plate to measure the moved distances
of the tie bars.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows, in cross section, a side view of a mold clamping
device according to the conventional art, and
Figure 2 shows, in cross section, a side view of a mold clamping
device according to an embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
A preferable embodiment of the present invention will be described
below with reference to the attached drawing.
As seen from Figure 2, the mold clamping device according to the
present invention is substantially composed of a supporting plate 12, a
stationary template 14 including a stationary mold 16 and mold clamping
cylinders 13, 13, plural tie bars 11, a movable template 17 including a
movable mold 15, booster cylinders 18, 18 and half nuts 19 with half nut
cylinders 20. The supporting plate 12 for supporting tie bars 11 and the
stationary template 14 for retaining the stationary mold 16, which stationary
template encloses the mold clamping cylinders 13, 13 in its upper and its
lower recessed portion respectively are arranged vertically at the both
terminal sides. Plural tie bars 13 are arranged horizontally and parallelly to
each other at an upper and a lower location between the supporting plate
12 and the stationary template 14. The respective one ends of the tie bars
11 pierce or are inserted through the supporting plate 12 on the upper part
and the lower part of the supporting plate respectively. Similarly, the
respective other ends of the tie bars 11 are inserted through the stationary
template 14 on its upper and its lower part and securedly connected with
pistons inside the mold clamping cylinders 13. The movable template 17 for
retaining the movable mold 15 are arranged vertically between the
supporting plate 12 and the stationary template 14. The movable template
17 are provided with the movable mold 15 on its one face and the tie
bars 11 are inserted through the movable template 17 on its upper and its
lower part. The booster cylinders 18, 18 for pulling the movable template
17 are fixed on the top and the bottom side of the stationary template 14
respectively which is attached with a stationary mold 16 on its one face.
The booster cylinders 18, 18 are connected to a movable template 17
through piston rods. The half nuts 19 which are intended to be threadedly
combined with tie bars 11 are connected to the corresponding half nut
cylinders 22 and brought into contact with other side of the movable
template 17 on its upper and its lower portion respectively. Particularly,
adjusting means for fine adjustment of the horizontal position of the tie
bars 11 are disposed on the slidingly supporting plate 12.
The above described adjusting means, which are mounted respectively
on the upper and the lower portion of the slidingly supporting plate 12 to
adjust fine adjustment of the positions of the tie bars 11, consist of tie bar
nuts 20 for fixing the tie bars 11 on one side of the supporting plate 12
and position sensors mounted on the supporting plate 12 to measure the
moved distances of the tie bars 11.
Figure 2 shows a mold clamping device according to an embodiment of
the invention in its open state. Its operation is described below.
In a state that the half nuts 19 are not in threaded engagement with
tie bars 11, the movable template 17 is moved toward the stationary
template 14 under the guidance of the tie bars 11 by actuating the booster
cylinders 18, 18 until the movable mold 15 is firmly contacted with the
stationary mold 16 into a closed pair of metal molds. Thereafter, when the
hydraulic oil with low pressure is filled through the ports A of the mold
clamping cylinders 13, the tie bars 11 sliding through the supporting plate
12 are slided in conjunction with a position sensor (not shown) up to the
position as inputted in a monitor to adjust the clamping position of the half
nuts 19 on the tie bars 11 ( The combination of the supporting plate with
the tie bars eliminates the necessity of the tunining circuit of the
conventional art.)
In such a state, the half nuts which are contacted with the other side
of the movable template 17 to back it up are engaged with the threaded
portion of the tie bars 11 by actuating the half nut cylinders 22 to thereby
realize mutual clamping. Next, when the high pressure hydraulic oil is filled
through the ports A of the mold clamping cylinders 13 in the upper and
lower recessed portions of the stationary template 14 through which one
ends of the tie bars 11 are inserted, the interiors of the mold clamping
cylinders 13 are subjected to a raised pressure so that the tie bars 11 can
pull the movable template 17 or specifically the movable mold 15 to
contact the stationary mold 16 tightly, resulting in firm clamping of the
metal molds under the maintained high pressure clamping force. The
symbol B stands for the other hydraulic oil port.
The half nuts 19 may be replaced by other appropriate fastening blocks
as the case may be.
In this circumstance that the interiors of the mold clamping cylinders 13
are maintained under maximum high pressure, the molding raw material is
received in through injection from a separate heating cylinder (not shown)
so as to produce the product through molding and then the product is
withdrawn through a separate cylinder attached to the movable template 17
to thereby complete the molding process.
The disadvantage of the large total length of the mold clamping device
based on hydraulic mechanical method according to a prior art wherein
strokes are provided to correspond to all possible small or large
thicknesses of the metal molds is eliminated in case of the mold clamping
device 13 so constructed and so operated as described above according
to the present invention wherein the mold clamping cylinders are dividedly
arranged and so are short. The reduction of the total length of the mold
clamping device is also assisted by the divided arrangements of the
booster rams or cylinders which move the movable template at a high
speed, the divided arrangements contributing to the simplification of the
function to adjust the position of the tie bars precisely.
Furthermore, as long as a minimum length of the mold clamping
cylinder depending on the pressure raising capacity is assured, the entire
longitudinal length of the mold clamping device can be reduced as short
as possibe. Thus, not only the manufacturing cost can be reduced due to
the elimination of the large sized mold clamping device, but also the
operating cost can be reduced due to the smaller mold clamping cylinder.
And the manufacturing cost is further reduced by the simplified function of
fine adjusting the position of the tie bars.
The attached claims are simply based on an embodiment of the
present invention. Accordingly, a variety of modifications and alterations
may be made somewhat beyond those claims, with reference to the
construction and means as described above, only within the spirit of the
present invention, and those would also be deemed as falling within the
category of the present invention.
Claims
1. A mold clamping device which comprises a supporting plate 12 for
supporting the tie bars 11, a stationary template 14 for retaining a
stationary metal mold 16, said stationary template 14 being provided with
the mold clamping cylinders 13, 13 in its upper and its lower recessed
portion, said supporting plate 12 and said stationary template 14 being
arranged longitudinally(vertically) at both terminal sides, plural tie bars 11
arranged transversely(horizontally) in a parallel manner between said
supporting plate 12 and said stationary template 14, with the respective
one ends of said tie bars 11 piercing the supporting plate 12 on its upper
and its lower portion and with the respective other ends of said tie bars
11 piercing said stationary template 14 on its upper and its lower portion
to be securedly connected with pistons inside the mold clamping cylinders
13, 13, a movable template 17 for retaining a movable mold 15 arranged
longitudinally(vertically) between said supporting plate 12 and said stationary
template 14, said movable template 17 being provided with a movable
mold 15 on its one face, said tie bars 11 piercing said movable template
17 on its upper and its lower portion, booster cylinders 18, 18 fixed on the
top and the bottom side of said stationary template 14 respectively and
connected to said movable template 17 through piston rods to pull said movable template 17, said stationary template 14 being attached with said
stationary mold 16 on its one face, and half nuts 19 connected to the
corresponding half nut cylinders 22 and intended to be contacted to other
side of the movable template 17 at its upper and its lower portion, said
half nuts 19 being threadedly combined with the tie bars 11, wherein
adjusting means for fine adjustment of the positions of the tie bars 11 are
disposed on said slidingly supporting plate 12.
2. A mold clamping device according to Claim 1, wherein said adjusting
means for fine adjustment of the tie bars 1 1 , which adjusting means are
disposed on the upper and the lower portion of the supporting plate 12
respectively, comprise tie bar nuts 20, and the tie bars 11 are fixed by
said tie bar nuts 20 on the other side of the slidingly supporting plate 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/KR1997/000126 WO1999000239A1 (en) | 1997-06-26 | 1997-06-26 | Mold clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/KR1997/000126 WO1999000239A1 (en) | 1997-06-26 | 1997-06-26 | Mold clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999000239A1 true WO1999000239A1 (en) | 1999-01-07 |
Family
ID=19494143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR1997/000126 WO1999000239A1 (en) | 1997-06-26 | 1997-06-26 | Mold clamping device |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1999000239A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000993A (en) * | 2019-03-29 | 2019-07-12 | 秦皇岛方华埃西姆机械有限公司 | A kind of device connecing the medium-sized intracavitary portion's integrated flexure of angle mold |
| CN117189952A (en) * | 2023-10-23 | 2023-12-08 | 西南石油大学 | Soil protection device for petroleum pipeline leakage |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4029457A (en) * | 1974-06-17 | 1977-06-14 | Toshiba Kikai Kabushiki Kaisha | Molding machine |
| US5066217A (en) * | 1990-08-08 | 1991-11-19 | Ube Industries, Ltd. | Clamping apparatus for an injection molding machine |
| DE4230824A1 (en) * | 1991-09-16 | 1993-03-18 | Romi Ind | HYDROMECHANICAL MOLDING LOCKING MECHANISM |
| US5320517A (en) * | 1990-07-27 | 1994-06-14 | Nissei Jushi Kogyo Kabushiki Kaisha | Clamping apparatus for molding machine |
-
1997
- 1997-06-26 WO PCT/KR1997/000126 patent/WO1999000239A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4029457A (en) * | 1974-06-17 | 1977-06-14 | Toshiba Kikai Kabushiki Kaisha | Molding machine |
| US5320517A (en) * | 1990-07-27 | 1994-06-14 | Nissei Jushi Kogyo Kabushiki Kaisha | Clamping apparatus for molding machine |
| US5066217A (en) * | 1990-08-08 | 1991-11-19 | Ube Industries, Ltd. | Clamping apparatus for an injection molding machine |
| DE4230824A1 (en) * | 1991-09-16 | 1993-03-18 | Romi Ind | HYDROMECHANICAL MOLDING LOCKING MECHANISM |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000993A (en) * | 2019-03-29 | 2019-07-12 | 秦皇岛方华埃西姆机械有限公司 | A kind of device connecing the medium-sized intracavitary portion's integrated flexure of angle mold |
| CN110000993B (en) * | 2019-03-29 | 2024-03-08 | 方华智能装备(秦皇岛)股份有限公司 | Device for integrating and bending inside cavity in corner connecting die |
| CN117189952A (en) * | 2023-10-23 | 2023-12-08 | 西南石油大学 | Soil protection device for petroleum pipeline leakage |
| CN117189952B (en) * | 2023-10-23 | 2024-02-13 | 西南石油大学 | Soil protection device for petroleum pipeline leakage |
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