CN102046352A

CN102046352A - Mold clamping device

Info

Publication number: CN102046352A
Application number: CN2008801294310A
Authority: CN
Inventors: 冈田则人; 田村惇朗
Original assignee: Sumitomo Heavy Industries Ltd
Current assignee: Sumitomo Heavy Industries Ltd
Priority date: 2008-05-26
Filing date: 2008-05-26
Publication date: 2011-05-04
Anticipated expiration: 2028-05-26
Also published as: DE112008003892T5; WO2009144777A1; CN102046352B

Abstract

A mold clamping device comprises a first platen on which one of a pair of metallic molds is fixed, a second platen on which the other of the pair of metallic molds is fixed and which can move in a mold open-close direction, and a rod which is fixed on the second platen and which transmits mold clamping force to the second platen from a side opposite to the first platen. The rod has a hollow structure. A ball screw mechanism for an ejector of a molded component is arranged in a hollow portion formed by the hollow structure. Thus, the mold clamping device capable of appropriately preventing the scattering of a lubricant which is for use in an ejector device is provided.

Description

Mold closing mechanism

Technical field

The present invention relates to a kind of mold closing mechanism.

Background technology

In the past, injection (mo(u)lding) machine constituted, and filled (interpolation) to the cavity space cover half and the dynamic model from the injection nozzle injecting resin of injection device, and made it to solidify and obtain the moulding product.And, carry out mold closing, matched moulds and die sinking and set mold closing mechanism (for example, patent documentation 1) for dynamic model is moved with respect to cover half.

Yet possessing on the mold closing mechanism has liftout attachment.Liftout attachment is the device that is used for from the moulding product of mould dismounting curing.Usually, liftout attachment constitutes, and ejects the moulding product by the rear knock-pin (knock-pin) from dynamic model.It is mobile that the driving of this knock-pin by motor advance and retreat the ball-screw rotation.

Patent documentation 1: the international brochure that discloses No. 06/118083

But liftout attachment in the past sets to be exposed to outside state.Fig. 1 is the figure that sets example that represents liftout attachment in the past.The mold closing mechanism 500 of Fig. 1 is the mold closing mechanisms that obtain the type of mold clamping force by toggle mechanism.Among Fig. 1,501 expression dynamic models, 502 expression cover half, 503 expression toggle mechanisms, 504 expression liftout attachments.As shown in Figure 1, liftout attachment 504 sets to be exposed to outside state.

When liftout attachment set to be exposed to outside state, there are the following problems: because of being used to make the rotation of the mobile ball-screw of knock-pin advance and retreat cause the lubricant of this ball-screw to splash towards periphery, pollute the mold closing mechanism periphery.Therefore, the countermeasure of cover etc. need be set around liftout attachment in the past.

Summary of the invention

The present invention puts in view of the above problems and finishes, and its purpose is, a kind of mold closing mechanism that splashes that can suitably prevent to be used in the lubricant of liftout attachment is provided.

Therefore, in order to solve above-mentioned problem, the invention is characterized in, possess: the 1st pressing plate is fixed with a side of a pair of mould; The 2nd pressing plate is fixed with the opposing party of described a pair of mould, and can moves to die opening and closing direction advance and retreat; And bar, be fixed on described the 2nd pressing plate, and make mold clamping force from the opposition side of described the 1st pressing plate to described the 2nd pressing plate transmission, wherein, described bar is a hollow structure, sets ejecting of moulding product at the hollow bulb that is formed by described hollow structure and uses ball screw framework.

And, the invention is characterized in that described ejecting with ball screw framework comprises lead screw shaft and nut, the screw part of described lead screw shaft and nut is submerged in the lubricant.

And, the invention is characterized in that described hollow bulb comprises the 1st space that sets described ball screw framework, described the 1st space is only by being used to supply with or discharge the hole and the binding of other spaces of described lubriation material.

And, the invention is characterized in that described the 1st space is spaced by the bearing that supports described lead screw shaft.

And, the invention is characterized in, be equipped with encapsulant on the described bearing.

And, the invention is characterized in that described bearing separates following two spaces, promptly link described lead screw shaft and the space and described the 1st space that are used to make described lead screw shaft drive shaft rotating.

And, the invention is characterized in, on described nut, be fixed for transmitting the straight-line transferring elements of this nut, be formed for guide hole that described transferring elements is run through in described the 1st space, between described transferring elements and described guide hole, set encapsulant.

The invention effect

According to the present invention, can provide a kind of mold closing mechanism that splashes that can suitably prevent to be used for the lubricant of liftout attachment.

Description of drawings

Fig. 1 is the figure that sets example that represents liftout attachment in the past.

Fig. 2 is the die device of expression in the embodiments of the present invention and the side view of the state the during mold closing of mold closing mechanism.

Fig. 3 is the die device of expression in the embodiments of the present invention and the side view of the state the during die sinking of mold closing mechanism.

Fig. 4 is the stereogram of internal structure that is used for illustrating the liftout attachment of embodiments of the present invention.

Fig. 5 is the stereogram of internal structure that is used for illustrating the liftout attachment of embodiments of the present invention.

Fig. 6 is the cutaway view of internal structure that is used for illustrating the liftout attachment of embodiments of the present invention.

Fig. 7 is the cutaway view of internal structure that is used for illustrating the liftout attachment of embodiments of the present invention.

Fig. 8 is the stereogram of the outward appearance of the liftout attachment in the expression embodiments of the present invention.

Fig. 9 is that the 1st of expression oil sealing is arranged the figure of example.

Figure 10 is the figure that the 2nd of expression oil sealing sets example.

Figure 11 is the figure that set example of expression liftout attachment to mold closing mechanism.

Figure 12 is the figure that set example of expression liftout attachment to mold closing mechanism.

Figure 13 is equipped with the side view of the electronic direct pressure device of the liftout attachment in the embodiments of the present invention.

The specific embodiment

With reference to accompanying drawing embodiments of the present invention are described.At first, with reference to Fig. 2 and Fig. 3 the mold closing mechanism of using injection (mo(u)lding) machine of the present invention is described.Fig. 2 is the die device of expression in the embodiments of the present invention and the side view of the state the during mold closing of mold closing mechanism.Fig. 3 is the die device of expression in the embodiments of the present invention and the side view of the state the during die sinking of mold closing mechanism.

Fig. 2 and mold closing mechanism 10 shown in Figure 3 are supported on the guide rail Gd that is made of 2 tracks on the framework Fr that is arranged on injection (mo(u)lding) machine.Fixation clip 11 mountings are fixed with respect to framework Fr and guide rail Gd on guide rail Gd.With fixation clip 11 across predetermined space, and opposed and set rear fender 13 with fixation clip 11.Between fixation clip 11 and rear fender 13, set up 4 connecting rods 14 (only illustrating 2 among the figure) as linking part spare.But dynamic pressure plate 12 is setting to the die opening and closing direction with fixation clip 11 opposed state lower edge connecting rods 14 (among the figure direction move freely) to the left and right free to advance or retreat.For this reason, but form the guide hole (not shown) that connecting rods 14 are run through at dynamic pressure plate 12.

In addition, in this manual, with the die opening and closing direction, but soon the moving direction of dynamic pressure plate 12 is called horizontal direction, but the direction vertical with the moving direction of dynamic pressure plate 12 is called vertical direction.

Leading section (being the right part among the figure) at connecting rod 14 forms the 1st threaded portion (not shown), and connecting rod 14 is by being screwed together in the 1st threaded portion and fastening being secured on the fixation clip 11 with nut n1.Rearward end (being the left part among the figure) at each connecting rod 14 forms the guide pillar 21 of external diameter less than connecting rod 14.Guide pillar 21 is given prominence to towards the rear from the rear end face (being the left side the figure) of rear fender 13 and is extended.Form the 2nd threaded portion (not shown) near rear end face each guide pillar 21, rear fender 13, fixation clip 11 and rear fender 13 are fastening by nut n2 is screwed together in the 2nd threaded portion to fix.Though guide pillar 21 and connecting rod 14 is integrally formed, also can form guide pillar 21 with connecting rod 14 splits ground.

Fixing cover half 15 on the fixation clip 11, but and on dynamic pressure plate 12 fixing dynamic model 16.Constitute die device 19 by cover half 15 and dynamic model 16.But the advance and retreat by dynamic pressure plate 12 make dynamic model 16 move with respect to cover half 15, and carry out mold closing, matched moulds and die sinking.In addition, if carry out matched moulds, then form cavity space between cover half 15 and dynamic model 16, the resin of injecting from the injection nozzle 18 of injection device 17 as moulding material is filled into cavity space.

But more setting and the dynamic pressure plate 12 parallel adsorption plates 22 that set along each guide pillar 21, and by guide pillar 21 channeling conducts free to advance or retreatly as magnetic by the rear than rear fender 13.In addition, on adsorption plate 22, the position corresponding with each guide pillar 21 forms the guide hole 23 that guide pillar 21 is run through.Guide hole 23 comprises end face (being the right side among the figure) large-diameter portion 24 of opening and the minor diameter 25 that links to each other therewith forward.Large-diameter portion 24 is held nut n2.Minor diameter 25 has the sliding surface that guide pillar 21 slides to the rear end face opening of adsorption plate 22.Move for but dynamic pressure plate 12 is advanced and retreat, but between adsorption plate 22 that is linked to dynamic pressure plate 12 and framework Fr, set linear motor 28 as the die opening and closing drive division.Linear motor 28 possesses: stator 29, dispose abreast and with the moving range of adsorption plate 22 accordingly with guide rail Gd on framework Fr; Mover 31 is fixed on the sliding bottom Sb that the lower end of adsorption plate 22 is fixed, and opposed and form at preset range with stator 29.Sliding bottom Sb on guide rail Gd, and supports mover 31 along stator 29 at its two-side supporting as shown in Figure 3 movably.Sliding bottom Sb covers the top of mover 31 and extends to the bearing of trend of guide rail Gd.For this reason, in rear fender 13 lower ends, the 13a of foot in the space 81 that formation guiderail base Gb and sliding bottom Sb are passed through is arranged at both sides.

When the stroke that the length that the length of the stator 29 of linear motor 28 is made as Lp, mover 31 is made as Lm, adsorption plate 22 (but dynamic pressure plate 12) is made as Lst, length L m with set accordingly based on the maximum propulsive force of linear motor 28.And length L p sets the relation that satisfies Lp＞Lm+Lst for.

Mover 31 possesses: magnetic core 34, and outstanding and form a plurality of magnetic pole tooths 33 towards stator 29 with preset space length; Coil 35, package is in each magnetic pole tooth 33.In addition, but magnetic pole tooth 33 to forming in parallel to each other with respect to the rectangular direction of the moving direction of dynamic pressure plate 12.Stator 29 possesses magnetic core and extends and the permanent magnet (not shown) of formation on magnetic core.Permanent magnet each magnetic pole by making the N utmost point and the S utmost point alternately and with the spacing magnetization identical with magnetic pole tooth 33 forms.

Therefore, if supply with predetermined current and drive linear motor 28 to coil 35, then mover 31 advance and retreat move.Follow this, but sliding bottom Sb, be fixed in sliding bottom Sb adsorption plate 22, and move by dynamic pressure plate 12 advance and retreat that bar 39 is linked to adsorption plate 22 and to carry out mold closing and die sinking.

In addition,, on mover 31, set coil 35, also can on stator, set coil, and on mover, set permanent magnet though on stator 29, set permanent magnet.At this moment, coil does not move when driving linear motor 28, so can be used for the distribution to the coil supply capability easily.

Dynamic model 16 is connected to cover half 15 if but dynamic pressure plate 12 advances (moving to right among the figure), then finishes mold closing.Set between rear fender 13 and adsorption plate 22 as the electromagnet unit 37 of matched moulds with drive division, mold closing carries out matched moulds to allow to then.And, but the bar 39 that links dynamic pressure plate 12 and adsorption plate 22 runs through rear fender 13 and adsorption plate 22 and extends.Bar 39 is when mold closing and during die sinking, but with the advance and retreat interlock of adsorption plate 22 and dynamic pressure plate 12 advance and retreat are moved, when matched moulds, but will be passed to dynamic pressure plate 12 by the mold clamping force that electromagnet unit 37 produces.In addition, but constitute mold closing mechanism 10 by framework Fr, fixation clip 11 dynamic pressure plates 12, rear fender 13, adsorption plate 22, linear motor 28, electromagnet unit 37, bar 39 etc.

Electromagnet unit 37 has the electromagnet 49 that is equipped on rear fender 13 sides and is equipped on the adsorption section 51 of adsorption plate 22 sides.At the predetermined portions of rear fender 13 rear end faces, promptly above leaning on slightly than bar 39 and below be formed with in parallel to each other two have a rectangular section shape that along continuous straight runs extends set the groove 45 of portion as coil.Between groove 45, form magnetic core 46, in the part formation yoke 47 except that magnetic core 46 of rear fender with rectangular section shape.Package coil 48 on magnetic core 46.

And,,, adsorption section 51 is being set with electromagnet 49 opposed parts in adsorption plate 22 encircles rod 39 as the predetermined portions of adsorption plate 22 front end faces.In addition, the magnetic core 46 of rear fender 13 and yoke 47 and adsorption plate 22 are formed by the electromagnetism laminate steel that the thin plate that is made of the ferromagnetism body by lamination forms.And, separates to set electromagnet 49 with rear fender 13, and separate with adsorption plate 22 and to set adsorption section 51, but a part that also can be used as rear fender 13 forms electromagnet, and form the adsorption section as the part of adsorption plate 22.And, may not use the electromagnetism laminate steel, also can use the iron core that constitutes by same parts to form magnetic core 46 and yoke 47.Like this can precision set the distance between the slit well.

Therefore, in electromagnet unit 37, if the supply of the coil 48 to groove 45 in electric currents, then electromagnet 49 is by excitation, and adsorption section 51 is adsorbed and produces mold clamping force.

Bar 39 links at rearward end (being the left part among the figure) and adsorption plate 22, but and links at leading section and dynamic pressure plate 12.Bar 39 is during by mold closing before the adsorption plate 22 and then advance, but dynamic pressure plate 12 advances thus.And, bar 39 during by die sinking adsorption plate 22 retreat (moving to left-hand among the figure) and retreat, but dynamic pressure plate 12 retreats thus.

For this reason, be provided for hole 41 that bar 39 is run through at the middle body of rear fender 13.And, be formed for the hole 42 that bar 39 is run through at the middle body of adsorption plate 22.In addition, the opening of 41 leading sections and set the parts of bearings Br1 such as axle bush of cramp bar 39 sliding freely towards the hole.And, forming screw thread 43 in the rearward end of bar 39, the nut 44 as the thick guiding mechanism of mould that supports freely with respect to adsorption plate 22 rotations is screwed together in screw thread 43.

Carve at mold closing Jie Shu Time, adsorption plate 22 forms slit (gap) δ near rear fender 13 between rear fender 13 and adsorption plate 22.If slit δ too diminishes or it is big too to become, then can't fully adsorb adsorption section 51, cause mold clamping force to diminish.The optimum value of slit δ (distance or size) changes along with the variation of die device 19 thickness.

Therefore, outer peripheral face at nut 44 forms large diameter gear (not shown), adsorption plate 22 set the thick adjustment of mould with motor (not shown) as the thick adjustment drive division of mould, be installed on the thick adjustment of mould with the gears engaged of the minor diameter of the output shaft of motor in the gear that is formed on nut 44 outer peripheral faces.

And if driving mould thick adjustment motor corresponding with the thickness of die device 19, make nut 44 rotate scheduled volumes with respect to screw thread 43 as the thick guiding mechanism of mould, then adjusting lever 39 is with respect to the position of adsorption plate 22, but and adjust the position of adsorption plate 22, thereby slit δ can be made as optimum value with respect to fixation clip 11 and dynamic pressure plate 12.That is, but carry out the thick adjustment of mould by the relative position that changes dynamic pressure plate 12 and adsorption plate 22.

The thick adjustment of this mould is the adjustment of the distance of the gap delta of following the thick variation of mould being carried out coarse adjustment, and for example the fine setting of 0.1mm unit is upward carried out the position of rear fender 13 by position or the change guide rail Gd that change sliding bottom Sb goes up adsorption plate 22.In mold closing mechanism 10, at the installing plate 27 of vertically holding up installation from sliding bottom Sb adsorption plate 22 is installed, the spacer thickness that sandwiches between adsorption plate 22 and the installing plate 27 by adjustment comes the distance of gap delta is finely tuned.In addition, installing plate 27 constitutes, and has rib 27a, even and the reaction force acts of mold clamping force in installing plate 27, also can not produce crooked and keep perpendicularity at the installed surface of installing plate 27.

And, in order to keep the depth of parallelism of electromagnet and adsorption plate, preferably sandwich the pad with whole identical size of electromagnet or adsorption plate, but be difficult to use the pad with the same thickness of this size.Therefore, for example roughly near four jiaos of quadrangle adsorption plate the time, only near 4 fastening positions, sandwich minipad with bolted.At this moment, form the gap, produce the adsorption plate distortion and the flatness variation thereby exist in the part that does not sandwich pad, or to the danger of the problem of the depth of parallelism variation of base.

In addition, constitute the mould thickness adjusting device by the thick adjustment of mould with motor, gear, nut 44, bar 39 etc.And, constitute the rotation transfer part that the thick adjustment of mould is passed to nut 44 with the rotation of motor by gear.And, constitute direction of motion converter section by nut 44 and screw thread 43, in direction of motion converter section, rotatablely moving of nut 44 converts the translatory movement of bar 39 to.

Then, the action to mold closing mechanism 10 describes.

At first, during mold closing, under state shown in Figure 3, supply with electric current to coil 35.Thus, drive linear motor 28, but dynamic pressure plate 12 together advance with adsorption plate 22, as shown in Figure 2, dynamic model 16 is connected to cover half 15.At this moment, between rear fender 13 and adsorption plate 22, i.e. the result who between electromagnet 49 and adsorption plate 51, uses pad that the position of adsorption plate 22 is finely tuned, formation can access such best slit (gap) δ of target mold clamping force F.In addition, during mold closing required power fully less than mold clamping force.

Then, electric current supply is to coil 48, and the absorption affinity absorption by electromagnet 49 is as the adsorption section 51 of the adsorption plate 22 of magnetic.Thus, but absorption affinity be passed to dynamic pressure plate 12 and carry out matched moulds by adsorption plate 22 and bar 39 as mold clamping force.

And decision is supplied to the current value of coil 48, so that mold clamping force becomes the goal-setting value, electric current supply carries out matched moulds to coil 48.During carrying out matched moulds, the resin of fusion is filled into the cavity space of die device 19 from injection nozzle 18 injections in injection device 17.

And, if the resin solidification in the cavity space then under state shown in Figure 2, stops to supply with electric current to coil 48.At this moment, even stop to supply with electric current to coil 48, the 51 also residual magnetic in the adsorption section are so the opposite direction when carrying out matched moulds is supplied with electric current and eliminated the magnetic that residues in adsorption section 51 coil 48.Then, supply with reciprocal electric current to coil 35.Thus, but drive linear motor 28 and dynamic pressure plate 12 retreats, as shown in Figure 3, dynamic model 16 moves to and retreats spacing and carry out die sinking.

In addition, in the present embodiment, set linear motor 28, but replace this linear motor 28 also can set electrodynamic type motor, hydraulic cylinder etc. as the 1st drive division.In addition, when using described motor, rotatablely moving of the rotation that produces by drive motor moves dynamic pressure plate 12 advance and retreat but convert translatory movement to by the ball-screw as direction of motion converter section.

Yet in the mold closing mechanism 10 in the present embodiment, but at the middle body at the rear end face place of dynamic pressure plate 12, promptly the inside of bar 39 sets liftout attachment.Liftout attachment is when carrying out die sinking after carrying out matched moulds, is used for ejecting from dynamic model 16 device of the resin (that is moulding product) of curing.That is, the moulding product are ejected and fall downwards from dynamic model 16 by liftout attachment.Below, the detailed content of this liftout attachment is described.

Fig. 4 and Fig. 5 are the stereograms of internal structure that is used for illustrating the liftout attachment of embodiments of the present invention.And Fig. 6 and Fig. 7 are the cutaway views of internal structure that is used for illustrating the liftout attachment of embodiments of the present invention.In addition, Fig. 8 is the stereogram of the outward appearance of the liftout attachment in the expression embodiments of the present invention.In each figure, same section is added same tag.In addition, Fig. 4, Fig. 6, and the state of Fig. 8 when representing to retreat, the state of (when ejecting the moulding product) when Fig. 5 and Fig. 7 represent to eject.And in the explanation of each figure, the direction of being represented by arrow A is made as the place ahead, and the direction of being represented by arrow B is made as the rear.This direction is consistent with the fore-and-aft direction in the mold closing mechanism 10.

As shown in the figure, the liftout attachment in the present embodiment 100 is mainly by constituting as lower member: motor 101, shell 102, flange 103, shaft coupling 104, BS (ball screw) axle 105 (ball-screws), BS nut 106, connecting rod 107, crosshead 108, knock-pin 109, bearing 110, stop nut 111, and bearing pressing plate 112 etc.

Motor 101 is drive units of liftout attachment 100.That is, knock-pin 109 is by the driving forward-reverse of motor 101.Shaft coupling 104 is to be used to link the motor reel 1011 of motor 101 and the parts (shaft coupling) of BS axle 105.Therefore, rotatablely moving of motor reel 1011 is passed to BS axle 105 by shaft coupling 104.

BS axle 105 and motor reel 1011 be provided in coaxial on, the preset range in its place ahead is formed with threaded portion 1051.Screw togather BS nut 106 on the threaded portion 1051.Therefore, BS nut 106 according to the rotation of BS axle 105 forwards, backwards direction move.That is, be configured for rotatablely moving of motor reel 1011 converted to the straight-line ball screw framework of fore-and-aft direction by BS axle 105 and BS nut 106.

Connecting rod 107 is the parts that link BS nut 106 and crosshead 108 and be used to suppress the rotation of BS nut 106.That is, fix the rearward end of a plurality of connecting rods 107 at the front end face of BS nut 106.The leading section of each connecting rod 107 is fixed in crosshead 108.The rectilinear motion of BS nut 106 is passed to crosshead 108 by connecting rod 107.And each connecting rod 107 fore-and-aft direction runs through the guide hole 115 that is formed at the flange front end face movably.But, each connecting rod 107 by this guide hole 115 with respect to fixing as the direction of rotation of rotating shaft with BS axle 105.Therefore, rotatablely moving of BS nut 106 also is suppressed, and rotatablely moving of BS axle 105 converted to translatory movement effectively.

Central portion in crosshead 108 forms threaded portion 1081, and threaded portion 1081 is screwed with the threaded portion that is formed at knock-pin 109 rearward end, and knock-pin 109 is fixed in crosshead 108 thus.Therefore, knock-pin 109 is according to the forward-reverse of crosshead 108 and forward-reverse.

In addition, the part of motor reel 1011, shaft coupling 104 and BS axle 105 is accommodated in the space cylindraceous 121 that is formed at shell 102 inboards.And the part of BS axle 105 and BS nut 106 are accommodated in and are formed at as in the space cylindraceous 122 that drives flange 103 inboards of transmitting support.Shell 102 as the drive division support has the little outer diameter part that becomes external diameter in its place ahead than ninor feature.By the inside diameter tabling of its little outer diameter part and flange 103, shell 102 and flange 103 engage.

Yet, in the impregnated mode of at least a portion (downside) of the screw part (threaded portion 1051) of BS axle 105 and BS nut 106, be used to reduce to space 122 friction between BS axle 105 and the BS nut 106 lubricating grease (lubricant) for fat.

But, be provided with guide hole 115 at the front end face of flange 103.Therefore, if directly with this state, the danger that then exists lubricating grease to spill from guide hole 115.And, the danger that exists lubricating grease also to spill to the outside from the fitting portion of shell 102 and flange 103.

So, between guide hole 115 that is used to make each connecting rod 107 to run through and connecting rod 115, set O type circle 114 as encapsulant.And, set O type circle 113 at the telescoping part of shell 102 and flange 103.So, on the little outer diameter part of hole 115 that is used to make each connecting rod 107 to run through and shell 102, set O type circle 114 or O type circle 113 as encapsulant.By O type circle 114, connecting rod 107 is moved, and can prevent that lubricating grease from leaking from guide hole 115.By O type circle 113, can prevent that lubricating grease from leaking from the telescoping part of shell 102 with flange 103.

And the lubricating grease in the preferable space 122 does not flow out to space 121.This is because might produce the rotation of sliding and can't suitably transmit motor reel 121 between shaft coupling 104 and motor reel 121 or BS axle 105.But, need to make 105 rotations of BS axle to run through freely between space 121 and the space 122, so can't separate fully between two spaces.

Therefore, in the present embodiment, be formed with the part (little inside diameter) that internal diameter dwindles in the place ahead of shell 102, and be equipped with bearing 110 in the mode that is external in this little inside diameter.The minor diameter supporting BS axle 105 that bearing 110 forms at the rear of the large-diameter portion that is formed with threaded portion 1051.The inner ring of bearing 110 screws togather by the threaded portion 1052 in the minor diameter that is formed at BS axle 105 and fastening stop nut 111 is secured between the rear end face and stop nut 111 of large-diameter portion of BS axle 1051.The outer ring of bearing 110 is fixing by protuberance and bearing pressing plate 112 that the little inside diameter rear at shell 102 forms.Bearing pressing plate 112 is fixed in shell 102 by bolt 1121.

Between space 121 and space 122, set bearing 110,, can not hinder rotatablely moving of BS axle 105 thus and can separate space 121 and space 122 with supporting BS axle 105.Therefore, prevent that lubricating grease from flowing out to space 121.In addition, flow out in order to prevent lubricating grease more reliably, bearing 110 is preferably the band sealed bearing.And, when bearing 110 is not with sealing, can set oil sealing at position with bearing 110 adjacency.

Particularly, as shown in Figure 9, can between bearing pressing plate 112 and BS axle 105, set oil sealing 117.And, as shown in figure 10, also can between the shell 102 of motor 101 sides of stop nut 111 and BS axle 105, set oil sealing 118.

In addition, lubricating grease is by being formed at carrying out for fat hole 1031 of flange 103 to the supply (for fat) in space 122.When manually supplying fat,, blocked for fat hole 1031 for after the fat.When supplying fat automatically, by preventing that from exerting pressure adverse current from getting final product for the fat side.And 122 discharge (row's fat) is to be undertaken by the row's fat hole 1032 that is formed at flange 103 to lubricating grease from the space.That is, space 122 and space outerpace are only by linking for fat hole 1031 and row's fat hole 1032.

The action of liftout attachment 100 then, is described.If supply with electric currents to motor 101 under Fig. 4 and state (the non-state that ejects) shown in Figure 6, then motor 101 drives and motor reel 1011 is rotated.The rotation of motor reel 1011 is passed to BS axle 105 by shaft coupling 104 and BS axle 105 is rotated.At this moment, prevent to be attached to the splashing of lubricating grease of BS axle 105 by flange 103.

BS nut 106 advances according to the rotation of BS axle 105.Because advancing of BS nut 106, knock-pin 109 advances by connecting rod 107 and crosshead 108.If knock-pin 109 advances, then liftout attachment 100 becomes Fig. 5 and state (ejecting state) shown in Figure 7, and the moulding product of curing are outstanding from dynamic model 16 by the leading section of knock-pin 109.

Afterwards, if electric current is supplied to motor 101 to opposite direction, then motor reel 1011 reverses.In view of the above, BS axle 105 also reverses and BS nut 106 retreats.According to retreating of BS nut 106, knock-pin 109 retreats by connecting rod 107 and crosshead 108, and liftout attachment 100 becomes the non-state that ejects.

Then, the set example of liftout attachment 100 to mold closing mechanism 10 described.Figure 11 and Figure 12 are the figure that set example of expression liftout attachment to mold closing mechanism.In Figure 11 and Figure 12, to adding same tag with Fig. 2～Fig. 8 same section, Figure 11 represents the non-state that ejects, and Figure 12 represents the state of ejecting.

As Figure 11 and shown in Figure 12, the bar of mold closing mechanism 10 39 is formed by hollow structure.That is, the inside of bar 39 is formed with space cylindraceous (hollow bulb).Liftout attachment 100 is equipped in this hollow bulb.

And, but central portion at dynamic pressure plate 12, according to the moving range of the crosshead 108 of liftout attachment 100, the face side is formed with space 131 in its back-end, but and is formed with between the front end face of space 131 and dynamic pressure plate 12 and is used to guide hole 132 that knock-pin is run through with respect to dynamic model 16.That is, but crosshead 108 forward-reverse in the space 131 that is formed at dynamic pressure plate 12, but knock-pin 109 ejects the moulding product by running through the guide hole 132 that is formed at dynamic pressure plate 12.

In addition, shell 102 or flange 103 can be integrally formed with bar 39.

As mentioned above, according to the mold closing mechanism 10 of present embodiment, the ball screw framework (BS axle 105 and BS nut 106) that constitutes liftout attachment 100 is equipped in bar 39 volume inside.And this space is only by being used to supply with or discharge the hole and the space outerpace binding of lubricating grease.Therefore, the scope of splashing of the lubricant that is caused by BS axle 105 is suppressed in this space, can prevent effectively that this lubricant from splashing to the periphery of mold closing mechanism 10.

In addition, even the liftout attachment in the present embodiment 100 is not the mold closing mechanism that carries out the die opening and closing action by the driving of linear motor 28, even and the magnetic force that is not to use electromagnet 49 carries out the mold closing mechanism of matched moulds, so long as the direct pressure device just can be used effectively.For example, Figure 13 is the side view that is equipped with the electronic direct pressure device of the liftout attachment in the embodiments of the present invention.

In the mold closing mechanism 500 of Figure 13, the rotation of the motor reel 202 of motor 201 is passed to ball-screw 204 by conveyer belt 203.Nut 205 is by the rotation forward-reverse of ball-screw 204.Fixed bar 206 on the nut 205, but and the rectilinear motion of nut 205 be passed to dynamic pressure plate 207 by bar 206.

At this, bar 206 is similarly formed by hollow structure with the bar 39 of mold closing mechanism 10.Therefore, set liftout attachment 100, thereby similarly prevent splashing of lubricant with mold closing mechanism 10 at the hollow bulb that forms by this hollow structure.

More than, embodiments of the invention are described in detail, but the present invention is not limited to this specific embodiment, can carry out various distortion or change in Ji Zai the aim scope of the present invention in the claims.

Claims

1. mold closing mechanism is characterized in that possessing:

The 1st pressing plate is fixed with a side of a pair of mould;

The 2nd pressing plate is fixed with the opposing party of described a pair of mould, and can moves to die opening and closing direction advance and retreat; And

Bar is fixed on described the 2nd pressing plate, and make mold clamping force from the opposition side of described the 1st pressing plate to described the 2nd pressing plate transmission,

Described bar is a hollow structure, sets ejecting of moulding product at the hollow bulb that is formed by described hollow structure and uses ball screw framework.

2. mold closing mechanism as claimed in claim 1 is characterized in that,

Described ejecting with ball screw framework comprises lead screw shaft and nut,

The screw part of described lead screw shaft and nut is submerged in the lubricant.

3. mold closing mechanism as claimed in claim 2 is characterized in that,

Described hollow bulb comprises the 1st space that sets described ball screw framework,

Described the 1st space is only by being used to supply with or discharge the hole and the binding of other spaces of described lubriation material.

4. mold closing mechanism as claimed in claim 3 is characterized in that,

Described the 1st space is spaced by the bearing that supports described lead screw shaft.

5. mold closing mechanism as claimed in claim 4 is characterized in that,

Be equipped with encapsulant on the described bearing.

6. mold closing mechanism as claimed in claim 4 is characterized in that,

Described bearing separates following two spaces, promptly links described lead screw shaft and the space and described the 1st space that are used to make described lead screw shaft drive shaft rotating.

7. mold closing mechanism as claimed in claim 2 is characterized in that,

On described nut, be fixed for transmitting the straight-line transferring elements of this nut,

Be formed for guide hole that described transferring elements is run through in described the 1st space,

Between described transferring elements and described guide hole, set encapsulant.