The big demoulding angle of injection mould oppositely ejects the oblique top mould emptier
Technical field
The present invention relates to the injection mold technical field, especially relating to a kind of injecting products inwall that is applicable to has the back-off of big demoulding angle, and can only oppositely eject the oblique top mould emptier with the loose core big demoulding angle of injection mould of demoulding occasion of oblique top mode.
Background technology
Oblique top in the injection mould is simple in structure because of it, and requisite space is little, becomes core-pulling mechanism common in the mould of plastics industry.In the general mould structure; the back-off mould emptier of product inwall is taked oblique top or inner core pulling scheme mostly; back-off to the existence of product inside; product inside must have enough spaces to design oblique top mechanism; and demoulding angle is unsuitable excessive; generally be no more than 30 degree, and at the demoulding angle of product inwall back-off at 39 degree, common oblique top mechanism can't realize product stripping.Demoulding angle greater than the oblique tops of 30 degree can't regular event main cause mainly be in the oblique top motion process self-locking to take place and lost efficacy.For reducing mould difficulty and manufacturing cost, aspect wide-angle back-off mould emptier, people have designed multiple mode, each have their own characteristics.
As patent publication No. is CN201120703 injection mold inclined push type mould emptier; comprise push rod; the oblique top head; back die; transverse crown bar and the movable slide block that is embedded on the oblique top head are inserted; slide block insert and the oblique top head between be formed with the forming cavity that is used for the moulding back-off structure; back die is provided with and is parallel to horizontal top slideway that ejects direction and the oblique top slideway that guides an oblique top demoulding; one end of transverse crown bar crosses the oblique top head and is formed with the slide rail that is complementary with horizontal top slideway; slide block is inserted and is fixed on the other end of transverse crown bar; the oblique top head can be slidingly connected on push rod along the direction of motion perpendicular to ejecting direction of oblique top head; this structure is when the demoulding; transverse crown bar can promote the slide block relative oblique top head of inserting and do level and slide left; make the back-off structure of goods break away from the oblique top head; the convenient goods that manually take out can be used for the big goods or the shorter goods demoulding that the flange back-off is arranged again of moulding flank in moulding back-off zone.And for example patent publication No. is that the demoulding liftout attachment of 1,966,239 1 kinds of injection transfer molding machines comprises, be fixed on the board below of injection transfer molding machine and be positioned at the fixed head that the demoulding ejects the position by one group of suspension rod, the cope match-plate pattern that is held up hydraulic oil cylinder driving by two cope match-plate patterns holds up mechanism, the middle template of two middle template picking-up hydraulic oil cylinder driving holds up mechanism, an injection moulding spare ejects the injection moulding spare ejecting mechanism of hydraulic oil cylinder driving, cope match-plate pattern holds up oil cylinder, middle template holds up oil cylinder and injection moulding spare, ejecting oil cylinder is fixedly mounted on the lower surface of fixed head, adopt this demoulding liftout attachment, more convenient in order to the superfluous material of removing on the cope match-plate pattern plane.
More than various stripper apparatus very big with architectural difference of the present invention, by contrast, big demoulding angle of the present invention oppositely ejects the oblique top mould emptier and has more uniqueness and practicality.
Summary of the invention
The objective of the invention is has big demoulding angle in order to solve the injecting products internal face; product inside does not have enough spaces that the problem of other mechanisms is set; a kind of reasonable in design is provided; by increasing oblique top demoulding guiding mechanism and oblique top inner counter top mechanism; adopt the edge of special shape to piece together mode, realize the big coating area of product inwall, big demoulding angle; the big demoulding angle of injection mould that can realize automated production oppositely ejects the oblique top mould emptier, hereinafter to be referred as the oblique top mould emptier.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: the big demoulding angle of a kind of injection mould oppositely ejects the oblique top mould emptier, comprise the external guiding mechanism of oblique top, oblique top inner counter top mechanism, it is characterized in that the external guiding mechanism of described oblique top comprises the oblique top base that is provided with tip chute, in the chute of oblique top base slide block is housed, slide block is provided with guide post, the guide post middle part is provided with guide pad, one side of slide block is provided with gathering sill, gathering sill cooperates with SLIDE GUIDE, connects the lower end of counterdie mold insert on the guide pad; Described oblique top inner counter top mechanism comprises oblique top moulding mold insert, oblique top moulding mold insert has the side working face, the inside of oblique top moulding mold insert is provided with some Zhi Fanding ejector pin mechanisms, and the upper end of counterdie mold insert is pierced into oblique top moulding mold insert and cooperated with gathering sill (being provided with sealing face in the gathering sill) that oblique top moulding mold insert inside is provided with.
The operation principle of the injection mould oblique top demoulding is to utilize mould to eject in the process; the motion that the oblique top mould emptier is angled; make itself and product in the process of moving both vertically, produce displacement; in the mould ejection stroke; the displacement of oblique top mould emptier surpasses product inwall back-off, to realize the purpose of product stripping.From Mechanics of Machinery angle analysis oblique top laws of motion and principle, when its conclusion was the motion of oblique top mould emptier, the oblique top mould emptier was not if there is the enough component that is displaced sideways, and the oblique top mould emptier can lose efficacy in self-locking.
The oblique top mould emptier of the big demoulding angle of injection mould, big forming surface, the problem that solves mainly contains two, the one, how to make big demoulding angle oblique top motion smooth and easy, realize the normal motor function of oblique top mould emptier, and the angle of the product inwall back-off demoulding here is 39 degree, the extreme angles that is higher than the motion of oblique top mould emptier, it is the regular event that is unfavorable for conventional oblique top mould emptier, therefore, adopt oblique top mould emptier base to carry additionally the measure of external guiding mechanism, can solve the problem that causes mechanism kinematic to lose efficacy because of lacking; The 2nd, how to make the product that on the oblique top mould emptier, has big shaping area to coat, eject at the oblique top mould emptier and do not follow the motion of oblique top mould emptier in the process.Solve first problem and just adopt the external guiding mechanism of oblique top of the present invention, this part-structure mainly is to increase external guidance system to oblique top, and the motion of oblique top mould emptier was no longer lost efficacy because angle is excessive, and its design is in the bottom of whole oblique top mould emptier.Solve second problem and adopt oblique top inner counter of the present invention top mechanism; this mechanism is arranged on the following die inside on oblique top moulding mold insert top; realize anti-action of pushing up mechanism by cooperating with following die; this part is mainly utilized the design of oblique top mould emptier kinetic characteristic; built-in anti-top ejector pin mechanism is set in the displacement that utilizes oblique top mould emptier oblique movement to produce; the realization product separates with the oblique top mould emptier, finishes demoulding action.
Because oblique top mould emptier shaping area is bigger; drop is bigger; it is longer to eject distance, for guaranteeing oblique top mould emptier quality of fit, movement clearance, promotes the product appearance quality; two sides at oblique top moulding mold insert are provided with gathering sill; the stroke distances of oblique top mould emptier when the counting yield ejection stroke, should be considered in the motion guide and the location that are used for the oblique top mould emptier; guarantee that the oblique top mould emptier does not break away from gathering sill, guarantees the device sports safety.The oblique top mould emptier has under the situation of sufficient location and guiding at upper cores, following die, and guide post is designed to emptiness avoiding hole when passing the central dividing plate that is located in the mold, i.e. the cooperation in gap is greatly done to reduce the unnecessary die worker that joins.
As preferably, described anti-top ejector pin mechanism comprises thimble, one end of thimble passes fixed block, and the middle part of thimble is provided with the shaft shoulder, and the shaft shoulder is provided with spring towards the other end direction of thimble, oblique top moulding mold insert inside is provided with several centre holes, one end of centre hole leads to the side working face of oblique top moulding mold insert, and the other end of centre hole is provided with spring base, and an end of spring base is provided with fixedly block, fixedly be provided with screw in the block, fixed block is fixed on fixedly in the block by screw and screw.The centre hole matched in clearance of thimble and oblique top moulding mold insert, spring are used for resetting of thimble, and fixed block is used for fixing thimble and spring.When thimble was done demoulding work, spring was compressed, and under the normal condition, the end of thimble flushes with oblique top moulding mold insert side working face, and the quantity and the position of anti-top ejector pin mechanism are provided with by product size, structure.Thimble length in the ejector pin mechanism of different anti-tops is different in size, and the length of thimble is determined by the position that anti-top ejector pin mechanism is positioned at oblique top moulding mold insert.
As preferably, the other end of described counterdie mold insert pierces into the top of oblique top moulding mold insert to oblique top moulding mold insert, is provided with the oblique top mold insert in the top-portion apertures of oblique top moulding mold insert, and the oblique top mold insert cooperates with an end of counterdie mold insert.Promptly go up the top and the oblique top mold insert is combined together fully at the other end of mould full open position counterdie mold insert, in the process of ejecting and eject fully back counterdie mold insert on the top be in released state with the oblique top mold insert, the oblique top mold insert is the interior position of top-portion apertures that is fixed on oblique top moulding mold insert.
As preferably, described guide post is provided with two, and an end is fixed on the slide block, and the other end passes guide pad and is connected with the following position of oblique top moulding mold insert.Guide post adopts cylindrical structure, and guide post and oblique top moulding mold insert adopt alignment pin to be located by connecting, and the guide post fixed block is designed to the slide block form, and guide post is being fixed by bolts on the mold behind the location on the slide block, and installation is changed more convenient.
As preferably, described SLIDE GUIDE is perpendicular to the mold base plate and be fixed on the base plate of mold, and a SLIDE GUIDE side vertically is provided with T type guide rail, the gathering sill matched in clearance of T type guide rail and slide block one side.The oblique top base is installed in the bottom of slide block, and the chute angle of oblique top base is consistent with the product stripping angle, can limit the direction of motion that slide block is loosed core, and avoids destroying product.The power of slide block movement also is design focal point, and the gathering sill angle that is provided with on slide block is consistent with the angle of inclination of whole oblique top mould emptier, cooperates guiding by SLIDE GUIDE, realizes slide block and oblique top moulding mold insert synchronization action.
As preferably, the side working face of described oblique top moulding mold insert is a spherical.Spherical becomes concave arc surface, realizes the demoulding purpose of the big back-off of product inwall.
As preferably, described oblique top moulding mold insert inside is provided with water channel, and the delivery port of water channel is arranged on oblique top moulding mold insert lower surface, and connecting rod is connected with feed pipe through the water route joint by water.The spigot surface on oblique top moulding mold insert top in the course of the work all the time with upper and lower die face friction slip; and this oblique top moulding mold insert internal mechanism is comparatively complicated; stability for assurance device work; guarantee the reliability of whole oblique top mould emptier motion; shorten formed product same period; increase the cooling water road in oblique top moulding mold insert, control oblique top temperature promotes die life.
Effective effect of the present invention is: realized that common oblique top mechanism reaches the product strippings at 39 degree angles to the demoulding angle of product inwall back-off, and simple in structure, easy for installation, can realize product automation production.
Therefore, the present invention is a kind of reasonable in design, and by the multinomial new design to device, the big demoulding angle that makes big molt, moult degree oblique top, oblique top inner counter top mechanism finish the big back-off demoulding of product inwall oppositely ejects the oblique top mould emptier.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is the blast structural representation of Fig. 1 of the present invention.
Fig. 3 be of the present invention a kind of in mold the positional structure schematic diagram.
Fig. 4 is a kind of oblique top mould emptier top structure schematic diagram of the present invention.
Fig. 5 is that a kind of internal water channel of the present invention is moved towards structural representation.
Fig. 6 is that a kind of water channel of the present invention moves towards structural representation with pipe.
Fig. 7 is a kind of mould matched moulds status architecture schematic diagram of the present invention.
Fig. 8 is a kind of cross section structure schematic diagram of the mould matched moulds state of Fig. 7 of the present invention.
Fig. 9 is a kind of status architecture schematic diagram in the process that ejects of the present invention.
Figure 10 is a kind of cross section structure schematic diagram that ejects state in the process of Fig. 9 of the present invention.
Figure 11 is a kind of back status architecture schematic diagram that ejects fully of the present invention.
Among the figure: 1. oblique top moulding mold insert, 2. oblique top mold insert, 3. counterdie mold insert, 4. guide post, 5. guide pad, 6. oblique top base, 7. slide block, 8. SLIDE GUIDE, 9. thimble, 10. fixed block, 11. water route connecting rods, 12. water route joints, 13. long alignment pins, 14. short alignment pins, 15. benevolence plate on upper mounted plate, 16. hot runner manifolds, 17., 18. casters, 19. male model plates, 20. needle plates, 21. end needle plates, 22. bottom plates, 23. water route joint screw threads, 24. water route plugs, 25. springs.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Referring to Fig. 1, the big demoulding angle of a kind of injection mould of present embodiment oppositely ejects the oblique top mould emptier, comprises the two large divisions, and the one, the external guiding mechanism of oblique top, the 2nd, oblique top inner counter top mechanism.
Wherein the external guiding mechanism of oblique top comprises the oblique top base 6 that is provided with tip chute, as shown in Figure 2, the angle of tip chute is consistent with the product stripping angle, slide block 7 is housed in the chute of oblique top base 6, fix two guide posts 4 on the slide block 7, guide post 4 middle parts are provided with guide pad 5, guide pad 5 is provided with the pilot hole greater than guide post 4 diameters, guide post 4 slides in pilot hole, one side afterbody of slide block 7 is provided with T type gathering sill, T type gathering sill cooperates with the T type guide clearance that SLIDE GUIDE 8 is provided with vertically, and the lower end of counterdie mold insert 3 is fixed on the guide pad 5, and guide pad 5 is fixed on the central dividing plate.The upper end of counterdie mold insert 3 is pierced into oblique top moulding mold insert 1 and is cooperated with gathering sill that oblique top moulding mold insert 1 inside is provided with, be provided with sealing face in this gathering sill, adorn an oblique top mold insert 2 at the gathering sill top of oblique top moulding mold insert 1 and cooperate with the top of counterdie mold insert 3, line displacement has carried out spacing on 2 pairs of counterdie mold inserts 3 of oblique top mold insert.
Oblique top inner counter top mechanism comprises oblique top moulding mold insert 1, oblique top moulding mold insert 1 has the working face of side cancave cambered surface, as shown in Figure 4, the inside of oblique top moulding mold insert 1 is provided with 5 anti-top ejector pin mechanisms, anti-top ejector pin mechanism is by thimble 9, fixed block 10, spring 25 is formed, partial structurtes can be referring to Fig. 7 or Fig. 9, the length of 5 thimbles 9 is different, the position different length that is arranged on oblique top moulding mold insert 1 inside by anti-top ejector pin mechanism is also different, short as nearly thimble 9 Design of length of the working face of distance cancave cambered surface, one end of thimble 9 passes hole and the matched in clearance in the fixed block 10, and a shaft shoulder is established at the middle part of thimble 9, and the shaft shoulder is used for locating the spring 25 on the thimble.Oblique top moulding mold insert 1 inside is provided with 5 centre holes, thimble 9 and 5 centre hole matched in clearance, one end of 5 centre holes leads to the working face of the side cancave cambered surface of oblique top moulding mold insert 1, spring base of other end processing of centre hole, spring base is provided with fixedly block towards an end of fixed block, fixedly be provided with two screws in the block, screw is used for fixing fixed block 10.After the assembling, the head of thimble 9 is concordant with the working face of oblique top moulding mold insert 1 cancave cambered surface, and the afterbody syringe needle of thimble 9 protrudes outside oblique top moulding mold insert 1, and the two ends nose shape of thimble 9 is done globulate, and during motion, the bulb of thimble 9 is sliding on the die guide rail down all the time.
On the forming surface of oblique top moulding mold insert 1 the muscle position is arranged, when interfering the oblique top proper motion, general mentality of designing is the glue position of as far as possible avoiding with its interference.In the design of this device glue position, a place is arranged, the motion of obstruction oblique top, but can't avoid the glue position inadequately because of the space, then adopted the mode of oblique top moulding mold insert 1 internal production one counterdie mold insert 3, interference portion glue position is made on the counterdie mold insert 3, and the central dividing plate that is fixed on then in the mold is motionless.Suitably strengthen the sealing face angle of counterdie mold insert 3 and oblique top mould emptier, when angle during greater than oblique top mould emptier angle of inclination, the motion of oblique top mould emptier can not produce interference with counterdie mold insert 3.The oblique top mould emptier produces displacement in the process of ejecting, and ejector pin mechanism maintenance in anti-top is motionless relatively, and this moment, thimble 9 heads exceeded the forming surface of oblique top moulding mold insert 1, and the drop of generation promptly is the distance that oppositely ejects.
As shown in Figure 3, mold comprises upper mounted plate 15, bottom plate 22, and bottom plate 22 is provided with end needle plate 21, needle plate 21 tops in the end are face needle plate 20, slide block base 6 is fixed on the bottom plate 22, and bottom plate 22 medium positions are provided with breach, the space that provides SLIDE GUIDE 8 to move up and down.Mold centre position between upper mounted plate 15 and the bottom plate 22 is provided with male model plate 19, corresponding with male model plate 19 and be arranged on the caster 18 on male model plate 19 tops, upper cores 17 is arranged in the caster 18, be provided with hot runner manifold 16 between caster 18 and the upper mounted plate 15, the top of oblique top moulding mold insert 1 cooperates with the following working face of upper cores 17.
As Fig. 4, shown in Figure 5, many water channels of oblique top moulding mold insert 1 inner processing, the delivery port of water channel is located at the lower surface of oblique top moulding mold insert 1, water route joint screw thread 23 is processed at the delivery port place, block up with water route plug 24 and close at the place, technology aperture of processing, joint screw thread 23 usefulness water route connecting rods 11 are drawn by water, the central dividing plate that water route connecting rod 11 passes in the mold during installation is connected with water route joint 12, the turnover pipe of water route connecting rod 11 is fixed on the mold with long alignment pin 13 and short alignment pin 14 respectively, the head of the water route joint 12 behind the lengthening passes the mold bottom, be exposed at the mould outside, to make things convenient for the external water supply line of mold
Assembled water, electric loop gets final product work.
After the mold die sinking, referring to Fig. 7, Fig. 8, the ejection system of molding machine promotes face needle plate 20 and the end needle plate 21 in the mold, oblique top moulding mold insert 1 begins to move upward, the slide block 7 of oblique top moulding mold insert 1 bottom is under the effect of SLIDE GUIDE 8, chute guiding angle direction along slide block base 6 moves, and SLIDE GUIDE 8 is fixed on bottom plate 22 and keeps motionless.Oblique top moulding mold insert 1 is loosed core along product back-off stripping direction, meanwhile, oblique top moulding mold insert 1 and other ejecting mechanisms push up product together from following die, the anti-top ejector pin mechanism of oblique top moulding mold insert 1 inside is at following die straight body face guide rail top shoe up and down, along with increasing thimble 9 heads of ejection stroke protrude oblique top moulding mold insert 1 arc forming surface gradually, product is pushed up from oblique top moulding mold insert 1 forming surface, referring to Fig. 9, Figure 10, continue to eject until ejecting action and finish, as shown in figure 11, then take off product, finish product automatic demoulding process by manipulator.
Mold resets under the effect of back-moving spring; the oblique top mould emptier is under the driving of liftout plate; whole oblique top mould emptier begins action; the slide block 7 of bottom is under SLIDE GUIDE 8 effects; guide chute along slide block base 6 moves; the oblique top mould emptier moves down gradually, and oblique top moulding mold insert 1 inner thimble 9 backs away under spring 25 effects and resets, and resets fully until whole oblique top mould emptier.
Product ejects when can be subjected to many-sided power in the process and acts on, in the mould of plastics of the big oblique top mechanism that is provided with this device, under the situation that forming surface is very big, the muscle position is very dark a lot, the back-off amount is very big of product, product is very easily and then this device motion in the process of ejecting.Shrink under the effect of package power in the product cooling, get very difficulty of product, so; when design oblique top mould emptier, should take all factors into consideration product pickup problem, as the product needed fully-automatic production; do not adopt the oblique top mould emptier, this is the operation principle decision of oblique top mould emptier as far as possible.Some in particular cases; when having to adopt the oblique top core-pulling mechanism, under the conditions permit situation, the oblique top mould emptier that anti-top is installed can be very practical; utilize the anti-top ejector pin mechanism of design oppositely to eject product, reach the purpose that product breaks away from the oblique top mould emptier in oblique top moulding mold insert 1 inside.
The foregoing description is to explanation of the present invention, is not limitation of the invention, any structure after the simple transformation of the present invention is all belonged to protection scope of the present invention.