Resistance to stress polygamy fits the injection mould of formula plastic barrel bung
Technical field
The utility model belongs to injection mold technology more particularly to a kind of resistance to stress polygamy fits formula plastic barrel bung
Injection mould.
Background technology
Plastic barrel can be used for the storage and transport of various objects, it has non-friable, non-corrosive, light, oil resistant, corrosion-resistant
The advantages of, therefore have a wide range of applications in daily life, such as needing heat preservation, moisture-proof, pressure-resistant, erosion-resisting article packet
Dress, the material of plastic barrel mostly use the plastics such as polyethylene, polypropylene, polyester, are formed through blowing, injection molding, plastic uptake, rotational moulding, are mostly used
In containing, industries liquid, solid article, the existing plastic barrel bungs such as chemical industry, pesticide, medicine, food, hardware electronics, electromechanics are general
For store-through in the problem of resistance to stress effect difference, easily there is the problem of stress cracking in the variation with external external force, humidity or temperature.
For example, Chinese utility model patent discloses a kind of novel plastic bucket bung [application number:201320569711.1],
The utility model patent includes bung ontology, and a pair of of mounting groove is symmetrically formed at the upper surface both ends of the bung ontology,
Screw device is installed in the mounting groove, the screw device by movable head, screw handle and axis pin is constituted, the movable head is solid
One end that handle is twisted loaded on fine jade, the other end that handle is twisted in fine jade are formed with an opening, and the end of opening is coated with holding rod, described
Movable head is rotatably installed in by axis pin in mounting groove.
The bung that the utility model provides has the advantages of convenient for opening and screwing, facilitate carrying, but it still has
State problem.
Utility model content
The purpose of this utility model is in view of the above-mentioned problems, providing a kind of injection molding of the suitable formula plastic barrel bung of resistance to stress polygamy
Mould.
In order to achieve the above objectives, the utility model uses following technical proposal:
A kind of resistance to stress polygamy fits the injection mould of formula plastic barrel bung, including solid plate and moving platen, injection hole are opened in
On solid plate, the solid plate is equipped with the first forming face of one side surface of moulding plastics bucket bung, and the moving platen is equipped with
Second forming face of another side surface of moulding plastics bucket bung, the first forming face and the second forming face form forming cavity, described dynamic
Template is equipped with for the molding frame forming core of plastic barrel bung frame and is used for the molding cover board of plastic barrel bung cover board
Core is shaped, the cover board forming core protrudes from the upper surface of moving platen, and frame shapes the side of core and cover board forming core
Edge connects and frame forming core joins end to end structure annular in shape, further includes several resistance to stress decorative pattern forming cavities, described anti-to answer
Power decorative pattern forming cavity, which is arranged, to be shaped core upper surface in cover board and shapes the inner recess of core to cover board.
In the injection mould that above-mentioned resistance to stress polygamy fits formula plastic barrel bung, the resistance to stress decorative pattern forming cavity includes cross
The orthogonal first resistance to stress decorative pattern forming cavity of axial line and the second resistance to stress decorative pattern forming cavity in section, each first anti-answers
It is mutually parallel between power decorative pattern forming cavity.
In the injection mould that above-mentioned resistance to stress polygamy fits formula plastic barrel bung, the first resistance to stress decorative pattern forming cavity and
It is interconnected between second resistance to stress decorative pattern forming cavity, and the first resistance to stress decorative pattern forming cavity and the second resistance to stress decorative pattern forming cavity
Oval, interconnected the first resistance to stress decorative pattern forming cavity and the second resistance to stress decorative pattern forming cavity cross section in cross section
The center of circle overlap.
In the injection mould that above-mentioned resistance to stress polygamy fits formula plastic barrel bung, the first resistance to stress decorative pattern forming cavity and
The cross-sectional area of second resistance to stress decorative pattern forming cavity is gradually become by the one end for shaping core upper surface close to cover board towards the other end
It is small.
In the injection mould that above-mentioned resistance to stress polygamy fits formula plastic barrel bung, the frame forming core includes limiting section
Forming face and holding section forming face, the limiting section forming face and holding section forming face are mutually perpendicular to, and the two pass through it is smooth
Cambered surface is connected.
In the injection mould that above-mentioned resistance to stress polygamy fits formula plastic barrel bung, the one of side of the frame forming core
The upper surface on side has the rotating junction forming cavity to lower recess.
In the injection mould that above-mentioned resistance to stress polygamy fits formula plastic barrel bung, if the rotating junction forming cavity has
The rotating junction forming cavity of dry group, difference group differs at a distance from frame forming Core edge, same group of rotation connection
Portion's forming cavity is penetrated through by a cylinder axis hole forming core.
In the injection mould that above-mentioned resistance to stress polygamy fits formula plastic barrel bung, further includes several pieces and protrude from cover board forming
The buffer part of core upper surface shapes core, and the edge that the buffer part forming core shapes core by arc surface and frame connects
It connects, the thickness of the buffer part forming core is less than the half of frame forming core thickness.
Further include several knock-pins, the top in the injection mould that above-mentioned resistance to stress polygamy fits formula plastic barrel bung
One end of rod extends into moving platen, is connected to the second forming face.
In the injection mould that above-mentioned resistance to stress polygamy fits formula plastic barrel bung, further includes several pieces and protrude from moving platen table
The molding locating piece in face.
Compared with prior art, the utility model has the advantage of:
1, the stress resistance of the plastic barrel bung of the utility model institute injection molding can be strong, it is not easy to occur because of external force, wet
The variation of degree or temperature and the problem of crack.
2, the cover board upper surface of the plastic barrel bung of the utility model institute injection molding have buffer part, can bung by
Play the role of buffering when external impact force, there is preferable protecting against shock ability.
3, the plastic barrel bung of the utility model institute injection molding, which can match, fits the different plastic barrel of a variety of openings of sizes, has
Wider application range.
Description of the drawings
Fig. 1 is the birds-eye perspective of the utility model;
Fig. 2 is that the back of the body of the utility model regards perspective view;
Fig. 3 is the left view perspective view of the utility model;
Fig. 4 is the structural schematic diagram of moving platen;
In figure:Solid plate 1, moving platen 2, forming cavity 3, knock-pin 4, molding locating piece 5, injection hole 11, the first forming face
12, the second forming face 21, frame forming core 31, cover board forming core 32, resistance to stress decorative pattern forming cavity 33, the first resistance to stress flower
Line forming cavity 34, the second resistance to stress decorative pattern forming cavity 35, limiting section forming face 36, holding section forming face 37, rotating junction at
Shape chamber 38, axis hole forming core 39, buffer part forming core 3a.
Specific implementation mode
The utility model is described in more detail with reference to the accompanying drawings and detailed description.
In conjunction with shown in Fig. 1 and Fig. 2, a kind of resistance to stress polygamy fits the injection mould of formula plastic barrel bung, including solid plate 1 and dynamic
Template 2, injection hole 11 are opened on solid plate 1, and the solid plate 1 is equipped with the first one-tenth of one side surface of moulding plastics bucket bung
Shape face 12, the moving platen 2 are equipped with the second forming face 21 of another side surface of moulding plastics bucket bung, 12 He of the first forming face
Second forming face 21 forms forming cavity 3, and the moving platen 2 is equipped with shapes core for the molding frame of plastic barrel bung frame
31 and core 32 is shaped for the molding cover board of plastic barrel bung cover board, the cover board forming core 32 protrudes from moving platen 2
Upper surface, the edge that frame forming core 31 shapes core 32 with cover board is connect and frame forming core 31 joins end to end annularly
Structure further includes several resistance to stress decorative pattern forming cavities 33, and the setting of resistance to stress decorative pattern forming cavity 33 shapes core in cover board
32 upper surfaces and the inner recess that core 32 is shaped to cover board.
The utility model, in use, moving platen 2 is molded with solid plate 1, to the first forming face 12 and the second forming face 21
Be combined as forming cavity 3, the plastic cement of molten condition from injection molding machine by 11 injection molding chamber 3 of injection hole, after cooled and solidified, system
Integrally formed cover board and frame are obtained, frame is looped around side edge thereof, and the upper surface of cover board, which has to the resistance to stress of lower recess, spends
Line, so that the stress resistance of the plastic barrel bung of injection molding can be strong, it is not easy to the change because of external force, humidity or temperature occur
The problem of changing and cracking.
On solid plate 1 with the first forming face 12 with moving platen 2 with the second forming face 21 while it is opposite,
First forming face 12 and the second forming face 21 form forming cavity 3, and injection hole 11 is opened on solid plate 1, and frame shapes core 31
Moving platen 2 is protruded from cover board forming core 32, and frame forming core 31 is looped around the edge of cover board forming core 32, if
The upper surface that core 32 is shaped in cover board is arranged in the dry resistance to stress decorative pattern forming cavity 33 that 32 inner recess of core is shaped to cover board,
In use, moving platen 2 is molded with solid plate 1, to which the first forming face 12 and the second forming face 21 are combined as forming cavity 3, melt
The plastic cement of state from injection molding machine by 11 injection molding chamber 3 of injection hole, after cooled and solidified, be made integrally formed cover board and
Frame, frame are looped around side edge thereof, and the upper surface of cover board has the resistance to stress decorative pattern to lower recess, so that injection molding
The stress resistance of plastic barrel bung can be strong, it is not easy to the problem of generation is cracked because of the variation of external force, humidity or temperature.
Specifically, the resistance to stress decorative pattern forming cavity 33 includes orthogonal first resistance to stress of axial line of cross section
Decorative pattern forming cavity 34 and the second resistance to stress decorative pattern forming cavity 35 are mutually parallel between each first resistance to stress decorative pattern forming cavity 34,
It is interconnected between the first resistance to stress decorative pattern forming cavity 34 and the second resistance to stress decorative pattern forming cavity 35, and the first resistance to stress is spent
The first oval, interconnected resistance to stress decorative pattern of the cross section of line forming cavity 34 and the second resistance to stress decorative pattern forming cavity 35
The center of circle of 35 cross section of forming cavity 34 and the second resistance to stress decorative pattern forming cavity overlaps, and resistance to stress decorative pattern molding in this way has mutual
Vertical both direction, the stress of different directions of generation can be coped with by being conducive to plastic barrel bung in this way, and unidirectional
It is mutually parallel between decorative pattern, the maximum value that plastic barrel bung bears a direction stress can be improved in this way.
Preferably, the cross-sectional area of the first resistance to stress decorative pattern forming cavity 34 and the second resistance to stress decorative pattern forming cavity 35 by
One end close to 32 upper surface of cover board forming core is tapered into towards the other end, and the inner wall of resistance to stress decorative pattern molding in this way is
One arc, is convenient for the dispersion of stress, and cross-sectional area is by shaping one end of core 32 upper surface close to cover board towards another
Gradually smaller design is held to facilitate the knockout course after the completion of injection molding.
As shown in figure 4, the frame forming core 31 includes limiting section forming face 36 and holding section forming face 37, the limit
Position portion forming face 36 and holding section forming face 37 are mutually perpendicular to, and the two is connected by smooth cambered surface, holding section forming face
37 are molded for bung and the part that staving fastens, and limiting section forming face 36 is used to be molded the limiting section inside bung so that
Bung covers when on staving with suitable connection area.
In conjunction with shown in Fig. 2 and Fig. 3, the upper surface of 31 one of side of the frame forming core has to lower recess
Rotating junction forming cavity 38, the rotating junction forming cavity 38 have several groups, the rotating junction forming cavity of difference group
38 differ at a distance from frame forming core 31 edge, and same group of rotating junction forming cavity 38 is cylinder by one
Axis hole forming core 39 penetrates through.
Rotating junction forming cavity 38 is used for the molding of rotating junction, and rotating junction makes staving and bung rotate to connect
It connects, rotating junction forming cavity 38 has shapes the different several groups of 31 Edge Distance of core with frame, may make system in this way
The bung obtained can select the rotating junction of different location be attached according to the openings of sizes of staving, therefore realize and a variety of openings
There is the purpose that plastic barrel of different sizes matches wider application range, cylinder axis hole forming core 39 to run through
Cross same group of rotating junction forming cavity 38 so that axis hole is formed on rotating junction, axis hole is matched with the shaft on staving
It closes and realizes rotation connection, axis hole forming core 39 can be done with respect to moving platen 2 along the sliding perpendicular to 2 sidewall direction of moving platen, opened
When mould, axis hole forming core 39 is first set to skid off moving platen 2 from side, then solid plate 1 and moving platen 2 is made to detach.
As shown in figure 4, further including several pieces of buffer part forming core 3a for protruding from 32 upper surface of cover board forming core, institute
Buffer part forming core 3a is stated to connect with the edge of frame forming core 31 by arc surface, the buffer part forming core 3a's
Thickness is less than the half of frame forming 31 thickness of core, and buffer part can play buffering when bung is by external impact force
Effect, buffer part shape core 3a by arc surface and frame forming core 31 edge connect can reduce buffer part side by
The probability of additional impact force, the thickness that buffer part shapes core 3a can less than the half of frame forming 31 thickness of core
While so that buffer part is played preferable cushioning effect, also it is unlikely to so that the thickness of bung entirety is excessive.
As shown in figure 3, further including several knock-pins 4, one end of the knock-pin 4 extends into moving platen 2, with second
Forming face 21 is connected to, and after cooling and shaping, knock-pin 4 does the sliding of opposite moving platen 2, completes the knockout course of product, it is preferable that
Wherein there is one end of several knock-pins 4 to be located in frame forming core 31, and be circumferentially uniformly distributed along frame forming core 31,
The end of at least one knock-pin 4 is located in cover board forming core 32, can be ejected product so that in ejection process in this way
Be more uniformly stressed, reduce the probability that product damages in ejection process.
As shown in figure 4, further including several pieces of molding locating pieces 5 for protruding from 2 surface of moving platen, moving platen 2 and solid plate 1
It can be positioned according to molding locating piece 5 in molding, to be in when the first forming face 12 and the second forming face 21 being made to be molded
Corresponding position ensure that the quality of injecting products.
The operation principle of the utility model is:In use, moving platen 2 is molded with solid plate 1, to 12 He of the first forming face
Second forming face 21 is combined as forming cavity 3, the plastic cement of molten condition from injection molding machine by 11 injection molding chamber 3 of injection hole,
After cooled and solidified, it is made integrally formed cover board and frame, several orthogonal first resistance to stress decorative pattern forming cavities 34 and the
Two resistance to stress decorative pattern forming cavities 35 are distributed in cover board upper surface so that and the stress resistance of the plastic barrel bung of injection molding can be strong,
The problem of being less likely to occur to crack because of the variation of external force, humidity or temperature, when being molded after the completion of injection molding, first by axis hole forming
Core 39 extracts moving platen 2 out, then opens solid plate 1 and moving platen 2, and injecting products are ejected using knock-pin 4, when being assembled with staving,
The rotating junction of different location is selected to be rotatablely connected according to the openings of sizes of staving.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although solid plate 1, moving platen 2, forming cavity 3, knock-pin 4, molding locating piece 5, injection molding is used more herein
The 11, first forming face 12 of mouth, the second forming face 21, frame forming core 31, cover board forming core 32, resistance to stress decorative pattern forming cavity
33, the first resistance to stress decorative pattern forming cavity 34, the second resistance to stress decorative pattern forming cavity 35, limiting section forming face 36, holding section forming face
37, the terms such as rotating junction forming cavity 38, axis hole forming core 39, buffer part forming core 3a, but be not precluded and use it
The possibility of its term.The use of these terms is merely for the convenience of describing and explaining the nature of the invention;It
To be construed to any one of the additional limitations all be contrary to the spirit of the present invention.