CN2267923Y - Mould-clamping large-column structure of injection moulding machine - Google Patents
Mould-clamping large-column structure of injection moulding machine Download PDFInfo
- Publication number
- CN2267923Y CN2267923Y CN 96214374 CN96214374U CN2267923Y CN 2267923 Y CN2267923 Y CN 2267923Y CN 96214374 CN96214374 CN 96214374 CN 96214374 U CN96214374 U CN 96214374U CN 2267923 Y CN2267923 Y CN 2267923Y
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- China
- Prior art keywords
- mould
- clamping
- huge pillar
- stress
- annular groove
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Abstract
The utility model provides a mould-clamping large column structure of an injection moulding machine, which is characterized in that U-shaped ring grooves with proper length are arranged on both sides of the large columns of four sets of mould-clamping large column devices. A round corner is arranged on the bottom corner of the U-shaped ring grooves. The large columns penetrates a middle mould plate, and both ends of the large columns are fixed to the mould plates on both sides. When an oil cylinder is used for driving the middle mould plate to close the mould and demould, the U-shaped ring grooves can absorb the force which is generated by the large columns which clamp the mould to the mould plates on both sides. The minor diameter of the U-shaped ring grooves is provided with a margin for the deformation of the large columns, and the mould clamping on both sides does not lead to an outward bend, which causes the bend, the break or the precision loss of mould clamping for the large columns that clamp the mould. The service life of the large columns which clamp the mould is increased.
Description
The utility model relates to the parts of a kind of injection forming equipment, particularly a kind of injection forming equipment.
General Jet forming machine clamping huge pillar as shown in Figure 1, in the middle of it template A along clamping huge pillar B when corresponding templates A1 does the mold closing action, because of the indirect application of force of intermediate die plate A greater than clamping huge pillar B, push to corresponding templates A1 and left side template A2 at mold closing with when moving back mould, huge pillar nut B1 locks in corresponding templates A1 and left side template A2 on the huge pillar, form reaction force and make corresponding templates A1 and left side template A2 deflection laterally, as shown in Figure 2, also make clamping huge pillar B along with deflection, and rupture at the acute angle B2 place of clamping huge pillar B and huge pillar nut B1 handing-over easily, clamping precision and the big column life of clamping be will influence when serious, and maintenance frequency and cost increased.
The purpose of this utility model is that a kind of Jet forming machine clamping huge pillar new construction will be provided, and it can solve clamping huge pillar breakage problem fully, also can lower maintenance cost, and obtains good mold closing effect, improves the manufactured goods precision.
Utility model is achieved in that in the huge pillar body both sides of four groups of big column devices of clamping and is provided with Qian type annular groove, is provided with fillet at the place, base angle of Qian type annular groove.Length between Qian type annular groove two ends is three times of the big column diameter of clamping.
The utility model is led on the double-screw bolt of huge pillar body and is established a Qian type annular groove, make the big clamping huge pillar of rigidity less in the rigidity at Qian type annular groove position, the displacement of double-screw bolt more can be with template group mobile consistent, make internal stress be difficult for taking place, avoid causing the phenomenon of strain inequality, it avoids the fatigue of materials and the destruction of causing inside configuration when internal stress generation stress is concentrated In-particular; The displacement that while Qian type annular groove is increased, make the displacement at first thereupon of screw thread the 1st tooth, the stress decrease gradient of impelling the 1st tooth is for maximum, avoided screw thread the 1st odontogenesis stress concentrations phenomenon, in a word because the utility model improvement structurally can solve clamping huge pillar breakage problem fully, prolong the big column life of clamping, also can reduce maintenance cost, and can obtain good mold closing effect, improve quality of item.
The concrete structure of utility model is provided by following examples and accompanying drawing thereof.
Fig. 1 is the clamping huge pillar schematic diagram of traditional Jet forming machine.
Fig. 2 is the action schematic diagram of Fig. 1 structure.
Fig. 3 is the utility model Jet forming machine clamping huge pillar new construction schematic diagram.
Fig. 4 is the local enlarged diagram of Qian type annular groove among Fig. 3.
The stress deformation figure of clamping huge pillar and mould when Fig. 5 is locked mode.
Fig. 6 is the high and low stress deformation schematic diagram of rigidity of clamping huge pillar rigidity.
With reference to Fig. 3,4, clamping die device 1 includes three groups of templates 10,11,12, and template 10 and left side template 12 are stiff end, and intermediate die plate 11 is arranged between template 10 and the left side template 12; The big column device 2 of clamping has four groups, the root of each huge pillar body 20 is provided with huge pillar nut 21, each huge pillar body 20 end is provided with the Qian type annular groove 203 that length is three times in big column diameter, and the wedge angle 201 that Qian type annular groove 203 both sides are connected with huge pillar is led to the place, base angle and established a fillet 202.
The Jet forming machine clamping huge pillar new construction of forming by above-mentioned each member, template 10 and left side template 12 are stiff end during action, oil cylinder 13 promotes intermediate die plate 11 and moves along clamping huge pillar 20, corresponding templates 10 is done the mold closing action, intermediate die plate 11 forces in clamping huge pillar 20 indirectly, and the power that acts on is in template 10, and to contact with template 10 with huge pillar nut 21 be fulcrum, outwards deflection, clamping plate huge pillar 20 be outwards deflection thereupon also.And to vertical or horizontal deflection, its Qian type annular groove 203 places can absorb the cross force of deflection, and its both sides fillet 202 can absorb the longitudinal deformation amount after the deflection with the tension force of circular arc,, do not concentrate acute angle because of producing stress, and by the fracture of place, tip, Qian type annular groove 203 with four corner fillets absorbs deflection, reaches stress equilibrium.
The stress deformation figure of clamping huge pillar and mould when Fig. 5 represents locked mode, because the effect of maximum clamping power Fcmax makes the clamping huge pillar relatively produce stretcher strain amount Atb, in the clamping system of articulated type mechanism, promptly this stress deformation concerns.Be reduced representation, only consider the distortion of clamping huge pillar and mould, and Fcmax make simultaneously mould produce the compress variation of Amo.During ejaculation, the average die cavity pressure of plastics and the product of active area produce directed force F r, the decrement Amo of mould is reduced, and increased the stretcher strain amount of clamping huge pillar.When this plastics active force is increased to F
o=Fcmax to F
oDuring=Frperm, finished product just has the burr phenomenon and takes place, i.e. F
oThe deflection that is compressed of mould is disappeared, and the deflection of clamping huge pillar is increased to Atbmax or reach Atbperm, that is between the male and female mould A is arranged
xThe gap.According to the difference of plastic material, melten gel and mold temperature, A
xPermissible value also different thereupon, but general all between 0.05～0.1mm.Because during ejection formation, the clamping huge pillar will bear the tensile force bigger than clamping power.
Fig. 6 is high person of clamping huge pillar rigidity (left side) and rigidity junior's (the right) stress deformation figure.
Above-mentioned stressed-deformation relationship is based on the bullet of mould and clamping system and gives birth to performance, and the two elastic difference can have influence on stress separately, these characteristics can be by example explanation among the figure, scheme short-and-medium and thick tie-rod big rigidity is arranged, thin and long tie-rod relative stiffness is less, when stressed-the deformation relationship of the two is presented at the die clearance generation, the total force that the permission that rigidity is big is bigger (reaction force during ejaculation), the suffered stress of the huge pillar of clamping simultaneously also hangs down the big (Fr1 of person than rigidity
Max＞Fr2
Max).So when design, the clamping huge pillar rigidity high required safety coefficient that heals also need improve.When often the upset operation of burr occurring, can find high more easily the going to pot of clamping huge pillar rigidity, the above-mentioned feature of the proper susceptible of proof of this actual phenomenon.
The utility model and in the finite element analysis mode, analyzed at Jet forming machine clamping huge pillar new construction, research improves the stress distribution situation that forward and backward structure is born, according to the simulation photo that computer screen shows, improving forward and backward structure clamping huge pillar stress distribution has following three characteristics:
1. the offset variable of Y:
Before the architecture advances, Y maximum displacement 0.06mm, Y maximum displacement 0.07mm after the architecture advances.
2. before and after the architecture advances, the stress cloth of each each tooth of screw thread:
| Each tooth order (tooth) of | 1 | 2 3 | 4 | 5 |
| Before the architecture advances | 396 | 275 210 | 169 | 135 |
| After the architecture advances | 335 | 250 231 | 137 | 116 |
The normal stress variable quantity of former double-screw bolt part:
The normal stress of double-screw bolt is 68.8MPa before the architecture advances, establishes a Qian type annular groove 203 parts and lead when double-screw bolt, and then the normal stress in Qian type annular groove 203 parts increases to 114.6MPa.
According to These characteristics, can reach a conclusion, double-screw bolt lead establish a Qian type annular groove 203 after, really improved the stress distribution of each tooth of screw thread, big stress with the 1st, 2 teeth are born disperses to be born by the 3rd tooth, makes each tooth of screw thread be subjected to average stress, can avoid producing the stress concentrations phenomenon, cause structural deterioration.
To above-mentioned conclusion supplemental instruction be, at first double-screw bolt is before improvement, because and template is pushed each other, produce internal stress each other, this internal stress is 0.06mm to the displacement that double-screw bolt caused, under identical internal stress effect, with double-screw bolt lead establish a Qian type annular groove after, the double-screw bolt sectional area reduces, based on power-deformation relationship formula (σ=P/EA), under same stressing conditions, the elongation of screw rod increases, because the displacement of inner each element of the generation material of internal stress does not wait, repel each other and cause the strain uneven phenomenon, especially when stress concentration, will cause inside configuration fatigue of materials and destruction, the displacement during push effect is consistent each other in order to make double-screw bolt and template, avoid the generation of internal stress, the utility model is led on double-screw bolt and is established a Qian type annular groove 203, so that the displacement of double-screw bolt more can be with template is mobile consistent, makes internal stress be difficult for taking place; Secondly stress flow field is that the 1st tooth by double-screw bolt flows to the 2nd, 3 teeth, because the 1st tooth is in abutting connection with the Qian type annular groove 203 of double-screw bolt, the displacement that causes Qian type annular groove 203 to be increased, by the displacement at first thereupon of the 1st tooth, the stress decrease gradient of impelling the 1st tooth is for maximum, reduce to 335MPa by 396MPa, avoided the 1st odontogenesis stress concentrations phenomenon.Therefore design the Qian type annular groove of a suitable length at the appropriate location of the big clamping huge pillar of rigidity, the rigidity at Qian type annular groove position is lowered, avoid stress to concentrate, solved clamping huge pillar breakage problem.
Claims (2)
1. the big rod structure of Jet forming machine clamping comprises clamping huge pillar body, it is characterized in that: Qian annular groove (203) is established in huge pillar body (20) both sides at four groups of big column devices of clamping (2), is provided with fillet (202) at the place, base angle of Qian type annular groove (203).
2. Jet forming machine clamping huge pillar new construction according to claim 1 is characterized in that length between Qian type annular groove (203) two ends is three times of the big column diameter of clamping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96214374 CN2267923Y (en) | 1996-07-08 | 1996-07-08 | Mould-clamping large-column structure of injection moulding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96214374 CN2267923Y (en) | 1996-07-08 | 1996-07-08 | Mould-clamping large-column structure of injection moulding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2267923Y true CN2267923Y (en) | 1997-11-19 |
Family
ID=33896503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96214374 Expired - Fee Related CN2267923Y (en) | 1996-07-08 | 1996-07-08 | Mould-clamping large-column structure of injection moulding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2267923Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295044C (en) * | 2001-02-23 | 2007-01-17 | 赫斯基注射器成型系统有限公司 | Barrel assembly |
| CN101704288B (en) * | 2009-10-15 | 2012-01-11 | 宁波南嵘机械有限公司 | Movable mould-locking large-column injection molding machine |
-
1996
- 1996-07-08 CN CN 96214374 patent/CN2267923Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295044C (en) * | 2001-02-23 | 2007-01-17 | 赫斯基注射器成型系统有限公司 | Barrel assembly |
| CN101704288B (en) * | 2009-10-15 | 2012-01-11 | 宁波南嵘机械有限公司 | Movable mould-locking large-column injection molding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |