CN100427288C

CN100427288C - Injection mould, preform and container used for bottom with suspension

Info

Publication number: CN100427288C
Application number: CNB2004100816919A
Authority: CN
Inventors: 石川浩
Original assignee: Aoki Technical Laboratory Inc
Current assignee: Aoki Technical Laboratory Inc
Priority date: 2003-12-26
Filing date: 2004-12-24
Publication date: 2008-10-22
Anticipated expiration: 2024-12-24
Also published as: JP4423030B2; CN1636700A; KR20050067016A; TW200530006A; TWI399273B; JP2005186532A

Abstract

To provide an injection mold which can mold an oblong and flat suspending tool on a bottom surface of a preform using a bottom mold and a sprue bush, the suspending tool being housed on the bottom surface of a vessel without being folded, does not increase flow resistance of a resin, and can mold the preform even if the suspending tool is more oblong than the diameter of the preform. The injection mold comprises an injection cavity mold 1 molding a preform body portion by being closed with a neck mold 5, an injection core 6 located in the cavity through the neck mold 5, a pair of plate-like bottom molds 3 and 3 both face to face mounted on the bottom surface of the injection cavity mold 1 with the tip ends abutted with each other so that both can be opened and closed, a mold surface 12a of the preform bottom portion being formed on the upper surface of the abutted surfaces, a resin passage 8 being formed between the abutted surfaces, and a sprue bush 4 having a flat tip end surface to abut the lower surface of the abutted surfaces of both the bottom molds. The suspending cavity 9 is oblongly formed between the tip end surface of the sprue bush 4 and the lower abutted surface of both the bottom molds 3 and 3.

Description

Be used for injection mould, prefabricated component and container that the bottom surface has the prefabricated component of suspender

Technical field

The present invention relates to be used to form prefabricated component and prefabricated component that forms at the injection mould of this prefabricated component bottom all-in-one-piece suspender, by injection mould and the container that forms by prefabricated component by stretch blow-molded.

Background technology

Conventional art discloses such device, by a pair of removable bed die is disposed opposite to each other, and movable on injecting cavity mould bottom, prefabricated component that forming instils penetrates liquid container and the suspender that forms one in the bottom.Die joint between removable bed die, one of them device has the chamber of vertical formation suspender, and another device has towards the chamber of the suspender of vertical direction bending.

1: the 04-163107 Japan Patent of referenced patent open file (=US5,049,749)

1: the 2003-80588 Japan Patent of referenced patent open file.

Summary of the invention

In a kind of conventional art, because suspender and lower surface vertically form, and therefore, have the vertical chamber that is used for above-mentioned suspender, thereby prefabricated component stretch blow-molded one-tenth is had the container of suspender in the bottom, but be difficult to suspender is inserted in the groove that forms on the blowing mould bed die.Be formed on the blowing mould bed die notch a bit if suspender misses, then this suspender will be crooked on bed die, and become the obstacle that forms container bottom, and usually form defective.In addition, this suspender is from the base curve of connecting portion, on the bottom that is embedded in container after the formation, but because the bend elastic recovery of making by synthetic resin, so this suspender trends towards stretching out from base portion.This has just influenced self-supporting ability, and this container becomes unstable, thereby suspender needs holding device.

Be used for the also situation in the chamber of folding suspender of bending, because this suspender also is folded, therefore when the lower end that makes suspender by the extension of stretching bar contacted bottom blowing mould, this suspender was folding in the folding part of bed die.So can not become molded obstacle, but also elastic recovery of folding part in this case.Like this, suspender also needs holding device to stop suspender to stretch out from the bottom.

The problem of the suspender on bottom being integrally formed in mainly is the bending of one suspender and folds that wherein this suspender vertically forms towards the prefabricated component lower surface, thereby suspender is embedded in the bottom of container.Like this, can form suspender, just can solve the problem of one suspender by when needs use, like this suspender being embedded in the bottom and being bent upwards.

In addition, the runner that is used for injecting cavity becomes the suspender chamber, and the chamber capacity of this suspender is compared less with injecting cavity, simultaneously because outstanding and bending part, flow resistance does not become big with there being comparing of suspender general type, thereby is not preferred in injection and filled synthetic resin.Like this, can solve the problem of injection mould by forming the chamber that independently is used for suspender with resin flow channel.

The purpose of this invention is to provide a kind of novel injection mould, this injection mould can not need suspender crooked or folding to be embedded into the bottom of container simultaneously at formation level and straight suspender on the prefabricated component bottom; Resin is fed directly in the injecting cavity, is not used for the chamber of suspender and do not flow through, thereby flow resistance does not increase; Even and suspender also can the injection moulding prefabricated component when longer than prefabricated component.

In addition, another object of the present invention provides and is formed on the bottom by above-mentioned injection mould and has the prefabricated component of suspender, and provides by prefabricated component being carried out the stretch blow-molded container that forms.

In order to address the above problem, one aspect of the present invention relates to the injection mould that is used for having in the bottom prefabricated component of suspender, and this injection mould comprises: eck mould; Can close to form the injecting cavity mould in prefabricated component main part chamber with described eck mould; Pass the inject cores that is positioned at the chamber of described eck mould; The pair of plate-shaped bed die, described bed die has the front surface that contacts with each other, and movable so that open and close below the injecting cavity mould, and the last contact-making surface of bed die forms the mould surface of prefabricated component bottom, and forms runner between the bed die contact-making surface; Gate bush with the straight end face that contacts with contact-making surface under the bed die; And the chamber that is used for suspender, described chamber level is formed under gate bush end face and the bed die between the contact-making surface.

Another aspect of the present invention relates to a kind of injection mould that is used for having in the bottom prefabricated component of suspender, and this injection mould comprises: a pair of removable injecting cavity mould, and it has downward tapered outer surface; Fixed die, it has the injecting cavity mould and is embedded into wherein open interior, and the inner surface of described opening is against each other, and is and tapered and parallel with the tapered downwards outer surface of injecting cavity mould; The a pair of tabular bed die that inserts from the fixed die sidepiece, its front surface contacts with each other, and be moveable in the fixed die open bottom and open and close the position, wherein the last contact-making surface of bed die forms the mould surface bottom the prefabricated component, and forms runner between the bed die contact-making surface; Gate bush is positioned at described fixed die lower central, and has the straight upper surface that contacts with contact-making surface under the bed die; The chamber that is used for suspender, described chamber level are formed under the end face of gate bush and the bed die between the contact-making surface; Be parallel to a plurality of pilot pins in the outside that conical surface extend into open bottom and bed die obliquely; And the helical spring that centers on the pilot pin installation; Wherein, described pilot pin passes collapsible die and inserts reinforcing, and the injecting cavity mould utilizes elastic compression to install, and movable to open and close in opening.

Another aspect of the present invention relates to a kind of form by

claim

1 or 2 described injection moulds, prefabricated component of having suspender at its lower surface, wherein, described prefabricated component has the main part that forms by the injecting cavity mould, the bottom that forms by bed die, and with lower surface integrally formed horizontally suspend part, wherein via the Connection Element that forms in runner, described suspender is formed under the end face of gate bush and the bed die in the chamber that is used for suspender between the contact-making surface.According to claim 3 have the prefabricated component of suspender at lower surface, and wherein, the length of described suspender is bigger than the diameter of prefabricated component, and described suspender comprise a pair of can be from the upwards folding symmetrical ring of base portion.

Another aspect of the present invention relate to a kind of by in blowing mould to carrying out the container that stretch blow-molded forms as claim 3 or the 4 described prefabricated components that have suspender in the bottom.

In above-mentioned injection mould, between the following closing surface of gate bush end face and bed die, the chamber level that is used for suspender independently forms, thus runner resemble common molded and guaranteed that and resin is injected directly into injecting cavity from gate bush.The chamber that promptly is used in suspender is positioned at the injecting cavity front, and then this resin flow resistance does not increase yet, and does not form joint mark on prefabricated component.

In addition, be formed for the chamber of suspender by bed die and gate bush.Like this, reduced the quantity of the mold component in the chamber that is used for suspender, the injection mould built-up time is compared also not long with common die, and cost does not uprise.

Because suspender is ensconced container bottom when molded, therefore do not stretch out from container base at suspender, this container can oneself erect, and has integrally formed suspender at lower surface, and when using container, this suspender can upwards fold.Therefore, this container can be by not deviating to fall from suspender, and do not need holding device at the suspender of container bottom, and the self-supporting ability is very high.

Description of drawings

Fig. 1 is according to the cross sectional side view that is in the injection mould of open mode of the present invention.

Fig. 2 is the cross sectional plan view along the injection mould on bed die plane.

Fig. 3 is the cross sectional side view that is in injection mould under the closure state.

Fig. 4 is the cross sectional side view of fixed die bottom.

Fig. 5 is the cross sectional side view of injection mould when forming prefabricated component.

Fig. 6 is for when taking-up cross sectional side view along the injection mould of pilot pin axle during prefabricated component.

Fig. 7 is the cross sectional side view of stretch blow-molded.

Fig. 8 is for by forming the profile of container to the prefabricated component stretch blow-molded.

Fig. 9 shows container bottom (A) and prefabricated component bottom (B).

The specific embodiment

In the accompanying drawings, 1 is the injecting cavity mould, and 2 is fixed die, and 3 is tabular bed die, and 4 is gate bush, and 5 is eck mould, and 6 is that inject cores and 7 is injection nozzle.

Injecting cavity mould 1 above-mentioned comprises a pair of

collapsible die

11,11 with downward tapered outer surface, half chamber 12a, the 12a of injecting cavity 12 is used to utilize inject cores 6 to form the main part of prefabricated component 10 as the recess on each die joint that is formed on collapsible die 11,11.Recess 11b, 11b are formed on the die joint, and eck mould 5 above-mentioned is embedded in wherein, and as shown in Figure 6, a pair of bullport 13, the 13 parallel conical surfaces that the upper end has ladder are passed down through the arrival outside, and have sufficient distance.

This fixed die 2 comprises block, and on this block, the inboard on top is formed with opening 21, on plane, this opening 21 is a rectangle, and the inboard of this block bottom is formed with recess 22, this recess 22 is communicated on the opening 21, and described block keeps flat and upwards is fixed on the pedestal.The inner surface of opening 21 towards each other upwards forms conical surface, and this surface is parallel to lower conical surface with

collapsible die

11,11, and can be coupled on the injecting cavity mould 1.

The outside in this opening 21 conical surfaces bottom, a pair of bed die 3,3 forms the bottom of the injecting cavity mould 1 that is coupled to opening 21, and they can insert from the sidepiece of fixed die 2 with seesawing, contact with each contact-making surface.On contact-making surface on the bed die 3,3, the bed die surface 12b that forms prefabricated component 10 outer lower surfaces forms recess, and runner 8 is formed on the center between the contact-making surface simultaneously.In addition, the outer end of

bed die

3,3 is connected on the piston as the

telecontrol equipment

31,31 of cylinder or fluid cylinder that is fixed on fixed die 2 outer surfaces.

Many have

helical spring

24,24 around its installation to

pilot pin

23,23, these pins tilt to penetrate and are parallel to inner surface 21a, the 21a that makes progress tapered, enter into the bottom of

bed die

3,3 outside upper sheds 21, and

pilot pin

23,23 passes the

bullport

13,13 of

collapsible die

11,11 and inserts.The end of this

pilot pin

23,23 is fixed to the top edge of bullport, and injecting cavity mould 1 keeps by

helical spring

24,24 usefulness elastic compression.

Gate bush 4 pass fixed die 2 recess 22 upper shed and insert.The end face of this gate bush 4 is flat, and this end face contacts with this following contact-making surface to bed die 3,3.By the recess 3a, the 3a that are formed on the

bed die

3,3 are formed this contact with the upper end cooperation of gate bush 4.Gate bush 4 also is used as the supporting of bed die 3,3 ends.

The chamber 9 that is used for suspender is formed between the end face and 3,3 times contact-making surfaces of bed die of gate bush 4, and is used for the chamber 9 levels formation of suspender, and is vertical with the direction of motion of bed die 3,3.The chamber 9 that is used for suspender is longer than the diameter of prefabricated component, stretches out from the protuberance of prefabricated component, and comprises a pair of straight ring.

Eck mould 5 is installed in rotation and transports below the plate 51, and this rotation is transported plate 51 and can be moved up and down, and eck mould 5 can be towards the direction motion identical with

collapsible die

11,11 to open wide and to close, and it keeps by keeper 52.This inject cores 6 can pass eck mould 5 and be independent of rotation and transport plate 51 and transport plate 51 tops from this rotation and move up and down.

As shown in Figure 1, in order to utilize injection molding to come to carry out injection-molded to the prefabricated component 10 that has the one suspender in the bottom with said structure, when injecting cavity mould 1 is in opening-wide state,

bed die

3,3 should travel forward and contact with each other with the end face at them, thereby at first forms runner 8, bed die surface 12a and be used for the chamber 9 of suspender.

As next procedure, when eck mould 5 and rotation were transported plate 51 and moved downward together, inject cores 6 at first moved in the

collapsible die

11,11, and eck mould 5 contacts with the upper surface of keeper 52 with

collapsible die

11,11 then, and promotes this collapsible die 11,11.When these collapsible die 11,11 compression

helical springs

24,24 and under the guiding of

pilot pin

23,23 when close to each other, this

collapsible die

11,11 is pushed in the opening 21 dearly.In this pushing course, the conical outer surface of

collapsible die

11,11 contacts with taper opposite inner face 21a, the 21a of opening 21, and collapsible die 11a, 11a are pushed downward to the upper surface of bed die 3,3, close in the bottom of opening 21, and they are more near also closing fully simultaneously.

Therefore, as shown in Figure 3, injecting cavity mould 1 usefulness eck mould 5 is in off position closed, and inject cores is positioned at the center, forms the injecting cavity 12 of prefabricated component 10.Injecting cavity 12 bottoms with opening of runner 8 are formed between the lower surface of bed die surface 12b and inject cores 6, and this bed die surface 12b is formed on the last contact surface of bed die 3,3.After mould is closed, as clamping force, and stop injecting cavity 12 to be opened by injection pressure from eck mould side applied pressure.

Behind closing molding, when being expelled to the cast gate of gate bush 4 by above-mentioned injection nozzle 7 as polyacrylic molten resin, this resin flow is through runner 8, and fills injecting cavity 12 and eck mould 5 inside around inject cores 6, and this resin is filled the chamber 9 that is used for suspender.Therefore, the prefabricated component 10 in the bottom is connected and integrally formed (referring to Fig. 5) with the resin in the runner 8 with level and straight suspender 10a.

For the prefabricated component 10 with suspender 10a is taken out from mould, at first, by bed die being moved back into sidepiece and discharging this contact, the injection cavity of suspender 10a is formed on the bottom of injecting cavity 12 between

bed die

3,3 front surfaces.Then, transporting plate 51 against keep-uping pressure of

collapsible die

11,11 by move upward together this eck mould 5, inject cores 6 and rotation discharges.Therefore, collapsible die 11,11 promotes by the restoring force that is compressed

helical spring

24,24, and by

pilot pin

23,23 guiding, and each

collapsible die

11,11 is inclined upwardly and moves to original open position, and away from each other, and injecting cavity 12 is opened wide towards sidepiece along with inner conical surface in the opening 21.

Prefabricated component 10 and suspender 10a around inject cores 6 take out from the injection cavity between bed die 3,3 front surfaces, move upward with

collapsible die

11,11, separate up to the upper surface of eck mould 5 with collapsible die 11,11.As shown in Figure 6, after

collapsible die

11,11 reached limes superiors, prefabricated component 10 moved upward to the space of injecting cavity mould 1 top with eck mould 5 and inject cores 6.

As shown in Figure 7, injection-molded or with common stretch blow-molded similarly elementary molded after, transport plate 51 by rotation, discharge and take out prefabricated component 10 that the back keeps by eck mould 5 from injecting cavity mould as mentioned above 1 and be sent to space above the blowing mould 53 that comprises collapsible die 53a, 53a at inject cores.Transport moving downward of plate 51 by rotation, this prefabricated component 10 is inserted into and blows in the chamber 54, stretches by stretching bar 57 towards bed die 56, and by the air blow molding from blow cores 58, thereby form the container 20 that drips parenteral solution, wherein this bottom die is useful on the cavity 55 of suspender 10a.As Fig. 8 or shown in Figure 9, this container forms the level and the straight suspender of a pair of annular of symmetry on concave bottom.After moulding, the cast gate that stretches out from suspender 10a center is excised from neck.

Because this suspender 10a ensconces on the ring-shaped depression bottom, the suspender 10a in container 20 bottoms does not stretch out from base portion, and therefore, even if the bottom has suspender, container 20 also has self-supporting ability with common container as bottle.Like this, can solve and have against lower surface following problems vertically that form, that cover the conventional container of the folding suspender in the bottom, these problems for example are loss of stability or the decline by stretching out from the folding part of causing of folding part elastic recovery and supporting certainly.As shown in phantom in Figure 8, when container 20 was inverted use, a pair of ring can be bent upwards from lower surface.Because two rings all are suspended on the hook-like part, the intensity that therefore has a suspender 10a of a pair of ring has surpassed the intensity that on prefabricated component lower surface injection moulding has the suspender of a ring.

In addition, even embodiment illustrated in the accompanying drawings provides a pair of

collapsible die

11,11, be embedded in the situation of the jut of prefabricated component 10 than big and suspender 10a length for prefabricated component 10 diameters, this prefabricated component 10 and suspender 10a can take out from injecting cavity 12, thereby single mould block can be used as injecting cavity mould 1 (not shown).Like this, injection molding according to the present invention is not limited to use as shown in the figure a pair of collapsible die.

Reference number is described

1: injecting cavity mould 56: bed die

2: fixed die 57: the stretching bar

3: bed die

4: gate bush

5: eck mould

6: inject cores

7: injection nozzle

8: runner

9: the suspender chamber

10: suspender

11: collapsible die

11a: downward conical outer surface

11b: recess

12: injecting cavity

12a: half chamber

12b: bottom die face

13: bullport

20: container

21: opening

22: recess

51: plate is transported in rotation

52: keeper

53: blowing mould

53a: collapsible die

54: blow the chamber

55: admit recess

Claims

1. injection mould that is used for having in the bottom prefabricated component of suspender comprises:

Eck mould;

Can close to form the injecting cavity mould in prefabricated component main part chamber with described eck mould;

Pass the inject cores that is positioned at the chamber of described eck mould;

The pair of plate-shaped bed die, described bed die has the front surface that contacts with each other, and movable so that open and close below the injecting cavity mould, and the last contact-making surface of bed die forms the mould surface of prefabricated component bottom, and forms runner between the bed die contact-making surface;

Gate bush with the straight end face that contacts with contact-making surface under the bed die; And

The chamber that is used for suspender, described chamber level are formed under gate bush end face and the bed die between the contact-making surface.

2. injection mould that is used for having in the bottom prefabricated component of suspender comprises:

To removable injecting cavity mould, it has downward tapered outer surface;

Fixed die, it has the injecting cavity mould and is embedded into wherein open interior, and the inner surface of described opening is against each other, and is and tapered and parallel with the tapered downwards outer surface of injecting cavity mould;

The a pair of tabular bed die that inserts from the fixed die sidepiece, its front surface contacts with each other, and be moveable in the fixed die open bottom and open and close the position, wherein the last contact-making surface of bed die forms the mould surface bottom the prefabricated component, and forms runner between the bed die contact-making surface;

Gate bush is positioned at described fixed die lower central, and has the straight upper surface that contacts with contact-making surface under the bed die;

The chamber that is used for suspender, described chamber level are formed under the end face of gate bush and the bed die between the contact-making surface;

Be parallel to a plurality of pilot pins in the outside that conical surface extend into open bottom and bed die obliquely; And

Helical spring around the pilot pin installation; Wherein,

Described pilot pin passes collapsible die and inserts reinforcing, and the injecting cavity mould utilizes elastic compression to install, and movable to open and close in opening.

3. prefabricated component that form by claim 1 or 2 described injection moulds, have suspender at its lower surface, wherein, described prefabricated component has the main part that forms by the injecting cavity mould, the bottom that forms by bed die, and with lower surface integrally formed horizontally suspend part, wherein via the Connection Element that forms in runner, described suspender is formed under the end face of gate bush and the bed die in the chamber that is used for suspender between the contact-making surface.

4. according to claim 3 have the prefabricated component of suspender at lower surface, and the length of wherein said suspender is bigger than the diameter of prefabricated component, and described suspender comprise a pair of can be from the upwards folding symmetrical ring of base portion.

One kind by in blowing mould to carrying out the container that stretch blow-molded forms according to claim 3 or the 4 described prefabricated components that have suspender in the bottom.