CN100369734C

CN100369734C - Method for operating injection molding apparatus

Info

Publication number: CN100369734C
Application number: CNB038015242A
Authority: CN
Inventors: 汤浅明博; 大岩冬树
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2002-03-29
Filing date: 2003-03-10
Publication date: 2008-02-20
Anticipated expiration: 2023-03-10
Also published as: CA2467432A1; GB2396839B; CN1592677A; GB0409753D0; GB2396839A; JP2003291186A; KR20040093662A; WO2003082544A1

Abstract

There is provided a method for operating an injection molding apparatus (10) including a stationary mold (15), a movable mold (16) for cooperating with the stationary mold (15) to produce a molded product (35), an ejector pin (19) mounted within the movable mold (16), and a product removing arm (31) for taking out the molded product (35). The arm (31) starts to move towards a space (S) between the molds (15, 16) while the movable mold (16) is opened. During the movement of the arm (31), the pin (19) begins advancing to eject the product (35). The arm (31) holds the ejected product (35) within the space (S). The pin (19) is then retracted. The arm (31) holding the product (35) starts to move away from within the space(S) by the time the pin (19) completes the retracting operation.

Description

The method of operation Coinjection molding apparatus

Technical field

The present invention relates generally to a kind of method of operating Coinjection molding apparatus, especially relate to a kind of method that moulded product is taken out from the die assembly of this device.

Background technology

Fig. 8 shows traditional Coinjection molding apparatus 100.This device 100 comprises die assembly 101.This die assembly 101 has fixed mould 102 and removable mould 103.This device 100 also comprises: injection device 104 is used for resin is injected in the cavity (not marking) that is limited jointly by mould 102,103; And removal device 105, be used for from die assembly 101, removing molded product.Device 105 has the chuck 106 of clamping moulded product.This Coinjection molding apparatus 100 of operation as described below.

After this cavity filled up resin, removable mould 103 is displacement S1 backward, thereby opened die assembly 101.It should be noted that the die assembly 101 regardless of which kind of type, this all will keep constant apart from S1.Along with die assembly 101 is shown in an open position, device 105 descends as shown by arrow A like that, opens chuck 106 then.Afterwards, the device 105 that has a chuck of opening 106 advances or moves towards moulded resin products 107, as shown by arrow B.Subsequently, the jemmies 108 that are arranged in the mould 103 are advanced or protrude, so that product 107 is pushed in the chuck of opening 106.Close chuck 106 then to catch product 107.

Withdrawal jemmy 108, make afterwards have be clamped in the product 107 in the chuck 106 device 105 towards fixed mould 102 withdrawals or move, as shown in Figure 9.At last, as shown by arrow C, device 105 is elevated to the home position of representing with double dot dash line.

Use the timetable shown in Figure 10 that the order of the aforesaid operations of device 100 is described in detail in detail below.

Make the opening operation of removable mould 103 reach the state of " opening (ON) " in time T 1, in other words, removable mould 103 beginnings are moved backward.In time T 2, the opening operation of mould 103 the is reached state of " close (OFF) ".In other words, mould 103 finishes its moving backward.In time T 2, make the step-down operation of device 105 reach "open" state.This means that device 105 begins to descend.In time T 3, make the step-down operation of device 105 reach "off" state, promptly the former finishes in operation.In time T 3, make the opening operation of chuck 106 reach "open" state.In this state, chuck 106 begins to open.In time T 4, chuck 106 is finished its opening operation.That is, this opening operation reaches "off" state.In time T 4, the forward operation of device 105 is in "off" state.In other words, device 105 beginnings are advanced or are moved towards product 107.In time T 5, the forward operation of device 105 reaches "off" state, perhaps makes the former operate termination.In time T 5, jemmy 108 begins to advance or protrude.In other words, make the forward operation of jemmy 108 reach "open" state.In time T 6, make the forward operation of jemmy 108 be in "off" state, the former is operated finish.In time T 6, make the shutoff operation of chuck 106 reach "open" state, promptly chuck 106 begins to close.In time T 7, make the shutoff operation of chuck 106 be in "off" state, it is finished.In time T 7, make the retraction operation of jemmy 108 reach "open" state.In other words, begin withdrawal at time T 7 jemmies 108.In time T 8, the retraction operation of jemmy 108 finishes or is in "off" state.In time T 8, device 105 beginnings are moved backward towards fixed mould 102, and finish this moving backward in time T 9.That is, make the retraction operation of device 105 reach "open" state, reach "off" state in time T 9 then in time T 8.Then, begin to rise at time T 9 devices 105.In other words, lift operations is in "open" state on time T 9 devices 105.In time T 10, the last lift operations of device 105 is finished, and perhaps reaches "off" state.Need moulded product 107 be taken out from die assembly 101 in a period of time between time T 1 and the time T 10.Below such a period of time is called " fetch cycle S0 ".Carry out above-mentioned each operation in order, so that from die assembly 101, take out moulded product 107.

Use the device of arranging like this 100, can make molded product reliably with good quality.Yet this moulded product seldom can take out from die assembly 101 effectively.In order to take out product efficiently, can advise: carry out each operation quickly, to shorten fetch cycle S0.Yet, second-rate by the molded product that so fast operation is taken out.So have such needs, that is: shorten the fetch cycle, and needn't carry out each operation apace, thereby efficiently molded product is taken out from die assembly.

Summary of the invention

The purpose of this invention is to provide a kind of method of operating Coinjection molding apparatus, this device was designed to be able to take out moulded product from this device in the time that shortens.

According to an aspect of the present invention, provide a kind of method of operating Coinjection molding apparatus, this Coinjection molding apparatus comprises: fixed mould; Removable mould, be used for described fixed mould acting in conjunction to make moulded product; Be contained in the jemmy in the described removable mould; Be used for taking out the product taking-up support arm of product from described Coinjection molding apparatus; And be installed in described product and take out chuck on the support arm, be used to open and close operation to receive and to keep described product, the method comprising the steps of: move this removable mould towards open position with this product, this product keeps contacting with the tight of this jemmy; Before this removable mould arrived open position, the another location of the reception product in the space that is being limited between this fixed mould and the removable mould was moved this product and is taken out support arm; Take out before support arm arrives described another location in this space between described fixed mould and described removable mould at this product, described chuck is begun and finish its opening operation; Then, described jemmy is advanced to release described product, the time that wherein said jemmy begins to advance is taken out the time that support arm arrives the described another location in the described space early than described product, and described jemmy time of finishing its motion is later than described product and takes out the time that support arm arrives described another location; Afterwards, in described space, described chuck is closed described product is remained on described product take out on the support arm; Subsequently, move this jemmy towards retracted position; And before this jemmy arrives described retracted position, begin that this product is taken out support arm and shift out described space.

Moved at removable mould before the time of open position, support arm begins to move towards this space.In other words, can earlier begin moving of support arm.

In the moving process of support arm, begin to release product.This means and earlier to begin moving forward of jemmy.

Before jemmy moved to retracted position, this support arm began to shift out this space.Promptly can earlier begin the support arm that product in mobile clamping.

These actions of support arm and jemmy make that shortening the taking-up required time period of this product becomes possibility.

This removable mould preferably moves past a segment distance and moves to open position, and the size of product is depended in the setting of this distance.

The size of this product is meant: with the direction of support arm moving direction traversed by on, the amount that product is deepened.Size as fruit product is less, and so removable mould is opened less distance.This makes that making within a short period of time removable mould move to open position becomes possibility.Removable mould moves small distance and allows this support arm earlier to begin to move.

Description of drawings

Fig. 1 is the schematic diagram that expression has the die assembly in the closed position and the Coinjection molding apparatus of the product withdrawing device that is in uppermost position;

Fig. 2 is similar to Fig. 1, except die assembly moves and the product withdrawing device begins from uppermost position to descend towards open position;

Fig. 3 is similar to Fig. 2, except die assembly is shown in an open position, the product withdrawing device further reduces, the jemmy of die assembly begins to advance and the chuck of product withdrawing device is shown in an open position;

Fig. 4 is similar to Fig. 3, except the product withdrawing device is in bottom position, jemmy is in progressive position so that molded product is pushed the chuck of opening;

Fig. 5 is similar to Fig. 4, the chuck of moulded product except closing clamping;

Fig. 6 is similar to Fig. 5, except the product withdrawing device begins from bottom position towards uppermost position rising and withdrawal jemmy;

Fig. 7 is the time chart that the operating sequence of the Coinjection molding apparatus that moulded product is taken out therefrom is described;

Fig. 8 is the schematic diagram that expression has traditional Coinjection molding apparatus of die assembly that is shown in an open position and the product withdrawing device of preparing decline;

Fig. 9 is similar to Fig. 8, moulded product except the clamping of product withdrawing device and begins the rising;

Figure 10 illustrates the time chart of the operating sequence of traditional Coinjection molding apparatus that moulded product is taken out therefrom.

The specific embodiment

With reference to figure 1, the Coinjection molding apparatus 10 that drawn, it comprises: injection device 11, clamp mechanism 12, and the control device (not shown) of control injection device 11 and clamping device 12.Has die assembly 13 in this clamp mechanism 12.This device 10 also comprises the product withdrawing device 14 that is arranged on the clamp mechanism 12.Such as will be described, device 14 can vertically move.

Die assembly 13 comprises fixed mould 15 and removable mould 16, and removable mould can move into or the engaging of disengagement and fixed mould 15.As will be described later in detail, removable mould 16 can move along the horizontal direction with device 14 the direction traversed by that moves both vertically.Removable mould 16 comprises the ejecting device 17 with cylinder 18 and jemmy 19.This cylinder 18 is contained in the removable mould 16.Such as will be described, by cylinder 18 jemmy 19 is moved between progressive position and retracted position.Mould 16 has release surface 21.

Clamp mechanism 12 has: fixation clip 23, and it has and connects connecting

rod

24,24 thereon; And displacable platen 25, it is contained on the connecting

rod

24,24 slidably.Shown in arrow a1, thereby displacable platen 25 slips make removable mould 16 move to the closed position.In the closed position, removable mould 16 is in pinch engagement by setting pressure and the fixed mould 15 that applies thereon.Displacable platen 25 also slides backward a distance or amount (below be called " opening ") Sm, shown in arrow a2, arrives the open position of representing with double dot dash line.So just make removable mould 16 move backward to retracted position or open position.At open position, this mould 16 breaks away from the pinch engagement state with mould 15.

Size L according to moulded product 35 (see figure 2)s sets opening Sm, and

mould

15,16 produces in cooperation with this result.In detail, set the opening Sm that removable mould 16 moves backward like this, that is: product withdrawing device 14 takes out moulded product 35 from clamp mechanism 12 or die assembly 13, and can not interfere with the release surface 21 of mould 15.

As used herein, the size of moulded product 35 refers to: with the direction of device 14 the direction traversed by that moves both vertically on, the amount L that product 35 is deepened.This amount L depends on the structure of product 35.Should be understood that just as opening Sm, set amount or the distance that removable mould 16 moves to open position according to the size of product 35.

Product withdrawing device 14 comprises: product takes out support arm 31, and it is used for product 35 is taken out from clamp mechanism 12 or die assembly 13; Be contained in the chuck 32 on the support arm 31; And the control device (not shown) that is used for controlling support arm 31 and chuck 32.Be in topmost or ready position at device shown in Fig. 1 14 or support arm 31, it is positioned on this clamp mechanism 12 or the die assembly 13.

Describe below and how operate this Coinjection molding apparatus 10 according to the present invention.

At first, fill die assembly 13 with resin with the removable mould 16 that is maintained in its closed position.In detail, use injection device 11 makes the resin material fusing or bears plastication.Then, install the 11 specified rate resins that will melt like this and inject die assembly 13.Then, resin is remained on continue a preset time in the die assembly 13 at interval, removable afterwards mould 16 begins to move back towards the opened position, shown in arrow a2.

Referring now to Fig. 2,, support arm 31 begins to descend from uppermost position, and shown in arrow a3, thereby the former enters the space S that is limited between fixed mould 15 and the removable mould 16, and this removable mould just moves back towards the opened position.In detail, arrived that displacable platen 25 is opened or the time of mobile opening Sm, for example, when pressing plate 25 moved less than a distance measuring Sm or measures Ss, support arm 31 was moved down into and is located immediately under the uppermost position and a position of approaching removable mould 16.Should be understood that support arm 31 begins to descend before removable mould 16 arrives open position.Keep contacting with removable mould 16 or the tight of jemmy 19, molded product 35 moves away from fixed mould 15 with removable mould 16.

According to describing the relation of fixing time really, can realize of the step-down operation of removable mould 16, thereby support arm 31 enters space S, and can not interfere with mould 16 and product 35 towards the mobile backward and support arm 31 of open position with reference to figure 7.In an illustrated embodiment, support arm 31 is designed to like this, thereby that is: after 16 withdrawals of removable mould provide space S, support arm 31 begins to enter space S.

As shown in Figure 3, when support arm 31 moves down, beginning launch mode manufactured goods 35.At this moment, removable mould 16 is in withdrawal or open position.In detail, when support arm 31 descended, chuck 32 began like that shown in arrow a4 and finishes its opening operation, and cylinder 18 actions, thereby jemmy 19 beginnings are advanced shown in arrow a5 like that.This makes molded product 35 move away from the surface 21 of removable mould 16.In an illustrated embodiment, the opening operation of chuck 32 finishes, and jemmy 19 begins to advance afterwards.

As shown in Figure 4, support arm 31 further moves down and arrives the bottom position that is positioned at space S.Afterwards, jemmy 19 finishes it along the advancing or protrudes of arrow a6 direction, thereby away from removable mould 16 release products 35.

As shown in Figure 5, support arm 31 is caught product 35 in space S.In detail, chuck 32 is closed, thereby product 35 is remained in the space S.Then, cylinder 18 moves by this way, that is: jemmy 19 beginnings are withdrawn shown in arrow a7 like that.

As shown in Figure 6, when jemmy 19 was withdrawn shown in arrow a7 like that, support arm 31 beginnings were risen shown in arrow a8.In detail, support arm 31 has caught the bottom position of product 35 to move vertically upward in space S or from support arm 31.Support arm 31 upwards arrives original ready position or the uppermost position (see figure 1) that is located immediately on the bottom position.Support arm 31 arrives ready position and has just finished the once-through operation that product 35 takes out from die assembly 13.This means: finished the once taking-up of product 35.In order further to take out another molded product, removable mould 16 beginnings move to the closed position with aforementioned manner, arrive open position then, re-execute the operation separately of support arm 31, chuck 32 and jemmy 19 afterwards according to previously described order.It should be noted that for following operation, make the support arm 31 that moves backward to ready position arrive the given position that product 35 is discharged from support arm 31.

Be described below with reference to the timetable of Fig. 7 aforesaid operations with regard to Coinjection molding apparatus 10.

Begin to open at time K1 die assembly 13.That is, at time K1, removable mould 16 begins to move back towards the opened position.At time K1, the opening operation of this die assembly 13 is in "open" state.In a period of time from time K1 to time K2, die assembly 13 keeps carrying out opening operation.At time K2, make the opening operation of this die assembly 13 reach "off" state, it is finished.Obviously, be shown in an open position at the removable mould 16 of time K2.

In the opening operation process of die assembly 13, the time H1 between time K1 and time K2 just, support arm 31 begin to descend from the bottom position of uppermost position in space S, and this space S is formed between fixed mould 15 and the removable mould 16.This means:, make the step-down operation of support arm 31 reach "open" state in time T 1.As will be discussed later in detail, in time T 2, make the step-down operation of support arm 31 reach "off" state.

In the step-down operation of support arm 31,, make the opening operation of chuck 32 reach "open" state promptly at time C1.In other words, at time C1, the opening operation of die assembly 13 finishes, and chuck 32 begins to open afterwards.At time C2, the opening operation of chuck 32 is in "off" state, and it is finished.That is: at time C2, chuck 32 is shown in an open position.

Therefore, in the step-down operation of support arm 31, make chuck 32 arrive open position from the closed position.Along with chuck 32 is shown in an open position, make the forward operation of jemmy 19 arrive "open" state at time P1.In other words, after chuck 32 is opened, begin to advance or protrude at time P1 jemmy 19.As the timetable of Fig. 7 can be seen, before support arm 31 arrived the time H2 of the bottom position in the space S, jemmy 19 began to advance.Make the forward operation of jemmy 19 reach "off" state at time P2.This means: after support arm 31 arrived bottom position, jemmy 19 was finished forward operation.At time P2, jemmy 19 is in progressive position, so that product 35 pushed the chuck of opening 32.

At time C3, chuck 32 substantially side by side begins to close with the forward operation of finishing jemmy 19.In other words, make the shutoff operation of chuck 32 reach "open" state at time C3.At time C4, the shutoff operation of chuck 32 is finished, and perhaps makes it be in "off" state, thereby catches molded product 35 in space S.

At time P3, jemmy 19 substantially side by side begins withdrawal with the shutoff operation of finishing chuck 32.In other words, make the retraction operation of jemmy 19 reach "open" state at time P3.To a period of time of P4, jemmy 19 moves to retracted position from progressive position through the time P3 that associates.Make at time P4 jemmy 19 retraction operation reach "off" state.

In the retraction operation process of jemmy 19, the last lift operations of beginning support arm 31 perhaps makes the last lift operations of support arm 31 be in "open" state.In detail, the time H3 between time P3 and time P4, support arm 31 begin to rise.At time H4, make the last lift operations of support arm 31 reach "off" state or it is finished.In other words, arrive uppermost position at time H4 support arm 31.It should be noted that before jemmy 19 arrives retracted positions the bottom position that support arm 31 begins in the space S rises.

Take out a period of time that products 35 need be from time K1 to time H4 in the die assembly 13.That is, a period of time and aforesaid fetch cycle S0 similar " fetch cycle " Sn like this.It is short that this fetch cycle ratio relates to the described fetch cycle S0 of Figure 10.

The product that is used in the device 14 in the method for operation Coinjection molding apparatus 10 takes out support arm 31 than take out support arm with the product that formerly relates to the device 105 in the conventional method that Fig. 8 describes to Figure 10 more Zao begins decline.In support arm 31 decline processes during this period of time in, opening operation is also finished in chuck 32 beginning.Equally during this period of time, jemmy 19 begins to advance or protrude.This means: jemmy 19 is than beginning to advance in that the jemmy 108 shown in Fig. 8 and Fig. 9 is more Zao.In addition, the support arm of support arm 31 ratio devices 105 of device 14 more early begins to rise.This makes shortening taking-up needed a period of time of product from die assembly become possibility.Promptly shortened the fetch cycle.

Product takes out support arm 31 and can only move vertically downward to catch molded product 35.In other words, it is such to be unlike in the Coinjection molding apparatus of finding among Fig. 8 and Fig. 9, and support arm 31 needn't advance or from the withdrawal of product 35 there towards product 35.Therefore, this fetch cycle, Sn just shortened a period of time, that is: need in addition towards or move the required time away from moulded product.

According to the size of product 35, opening Sm can set lessly.This will cause shortening between time K1 and time K2 during this period of time, and during this period of time die assembly 13 is opened.Shorten and allow support arm 31 before time H1, to begin to descend during this period of time.Cause shorter fetch cycle Sn thus.

The Coinjection molding apparatus 10 that comprises product withdrawing device 14 and die assembly 13 only is an exemplary example, and can be arranged to multiple other forms to bring into play aforesaid effect.

Can come each action of control device 10 with multiple mode.For example, device 10 can comprise sensor, timer or their combination, thereby execution or beginning is provided and finishes above-mentioned each operation information necessary.

Industrial applicibility

The inventive method of operating injection molding apparatus comprises three following key steps, that is: (1) At removable mold movement in the process of open position, towards being limited to fixed mould and removable Space mobile product between the mould takes out support arm; (2) mistake that moves towards this space at this support arm In the journey, jemmy advances to release this product; (3) during jemmy was retracted, this support arm was from this Shift out in the space. Provide these three steps so that the shortening taking-up required time period of this molded product becomes May. In addition, in the littler situation of product size, can make opening that removable support arm opens Quantitative change is little. Like this, removable support arm moves to the time that open position need to shorten. Therefore, prop up Arm can earlier begin mobile. Cause thus further shortening take out this moulded product required the time Between the section. Therefore, method of the present invention is particularly useful in the injection moulding field.

Claims

One kind the operation Coinjection molding apparatus (10) method, this Coinjection molding apparatus comprises: fixed mould (15); Removable mould (16), be used for described fixed mould acting in conjunction to make moulded product (35); Be contained in the jemmy (19) in the described removable mould; Be used for taking out the product taking-up support arm (31) of product from described Coinjection molding apparatus; And be installed in described product and take out chuck (32) on the support arm, being used to open and close operation to receive and to keep described product, this method may further comprise the steps:

Move described removable mould (16) towards open position with this product (35), this product keeps tight contact the with described jemmy (19);

Before described removable mould (16) arrives open position, move described product towards the another location that is positioned at the reception product that is limited to the space (S) between described fixed mould (15) and the described removable mould (16) and take out support arm (31);

Described product take out support arm (31) arrive be positioned at the described another location in the space (S) between described fixed mould (15) and the described removable mould (16) before, described chuck (32) begun and finish its opening operation;

Then, described jemmy (19) is advanced to release described product (35), the time that wherein said jemmy begins to advance is taken out the time that support arm (31) arrives the described another location in the described space early than described product, and the time that described jemmy finishes its motion is later than the time that described product taking-up support arm arrives described another location;

Afterwards, in described space (S), described chuck (32) is closed described product (35) is remained on described product take out on the support arm (31);

Subsequently, move described jemmy (19) towards retracted position; And before described jemmy (19) arrives described retracted position, begin that described product is taken out support arm (31) and shift out described space (S).
2. the method for operation Coinjection molding apparatus according to claim 1 is characterized in that, described removable mould (16) moves past a segment distance and arrives open position, and the size of described product (35) is depended in the setting of this segment distance.