CN210705846U - Precise worm multi-cavity linkage demolding injection mold - Google Patents

Abstract

The utility model relates to an accurate worm multicavity room linkage drawing of patterns type injection mold, include: the worm molding device comprises an upper die and a lower die, wherein a plurality of movable inserts for molding a worm are arranged between the upper die and the lower die, molding die cavities are arranged in the movable inserts, injection molding material heads matched with the movable inserts and used for injecting plastic are arranged on the upper die, a top hole is formed in the bottom of the lower die, and an ejection cavity communicated with the top hole is arranged in the lower die; a linkage mechanism, the linkage mechanism comprising: the driving mechanism comprises a driving screw rod, a screw rod seat, a driving gear, a driving sleeve and a linkage gear set which is borne on the driving sleeve and is in meshing transmission with the driving gear; and, a demolding mechanism, the demolding mechanism comprising: the ejector comprises a top plate, an ejector pin and an ejector sleeve. Because the motor control is not needed during demoulding, the threads of the worms are synchronously screwed out in the process of separating the upper die, the demoulding precision is improved, the demoulding of a plurality of worms can be synchronously realized, and the demoulding efficiency is improved.

Description

Precision worm multi-chamber linkage release mold injection mold

technical field

The utility model relates to the technical field of injection moulds, in particular to a precision worm multi-chamber linkage release injection mould.

Background technique

As shown in Figure 1, the worm used for telescopic camera lens, due to the small size of the product and high precision requirements, is not suitable for processing in the form of traditional upper and lower molds to form a molding cavity, because this molding method will Mold marks are left on the surface of the product, which affects the performance of the product. Therefore, it is necessary to use an integrated molding cavity for injection molding. When demolding, the worm core needs to be rotated to release the product. The current demolding method is usually driven by a motor. The method drives the worm core to rotate, which cannot meet the requirements of high precision.

Utility model content

In order to solve the above technical problems, the utility model provides a precision worm multi-chamber linkage demoulding injection mold, which has the advantages of improving the demolding precision.

For achieving the above object, the technical scheme of the present utility model is as follows:

A precision worm multi-chamber linkage release injection mold, comprising:

Upper mold and lower mold, between the upper mold and the lower mold are several movable inserts for forming worms, the movable inserts are provided with a molding cavity, and the upper mold is provided with The movable insert is matched with a plastic injection head for injecting plastic, a top hole is opened at the bottom of the lower mold, and an ejection cavity communicated with the top hole is provided in the lower mold;

A linkage mechanism carried on the upper mold and used to drive the movable insert to disengage from the formed worm, the linkage mechanism includes: a driving screw rotatably assembled on the upper mold, clamped on the upper mold The screw seat is threadedly connected to the drive screw, the drive gear is fixed to the drive screw, the drive sleeve is rotatably assembled on the upper die and is slidably connected to the movable insert, and is carried on the the drive sleeve and the interlocking gear set for meshing and transmission with the drive gear; and,

A demolding mechanism carried on the lower die and used to eject the worm, the demolding mechanism comprising: a top plate slidably assembled on the lower die and located in the ejection cavity, a top plate carried on the lower die The ejector pin which extends into the molding die cavity for molding the inner cavity of the worm and restricts the rotation of the worm, and the ejector cylinder which is carried on the lower mold and is slidably sleeved on the ejector pin. The upper end face of the barrel is flush with the bottom of the worm.

To achieve the above technical solution, in the closed state, the molding cavity, the ejector pin and the ejector cylinder are jointly enclosed to form a space consistent with the worm, and plastic is injected into the molding cavity through the plastic injection head to form the product; when demolding, the upper The upward movement of the die drives the material head to separate from the movable insert, and then drives the screw base to move up. Since the screw base is threadedly connected with the driving cylinder, the driving screw will be driven to rotate synchronously during the rising process of the screw base. At this time, the driving screw The lever synchronously drives the drive gear to rotate, and drives the drive sleeve to rotate synchronously through the linkage gear set, thereby driving the movable insert and the worm to rotate relative to each other. Because the movable insert and the drive sleeve are slidably connected, the worm remains stationary under the restriction of the thimble. Therefore, in the process of rotation, the movable insert will move up synchronously until it is separated from the worm, and then the upper die and the lower die are separated, the top plate is moved by the oil cylinder, the worm is lifted up by the cylinder, and the worm is separated from the ejector pin. Molding process; since there is no need to use motor control during demoulding, the thread of the worm is synchronously unscrewed during the separation of the upper mold, which improves the demoulding accuracy, and can simultaneously realize the demoulding of multiple worms, which improves the demoulding efficiency.

As a preferred solution of the present invention, the upper mold comprises: a first template for driving the plastic injection head to move upward, a second template for driving the screw base to move upward, and a second template for driving the plastic injection head to move upward. For the third template that the linkage mechanism moves upward, the lead screw seat is clamped and fixed to the second template.

To realize the above technical solution, when the mold is opened, the first template is moved up to drive the plastic injection head to be separated from the movable insert, and then the second template is moved up to drive the screw seat to move up synchronously, so that the driving screw rotates, and the movable insert is in During the rotation process, it moves up and separates from the worm, and finally the third template moves up to separate the worm from the upper mold, and the worm can be ejected through the demoulding mechanism.

As a preferred solution of the present invention, the movable insert is located above the molding cavity and is provided with a pushing hole adapted to the plastic injection head, and the plastic injection head is provided with a push hole for pushing The pressing step of the movable insert.

By implementing the above technical solution, the plastic injection head can be combined with the movable insert with better sealing, and it is convenient to push the movable insert to reset.

As a preferred solution of the present invention, the interlocking gear set includes: a first interlocking gear fixed to each of the driving sleeves; A second linkage gear meshed with a linkage gear.

To achieve the above technical solution, the second linkage gear is used as an intermediate transmission member, so that the synchronous rotation of the drive gear and the first linkage gear is realized, and the arrangement space of the plurality of movable inserts is larger.

As a preferred solution of the present invention, the drive sleeve includes: a transmission shaft rotatably connected to the upper die, and a ball guide sleeve fixed in the inner cavity of the transmission shaft, the movable insert and the ball Guide bush sliding connection.

To achieve the above technical solution, the ball guide sleeve is connected with the movable insert, so that the fixed movable insert can rotate synchronously with the transmission shaft, and is driven upward by the thread of the worm until the movable insert is disengaged from the worm.

As a preferred solution of the present invention, a prism is provided on the upper part of the thimble located at the lower part of the worm.

To achieve the above technical solution, the worm is restricted by the prism, so that the worm remains in a static state during the rotation of the movable insert.

As a preferred solution of the present invention, the movable inserts are provided with two sets of symmetrically arranged movable inserts, each group of movable inserts includes two parallelly arranged ones, and two of the second linkage gears are symmetrically arranged, each of which is arranged symmetrically. The second linkage gear meshes with the two movable inserts of the same group.

To sum up, the utility model has the following beneficial effects:

In the clamping state, the molding cavity, the ejector pin and the ejector cylinder are enclosed together to form a space consistent with the worm, and plastic is injected into the molding cavity through the plastic injection head to form the product; when demoulding, the upper mold moves up to carry the material. The head is separated from the movable insert, and then drives the screw base to move up. Since the screw base is threadedly connected with the driving cylinder, the driving screw will be driven to rotate synchronously during the rising process of the screw base. At this time, the driving screw will drive the driving gear synchronously. It rotates, and drives the drive sleeve to rotate synchronously through the linkage gear set, thereby driving the movable insert and the worm to rotate relative to each other. During the process, the movable insert will move up synchronously until it is separated from the worm, then the upper die and the lower die are separated, the top plate is moved by the oil cylinder, the worm is lifted up by the cylinder, and the worm is separated from the ejector pin to complete the demoulding process; There is no need to use motor control during demoulding, and the thread of the worm can be synchronously unscrewed during the separation of the upper die, which improves the demoulding accuracy, and can simultaneously realize the demoulding of multiple worms, which improves the demoulding efficiency.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a worm to be processed in the present invention.

FIG. 2 is a schematic structural diagram of an embodiment of the present invention.

FIG. 3 is an enlarged view of part A of FIG. 2 .

4 is a schematic structural diagram of a linkage mechanism in an embodiment of the present invention.

5 is a cross-sectional view of the linkage mechanism in the embodiment of the present invention.

Corresponding part names represented by numbers and letters in the figure:

1. Upper mold; 11. Plastic injection head; 111. Pressing step; 12. First template; 13. Second template; 14. Third template; 2. Lower mold; 21. Top hole; 22. Ejection cavity ;3, movable inserts; 31, molding cavity; 32, push hole; 4, linkage mechanism; 41, drive screw; 42, screw seat; 43, drive gear; 44, drive sleeve; 441, drive shaft ;442, ball guide bush; 45, linkage gear set; 451, first linkage gear; 452, second linkage gear; 5, demoulding mechanism; 51, top plate; 52, thimble; 521, prism; 53, ejector cylinder.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example

A precision worm multi-chamber linkage demolding injection mold, as shown in Figures 2 to 4, includes: an upper mold 1 and a lower mold 2, and between the upper mold 1 and the lower mold 2, there are several movable parts for forming worms. Insert 3, the movable insert 3 is provided with a molding cavity 31, and the upper mold 1 is provided with an injection plastic head 11 for injecting plastic in cooperation with the movable insert 3, and the bottom of the lower mold 2 is provided with a top hole 21 , and the lower mold 2 is provided with an ejection cavity 22 that communicates with the top hole 21; the linkage mechanism 4 is carried on the upper mold 1 for driving the movable insert 3 to disengage from the worm that has been formed; and, it is carried on the lower mold 2 . Demoulding mechanism 5 for ejecting the worm.

Specifically, the linkage mechanism 4 includes: a driving screw 41 rotatably assembled on the upper die 1 , a screw seat 42 clamped to the upper die 1 and threadedly connected to the driving screw 41 , and a driving gear fixed to the driving screw 41 . 43. The drive sleeve 44 rotatably assembled on the upper die 1 and slidably connected to the movable insert 3 , and the linkage gear set 45 carried on the drive sleeve 44 and engaged with the drive gear 43 for transmission.

The upper die 1 includes: a first die plate 12 for driving the plastic injection head 11 to move upward, a second die plate 13 for driving the screw base 42 to move upward, and a third die plate 14 for driving the linkage mechanism 4 to move upward, The plastic injection head 11 is locked and fixed to the first mold plate 12, and the screw base 42 is inserted and fixed to the second mold plate.

The drive sleeve 44 includes: a transmission shaft 441 rotatably connected to the upper die 1, and a ball guide sleeve 442 fixed to the inner cavity of the transmission shaft 441. The movable insert 3 is slidably connected to the ball guide sleeve 442, and is connected to the movable insert through the ball guide sleeve 442. 3 is connected, so that the fixed movable insert 3 can rotate synchronously with the transmission shaft 441 and is driven upward by the thread of the worm until the movable insert 3 is disengaged from the worm.

At the same time, a pushing hole 32 that is adapted to the plastic injection head 11 is provided on the movable insert above the molding cavity 31 , and the plastic injection head 11 is provided with a pressing step 111 for pushing against the movable insert 3 , so that The plastic injection head 11 can be combined with the movable insert 3 to have better sealing performance, and it is convenient to push the movable insert 3 to reset.

The interlocking gear set 45 includes: a first interlocking gear 451 fixed to each driving sleeve 44; The linkage gear 451 is sleeved and fixed on the transmission shaft 441, and the second linkage gear 452 is used as an intermediate transmission member to realize the synchronous rotation of the drive gear 43 and the first linkage gear 451, and make the arrangement space of the plurality of movable inserts 3 more compact. In this embodiment, the movable inserts 3 are provided with two groups of symmetrically arranged, each group of movable inserts 3 includes two arranged in parallel, and two of the second linkage gears 452 are symmetrically arranged, and each of the second linkage gears 452 All meshing with the two movable inserts 3 of the same group, the dimensions of the drive gear 43 , the first interlocking gear 451 and the second interlocking gear 452 are all specifically determined according to the dimensions of the worm.

The demolding mechanism 5 includes: a top plate 51 slidably assembled to the lower mold 2 and located in the ejection cavity 22 , an ejector pin carried on the lower mold 2 and extending into the molding cavity 31 for molding the inner cavity of the worm and restricting the rotation of the worm 52, and, bearing on the lower die 2 and slidingly sleeved on the ejector cylinder 53 of the ejector pin 52, the upper end face of the ejector barrel 53 is flush with the bottom of the worm; The prism 521, correspondingly, forms a prism hole in the lower part of the inner cavity of the worm, and the worm is restricted by the prism 521, so that the worm remains in a static state during the rotation of the movable insert 3.

In the mold clamping state, the molding cavity 31, the ejector pin 52 and the ejector cylinder 53 are jointly enclosed to form a space consistent with the worm, and plastic is injected into the molding cavity 31 through the plastic injection head 11 to form the product; when demolding, firstly. The first template 12 is moved upward to drive the plastic injection head 11 to separate from the movable insert 3, that is, the parting surface of PL1 in FIG. 1 is separated, and then the second template 13 is moved upward to drive the screw base 42 to move upward synchronously, that is, PL2 in FIG. 1 . The parting surfaces are separated. Since the screw seat 42 is threadedly connected to the driving cylinder, the driving screw 41 will be driven to rotate synchronously during the rising process of the screw seat 42. At this time, the driving screw 41 will simultaneously drive the driving gear 43 to rotate, and pass the The linkage gear set 45 drives the drive sleeve 44 to rotate synchronously, and then drives the movable insert 3 to rotate relative to the worm. Since the movable insert 3 is slidably connected to the drive sleeve 44, the worm remains stationary under the restriction of the ejector pin 52. During the rotation, the movable insert 3 will move up synchronously until it is separated from the worm. Finally, the third template 14 moves up to separate the upper mold 1 and the lower mold 2, that is, the parting surface of PL3 in Fig. 1 is separated, and the top plate 51 is driven by the oil cylinder. The worm is lifted up by the cylinder, and the worm is separated from the ejector pin 52 to complete the demoulding process; since there is no need to use motor control during demolding, the thread of the worm is synchronously realized during the separation process of the upper die 1, which improves the demoulding process. The mold accuracy is improved, and the demoulding of multiple worms can be realized simultaneously, which improves the demoulding efficiency.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. The utility model provides a precision worm multicavity room linkage drawing of patterns type injection mold which characterized in that includes:

the worm molding device comprises an upper die and a lower die, wherein a plurality of movable inserts for molding worms are arranged between the upper die and the lower die, molding die cavities are arranged in the movable inserts, injection molding material heads matched with the movable inserts and used for injecting plastic are arranged on the upper die, a top hole is formed in the bottom of the lower die, and an ejection cavity communicated with the top hole is arranged in the lower die;

bear in go up the mould and be used for the drive the link gear that the worm that movable mold insert and shaping were accomplished breaks away from, link gear includes: the movable insert is rotatably assembled on the upper die, and comprises a driving lead screw rotatably assembled on the upper die, a lead screw seat clamped on the upper die and in threaded connection with the driving lead screw, a driving gear fixed on the driving lead screw, a driving sleeve rotatably assembled on the upper die and in sliding connection with the movable insert, and a linkage gear set borne on the driving sleeve and in meshing transmission with the driving gear; and the number of the first and second groups,

bear in the lower mould, be used for ejecting demoulding mechanism with the worm, demoulding mechanism includes: the ejector mechanism comprises a lower die, an ejector pin, an ejector driver barrel and an ejector pin, wherein the ejector pin is slidably assembled on the lower die and located on a top plate in an ejection cavity, the ejector pin is borne on the lower die and extends into the molding cavity to form an inner cavity of a worm and limit the rotation of the worm, the ejector driver barrel is borne on the lower die and is slidably sleeved on the ejector pin, and the upper end face of the ejector driver barrel is flush with the bottom of the worm.

2. The precision worm multi-cavity linkage demolding type injection mold according to claim 1, wherein the upper mold comprises: the device comprises a first template for driving the plastic injection head to move upwards, a second template for driving the screw rod seat to move upwards and a third template for driving the linkage mechanism to move upwards, wherein the screw rod seat is fixedly clamped on the second template.

3. The precise worm multi-cavity linkage demolding type injection mold as claimed in claim 2, wherein the movable insert is provided with a pushing hole matched with the injection molding head above the molding mold cavity, and the injection molding head is provided with a pressing step for pushing the movable insert.

4. The precision worm multi-cavity linkage demolding type injection mold according to claim 3, wherein the linkage gear set includes: be fixed in each the first linkage gear of driving sleeve to and, the rotary type assemble in go up the mould and with drive gear with the second linkage gear that first linkage gear meshed mutually.

5. The precision worm multi-cavity linkage demolding type injection mold according to claim 4, wherein the driving sleeve comprises: the movable mold insert is connected with the ball guide sleeve in a sliding mode.

6. The precision worm multi-cavity linkage demolding type injection mold according to claim 5, wherein a prism is arranged on the lower portion, located on the worm, of the ejector pin.

7. The precision worm multi-cavity linkage demolding type injection mold according to claim 4, wherein the movable inserts are provided in two groups which are symmetrically arranged, each group of the movable inserts comprises two movable inserts which are arranged in parallel, the second linkage gears are symmetrically arranged in two, and each second linkage gear is meshed with two movable inserts of the same group.

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