CN112793088B

CN112793088B - Water cutting sealing strip injection mold

Info

Publication number: CN112793088B
Application number: CN202110370831.8A
Authority: CN
Inventors: 彭佩; 徐利永; 王才荣; 胡愉晟
Original assignee: Ningbo Fangzheng Tool Co Ltd
Current assignee: Ningbo Fangzheng Tool Co Ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-07-02
Anticipated expiration: 2041-04-07
Also published as: CN112793088A

Abstract

The utility model provides a sealing strip injection mold is cut to water, includes mould and lower mould, its characterized in that: the lower mould includes the upper fixed plate that the interval set up from top to bottom, the bottom plate, a curb plate for connecting the upper and lower fixed plate, still include a thimble board that sets up between the upper and lower fixed plate, and be used for driving the upper and lower drive arrangement of thimble board up-and-down motion, it has slider seat and lower mold core to inlay side by side about on the upper fixed plate, be equipped with one or more product positions that are used for holding product main part anterior segment on the lower mold core, it still is equipped with a straight kicking block that links to each other with the thimble board respectively to be located each product position department on the lower mold core, still be equipped with the stopper that can stretch out and draw back from top to bottom on the lower mold core, it can cover the first slider that closes on each product position to slide about on the slider seat to be equipped with on the last mould still, still be equipped. This sealing strip injection mold is cut to water simple structure and degree of automation are higher.

Description

Water cutting sealing strip injection mold

Technical Field

The invention relates to the technical field of molds, in particular to a water-cutting sealing strip injection mold.

Background

The existing water cut sealing strip installed on an automobile door is structurally shown in figure 1 and comprises a main body 1a formed by standard extrusion, a groove 3a is formed in one side of the main body 1a, and an injection molding part 2a is formed at the front end of the main body 1a through an injection mold. At present, the injection mold for the water cutting sealing strip has a very complex structure and low automation degree.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the utility model provides a sealing strip injection mold is cut to simple structure and higher water of degree of automation.

The technical solution of the invention is as follows: the utility model provides a sealing strip injection mold is cut to water, includes mould and lower mould, its characterized in that: the lower die comprises an upper fixing plate, a lower fixing plate, a side plate, an ejector plate, an upper driving device and a lower driving device, wherein the upper fixing plate and the lower fixing plate are arranged at an interval from top to bottom, the side plate is used for connecting the upper fixing plate and the lower fixing plate, the ejector plate is arranged between the upper fixing plate and the lower fixing plate, the upper driving device and the lower driving device are used for driving the ejector plate to move up and down, a slider seat and a lower die core are embedded in the upper fixing plate side by side from left to right, one or more product positions for accommodating the front section of a product main body are arranged on the lower die core, a straight ejector block connected with the ejector plate is further arranged on each product position on the lower die core respectively and used for being inserted into a groove on one side of the product main body and ejecting a product upwards after injection molding, a limiting block capable of automatically stretching upwards and downwards is further arranged on the lower die core and used for limiting the front, the upper die is further provided with inclined guide pillars for driving the first sliding blocks to slide left and right, the inclined guide pillars are used for enabling the first sliding blocks to move inwards when die assembly is carried out, forming an injection molding space with the front end of the product main body and enabling the first sliding blocks to move outwards when die assembly is carried out and separating injection molding parts, the outer sides of the sliding block seats are rotatably connected with the lower die, and the lower die is provided with a rotating device for driving the sliding block seats to rotate and used for driving the first sliding blocks to cover the product grade when die assembly is carried out and driving the first sliding blocks to open upwards when die assembly is carried out.

The operating principle of the injection mold for the water-cutting sealing strip is as follows:

when the product is injected and needs to be taken out, the mold is firstly opened, the first sliding block moves outwards under the driving of the inclined guide post, and the first sliding block is separated from the product on the product position; then the rotating device drives the sliding block seat to rotate, and the sliding block seat drives the first sliding block to be opened upwards; and finally, the straight ejector block ejects the product upwards under the driving of the ejector plate and the up-and-down driving device, and then the demoulding can be carried out. When injection molding is needed, the first sliding block is still opened upwards, the limiting block is driven to pop up upwards, and the straight top block is driven to fall back; then inserting the front section of the product main body into the product grade through a groove and a straight top block on the side surface until the front end of the product main body is abutted against a limiting block; then the rotating device is driven to enable the first sliding block to cover the product grade, and meanwhile the limiting block is driven to retract downwards; and finally, closing the mold, wherein the inclined guide post drives the first slide block to move inwards, and an injection molding space is formed between the first slide block and the front end of the product main body.

After adopting the structure, the invention has the following advantages:

when the injection mold for the water-cut sealing strip is used for injection molding, the limit block is used for locating the installation depth of a product main body, the first sliding block and the product main body form an injection molding space, the inclined guide post can enable the first sliding block to move and be separated from a product during demolding, and the rotating device can enable the first sliding block to rotate, so that the straight ejection block below the first sliding block can eject the product to enable the product to be demolded.

Preferably, the up-and-down driving device comprises an ejector piece connected with an up-and-down ejection mechanism of the injection molding machine, the end of the ejector piece is abutted against the bottom of the ejector plate, and a first compression spring is arranged between the ejector plate and the upper fixing plate. The ejector plate can be directly ejected upwards by using the ejection mechanism of the injection molding machine, so that the straight ejection block can eject the product upwards to be demolded, the ejection mechanism is not required to be additionally arranged, the mechanism is simpler, and the cost is lower; and after the injection molding machine falls back from the ejection mechanism and is separated from the ejector plate, the ejector plate falls back by utilizing the first compression spring between the ejector plate and the upper fixing plate, and the straight ejector block retracts.

Preferably, the rotating device comprises a fixed guide rail fixedly arranged on the lower die and close to one side of the sliding block seat, and an oil cylinder arranged on the fixed guide rail, wherein the fixed end of the oil cylinder is arranged on the outer side of the fixed guide rail, the free end of the oil cylinder extends into the fixed guide rail and is in sliding connection with the fixed guide rail through a second sliding block fixedly arranged on the free end, the fixed guide rail is provided with a first pivot, the second sliding block is provided with a second pivot, the second pivot is arranged above the first pivot, the first pivot is closer to the sliding block seat than the second pivot, the rotating device further comprises a first support, the first support comprises a horizontal plate and an inclined plate arranged on the horizontal plate, one side of the horizontal plate is connected with one side of the inclined plate, the included angle is an obtuse angle, the position where the horizontal plate is connected with the inclined plate is rotationally connected with the first pivot, and the side of the inclined plate is provided with a kidney-shaped through, the second pivot penetrates through the waist-shaped through groove and is used for enabling the second pivot to slide in the waist-shaped through groove when the oil cylinder stretches out and draws back left and right so as to drive the first support connected with the sliding block seat to rotate around the first pivot. The rotating device is simple and compact in structure and reliable in rotation.

Preferably, the side surface of the limiting block is provided with a first limiting groove and a second limiting groove at an upper-lower interval, and the lower die is provided with a first bolt positioned on the first limiting groove and the second limiting groove and used for positioning the limiting block at an extending position and a retracting position. The arrangement can ensure that the limiting block can be reliably positioned at the extending position and the retracting position.

Preferably, the lifting mechanism further comprises a second support arranged between the lower mold core and the ejector plate and used for installing a limiting block, a second spring bolt is further arranged at the free end of the oil cylinder and below the first support, the second spring bolt can extend into the space between the lower mold core and the second support under the driving of the oil cylinder, an inclined plane which is gradually retracted from top to bottom is arranged at one end, close to the second support, of the second spring bolt, a third limiting groove matched with the inclined plane of the second spring bolt is arranged on the second support, the ejector plate falls downwards and drives the second support and the limiting block thereon to be ejected upwards when the second spring bolt falls back from the top surface of the second support and the ejector plate is ejected upwards, until the inclined plane of the second spring bolt is clamped into the third limiting groove of the second support and the first spring bolt is clamped into the first limiting groove of the limiting block, the limiting block is in an extending state. Set up the second spring bolt on rotary mechanism, usable second spring bolt locks and unblock the stopper to can guarantee that the rotatory lid of first slider closes when on the product grade, the stopper is indentation downwards, and only when first slider upwards opens, just can make the stopper stretch out, and the inclined plane that sets up on the second spring bolt and the spacing recess of third that sets up on the second support, not only can make things convenient for stretching into and withdrawing from of second spring bolt, but also can assist first spring bolt to play limiting displacement.

Preferably, the lower die core is embedded with pressing blocks for pressing the product main body at two sides of each product grade, one end of one of the pressing blocks is provided with a limiting pin, the limiting pin passes through a positioning hole at one end of the pressing block and then is fixed on the lower mold core, the aperture of the positioning hole of the pressing block is larger than that of the limiting pin, the bottom of the other end of the pressing block is also provided with a first containing cavity, a second containing cavity is arranged on the lower mold core at a position corresponding to the first containing cavity, the first containing cavity and the second containing cavity form a space for installing a second compression spring, the inner walls of the first accommodating cavity and the second accommodating cavity are staggered to form a staggered step, a positioning block which is embedded on the lower mold core and abuts against the pressing block during mold closing is further arranged on the upper mold, the positioning block abuts against the pressing block during mold closing to enable the pressing block to compress a product, and the positioning block is released from limiting the pressing block during mold opening and drives the pressing block to move the stroke of the staggered step to separate the product. This setting can utilize the briquetting of left and right sides to play the clamping action to the product main part when the compound die to make the product main part can not retreat at the in-process of moulding plastics, and when the die sinking, will make one of them briquetting move away a section distance, thereby the product drawing of patterns after conveniently moulding plastics.

Preferably, the lower die further comprises a supporting seat for supporting the rear section of the product. This arrangement can make the product placement more stable.

Preferably, two product grades are arranged on the lower mold core. This arrangement takes into account both the complexity of the structure and the production efficiency.

Description of the drawings:

FIG. 1 is a schematic structural view of a water cut weather strip on a conventional automobile door;

FIG. 2 is a front view of the injection mold for water-cut sealing strip according to the present invention;

FIG. 3 is a side view of the injection mold for water-cut sealing strip according to the present invention;

FIG. 4 is a side view of the injection mold for water-cut sealing strips according to the present invention when the mold is opened;

FIG. 5 is a side view of the injection mold for water cut sealing tape according to the present invention, when rotated;

FIG. 6 is a side view of the injection mold for a water-cut sealing strip according to the present invention when ejected;

FIG. 7 is a three-dimensional structure view of the injection mold for water-cut sealing strips according to the present invention when the mold is opened;

FIG. 8 is another perspective view of the water cut sealing strip injection mold of the present invention after the upper mold is hidden when the mold is opened;

FIG. 9 is a perspective view of the water-cut sealing strip injection mold according to the present invention after the upper mold and the first slider are hidden when the mold is opened;

FIG. 10 is an enlarged view of a portion of FIG. 9 at A;

FIG. 11 is a schematic view showing the internal structure of the injection mold for a water cut sealing tape according to the present invention after a part of the components are hidden;

FIG. 12 is an enlarged partial view at B in FIG. 11;

FIG. 13 is a schematic view showing the internal structure of the water cut weatherstrip injection mold at another view after a part of the parts are hidden;

FIG. 14 is an enlarged partial schematic view at C of FIG. 13;

FIG. 15 is a schematic view showing the assembly of a pressing block and a lower die core of the injection mold for a water-cut sealing strip according to the present invention;

in the prior art figures: 1 a-main body, 2 a-injection molding, 3 a-groove;

in the figure of the invention: 1-upper mold, 2-lower mold, 3-upper fixing plate, 4-lower fixing plate, 5-side plate, 6-ejector plate, 7-up-down driving device, 8-slider seat, 9-lower mold core, 10-product body, 11-product grade, 12-straight ejector block, 13-stopper, 14-first slider, 15-angle guide, 16-injection molding, 17-rotating device, 18-ejector, 19-first compression spring, 20-fixed guide, 21-cylinder, 22-fixed end, 23-free end, 24-second slider, 25-first pivot, 26-second pivot, 27-first seat, 28-horizontal plate, 29-angle plate, 30-kidney-shaped through groove, 31-first limit groove, 32-a second limiting groove, 33-a first bolt, 34-a second support, 35-a second bolt, 36-an inclined plane, 37-a third limiting groove, 38-a pressing block, 39-a limiting pin, 40-a positioning hole, 41-a first accommodating cavity, 42-a second accommodating cavity, 43-a second compression spring, 44-a dislocation step, 45-a positioning block, 46-a support seat and 47-an upper and lower ejection mechanism of the injection molding machine.

Detailed Description

The invention is further described with reference to the following embodiments in conjunction with the accompanying drawings.

Example (b):

as shown in fig. 2-15, a water-cutting sealing strip injection mold comprises an upper mold 1 and a lower mold 2, wherein the lower mold 2 comprises an upper fixing plate 3, a lower fixing plate 4 and a side plate 5 for connecting the upper fixing plate 3 and the lower fixing plate 4, the upper fixing plate 3 and the lower fixing plate 4 are arranged at an upper interval and a lower fixing plate 4, the lower mold 2 further comprises an ejector plate 6 arranged between the upper fixing plate 3 and the lower fixing plate 4 and an up-and-down driving device 7 for driving the ejector plate 6 to move up and down, a slider seat 8 and a lower mold core 9 are embedded in the upper fixing plate 3 side by side in a left-and-right direction, one or more product positions 11 for accommodating the front section of a product main body 10 are arranged on the lower mold core 9, a straight ejector block 12 connected with the ejector plate 6 is further arranged on each product position 11 and used for inserting into a groove on one side of the product main body 10 and ejecting the product, the mold comprises a slider seat 8, first sliders 14 capable of covering each product position 11 are arranged on the slider seat 8 in a left-right sliding mode, an inclined guide post 15 for driving each first slider 14 to slide left and right is further arranged on the upper mold 1, the first sliders 14 move inwards during mold closing and injection molding, an injection space is formed between the first sliders 14 and the front end of the product position 10, the first sliders 14 move outwards during mold opening and are separated from injection molded parts 16, the outer side of the slider seat 8 is rotatably connected with a lower mold 2, a rotating device 17 for driving the slider seat 8 to rotate is arranged on the lower mold 2, and the rotating device is used for driving the first sliders 14 to cover the product position 11 during mold closing and driving the first sliders 14 to open upwards during mold opening.

When the injection mold for the water-cut sealing strip is used for injection molding, the limit block 13 is used for positioning the filling depth of the product main body 10, the first slide block 14 and the product main body 10 form an injection molding space, the inclined guide post 15 is used for enabling the first slide block 14 to move and be separated from a product when the injection mold is used for demolding, and the rotating device 17 is used for enabling the first slide block 14 to rotate, so that the straight ejector block 12 positioned below the first slide block 14 can eject the product to demold the product.

Preferably, the up-down driving device 7 comprises an ejector 18 connected with an up-down ejector mechanism 47 of the injection molding machine, the end of the ejector 18 is pressed against the bottom of the ejector plate 6, and a first compression spring 19 is arranged between the ejector plate 6 and the upper fixing plate 3. The ejector plate 6 can be directly ejected upwards by an ejection mechanism of the injection molding machine, so that the straight ejection block 12 ejects a product upwards to demold the product, an ejection mechanism is not required to be additionally arranged, the mechanism is simpler, and the cost is lower; after the injection molding machine falls back from the ejection mechanism and is separated from the ejector plate 6, the ejector plate 6 falls back by the first compression spring 19 between the ejector plate 6 and the upper fixing plate 3, and the straight ejector block 12 retracts.

Preferably, the rotating device 17 includes a fixed rail 20 fixed on the lower mold 2 and adjacent to one side of the slider seat 8, and an oil cylinder 21 mounted on the fixed rail 20, a fixed end 22 of the oil cylinder 21 is mounted on the outer side of the fixed rail 20, a free end 23 of the oil cylinder 21 extends into the fixed rail 20 and is slidably connected with the fixed rail 20 through a second slider 24 fixed on the free end 23, the fixed rail 20 is provided with a first pivot 25, the second slider 24 is provided with a second pivot 26, the second pivot 26 is located above the first pivot 25, the first pivot 25 is closer to the slider seat 8 than the second pivot 26, the first support 27 further includes a horizontal plate member 28 and an inclined plate member 29 arranged on the horizontal plate member 28, one side of the horizontal plate member 28 is connected with one side of the inclined plate member 29 and forms an obtuse angle, the horizontal plate member 28 is connected with the swash plate member 29 at a position rotatably connected with the first pivot 25, a kidney-shaped through groove 30 is formed in the side surface of the swash plate member 29, and the second pivot 26 is inserted into the kidney-shaped through groove 30 and used for enabling the second pivot 26 to slide in the kidney-shaped through groove 30 when the oil cylinder 21 extends and contracts left and right so as to drive the first support 27 connected with the slider seat 8 to rotate around the first pivot 25. The rotating device 17 is simple and compact in structure and reliable in rotation.

Preferably, the side surface of the limiting block 13 is provided with a first limiting groove 31 and a second limiting groove 32 at an upper and lower interval, the first limiting groove 31 is located below the second limiting groove 32, and the lower die 2 is provided with a first locking tongue 33 for being positioned on the first limiting groove 31 and the second limiting groove 32 and for positioning the limiting block 13 at an extending position and a retracting position. This arrangement enables the stopper 13 to be reliably positioned at the extended position and the retracted position.

Preferably, the mold further comprises a second support 34 arranged between the lower mold core 9 and the ejector plate 6 and used for installing the limit block 13, a second lock tongue 35 is further arranged below the first support 27 at the free end 23 of the oil cylinder 21, the second lock tongue 35 can extend into the space between the lower mold core 9 and the second support 34 under the driving of the oil cylinder 21, an inclined surface 36 which is gradually retracted from top to bottom is arranged at one end of the second lock tongue 35 close to the second support 34, a third limit groove 37 which is matched with the inclined surface 36 of the second lock tongue 35 is arranged on the second support 34, when the ejector plate 6 falls downwards and the second lock tongue 35 extends into the space between the lower mold core 9 and the second support 34, the second lock tongue 35 abuts against the top surface of the second support 34 and the first lock tongue 33 is positioned in the second limit groove 32 of the limit block 13, the limit block 13 is in a retracted state, the second lock tongue 35 retreats from the top surface of the second support 34 and the ejector plate 6 is ejected upwards, the ejector plate 6 drives the second support 34 and the limiting block 13 thereon to eject upwards until the inclined surface 36 of the second lock tongue 35 is clamped into the third limiting groove 37 of the second support 34 and the first lock tongue 33 is clamped into the first limiting groove 31 of the limiting block 13, and the limiting block 13 is in an extending state. Add second spring bolt 35 on rotary mechanism, usable second spring bolt 35 locks and unblock stopper 13, thereby can guarantee that first slider 14 rotates the lid and closes when product position 11, stopper 13 contracts downwards, and only when first slider 14 upwards opens, just can make stopper 13 stretch out, and the inclined plane 36 that sets up on the second spring bolt 35 and the third spacing recess 37 that sets up on the second support 34, not only can make things convenient for stretching into and withdrawing from of second spring bolt 35, but also can assist first spring bolt 33 to play limiting displacement.

Preferably, press blocks 38 for pressing the product main body 10 are embedded in the two sides of each product grade 11 on the lower mold core 9, one end of one of the press blocks 38 is provided with a limit pin 39, the limit pin 39 passes through a positioning hole 40 at one end of the press block 38 and then is fixed on the lower mold core 9, the aperture of the positioning hole 40 of the press block 38 is larger than that of the limit pin 39, the bottom of the other end of the press block 38 is further provided with a first containing cavity 41, a second containing cavity 42 is arranged at a position on the lower mold core 9 corresponding to the first containing cavity 41, the first containing cavity 41 and the second containing cavity 42 form a space for installing a second compression spring 43, the inner walls of the first containing cavity 41 and the second containing cavity 42 are staggered to form a staggered step 44, the upper mold 1 is further provided with a positioning block 45 which is embedded in the lower mold core 9 and abuts against the press block 38 when the mold is closed, the positioning block 45 abuts against the press block 38 when the mold is, when the mold is opened, the positioning block 45 releases the limit of the pressing block 38, and the second compression spring 43 drives the pressing block 38 to move by the stroke of the dislocation step 44 so as to be separated from the product. This setting can utilize the briquetting 38 of left and right sides to play the clamping action to product main part 10 when the compound die to make product main part 10 can not retreat at the in-process of moulding plastics, and when the die sinking, can make one of them briquetting 38 move away a distance again, thereby the product drawing of patterns after conveniently moulding plastics.

Preferably, the lower mold 2 further comprises a support seat 46 for supporting a rear section of the product. This arrangement can make the product placement more stable.

Preferably, two product grades 11 are arranged on the lower mold core 9. This arrangement takes into account both the complexity of the structure and the production efficiency.

assume the initial state is: closing the dies, wherein the ejector plate 6 and the straight ejector block 12 both fall back, the second bolt 35 on the free end 23 of the oil cylinder 21 extends into the space between the lower die core 9 and the second support 34, at the moment, the second bolt 35 abuts against the top surface of the second support 34, the second support 34 is locked by the second bolt 35 and cannot move upwards, the first bolt 33 is positioned in the second limiting groove 32 of the limiting block 13, and the limiting block 13 is in a retracted state;

when the product is injected and needs to be taken out, the mold is firstly opened, the first sliding block 14 moves outwards under the driving of the inclined guide post 15, the first sliding block 14 is separated from the product on the product grade 11, and meanwhile, the pressing block 38 on one side of the product is moved away from the product for a certain distance so as to facilitate the subsequent demolding; then the free end 23 of the oil cylinder 21 is shortened to drive the slider seat 8 to rotate, the slider seat 8 drives the first slider 14 to open upwards, and the free end 23 of the oil cylinder 21 drives the second lock tongue 35 to retreat from the top surface of the second support 34 while being shortened; finally, the straight ejector block 12 is driven by the ejector plate 6 and an upper and lower ejection mechanism of the injection molding machine, the product is ejected upwards, and then the product can be demolded, because the second bolt 35 is retreated from the top surface of the second support 34 at the moment, and the second support 34 is unlocked with the second bolt 35, when the ejector plate 6 is ejected upwards, the ejector plate 6 can drive the second support 34 and the limiting block 13 thereon to eject upwards until the inclined surface 36 of the second bolt 35 is clamped into the third limiting groove 37 of the second support 34, the first bolt 33 is clamped into the first limiting groove 31 of the limiting block 13, and the limiting block 13 is in an extending state;

when injection molding is needed, the first sliding block 14 is still opened upwards, the limiting block 13 is in an extending state, the injection molding machine falls back from an upper ejection mechanism and a lower ejection mechanism of the injection molding machine and is separated from the ejector plate 6, and the ejector plate 6 and the straight ejector block 12 on the ejector plate are driven to fall back by a first compression spring 19 arranged between the ejector plate 6 and the upper fixing plate 3; then, inserting the front section of the product main body 10 into the product position 11 through the groove on the side surface and the straight top block 12 until the front end of the product main body 10 abuts against the limiting block 13; then the free end 23 of the oil cylinder 21 extends to enable the first sliding block 14 to cover the product position 11 again, the free end 23 of the oil cylinder 21 drives the second lock tongue 35 to press the second support 34 downwards while extending, so that the second lock tongue 35 extends between the lower mold core 9 and the second support 34 and abuts against the top surface of the second support 34, the second support 34 is locked by the second lock tongue 35, at this time, the first lock tongue 33 is positioned in the second limit groove 32 of the limit block 13, and the limit block 13 moves downwards along with the second support 34 to be in a retraction state; finally, the mold is closed, the inclined guide post 15 drives the first slide block 14 to move inwards, an injection space is formed between the first slide block 14 and the front end of the product main body 10, and the pressing block 38 which is originally separated from the product main body 10 presses the product main body 10 again to prevent the product from moving backwards during injection.

Claims

1. The utility model provides a sealing strip injection mold is cut to water, includes mould (1) and lower mould (2), its characterized in that: the lower die (2) comprises an upper fixing plate (3) and a lower fixing plate (4) which are arranged at an upper and lower interval, a side plate (5) used for connecting the upper fixing plate (3) and the lower fixing plate (4), an ejector plate (6) arranged between the upper fixing plate (3) and the lower fixing plate (4), and an upper and lower driving device (7) used for driving the ejector plate (6) to move up and down, wherein a slider seat (8) and a lower die core (9) are embedded in the upper fixing plate (3) side by side from left to right, one or more product positions (11) used for containing the front section of a product main body (10) are arranged on the lower die core (9), straight ejector blocks (12) connected with the ejector plate (6) are respectively arranged at the positions of the product positions (11) on the lower die core (9) and used for inserting into a groove on one side of the product main body (10) and ejecting products upwards after, the lower mold core (9) is also provided with a limiting block (13) capable of automatically stretching up and down, the limiting block is used for limiting the position of the front end of the product main body (10) when the mold is opened and the straight top block (12) falls back and is inserted into the product main body (10), the slider seat (8) is provided with a first slider (14) capable of covering each product grade (11) in a left-right sliding manner, the upper mold (1) is also provided with an inclined guide post (15) used for driving each first slider (14) to slide left and right, the inclined guide post is used for enabling the first slider (14) to move inwards when the mold is closed and injection molding is carried out, the inclined guide post and the inclined guide post are used for enabling the first slider (14) to move outwards and form an injection molding space with the front end of the product main body (10) and enabling the first slider (14) to move outwards and be separated from an injection molding part (16) when the mold is opened, the outer side of, the mould closing mechanism is used for driving the first sliding block (14) to cover the product position (11) during mould closing and driving the first sliding block (14) to open upwards during mould opening; the rotating device (17) comprises a fixed guide rail (20) fixedly arranged on the lower die (2) and close to one side of the sliding block seat (8), and an oil cylinder (21) arranged on the fixed guide rail (20), wherein a fixed end (22) of the oil cylinder (21) is arranged on the outer side of the fixed guide rail (20), a free end (23) of the oil cylinder (21) extends into the fixed guide rail (20) and is in sliding connection with the fixed guide rail (20) through a second sliding block (24) fixedly arranged on the free end (23), a first pivot (25) is arranged on the fixed guide rail (20), a second pivot (26) is arranged on the second sliding block (24), the second pivot (26) is positioned above the first pivot (25), and the first pivot (25) is closer to the sliding block seat (8) than the second pivot (26), the rotating device further comprises a first support (27), the first support (27) comprises a horizontal plate piece (28) and an inclined plate piece (29) arranged on the horizontal plate piece (28), one side of horizontal plate spare (28) links to each other and the contained angle is the obtuse angle with one side of swash plate spare (29), the position that horizontal plate spare (28) and swash plate spare (29) link to each other rotates with first pivot (25) and is connected, the side of swash plate spare (29) is equipped with waist shape and leads to groove (30), second pivot (26) wear to establish in waist shape leads to groove (30) for make second pivot (26) slide in waist shape leads to groove (30) and rotate around first pivot (25) with drive first support (27) that link to each other with slider seat (8) when hydro-cylinder (21) are flexible about.

2. The water-cut sealing strip injection mold according to claim 1, characterized in that: the upper and lower driving device (7) comprises an ejector (18) connected with an upper and lower ejection mechanism (47) of the injection molding machine, the end part of the ejector (18) is abutted against the bottom of the ejector plate (6), and a first compression spring (19) is arranged between the ejector plate (6) and the upper fixing plate (3).

3. The water-cut sealing strip injection mold according to claim 1, characterized in that: spacing about the side of stopper (13) sets up first spacing recess (31) and second spacing recess (32), first spacing recess (31) are located the below of second spacing recess (32), be equipped with on lower mould (2) and be used for fixing a position first spring bolt (33) on first spacing recess (31) and second spacing recess (32) for fix a position stopper (13) in the extended position and retracted position.

4. The water-cut sealing strip injection mold according to claim 3, characterized in that: still include a second support (34) that is used for installing stopper (13) that sets up between lower mold core (9) and thimble board (6), free end (23) of hydro-cylinder (21) and the below that is located first support (27) still are equipped with second spring bolt (35), second spring bolt (35) can stretch into down between mold core (9) and second support (34) under the drive of hydro-cylinder (21), second spring bolt (35) are close to the one end setting of second support (34) and from top to bottom indent inclined plane (36) gradually, be equipped with on second support (34) with inclined plane (36) matched with third spacing recess (37) of second spring bolt (35), when thimble board (6) fall back down and second spring bolt (35) stretch into between lower mold core (9) and second support (34), second spring bolt (35) are balanced with the top surface of second support (34) and first spring bolt (33) are positioned in second spacing recess (32) of second stopper (13), second spring bolt (35) and second support (34) are supported with the top surface of second support (34) and first spring bolt (35) and are balanced The limiting block (13) is in a retraction state, the second lock bolt (35) retreats from the top surface of the second support (34) and the ejector plate (6) is ejected upwards, the ejector plate (6) drives the second support (34) and the limiting block (13) on the second support to be ejected upwards until the inclined surface (36) of the second lock bolt (35) is clamped into the third limiting groove (37) of the second support (34) and the first lock bolt (33) is clamped into the first limiting groove (31) of the limiting block (13), and the limiting block (13) is in an extension state.

5. The water-cut sealing strip injection mold according to claim 1, characterized in that: the die comprises a lower die core (9), pressing blocks (38) used for pressing a product main body (10) are embedded in two sides of each product grade (11) on the lower die core (9), a limiting pin (39) is arranged at one end of one pressing block (38), the limiting pin (39) penetrates through a positioning hole (40) in one end of the pressing block (38) and then is fixed on the lower die core (9), the aperture of the positioning hole (40) of the pressing block (38) is larger than that of the limiting pin (39), a first containing cavity (41) is further arranged at the bottom of the other end of the pressing block (38), a second containing cavity (42) is arranged at a position, corresponding to the first containing cavity (41), on the lower die core (9), the first containing cavity (41) and the second containing cavity (42) form a space for installing a second compression spring (43), the inner walls of the first containing cavity (41) and the second containing cavity (42) are staggered to form a staggered step (44), and the upper die core (1) is further provided with a staggered step (38) embedded on the lower die core The abutting positioning block (45) abuts against the pressing block (38) during die assembly to enable the pressing block (38) to press the product, the positioning block (45) releases the limit on the pressing block (38) during die opening, and the second compression spring (43) drives the pressing block (38) to move to displace the stroke of the dislocation step (44) to separate from the product.

6. The water-cut sealing strip injection mold according to claim 1, characterized in that: the lower die (2) further comprises a supporting seat (46) for supporting the rear section of the product.

7. The water-cut sealing strip injection mold according to claim 1, characterized in that: the lower mold core (9) is provided with two product grades (11).