CN111823507A

CN111823507A - Worm injection mold

Info

Publication number: CN111823507A
Application number: CN202010697110.3A
Authority: CN
Inventors: 毛海华; 黄历峰
Original assignee: Ningbo Jinghua Electronics Technology Co ltd
Current assignee: Ningbo Jinghua Electronics Technology Co ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2020-10-27

Abstract

The invention discloses a worm injection mold, which comprises a movable mold core and a static mold core, wherein two worm molding stations capable of changing positions alternately are arranged on the static mold core; when the mold is closed again, the injection molding station performs injection molding towards another worm molding station, and the demolding mechanism drives the injection molded worm to perform rotary demolding during the injection molding so as to reciprocate, so that the integrated process of worm molding and demolding is realized in each mold closing process. According to the worm injection mold disclosed by the invention, the existing manual demolding is replaced by the automatic demolding, so that the labor intensity of operators is reduced, and the production efficiency is improved.

Description

Worm injection mold

Technical Field

The invention relates to the technical field of molds, in particular to a worm injection mold.

Background

The plastic worm is widely applied in modern industry, the plastic worm and the turbine are commonly used for transmitting the motion and the power between two staggered shafts, the worm transmission is equivalent to spiral transmission and is multi-tooth meshing transmission, so the transmission is stable, the noise is low, and most of the plastic worms need to be subjected to injection molding by virtue of a mold during production.

The traditional worm injection mold adopts a cold runner point glue feeding mode, after injection molding is finished, a worm and a mold insert need to be ejected together, and as a thread through hole for forming the external thread of the worm is formed in the mold insert, after the mold is opened, the worm needs to be taken out of the mold insert manually (such as a tool of manual rotation or a screwdriver) and is separated from the mold insert, the thread mold insert is sequentially placed into the mold again after the worm is taken out, and then mold closing production is carried out.

The traditional manual piece taking mode has the following defects:

1. the worm is manually taken out of the insert, so that the production time is increased, and the production benefit is reduced; the labor intensity of workers is high, and the worm can be damaged if the workers do not operate properly, so that the production cost is increased;

2. the threaded inserts need to be replaced frequently, which means that at least twice the number of inserts need to be made, and if improper operation causes die pressing or damages to the threaded inserts, the service life of the die is shortened, and the cost is increased.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the worm injection mold replaces the conventional manual demolding by automatic demolding, reduces the labor intensity of operators and improves the production efficiency.

The technical scheme adopted by the invention is as follows: the worm injection mold comprises a movable mold base and a fixed mold base, wherein a hot runner system is arranged on the movable mold base, and a movable mold core communicated with the hot runner system is arranged at one end, close to the fixed mold base, of the movable mold base; the static die holder is provided with a static die core matched with the movable die core, the static die core is provided with two worm forming stations, and the static die holder is provided with a first driver for driving the two worm forming stations to be alternately replaced; the movable mold core is provided with an injection molding station and a demolding mechanism corresponding to the two worm molding stations, and the injection molding station is communicated with the hot runner system; when the mold is closed for the first time, the injection molding station performs injection molding towards one of the worm molding stations, and when the mold is opened, the first driver drives the two worm molding stations to change positions; when the mold is closed again, the injection molding station performs injection molding towards another worm molding station, and the demolding mechanism drives the injection molded worm to perform rotary demolding during the injection molding so as to reciprocate, and the integrated process of worm molding and demolding is realized in each mold closing process.

Compared with the prior art, the invention has the following advantages:

in the worm injection mold structure, a static mold core structure is redesigned, two worm forming stations are arranged on the static mold core, the two worm forming stations can also be replaced mutually in a reciprocating mode, the injection molding station and the demolding mechanism are arranged on the movable mold core corresponding to the two worm forming stations, the position between the two worm forming stations is switched during mold opening and closing continuously, and during mold closing, injection molding and automatic demolding can be carried out simultaneously by combining the demolding mechanism, so that the production time is reduced, and the production benefit is improved; and moreover, manual demoulding and manual insert placement are replaced by automatic demoulding, so that the labor intensity of workers and the risk of damage to the mould are reduced, and the product quality is stabilized.

As an improvement, m groups of forming cavities are symmetrically arranged on the static mold core along the circumferential direction, m is an even number which is more than or equal to 2, and each worm forming station comprises m/2 groups of forming cavities; and m/2 group forming cavities of each worm forming station are arranged in sequence along the circumferential direction or are arranged in a staggered way with the m/2 group forming cavities of the other worm forming station. The number of the molding cavities determines the number of the worms molded by each mold, namely the working efficiency, and the setting of the value of the parameter m in the structure can realize the free switching of two worm molding stations, thereby improving the working efficiency.

Preferably, two groups of forming cavities which form an angle of 90 degrees are circumferentially arranged on the static mold core, and each group of forming cavities comprises a plurality of forming holes which are symmetrically arranged. The two groups of forming cavity structures are arranged, the structure is simple, and the operation is convenient.

The improved worm forming device is characterized in that an insert is detachably arranged in the forming hole, and a threaded through hole for forming the external thread of the worm is formed in the insert; the injection molding station comprises a plurality of mandrels for molding inner bores of the worm, and the mandrels are inserted and matched in the threaded through holes during mold closing.

The demoulding mechanism comprises a plurality of demoulding rotating shafts and a second driver for driving the demoulding rotating shafts to rotate, wherein one end of each demoulding rotating shaft is connected with the second driver, and the other end of each demoulding rotating shaft is in linkage fit with the end part of the worm; and a demolding through hole for the worm to pass through is formed in the position, corresponding to the demolding mechanism, of the static die holder, and when the die is closed, the second driver drives the demolding rotating shaft to rotate so as to drive the worm to rotate, so that the worm penetrates out of the demolding through hole after being separated from the insert.

And the other end of the static die holder, which deviates from the static die core, is provided with a guide sliding groove, and the demolding through hole is communicated with the guide sliding groove. The arrangement of the guide sliding groove structure in the structure facilitates the uniform collection of the stripped worms.

The movable mold core is provided with a fixed block, and a plurality of demolding rotating shafts are rotatably matched on the fixed block; the demolding mechanism is characterized in that driven gears are arranged on the demolding rotating shaft, a driving shaft is rotatably arranged on the fixing block, first gears meshed with the driven gears are arranged at one end of the driving shaft, a second gear is arranged at the other end of the driving shaft, a transmission chain is arranged outside the second gear in a matched mode, and the other end of the transmission chain is matched with an output shaft of a second driver.

The fixed block is provided with a mounting hole, and one end of the demoulding rotating shaft is matched in the mounting hole in a sliding manner along the axial direction; the outside cover of drawing of patterns pivot is equipped with the elastic component, the one end of elastic component is connected on the fixed block, and the other end is connected on the driven gear terminal surface. The elastic piece is arranged, so that one end of the demolding rotating shaft, close to the static mold core, can extend out of the surface of the movable mold core in a longer way under the action of elasticity, and when the movable mold base and the static mold base are not contacted during mold closing, the end part of the demolding rotating shaft can be matched with the end surface of the worm in advance, and the accuracy of subsequent demolding is improved.

The static die holder is provided with a movable die holder, and the movable die holder is provided with a static die core; and the first driver drives the static die core to rotate in a positive and negative reciprocating mode so as to realize the mutual alternate replacement of the two worm forming stations.

Drawings

Fig. 1 is a conventional worm structure diagram.

Fig. 2 is a schematic structural diagram of the mold opening state of the worm injection mold according to the present invention.

Fig. 3 is another angle structure view of a worm injection mold of the present invention.

Fig. 4 is a sectional view showing an opened state of the worm injection mold according to the present invention.

FIG. 5 is a schematic view of the mold-opening state structure of the worm injection mold of the present invention.

FIG. 6 is a schematic view of another angle structure of the worm injection mold in the mold-opened state according to the present invention.

Fig. 7 is a partial structural view of a matching structure of a demolding mechanism and a static mold core in the invention.

Fig. 8 is a structural view of the movable core of the present invention.

Fig. 9 is another angle structure view of the movable core of the present invention.

Fig. 10 is a structural view of a stationary mold core in another embodiment of the present invention. (arrangement type one)

Fig. 11 is a structural view of a stationary core in another embodiment of the present invention. (arrangement type two)

Wherein, 100-worm and 100.1-matching hole

1-movable die holder, 2-fixed die holder, 2.1-containing cavity, 2.2-guide chute, 2.3-demoulding through hole, 3-movable die core, 4-fixed die core, 5-hot runner system, 6-insert, 6.1-threaded through hole, 7-mandrel, 8-demoulding rotating shaft, 8.1-driven gear, 9-second driver, 10-fixed block, 11-driving shaft, 11.1-first gear, 11.2-second gear, 12-driving chain, 13-elastic part, 14-bottom plate and 15-opening.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g. as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, the terms "first" and "second" are used for convenience of description and distinction, and have no specific meaning.

As shown in fig. 2 and 4, the worm injection mold provided by the invention comprises a movable mold base 1 and a stationary mold base 2, wherein a hot runner system 5 is arranged on the movable mold base 1, and a movable mold core 3 communicated with the hot runner system 5 is arranged at one end of the movable mold base 1 close to the stationary mold base 2; a static die core 4 matched with the movable die core 3 is arranged on the static die holder 2, two worm forming stations are arranged on the static die core 4, and a first driver for driving the two worm forming stations to be alternately replaced is arranged on the static die holder 2; specifically, in the present embodiment, an accommodating cavity 2.1 is provided at one end of the static die holder 2 close to the dynamic die holder 1, and the static die core 4 is rotatably installed in the accommodating cavity 2.1 along the circumferential direction; the first driver drives the movable and fixed mold cores 4 to rotate in a positive and negative reciprocating mode so as to realize mutual alternate replacement of the two worm forming stations. More specifically, in order to improve the rotation flexibility of the static mold core 4, a bearing is installed in the accommodating cavity 2.1, and the static mold core 4 is correspondingly matched in an inner hole of the bearing.

In addition, an injection molding station and a demolding mechanism are arranged on the movable mold core 3 corresponding to the two worm molding stations, wherein the injection molding station is communicated with the hot runner system 5; in the structure, when the mold is closed for the first time, the injection molding station performs injection molding towards a worm molding station corresponding to the injection molding station in advance, the mold is opened for the first time after the worm 100 is molded, and a first driver drives the movable mold core 4 to rotate after the mold is opened, so that the mutual replacement position of the two worm molding stations is realized; namely, the worm molding station originally corresponding to the injection molding station is switched to correspond to the demolding mechanism, and the worm molding station originally corresponding to the demolding mechanism is switched to correspond to the injection molding station. When the molds are closed again, the injection molding station performs injection molding towards another worm molding station, and simultaneously with the injection molding, the demolding mechanism drives the worm 100 which has completed the injection molding during the first mold closing to rotationally demold; therefore, the integration process of worm molding and demolding is realized in each mold closing process. Specifically, after the first mold closing injection is completed, when the mold closing is performed each time, the worm 100 can be formed at another worm forming station by the injection station, and the demolding mechanism prompts the worm 100 formed in the previous mold closing to be separated from the corresponding mold cavity, so that the automatic demolding and blanking of the worm 100 are realized. The whole process is as follows: closing the mold, and forming the worm 100 in one of the worm forming cavities; opening the mold, and mutually replacing the positions of the two worm forming stations; closing the mold, molding the worm at the other worm molding station, and demolding and blanking the molded worm by closing the mold at the last time; therefore, automatic molding and automatic demolding and discharging of the worm 100 are realized in the continuous die opening and closing process, the whole process is completed automatically, manual operation for stripping the worm 100 is not needed, and the working efficiency is improved. In addition, in the worm injection mold, only the position switching of two worm forming stations is needed during mold opening, the worm 100 does not need to be operated for demolding, demolding and blanking of the worm 100 are synchronous demolding during next mold closing injection molding, and the middle demolding and material taking time is further saved in the process.

Specifically, m groups of forming cavities are symmetrically arranged on the static mold core 4 along the circumferential direction, m is an even number which is more than or equal to 2, and each worm forming station comprises m/2 groups of forming cavities; and m/2 group forming cavities corresponding to each worm forming station are sequentially arranged together along the circumferential direction or are sequentially arranged in a mutually staggered way with the m/2 group forming cavities of the other worm forming station.

In this embodiment, as shown in fig. 7, two sets of molding cavities, referred to as a first molding cavity 01 and a second molding cavity 02, are symmetrically disposed on the stationary core 4. And the first forming cavity 01 and the second forming cavity 02 are arranged at an angle of 90 degrees, so that when the two groups of forming cavities are switched, the static die core 4 is rotated by 90 degrees.

In another embodiment, the first arrangement:

as shown in fig. 10, six sets of cavities are symmetrically disposed on the stationary core 4, and each worm forming station includes three sets of cavities, shown at A, B. Specifically, three groups of forming cavities of each worm forming station in the embodiment are arranged in a circumferential sequence, so that A, B two worm forming stations are switched with each other, and only the static die core 4 needs to be rotated by 90 degrees in a reciprocating manner in a clockwise direction or a counterclockwise direction.

The second arrangement mode:

as shown in fig. 11, six sets of cavities, A, B, are symmetrically arranged on the stationary die core 4; and each worm forming station comprises three groups of forming cavities, namely three symmetrical A forming stations are one worm forming station, and three B forming stations are the other worm forming station. Specifically, in this embodiment, the three sets of forming cavities of each worm forming station are circumferentially staggered from the three sets of forming cavities of another worm forming station. More specifically, on the movable mold core 3, the injection molding station is correspondingly arranged corresponding to the station where the mold core a is located, and the demolding mechanism is arranged corresponding to the station where the mold core B is located, so that position switching of the two stations where the mold core A, B is located can be realized by driving the movable mold core 4 to rotate in a clockwise or counterclockwise direction for 30 degrees in a reciprocating manner each time. In brief, taking clockwise as an example, the whole forming process is as follows: carrying out first die assembly, and carrying out injection molding on the station A; opening the die, namely, rotating the static die core 4 clockwise by 30 degrees, and switching two stations where A, B is located; the mold is closed again, the station B is in injection molding, and the demolding mechanism drives the molded worm in the station A to be demolded; opening the die again, and switching back the two stations where the static die core 4 rotates 30 degrees clockwise and anticlockwise and A, B is located again; and (3) carrying out mold assembly again, carrying out injection molding on the station A, driving the molded worm on the station B to be demolded by the demolding mechanism, and continuously repeating the action to realize the automatic molding, automatic demolding and blanking processes of the worm.

Specifically, in this embodiment, the structure of two molding cavities is used to specifically describe the structural form of the demolding mechanism:

as shown in fig. 5, 6 and 7, the two sets of molding cavities are arranged at an angle of 90 °, and each set of molding cavities includes a plurality of molding holes 4.1 which are symmetrically arranged. More specifically, each group of molding cavities comprises eight molding holes 4.1, the eight molding holes 4.1 are symmetrically distributed, four molding holes 4.1 are arranged on each side, an insert 6 is detachably arranged in each molding hole 4.1, a threaded through hole 6.1 for molding the external thread of the worm 100 is formed in the insert 6, and therefore eight worm 100 products can be formed through one-time injection molding. In addition, the injection molding station comprises a plurality of mandrels 7 for forming inner holes of the worms 100, and particularly, in the embodiment, the mandrels 7 are integrally formed on one side of the movable mold core 3 close to the static mold core 4, as shown in fig. 9. When the die is closed, the core shaft 7 is inserted and matched in the threaded through hole 6.1, an injection molding hole 3.1 is arranged on the movable die core 3 at a position close to the core shaft 7, a corresponding extrusion cavity 3.2 is arranged at a position, corresponding to each core shaft 7, on one side of the movable die core 3 close to the hot runner system, and the injection molding hole 3.1 is arranged at the bottom of the extrusion cavity 3.2; and the injection molding hole 3.1 is communicated with the threaded through hole 6.1, so that the molten raw materials in the hot runner system 5 enter the threaded through hole 6.1 from the injection molding hole 3.1 to perform injection molding of the worm. More specifically, the structure is provided with a forming bulge for forming a matching hole 100.1 at the end part of the worm 100 at one end of the mandrel 7 close to the movable mold core 3.

In this embodiment, the demolding mechanism includes a plurality of demolding rotation shafts 8 and a second driver 9 for driving the demolding rotation shafts 8 to rotate, as shown in fig. 7, the demolding mechanism specifically includes eight demolding rotation shafts 8; one end of each demoulding rotating shaft 8 is connected with a second driver 9, and the connection can be direct connection or indirect driving connection; the other end of the demoulding rotating shaft 8 is in linkage fit with the end of the worm 100, wherein the linkage fit means that when the end of the worm 100 close to one end of the demoulding rotating shaft 8 is formed, a corresponding matching hole 100.1 is formed, as shown in fig. 1, for example, a cross groove, a polygonal jack and the like; correspondingly, a corresponding insertion column is arranged at one end of the demolding rotating shaft 8 close to the worm 100, namely, the insertion column is matched with a cross groove or a polygonal insertion hole, so that the worm 100 is driven to rotate synchronously when the demolding rotating shaft 8 rotates, and simply, the linkage matching of the demolding rotating shaft 8 and the end face of the worm 100 can be simply understood as the matching of a screwdriver and a screw hole.

A demolding through hole 2.3 for the worm 100 to pass through is formed in the position, corresponding to the demolding mechanism, of the static die holder 2, and during die assembly, the second driver 9 drives the demolding rotating shaft 8 to rotate so as to drive the worm 100 to rotate, and the worm penetrates through the demolding through hole 2.3 after being separated from the insert 6. In this embodiment, as shown in fig. 3, a guide chute 2.2 is further disposed at one end of the static die holder 2 away from the static die core 4, and the guide chute 2.2 extends to a side surface of the static die holder 2; the demoulding through hole 2.3 is communicated with the guide chute 2.2. Therefore, when the die is closed, the second driver 9 drives the demolding rotating shaft 8 to rotate, the worm 100 is driven to rotationally demold from the threaded through hole 6.1 in the insert 6, the demolded worm 100 enters the guide chute 2.2 through the demolding through hole 2.3, in practical application, one side, far away from the movable die holder 1, of the static die holder 2 is further connected with the corresponding bottom plate 14, the guide chute 2.2 in the static die holder 2 is covered by the bottom plate 14 after installation, only the opening 15 extending to one side of the side wall of the static die holder 2 is reserved, and the opening 15 is arranged downwards, so that automatic collection of the worm 100 can be realized as long as the collection box or the collection belt is arranged below the opening 15 at the side wall end of the static die holder 2.

As shown in fig. 7, a fixed block 10 is provided on the movable mold core 3, and a plurality of demolding rotation shafts 8 are rotatably fitted on the fixed block 10; the demolding rotating shaft 8 is provided with driven gears 8.1, the fixing block 10 is provided with a driving shaft 11 in a rotating mode, one end of the driving shaft 11 is provided with a first gear 11.1 meshed with each driven gear 8.1, the other end of the driving shaft 11 is provided with a second gear 11.2, the outside of the second gear 11.2 is provided with a transmission chain 12 in a matching mode, and the other end of the transmission chain 12 is matched with an output shaft of the second driver 9. That is, during the mold closing, the second driver 9 drives the transmission chain 12 to rotate, the transmission chain 12 drives the second gear 11.2 on the driving shaft 11 to rotate, so that the driving shaft 11 rotates, the first gear 11.1 synchronously rotates while the driving shaft 11 rotates, the driven gear 8.1 is driven to drive the demolding rotating shaft 8 to rotate, and under the linkage action of the end part of the demolding rotating shaft 8 and the matching hole 100.1 at the end part of the worm 100, the worm 100 rotates along the threaded hole 6.1 until the worm is separated from the threaded hole 6.1, so that the blanking is realized. As shown in fig. 7, the present embodiment specifically includes two sets of driving assemblies, that is, two driving shafts 11 symmetrically disposed, and four demolding rotation shafts 8 are fitted around each driving shaft 11; namely, the molding of the eight worms 100 and the rotary demolding blanking of the eight worms 100 are realized at each mold closing.

A mounting hole is formed in the fixed block 10, and one end of the demolding rotating shaft 8 is axially matched in the mounting hole in a sliding manner; the outside suit of drawing of patterns pivot 8 has elastic component 13, and the one end of elastic component 13 is connected on fixed block 10, and the other end is connected on driven gear 8.1 terminal surface. In this embodiment, the elastic member 13 is preferably a spring, but may be an elastic connecting member made of other elastic materials, such as a rubber bellows, in other embodiments. After having increased elastic component 13 in this structure, can be so that the better protrusion of drawing of patterns pivot 8 in the terminal surface of movable mould core 3, at the compound die in-process like this, when movable mould base 1, static mould base 2 do not contact, the outer tip of drawing of patterns pivot 8 has been cooperateed in the mating holes 100.1 of worm 100 terminal surface in advance, follow up with the compound die and continue to go on, until movable mould core 3 and static mould core 4 laminate completely, because the elastic action of elastic component 13, the tip of drawing of patterns pivot 8 has the trend towards worm 100 motion all the time, it is stable with the worm 100 cooperation to guarantee that drawing of patterns pivot 8 is stable with the cooperation, thereby improve the stability and the accuracy of follow-up rotation.

In the above mold structure, the first driver is a rotary cylinder and the second driver is a reduction motor.

This novel injection mold has following advantage:

1. the injection molding and the automatic demolding can be carried out simultaneously, so that the production time is reduced, and the production benefit is improved;

2. the automatic demolding replaces manual demolding and inserts are placed manually, the labor intensity of workers and the risk of damage to the mold are reduced, and the product quality is stabilized.

The foregoing has described preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary, and various changes made within the scope of the independent claims of the present invention are within the scope of the present invention.

Claims

1. A worm injection mold comprises a movable mold base (1) and a static mold base (2), wherein a hot runner system (5) is arranged on the movable mold base (1), and a movable mold core (3) communicated with the hot runner system (5) is arranged at one end, close to the static mold base (2), of the movable mold base (1); be equipped with on quiet die holder (2) with moving mold core (3) matched with quiet mold core (4), its characterized in that: two worm forming stations are arranged on the static mold core (4), and a first driver for driving the two worm forming stations to be alternately replaced is arranged on the static mold base (2); the movable mold core (3) is provided with an injection molding station and a demolding mechanism corresponding to the two worm molding stations, and the injection molding station is communicated with the hot runner system (5); when the mold is closed for the first time, the injection molding station performs injection molding towards one of the worm molding stations, and when the mold is opened, the first driver drives the two worm molding stations to change positions; when the mold is closed again, the injection molding station performs injection molding towards another worm molding station, and the demolding mechanism drives the injection molded worm to perform rotary demolding during the injection molding so as to reciprocate, and the integrated process of worm molding and demolding is realized in each mold closing process.

2. The worm injection mold of claim 1, wherein: m groups of forming cavities are symmetrically arranged on the static mold core (4) along the circumferential direction, m is an even number which is more than or equal to 2, and each worm forming station comprises m/2 groups of forming cavities; and m/2 group forming cavities of each worm forming station are arranged in sequence along the circumferential direction or are arranged in a staggered way with the m/2 group forming cavities of the other worm forming station.

3. The worm injection mold of claim 2, wherein: two groups of forming cavities which form an angle of 90 degrees are arranged on the static mold core (4) along the circumferential direction, and each group of forming cavities comprises a plurality of forming holes (4.1) which are symmetrically arranged.

4. The worm injection mold of claim 3, wherein: an insert (6) is detachably arranged in the forming hole (4.1), and a threaded through hole (6.1) for forming the external thread of the worm (100) is formed in the insert (6); the injection molding station comprises a plurality of mandrels (7) used for molding inner holes of the worm (100), and during mold closing, the mandrels (7) are inserted and matched in the threaded through holes (6.1).

5. The worm injection mold of claim 4, wherein: the demolding mechanism comprises a plurality of demolding rotating shafts (8) and a second driver (9) for driving the demolding rotating shafts (8) to rotate, one end of each demolding rotating shaft (8) is connected with the second driver (9), and the other end of each demolding rotating shaft (8) is in linkage fit with the end part of the worm (100); the position, corresponding to the demolding mechanism, of the static die holder (2) is provided with a demolding through hole (2.3) through which the worm (100) penetrates, and during die assembly, the second driver (9) drives the demolding rotating shaft (8) to rotate so as to drive the worm (100) to rotate, so that the worm and the insert (6) are separated and then penetrate out of the demolding through hole (2.3).

6. The worm injection mold of claim 5, wherein: the die is characterized in that one end of the static die holder (2), which deviates from the static die core (4), is also provided with a guide sliding groove (2.2), and the demolding through hole (2.3) is communicated with the guide sliding groove (2.2).

7. The worm injection mold of claim 5, wherein: a fixed block (10) is arranged on the movable mold core (3), and the plurality of demolding rotating shafts (8) are rotatably matched on the fixed block (10); be equipped with driven gear (8.1) on drawing of patterns pivot (8), it is equipped with driving shaft (11) to rotate on fixed block (10), the one end of driving shaft (11) is equipped with first gear (11.1) with each driven gear (8.1) engaged with, the other end of driving shaft (11) is equipped with second gear (11.2), the outside of second gear (11.2) sets drive chain (12), the other end of drive chain (12) cooperatees with the output shaft of second driver (9).

8. The worm injection mold of claim 7, wherein: a mounting hole is formed in the fixed block (10), and one end of the demolding rotating shaft (8) is axially matched in the mounting hole in a sliding manner; the outside suit of drawing of patterns pivot (8) has elastic component (13), the one end of elastic component (13) is connected on fixed block (10), and the other end is connected on driven gear (8.1) terminal surface.

9. The worm injection mold of any one of claims 1 to 8, wherein: one end of the static die holder (2) close to the movable die holder (1) is provided with an accommodating cavity (2.1), and the static die core (4) is circumferentially and rotatably arranged in the accommodating cavity (2.1); the first driver drives the moving and static mold cores (4) to rotate in a positive and negative reciprocating mode so as to achieve mutual alternate replacement of the two worm forming stations.