CN107009581A - It is a kind of to realize the injection mold that spot pouring mouth waste material safely, conveniently comes off - Google Patents

Abstract

The invention provides an injection mold for realizing the safe and convenient fall-off of point gate waste, which includes a movable mold part and a fixed mold part, and the fixed mold part includes a fixed mold core part and a sprue sleeve part; the movable mold part and the fixed mold part A pull hook structure is arranged between the parts, and the pull hook structure includes a pull hook, a pressing hook and a movable tongue; the movable tongue is telescopically arranged in the fixed mold core part, and one end protrudes from the fixed mold core part; one end of the pull hook is connected to For the movable mold part, the other end extends to the fixed mold part and hooks the side of the movable tongue facing away from the movable mold part. The movable mold part is connected to the core part of the fixed mold part; Partial extension; when the mold is opened, the fixed mold core part and the sprue sleeve part are parted until the other end of the pressure hook is pressed on the side of the movable tongue facing the movable mold part, and the movable tongue is pressed into the fixed mold core part , the pull hook is separated from the movable tongue, and the movable mold part and the fixed mold core part are divided.

Description

An injection mold that realizes safe and convenient shedding of point gate waste

technical field

The invention relates to the technical field of mold design, in particular to an injection mold for realizing safe and convenient shedding of point gate waste.

Background technique

In the mold, the connection area between the point gate and the plastic part is small, so it is easier to separate them when the mold is opened, and they are separated from the mold. This mold structure is conducive to improving production efficiency and mold operation safety. Realize automatic production. Common point gate stripping molds include the following two types:

1. Typical three-plate mold

As shown in Figure 1, when the mold is opened, with the help of the recovery of the elastic force of the compression spring, the parting of the A-A surface is opened. Since the connection between the nozzle of the injection machine and the sprue sleeve is molten plastic, after the parting of the A-A surface, the gate waste It must remain in the taper hole of the point gate with the cavity plate; as the mold opening continues, when the limit pin 01 touches the left end surface of the pull ring 02, the parting of the A-A surface is completed, and the B-B is opened; After the molding is completed, it is necessary to extend the arm into the A-A surface and use the pliers to clamp out the point gate waste; this operation greatly increases the labor intensity.

2. Pull ring type point gate automatic demoulding mold

As shown in Figure 2, when the mold is opened, the C-C surface is opened first, the plastic part is tightly wrapped by the core, and the follow-up mold moves to the left, and then the B-B parting surface is opened again; due to the action of part 03, the runner waste is Pull out the tapered hole of the point gate and cling to the left end surface of part 3; continue to open the mold, due to the action of parts 04, 05 and 06, the gate waste is quickly unloaded from the ball head of part 03 by part 05 and falls by itself ; It can be seen from Figure 2 that although the point gate waste can be removed by the cavity plate, the fixed and movable molds (that is, the C-C parting surface) are connected by the pull ring 07. Since the pull ring cannot be made long enough, Therefore, during parting, the fixed and movable molds cannot be completely separated, and the travel switch must be used to realize the start and stop of the movement between the movable and fixed molds, which brings unsafe factors to the operation of the machine tool, such as operator errors or forming switches. Failure will cause the moving distance between the movable and fixed molds to exceed the limit range of the pull ring, thereby causing serious damage to the mold; in addition, since the separation distance between the movable and fixed molds is limited by the pull ring, it is inconvenient to take out the workpiece.

Contents of the invention

In order to solve the problems in the background technology, the present invention provides an injection mold for realizing the safe and convenient shedding of point gate waste, which includes a movable mold part and a fixed mold part, and the fixed mold part includes a fixed mold core part and a pouring mold part. muzzle part;

A draw hook structure is provided between the movable mold part and the fixed mold part, and the draw hook structure includes a draw hook, a pressing hook and a movable tongue; the movable tongue is telescopically arranged on the fixed mold core part, and One end protrudes from the core part of the fixed mold; one end of the drag hook is connected to the movable mold part, and the other end extends to the fixed mold part and hooks the side of the movable tongue facing away from the movable mold part. The movable mold part and the fixed mold part are in a tight state before the mold is opened; one end of the pressure hook is connected to the sprue bushing part, and the other end extends toward the movable mold part;

When the mold is opened, the fixed mold core part and the sprue sleeve part are parted first, until the other end of the pressure hook is pressed on the side of the movable tongue facing the movable mold part, and pressed When the movable tongue protrudes into the fixed mold core part, the pull hook is separated from the movable tongue, and the movable mold part is separated from the fixed mold core part.

Preferably, a chute is provided on the core part of the fixed mold, and one end of the movable tongue extends into the chute, and an elastic structure is arranged with the bottom of the chute, when the movable tongue extends into the chute The elastic structure undergoes compression deformation.

Preferably, the movable tongue extends into the chute, the side wall of the movable tongue is provided with a limit groove, the inner wall of the chute is provided with a limit pin, and one end of the limit pin extends into the inside the limit slot.

Preferably, the side of the protruding end of the movable tongue facing the movable mold part is a first slope, and the other end of the pressing hook is provided with a second slope matching the first slope. The two slopes slide along the first slope, and press the movable tongue to retract into the fixed core part.

Preferably, a first guiding and limiting structure is provided between the fixed mold core part and the sprue sleeve part, which is used for guiding and positioning during parting between the fixed mold core part and the sprue sleeve part. The limit of the parting stroke.

Preferably, the first guiding and limiting structure includes a coupling shaft, one end of the coupling shaft is fixed on the sprue sleeve part, and the other end moves through the fixed mold core part and the movable mold part; The other end of the connecting shaft is also provided with a limit nut, the part between the fixed mold core part and the sprue bushing part is split, and the fixed mold core part moves along the connecting shaft to the limit The bit nut bears against the fixed mold part, and the fixed mold core part stops moving relative to the sprue sleeve part.

Preferably, the sprue sleeve part includes a discharge part and a feed part, and one end of the pressure hook is connected to the feed part; the feed part includes a sprue sleeve and is used for fixing the sprue The fixed die plate of the mouth sleeve, the discharge part includes a discharge ring and a sprue stripping plate for fixing the discharge ring; one end of the sprue sleeve is fixed with the fixed die plate, and the other end Through the unloading ring and extend into the fixed mold core part, the unloading part and the feeding part are parted, and the unloading ring cooperates with the sprue sleeve to remove the other end of the sprue sleeve. Connected waste.

Preferably, a second guiding and limiting structure is provided between the unloading part and the feeding part, which is used for guiding and parting stroke during parting between the unloading part and the feeding part limit.

Preferably, the second guiding and limiting structure includes a discharge sleeve, one end of the discharge sleeve is fixed on the gate stripper plate, and the other end extends into the shaft provided on the fixed template. In the sleeve hole; the end of the discharge sleeve extending into the sleeve hole is provided with a flange edge, and the sleeve hole is a stepped hole; the discharge part and the feed part are typed, until the The flange edge is pressed on the step of the stepped hole, and the gate stripping is completed.

Preferably, the other end of the sprue sleeve is provided with an inverted cone structure for pulling out waste.

Preferably, guide pillars and inclined guide pillars for guiding and positioning are also provided between the movable mold part and the fixed mold part.

Compared with the prior art, the present invention has the advantages and positive effects of:

The injection mold provided by the present invention to realize the safe and convenient shedding of point gate waste is a mold with multiple parting surfaces, and the parting surfaces are sequentially separated; Fix the core part of the mold, so as to facilitate the automatic shedding of waste materials, without manually clamping the waste materials through pliers, which greatly reduces the labor force;

On the other hand, the connection and parting of the movable mold part and the fixed mold part are realized through the hook structure, and the two can be completely separated when the mold is opened. Compared with the pull-ring connection method in the prior art, The invention does not need to control the stroke between the movable and fixed molds, and avoids the problem that the moving distance between the movable and fixed molds exceeds the limit range of the pull ring due to stroke control failure and other reasons, thereby causing serious damage to the molds, and completely eliminates the problem. It eliminates the unsafe factors brought by machine tool operation, ensures the stability of the work, ensures that the mold is not damaged, and effectively improves the service life of the mold; moreover, the moving and fixed molds can be completely separated when the mold is opened, and it is more convenient to take out the moving mold. A workpiece that is ejected from a core.

Description of drawings

The above and other features and advantages of the present invention can be more clearly understood through the following detailed description in conjunction with the accompanying drawings, wherein:

Fig. 1 is the structural representation of three-plate formwork in the prior art;

Fig. 2 is the structural representation of the pull ring type point gate automatic demoulding mold in the prior art;

Fig. 3 is the structural representation of the injection mold that realizes point gate waste safe, convenient fall-off provided by the present invention;

Fig. 4 is a schematic diagram of an injection mold that realizes the safe and convenient falling off of point gate waste provided by the present invention;

Fig. 5 is a schematic diagram of the secondary parting of the injection mold that realizes the safe and convenient fall-off of point gate waste provided by the present invention;

Fig. 6 is a schematic diagram of the third parting of the injection mold that realizes the safe and convenient fall-off of point gate waste provided by the present invention;

Fig. 7 is the structural representation of drag hook among the present invention;

Fig. 8 is a structural schematic diagram of the middle pressure hook of the present invention;

Fig. 9 is a schematic structural view of a sprue sleeve in the present invention;

Fig. 10 is the front view of movable tongue among the present invention;

Figure 11 is a side view of the movable tongue in the present invention.

detailed description

The invention will be described in more detail hereinafter with reference to the accompanying drawings showing embodiments of the invention. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In these drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.

Referring to Fig. 3-11, the present invention provides an injection mold for realizing the safe and convenient shedding of point gate waste, including a movable mold part and a fixed mold part, and the fixed mold part includes a fixed mold core part and a sprue sleeve part; a drag hook structure is arranged between the movable mold part and the fixed mold part, and the drag hook structure includes a drag hook 26, a pressing hook 1 and a movable tongue 2; the movable tongue 2 is telescopically arranged on the fixed mold core part, and one end extends out Model core part; one end of drag hook 26 is connected to the movable mold part, and the other end extends to the fixed mold part and hooks the side of the movable tongue 2 facing away from the movable mold part, and the movable mold part is connected to the fixed mold core part; one end of the pressing hook 1 Connect the sprue sleeve part, and the other end extends to the movable mold part. When opening the mold, the fixed mold core part and the sprue sleeve part are separated first, and after the fixed mold core part and the sprue sleeve part are separated for a certain distance, the other end of the pressure hook 1 is pressed on the side of the movable tongue 2 facing the movable mold part. , and press the movable tongue 2 into the fixed mold core part, the drag hook 26 is separated from the movable tongue 2, and the movable mold part and the fixed mold core part are parted.

The present invention is a mold with multiple parting surfaces, and the parting surfaces are sequentially separated; on the one hand, the fixed mold core part is separated from the sprue bushing part to realize the separation of the waste material from the fixed mold core part, thereby facilitating the automatic falling off of the waste material without manual work Clamping out the waste with pliers greatly reduces the labor force; on the other hand, the connection and parting are realized between the movable mold part and the fixed mold part through the hook structure, and the two can be completely separated when the mold is opened. In the prior art, the pull ring type connection mode (such as shown in Figure 2), the present invention does not need to control the stroke between the movable and fixed molds, and avoids the moving distance between the movable and fixed molds due to stroke control failure and other reasons. Exceeding the limited range of the pull ring, thus causing serious damage to the mold, completely eliminating the unsafe factors brought about by the operation of the machine tool, ensuring the stability of the work, ensuring that the mold is not damaged, and effectively improving the service life of the mold ; Moreover, the movable and fixed molds can be completely separated when the mold is opened, and it is more convenient to take out the workpiece ejected from the driven mold core.

In this embodiment, as shown in FIG. 3 , the fixed mold part includes a fixed mold core part and a sprue sleeve part which are sequentially connected.

Wherein, fixed model core part further comprises fixed model core 9, fixed model core fixed plate 10 and pressing plate 5, fixed model core 9 is fixed on the fixed model core fixed plate 10, and fixed model core fixed plate 10 is connected with pressing plate 5 again.

Wherein, the sprue sleeve part further includes a discharge part and a feed part, the feed part includes a sprue sleeve 8 and a fixed die plate 4 for fixing the sprue sleeve, and the unloading part includes a discharge ring 7 and a The sprue stripping plate 6 on the fixed unloading ring 7; one end of the sprue bushing 8 is fixed on the fixed mold plate 4, and the other end passes through the unloading ring 7 and extends into the core part of the fixed mold (specifically, it extends through the pressing plate 5 Into the fixed model core 9); the unloading part and the feeding part will also produce parting, and the unloading ring 7 and the sprue sleeve 8 are used to unload the waste material that is carried out on the other end of the sprue sleeve.

In this embodiment, as shown in Fig. 3, the movable mold part includes a movable mold core, a spacer 17, a bottom plate 18, a reset rod 19, a push rod 20, a push rod fixing plate 21, a rear push plate 22, a small core 23. Slider 24, etc.; the movable mold part and the fixed mold part are also provided with an inclined guide column 25 for guiding and positioning, one end of the inclined guide column 25 is fixed on the fixed mold part, and the other end is inserted into the slider of the movable mold part 24 in the inclined guide post jack.

The specific structural form of the above-mentioned movable mold part and fixed mold part is only an embodiment. Of course, in other embodiments, the specific structural forms of the movable mold part and the fixed mold part can be adjusted according to specific conditions, and are not limited here.

In this embodiment, a chute is provided on the core part of the fixed mold, and one end of the movable tongue 2 extends into the chute, and an elastic structure is arranged on the bottom of the chute. When the movable tongue 2 extends into the chute, the elastic structure compresses and deforms. In order to provide a restoring force for the subsequent reset of the movable tongue 2; wherein, the chute is specifically arranged on the fixing plate 10 of the fixed mold core. Further, the movable tongue 2 extends into the chute, the side wall of the movable tongue 2 is provided with a limit groove 201, the inner wall of the chute is provided with a limit pin 3, and one end of the limit pin 3 extends into the limit groove 201; When the movable tongue 2 moves into the chute of the mounting hole, one end of the limit pin 3 slides along the limit groove 201 until the limit pin contacts the upper end of the limit groove 201, and the movable tongue 2 stops moving, thereby achieving control The role of active tongue stroke.

Further, the side of the protruding end of the movable tongue 2 facing away from the movable mold part is a plane, one end of the draw hook 26 is fixed on the movable mold part, and the other end is hooked on the plane of the protruding end of the movable tongue 2; the movable tongue 2 stretches out The side facing the movable mold part is the first slope, one end of the pressure hook 1 is connected to the fixed mold plate 4 of the feeding part, and the other end is provided with a second slope matching the first slope, when the second slope matches the first After the contact of the inclined surfaces, the second inclined surface slides along the first inclined surface, and presses the movable tongue 2 to extend into the fixed mold core fixing plate. The present invention facilitates the pressing hook to move smoothly through the setting of the first inclined surface and the second inclined surface. The movable tongue 2 is pressed into the fixed plate of the fixed mold core, thereby facilitating the smooth disengagement between the drag hook 26 and the movable tongue 2 .

Further, in this embodiment, the specific structural form of the movable tongue 2 is shown in Figures 10-11, and the movable tongue has a certain width; the specific structural form of the drag hook 26 is shown in Figure 7, which has a hook at one end The single-rod structure; the specific structural form of the pressure hook 1 is a double-rod structure as shown in Figure 8, which has two extended hooks, and the setting of the two hooks is convenient for smooth and stable pressing of the movable tongue 2, of course In other embodiments, the pressing hook can also be a single-rod structure, which is not limited here.

In this embodiment, a first guiding and limiting structure is provided between the fixed mold core part and the sprue sleeve part, which is used for guiding when the fixed mold core part and the sprue sleeve part are separated, and for aligning the fixed mold core part. Control of the separation stroke d2 between the part and the sprue bushing part.

Wherein, the first guiding and limiting structure includes a coupling shaft 15, one end of the coupling shaft 15 is fixed on the sprue bushing (specifically fixed on the sprue stripping plate 6 by screws 13), and the other end moves through the fixed mold The core part and the movable mold part; the other end of the coupling shaft 15 is also provided with a limit nut 16, the fixed mold core part is separated from the sprue bushing part, and the fixed mold core part moves along the coupling shaft 15 until the limit nut 16 Stay on the left end face of the fixed model part (that is, the end face of the fixed model core fixed plate facing the end face of the movable mold part), the fixed model core part stops moving relative to the sprue sleeve part, and the gap between the fixed model core part and the sprue sleeve part The separation is complete.

Certainly, in other embodiments, the implementation manner of the first guiding and limiting structure is not limited to the above, and can be adjusted according to specific circumstances, and no limitation is set here.

In this embodiment, a second guiding and limiting structure is provided between the unloading part and the feeding part, which is used for guiding when parting between the unloading part and the feeding part, and for guiding between the unloading part and the feeding part. Control of parting stroke d1 between parts.

Wherein, the second guiding and limiting structure includes a discharge bushing 14, one end of the discharge bushing 14 is fixed on the gate stripping plate 6 by a screw 13, and the other end extends into the bushing hole provided on the fixed mold puller 4. 401; one end of the discharge shaft sleeve 14 stretching into the sleeve hole 401 is provided with a flange 1401, and the shaft sleeve hole 401 is a stepped hole; the discharge part and the feed part are typed, and the discharge shaft sleeve 14 is along The sleeve hole 401 moves until the flange edge 1401 presses on the step of the stepped hole, and the parting ends.

Certainly, in other embodiments, the implementation manner of the second guiding and limiting structure is not limited to the above, and can be adjusted according to specific circumstances, and no limitation is set here.

In this embodiment, referring to FIG. 9 , the other end of the sprue bushing 8 is provided with an inverted cone structure 801 for pulling out waste; For example, item 03) in Fig. 2, the present invention directly pulls out the waste material 27 through the backtracking structure.

Further, 5° is optimal for the inverted cone structure 801 , as shown in FIG. 9 ; of course, in other embodiments, the angle of the inverted cone structure can also be adjusted according to specific conditions, which is not limited here.

In this embodiment, the mold also includes a guide post 12, which is used for connecting between the fixed mold core part and the sprue bushing part, between the discharge part and the feeding part, and between the movable mold part and the fixed mold core part. Guide positioning during mold opening/closing, specific fixed mold part, sprue bushing part, unloading part and movable mold part are all provided with guide sleeve 11, and one end of guide post 12 is fixed on the fixed mold puller of fixed mold part 4, the other end stretches into the guide sleeve 11.

Below in conjunction with Figures 3-6, the working principle of the injection mold that realizes the safe and convenient shedding of point gate waste provided by the present invention will be further explained:

1. First typing

Initially, the movable tongue 2 is caught by the draw hook 26, thereby realizing the connection of the movable mold part and the fixed mold core part, as shown in Figure 3; the movable mold part moves to the left, and the draw hook 26 drives the fixed mold core part to move to the left, In this way, the fixed mold core part is separated from the sprue sleeve part, the A-A parting surface is opened, and the first parting is completed, as shown in Figure 4; during this process, the sprue sleeve 8 pulls out the gate waste 27 through the inverted cone structure 801 .

2. Secondary classification

After the first parting of the distance d2, the left end surface of the fixed mold core fixing plate 10 contacts the limit nut 16, and the movable mold part and the fixed mold core part cannot be further separated; Drag the stripping part to move to the left, the stripping part is separated from the feeding part, the B-B parting surface is opened, and the secondary parting is completed, as shown in Figure 5; during this process, the unloading ring 7 is relatively 8 moves to the left, and the waste material 27 is unloaded from the inverted cone of the sprue bushing 8. (Note: Due to the high speed of movement, the gate waste will pop out of the right taper hole of the sprue sleeve and land.)

3. Three classifications

During the separation process of the stripping part and the feeding part, the pressing hook 1 is in contact with the movable tongue 2, and presses the movable tongue 2 to lock the core part of the model; The flange edge 1401 is pressed onto the step of the sleeve hole 401, and the A-A and B-B partings are all completed. At this time, the movable tongue 2 moves just to separate from the hook 26; The part is completely separated from the fixed core part, as shown in FIG. 6 .

4. Mold closing

As the moving mold part moves to the right, the pressure exerted by the hook 1 on the movable tongue 2 disappears, and the movable tongue 2 is quickly detached from the pressure hook 1 and pops up to the uppermost position. And be close to the right side working surface of drag hook 26 after bouncing again soon (promptly return to Fig. 3 initial state).

Those skilled in the art will appreciate that the present invention may be embodied in many other specific forms without departing from the spirit or scope of the invention. Although embodiments of the present invention have been described, it should be understood that the present invention should not be limited to these embodiments, and that changes and modifications may be made by those skilled in the art within the spirit and scope of the invention as defined by the appended claims.

Claims (11)

1. a kind of realize the injection mold that spot pouring mouth waste material safely, conveniently comes off, it is characterised in that includes dynamic model part and fixed Mould part, the cover half part includes fixed mold part and sprue bush part；

Hook structure is provided between the dynamic model part and the cover half part, the hook structure includes drag hook, pressure hook And active tongue；The active tongue is telescopic to be arranged on the fixed mold part, and the fixed mold portion is stretched out in one end Point；One end of the drag hook connects the dynamic model part, and the other end extends to the cover half part and hooks the movable back To the side of the dynamic model part, tight state is closed in the dynamic model part with being in before the die sinking of the cover half part；The pressure hook One end connects the sprue bush part, and the other end extends to the dynamic model part；

During die sinking, first parting between the fixed mold part and the sprue bush part, the other end to the pressure hook is pressed in The active tongue press against the active tongue and put in the fixed mold part towards on the side of the dynamic model part, institute State drag hook to separate with the active tongue, the dynamic model part and fixed mold part parting.

2. according to claim 1 realize the injection mold that spot pouring mouth waste material safely, conveniently comes off, it is characterised in that institute State and chute is provided with fixed mold part, one end of the active tongue is put in the chute, and set with the chute bottom Elastic construction is put, the active tongue puts in elastic construction during chute and occurs compressive deformation.

3. according to claim 1 or 2 realize the injection mold that spot pouring mouth waste material safely, conveniently comes off, it is characterised in that The active tongue is put in the chute, is provided with the activity tongue side wall on stopper slot, the chute inwall and is provided with one Spacer pin, described spacer pin one end is put in the stopper slot.

4. according to claim 1 or 2 realize the injection mold that spot pouring mouth waste material safely, conveniently comes off, it is characterised in that The active tongue external part is one first inclined-plane towards the side of the dynamic model part, is provided with and institute on the pressure hook other end The second inclined-plane of the first inclined-plane matching is stated, second inclined-plane is slided along first inclined-plane, and press against the active tongue contracting Enter in the fixed mold part.

5. according to claim 1 realize the injection mold that spot pouring mouth waste material safely, conveniently comes off, it is characterised in that institute State and the first guide and limit structure be set between fixed mold part and the sprue bush part, for the fixed mold part with Guiding and parting stroke between the sprue bush part during parting it is spacing.

6. according to claim 5 realize the injection mold that spot pouring mouth waste material safely, conveniently comes off, it is characterised in that institute State the first guide and limit structure and include a coupling spindle, one end of the coupling spindle is fixed on sprue bush part, the other end is lived Move through the fixed mold part and the dynamic model part；A stop nut is additionally provided with the other end of the coupling spindle, Parting between the fixed mold part and the sprue bush part, the fixed mold part is moved along the coupling spindle, To the stop nut prop up it is described determine model part, the fixed mold part stops relative to sprue bush part shifting It is dynamic.

7. the injection mold that spot pouring mouth waste material safely, conveniently comes off is realized according to claim 1 or 5, it is characterised in that The sprue bush part includes discharging part and feeding part, and one end of the pressure hook is connected on the feeding part；Institute State feeding part to include sprue bush and pull for the cover half for fixing sprue bush, the discharging part includes discharging ring and is used for The cast gate stripper plate of the fixed discharging ring；Fixation is pulled in one end of the sprue bush with the cover half, and the other end is unloaded through described Feed ring puts in the fixed mold part, the discharging part and feeding part parting, and the discharging ring is matched somebody with somebody with the sprue bush Close the waste material laid down and connected on the sprue bush other end.

8. according to claim 7 realize the injection mold that spot pouring mouth waste material safely, conveniently comes off, it is characterised in that institute State and the second guide and limit structure is provided between discharging part and the feeding part, for the discharging part and the charging Guiding and parting stroke between part during parting it is spacing.

9. according to claim 8 realize the injection mold that spot pouring mouth waste material safely, conveniently comes off, it is characterised in that institute State the second guide and limit structure and include discharging axle sleeve, one end of the discharging axle sleeve is fixed on the cast gate stripper plate, separately One end is put in the axle sleeve hole set on the solid plate；The discharging axle sleeve puts on one end of the axle sleeve hole and is provided with method Lan Bian, the axle sleeve hole is a shoulder hole；Discharging part and the feeding part parting, the ladder is pressed in the flange On the step in hole, cast gate, which takes off material, to be terminated.

10. according to claim 7 realize the injection mold that spot pouring mouth waste material safely, conveniently comes off, it is characterised in that institute The circle of the other end one for stating sprue bush is provided for pulling out the back taper structure of waste material.

11. according to claim 1 realize the injection mold that spot pouring mouth waste material safely, conveniently comes off, it is characterised in that institute State the guide pillar and Angle Pin being additionally provided between dynamic model part and the cover half part for being oriented to, positioning.