CN217395570U - Die for improving use strength - Google Patents

Abstract

The utility model relates to a promote mould of use intensity. The utility model relates to a mould for improving the use strength, which comprises a fixed mould component and a movable mould component; the fixed die assembly comprises a fixed die plate, a fixed die core and a shovel base; the shovel base is respectively matched and fixedly connected with the top surface of the first groove of the fixed template and the side surfaces of the two first grooves; when the fixed die assembly and the movable die assembly are assembled, the fixed die core, the movable die core and the sliding block are folded to form a die cavity; the shovel base is in fit contact with the sliding block and located on the outer side of the sliding block, and the shovel base is used for resisting the sliding block. The utility model discloses a promote mould of service strength will the location and the stress surface of shovel base increase to three, make the shovel base is moulded plastics or is received at the compound die in-process the power of slider can abundant partial pressure, prevents shovel base fracture, or take place not hard up or displacement, promoted the service strength of mould.

Description

Die for improving use strength

Technical Field

The utility model relates to a mould field especially relates to a promote mould of use intensity.

Background

The mold generally comprises a fixed mold component and a movable mold component, wherein a mold cavity is formed when the fixed mold component and the movable mold component are closed, and molten metal or non-metal material (plastic) is injected into the mold cavity by pressure to form a part product (product) with a required shape. For complex accessory products (products), particularly parts which are easy to damage and difficult to process, an insert, namely a sliding block, is required to be arranged in a mold cavity of a mold, the parts which are easy to damage and difficult to process are provided with a shovel base for resisting the sliding block, and the sliding block is prevented from moving away due to pressure when materials are injected into the mold cavity.

In the existing mold, a shovel base is fixedly connected with a fixed mold plate, the shovel base is fixedly connected with the fixed mold plate and only has one positioning surface and one stress surface, a sliding block is stressed and then is transmitted to the shovel base in the mold closing injection molding or die casting process of the mold, the shovel base is fixedly connected with the fixed mold plate and only has one positioning surface and one stress surface, if the pressure is too large in the injection molding or die casting process, the shovel base can be loosened or displaced, so that the sliding block has no stress point, the sliding block is out of position, the mold cavity is not tightly fit during injection molding or die casting, products in the mold cavity are seriously damaged, and normal beer production cannot be realized, namely accessory products (finished products) cannot be normally produced.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims at providing a promote mould of use intensity, its high pressure that can bear moulding plastics or die-casting process when the beer, use intensity is high, and is not fragile, long service life, the product quality of production is good.

A die for improving the use strength comprises a fixed die assembly and a movable die assembly;

the fixed die assembly comprises a fixed die plate, a fixed die core and a shovel base; the fixed die core is arranged in the middle of the bottom surface of the fixed die plate; a first groove is formed in the bottom surface of the fixed die plate, is a through groove and extends from the outer side surface of the fixed die plate to the fixed die core; the first groove comprises a first groove top surface and two first groove side surfaces connected with two sides of the first groove top surface; the shovel bases are respectively matched and fixedly connected with the top surfaces of the first grooves and the side surfaces of the two first grooves;

the movable mould component comprises a movable mould plate, a movable mould core and a sliding block; the movable mold core is arranged in the middle of the top surface of the movable mold plate; the top surface of the movable template is provided with a second groove which is a through groove and extends from the outer side surface of the movable template to the movable mold core; the second groove comprises a second groove bottom surface and two second groove side surfaces connected with two sides of the second groove bottom surface; the sliding block is respectively matched and slidably connected with the bottom surface of the second groove and the side surfaces of the two second grooves of the second groove, and the sliding block can slide inside and outside along the second groove;

when the fixed die assembly and the movable die assembly are assembled, the fixed die core, the movable die core, the sliding block and the shovel base are positioned between the fixed die plate and the movable die plate; the fixed die core, the movable die core and the sliding block are folded to form a die cavity; the sliding block is positioned on the outer sides of the fixed die core and the movable die core; the shovel base is in fit contact with the sliding block and located on the outer side of the sliding block, and the shovel base is used for resisting the sliding block.

In the mold in the prior art, the shovel base is fixedly connected with the top surface of the first groove in a matched manner, so that only one positioning and stress surface is arranged between the shovel base and the fixed mold plate. And the utility model discloses a promote mould of working strength, through the shovel base respectively with first recess top surface and two first recess side cooperation fixed connection will the location and the stress surface of shovel base increase to three, make the shovel base is moulded plastics at the compound die or is received at the die-casting in-process the power of slider can abundant partial pressure, prevents the fracture of shovel base, or the emergence is not hard up or the displacement, has promoted the working strength of mould.

Furthermore, the top surface of the first groove is provided with a first positioning groove, and the side surfaces of the two first grooves are provided with second positioning grooves; the shovel base is provided with a first positioning bulge and two second positioning bulges; the first positioning bulge is matched and fixedly connected with the first positioning groove, and the two second positioning bulges are respectively matched and fixedly connected with the two second positioning grooves. Through the shovel base with the fixed die plate the three screens design of first recess makes the shovel base can with fixed die plate cooperation fixed connection to accurate screens increases the shovel base with fastening between the fixed die plate ensures the atress of shovel base in the mould use can obtain the dispersion, prevents shovel base fracture, or take place to become flexible or displacement.

Furthermore, two second recess side all is equipped with first spacing arch, the slider is equipped with two first spacing recesses, first spacing arch with first spacing recess cooperation sliding connection. The first limiting protrusion and the first limiting groove are arranged, so that the sliding block can slide inside and outside the second groove of the movable template, and can be fastened with the movable template to prevent the sliding block from being separated.

Furthermore, the contact surface of the shovel base and the sliding block is an inclined surface, and the inclined surface inclines from the middle of the fixed template to the outer side direction of the movable template. The contact surface of the shovel base and the sliding block is arranged in such a way, so that the contact surface can be used as a guide surface for the shovel base to contact with the sliding block when the fixed die assembly and the movable die assembly are assembled, and the assembly is convenient; meanwhile, in the die closing process, the shovel base can push the slide block by means of the inclined surface, so that the slide block is close to the die cavity.

Furthermore, the fixed die assembly further comprises an inclined needle, the inclined needle protrudes from the top surface of the first groove and is arranged between the fixed die core and the shovel base, and the inclination direction of the inclined needle is the same as that of the contact surface of the shovel base and the sliding block; and an inclined needle through hole matched with the inclined needle penetrates through the sliding block. The oblique needle with the setting of oblique needle through-hole makes the cover half subassembly with during the movable mould subassembly compound die, the oblique needle can insert the slider in the oblique needle through-hole, work as the cover half subassembly with the compound die distance of movable mould subassembly is more close, the slider receives the guide of oblique needle, the slider to the movable mould benevolence with the cover half benevolence draws close, makes the slider the movable mould benevolence the cover half benevolence folds and forms a sealed mould die cavity.

Furthermore, a pressing block and a pressing block fixing piece are arranged in the shovel base, the pressing block is in contact with the sliding block, and the contact surface of the pressing block and the sliding block is the same as the contact surface of the shovel base and the sliding block; the pressing block fixing piece penetrates through the shovel base from the outer side of the shovel base and is connected with the pressing block. The arrangement of the pressing block and the pressing block fixing piece in the shovel base can apply acting force to the pressing block through the outside, so that the capability of the shovel base for resisting the sliding block is improved.

Furthermore, the movable die assembly also comprises a base and an ejection mechanism;

the base is U-shaped and comprises a bottom plate and two mold legs connected with two sides of the bottom plate, and the top surfaces of the two mold legs are respectively connected with the bottom surface of the movable mold plate; a through hole is formed in the middle of the bottom plate;

the ejection mechanism comprises a bottom needle plate, a surface needle plate, a back needle spring and a thimble; the bottom needle plate and the surface needle plate are arranged between the two mould feet; the bottom needle plate is arranged above the bottom plate; the surface needle plate is arranged above the bottom needle plate; the return needle and the ejector pin are arranged on the surface needle plate, and the return needle penetrates through the bottom surface of the movable template and the top surface of the movable template from bottom to top and contacts with the bottom surface of the fixed template; the needle return spring is sleeved on the needle return, and two ends of the needle return spring are respectively abutted against the surface needle plate and the movable template; the ejector pin is arranged in the middle of the surface needle plate, penetrates through the movable template and is in contact with the top surface of the movable mold core.

The ejector rod of the injection molding machine or the die casting machine can directly contact and eject the bottom needle plate through the through hole of the bottom plate, and the bottom needle plate drives the surface needle plate and the return needle and the ejector pin on the surface needle plate to eject upwards; at the moment, the return pin pushes the fixed template upwards, and simultaneously the return pin spring is compressed to gradually separate the fixed template from the movable template, the ejector pin pushes the finished product in the mold cavity out of the bottom surface of the movable mold core, and the finished product automatically falls down or is taken away by a mechanical arm; after the upper ejector is completed, an ejector rod of an injection molding machine or a die casting machine falls, and the return needle spring rebounds to drive the bottom needle plate and the surface needle plate to reset.

Furthermore, the bottom surface of the fixed die plate is provided with a guide post hole, and the top surface of the movable die plate is provided with a guide post matched with the guide post hole. The guide pillar and the guide pillar hole are arranged, so that when the fixed die assembly and the movable die assembly are assembled, the fixed die plate and the movable die plate can be accurately centered, and the movable die plate and the fixed die plate are prevented from being inclined when assembled, and the subsequent production is prevented from being influenced.

Furthermore, the fixed die assembly also comprises a sprue, a feeding channel is arranged in the middle of the top surface of the fixed die plate, and the feeding channel is communicated with the fixed die core; the sprue is arranged on the top surface of the fixed die plate and communicated with the fixed die core through the feeding channel. The sprue bushing can inject materials into the die cavity through the feeding channel, so that feeding is facilitated.

Furthermore, the fixed die plate and the movable die plate are both provided with cooling water channels, and the cooling water channels of the fixed die plate and the movable die plate are communicated with each other. And circulating cooling water in the cooling water channel to carry heat away from the mold.

For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a cross-sectional structural view of a mold for improving strength of use according to the present invention;

FIG. 2 is a bottom view of the stationary mold assembly 1 of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a side view of scoop base 13;

FIG. 5 is a top plan view of the movable die assembly 2 of FIG. 1;

FIG. 6 is a schematic cross-sectional view taken along line B-B of FIG. 5;

fig. 7 is a schematic view of sprue 15 and feed channel 113.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The words such as "first", "second", etc. and the words such as "bottom surface", "top surface", "side" etc. mentioned in the embodiments of the present invention are only for convenience of description, and those skilled in the art can replace other words without creative work, and will all belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, a mold for improving the strength of use includes a stationary mold assembly 1 and a movable mold assembly 2.

Referring to fig. 1-3, the stationary mold assembly 1 includes a stationary mold plate 11, a stationary mold core 12, and a shovel base 13; the fixed die core 12 is arranged in the middle of the bottom surface of the fixed die plate 11; a first groove 111 is formed in the bottom surface of the fixed die plate 11, and the first groove 111 is a through groove and extends from the outer side surface of the fixed die plate 11 to the fixed die core 12; the first groove 111 includes a first groove top surface 1111 and two first groove side surfaces 1112 connected to both sides of the first groove top surface 1111; shovel base 13 is fixedly connected to first groove top surface 1111 and two first groove side surfaces 1112 of first groove 111.

Referring to fig. 1, 5 and 6, the moving mold assembly 2 includes a moving mold plate 21, a moving mold core 22 and a sliding block 23; the movable die core 22 is arranged in the middle of the top surface of the movable die plate 21; the top surface of the movable die plate 21 is provided with a second groove 211, the second groove 211 is a through groove, and the outer side surface of the movable die plate 21 extends towards the movable die core 23; the second groove 211 includes a second groove bottom 2111 and two second groove side surfaces 2112 connected to both sides of the second groove bottom 2111; the slider 211 is respectively connected with the second groove 2111 connecting surface and the two second groove side surfaces 2112 of the second groove 211 in a matching and sliding manner, and the slider 23 can slide in and out along the second groove 211.

Referring to fig. 1, when the fixed mold assembly 1 and the movable mold assembly 2 are assembled, the fixed mold core 12, the movable mold core 22, the slide block 23 and the shovel base 13 are located between the fixed mold plate 11 and the movable mold plate 21; the fixed die core 12 and the movable die core 22 are closed to form a die cavity; the slide block 23 is positioned at the outer side of the mold cavity; the shovel base 13 is in fit contact with the sliding block 23 and is located on the outer side of the sliding block 23, and the shovel base 13 is used for resisting against the sliding block 23. In the present embodiment, the outer side surface of the shovel base 13, the outer side surface of the fixed die plate 11, and the outer side surface of the movable die plate 21 are flush with each other on the same outer side.

Referring to fig. 2, in the present embodiment, the bottom surface of the fixed die plate 11 is provided with 4 first grooves 111, which respectively extend from 4 outer side surfaces of the fixed die plate 11 to the fixed die core 13; the shovel bases 13 are provided with 4 shovel bases, and are respectively matched and fixedly connected with the 4 first grooves 111. Referring to fig. 6, the top surface of the movable mold plate 21 is provided with 4 second grooves 211, which extend from 4 outer side surfaces of the movable mold plate 21 to the movable mold core 23; the slider 23 is provided with 4, respectively with 4 second recess 211 cooperation sliding connection, slider 23 can be followed the inside and outside slip of second recess 211. In other embodiments, the number of the corresponding sliding blocks and the corresponding shovel bases can be set according to the actual requirements of the manufactured product.

In this embodiment, referring to fig. 1 and fig. 3, the first groove top 1111 is provided with a first positioning groove 11111; referring to fig. 2 and 3, the two first groove flanks 1112 are both provided with second positioning grooves 11121; referring to fig. 1, 3 and 4, the shovel base 13 is provided with a first positioning protrusion 131; referring to fig. 2-4, two second positioning protrusions 132; the first positioning protrusion 131 is fixedly connected to the first positioning groove 11111, and the two second positioning protrusions 132 are respectively fixedly connected to the two second positioning grooves 11121. Through the three screens design of shovel base 13 and fixed die plate 11's first recess 111, make shovel base 13 can cooperate fixed connection with fixed die plate 11 to accurate screens increases the fastening between shovel base 13 and the fixed die plate 11, ensures that the atress of shovel base 13 in the mould use can obtain the dispersion, prevents that shovel base 13 fracture, or takes place to become flexible or the displacement.

Referring to fig. 5 and 6, the two second groove side surfaces 2112 are respectively provided with a first limiting protrusion 21121, the slider 23 is provided with two first limiting grooves 231, and the first limiting protrusion 21121 is in sliding connection with the first limiting grooves 231.

Referring to fig. 1, in the present embodiment, a contact surface between the shovel base 13 and the slider 23 is an inclined surface, and the inclined surface is inclined from the middle of the fixed die plate 11 to the outer side of the movable die plate 12.

In this embodiment, referring to fig. 1 and 2, the stationary die assembly 1 further includes an inclined pin 14, the inclined pin 14 protrudes from a top surface 1111 of the first groove 111 and is disposed between the stationary die core 12 and the shovel base 13, and an inclined direction of the inclined pin 14 is the same as an inclined direction of a contact surface between the shovel base 13 and the slider 23; referring to fig. 1 and 5, a needle through hole 232 is formed in the slider 23 to engage with the needle 14.

Referring to fig. 1, in the present embodiment, a pressing block 133 and a pressing block fixing member 134 are disposed in the shovel base 13, the pressing block 133 contacts with the slider 23, and a contact surface of the pressing block 133 and the slider 23 is coplanar with a contact surface of the shovel base 13 and the slider 23; the pressing block fixing piece 134 penetrates into the shovel base 13 from the outer side of the shovel base 13 and is connected with the pressing block 133. The arrangement of the pressing block 133 and the pressing block fixing piece 134 in the shovel base 13 can apply acting force to the pressing block 133 through the outside, so that the capability of the shovel base 13 for resisting the sliding block 23 is improved.

Referring to fig. 1, in the present embodiment, the movable mold assembly 2 further includes a base 24 and an ejection mechanism 25.

The base 24 is U-shaped, and includes a bottom plate 241 and two mold legs 242 connected to two sides of the bottom plate 241, and top surfaces of the two mold legs 242 are connected to a bottom surface of the movable mold plate 21 respectively; a through hole (not shown) is formed at the middle portion of the bottom plate 241.

The ejection mechanism 25 comprises a bottom needle plate 251, a surface needle plate 252, a back needle 253, a back needle spring 254 and an ejector pin 255; the bottom pin plate 251 and the face pin plate 252 are both disposed between the two mold feet 242; the bottom plate 251 is disposed above the bottom plate 241; the surface needle plate 252 is arranged above the bottom needle plate 251; the return needle 253 and the thimble 255 are arranged on the needle board, and the return needle 253 passes through the bottom surface of the movable template 21 and the top surface of the movable template 21 from bottom to top and contacts with the bottom surface of the fixed template 11; the needle return spring 254 is sleeved on the needle return 253, and two ends of the needle return spring 254 are respectively abutted against the needle board 252 and the movable template 21; the thimble 255 is disposed in the middle of the needle plate 252, and the thimble 255 passes through the moving die plate 21 and the moving die core 22 and contacts with the top surface of the moving die core 22.

In this embodiment, the bottom plate 241, the mold legs 242, and the movable mold plate 251 are fastened and connected by screws; the top template 21 is tightly connected with the fixed mold core 12 and the movable template 21 is tightly connected with the movable mold core through screws. The first positioning protrusion 231 of the shovel base 23 is also tightly connected with the first groove top surface 1111 of the first groove of the fixed die plate 11 through a screw.

In the present embodiment, the needle return 253 and the needle return spring 254 are provided in 4 numbers, respectively, at the positions of the four corners of the needle plate 253, respectively; in fig. 1, only 1 return pin 253 and a return pin spring 254 are shown in fig. 1 for the sake of convenience in viewing other structures.

In the present embodiment, please refer to fig. 5, the bottom surface of the fixed mold plate 11 is provided with a guide post hole 112, and referring to fig. 6, the top surface of the movable mold plate 21 is provided with a guide post 212 matching with the guide post hole.

Referring to fig. 7, in the present embodiment, the stationary mold assembly further includes a sprue 15, a feeding channel 113 is disposed in the middle of the top surface of the stationary mold plate 11, and the feeding channel 113 is communicated with the stationary mold core 12; the sprue 15 is arranged on the top surface of the fixed die plate 11, and the sprue 15 is communicated with the fixed die core 12 through a feeding channel 113.

In the present embodiment, the stationary platen 11 and the movable platen 21 are provided with cooling water passages (not shown).

Referring to fig. 1, in the present embodiment, code mold grooves 2421 are disposed on the outer sides of the two mold legs 241.

The working process of the die for improving the use strength of the embodiment is as follows:

and (3) closing the fixed die assembly 1 and the movable die assembly 2, and fixing the code die groove 2421 with an injection molding machine or a die-casting machine through a code die. The injection molding machine or die casting machine melts the material at high temperature, and the material enters the die cavity from the sprue 15 through the feeding channel 113 through high pressure of the injection nozzle of the injection molding machine or die casting machine; keeping the pressure for a certain time by an injection molding machine or a die casting machine, and cooling and molding the material in the die cavity of the die through a cooling water channel (finished product); then, the fixed die assembly 1 and the movable die assembly 2 are gradually separated by pulling a power arm of the injection molding machine or the die casting machine, and the inclined needle 14 on the fixed die plate 11 guides the sliding block 13 to be separated from the fixed die core 12 and the movable die core 22 until the fixed die assembly 1 and the movable die assembly 2 are separated to a set distance of the injection molding machine or the die casting machine; under the pushing of a top roller of an injection molding machine or a die casting machine, the bottom needle plate 251 and the surface needle plate 252 are pushed upwards, the needle return spring 254 is compressed, the ejector pins 255 push out finished products, and the finished products automatically fall down or are taken away by a manipulator; the top roller of the injection molding machine or the die casting machine is reset, and the needle returning spring 254 rebounds to reset the bottom needle plate 251 and the face needle plate 252; and (3) closing the fixed die assembly 1 and the movable die assembly 2, and starting the next injection molding or die casting to produce a product.

Compared with the prior art, the utility model discloses a promote mould of service strength, through with the location and the stress surface of shovel base increase to three, will during the beer shovel base is pushed down the holding power of slider disperses the stress surface of 3 location, when fully decomposing die casting machine or injection molding machine beer the slider conducts the injection pressure of shovel base for the service strength of mould when beer is high, and is not fragile, reduces the maintenance, prolongs the life of mould.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, to those skilled in the art, changes and modifications may be made without departing from the spirit of the invention, and it is intended that the invention also encompass such changes and modifications.

Claims (10)

1. The utility model provides a promote mould of working strength which characterized in that: the device comprises a fixed die assembly and a movable die assembly;

the fixed die assembly comprises a fixed die plate, a fixed die core and a shovel base; the fixed die core is arranged in the middle of the bottom surface of the fixed die plate; a first groove is formed in the bottom surface of the fixed die plate, is a through groove and extends from the outer side surface of the fixed die plate to the fixed die core; the first groove comprises a first groove top surface and two first groove side surfaces connected with two sides of the first groove top surface; the shovel bases are respectively matched and fixedly connected with the top surfaces of the first grooves and the side surfaces of the two first grooves;

the movable mould component comprises a movable mould plate, a movable mould core and a sliding block; the movable mold core is arranged in the middle of the top surface of the movable mold plate; the top surface of the movable mould plate is provided with a second groove which is a through groove and extends from the outer side surface of the movable mould plate to the movable mould core; the second groove comprises a second groove bottom surface and two second groove side surfaces connected with two sides of the second groove bottom surface; the sliding block is respectively matched and slidably connected with the bottom surface of the second groove and the side surfaces of the two second grooves of the second groove, and the sliding block can slide inside and outside along the second groove;

when the fixed die assembly and the movable die assembly are assembled, the fixed die core, the movable die core, the sliding block and the shovel base are positioned between the fixed die plate and the movable die plate; the fixed die core, the movable die core and the sliding block are folded to form a die cavity; the sliding block is positioned on the outer sides of the fixed die core and the movable die core; the shovel base is in fit contact with the sliding block and located on the outer side of the sliding block, and the shovel base is used for resisting the sliding block.

2. The mold for improving in-use strength according to claim 1, wherein: the top surface of the first groove is provided with a first positioning groove, and the side surfaces of the two first grooves are provided with second positioning grooves; the shovel base is provided with a first positioning bulge and two second positioning bulges; the first positioning bulge is matched and fixedly connected with the first positioning groove, and the two second positioning bulges are respectively matched and fixedly connected with the two second positioning grooves.

3. The mold for improving in-use strength according to claim 1, wherein: two the second recess side all is equipped with first spacing arch, the slider is equipped with two first spacing recesses, first spacing arch with first spacing recess cooperation sliding connection.

4. The die for improving service strength according to claim 1, wherein: the contact surface of the shovel base and the sliding block is an inclined surface, and the inclined surface inclines from the middle of the fixed template to the outer side direction of the movable template.

5. The die for improving service strength according to claim 4, wherein: the fixed die assembly further comprises an inclined needle, the inclined needle protrudes out of the top surface of the first groove and is arranged between the fixed die core and the shovel base, and the inclined direction of the inclined needle is the same as the inclined direction of the contact surface of the shovel base and the sliding block; and an inclined needle through hole matched with the inclined needle penetrates through the sliding block.

6. The die for improving service strength according to claim 1, wherein: a pressing block and a pressing block fixing part are arranged in the shovel base, the pressing block is in contact with the sliding block, and the contact surface of the pressing block and the sliding block is the same as the contact surface of the shovel base and the sliding block; the pressing block fixing piece penetrates into the shovel base from the outer side of the shovel base and is connected with the pressing block.

7. The mold for improving in-use strength according to claim 1, wherein: the movable die assembly further comprises a base and an ejection mechanism;

the base is U-shaped and comprises a bottom plate and two mold legs connected with two sides of the bottom plate, and the top surfaces of the two mold legs are respectively connected with the bottom surface of the movable mold plate; a through hole is formed in the middle of the bottom plate;

the ejection mechanism comprises a bottom needle plate, a surface needle plate, a back needle spring and a thimble; the bottom needle plate and the surface needle plate are arranged between the two mould feet; the bottom needle plate is arranged above the bottom plate; the surface needle plate is arranged above the bottom needle plate; the return needle and the ejector pin are arranged on the surface needle plate, and the return needle penetrates through the bottom surface of the movable template and the top surface of the movable template from bottom to top and contacts with the bottom surface of the fixed template; the needle return spring is sleeved on the needle return, and two ends of the needle return spring are respectively abutted against the surface needle plate and the movable template; the ejector pin is arranged in the middle of the surface needle plate, penetrates through the movable template and the movable mould core and is in contact with the top surface of the movable mould core.

8. The mold for improving in-use strength according to claim 1, wherein: the bottom surface of the fixed die plate is provided with a guide post hole, and the top surface of the movable die plate is provided with a guide post matched with the guide post hole.

9. The mold for improving in-use strength according to claim 1, wherein: the fixed die assembly further comprises a sprue, a feeding channel is arranged in the middle of the top surface of the fixed die plate and communicated with the fixed die core; the sprue is arranged on the top surface of the fixed die plate, and the sprue is communicated with the fixed die core through the feeding channel.

10. The die for improving service strength according to claim 1, wherein: the fixed die plate and the movable die plate are both provided with cooling water channels, and the cooling water channels of the fixed die plate and the movable die plate are communicated.

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