CN217834376U - Demolding device and mold - Google Patents

Abstract

The utility model belongs to the technical field of mould production, a demoulding device and a mould are disclosed, wherein the demoulding device comprises a jacking mechanism, a driving mechanism, a pressure sensor and a controller, and the jacking mechanism is used for jacking a formed product along the vertical direction for demoulding; the driving mechanism is used for driving the jacking mechanism to do ascending motion along the vertical direction; the pressure sensor is arranged on the jacking mechanism and used for detecting the pressure value applied to the jacking mechanism by the molded product; the controller is respectively electrically connected with the driving mechanism and the pressure sensor. Compared with the prior art, when the demoulding device is provided with the pressure sensor on the jacking mechanism, the pressure sensor detects the pressure value applied to the jacking mechanism by the formed product in the working process and feeds the pressure value back to the controller. An operator takes away a formed product after demoulding, the pressure value detected by the pressure sensor is reduced, the controller controls the driving mechanism to reset, and the jacking mechanism is reduced and reset along with the reset of the driving mechanism, so that the demoulding device realizes automatic reset after demoulding.

Description

Demolding device and mold

Technical Field

The utility model relates to a mould production technical field especially relates to a shedder and mould.

Background

In short, the mold is a tool for manufacturing a molded article, and the mold is composed of various parts, different molds are composed of different parts, and the household appliance product needs to use the mold during production.

After a product is formed in the mold, the formed product needs to be taken out of the mold through a demolding device, a common demolding mechanism is that after an upper mold plate and a lower mold plate are separated, an electric push rod is used for driving an ejector pin to stretch into the lower mold plate, the formed product is ejected out of the lower mold plate so as to complete demolding, in order to take the formed product away, after the formed product is taken away, manual operation is carried out again so that the electric push rod and the ejector pin reset, and ejection for the next time is carried out. Therefore, the automation degree of the existing demoulding device is relatively low, and the production efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a first technical problem who solves provides a shedder, and it can be utilized to realize the automatic re-setting after the demoulding to promote the degree of automation of mould.

The utility model provides a second technical problem provide a mould, it can be utilized to realize the stripping means automatic re-setting after the deciduate to promote degree of automation.

The first technical problem is solved by the following technical scheme:

a demolding device, comprising:

the jacking mechanism is used for jacking a formed product along the vertical direction to be demoulded;

the driving mechanism is used for driving the jacking mechanism to do ascending motion along the vertical direction;

the pressure sensor is arranged on the jacking mechanism and used for detecting the pressure value applied to the jacking mechanism by the molded product; and

and the controller is electrically connected with the driving mechanism and the pressure sensor respectively.

Shedder compare with the background art, beneficial effect who has does:

when the demoulding device is provided with the pressure sensor on the jacking mechanism, the pressure sensor detects the pressure value applied to the jacking mechanism by the formed product in the working process and feeds the pressure value back to the controller. An operator takes away a formed product after demolding, the pressure value detected by the pressure sensor is reduced, the controller controls the driving mechanism to reset, the jacking mechanism is reduced and reset along with the reset of the driving mechanism, and therefore the demolding device achieves automatic reset after demolding.

It is visible, the utility model provides a shedder, it is as a hardware architecture, can be utilized to realize the automatic re-setting after the demoulding, and during its application used the mould, can promote the degree of automation of mould.

In one embodiment, the jacking mechanism comprises:

the pressure sensor is mounted on the jacking frame, and the driving mechanism is used for driving the jacking frame to vertically move upwards;

the jacking blocks are arranged above the pressure sensor at intervals and used for jacking a formed product to be demoulded;

the first elastic piece is connected between the jacking block and the pressure sensor and applies elastic force to the jacking block to enable the jacking block to be far away from the pressure sensor.

In one embodiment, a limiting cavity is arranged in the jacking frame, the pressure sensor is arranged at the bottom of the limiting cavity, and the lower end of the jacking block can be slidably and limitedly arranged in the limiting cavity along the vertical direction.

In one embodiment, the jacking mechanism further comprises a pressure joint block, the pressure joint block is arranged above the pressure sensor in a pressing mode, and the lower end of the first elastic piece abuts against the upper surface of the pressure joint block.

In one embodiment, the jacking frame comprises a supporting seat and a plurality of connecting rods, the top end of each connecting rod is provided with the limiting cavity, the lower ends of the connecting rods are connected with the supporting seat, and the pressure sensors are arranged at the upper ends of the connecting rods;

the driving mechanism is used for driving the supporting seat to do vertical ascending motion.

In one embodiment, the driving mechanism comprises a power source and a sliding block, the lower end of the jacking mechanism is supported on the sliding block in a sliding mode, and the power source is used for driving the sliding block to slide along the horizontal direction, so that the jacking mechanism moves in the vertical direction;

the controller is electrically connected with the power source.

In one embodiment, a slide way is arranged on the slide block, and the lower end of the jacking mechanism is supported on the slide way in a sliding manner;

the slide is including the slope slide portion that from top to bottom inclines, the equal horizontal extension in upper and lower both ends of slope slide portion has berth slide portion.

In one embodiment, the slide block is provided with a limiting groove with an upper opening, and the bottom of the limiting groove forms the slide way.

The second technical problem is solved by the following technical solutions:

a mould comprises a lower template and the demoulding device;

the die cavity is formed in the upper surface of the lower template, a plurality of through holes are formed in the bottom of the die cavity in a penetrating mode, the jacking blocks correspond to the through holes in a one-to-one mode, the jacking blocks penetrate through the through holes in a sliding mode, the jacking blocks can stretch out of the bottom of the die cavity in a lifting mode to form products, and the jacking blocks are limited to penetrate out of the through holes downwards.

Compared with the prior art, the mould has the advantages that:

mould adopt the demoulding device, specifically be in climbing mechanism is last to set up pressure sensor, pressure sensor detects the shaping product in the course of the work and applies in climbing mechanism's pressure value to feed back to the controller. An operator takes away a formed product after demoulding, the pressure value detected by the pressure sensor is reduced, the controller controls the driving mechanism to reset, and the jacking mechanism is reduced and reset along with the reset of the driving mechanism, so that the automatic reset of the demoulding device after demoulding is realized.

It is visible, the utility model provides a mould, it is as a hardware framework, can be utilized to realize the demoulding device automatic re-setting after the deciduate, promotes degree of automation.

In one of them embodiment, the through-hole is established to big-end-up's step hole, the upper end of jacking piece is equipped with the upper flange along radial evagination, upper flange limit install in the big hole portion in step hole, and when the upper flange with when the step face butt in step hole, the upper surface of jacking piece with the tank bottom parallel and level of die cavity in one of them embodiment, still include the second elastic component, the second elastic component is located the lower bolster with between the climbing mechanism for to climbing mechanism exerts vertical decurrent elasticity.

Drawings

FIG. 1 is a schematic structural diagram of a demolding device provided in an embodiment of the present application;

FIG. 2 is an enlarged schematic view of circle A of FIG. 1;

FIG. 3 is a schematic view of the jacking block

FIG. 4 is a schematic structural diagram of a mold provided in the second embodiment of the present application;

fig. 5 is a perspective view of a mold provided in example two of the present application.

The figures are labeled as follows:

1-a jacking mechanism; 10-a jacking frame; 11-jacking blocks; 12-a first elastic member; 100-a limiting cavity; 13-a crimping block; 101-a support base; 102-a connecting rod; 111-an upper flange;

2-a drive mechanism; 21-a power source; 22-a slide block; 221-inclined ramp section; 222-a parking ramp section; 223-a limiting groove; 224-a rib;

3-a pressure sensor;

4-a lower template; 41-a die cavity; 42-a through hole; .

5-supporting the base;

6-a guide post;

7-a second elastic element.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

The first embodiment is as follows:

the present embodiment provides a demolding device, as shown in fig. 1-2, which includes a jacking mechanism 1, a driving mechanism 2, a pressure sensor 3, and a controller (not shown).

The jacking mechanism 1 is used for jacking a formed product along the vertical direction to be demoulded.

The driving mechanism 2 is used for driving the jacking mechanism 1 to do ascending motion along the vertical direction.

The pressure sensor 3 is connected to the jacking mechanism 1 and used for detecting the pressure value applied to the jacking mechanism 1 by the formed product.

The controller is electrically connected with the driving mechanism 2 and the pressure sensor 3 respectively. The controller is configured to control the driving mechanism 2 to reset when the pressure value is reduced due to the molded product leaving the jacking mechanism 1, and the jacking mechanism 1 is lowered and reset along with the reset of the driving mechanism 2.

It can be understood, actuating mechanism 2 moves and drives 1 whole lift of climbing mechanism and jack-up shaping product, pressure sensor 3 can acquire the pressure that the shaping product was applied to climbing mechanism 1, the shaping product breaks away from the pressure decline that 1 of climbing mechanism receives after the shaping product breaks away from completely, 2 motion of controller control actuating mechanism reset, 1 whole of climbing mechanism resets along with actuating mechanism 2 and descends and resets, thereby realize the shaping product drawing of patterns and be taken out the back, 1 self return of climbing mechanism, it resets to need not manual operation, avoid personnel extravagant, and the degree of automation is high.

The jacking mechanism 1 comprises a jacking frame 10, a jacking block 11 and a first elastic piece 12.

The pressure sensor 3 is installed on the jacking frame 10, and the driving mechanism 2 is used for driving the jacking frame 10 to do vertical ascending movement.

Jacking blocks 11 are arranged above the pressure sensor 3 at intervals, and the jacking blocks 11 are used for jacking a formed product to be demoulded.

The first elastic member 12 is connected between the jacking block 11 and the pressure sensor 3, and the first elastic member 12 applies an elastic force to the jacking block 11 to make it away from the pressure sensor 3. In this embodiment, the first elastic member 12 is a compression spring, which always has a certain elastic potential to make the jacking block 11 have a tendency to move upwards.

The top of jacking frame 10 in this embodiment is equipped with spacing chamber 100, and pressure sensor 3 locates the bottom in spacing chamber 100, and the lower extreme of jacking piece 11 is spacing to be installed in spacing chamber 100 along vertical direction ground that slides. It can be understood that the jacking block 11 is limited by the limiting cavity 100, and the lower end of the jacking block 11 can slide up and down in the limiting cavity 100 and cannot be separated from the limiting cavity 100.

Optionally, the jacking mechanism 1 further comprises a pressure joint block 13, the pressure joint block 13 is arranged on the surface of the pressure sensor 3, and the lower end of the first elastic member 12 abuts against the upper surface of the pressure sensor 3.

It can be understood that the first elastic member 12 is connected between the jacking block 11 and the pressing block 13, and the first elastic member 12 applies an elastic force to the jacking block 11 to make it away from the pressing block 13.

When carrying out the mould shaping, jacking piece 11 is compressed, during the drawing of patterns, the whole upward movement of 1 of jacking mechanism, will further compress first elastic component 12 this moment, until jacking frame 10 butt jacking piece 11, later jacking frame 10 and 11 synchronous upward movements of jacking piece, pressure sensor 3 measured pressure is the maximum value this moment, after the complete drawing of patterns of product, first elastic component 12 release elasticity, pressure sensor 3 measured pressure will reduce this moment, this pressure variation reaches and predetermines the change threshold value, controller control actuating mechanism 2 drives 1 whole decline of jacking mechanism and resets.

Referring to fig. 1, the jacking frame 10 includes a supporting base 101 and a plurality of connecting rods 102, in this embodiment, four connecting rods 102 are disposed on the supporting base 101, and the four connecting rods 102 are respectively located at four vertex positions of the same rectangle.

The driving mechanism 2 is used for driving the supporting seat 101 to do vertical ascending movement.

The top end of each connecting rod 102 is provided with the limiting cavity 100, the lower end of each connecting rod 102 is connected with the supporting seat 101, and the pressure sensor 3 is installed at the upper end of each connecting rod 102.

It can be understood that when the driving mechanism 2 drives the supporting seat 101 to make vertical ascending movement, the connecting rod 102 moves upwards synchronously.

The driving mechanism 2 comprises a power source 21 and a slide block 22, the lower end of the jacking mechanism 1 is slidably supported on the slide block 22, and the power source 21 is used for driving the slide block 22 to slide along the horizontal direction, so that the jacking mechanism 1 moves in the vertical direction. In the present embodiment, the power source 21 is a cylinder motor.

The controller is electrically connected with the power source 21, and then controls the power source 21 to drive the jacking mechanism 1 to move.

The slide block 22 is provided with a slide way, and the lower end of the jacking mechanism 1 is supported on the slide way in a sliding way. In this embodiment, the bottom of the supporting seat 101 of the jacking mechanism 1 is provided with a roller, and the roller is arranged on the slideway in a rolling manner.

As shown in fig. 3, the chute includes an inclined chute portion 221 inclined from top to bottom, and both upper and lower ends of the inclined chute portion 221 are provided with horizontally extending stopping chute portions 222. When the roller is located at the lower parking slide portion 222, the roller can be kept at the position, and after moving along the slider 22, the roller is guided by the inclined slide portion 221 to move upward and finally stays at the upper parking slide portion 222.

It can be understood that the moving direction of the slide 22 coincides with the line on which the projection of the inclined slide portion 221 on the horizontal plane is located.

In this embodiment, the inclined ramp portion 221 is inclined at an angle of 45 ° relative to horizontal, optionally at any angle between 20 ° and 60 °.

Furthermore, the slider 22 is provided with a limiting groove 223 with an upper opening, and the bottom of the limiting groove 223 forms the slide way. In this embodiment, the limiting groove 223 is in clearance fit with the roller, so that the roller is limited to move in the limiting groove 223.

The second embodiment:

the present embodiment provides a mold, as shown in fig. 4-5, the mold includes a lower mold plate 4 and a demolding device, wherein the demolding device refers to the first embodiment.

The bottom of the upper surface that lower bolster 4 was equipped with chase 41, chase 41 runs through and has a plurality of through-hole 42, and jacking piece 11 and through-hole 42 one-to-one set up, and through-hole 42 is worn to locate by the 11 slides of jacking piece, and jacking piece 11 can upwards stretch out the tank bottom of chase 41 with jacking shaping product, and jacking piece 11 is restricted and is worn out through-hole 42 downwards to receive the guide effect of through-hole 42 all the time.

It should be noted that the upper surface of the lower template 4 and the bottom of the cavity 41 are arranged in a staggered manner along the height direction, and the demolding device further comprises an upper template (not shown) for pressing and contacting the lower template 4, and the cavity 41 is used for introducing and molding the melt for product production. It will be appreciated that the product design shape is adapted to the shape of the die cavity 41. In this embodiment, the mold cavity 41 is a rectangular groove, and four through holes 42 are provided, and are respectively located in four vertex areas of the rectangular groove.

Further, the through hole 42 is provided with a stepped hole with a large top and a small bottom, as shown in fig. 2, the upper end of the jacking block 11 is provided with an upper flange 111 protruding outwards in the radial direction, the upper flange 111 is installed in the large hole portion of the stepped hole in a limiting manner, and when the upper flange 111 abuts against the stepped surface of the stepped hole, the upper surface of the jacking block 11 is flush with the bottom of the die cavity 41.

The bottom of the lower template 4 is also provided with a supporting base 5. The supporting base 5 is used for supporting the lower template 4, a sealing cavity is formed between the supporting base 5 and the lower template 4, the jacking mechanism 1 is located in the sealing cavity, and the driving mechanism 2 is arranged on the supporting base 5.

The upper surface of the lower die plate 4 is provided with a plurality of guide posts 6 extending upward outside the die cavity 41. In this embodiment, four vertex positions of the upper surface of the lower template 4 are respectively provided with a guide column 6. Correspondingly, the upper die plate is provided with guide holes corresponding to the guide columns 6 one by one, so that the upper die plate is guided when moving downwards and keeps moving linearly.

The slider 22 is provided at a side thereof with one of a rib 224 or a guide groove, and the support base 5 is provided with the other of the rib or the guide groove, the guide groove extending in the horizontal direction, and the rib 224 is slidably provided in the guide groove. As shown in fig. 3, the slider 22 is provided with a rib 224 and the support base 5 is provided with a guide groove.

It should be noted that, in this embodiment, the protruding ribs 224 are disposed on two sides of the slider 22 at the same height, so that the slider 22 is stressed more uniformly when sliding.

In order to make this shedder not be restricted to and use on the horizontal plane, this shedder's operating condition can personally submit certain contained angle with the horizontal plane promptly, or shedder need overturn certain angle, still can guarantee that climbing mechanism 1 resets. The ejector in this embodiment further includes a second elastic member 7, and the second elastic member 7 is used for applying downward elastic force to the jacking mechanism 1. Here, the downward elastic force means downward in the state shown in fig. 5.

When the slide block 22 moves in the horizontal direction, the jacking mechanism 1 overcomes the gradually increased elastic potential energy of the second elastic piece 7 and stops at the upper stopping slide way portion 222 after passing through the inclined slide way portion 221 from the lower stopping slide way portion 222. When the slide block 22 returns to the original position, the elastic potential energy of the jacking mechanism 1 is released, and the jacking mechanism is driven to move downwards in an accelerated manner. Through addding elasticity for this shedder is not restricted to and uses on the horizontal plane, even this shedder overturns certain angle, for example 90, relies on the release of elasticity potential energy, still can guarantee climbing mechanism 1 and reset.

In this embodiment, the second elastic member 7 is connected between the support base 101 and the lower template 4, and the second elastic member 7 is set as a compression spring and is always in a compressed state, and has elastic potential energy, and the shorter the length of the second elastic member 7 is, the larger the elastic potential energy is. Therefore, when the jacking mechanism 1 moves upwards, the gradually increased elastic potential energy of the second elastic part 7 is overcome.

In this embodiment, the second elastic members 7 are sleeved on the connecting rods 102 in a one-to-one correspondence manner, and the second elastic members 7 are always guided by the connecting rods 102 when elastically stretching.

The working principle of the die provided by the embodiment is as follows:

first, an upper mold plate (not shown) adapted to the lower mold plate 4 is attached to the lower mold plate 4, a melt for product production is introduced into the cavity 41 through a feeding port pre-opened at the top of the upper mold plate, and the mold is left standing as a whole, so that the melt passes through the cavity 41 and is then manufactured into a molded product.

Afterwards, through opening cope match-plate pattern and lower bolster 4 looks mutual separation, start power supply 21 and drive slider 22 and move right, and then drive supporting seat 101 and rise, and then jacking piece 11 upwards lifts and wears to establish the through-hole 42 of lower bolster 4, jacking piece 11 contact shaping product to make mutual separation between shaping product and the die cavity 41, this process makes first elastic component 12 and second elastic component 7 compressed simultaneously, pressure sensor 3 detects pressure and transmits pressure data to the controller.

After the product is taken out, the pressure of the product to the jacking block 11 disappears, the first spring 12 is released outwards, the pressure detected by the pressure sensor 3 is reduced, the controller starts the power source 21 again to reset, the sliding block 22 resets leftwards, the supporting seat 101 is lowered under the action of the second spring 7 and the action of self gravity, and the jacking block 11 is retracted into the through hole 42.

Compared with the background art, the demolding device provided by the embodiment has the following beneficial effects: pressure sensor 3 can acquire the pressure value that the shaping product was applied to climbing mechanism 1, and the shaping product breaks away from the back pressure value completely and descends, and controller control actuating mechanism 2 drives 1 decline of climbing mechanism and resets when the pressure value descends to 1 self return of climbing mechanism need not manual operation and resets after realizing the drawing of patterns, avoids personnel extravagant.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (11)

1. A demolding device, characterized by comprising:

the jacking mechanism (1) is used for jacking a formed product along the vertical direction to be demoulded;

the driving mechanism (2) is used for driving the jacking mechanism (1) to do ascending motion along the vertical direction;

the pressure sensor (3) is arranged on the jacking mechanism (1) and is used for detecting the pressure value applied to the jacking mechanism (1) by the molded product; and

and the controller is electrically connected with the driving mechanism (2) and the pressure sensor (3) respectively.

2. The demolding device according to claim 1, wherein the jacking mechanism (1) comprises:

the pressure sensor (3) is mounted on the jacking frame (10), and the driving mechanism (2) is used for driving the jacking frame (10) to vertically move upwards;

the jacking blocks (11) are arranged above the pressure sensor (3) at intervals, and the jacking blocks (11) are used for jacking a formed product to be demoulded;

the first elastic piece (12) is connected between the jacking block (11) and the pressure sensor (3), and the first elastic piece (12) exerts the elastic force which enables the jacking block (11) to be far away from the pressure sensor (3).

3. The demolding device as claimed in claim 2, wherein a limiting cavity (100) is arranged in the jacking frame (10), the pressure sensor (3) is arranged at the bottom of the limiting cavity (100), and the lower end of the jacking block (11) is vertically slidably and limitedly mounted in the limiting cavity (100).

4. A demoulding device according to claim 3, wherein the jacking mechanism (1) further comprises a press-fit block (13), the press-fit block (13) is arranged above the pressure sensor (3), and the lower end of the first elastic member (12) abuts against the upper surface of the press-fit block (13).

5. The demolding device according to claim 3, wherein the jacking frame (10) comprises a supporting seat (101) and a plurality of connecting rods (102), the top end of each connecting rod (102) is provided with the limiting cavity (100), the lower ends of the connecting rods (102) are connected with the supporting seat (101), and the pressure sensors (3) are mounted at the upper ends of the connecting rods (102);

the driving mechanism (2) is used for driving the supporting seat (101) to do vertical ascending motion.

6. The stripping device as claimed in any one of claims 1-5, characterized in that the driving mechanism (2) comprises a power source (21) and a slide (22), the lower end of the jacking mechanism (1) is slidably supported on the slide (22), the power source (21) is used for driving the slide (22) to slide along the horizontal direction, so that the jacking mechanism (1) moves in the vertical direction;

the controller is electrically connected to the power source (21).

7. The demolding device according to claim 6, wherein a slide is arranged on the slide block (22), and the lower end of the jacking mechanism (1) is supported on the slide in a sliding manner;

the slide is including slope slide portion (221) from top to bottom slope, the equal level in upper and lower both ends of slope slide portion (221) extends there is berth slide portion (222).

8. The demolding device according to claim 7, wherein the slide block (22) is provided with a limiting groove (223) with an upper opening, and the bottom of the limiting groove (223) forms the slide way.

9. A mould, characterized by comprising a lower template (4) and a stripping device according to any one of claims 2 to 5;

wherein, chase (41) have been seted up to the upper surface of lower bolster (4), a plurality of through-hole (42) have been run through to the tank bottom of chase (41), jacking piece (11) with through-hole (42) one-to-one, jacking piece (11) slide and wear to locate through-hole (42), jacking piece (11) can upwards stretch out the tank bottom of chase (41) is with the jacking shaping product, jacking piece (11) are restricted and are worn out downwards through-hole (42).

10. The mold according to claim 9, wherein the through hole (42) is a stepped hole with a large top and a small bottom, the upper end of the jacking block (11) is provided with an upper flange (111) protruding radially outwards, the upper flange (111) is limit-mounted in the large hole portion of the stepped hole, and when the upper flange (111) abuts against the stepped surface of the stepped hole, the upper surface of the jacking block (11) is flush with the bottom of the mold cavity (41).

11. The mold according to claim 9, further comprising a second elastic member (7), wherein the second elastic member (7) is disposed between the lower mold plate (4) and the jacking mechanism (1) for applying a vertically downward elastic force to the jacking mechanism (1).

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