Lower die and die structure

Abstract

The invention discloses a lower die and a die structure. The lower die comprises two lower sliding seats which are oppositely arranged, the two lower sliding seats can slide relatively, and a supporting assembly is arranged between the two lower sliding seats; the supporting assembly is supported between the two lower sliding seats when the two lower sliding seats relatively slide to a certain distance; the supporting assembly is supported between the two lower sliding seats, especially between the middles of the two lower sliding seats when a product is stressed and formed, so that the middles of the lower sliding seats cannot generate elastic deformation and cannot sink inwards, and the lower sliding seats and the two ends of the lower sliding seats are always kept on the same straight line surface; and a machined and formed product can be prevented from being in a radian bending state, so that the quality of the product can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of molds, and specifically relates to a lower mold and a mold structure. Background Art

[0002] The slide seat type sheet metal mold includes a U-bending forming mold and a side-pushing forming mold; specifically, the slide seat type sheet metal mold includes a lower mold base and two lower slide seats oppositely arranged on both sides of the lower slide seat. When the mold is closed, the two lower slide seats slide away from each other on the lower mold base to a set position and then start to process and form the product. Since there are supports at both ends in the length direction of the lower slide seat and there is no support in the middle due to the blockage of the product, the middle part of the lower slide seat is prone to elastic deformation when the product is force-formed, resulting in an inward depression, causing the edges of the product formed by U-bending or the edges of the product pushed out laterally to be inconsistent due to the elastic deformation of the lower slide seat, resulting in a depression in the middle of the processed and formed product, presenting a curved state, which has always been a bottleneck problem in the industry.

[0003] In view of this, the present invention is specifically proposed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a lower mold and a mold structure. When the product is force-formed, the support component supports between the two lower slide seats, especially between the middle parts of the two lower slide seats, so that the middle part of the lower slide seat will not produce elastic deformation and will not have an inward depression, and always remains in a straight line with the two ends of the lower slide seat, achieving the purpose of preventing the processed and formed product from presenting a curved state, thereby improving the quality of the product.

[0005] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] The present invention provides a lower mold, including two lower slide seats arranged oppositely, and the two lower slide seats can slide relative to each other.

[0007] A support component is arranged between the two lower slide seats.

[0008] When the two lower slide seats slide relative to each other to a certain distance, the support component supports between the two lower slide seats.

[0009] Furthermore,

[0010] Support arms are respectively arranged on the opposite sides of the two lower slide seats.

[0011] The support component slides reciprocally between the two lower slide seats. When the two lower slide seats slide relative to each other to a certain distance, it inserts into the space between the two support arms and supports between the two support arms.

[0012] Preferably, the sliding direction of the lower sliding seat is perpendicular to the sliding direction of the support assembly in the horizontal direction.

[0013] Furthermore,

[0014] The support assembly further includes: a support portion and a driving portion;

[0015] The support portion is inserted into the space between the two support arms under the drive of the driving portion and is supported between the two support arms.

[0016] Furthermore,

[0017] On the lower die, there is provided:

[0018] A connecting portion, located between the two lower sliding seats, is arranged on the opposite side of the side where the two support arms are inserted by the support portion, and is spaced from the first end of the support portion;

[0019] The driving portion includes:

[0020] A driving member, arranged at the second end of the support portion, drives the support portion to slide towards the space between the two support arms;

[0021] An elastic reset member, one end is connected to the first end of the support portion, and the other end is connected to the connecting portion, driving the support portion to reset;

[0022] Preferably, the support arms are arranged in the middle of the lower sliding seat.

[0023] Furthermore, the driving member (321) is a first inclined surface (321a) provided on the end surface of the second end of the support portion (31).

[0024] Furthermore,

[0025] On the lower die, there is provided:

[0026] A first limiting portion, arranged at a distance from the end surface of the second end of the support portion along the sliding direction of the support portion.

[0027] Furthermore,

[0028] On the lower die, there is provided:

[0029] Two second limiting portions, arranged on the opposite sides of the distance between the end surface of the second end of the support portion and the first limiting portion;

[0030] The second end of the support portion is located between the two second limiting portions.

[0031] Furthermore,

[0032] The connecting portion is arranged at a distance from the end surface of the first end of the support portion along the sliding direction of the support portion;

[0033] The elastic reset member is a nitrogen spring, one end of which is connected to the first end of the support portion, and the other end passes through the space between the two support arms and is connected to the connection portion.

[0034] Furthermore,

[0035] A guiding portion is provided on the lower die;

[0036] The guiding portion is a guiding block extending along the sliding direction of the support portion, and the guiding block is inserted into a slot provided on the support portion; and / or,

[0037] The guiding portion is a guiding rail provided between the two lower sliding seats and extending along the sliding direction of the support portion, and the support portion slides within the guiding rail.

[0038] The present invention also provides a mold structure, which includes an upper die, and further includes the lower die provided by the above technical solution disposed below the upper die.

[0039] Furthermore,

[0040] An inserting tool is provided on the upper die, and the inserting tool is inserted vertically into the space between the first limiting portion and the end face of the second end of the support portion;

[0041] The first inclined surface is arranged on the inserting path of the inserting tool;

[0042] During the inserting process, the inserting tool is in transmission cooperation with the first inclined surface for driving the support portion to slide towards the space between the two support arms;

[0043] Preferably, a second inclined surface in transmission cooperation with the first inclined surface is provided at the lower end of the inserting tool;

[0044] Further preferably, the first inclined surface and the second inclined surface are gradually inclined towards the first limiting portion from top to bottom.

[0045] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0046] By the support assembly supporting between the two lower sliding seats when the product is stressed and formed, especially supporting between the middle parts of the two lower sliding seats, elastic deformation will not occur in the middle part of the lower sliding seat, and the situation of inward depression will not occur, and it always remains in a straight line surface with the two ends of the lower sliding seat, which can prevent the processed and formed product from presenting a curved state, thereby improving the quality of the product.

[0047] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0048] The accompanying drawings, as part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not unduly limit the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the accompanying drawings:

[0049] Figure 1 is a schematic structural diagram of a mold structure provided by an embodiment of the present invention;

[0050] Figure 2 is an exploded schematic diagram of a mold structure provided by an embodiment of the present invention;

[0051] Figure 3 is a schematic structural diagram of another mold structure provided by an embodiment of the present invention;

[0052] Figure 4 is an exploded schematic diagram of another mold structure provided by an embodiment of the present invention.

[0053] Reference numerals: 1 - lower die base; 2 - lower sliding seat; 21 - support arm; 22 - first spacing; 23 - notch; 24 - sliding block; 241 - third inclined surface; 3 - support assembly; 31 - support portion; 311 - slot; 32 - driving portion; 321 - driving member; 321a - first inclined surface; 322 - elastic reset member; 322a - nitrogen spring; 4 - first limiting portion; 41 - second spacing; 5 - second limiting portion; 6 - connecting portion; 7 - guiding portion; 71 - guiding block; 72 - guiding slide rail; 8 - inserting knife; 81 - second inclined surface; 9 - sliding seat inserting knife; 91 - fourth inclined surface; 10 - lower template; 11 - folded U-shaped sliding seat; 12 - side folding knife; 13 - side folding sliding seat; 14 - side pushing plate.

[0054] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0056] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0057] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] As Figures 1-4 shown, the present invention provides a lower mold, which includes two lower sliding seats 2 arranged oppositely, and the two lower sliding seats 2 can slide relative to each other.

[0059] A support assembly 3 is provided between the two lower sliding seats 2;

[0060] The support assembly 3 supports between the two lower sliding seats 2 when the two lower sliding seats 2 slide relative to each other to a certain distance.

[0061] In the embodiment of the present invention, when the product is formed under force, the support assembly 3 supports between the two lower sliding seats 2, especially between the middle parts of the two lower sliding seats 2, so that the middle part of the lower sliding seat 2 will not produce elastic deformation and will not sink inward, and always remains on a straight line surface with the two ends of the lower sliding seat 2, which can prevent the product after processing and forming from showing a curved state, thereby improving the quality of the product.

[0062] The mold structure includes an upper mold and a lower mold arranged below the lower mold. The lower mold includes a lower mold base 1. The lower mold base 1 is square. The two lower sliding seats 2 are arranged oppositely on both sides of the lower mold base 1. When the upper mold and the lower mold are opened, the two lower sliding seats 2 are respectively in the first position, and the distance between the two lower sliding seats 2 is the third distance. When the upper mold and the lower mold are closed, the two lower sliding seats 2 slide away from each other in their respective first positions to be respectively in the second position, and the distance between the two lower sliding seats 2 is the fourth distance. The third distance is less than the fourth distance; a return spring is connected to the lower sliding seat 2, and the return spring provides a return force for the two lower sliding seats 2 to slide towards each other from the second position to the first position.

[0063] The so-called certain distance means that when the two lower sliding seats 2 slide away from each other to be respectively in the second position, it is the fourth distance between the two lower sliding seats 2. Figure 1 、Figure 2 , Figure 3 and Figure 4 show a schematic diagram of the die structure when the two lower slide seats 2 are in the second position;

[0064] The lower slide seat 2 has a certain extension length and is square, as Figure 1 and Figure 3 shown. The length direction of the lower slide seat 2 is the left - right direction. Slide blocks 24 are respectively provided at the left and right ends of the lower slide seat 2. The two lower slide seats 2 are distributed in the front - rear direction and slide back and forth on the lower die base 1. When the product is being formed and under force, the front side of the front lower slide seat 2 receives a backward thrust, and the rear side of the rear lower slide seat 2 receives a forward thrust. Since slide blocks 24 are respectively provided at the left and right ends of the two lower slide seats 2, the slide blocks 24 at the left and right ends can support the left and right ends of the lower slide seat 2 when the lower slide seat 2 is under thrust, which will cause the middle part of the two lower slide seats 2 in the length direction to be prone to deformation, resulting in the middle part of the front lower slide seat 2 sinking backward and the middle part of the rear lower slide seat 2 sinking forward; A lower template 10 is assembled on each lower slide seat 2, and the product to be formed is placed on the lower slide seat 2 and the lower template 10.

[0065] The upper die includes an upper die base, a side folding knife 12 provided on the upper die base, and an upper slide seat. The side folding knife 12 and the upper slide seat move up and down with the upper die base and cooperate to process and fold the U - shape of the product to be formed when the upper die and the lower die are closed;

[0066] The die structure of the present application is a slide - type sheet metal die, which involves a U - folding forming die and a side - pushing forming die. Figure 1 and Figure 2 What is shown is the U - folding forming die. Replacing the U - folding slide seat 11 in Figure 1 with a side - folding slide seat 13 and replacing the side folding knife 12 with a side - pushing plate 14 results in a side - pushing forming die. As Figure 3 and Figure 4 shown, the side - folding slide seat 13 and the side - pushing plate 14 cooperate to process and side - push the product to be formed when the upper die and the lower die are closed.

[0067] The two lower slide seats 2 have a certain height, and an accommodation space is formed between the two lower slide seats 2. The support assembly 3 is located in the accommodation space, which can reduce the space occupied by the die structure and enable the support assembly 3 to make full use of the space between the two lower slide seats 2.

[0068] As Figures 1-4 shown, in the embodiment of the present invention, support arms 21 are respectively provided on the opposite sides of the two lower slide seats 2;

[0069] The support assembly 3 slides back and forth between the two lower slide seats 2. When the two lower slide seats 2 slide relative to each other to a certain distance, it inserts into the distance between the two support arms 21 and supports between the two support arms 21.

[0070] In an embodiment of the present invention, the distance between the two support arms 21 is the first distance 22. The two opposite side surfaces of the two lower sliding seats 2 are convexly provided with support arms 21. Specifically, the support arms 21 are perpendicular to the lower sliding seats 2, and the support arms 21 are square. The two opposite side surfaces of the two lower sliding seats 2 refer to the two opposite side surfaces of the two lower sliding seats 2 located in the accommodation space and facing each other. One end of the support arm 21 is connected to the lower sliding seat 2, and the other end is a free end. The end faces of the free ends of the two support arms 21 are arranged facing each other. For example, in Figure 1 and Figure 3 , the two opposite side surfaces of the two lower sliding seats 2 are the rear side surface of the front lower sliding seat 2 and the front side surface of the rear lower sliding seat 2, and the two support arms 21 extend horizontally forward and backward;

[0071] When the support assembly 3 reciprocates, it can realize that the support assembly 3 is inserted into the distance between the two support arms 21 or the support assembly 3 disengages from the distance between the two support arms 21.

[0072] As a preferred embodiment, the sliding direction of the lower sliding seat 2 and the sliding direction of the support assembly 3 are perpendicular to each other in the horizontal direction, so that the lower sliding seat 2 and the support assembly 3 slide on a horizontal plane, enabling the support assembly 3 to always slide between the two lower sliding seats 2 and making full use of the space between the two lower sliding seats 2.

[0073] For example, as in Figure 1 and Figure 3 described, the two lower sliding seats 2 slide horizontally in the front-rear direction, and the support assembly 3 slides horizontally in the left-right direction.

[0074] Furthermore, the support assembly 3 further includes: a support portion 31 and a driving portion 32;

[0075] The support portion 31 is inserted into the distance between the two support arms 21 under the drive of the driving portion 32 and supports between the two support arms 21.

[0076] This application can realize the support for the two lower sliding seats 2 by using one support portion 31, which can simplify the structure of the support assembly 3 and reduce the occupation of the space between the two lower sliding seats 2.

[0077] The support portion 31 is square and has a certain extension length, which is consistent with the extension length direction of the lower sliding seat 2. For example, in Figure 1 and Figure 3 , the support portion 31 has a certain extension length in the left-right direction; the front side surface of the support portion 31 supports the rear side surface of the front lower sliding seat 2, and the rear side surface of the support portion 31 supports the front side surface of the rear lower sliding seat 2.

[0078] The driving part 32 described above can be the cylinder rod of a cylinder, and the cylinder rod drives the supporting part 31 to slide back and forth. The driving part 32 can also be:

[0079] The driving part 32 includes:

[0080] A driving member 321, which is arranged at the second end of the supporting part 31 and drives the supporting part 31 to slide towards the spacing between the two support arms 21;

[0081] An elastic reset member 322, one end of which is connected to the first end of the supporting part 31, and the other end is connected to the connecting part 6, driving the supporting part 31 to reset.

[0082] On the upper die, there is provided:

[0083] A connecting part 6, which is located between the two lower sliding seats 2, is arranged on the opposite side of the two support arms 21 on the side where the supporting part 31 is inserted, and is arranged at an interval from the first end of the supporting part 31.

[0084] The driving part 32 of the present application is composed of two parts. Among them, the elastic reset member 322 is used to drive the supporting part 31 to reset, which can avoid the electronic components for driving the supporting part 31 to reset, reduce the cost of the mold, and also reduce the weight of the mold; the elastic reset member 322 generates elastic deformation between the connecting part 6 and the first end of the supporting part 31.

[0085] The support arms 21 are arranged in the middle of the lower sliding seat 2, which can realize the support of the middle part of the lower sliding seat 2 by the supporting part 31, so that the middle part of the lower sliding seat 2 will not generate elastic deformation; as Figure 1 and Figure 3 shown, the extending direction of the length of the lower sliding seat 2 is the left - right direction, and the support arms 21 are arranged in the middle of the lower sliding seat 2 in the left - right direction.

[0086] As Figure 2 and Figure 4 shown, specifically, the driving member 321 is a first inclined surface 321a provided on the end surface of the second end of the supporting part 31.

[0087] In the embodiment of the present invention, the lower die further includes:

[0088] A first limiting part 4, which is arranged at an interval from the end surface of the second end of the supporting part 31 along the sliding direction of the supporting part 31, forming a second spacing 41;

[0089] An inserting knife 8 is provided on the upper die, and the inserting knife 8 is inserted vertically into the spacing between the first limiting part 4 and the end surface of the second end of the supporting part 31; the first inclined surface 321a is arranged on the inserting path of the inserting knife 8;

[0090] During the inserting process, the inserting knife 8 is in transmission cooperation with the first inclined surface 321a, and is used to drive the supporting part 31 to slide towards the spacing between the two support arms 21.

[0091] In an embodiment of the present invention, a second inclined surface 81 is provided at the lower end of the plug cutter 8 and is in driving cooperation with the first inclined surface 321a.

[0092] When the upper die moves downward to close the mold with the lower die, the upper die drives the plug cutter 8 to move vertically downward. The plug cutter 8 is inserted into the second spacing 41 between the first limiting portion 4 and the second end face of the supporting portion 31. Since the first inclined surface 321a is arranged on the insertion path of the plug cutter 8, during the insertion process, the second inclined surface 81 of the plug cutter 8 will be in driving cooperation with the first inclined surface 321a, driving the supporting portion 31 to slide linearly towards the spacing between the two supporting arms 21. Due to the action of the first limiting portion 4, it will prompt the supporting portion 31 to slide towards the spacing between the supporting arms 21.

[0093] The first inclined surface 321a and the second inclined surface 81 are gradually inclined towards the first limiting portion 4 from top to bottom. Such a setting enables the first inclined surface 321a and the second inclined surface 81 to drive the supporting portion 31 to slide towards the spacing between the supporting arms 21 when they are in driving cooperation. For example, as Figure 1 and Figure 3 shown, the first limiting portion 4 is arranged on the lower die base 1, protruding upward from the lower die base 1, arranged on the left side of the lower die base 1, not between the two lower sliding seats 2, and the supporting portion 31 slides towards the right side of the lower die base 1 and towards the spacing between the two supporting arms 21.

[0094] Furthermore, the lower die further includes: two second limiting portions 5, arranged on the opposite sides of the spacing between the second end face of the supporting portion 31 and the first limiting portion 4; the second end of the supporting portion 31 is located between the two second limiting portions 5.

[0095] The cooperation of the two second limiting portions 5 and the first limiting portion 4 prompts the supporting portion 31 to always slide towards the spacing between the two supporting arms 21. The cooperation of the two second limiting portions 5 and the first limiting portion 4 forms a limiting area. The two second limiting portions 5 are arranged on the lower die base 1 and protrude upward from the lower die base 1. For example, Figure 1 and Figure 3 shown, the two second limiting portions 5 are arranged on the front and rear sides of the spacing between the second end face of the supporting portion 31 and the first limiting portion 4;

[0096] The second end of the supporting portion 31 is located between the two second limiting portions 5, and the second end of the supporting portion 31 is located within the limiting area, which can ensure that the second inclined surface 81 of the plug cutter 8 can be in driving cooperation with the first inclined surface 321a and can contact the first inclined surface 321a. Preferably, the second end of the supporting portion 31 is slidably connected to the two second limiting portions 5.

[0097] The upper die is also provided with a slide seat cutter 9, and the slide seat cutter 9 is linked with the cutter 8. At the left and right ends of each lower slide seat 2, there are respectively provided with notches 23, the notches 23 are arranged facing the second limiting part 5, there is a sliding block 24 arranged in the notch 23, a third inclined surface 241 is arranged on the sliding block 24, and a fourth inclined surface 91 is arranged on the slide seat cutter 9. When the upper die moves downward to close the die with the lower die, the upper die drives the slide seat cutter 9 to move downward, and the slide seat cutter 9 is inserted into the space between the second limiting part 5 and the sliding block 24. During the insertion process, the fourth inclined surface 91 of the slide seat cutter 9 will be in transmission cooperation with the third inclined surface 241 to drive the two support arms 21 of the lower slide seat 2 to slide away from each other. The function of the second limiting part 5 will cause the two support arms 21 to slide linearly away from each other;

[0098] Whether the first inclined surface 321a and the second inclined surface 81 cooperate to make the supporting part 31 slide first or the third inclined surface 241 and the fourth inclined surface 91 cooperate to make the lower slide seat 2 slide first, it is necessary to ensure that when the lower slide seat 2 is in the second position, the first end of the supporting part 31 is inserted into the space between the two support arms 21.

[0099] The cutter 8 and the sliding cutter 8 share a second limiting part 5, which can simplify the structure of the lower die.

[0100] In the embodiment of the present invention, the connecting part 6 is arranged at a distance from the first end of the supporting part 31 along the sliding direction of the supporting part 31;

[0101] The elastic resetting part 322 is a nitrogen spring 322a, one end is connected to the first end of the supporting part 31, and the other end passes through the space between the two support arms 21 and is connected to the connecting part 6.

[0102] In the embodiment of the present invention, the nitrogen spring 322a is arranged within the space between the supporting part 31 and the connecting part 6, and expands and contracts within the space between the supporting part 31 and the connecting part 6, which has a guiding effect on the deformation of the nitrogen spring 322a;

[0103] When the supporting part 31 slides towards the space between the two support arms 21, the nitrogen spring 322a is gradually compressed. When the supporting part 31 is inserted into the space between the two support arms 21 and the supporting part 31 stops sliding, the nitrogen spring 322a is compressed to the maximum extent; after the product is formed, the upper die and the lower die are opened, the cutter 8 is disengaged from the insertion, and the transmission cooperation with the first inclined surface 321a on the supporting part 31 is released. The nitrogen spring 322a is released from compression, and the elastic force of the nitrogen spring 322a drives the supporting part 31 to reset.

[0104] As Figures 1-4 shown, in the embodiment of the present invention, the lower die further includes: a guiding part 7; the guiding part 7 is a guiding block 71 extending along the sliding direction of the supporting part 31, and the guiding block 71 is inserted into a slot 311 arranged on the supporting part 31; and / or,

[0105] The guiding part 7 is a guiding slide rail 72 disposed between two lower sliding seats 2 and extending along the sliding direction of the supporting part 31, and the supporting part 31 slides within the guiding slide rail 72.

[0106] In an embodiment of the present invention, the guiding part 7 of the present application may be a guiding block 71, a guiding slide rail 72, or a combination of the guiding block 71 and the guiding slide rail 72, which can guide the sliding of the supporting part 31;

[0107] When the guiding part 7 is a guiding block 71, specifically, a plurality of slots 311 are provided on the upper part of the supporting part 31. The plurality of slots 311 are uniformly distributed along the extending length direction of the supporting part 31, and the notch of each slot 311 faces upward. The guiding block 71 is inserted into the slot 311 to guide the sliding of the supporting part 31. The guiding block 71 is arranged at a distance from the insertion slot along the sliding direction of the supporting part 31, which can facilitate the user to take and place the insertion slot; as Figure 1 shown, a plurality of insertion slots are distributed in the left - right direction;

[0108] When the guiding part 7 is a guiding slide rail 72, two rows of protruding units are provided on the top side of the lower sliding seat 2. Each row of protruding units includes a plurality of protruding parts arranged at intervals along the sliding direction of the supporting part 31. The two rows of protruding units cooperate to form the guiding slide rail 72; as Figure 1 and Figure 3 shown, the two rows of protruding units are distributed front - to - back, and the plurality of protruding parts in each row of protruding units are arranged in the left - right direction.

[0109] The above - mentioned are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the above - mentioned technical content to form equivalent embodiments of equivalent changes. The implementation schemes in the above - mentioned embodiments can also be further combined or replaced. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above - mentioned embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A lower die, comprising two lower sliding seats (2) arranged oppositely, the two lower sliding seats (2) being relatively slidable, characterized in that, a support assembly (3) is provided between the two lower sliding seats (2); the support assembly (3) supports between the two lower sliding seats (2) when the two lower sliding seats (2) slide relatively to a certain distance.

2. The lower die according to claim 1, characterized in that, support arms (21) are respectively arranged on one side of the two lower sliding seats (2) facing each other; the support assembly (3) reciprocally slides between the two lower sliding seats (2), and when the two lower sliding seats (2) slide relatively to a certain distance, it inserts into the space between the two support arms (21) and supports between the two support arms (21); Preferably, the sliding direction of the lower sliding seat (2) is perpendicular to the sliding direction of the support assembly (3) in the horizontal direction.

3. The lower die according to claim 2, characterized in that, the support assembly (3) includes: a support portion (31) and a driving portion (32); the support portion (31) is driven by the driving portion (32) to insert into the space between the two support arms (21) and supports between the two support arms (21).

4. The lower die according to claim 3, characterized in that, the following are provided on the lower die: a connecting portion (6), located between the two lower sliding seats (2), arranged on the opposite side of the side where the two support arms (21) are for the support portion (31) to insert, and spaced from the first end of the support portion (31); the driving portion (32) includes: a driving member (321), arranged at the second end of the support portion (31), driving the support portion (31) to slide towards the space between the two support arms (21); an elastic reset member (322), one end connected to the first end of the support portion (31), and the other end connected to the connecting portion (6), driving the support portion (31) to reset. Preferably, the support arm (21) is arranged in the middle of the lower sliding seat (2).

5. The lower die according to claim 4, characterized in that, the driving member (321) is a first inclined surface (321a) arranged on the end surface of the second end of the support portion (31).

6. The lower die according to claim 5, characterized in that, the following are provided on the lower die: a first limiting portion (4), arranged at a distance from the end surface of the second end of the support portion (31) along the sliding direction of the support portion (31); Preferably, the following are provided on the lower die: two second limiting portions (5), arranged on the opposite sides of the space between the end surface of the second end of the support portion (31) and the first limiting portion (4); the second end of the support portion (31) is located between the two second limiting portions (5).

7. The lower die according to claim 4, characterized in that, the connecting portion (6) is arranged at a distance from the end surface of the first end of the support portion (31) along the sliding direction of the support portion (31); the elastic reset member (322) is a nitrogen spring (1), one end connected to the first end of the support portion (31), and the other end passing through the space between the two support arms (21) and connected to the connecting portion (6).

8. The lower die according to any one of claims 1-7, characterized in that, a guiding portion (7) is provided on the lower die; The guiding portion (7) is a guiding block (71) extending along the sliding direction of the supporting portion (31), and the guiding block (71) is inserted into a slot (311) provided on the supporting portion (31); and / or, The guiding portion (7) is a guiding slide rail (72) provided between the two lower sliding seats (2) and extending along the sliding direction of the supporting portion (31), and the supporting portion (31) slides within the guiding slide rail (72).

9. A mold structure, comprising an upper mold, characterized in that, It further includes a lower mold according to any one of claims 1-8 provided below the upper mold.

10. The mold structure according to claim 9, wherein An inserting knife (8) is provided on the upper mold, and the inserting knife (8) is inserted vertically into the distance between the first limiting portion (4) and the end face of the second end of the supporting portion (31); The first inclined surface (321a) is provided on the inserting path of the inserting knife (8); The inserting knife (8) is in driving cooperation with the first inclined surface (321a) during the inserting process, and is used to drive the supporting portion (31) to slide towards the distance between the two supporting arms (21); Preferably, a second inclined surface (81) in driving cooperation with the first inclined surface (321a) is provided at the lower end of the inserting knife (8); Further preferably, the first inclined surface (321a) and the second inclined surface (81) are gradually inclined towards the first limiting portion (4) from top to bottom.

Images