Pressure maintaining structure capable of automatically correcting segment difference

Abstract

The utility model relates to the technical field of pressure maintaining jigs, in particular to an automatic segment difference correcting pressure maintaining structure. The lower die and the upper die are arranged in an opening and closing mode, and the lower die is provided with a containing concave part for containing a product; the pre-pressing assemblies are arranged on the lower die, are respectively arranged on two opposite first circumferential sides of the placing concave part, and are used for pre-pressing the two opposite sides of the product; and the side pressing assemblies are arranged on the upper mold and the lower mold correspondingly and are arranged on two opposite second circumferential sides of the containing concave part correspondingly, and when the upper mold and the lower mold are closed, the side pressing assemblies are used for pressing the other two opposite sides of the product. Therefore, the problem of poor pressure maintaining consistency of products is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pressure maintaining jig technical field especially relates to a kind of automatic correction step difference pressure maintaining structure. BACKGROUND

[0002] With the increasing favor of wear product by consumer, the modeling design of wear product is also constantly pushing out new, and most wear products are obtained using injection molding at present, and then more aesthetic appearance structure can be obtained, but with it comes, product structure is more complex, and molding is more difficult;Therefore, to ensure that product can have good appearance size, product pressure maintaining and standing link is particularly important.

[0003] At present, a kind of product component exists in prior art, it needs to be pressure maintained to four sides, but the pressure maintaining structure of the present generally exists the problem of poor pressure maintaining consistency, such as difficult to realize center pressure maintaining, leading to the existence of step difference in different week side of product, leading to high rejection rate;Therefore, the prior art still lacks a kind of pressure maintaining structure capable of improving product pressure maintaining consistency.

[0004] The above information is given as background information only to assist with an understanding of the present disclosure, and does not constitute admission or recognition that any of the above information constitutes prior art with respect to the present disclosure. CONTENT OF UTILITY MODEL

[0005] The utility model provides a kind of automatic correction step difference pressure maintaining structure to solve the problem of poor pressure maintaining consistency in prior art.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of automatic correction step difference pressure maintaining structure, comprising:

[0008] upper die;

[0009] lower die, with the upper die opening and closing setting, with the placing recess for placing product;

[0010] pre-pressing component, setting in the lower die, and respectively being configured on two opposite first week sides of the placing recess, for pre-pressing to the opposite two sides of product;

[0011] And side pressure component, respectively being set in the upper die and the lower die, and respectively being configured on two opposite second week sides of the placing recess, when the upper die and the lower die are closed, the side pressure component is used to press fit to the opposite other two sides of product.

[0012] Preferably, the pre-pressing component includes:

[0013] A pre-locking assembly is arranged on the lower die and is capable of moving towards or away from the placement recess, and is used to press the product;

[0014] A self-locking assembly is arranged on the lower die and is located on the side of the pre-locking assembly away from the placement recess, and when the pre-locking assembly is pressed against the product, the self-locking assembly abuts against the pre-locking assembly to limit the pre-locking assembly from loosening the product.

[0015] Preferably, the pre-locking assembly comprises:

[0016] A pre-locking push block is slidingly arranged on the lower die, one side of the pre-locking push block is used to press the product, and the other side abuts against the self-locking assembly;

[0017] A pre-locking spring is connected to the pre-locking push block and the lower die at both ends, and is used to apply a reset pushing force to the pre-locking push block to separate the product.

[0018] Preferably, the side of the pre-locking push block that is used to press the product is provided with a plug-in protrusion, and the plug-in protrusion is used to plug and pull fit with a hole on the product.

[0019] Preferably, the self-locking assembly comprises:

[0020] A self-locking block is slidingly arranged on the lower die, and the displacement direction of the self-locking block is perpendicular to the displacement direction of the pre-locking assembly, and the self-locking block has a first limiting surface and a second limiting surface arranged adjacent to each other;

[0021] A self-locking spring is connected to the self-locking block and the lower die at both ends, and is used to apply a self-locking pushing force to the self-locking block;

[0022] The self-locking assembly comprises the following states:

[0023] When the pre-locking assembly is pressed against the product, the self-locking spring is stretched, and the self-locking block limits the pre-locking assembly through the first limiting surface;

[0024] When the pre-locking assembly loosens the product, the self-locking spring is compressed, and the pre-locking assembly limits the self-locking block through the second limiting surface.

[0025] Preferably, the side pressing assembly comprises:

[0026] An upper inclined top block is fixedly arranged on the upper die;

[0027] A side push block is slidingly arranged on the lower die and is used to press the side edge of the product, and the side push block has a guide inclined surface arranged opposite to the upper inclined top block, and the upper inclined top block pushes the side push block to press the product through the guide inclined surface;

[0028] and a first side compression spring, two ends of which are connected with the side pushing block and the lower die respectively, for applying a reset pushing force to the side pushing block to separate the product.

[0029] Preferably, the side pushing block comprises:

[0030] a first sub-body part for abutting with the product, the first side compression spring being connected with the first sub-body part and the lower die respectively;

[0031] a second sub-body part, the guide inclined surface being arranged on the second sub-body part, the second sub-body part being arranged opposite to the first sub-body part;

[0032] and a second side compression spring, two ends of which are connected with the first sub-body part and the second sub-body part respectively, the second side compression spring applying a spring force to the product based on the second sub-body part to the first sub-body part.

[0033] Preferably, the upper die is provided with a buckle part, the lower die is provided with a lock part, and the buckle part is movably buckled on the lock part.

[0034] Preferably, the upper die is provided with a plurality of positioning pins, the lower die is provided with a plurality of pin holes corresponding to the plurality of positioning pins, and the positioning pins are movably inserted into the pin holes.

[0035] Preferably, the automatic correction step difference pressure maintaining structure further comprises a pressure test module, the pressure test module comprising a body part shaped according to the product, and a pressure sensing element arranged on the body part, the body part being placed in the placing recess.

[0036] Compared with the prior art, the automatic correction step difference pressure maintaining structure has the following beneficial effects:

[0037] The automatic correction step difference pressure maintaining structure provided by the utility model firstly pre-presses the product through the two pre-pressing assemblies located at the first circumferential side, so that the opposite two sides of the product are positioned by being compressed, and then pre-locks the product, so that the product is not prone to displacement and off-loading during the process of combining the upper die and the lower die; on this basis, after the upper die and the lower die are combined, the side compression assembly compresses the other two opposite sides of the product, so that the product can be positioned by being corrected from all around, the product is not prone to deviation during the pressure maintaining process, the four edges of the product can be centered, and the pressure maintaining consistency is optimized and improved.

[0038] The utility model has other characteristics and advantages, which will be apparent from and / or set forth in the accompanying drawings and the following detailed description, which together serve to explain certain principles of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0040] Figure 1 is the assembly relationship schematic diagram of the automatic correction step difference pressure maintaining structure in the embodiment one of the present application;

[0041] Figure 2 is the structure schematic diagram of the lower die, the pre-pressing assembly and the side pressing assembly in the embodiment one of the present application;

[0042] Figure 3 is the structure schematic diagram of the pre-pressing assembly in the embodiment one of the present application;

[0043] Figure 4 is the structure schematic diagram of the side pressing assembly in the embodiment one of the present application;

[0044] Figure 5 is the assembly relationship schematic diagram of the automatic correction step difference pressure maintaining structure from another perspective in the embodiment one of the present application;

[0045] Figure 6 is the structure schematic diagram of the side pushing block in the embodiment two of the present application.

[0046] Reference signs:

[0047] 1001, first week side; 1002, second week side;

[0048] 1, upper die;

[0049] 2, lower die; 21, placing concave part;

[0050] 3, pre-pressing assembly; 31, pre-locking die assembly; 311, pre-locking pushing block; 312, pre-locking spring; 313, plug-in convex part; 32, self-locking die assembly; 321, self-locking block; 322, self-locking spring; 323, first limiting surface; 324, second limiting surface;

[0051] 4, side pressing assembly; 41, upper inclined top block; 42, side pushing block; 421, guide inclined surface; 422, first split body part; 423, second split body part; 43, first side pressing spring; 44, second side pressing spring;

[0052] 5, buckle part; 6, lock buckle part; 7, positioning pin; 8, pin hole. DETAILED DESCRIPTION

[0053] In order to make the purpose, characteristics and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0054] In the description of the present application, it should be understood that when one component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component arranged in the middle. When one component is considered to be "arranged on" another component, it can be directly arranged on the other component or there can be a component arranged in the middle.

[0055] In addition, the terms "long", "short", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have this particular orientation, be constructed in this particular orientation, and be operated in this particular orientation. It cannot be understood as a limitation of the present application.

[0056] The technical solutions of the present application will be further described below in combination with the specific embodiments. Figures 1-6 The technical solutions of the present application will be further described below in combination with the specific embodiments.

[0057] Embodiment one:

[0058] Please refer to Figure 1 and Figure 2 The present application provides an automatic correction step difference pressure maintaining structure, which comprises an upper die 1, a lower die 2, a pre-pressing assembly 3 and a side pressing assembly 4. The upper die 1 and the lower die 2 are arranged to be opened and closed, that is, the upper die 1 and the lower die 2 can be closed and separated from each other. When the upper die 1 and the lower die 2 are closed to each other, a pressure maintaining cavity is formed between them, and the product is placed in the pressure maintaining cavity. Under the closing force of the upper die 1 and the lower die 2, the pressure maintaining function is realized.

[0059] In the present embodiment, a placing recess 21 for placing the product is arranged at the lower die 2. The placing recess 21 is recessed from the outside to the inside on the side surface of the lower die 2 facing the upper die 1. Preferably, the recessed profile of the placing recess 21 is similar to the surface profile of the product. Based on the above arrangement, when the upper die 1 and the lower die 2 are closed, the placing recess 21 forms the pressure maintaining cavity, and the product can also be preliminarily positioned by the placing recess 21, so that accurate pressure maintaining action can be performed subsequently.

[0060] In another embodiment, a pressure maintaining recess (not shown in the figure) can also be arranged on the side surface of the upper die 1 facing the lower die 2, the pressure maintaining recess is arranged opposite to the placing recess 21, and the pressure maintaining recess is shaped according to the top profile of the product. When the upper die 1 and the lower die 2 are closed, the pressure maintaining recess and the placing recess 21 form a pressure maintaining cavity, and the pressure maintaining and positioning effects can be achieved. It can be understood that the arrangement of the pressure maintaining recess is related to the specific shape of the product, and is not limited here. Whether the pressure maintaining recess is arranged on the upper die 1 or not, it should be included in the interpretation range of the present solution.

[0061] Exemplarily, in the present embodiment, the product has a long columnar feature; accordingly, the opening profile of the placing recess 21 is arranged in a rectangular opening shape, and the inside of the placing recess 21 is arranged in an arc surface to adapt to the profile of the product. Here, for the convenience of description, as shown in Figure 2 the four directions of the placing recess 21 are defined as the first circumferential side 1001, and the other two opposite sides of the placing recess 21 are defined as the second circumferential side 1002.

[0062] Further, the pre-pressing assembly 3 is arranged on the lower die 2. Specifically, the pre-pressing assembly 3 in the present embodiment is two, and the two pre-pressing assemblies 3 are arranged on the two first circumferential sides 1001 of the placing recess 21, respectively, and the pre-pressing assembly 3 is used for pre-pressing the opposite two sides of the product.

[0063] In addition, the side pressing assembly 4 is arranged on the upper die 1 and the lower die 2, respectively, and is arranged on the two second circumferential sides 1002 of the placing recess 21, respectively. When the upper die 1 and the lower die 2 are closed, the side pressing assembly 4 is used for pressing the other two opposite sides of the product.

[0064] Based on the above structure, first, the product is placed in the placing recess 21, so that the product is preliminarily positioned, then the pre-pressing assembly 3 is started, the pre-pressing assembly 3 pre-presses the opposite two sides of the product, which is equivalent to pre-locking the product; then the upper die 1 and the lower die 2 are closed, and during the closing process, the product is pre-locked, so that the product is not easy to deviate; on this basis, the side pressing assembly 4 presses the remaining opposite two sides of the product, so that the four circumferences of the product are finally pressed and positioned, and the product can realize central pressure maintaining, and the pressure maintaining consistency is optimized. Experiments show that the effect of improving the pressure maintaining yield by using the present solution is remarkable and outstanding.

[0065] Further, referring to Figure 2 , in order to pre-press and position the product, the pre-pressing assembly 3 includes a pre-locking die set 31 and a self-locking die set 32.

[0066] The pre-locking module 31 is arranged on the lower mold 2 and can be close to or away from the placement recess 21, and the pre-locking module 31 is used for pressing the product. Specifically, when the pre-locking module 31 is close to the placement recess 21, it can abut against the product, thereby realizing the pressing of the product, and when the pre-locking module 31 is away from the placement recess 21, the product can be released to facilitate the taking and placing of the product.

[0067] On this basis, the self-locking module 32 is arranged on the lower mold 2 and is located on the side away from the placement recess 21 of the pre-locking module 31, and the pre-locking module 31 is used for automatically locking the pre-locking module 31, so that the pre-locking module 31 can maintain the state of pressing the product.

[0068] Specifically, when the pre-locking module 31 is pressed on the product, the self-locking module 32 moves to the side away from the placement recess 21 of the pre-locking module 31 and abuts against the pre-locking module 31 to limit the pre-locking module 31 from releasing the product, thereby realizing the pressure maintaining effect; and when the product needs to be taken out, the self-locking module 32 is driven to move away from the pre-locking module 31, thereby canceling the limiting of the pre-locking module 31, so that the pre-locking module 31 can release the product.

[0069] By adopting the above scheme, on the one hand, the product can be pressed flexibly under the action of the pre-locking module 31, and on the other hand, the pre-locking module 31 can be limited under the action of the self-locking module 32, so as to ensure that the pre-locking module 31 can be firmly pressed on the product. The structure is reasonable, the structure is stable in the pre-locking state of the product, and the product is not easy to shake.

[0070] Reference Figure 2 and Figure 3 In this embodiment, in order to realize the pre-pressing positioning of the product, the pre-locking module 31 includes a pre-locking push block 311 and a pre-locking spring 312. Specifically, the pre-locking push block 311 is slidingly arranged on the lower mold 2, and in this embodiment, a first sliding groove is formed on the lower mold 2, one end of the first sliding groove is communicated with the first circumferential side 1001 of the placement recess 21, and the pre-locking push block 311 is slidingly installed in the first sliding groove. Under the action of the first sliding groove, the pre-locking push block 311 can be close to or away from the placement recess 21.

[0071] Further, one side of the pre-locking push block 311 facing the placement recess 21 is used for pressing the product, and the other side abuts against the self-locking module 32. In one embodiment, the two sides of the pre-locking push block 311 are respectively flat structures, so as to have a larger contact area, and the cooperation between the structures is more stable when the pre-locking push block 311 is pressed or limited.

[0072] In the embodiment, the pre-locking push block 311 is pressed and fitted on one side of the product, and the plug-in protrusion 313 is arranged on the product. Specifically, the plug-in protrusion 313 is used for plug-in cooperation with the hole position on the product. It can be understood that a hole position feature is usually arranged on the side of the product, which includes but is not limited to a charging port, a wire hole or a ventilation hole, to realize various functional requirements of the product.

[0073] Based on the actual situation of the product, the plug-in protrusion 313 is shaped with the hole position feature, and the plug-in protrusion 313 is plug-in arranged in the hole position, so that the pre-locking push block 311 and the product are further positioned, and the placement accuracy of the product in the pre-pressing state is further optimized and improved.

[0074] Meanwhile, the pre-locking spring 312 is located between the pre-locking push block 311 and the placing recess 21, and the pre-pressing spring is parallel to the sliding direction of the pre-locking push block 311. In addition, the pre-locking spring 312 is connected with the pre-locking push block 311 and the lower die 2 at both ends, respectively, for applying a reset pushing force to the pre-locking push block 311 to separate the product. At this time, under the action of the pre-locking spring 312, when the self-locking die set 32 moves away from the pre-locking push block 311, the pre-locking push block 311 can be driven to loosen the product under the action of the reset pushing force, which is fast and efficient.

[0075] Further, with reference to Figure 3 the self-locking die set 32 in the embodiment includes a self-locking block 321 and a self-locking spring 322.

[0076] The self-locking block 321 is slidingly arranged in the lower die 2, and the displacement direction of the self-locking block 321 is perpendicular to the displacement direction of the pre-locking die set 31. Specifically, a second sliding groove is arranged on the lower die 2, and the second sliding groove is parallel to the displacement direction of the upper die 1 and the lower die 2. On this basis, the self-locking block 321 is slidingly arranged in the second sliding groove, and at this time, the self-locking block 321 can reciprocally slide to the side of the pre-locking push block 311 away from the placing recess 21. Meanwhile, the self-locking block 321 has a first limiting surface 323 and a second limiting surface 324 arranged adjacent to each other, and the first limiting surface 323 and the second limiting surface 324 are used for abutting cooperation with the self-locking die set 32 in different states.

[0077] Further, the self-locking spring 322 is located on the side of the self-locking block 321 away from the pre-locking push block 311, and the two ends of the self-locking spring 322 are connected with the self-locking block 321 and the lower die 2, respectively, and are used for applying a self-locking pushing force to the self-locking block 321, and the self-locking pushing force is used for driving the self-locking block 321 to move to the side of the pre-locking push block 311 away from the placing recess 21.

[0078] Based on the above structure, the self-locking die set 32 includes the following states:

[0079] When the pre-locking assembly 31 is pressed to the product, at this time the pre-locking push block 311 slides into the placing recess 21, and the side of the pre-locking push block 311 away from the placing recess 21 is vacant, thereby providing displacement space for the self-locking block 321; at this time the self-locking spring 322 is stretched, and by exerting a self-locking pushing force on the self-locking block 321, the self-locking block 321 is moved to the side of the pre-locking push block 311 away from the placing recess 21, and the pre-locking assembly 31 is limited by the first limiting surface 323, so that the pre-locking push block 311 is pressed to the product and remains in the pressed state.

[0080] Correspondingly, when the pre-locking assembly 31 is released from the product, the self-locking block 321 is pressed, so that the self-locking block 321 is away from the pre-locking push block 311, at this time the self-locking spring 322 is compressed, and the pre-locking push block 311 obtains resetting space; under the action of the pre-locking spring 312, the pre-locking push block 311 is moved to the side of the self-locking block 321, and the pre-locking assembly 31 is limited by the second limiting surface 324 to the self-locking block 321, and the self-locking block 321 waits for the next limiting of the pre-locking push block 311.

[0081] Based on the above setting, when the product needs to be pre-pressed, only the pre-locking push block 311 needs to be pushed into the placing recess 21, at this time the self-locking block 321 can be automatically locked to the pre-locking push block 311 under the pushing of the self-locking spring 322; when the product needs to be taken out of the placing recess 21, only the self-locking block 321 needs to be pressed downward, at this time the pre-locking push block 311 can be automatically reset and released from the product under the action of the pre-locking spring 312, the operation is simple and fast.

[0082] Optionally, in one embodiment, the pre-locking push block 311 and the self-locking block 321 can realize the working and resetting effects through manual operation, in another embodiment, the pre-locking push block 311 or the self-locking block 321 can be connected with a cylinder element, and by starting the cylinder element, the pre-locking push block 311 or the self-locking block 321 is automatically controlled to move, the specific control mode of the pre-locking push block 311 or the self-locking block 321 is not limited, and no matter what specific control mode is adopted, it should be included in the interpretation range of the present scheme.

[0083] After the pre-pressing treatment of the product, the other two sides of the product need to be pressed and reinforced by the side pressing assembly 4.

[0084] Referring to Figure 2 and Figure 4 In the present embodiment, the side pressing assembly 4 includes an upper inclined top block 41, a side push block 42 and a first side pressing spring 43. The upper inclined top block 41 is fixedly installed on the upper die 1, and the upper inclined top block 41 has an inclined top protrusion protruding towards the side of the lower die 2.

[0085] Meanwhile, the side pushing block 42 is used for pressing the product. The side pushing block 42 is slidingly arranged in the lower mold 2. In this embodiment, the lower mold 2 is provided with a third sliding groove which is communicated with the placing recess 21, and the side pushing block 42 is slidingly arranged in the third sliding groove.

[0086] In addition, the side pushing block 42 is provided with a guide inclined surface 421 which is opposite to the upper inclined ejector block 41. It can be understood that the inclined protrusion in the upper inclined ejector block 41 is opposite to the guide inclined surface 421. During the closing process of the upper mold 1 and the lower mold 2, the inclined protrusion and the guide inclined surface 421 slide against each other. As the closing distance is reduced, the guide inclined surface 421 provides a pushing force for the side pushing block 42, so that the upper inclined ejector block 41 pushes the side pushing block 42 to press the product, thereby reinforcing the product.

[0087] Further, with reference to Figure 4 , the first side pressing spring 43 is located between the placing recess 21 and the side pushing block 42, and the two ends of the first side pressing spring 43 are connected with the side pushing block 42 and the lower mold 2 respectively. The first side pressing spring 43 is used for exerting a reset pushing force on the side pushing block 42 to separate the product. When the upper mold 1 and the lower mold 2 are separated, the upper inclined ejector block 41 and the side pushing block 42 are mutually released, and under the action of the reset pushing force, the side pushing block 42 is released from the product, so as to facilitate the taking and placing of the product.

[0088] Further, with reference to Figure 5 In order to improve the stability of the upper mold 1 and the lower mold 2 during closing, the upper mold 1 is provided with a buckle member 5, and the lower mold 2 is provided with a lock member 6, and the buckle member 5 is movably buckled with the lock member 6. In this embodiment, the buckle member 5 adopts an elastic buckle structure, which has a clamping jaw capable of swinging and can keep the clamping jaw in a buckled state under the action of elastic force.

[0089] Correspondingly, the lock member 6 in this embodiment is provided in a block shape, the buckle member 5 is located on one side of the upper mold 1, the lock member 6 is fixedly arranged on one side of the lower mold 2, and the buckle member 5 and the lock member 6 are opposite to each other. The side of the lock member 6 facing the upper mold 1 is provided with a guide inclined surface for slidingly abutting against the buckle member 5, and the side of the lock member 6 opposite to the side facing the upper mold 1 is provided with a buckling surface for buckling with the buckle member 5.

[0090] Based on the above structure, during the closing process of the upper mold 1 and the lower mold 2, the clamping jaw of the buckle member 5 abuts against the guide inclined surface, thereby driving the clamping jaw to swing outward, and the clamping jaw can pass through the lock member 6. Until the upper mold 1 and the lower mold 2 are closed, the clamping jaw is away from the lock member 6, and under the action of the elastic force, the clamping jaw is buckled into the buckling surface, thereby realizing the automatic buckling function. On the one hand, the closeness of the upper mold 1 and the lower mold 2 during closing is improved, and on the other hand, the buckling operation is convenient and efficient.

[0091] It can be understood that in another embodiment, another form of locking structure or magnetic attraction structure can also be used to lock and reinforce the upper mold 1 and the lower mold 2. The specific setting of the locking structure is not limited, as long as the connection tightness of the upper mold 1 and the lower mold 2 in the closed mold state can be increased, which should be included in the technical scheme of the present application.

[0092] In addition, in order to further optimize the locking effect between the upper mold 1 and the lower mold 2, the cooperating buckle 5 and the locking piece 6 can be provided in multiple groups, such as two groups, three groups or four groups, etc. The specific number of settings is not limited. In the present embodiment, the buckle 5 and the locking piece 6 are provided in two groups as an example. By providing multiple groups of cooperating buckles 5 and locking pieces 6 on the upper mold 1 and the lower mold 2, the upper mold 1 and the lower mold 2 can be provided with multi-point reinforcement, and the locking effect is further optimized.

[0093] Further, referring to Figure 5 The upper mold 1 is provided with a plurality of positioning pins 7, and the lower mold 2 is provided with a plurality of pin holes 8 corresponding to the plurality of positioning pins 7. The positioning pins 7 are movably inserted into the pin holes 8.

[0094] Based on the above setting, the mold closing precision of the upper mold 1 and the lower mold 2 can be improved through the insertion and cooperation of the positioning pins 7 and the pin holes 8. It can be understood that the specific number of positioning pins 7 and pin holes 8 can be adjusted according to actual needs, and is not specifically limited. In the present embodiment, four groups of positioning pins 7 and pin holes 8 arranged in a rectangular shape are used as an example.

[0095] Further, in order to detect the pressure during pressure retention, the present embodiment further comprises a pressure test module (not shown in the figure). The pressure test module comprises a product-shaped body and a pressure sensing element arranged on the body. The body can be placed in the placing recess 21, and the mold closing operation is performed based on this. At this time, the pressure sensing element can abut against the upper mold 1, the lower mold 2, the pre-pressing assembly 3 or the side-pressing assembly 4, etc. to obtain the pressure value. At this time, the pressure sensing element can be connected to a weighing instrument or a data collector through electrical connection to read the value, so as to facilitate the judgment of whether the pressure received by the product meets the requirements of the pressure retention process, and is beneficial to improve the yield of the product.

[0096] It can be understood that in actual application, the pressure sensor can be provided in multiple numbers, and the multiple pressure sensors are arranged at any position of the body. The specific number and position of the pressure sensor are not limited.

[0097] The implementation principle of the embodiment is as follows: the product to be pressure-kept is first placed in the placing recess 21, at this time the placing recess 21 preliminarily positions the product, then the pre-locking push block 311 is pressed to slide into the placing recess 21 until the two pre-locking push blocks 311 are pressed against the opposite sides of the product, at this time the product is pre-pressed and positioned under the action of the self-locking module 32; then the upper die 1 and the lower die 2 are closed, in this process, the upper inclined top block 41 pushes the side push block 42 to move and make the two side push blocks 42 press and reinforce the other two sides of the product, so as to realize the pressure-keeping effect.

[0098] When the pressure-keeping is completed, the self-locking block 321 in the self-locking module 32 is pressed to unlock and release the product from the pre-locking push block 311, at this time the upper die 1 and the lower die 2 are opened, the side push block 42 is reset under the action of the side pressing spring, the product is unlocked, then the product is taken out, and the pressure-keeping is completed.

[0099] Embodiment two:

[0100] Reference Figure 6 On the basis of embodiment one, features not explained in the embodiment are explained in embodiment one, which will not be described here again, the difference between the embodiment and embodiment one is that the side push block 42 in the embodiment includes a first sub-body part 422, a second sub-body part 423 and a second side pressing spring 44.

[0101] The first sub-body part 422 and the second sub-body part 423 are both slidingly arranged in the third sliding groove, and the first sub-body part 422 is closer to the placing recess 21 than the second sub-body part 423.

[0102] On this basis, the first sub-body part 422 is used to abut against the product, and the first side pressing spring 43 is connected with the first sub-body part 422 and the lower die 2; in addition, the guide inclined surface 421 is arranged on the second sub-body part 423, and the second sub-body part 423 is oppositely arranged with the first sub-body part 422; the second side pressing spring 44 is arranged between the first sub-body part 422 and the second sub-body part 423, and the two ends of the second side pressing spring 44 are connected with the first sub-body part 422 and the second sub-body part 423 respectively, and the second side pressing spring 44 applies a pressing force to the product based on the second sub-body part 423 to the first sub-body part 422.

[0103] By adopting the above technical solution, the second side pressing spring 44 can apply additional elastic support to the first sub-body part 422, so as to further promote the side pressing assembly 4 to have greater pressing force when being pressed against the product, which is beneficial to further reducing the step difference of the product during pressure-keeping and further optimizing and improving the consistency of pressure-keeping.

[0104] The foregoing embodiments are merely used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An automatic step correction pressure maintaining structure, characterized by, The utility model relates to a product pre-pressing and side-pressing mould, which comprises: an upper mould (1); a lower mould (2) arranged to open and close with the upper mould (1) and having a placing recess (21) for placing a product; a pre-pressing assembly (3) arranged on the lower mould (2) and respectively arranged on two opposite first circumferential sides (1001) of the placing recess (21) to pre-press two opposite sides of the product; and a side-pressing assembly (4) respectively arranged on the upper mould (1) and the lower mould (2) and respectively arranged on two opposite second circumferential sides (1002) of the placing recess (21) to press the other two opposite sides of the product when the upper mould (1) and the lower mould (2) are closed.

2. The automatic gap-correcting pressure-maintaining structure according to claim 1, characterized by, The pre-pressing assembly (3) comprises: a pre-locking mould assembly (31) arranged on the lower mould (2) and capable of moving close to or away from the placing recess (21) and used for pressing the product; and a self-locking mould assembly (32) arranged on the lower mould (2) and located on a side of the pre-locking mould assembly (31) away from the placing recess (21), the self-locking mould assembly (32) abutting against the pre-locking mould assembly (31) when the pre-locking mould assembly (31) is pressed against the product to limit the pre-locking mould assembly (31) from loosening the product.

3. The automatic gap-correcting pressure-maintaining structure according to claim 2, characterized by, The pre-locking mould assembly (31) comprises: a pre-locking push block (311) slidingly arranged on the lower mould (2), one side of the pre-locking push block (311) being used for pressing the product and the other side abutting against the self-locking mould assembly (32); and a pre-locking spring (312) having two ends respectively connected with the pre-locking push block (311) and the lower mould (2) and used for exerting a reset pushing force on the pre-locking push block (311) to separate the pre-locking push block (311) from the product.

4. The automatic gap-correcting pressure-maintaining structure according to claim 3, characterized by, The side of the pre-locking push block (311) pressed against the product is provided with an insertion protrusion (313) used for pluggable cooperation with a hole on the product.

5. The automatic gap-correcting pressure-maintaining structure according to claim 2, characterized by, The self-locking mould assembly (32) comprises: a self-locking block (321) slidingly arranged on the lower mould (2) and having a displacement direction perpendicular to that of the pre-locking mould assembly (31), the self-locking block (321) being provided with a first limiting surface (323) and a second limiting surface (324) arranged adjacently thereon; and a self-locking spring (322) having two ends respectively connected with the self-locking block (321) and the lower mould (2) and used for exerting a self-locking pushing force on the self-locking block (321); The self-locking mould assembly (32) comprises the following states: when the pre-locking mould assembly (31) is pressed against the product, the self-locking spring (322) is stretched, and the self-locking block (321) limits the pre-locking mould assembly (31) through the first limiting surface (323); when the pre-locking mould assembly (31) loosens the product, the self-locking spring (322) is compressed, and the pre-locking mould assembly (31) limits the self-locking block (321) through the second limiting surface (324).

6. The automatic gap-correcting pressure-maintaining structure according to claim 1, characterized by, The side-pressing assembly (4) comprises: an upper inclined ejector block (41) fixedly arranged on the upper mould (1); A side pushing block (42) is slidably arranged in the lower mold (2) and used to press against the side of the product, the side pushing block (42) has a guide slope (421) arranged opposite to the upper inclined ejector block (41), the upper inclined ejector block (41) pushes the side pushing block (42) to press against the product through the guide slope (421); And a first side pressing spring (43) having two ends respectively connected with the side pushing block (42) and the lower mold (2) and used to apply a reset pushing force to the side pushing block (42) to separate the product.

7. The automatic gap-correcting pressure-maintaining structure according to claim 6, characterized by, The side pushing block (42) comprises: A first part (422) used to abut against the product, the first side pressing spring (43) is connected with the first part (422) and the lower mold (2) respectively; A second part (423), the guide slope (421) is arranged on the second part (423), the second part (423) is arranged opposite to the first part (422); And a second side pressing spring (44) having two ends respectively connected with the first part (422) and the second part (423), the second side pressing spring (44) applies an elastic force to press against the product to the first part (422) based on the second part (423).

8. The automatic gap-correcting pressure-maintaining structure according to claim 1, characterized by, The upper mold (1) is provided with a buckle member (5), the lower mold (2) is provided with a lock member (6), the buckle member (5) is movably buckled with the lock member (6).

9. The automatic gap-correcting pressure-maintaining structure according to claim 1, characterized by, Comprise: The upper mold (1) is provided with a plurality of positioning pins (7), the lower mold (2) has a plurality of pin holes (8) corresponding to the plurality of positioning pins (7), the positioning pins (7) are movably inserted into the pin holes (8).

10. The automatic gap-correcting pressure-maintaining structure according to claim 1, characterized by, Further comprising a pressure test module, the pressure test module comprises a body part shaped according to the product, and further comprises a pressure sensing element arranged on the body part, the body part is placed in the placing recess (21).

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