A quick-change die structure

Abstract

The utility model wants to solve the technical problem to provide a quick change mould structure, this quick change mould structure need not with the help of the crane, can realize the replacement of mould, need not repositioning leveling to replace new mould, effectively improve the dismounting replacement efficiency of mould. The quick change mould structure includes front mould subassembly, rear mould subassembly, front mould fixed plate, rear mould fixed plate, and the front mould subassembly includes front mould blank and front mould, and the front mould is set in the rear side of front mould blank through first detachable structure. The rear mould subassembly includes rear mould blank, rear mould, ejector pin assembly, and the rear mould is set in the front side of rear mould blank and is corresponding with the front mould through second detachable structure. The front mould is replaced with new front mould through first detachable structure, and the rear mould and ejector pin assembly are replaced with new rear mould and ejector pin assembly through second detachable structure, which greatly shortens the replacement time, and the front mould blank and rear mould blank remain unchanged when replacing the front mould and rear mould, without calibration leveling.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a quick mold change structure. Background Technology

[0002] Barrier-type terminal blocks are commonly used components in the electrical field. Due to their compact structure, convenient wiring, and low cost, they are widely used for wire connections in electrical control cabinets, PCB boards, and other applications. Existing barrier-type terminal blocks typically include an insulating housing, conductive components housed within the housing, and screws for clamping the wires. The insulating housing is generally injection molded using an injection molding machine. Different specifications of barrier-type insulating housings require different molds. Currently, the front and rear molds of injection molding machines are separate units, resulting in significant weight and size. Disassembly and replacement require a crane, making the process cumbersome. After replacement, the new mold also requires positioning and leveling, leading to low disassembly and replacement efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a quick mold change structure, which can change the mold without the aid of a crane, and there is no need to reposition and level after replacing the mold, thus effectively improving the efficiency of mold disassembly and replacement.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a quick mold change structure, applied to an injection molding machine, including a front mold assembly, a rear mold assembly, a front mold fixing plate, and a rear mold fixing plate;

[0005] The front mold fixing plate is fixed to the fixed mold side of the injection molding machine, and the rear mold fixing plate is fixed to the moving mold side of the injection molding machine. The rear mold fixing plate is provided with ejector pin through holes for ejector pins of the injection molding machine to pass through.

[0006] The front mold assembly includes a front mold blank and a front mold core. The front mold blank is detachably disposed on the rear surface of the front mold fixing plate, and the front mold core is disposed on the rear side of the front mold blank through a first detachable structure.

[0007] The rear mold assembly includes a rear mold blank, a rear mold core, and an ejector pin assembly;

[0008] The left and right sides of the front surface of the rear mold fixing plate are respectively detachably provided with mold feet, and the rear mold blank is detachably provided on the rear mold fixing plate and located in front of the two mold feet.

[0009] The rear mold fixing plate, the rear mold blank, and the two mold feet together form a receiving groove;

[0010] The rear mold core is disposed on the front side of the rear mold blank and corresponds to the front mold core via a second detachable structure;

[0011] The ejector pin assembly is located on the rear side of the rear mold blank and in the receiving groove. The ejector pin assembly is used to eject the injection-molded part.

[0012] The front mold blank has four front mold guide sleeves, and the rear mold blank has four rear mold guide pillars corresponding to the four front mold guide sleeves.

[0013] Furthermore, a rear mold support plate is detachably provided on the rear side of the rear mold core to match it.

[0014] Furthermore, the ejector pin assembly includes an ejector pin plate and an ejector pin base plate;

[0015] The ejector plate is detachably mounted on the front side of the ejector base plate;

[0016] The ejector plate is provided with multiple ejector pins, and reset rods are provided at the four corners of the ejector plate. The front end of the reset rod passes through the rear mold support plate and the rear mold core in sequence and slides in contact with them.

[0017] A reset spring is sleeved on the reset rod;

[0018] The rear side of the ejector base plate is detachably provided with an ejector push plate, and four guide holes are symmetrically arranged in pairs on the ejector push plate, and a guide sleeve is provided in each of the four guide holes.

[0019] The rear mold blank has four guide pillars symmetrically arranged in pairs and corresponding to four guide sleeves. The rear ends of the four guide pillars are all set on the rear mold fixing plate.

[0020] The ejector plate is sleeved on four guide posts by four guide sleeves;

[0021] The ejector plate and ejector base plate are mounted on the ejector push plate via a third detachable structure.

[0022] Furthermore, the rear mold support plate is detachably provided with two support columns that are symmetrically arranged vertically;

[0023] The front ends of the two support columns pass through the ejector plate, the ejector base plate, and the ejector plate in sequence and then abut against the rear mold support plate.

[0024] Furthermore, the first detachable structure includes a first mounting groove that is adapted to the front mold core and is disposed on the rear side surface of the front mold blank.

[0025] The bottom of the first mounting groove is provided with a plurality of first threaded holes;

[0026] The front mold core is provided with a plurality of first countersunk holes, the number of which is the same as the number of first threaded holes and corresponds one-to-one;

[0027] Each first countersunk hole is equipped with a first countersunk screw. When the mold core is located in the first mounting groove, the first countersunk screw is threadedly connected to the corresponding first threaded hole.

[0028] Furthermore, the number of the multiple first threaded holes is six;

[0029] One is provided at the upper and lower ends of the bottom of the first mounting groove and is located in the middle of the left and right direction;

[0030] Two mounting grooves are provided at each of the left and right ends of the bottom of the groove and are evenly distributed along its height direction.

[0031] Furthermore, the second detachable structure includes a second mounting groove provided on the front surface of the rear mold blank that is adapted to the rear mold core.

[0032] The second mounting groove completely penetrates the rear mold blank, and the rear mold core and the rear mold support plate are located within the second mounting groove;

[0033] The mold foot is provided with multiple second threaded holes, which are evenly distributed along its height direction;

[0034] Multiple second countersunk holes are provided on both the left and right sides of the rear mold core. Each second countersunk hole passes through the rear mold core and the rear mold support plate in sequence. The number of multiple second countersunk holes is the same as the number of multiple second threaded holes and they correspond one-to-one.

[0035] Each second countersunk hole is equipped with a second countersunk screw. When the rear mold core and the rear mold support plate are located in the second mounting groove, the second countersunk screw is threadedly connected to the corresponding second threaded hole.

[0036] Furthermore, the third detachable structure includes two third countersunk holes disposed on the ejector plate;

[0037] The two third countersunk holes are located at the upper and lower ends of the ejector plate, respectively, and each third countersunk hole passes through the ejector plate and the ejector base plate in sequence;

[0038] The ejector plate is provided with two third threaded holes, which correspond to two third countersunk holes;

[0039] Each third countersunk hole is equipped with a third countersunk screw, which is threadedly connected to the corresponding third threaded hole.

[0040] Furthermore, the rear mold core is provided with two fourth countersunk holes, which correspond to the two third countersunk holes respectively;

[0041] The rear mold support plate is provided with two fourth threaded holes and corresponding to two fourth countersunk holes, and the fourth thread completely penetrates the rear mold support plate;

[0042] Both of the fourth countersunk holes are equipped with fourth countersunk screws, and the fourth countersunk screws are threadedly connected to the corresponding fourth threaded holes.

[0043] The beneficial effects of this utility model are as follows:

[0044] 1. The front mold assembly includes the front mold blank and the front mold core, and the rear mold assembly includes the rear mold blank, the rear mold core, and the ejector pin assembly. When it is necessary to change the mold to process different injection molded products, it is only necessary to disassemble the front mold core through the first detachable structure and replace it with a new front mold core, and replace the rear mold core and ejector pin assembly with a new rear mold core and ejector pin assembly through the second detachable structure. The front mold core or the rear mold core and ejector pin assembly are relatively small in size and weight, and can be replaced without the need for tools such as cranes, which greatly shortens the replacement time.

[0045] 2. Since the front mold blank is set on the front mold fixing plate and the rear mold blank is set on the two mold feet, it was calibrated and leveled during the first installation. When the front mold core and the rear mold core are replaced, the front mold blank and the rear mold blank remain unchanged. Therefore, no calibration and leveling are required when replacing the new front mold core and the rear mold core. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the quick-change mold structure described in this utility model;

[0047] Figure 2 This is a schematic diagram of the combined structure of the front mold fixing plate and the front mold assembly described in this utility model;

[0048] Figure 3 This is an exploded view of the front mold assembly described in this utility model;

[0049] Figure 4 This is a schematic diagram of the combined structure of the rear mold fixing plate and the rear mold assembly described in this utility model;

[0050] Figure 5 This is a partial exploded view of the rear mold assembly described in this utility model;

[0051] Figure 6 This is a side view of the rear mold assembly described in this utility model;

[0052] Figure 7 This is a schematic diagram showing the state of the rear mold core and rear mold support plate separated from the rear mold blank according to this utility model;

[0053] Figure 8 This is a schematic diagram of the combined structure of the rear mold core, the rear mold support plate, and the mold feet described in this utility model;

[0054] Figure 9 This is a schematic diagram of a partial structure of the ejector pin assembly described in this utility model;

[0055] Figure 10 This is a schematic diagram of the combined structure of the rear mold core, rear mold support plate and ejector pin assembly described in this utility model;

[0056] The markings in the diagram are as follows: Front mold fixing plate 1, Rear mold fixing plate 2, Front mold assembly 3, Front mold blank 301, Front mold core 302, Front mold guide sleeve 303, Rear mold assembly 4, Rear mold blank 401, Rear mold core 402, Ejector pin assembly 403, Mold foot 404, Receiving groove 405, Rear mold guide post 406, Rear mold support plate 407, Ejector pin plate 4031, Ejector pin base plate 4032, Ejector pin 4033, Return spring 4034, Return rod 4035, Ejector pin push plate 4036, Guide sleeve 4037, Guide post 4038, Support post 5, First mounting groove 6, First threaded hole 7, First countersunk hole 8, First countersunk screw 9, Second mounting groove 10, Second threaded hole 11, Second countersunk hole 12, Second countersunk screw 13, Third threaded hole 14, Third countersunk hole 15, Third countersunk screw 16, Fourth countersunk hole 17, Fourth countersunk screw 18. Detailed Implementation

[0057] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0058] It should be noted that all directional indicator terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" in the embodiments of this application indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. They are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0059] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0061] like Figure 1-10 As shown, this quick-change mold structure is applied to an injection molding machine and includes a front mold assembly 3, a rear mold assembly 4, a front mold fixing plate 1, and a rear mold fixing plate 2.

[0062] The front mold fixing plate 1 is fixed to the fixed mold side of the injection molding machine, the rear mold fixing plate 2 is fixed to the moving mold side of the injection molding machine, the rear mold fixing plate 2 is provided with ejector pin through holes for ejector pins of the injection molding machine to pass through, and the front mold fixing plate 1 is provided with positioning rings, etc.

[0063] The front mold assembly 3 includes a front mold blank 301 and a front mold core 302. The front mold blank 301 is detachably disposed on the rear surface of the front mold fixing plate 1, and is generally fixed by countersunk screws. The front mold core 302 is disposed on the rear side of the front mold blank 301 through a first detachable structure, that is, the front mold core 302 is embedded inside the front mold blank 301. The front mold core 302 can be disassembled and installed through the first detachable structure. Through the split design, only the front mold core 302 needs to be replaced, so that the weight and volume of the replaced parts are relatively small, and the replacement operation can be completed manually without the need for cranes or other tools.

[0064] The rear mold assembly 4 includes a rear mold blank 401, a rear mold core 402, and an ejector pin assembly 403;

[0065] The front surface of the rear mold fixing plate 2 is detachably provided with mold feet 404 on both the left and right sides, which are generally fixed by countersunk screws, and there are two of them. The rear mold blank 401 is detachably provided on the rear mold fixing plate 2 and located in front of the two mold feet 404. It is generally fixed by countersunk screws, and there are four of them, two on each side. That is, the countersunk screws used to fix the rear mold blank 401 will pass through the mold feet 404 on the corresponding side and be fixed on the rear mold blank 401.

[0066] The rear mold fixing plate 2, the rear mold blank 401 and the two mold feet 404 together form a receiving groove 405;

[0067] The rear mold core 402 is disposed on the front side of the rear mold blank 401 via a second detachable structure and corresponds to the front mold core 302;

[0068] The ejector pin assembly 403 is disposed on the rear side of the rear mold blank 401 and located in the receiving groove 405. The ejector pin assembly 403 is used to eject the injection-molded part, that is, the ejector pin assembly 403 is pushed to move by the ejector pin of the injection molding machine through the ejector pin hole to achieve the ejection of the part.

[0069] The front mold blank 301 has four front mold guide sleeves 303, and the rear mold blank 401 is provided with four rear mold guide pillars 406 corresponding to the four front mold guide sleeves 303. The front mold guide sleeves 303 and the rear mold guide pillars 406 ensure that the moving mold and the fixed mold can be accurately aligned when the mold is closed and smoothly separated when the mold is opened.

[0070] like Figure 7 , Figure 8 , Figure 10 As shown, in this embodiment, in order to further improve the strength of the rear mold core 402, a rear mold support plate 407 adapted to it is detachably provided on the rear side of the rear mold core 402. It is generally fixed by countersunk screws. By fixing the rear mold support plate 407 and the rear mold core 402 into a whole, the strength of the rear mold core 402 is effectively improved.

[0071] like Figure 5 , Figure 6 , Figure 8-10 As shown, in this embodiment, preferably, the ejector pin assembly 403 includes an ejector pin plate 4031 and an ejector pin base plate 4032;

[0072] The ejector plate 4031 is detachably mounted on the front side of the ejector base plate 4032. It is usually fixed by countersunk screws, and there are four of them, two on each side.

[0073] The ejector plate 4031 is provided with a plurality of ejector pins 4033. A reset rod 4034 is provided at each of the four corners of the ejector plate 4031. The front end of the reset rod 4034 passes through the rear mold support plate 407 and the rear mold core 402 in sequence and slides in contact with them. That is, the rear mold core 402 is provided with a countersunk hole, which passes through the rear mold core 402 and the rear mold support plate 407 in sequence. The front end of the reset rod 4034 passes through the corresponding countersunk hole. The front end of the reset rod 4034 is provided with a spring head. During the reciprocating motion of the ejector base plate 4032, this spring head, which is larger than the rod body, is restricted in the countersunk hole of the rear mold core 402, thereby preventing the reset rod 4034 from dislodging from the countersunk hole and playing a role in axial positioning.

[0074] A reset spring 4035 is sleeved on the reset rod 4034. It should be noted that the ejector plate 4031, ejector base plate 4032, multiple ejector pins, four reset rods 4034 and reset spring 4035 are integrated with the rear mold core 402. That is, when the rear mold core 402 is replaced, the ejector plate 4031, ejector base plate 4032, multiple ejector pins, four reset rods 4034 and reset spring 4035 are also replaced together.

[0075] The rear side of the ejector base plate 4032 is detachably provided with an ejector push plate 4036. Four guide holes are symmetrically arranged in pairs on the ejector push plate 4036, and a guide sleeve 4037 is provided in each of the four guide holes.

[0076] The rear mold blank 401 is symmetrically provided with four guide pillars 4038 in pairs and corresponding to four guide sleeves 4037. The rear ends of the four guide pillars 4038 are all provided on the rear mold fixing plate 2.

[0077] The ejector plate 4036 is sleeved on the four guide posts 4038 through four guide sleeves 4037, ensuring that the ejector plate 4036 moves smoothly and straight when ejecting and retracting, and preventing the ejector from bending, jamming or damaging the cavity surface due to uneven force.

[0078] The ejector plate 4031 and ejector base plate 4032 are mounted on the ejector push plate 4036 via a third detachable structure. The ejector plate 4031 and ejector base plate 4032 can be separated from the ejector push plate 4036 via the third detachable structure, making it convenient to disassemble and replace them together with the rear mold core 402.

[0079] like Figure 6 , Figure 9 As shown, in this embodiment, in order to reduce the impact of injection pressure on the rear mold blank 401 during injection molding, the rear mold support plate 407 is detachably provided with two support columns 5, which are symmetrically arranged vertically and vertically, and are generally fixed by countersunk screws.

[0080] The front ends of the two support columns 5 pass through the ejector plate 4036, ejector base plate 4032, and ejector plate 4031 in sequence and then abut against the rear mold support plate 407. That is, the two support columns 5 only pass through the ejector plate 4036, ejector base plate 4032, and ejector plate 4031. The two support columns are not exposed to the ejector plate 4036, ejector base plate 4032, and ejector plate 4031 and do not exert force on them. The two support columns 5 abut against the rear mold support plate 407. Since the rear mold support plate 407 and the rear mold core 402 are fixed as a whole, the injection pressure generated on the rear mold core 402 during injection is effectively distributed, thereby reducing the force of the rear mold core 402 on the rear mold blank 401 and effectively protecting and preventing the deformation of the rear mold blank 401.

[0081] like Figure 2 , Figure 3 As shown, in this embodiment, preferably, the first detachable structure includes a first mounting groove 6 that is adapted to the front mold core 302 and is provided on the rear side surface of the front mold blank 301. It should be noted that the first mounting groove 6 does not completely penetrate the front mold blank 301, that is, the depth of the first mounting groove 6 is less than the thickness of the front mold blank 301.

[0082] The bottom of the first mounting groove 6 is provided with a plurality of first threaded holes 7;

[0083] The front mold core 302 is provided with a plurality of first countersunk holes 8, the number of the plurality of first countersunk holes 8 being the same as the number of the plurality of first threaded holes 7 and corresponding one-to-one;

[0084] Each first countersunk hole 8 is provided with a first countersunk screw 9. When the front mold core 302 is located in the first mounting groove 6, the first countersunk screw 9 is threadedly connected to the corresponding first threaded hole 7. The front mold blank 301 and the front mold core 302 can be installed and disassembled through multiple first countersunk holes 8 and multiple first threaded holes 7. In addition, since the first mounting groove 6 matches the front mold core 302, the first mounting groove 6 has a limiting and calibrating function for the front mold core 302. The front mold core 302 can be installed in the first mounting groove 6 without the need for calibration and leveling.

[0085] like Figure 2 , Figure 3 As shown, in this embodiment, preferably, the number of the plurality of first threaded holes 7 is six;

[0086] One is provided at the top and bottom of the first mounting groove 6 and is located at the middle in the left-right direction;

[0087] Two mounting grooves are provided at the left and right ends of the groove bottom of the first mounting groove 6 and are evenly distributed along its height direction. When tightening the first countersunk screw 9 during assembly, a symmetrical and cross sequence can be used to gradually tighten it. This can ensure that the front mold core 302 is evenly flattened and provide better assembly accuracy.

[0088] like Figure 5 , Figure 7 , Figure 8 As shown, in this embodiment, preferably, the second detachable structure includes a second mounting groove 10 provided on the front surface of the rear mold blank 401 and adapted to the rear mold core 402.

[0089] The second mounting groove 10 completely penetrates the rear mold blank 401, and the rear mold core 402 and the rear mold support plate 407 are both located within the second mounting groove 10;

[0090] The mold foot 404 is provided with a plurality of second threaded holes 11 and is evenly distributed along its height direction, that is, each mold foot 404 is provided with a plurality of second threaded holes 11 along its height direction;

[0091] Multiple second countersunk holes 12 are provided on both the left and right sides of the rear mold core 402. Each second countersunk hole 12 passes through the rear mold core 402 and the rear mold support plate 407 in sequence. The number of multiple second countersunk holes 12 is the same as the number of multiple second threaded holes 11 and they correspond one-to-one.

[0092] Each second countersunk hole 12 is provided with a second countersunk screw 13. When the rear mold core 402 and the rear mold support plate 407 are located in the second mounting groove 10, the second countersunk screw 13 is threadedly connected to the corresponding second threaded hole 11. The rear mold core 402 and the rear mold support plate 407 can be disassembled and installed with the rear mold blank 401 by multiple second countersunk screws 13 and multiple second threaded holes 11. In addition, since the second mounting groove 10 matches the rear mold core 402 and the rear mold support plate 407, the second mounting groove 10 has a limiting and calibrating function for the rear mold core 402 and the rear mold support plate 407. The rear mold core 402 and the rear mold support plate 407 can be installed in the second mounting groove 10 without calibration and leveling.

[0093] like Figure 9 , Figure 10 As shown, in this embodiment, preferably, the third detachable structure includes two third countersunk holes 15 disposed on the ejector plate 4031;

[0094] The two third countersunk holes 15 are located at the upper and lower ends of the ejector plate 4031, respectively, and each third countersunk hole 15 passes through the ejector plate 4031 and the ejector base plate 4032 in sequence.

[0095] The ejector plate 4036 is provided with two third threaded holes 14, which correspond to two third countersunk holes 15.

[0096] Each third countersunk hole 15 is provided with a third countersunk screw 16, which is threadedly connected to the corresponding third threaded hole 14. The third countersunk screw 16 and the third threaded hole 14 can be used to disassemble and install the ejector plate 4031, the ejector base plate 4032 and the ejector push plate 4036.

[0097] like Figure 10 As shown, in this embodiment, in order to facilitate the turning of the third countersunk screw 16, the rear mold core 402 is provided with two fourth countersunk holes 17 corresponding to the two third countersunk holes 15.

[0098] The rear mold support plate 407 is provided with two fourth threaded holes, which correspond to and are connected to two fourth countersunk holes 17 respectively. The fourth thread completely penetrates the rear mold support plate 407.

[0099] Each of the two fourth countersunk holes 17 is provided with a fourth countersunk screw 18, which is threadedly connected to the corresponding fourth threaded hole. When it is necessary to tighten the third countersunk screw 16, the corresponding fourth countersunk screw 18 can be unscrewed first. Then, the screwdriver can be passed through the corresponding fourth countersunk hole and the fourth threaded hole in sequence to contact the third countersunk screw 16 and tighten it. The fourth countersunk screw 18 and the fourth threaded hole can not only fix the rear mold blank 401 and the rear mold support plate 407 into a whole, but also facilitate the disassembly and installation of the ejector plate 4031 and the ejector base plate 4032 by tightening the third countersunk screw 16, which achieves two goals at once.

[0100] Working principle:

[0101] Loosen the six first countersunk screws 9, remove the front mold core 302, push the new front mold core 302 into the first mounting groove 6, and tighten the six first countersunk screws 9; loosen the two fourth countersunk screws 18, then loosen the two third countersunk screws 16 through the two fourth countersunk holes and the fourth threaded hole, then loosen the four second countersunk screws 13, remove the rear mold core 402, the rear mold support plate 407 and the ejector pin assembly 403, place the new rear mold core 402, the rear mold support plate 407 and the ejector pin assembly 403 as a whole into the second mounting groove 10, tighten the four second countersunk screws 13, then tighten the two third countersunk screws 16, and then tighten the two fourth countersunk screws 18.

[0102] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A quick-change mold structure, applied to an injection molding machine, characterized in that: Includes front mold assembly (3), rear mold assembly (4), front mold fixing plate (1), and rear mold fixing plate (2); The front mold fixing plate (1) is fixed to the fixed mold side of the injection molding machine, and the rear mold fixing plate (2) is fixed to the moving mold side of the injection molding machine. The rear mold fixing plate (2) is provided with ejector pin through holes for ejector pins of the injection molding machine to pass through. The front mold assembly (3) includes a front mold blank (301) and a front mold core (302). The front mold blank (301) is detachably disposed on the rear surface of the front mold fixing plate (1), and the front mold core (302) is disposed on the rear side of the front mold blank (301) through a first detachable structure. The rear mold assembly (4) includes a rear mold blank (401), a rear mold core (402), and an ejector pin assembly (403). The left and right sides of the front surface of the rear mold fixing plate (2) are respectively provided with mold feet (404), and the rear mold blank (401) is detachably mounted on the rear mold fixing plate (2) and located in front of the two mold feet (404). The rear mold fixing plate (2), the rear mold blank (401) and the two mold feet (404) together form a receiving groove (405). The rear mold core (402) is disposed on the front side of the rear mold blank (401) and corresponds to the front mold core (302) via a second detachable structure; The ejector assembly (403) is disposed on the rear side of the rear mold blank (401) and located in the receiving groove (405). The ejector assembly (403) is used to eject the injection-molded part. The front mold blank (301) has four front mold guide sleeves (303), and the rear mold blank (401) has four rear mold guide pillars (406) corresponding to the four front mold guide sleeves (303).

2. The quick-change mold structure according to claim 1, characterized in that: The rear mold core (402) is detachably provided with a matching rear mold support plate (407).

3. The quick-change mold structure according to claim 2, characterized in that: The ejector pin assembly (403) includes an ejector pin plate (4031) and an ejector pin base plate (4032). The ejector plate (4031) is detachably mounted on the front side of the ejector base plate (4032); The ejector plate (4031) is provided with a plurality of ejector pins (4033), and reset rods (4034) are provided at the four corners of the ejector plate (4031). The front end of the reset rod (4034) passes through the rear mold support plate (407) and the rear mold core (402) in sequence and slides in contact with them. A reset spring (4035) is sleeved on the reset rod (4034); The ejector base plate (4032) is detachably provided with an ejector push plate (4036) on its rear side. Four guide holes are symmetrically arranged on the ejector push plate (4036), and a guide sleeve (4037) is provided in each of the four guide holes. The rear mold blank (401) is symmetrically provided with four guide pillars (4038) in pairs and corresponding to four guide sleeves (4037). The rear ends of the four guide pillars (4038) are all provided on the rear mold fixing plate (2). The ejector plate (4036) is sleeved on four guide posts (4038) via four guide sleeves (4037); The ejector plate (4031) and ejector base plate (4032) are mounted on the ejector push plate (4036) via a third detachable structure.

4. The quick-change mold structure according to claim 3, characterized in that: The rear mold support plate (407) is provided with two detachable support columns (5) that are symmetrically arranged vertically. The front ends of the two support columns (5) pass through the ejector plate (4036), the ejector base plate (4032), and the ejector plate (4031) in sequence and then abut against the rear mold support plate (407).

5. A quick-change mold structure according to claim 4, characterized in that: The first detachable structure includes a first mounting groove (6) that is adapted to the front mold core (302) and is provided on the rear side surface of the front mold blank (301). The bottom of the first mounting groove (6) is provided with a plurality of first threaded holes (7); The front mold core (302) is provided with a plurality of first countersunk holes (8), the number of the plurality of first countersunk holes (8) is the same as the number of the plurality of first threaded holes (7) and they correspond one to one; Each first countersunk hole (8) is provided with a first countersunk screw (9). When the mold core (302) is located in the first mounting groove (6), the first countersunk screw (9) is threadedly connected to the corresponding first threaded hole (7).

6. A quick-change mold structure according to claim 5, characterized in that: The number of the multiple first threaded holes (7) is six; The first mounting groove (6) has one at each of the upper and lower ends of the groove bottom and is located in the middle of the left and right direction; Two mounting grooves are provided at the left and right ends of the bottom of the first mounting groove (6) and are evenly distributed along its height direction.

7. A quick-change mold structure according to claim 6, characterized in that: The second detachable structure includes a second mounting groove (10) provided on the front surface of the rear mold blank (401) and adapted to the rear mold core (402). The second mounting groove (10) completely penetrates the rear mold blank (401), and the rear mold core (402) and the rear mold support plate (407) are located in the second mounting groove (10); The mold foot (404) is provided with a plurality of second threaded holes (11) and is evenly distributed along its height direction; The rear mold core (402) is provided with multiple second countersunk holes (12) on both the left and right sides. Each second countersunk hole (12) passes through the rear mold core (402) and the rear mold support plate (407) in sequence. The number of multiple second countersunk holes (12) is the same as the number of multiple second threaded holes (11) and they correspond one-to-one. Each second countersunk hole (12) is provided with a second countersunk screw (13). When the rear mold core (402) and the rear mold support plate (407) are located in the second mounting groove (10), the second countersunk screw (13) is threadedly connected to the corresponding second threaded hole (11).

8. A quick-change mold structure according to claim 7, characterized in that: The third detachable structure includes two third countersunk holes (15) provided on the ejector plate (4031). The two third countersunk holes (15) are located at the upper and lower ends of the ejector plate (4031) respectively, and each third countersunk hole (15) passes through the ejector plate (4031) and the ejector base plate (4032) in sequence. The ejector plate (4036) is provided with two third threaded holes (14) and corresponding to two third countersunk holes (15); Each third countersunk hole (15) is provided with a third countersunk screw (16), which is threadedly connected to the corresponding third threaded hole (14).

9. A quick-change mold structure according to claim 8, characterized in that: The rear mold core (402) is provided with two fourth countersunk holes (17) which correspond to the two third countersunk holes (15) respectively; The rear mold support plate (407) is provided with two fourth threaded holes and corresponding to two fourth countersunk holes (17), and the fourth threads completely penetrate the rear mold support plate (407). Each of the two fourth countersunk holes (17) is provided with a fourth countersunk screw (18), and the fourth countersunk screw (18) is threadedly connected to the corresponding fourth threaded hole.

Images