A highly efficient and environmentally friendly single-cavity mold group

Abstract

The present invention discloses a high-efficiency and environmentally friendly single-cavity row mold group, including a base, a top seat, a hydraulic press, a top slide, a top mold assembly, a bottom mold assembly and a plurality of middle mold assemblies. The upper end surface of the base is fixedly connected to the top seat through fixed columns, a hydraulic press is installed on the top seat, and the telescopic end of the hydraulic press is fixedly connected to the upper end surface of the top slide. The top slide is slidably mounted on the fixed columns, the lower end surface of the top slide is fixedly mounted with a top mounting platform, and the upper end surface of the base is fixedly mounted with a bottom mounting platform; the top mold assembly includes a top mold seat fixedly mounted on the lower end surface of the top mounting platform; the bottom mold assembly includes a bottom mold seat fixedly mounted on the upper end surface of the bottom mounting platform. The present invention has a reasonable structural design, high production efficiency, and a reasonable assembly structure design, which is conducive to subsequent maintenance and can save the investment cost of brake pad molds; it can achieve stable feeding and pressing, and is easy to operate and use.

Description

Technical Field

[0001] The invention relates to the technical field of molds, and in particular to a high-efficiency and environment-friendly single-cavity mold array group. Background Art

[0002] The hot pressing molds for brake pads have successively used single-cavity barrel molds, multi-cavity barrel molds, four-layer eight-strip molds, four-layer 24-piece single-cavity molds, etc. The advantages of the single-cavity barrel mold are uneven heating, unstable product quality, and low production efficiency; the advantages of the multi-cavity barrel mold are uneven heating, unstable product quality, and high production efficiency; the advantages of the four-layer eight-strip mold are uniform heating, stable product quality, and high production efficiency, but it is necessary to add the preforming (cold pressing) process and the cutting process after hot pressing, which is very polluting to the environment and wastes a lot of raw materials for cutting; the advantages of the four-layer 24-piece mold are more uniform heating, more stable product quality, and higher production efficiency. It does not require the cutting process after hot pressing, which saves a lot of raw materials, but it is also necessary to add the preforming (cold pressing) process, which is very polluting to the environment.

[0003] On the basis of the above, how to research and develop a highly efficient and environmentally friendly single-cavity mold group to improve production efficiency and solve problems such as environmental pollution and waste of resources has become a technical problem that needs to be solved in this application. Summary of the invention

[0004] The object of the present invention is to provide a highly efficient and environmentally friendly single-cavity mold group to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high-efficiency and environmentally friendly single-cavity row mold group, comprising a base, a top base, a hydraulic press, a top slide, a top mold assembly, a bottom mold assembly and a plurality of middle mold assemblies, wherein the upper end surface of the base is fixedly connected to the top base through fixed columns, a hydraulic press is installed on the top base, and the telescopic end of the hydraulic press is fixedly connected to the upper end surface of the top slide, the top slide is slidably sleeved on the fixed columns, the lower end surface of the top slide is fixedly installed with a top mounting platform, and the upper end surface of the base is fixedly installed with a bottom mounting platform;

[0007] The top mold assembly includes a top mold base fixedly mounted on the lower end surface of the top mounting platform; the bottom mold assembly includes a bottom mold base fixedly mounted on the upper end surface of the bottom mounting platform;

[0008] The middle mold assembly is distributed between the top mold assembly and the bottom mold assembly, and the middle mold assembly includes a middle mold base;

[0009] The top die base is fixedly installed with die base guide rods around it, and the lower ends of the die base guide rods pass through each middle die base and the bottom die base in sequence and extend into the guide rod cavity in the base;

[0010] The upper end surfaces of the middle mold base and the bottom mold base are both provided with a plurality of mold cavities, the lower end surfaces of the top mold base and the middle mold base are both provided with a plurality of mold heads for inserting into the mold cavities, the middle mold base and the bottom mold base are each provided with a cylinder groove corresponding to each mold cavity, an ejection piston is movably installed in the cylinder groove, and a ejector rod for extending into the mold cavity is extended from the top of the ejection piston.

[0011] Preferably, an upper retraction air cavity and a lower ejection air cavity are formed between the cylinder groove and the ejection piston, and a retraction air path channel and an ejection air path channel are also provided inside the middle mold base and the bottom mold base. The retraction air path channels are respectively connected to each retraction air cavity, and the ejection air path channels are respectively connected to each ejection air cavity.

[0012] Preferably, a mold cavity opening is provided at the outer end of the mold cavity, and an opening baffle for covering and sealing the mold cavity opening is fixedly mounted on the lower end surfaces of the top mold base and the middle mold base.

[0013] Preferably, the interior of the top mold base and the middle mold base are fixedly connected to the top of the opening baffle by vertical baffle screws, the opening baffle is fixedly connected to the outer wall of the mold head by transverse mold head screws, and the side wall of the mold head away from the opening baffle is embedded with a fixed pressure strip, which is fixedly connected to the lower end surface of the top mold base and the middle mold base by pressure strip screws.

[0014] Preferably, heating tube insertion holes are provided at the bottom of each mold cavity corresponding to the middle mold base and the bottom mold base, and heating tubes are inserted into the heating tube insertion holes.

[0015] Preferably, it also includes a deflation action component, which includes a deflation plug plate, a U-shaped frame plate and a deflation action cylinder, the lower ends of the left and right side walls of the top mold base and the middle mold base are fixedly connected with the deflation plug plate by bolts, and the lower ends of the deflation plug plate are provided with a plug plate pin hole, and the upper ends of the left and right side walls of the middle mold base are fixedly connected with the U-shaped frame plate by bolts, and a vertical insertion cavity for inserting the deflation plug plate is formed between the U-shaped frame plate and the side wall of the middle mold base, and the U-shaped frame plate is also provided with a frame plate pin hole corresponding to the plug plate pin hole;

[0016] The outer wall of the U-shaped frame plate is fixedly connected with a deflation cylinder through a plurality of frame plate guide rods, and a plug pin for simultaneously inserting into the plug plate pin hole and the frame plate pin hole is installed at the telescopic end of the deflation cylinder.

[0017] Preferably, it also includes a deflation disc, the outer end surface of the deflation disc is fixedly connected to the telescopic end of the deflation action cylinder, and the inner end surface of the deflation disc is fixedly connected to the latch through a disc spring;

[0018] The degassing disc is slidably mounted on the corresponding frame plate guide rod, and the frame plate guide rod is also mounted with a forced return spring, one end of the forced return spring is in contact with the U-shaped frame plate, and the other end of the forced return spring is in contact with the end surface of the degassing disc.

[0019] Preferably, the deflation action cylinder adopts a magnetic cylinder, which can detect whether the action is in place, etc., to play a protective role.

[0020] Preferably, pull rods for pulling and lifting the lower middle mold base are fixedly installed around the top mold base, and pull rods for pulling and lifting the lower middle mold base are also fixedly installed around the middle mold base.

[0021] Preferably, a heat insulation board is provided between the lower end surface of the top slide and the top mounting platform, and a heat insulation board is also provided between the upper end surface of the base and the bottom mounting platform;

[0022] The upper end surfaces of the middle mold base and the bottom mold base are distributed and fixed with limit blocks, and the inner side walls of the limit blocks are fixed with limit pads for contacting the outer side walls of the opening baffle.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Directly open the cylinder groove on the lower end surface of the middle die base and the bottom die base, and the die head covers the bottom of the cylinder groove. The middle die base and the bottom die base are used as the cylinder body. There is no need to purchase the ejector cylinder separately, which reduces the overall production cost of the die group and greatly saves the investment cost of the brake pad mold;

[0025] 2. After the brake pad is formed and the mold is opened, high-pressure gas is introduced into the ejection air channel, and the high-pressure gas enters each ejection air cavity, driving the ejection piston to rise, so that the ejector rod extends into the mold cavity, and the molded brake pad can be ejected, and the unloading operation is convenient;

[0026] 3. The mold cavity and the die head are assembled together by fixing the pressure strip and the opening baffle, but the mold cavity and the die head are not directly fixed by screws, which effectively ensures the processing accuracy. In the subsequent maintenance process, it can be easily disassembled and the subsequent maintenance is convenient;

[0027] 4. The present invention removes all the original mold frames and adopts 4 mold base guide rods to pass through each layer of molds (multiple middle mold bases and bottom mold bases), reasonably controls the processing accuracy and matching clearance of the mold base guide rods, and when the molds (top mold base and multiple middle mold bases) move up and down, the 4 mold base guide rods move with them, ensuring the movement balance of each layer of molds, and adding a pull rod of each layer to control the opening height, so that stable feeding and pressing can be achieved, and the operation is convenient;

[0028] 5. The deflation action component adopts a pin-type structure, which is small in size and sensitive in action. The whole set of deflation action components has a compact structure, is heat-insulated and shock-resistant, and will not be mistakenly inserted into the pin hole of the plug plate and the pin hole of the frame plate when there is no PLC instruction, and has a double protection function;

[0029] 6. The present invention has a reasonable structural design, can directly process powder package materials, does not require a cold pressing process, has high production efficiency, solves problems such as environmental pollution and waste of resources, and has a reasonable assembly structure design, which is conducive to subsequent maintenance and can save the investment cost of brake pad molds; can achieve stable feeding and pressing, and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the front structure of the first solution of a high-efficiency and environmentally friendly single-cavity mold group;

[0031] Figure 2 It is a schematic diagram of the front structure of the second solution of a high-efficiency and environmentally friendly single-cavity mold group;

[0032] Figure 3 This is a schematic diagram of the front structure of the second solution of a high-efficiency and environmentally friendly single-cavity mold group after mold closing;

[0033] Figure 4 This is a schematic diagram of the front structure of the assembly of each mold component of the second solution of a high-efficiency and environmentally friendly single-cavity mold group;

[0034] Figure 5 This is a schematic diagram of the side structure of the second solution of a high-efficiency and environmentally friendly single-cavity mold group after the mold components and the mold base guide rods are assembled and molded;

[0035] Figure 6 This is a schematic diagram of the side structure of the second solution of a high-efficiency and environmentally friendly single-cavity mold group after the mold is assembled with each mold component and the mold base guide rod;

[0036] Figure 7 It is a schematic diagram of the front structure of the middle mold base of the second solution of a high-efficiency and environmentally friendly single-cavity mold group;

[0037] Figure 8 It is a schematic diagram of the structure of the middle mold base cut from the side of the second solution of a high-efficiency and environmentally friendly single-cavity mold group;

[0038] Fig. 9 It is a structural schematic diagram of the deflation action component of the second solution of a high-efficiency and environmentally friendly single-cavity mold group;

[0039] Fig.10 It is a schematic diagram of the structure of the tie rod in the second solution of a high-efficiency and environmentally friendly single-cavity mold group;

[0040] Fig.11 This is a schematic diagram of the side structure of the bottom mold base in the second solution of a high-efficiency and environmentally friendly single-cavity mold group.

[0041] In the figure: 100-top seat, 101-top slide seat, 102-top mounting platform, 103-fixed column, 104-bottom mounting platform, 105-base, 106-die guide rod, 107-heat insulation board, 1-top die assembly, 11-top die seat, 2-bottom die assembly, 21-bottom die seat, 3-middle die assembly, 31-middle die seat, 32-deflation plug plate, 321-plug plate pin hole, 33-U-shaped frame plate, 331-vertical plug cavity, 332-frame plate pin hole, 34-deflation action cylinder, 35-frame guide rod, 36-latch pin, 37-deflation disc, 38-disc spring, 39-forced return spring, 4-mold cavity, 41-heating tube socket, 5-ejection piston, 51-ejector rod, 52-retraction air path channel, 53-ejection air path channel, 6-mold head, 61-fixed pressure strip, 7-opening baffle, 71-vertical baffle screw, 72-lateral mold head screw, 8-pull rod, 81-upper pull rod, 82-lower pull rod, 83-rod seat, 9-limit block, 91-limit pad. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figures 1 to 11 The present invention provides a technical solution: a high-efficiency and environmentally friendly single-cavity row mold group, including a base 105, a top base 100, a hydraulic press, a top slide 101, a top mold assembly 1, a bottom mold assembly 2 and a plurality of middle mold assemblies 3, the upper end surface of the base 105 is fixedly connected to the top base 100 through a fixed column 103, a hydraulic press is installed on the top base 100, and the telescopic end of the hydraulic press is fixedly connected to the upper end surface of the top slide 101, the top slide 101 is slidably mounted on the fixed column 103, the lower end surface of the top slide 101 is fixedly mounted with a top mounting platform 102, and the upper end surface of the base 105 is fixedly mounted with a bottom mounting platform 104;

[0044] The top mold assembly 1 includes a top mold base 11 fixedly mounted on the lower end surface of the top mounting platform 102; the bottom mold assembly 2 includes a bottom mold base 21 fixedly mounted on the upper end surface of the bottom mounting platform 104;

[0045] The middle mold assembly 3 is distributed between the top mold assembly 1 and the bottom mold assembly 2, and the middle mold assembly 3 includes a middle mold base 31;

[0046] A die base guide rod 106 is fixedly installed around the top die base 11, and the lower end of the die base guide rod 106 passes through each middle die base 31 and the bottom die base 21 in sequence, and extends into the guide rod cavity in the base 105;

[0047] See also Figure 7 The upper end surfaces of the middle mold base 31 and the bottom mold base 21 are both distributed with multiple mold cavities 4, and the lower end surfaces of the top mold base 11 and the middle mold base 31 are both distributed with multiple die heads 6 for inserting into the mold cavities 4. The middle mold base 31 and the bottom mold base 21 are each provided with a cylinder groove corresponding to each mold cavity 4, and an ejection piston 5 is movably installed in the cylinder groove, and a push rod 51 for extending into the mold cavity 4 is extended from the top of the ejection piston 5.

[0048] A cylinder groove can be directly opened on the lower end surface of the middle mold base 31 and the bottom mold base 21, and the die head 6 covers the bottom of the cylinder groove. The middle mold base 31 and the bottom mold base 21 are used as the cylinder body. There is no need to purchase an ejection cylinder separately, which reduces the overall production cost of the mold group and greatly saves the investment cost of the brake pad mold.

[0049] In this embodiment, mold opening springs can be installed between adjacent mold bases of the top mold base 11, multiple middle mold bases 31 and the bottom mold base 21. When the hydraulic press retracts, the elastic force of the mold opening springs enables the molds to be opened between the mold bases. Of course, other mold opening schemes are also possible.

[0050] Attached Figure 1 In the embodiment, each middle mold base 31 is provided with four mold cavities 4, two on the front side and two on the rear side; Figure 2 In the embodiment, each middle mold base 31 is provided with six mold cavities 4, three on the front side and three on the rear side.

[0051] See also Figure 7 The cylinder groove and the ejection piston 5 form an upper retraction air cavity and a lower ejection air cavity. The middle mold base 31 and the bottom mold base 21 are also provided with a retraction air path channel 52 and an ejection air path channel 53. The retraction air path channel 52 is respectively connected to each retraction air cavity, and the ejection air path channel 53 is respectively connected to each ejection air cavity.

[0052] After the brake pad is formed and the mold is opened, high-pressure gas is introduced into the ejection gas channel 53, and the high-pressure gas enters each ejection gas cavity to drive the ejection piston 5 to rise, so that the ejector rod 51 extends into the mold cavity 4, and the molded brake pad can be ejected, and the unloading operation is convenient.

[0053] See also Figure 7-8The outer end of the mold cavity 4 is provided with a mold cavity opening. The arrangement of the mold cavity opening is not only convenient for the operator to put the powder bag material into the mold cavity 4, but also convenient for the brake pad to be removed after subsequent molding; the lower end surfaces of the top mold base 11 and the middle mold base 31 are fixedly installed with an opening baffle 7 for covering the mold cavity opening. After the mold is closed under the drive of the hydraulic press, the opening baffle 7 covers the mold cavity opening to ensure that the powder bag can be heated and extruded in the mold cavity 4.

[0054] See also Figure 7-8 The top mold base 11 and the middle mold base 31 are fixedly connected to the top of the opening baffle 7 through vertical baffle screws 71, and the opening baffle 7 is fixedly connected to the outer wall of the die head 6 through transverse die head screws 72. The side wall of the die head 6 away from the opening baffle 7 is embedded with a fixed pressure strip 61, and the fixed pressure strip 61 is fixedly connected to the lower end surface of the top mold base 11 and the middle mold base 31 through pressure strip screws.

[0055] Since the lower surface of the die head 6 and the inner surface of the die cavity 4 are both the molding surfaces of the die-casting workpiece, no defects are allowed. Therefore, in this embodiment, the die cavity 4 and the die head 6 are assembled together by fixing the pressure strip 61 and the opening baffle 7, but the die cavity 4 and the die head 6 are not directly fixed by screws, which effectively ensures the processing accuracy and can be easily disassembled during subsequent maintenance, making subsequent maintenance convenient.

[0056] The middle mold base 31 and the bottom mold base 21 are provided with heating tube insertion holes 41 at the bottom of each mold cavity 4, and heating tubes are inserted into the heating tube insertion holes 41. The powder bag in the mold cavity 4 is heated by the heating tubes.

[0057] See also Figure 7 and Fig. 9 The present invention also includes a deflation action component, which includes a deflation plug plate 32, a U-shaped frame plate 33 and a deflation action cylinder 34. The lower ends of the left and right side walls of the top mold base 11 and the middle mold base 31 are fixedly connected with the deflation plug plate 32 by bolts. The lower end of the deflation plug plate 32 is provided with a plug plate pin hole 321. The upper ends of the left and right side walls of the middle mold base 31 are fixedly connected with the U-shaped frame plate 33 by bolts. A vertical insertion cavity 331 for inserting the deflation plug plate 32 is formed between the U-shaped frame plate 33 and the side wall of the middle mold base 31. The U-shaped frame plate 33 is also provided with a frame plate pin hole 332 corresponding to the plug plate pin hole 321.

[0058] The outer wall of the U-shaped frame plate 33 is fixedly connected to the deflation cylinder 34 through a plurality of frame plate guide rods 35, and the telescopic end of the deflation cylinder 34 is equipped with a plug 36 for simultaneously inserting into the plug pin hole 321 and the frame plate pin hole 332. A hollow channel 351 is provided in the frame plate guide rod 35, and a heat dissipation hole 352 connected to the hollow channel 351 is also provided on the outer wall of the frame plate guide rod 35. The frame plate guide rod 35 with such a structure can dissipate the heat transferred from the mold in time, effectively preventing the deflation cylinder 34 from being affected by high temperature.

[0059] See also Fig. 9 The present invention also includes a deflation disc 37, the outer end surface of the deflation disc 37 is fixedly connected to the telescopic end of the deflation action cylinder 34, and the inner end surface of the deflation disc 37 is fixedly connected to the latch 36 through a disc spring 38; the disc spring 38 between the deflation action cylinder 34 and the latch 36 is softly connected, which can effectively insulate, shock-proof and prevent bending, and can play a good protective role on the deflation action cylinder 34.

[0060] The degassing disc 37 is slidably mounted on the corresponding frame guide rod 35 on all sides, and a forced return spring 39 is also mounted on the frame guide rod 35. One end of the forced return spring 39 is in contact with the U-shaped frame plate 33, and the other end of the forced return spring 39 is in contact with the end face of the degassing disc 37.

[0061] The deflation cylinder 34 is a magnetic cylinder, a magnetic ring is installed on the piston of the deflation cylinder 34, and a magnetic switch is directly installed on the cylinder barrel of the deflation cylinder 34. The magnetic switch is used to detect the position of the piston stroke, so that it can be used to detect whether the pin 36 is fully inserted or withdrawn.

[0062] The top mold base 11 is fixedly provided with pull rods 8 for pulling up the lower middle mold base 31 , and the middle mold base 31 is also fixedly provided with pull rods 8 for pulling up the lower middle mold base 31 .

[0063] In this embodiment, the pull rod 8 includes an upper pull rod 81 with a smaller rod diameter and a lower pull rod 82 with a larger rod diameter. The bottom of the upper pull rod 81 is fixedly connected to the top of the lower pull rod 82, and a rod seat 83 is integrally provided at the bottom of the lower pull rod 82. The pull rod 8 in this embodiment is provided with two groups, namely, an upper group of pull rods 8 and a lower group of pull rods 8.

[0064] See also Figure 4 In the upper group of tie rods 8, the top of the upper tie rod 81 is fixed in the top die seat 11, the lower end of the upper tie rod 81 is movably arranged in the middle die seat 31 of the first layer, the top end surface of the lower tie rod 82 supports the middle die seat 31 of the first layer, and the rod seat 83 supports the middle die seat 31 of the second layer;

[0065] In the lower group of tie rods 8, the top of the upper tie rod 81 is fixed in the middle mold base 31 of the second layer, the lower end of the upper tie rod 81 is movably inserted in the middle mold base 31 of the third layer, the top end face of the lower tie rod 82 supports the middle mold base 31 of the third layer, and the upper end face of the rod base 83 fits with the corresponding hole position on the bottom of the bottom mold base.

[0066] When opening the mold, the hydraulic press drives the top mounting platform 102 to rise. After the top end surface of the lower pull rod 82 of the upper group fits with the lower end surface of the middle mold base 31 of the first layer, the lower pull rod 82 will pull up the middle mold base 31 of the first layer. After the rod seat 83 fits with the lower end surface of the middle mold base 31 of the second layer, the rod seat 83 will pull up the middle mold base 31 of the second layer. After the top end surface of the lower pull rod 82 of the lower group fits with the lower end surface of the middle mold base 31 of the third layer, the lower pull rod 82 of the lower group will pull the middle mold base 31 of the third layer to move upward, so that it is disengaged from the bottom mold base 21, thereby realizing complete mold opening.

[0067] Since the number of layers of the mold group is relatively large, a mold frame structure is generally used to achieve the movement balance of each mold layer. In this embodiment, the original mold frame is completely removed, and four mold base guide rods 106 are used to pass through each layer of the mold (multiple middle mold bases 31 and bottom mold base 21). The processing accuracy and matching clearance of the mold base guide rods 106 are reasonably controlled. When the mold (top mold base 11 and multiple middle mold bases 31) move up and down, the four mold base guide rods 106 move with it, ensuring the movement balance of each layer of the mold. In addition, the pull rods 8 of each layer are used to control the opening height, so that stable feeding and pressing can be achieved, and the operation is convenient.

[0068] A heat insulation board 107 is provided between the lower end surface of the top slide 101 and the top mounting platform 102, and a heat insulation board 107 is also provided between the upper end surface of the base 105 and the bottom mounting platform 104;

[0069] Please refer to the attached Fig.11 The upper end surfaces of the middle mold base 31 and the bottom mold base 21 are fixed with limit blocks 9, and the inner side walls of the limit blocks 9 are fixed with limit pads 91 for contacting the outer side walls of the opening baffle 7. After the mold is closed, the opening baffle 7 is limited by the limit pads 91 to ensure that the opening baffle 7 can stably cover the mold cavity opening to prevent the processed material from leaking out of the mold cavity 4.

[0070] The working principle of the deflation action component is: during the heating and extrusion molding of the brake pad (the molds are all in the mold closing state), it is also necessary to open the mold cavity 4 for deflation. Figure 5In this embodiment, three middle mold bases 31 are provided. When it is necessary to deflate all the mold cavities 4, all the deflation action cylinders 34 work, driving the latch 36 to be inserted into the corresponding frame plate pin hole 332 and the latch plate pin hole 321. At this time, the deflation latch plate 32 fixed on the top mold base 11 and the U-shaped frame plate 33 fixed on the side wall of the middle mold base 31 of the first layer are locked. Similarly, the deflation latch plate 32 fixed on the middle mold base 31 of the first layer and the U-shaped frame plate 33 fixed on the side wall of the middle mold base 31 of the second layer are locked... Since there is a gap between the latch pin 36 and the latch plate pin hole 321, when the hydraulic press drives the top mounting platform 102 to move upward for a distance, a small gap can be opened between the top mold base 11 and the middle mold base 31 of the first layer, thereby achieving deflation of the mold cavity 4 of the middle mold base 31 of the first layer;

[0071] When the hydraulic press drives the top mounting platform 102 to continue to move upward for a distance, a small gap is opened between the middle mold base 31 of the first layer and the middle mold base 31 of the second layer, so as to achieve degassing of the mold cavity 4 of the middle mold base 31 of the second layer... After all the mold cavities 4 are degassed, the hydraulic press drives the top mounting platform 102 to descend, and all the mold cavities 4 are covered again, and extrusion, heating and molding are continued;

[0072] When the mold cavity 4 is deflated, the mold cavities 4 of the mold bases below are only opened slightly, which does not affect the molding process of the brake pad and is easy to operate.

[0073] The deflation action component adopts a latch-type structure, which is small in size, sensitive in action, and can be controlled by a PLC controller; the entire deflation action component has a compact structure, is heat-insulated and shock-resistant, and will not be mistakenly inserted into the plug pin hole 321 and the frame pin hole 332 when there is no PLC instruction, and has a dual protection function. The first level of protection is that the deflation action cylinder 34 adopts a magnetic cylinder. Only when the magnetic switch detects that the latch 36 is in a fully inserted or fully disengaged state, subsequent control actions are performed to avoid equipment operation failures; the second level of protection is the setting of a forced reset spring 39. When the deflation action cylinder 34 does not work, the forced reset spring 39 can force the latch 36 to bounce back, effectively avoiding the latch 36 from being inserted incorrectly.

[0074] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0075] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A highly efficient and environmentally friendly single-cavity mold group, characterized by: The invention comprises a base (105), a top base (100), a hydraulic press, a top slide (101), a top die assembly (1), a bottom die assembly (2) and a plurality of middle die assemblies (3); the upper end surface of the base (105) is fixedly connected to the top base (100) via fixed columns (103); a hydraulic press is installed on the top base (100); a telescopic end of the hydraulic press is fixedly connected to the upper end surface of the top slide (101); the top slide (101) is slidably mounted on the fixed columns (103) on all sides; a top mounting platform (102) is fixedly mounted on the lower end surface of the top slide (101); and a bottom mounting platform (104) is fixedly mounted on the upper end surface of the base (105); The top mold assembly (1) comprises a top mold base (11) fixedly mounted on the lower end surface of the top mounting platform (102); the bottom mold assembly (2) comprises a bottom mold base (21) fixedly mounted on the upper end surface of the bottom mounting platform (104); The middle mold assembly (3) is arranged between the top mold assembly (1) and the bottom mold assembly (2), and the middle mold assembly (3) comprises a middle mold base (31); A die base guide rod (106) is fixedly installed around the top die base (11), and the lower end of the die base guide rod (106) passes through each middle die base (31) and the bottom die base (21) in sequence and extends into the guide rod cavity in the base (105); The upper end surfaces of the middle mold base (31) and the bottom mold base (21) are both provided with a plurality of mold cavities (4), the lower end surfaces of the top mold base (11) and the middle mold base (31) are both provided with a plurality of mold heads (6) for inserting into the mold cavities (4), the inside of the middle mold base (31) and the bottom mold base (21) is provided with a cylinder groove corresponding to each mold cavity (4), an ejection piston (5) is movably installed in the cylinder groove, and a top of the ejection piston (5) is extended with an ejector rod (51) for extending into the mold cavity (4); The deflation action assembly also includes a deflation action assembly, which includes a deflation plug plate (32), a U-shaped frame plate (33) and a deflation action cylinder (34). The lower ends of the left and right side walls of the top mold base (11) and the middle mold base (31) are fixedly connected to the deflation plug plate (32) by bolts. The lower end of the deflation plug plate (32) is provided with a plug plate pin hole (321). The upper ends of the left and right side walls of the middle mold base (31) are fixedly connected to the U-shaped frame plate (33) by bolts. A vertical insertion cavity (331) for inserting the deflation plug plate (32) is formed between the U-shaped frame plate (33) and the side wall of the middle mold base (31). The U-shaped frame plate (33) is also provided with a frame plate pin hole (332) corresponding to the plug plate pin hole (321). The outer wall of the U-shaped frame plate (33) is fixedly connected to a deflation cylinder (34) via a plurality of frame plate guide rods (35), and a plug pin (36) for simultaneously inserting into the plug plate pin hole (321) and the frame plate pin hole (332) is installed at the telescopic end of the deflation cylinder (34).

2. According to claim 1, a high-efficiency and environmentally friendly single-cavity mold group, characterized in that: An upper retraction air cavity and a lower ejection air cavity are formed between the cylinder groove and the ejection piston (5); a retraction air path channel (52) and an ejection air path channel (53) are also provided inside the middle mold base (31) and the bottom mold base (21); the retraction air path channel (52) is communicated with each retraction air cavity, and the ejection air path channel (53) is communicated with each ejection air cavity.

3. According to claim 2, a high-efficiency and environmentally friendly single-cavity mold group, characterized in that: The outer end of the mold cavity (4) is provided with a mold cavity opening, and the lower end surfaces of the top mold base (11) and the middle mold base (31) are fixedly mounted with an opening baffle (7) for covering and sealing the mold cavity opening.

4. The high-efficiency and environmentally friendly single-cavity mold group according to claim 3 is characterized by: The top die base (11) and the middle die base (31) are fixedly connected to the top of the opening baffle (7) via vertical baffle screws (71); the opening baffle (7) is fixedly connected to the outer wall of the die head (6) via transverse die head screws (72); a fixed pressure strip (61) is embedded in the side wall of the die head (6) away from the opening baffle (7); the fixed pressure strip (61) is fixedly connected to the lower end surfaces of the top die base (11) and the middle die base (31) via pressure strip screws.

5. The high-efficiency and environmentally friendly single-cavity mold group according to claim 1 is characterized in that: The middle mold base (31) and the bottom mold base (21) are provided with heating tube insertion holes (41) at the bottoms of the respective mold cavities (4), and heating tubes are inserted into the heating tube insertion holes (41).

6. The high-efficiency and environmentally friendly single-cavity mold group according to claim 1 is characterized by: It also includes a deflation disc (37), the outer end surface of the deflation disc (37) is fixedly connected to the telescopic end of the deflation action cylinder (34), and the inner end surface of the deflation disc (37) is fixedly connected to the latch (36) via a disc spring (38); The circumference of the degassing disc (37) is slidably mounted on the corresponding frame plate guide rod (35), and the frame plate guide rod (35) is also mounted with a forced return spring (39), one end of the forced return spring (39) is in contact with the U-shaped frame plate (33), and the other end of the forced return spring (39) is in contact with the end surface of the degassing disc (37).

7. The high-efficiency and environmentally friendly single-cavity mold group according to claim 6, characterized in that: The deflation cylinder (34) is a magnetic cylinder.

8. The high-efficiency and environmentally friendly single-cavity mold group according to claim 1 is characterized by: Pull rods (8) for pulling and lifting the lower middle mold base (31) are fixedly installed around the top mold base (11), and pull rods (8) for pulling and lifting the lower middle mold base (31) are also fixedly installed around the middle mold base (31).

9. The high-efficiency and environmentally friendly single-cavity mold group according to claim 1, characterized in that: A heat insulation board (107) is provided between the lower end surface of the top slide seat (101) and the top mounting platform (102), and a heat insulation board (107) is also provided between the upper end surface of the base (105) and the bottom mounting platform (104); The upper end surfaces of the middle mold base (31) and the bottom mold base (21) are distributed and fixed with limit blocks (9), and the inner side walls of the limit blocks (9) are fixed with limit pads (91) for contacting the outer side walls of the opening baffle (7).

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