An injection mold base facilitating rapid demolding and its demolding method

Abstract

The present invention provides an injection mold base that facilitates rapid demolding, including a bottom plate fixed on the workbench surface and a top plate fixed on the lifting frame. The bottom plate and the top plate are respectively provided with a lower template and an upper template. A plurality of mold cavities are provided on both the lower template and the upper template. Side plates are respectively provided on both sides of the bottom plate and the lower template. A horizontal shaft is provided between the side plates and is close to the rear side of the lower template. A plurality of rotating grooves penetrated by the horizontal shaft are formed on the lower template. Each rotating groove is rotatably connected with a transfer member embedded in the lower template. Each transfer member is connected with a mold core located in each mold cavity. A clamping groove is provided on the side plate and is close to the front side of the lower template. A functional shaft is provided in the clamping groove. The ends of a plurality of the mold cores are inserted into and fixedly connected to the functional shaft. The mold core includes an inner-section core, a plurality of telescopic cores, and an outer-section core that are connected in sequence.

Description

Technical Field

[0001] The present invention relates to the technical field of die sets and molds, and particularly relates to an injection mold set facilitating rapid demolding and a demolding method thereof. Background Art

[0002] The structure of a rubber expansion pipe is as Figure 1 shown, being a corrugated pipe and a flexible pipe. It is used in fields such as industrial washing machines, oil discharge, and ship drainage. When producing the rubber expansion pipe, the rubber is injection molded, and the rubber compound is directly injected into the mold of the die set from the unit, which has the characteristic of a short molding cycle. A mold core is also arranged in the mold of the die set, and the rubber compound is injected between the mold and the mold core to make it molded.

[0003] However, although the molding cycle is short, demolding is time-consuming and laborious. Because the mold core is also corrugated, its connection with the rubber expansion pipe is very tight, and it is very difficult to directly pull it out by brute force. The currently common demolding method is to first tear open a gap between the rubber expansion pipe and the mold core from the end of the rubber expansion pipe, and then blow air into the gap by means of a high-pressure air gun to expand the gap. Then the worker pulls the rubber expansion pipe outwards to separate the outermost part of the rubber expansion pipe from the mold core, and then blows air into the gap by means of a high-pressure air gun again, so that the rubber expansion pipe can be demolded little by little. Summary of the Invention

[0004] The technical problem to be solved by the present invention is how to rapidly demold, and to provide an injection mold set facilitating rapid demolding and a demolding method thereof.

[0005] One technical solution of the present invention is an injection mold base facilitating quick demolding, which includes a bottom plate fixed on a workbench surface and a top plate fixed on a lifting frame. The bottom plate and the top plate are respectively provided with a lower template and an upper template. A plurality of mold cavities are provided on both the lower template and the upper template. Side plates are respectively provided on both sides of the bottom plate and the lower template. A cross shaft close to the rear side of the lower template is provided between the side plates. A plurality of rotating grooves penetrated by the cross shaft are formed on the lower template. A rotating member embedded in the lower template is rotatably connected in each rotating groove. A mold core located in each mold cavity is connected to each rotating member. A clamping groove close to the front side of the lower template is provided on the side plate. A functional shaft is provided in the clamping groove. The ends of a plurality of mold cores are inserted into and fixedly connected to the functional shaft. The mold core includes an inner core segment, a plurality of telescopic cores, and an outer core segment connected in sequence. The inner core segment is connected to the rotating member, and the outer core segment is connected to the functional shaft. An air inlet channel is formed at the center line of the outer core segment. An air inlet interface connecting the air inlet channel is formed on the functional shaft. Two annular corrugated protrusions are provided on the circumferential surface of the telescopic core. A plugging groove is formed on the side of the telescopic core facing the outer core segment. An annular protrusion is provided at the notch of the plugging groove. A plurality of terminal air holes connecting the plugging groove are formed on the annular protrusion. A plugging column is provided on the side of the telescopic core facing the inner core segment. An assembly groove extending towards the plugging groove is formed at the center line of the plugging column. An assembly column with one end blocked, hollow in the middle and the hollow part connected to the assembly groove is provided at the bottom of the assembly groove. An air inlet hole is provided at the assembly column close to its sealing plate. An inner end air hole along the radial direction of the plugging column and connecting the assembly groove is also formed on the plugging column. A perforated annular edge corresponding to the annular protrusion is provided at the end edge of the plugging column. When a plurality of telescopic cores are assembled together, the plugging column of one telescopic core is inserted into the plugging groove of an adjacent another telescopic core, and the assembly groove of one telescopic core is for the assembly column of another telescopic core to insert. And a spring cavity for spring installation is formed between the plugging column and the plugging groove. An outer segment air hole connecting the air inlet channel and the plugging groove of the outermost telescopic core is provided in the outer core segment. An inner segment column for the assembly groove of the innermost telescopic core to insert is provided in the inner core segment. A first fastening buckle fitting its contour surface is detachably connected to each outer core segment. A second fastening buckle fitting its contour surface is detachably connected to each inner core segment.

[0006] As an implementation manner, two annular corrugated protrusions are provided on the circumferential surface of the inner core segment. The second fastening buckle is detachably connected between the two annular corrugated protrusions of the inner core segment.

[0007] As an implementation manner, the inner core segment is fixedly connected to the innermost telescopic core.

[0008] As an implementation manner, an inner insertion slot having the same shape as the insertion slot is formed on one side of the inner segment core facing the telescopic core. The inner segment column is disposed in the inner insertion slot. An inner annular protrusion having the same shape as the annular protrusion is provided at the notch of the inner insertion slot. A plurality of inner terminal air holes connecting the inner insertion slot are formed on the inner annular protrusion. When the inner segment core and the innermost telescopic core are assembled together, the insertion column of the innermost telescopic core is inserted into the inner insertion slot, and the assembly slot of the innermost telescopic core allows the inner segment column to be inserted. An inner spring cavity for installing a spring is formed between the inner insertion slot and the insertion column of the innermost telescopic core.

[0009] As an implementation manner, two ring-shaped corrugated protrusions are provided on the circumferential surface of the outer segment core, and the first fastening buckle is detachably connected between the two ring-shaped corrugated protrusions of the outer segment core.

[0010] As an implementation manner, a retraction groove is formed on one side of the functional shaft connecting each die core, and a tension spring groove connecting the retraction groove is further formed in the functional shaft. The first fastening buckle is received in the retraction groove through a tension spring disposed in the tension spring groove.

[0011] As an implementation manner, an outer insertion column having the same shape as the insertion column is formed on one side of the outer segment core facing the telescopic core. The air inlet passage penetrates through the outer insertion column along the center line of the outer insertion column. The outer segment air holes are formed on the outer insertion column along the radial direction of the outer insertion column. An outer annular edge having the same shape as the perforated annular edge is provided at the end edge of the outer insertion column. When the outer segment core and the outermost telescopic core are assembled together, the outer insertion column is inserted into the insertion slot of the outermost telescopic core, and the air inlet passage allows the assembly column of the outermost telescopic core to be inserted. An outer spring cavity for installing a spring is formed between the outer insertion column and the insertion slot.

[0012] As an implementation manner, one end of the spring abuts against the annular protrusion, and the other end abuts against the perforated annular edge.

[0013] Another technical solution of the present invention is a demolding method, including a mold opening step: separating the top plate, the upper template, the bottom plate, and the lower template; a fastening step: buckling the first fastening buckle and the second fastening buckle at both ends of the rubber expansion tube respectively, so that both ends are buckled on the outer core and the inner core respectively; a blowing step: driving the functional shaft to turn the middle transfer members and the mold cores upward around the horizontal axis, then accessing a gas source from the air inlet interface, and after blowing, making several expansion cores of each mold core extend section by section, and forming bulges at various positions where the rubber expansion tube is connected between adjacent expansion cores; a stretching step: pushing and pulling the functional shaft along the axial direction of each mold core to expand the bulges between the rubber expansion tube and the mold core until the bulges are connected to each other; a demolding step: after removing the first fastening buckle and the second fastening buckle, peeling the rubber expansion tube from the mold core.

[0014] The beneficial effect of the present invention compared with the prior art is that by simultaneously accessing a high-pressure gas source to several air inlet interfaces, the gas enters the outer core along the air inlet channel, and then enters the outer spring cavity along the outer air holes. The outer core separates from the connected expansion core outward due to the high-pressure gas in the outer spring cavity. During the separation process, the terminal air holes are exposed, so the high-pressure gas enters the inside of the rubber expansion tube along the gap between the outer core and the expansion core, and the internal space of the rubber expansion tube expands as the outer core and the expansion core separate. And as the outer core and the expansion core separate, the air inlet holes are also exposed, so the high-pressure gas also enters the assembly groove of the expansion core along the air inlet holes, and then enters the spring cavity along the inner end air holes. The outermost expansion core separates from the other connected expansion core outward due to the high-pressure gas in the spring cavity. During the separation process, the terminal air holes of the other expansion core are exposed, so the high-pressure gas enters the inside of the rubber expansion tube along the gap between the two expansion cores, and the internal space of the rubber expansion tube expands as the two expansion cores separate. Thus, each expansion core from the outside to the inside extends outward one by one, and at the same time, the rubber expansion tube is inflated and bulged everywhere inside, and after inflation, the functional shaft is pushed and pulled back and forth along the axial direction of each mold core to compress and stretch each expansion core. This process further inflates the inside of the rubber expansion tube and increases the separation force between the rubber expansion tube and the corrugated protrusions on the surface of the expansion core. And with the back-and-forth pushing and pulling action, it can synchronously prompt the rubber expansion tube connected to each corrugated protrusion to separate from it. The above process can achieve faster and more efficient demolding. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the rubber expansion tube mentioned in the background art;

[0016] Figure 2 It is a schematic structural diagram of the inner side view of the injection mold base provided by the embodiment of the present invention, which is convenient for rapid demolding;

[0017] Figure 3 The structural schematic diagram of the outer side view of the injection mold base facilitating quick demolding provided by the embodiment of the present invention;

[0018] Figure 4 The sectional view of the mold core provided by the embodiment of the present invention;

[0019] Figure 5 is Figure 4 The partial enlarged view of the connection of two telescopic cores of the mold core provided in [[ ]];

[0020] Figure 6 is Figure 4 The partial enlarged view of the connection between the inner section core and the telescopic core of the mold core provided in [[ ]];

[0021] Figure 7 is Figure 4 The partial enlarged view of the connection between the outer section core and the telescopic core of the mold core provided in [[ ]].

[0022] In the figure: 1, bottom plate; 2, top plate; 3, lower template; 4, upper template; 5, mold cavity; 6, side plate; 7, horizontal axis; 8, rotating groove; 9, intermediate rotating part; 10, mold core; 11, clamping groove; 12, functional axis; 13, inner section core; 14, telescopic core; 15, outer section core; 16, air inlet channel; 17, air inlet interface; 18, corrugated protrusion; 19, insertion slot; 20, annular protrusion; 21, terminal air hole; 22, insertion post; 23, assembly groove; 24, hollow part; 25, assembly post; 26, sealing plate part; 27, air inlet hole; 28, inner end air hole; 29, perforated annular edge; 30, spring; 31, spring cavity; 32, outer section air hole; 33, inner section post; 34, first fastening buckle; 35, second fastening buckle; 36, inner insertion slot; 37, inner annular protrusion; 38, inner terminal air hole; 39, inner spring cavity; 40, retracting groove; 41, tension spring groove; 42, tension spring; 43, outer insertion post; 44, outer annular edge; 45, outer spring cavity. Specific embodiments

[0023] The above and other embodiments and advantages of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only partial embodiments of the present invention, rather than all embodiments.

[0024] In one embodiment, as Figures 2-5 shown.

[0025] The injection mold base provided by this embodiment, which is convenient for rapid demolding, includes a bottom plate 1 fixed on the workbench surface and a top plate 2 fixed on the lifting frame. Lower templates 3 and upper templates 4 are respectively provided on the bottom plate 1 and the top plate 2. A number of mold cavities 5 are provided on both the lower templates 3 and the upper templates 4. Side plates 6 are respectively provided on both sides of the bottom plate 1 and the lower templates 3. A transverse shaft 7 close to the rear side of the lower template 3 is provided between the side plates 6. A number of rotating grooves 8 penetrated by the transverse shaft 7 are opened on the lower template 3. A rotating member 9 embedded in the lower template 3 is rotatably connected in each rotating groove 8. A mold core 10 located in each mold cavity 5 is connected to each rotating member 9. A clamping groove 11 close to the front side of the lower template 3 is provided on the side plate 6. A functional shaft 12 is provided in the clamping groove 11. The ends of a number of mold cores 10 are inserted into and fixedly connected to the functional shaft 12. The mold core 10 includes an inner section core 13, a number of telescopic cores 14, and an outer section core 15 connected in sequence. The inner section core 13 is connected to the rotating member 9, and the outer section core 15 is connected to the functional shaft 12. An air inlet channel 16 is opened at the center line of the outer section core 15. An air inlet interface 17 connecting the air inlet channel 16 is opened on the functional shaft 12. Two ring-shaped corrugated protrusions 18 are provided on the circumferential surface of the telescopic core 14. A plugging groove 19 is opened on the side of the telescopic core 14 facing the outer section core 15. A ring-shaped protrusion 20 is provided at the notch of the plugging groove 19. A number of terminal air holes 21 connecting the plugging groove 19 are opened on the ring-shaped protrusion 20. A plugging column 22 is provided on the side of the telescopic core 14 facing the inner section core 13. An assembly groove 23 extending towards the plugging groove 19 is opened at the center line of the plugging column 22. An assembly column 25 with one end blocked, hollow in the middle and the hollow part 24 connected to the assembly groove 23 is provided at the bottom of the assembly groove 23. An air inlet hole 27 is provided at the position 26 of the assembly column 25 close to its sealing plate. An inner end air hole 28 along its radial direction and connecting the assembly groove 23 is also opened on the plugging column 22. A perforated ring-shaped edge 29 corresponding to the ring-shaped protrusion 20 is provided at the end edge of the plugging column 22. When a number of telescopic cores 14 are assembled together, the plugging column 22 of one telescopic core 14 is inserted into the plugging groove 19 of an adjacent telescopic core 14, and the assembly groove 23 of one telescopic core 14 is for the assembly column 25 of another telescopic core 14 to be inserted. And a spring cavity 31 for installing a spring 30 is formed between the plugging column 22 and the plugging groove 19. An outer section air hole 32 connecting the air inlet channel 16 and the plugging groove 19 of the outermost telescopic core 14 is provided in the outer section core 15. An inner section column 33 for the assembly groove 23 of the innermost telescopic core 14 to be inserted is provided in the inner section core 13. A first fastening buckle 34 fitting its contour surface is detachably connected to each outer section core 15. A second fastening buckle 35 fitting its contour surface is detachably connected to each inner section core 13.

[0026] In this embodiment, an injection mold base facilitating rapid demolding is provided to solve the problem that the traditional demolding method of rubber expansion pipes is time-consuming and laborious. Since traditional demolding requires workers to blow air into the rubber expansion pipe while pulling the rubber expansion pipe outwards, and the demolding process is carried out one ring of corrugated protrusions after another. In this embodiment, by simultaneously connecting a high-pressure gas source to a plurality of air inlet interfaces 17, the gas enters the outer core 15 along the air inlet passage 16, and then enters the outer spring cavity 45 along the outer air holes 32. The outer core 15 separates from the connected expansion core 14 outwards due to the high-pressure gas in the outer spring cavity 45. In this embodiment, the side close to the worker's operation side is the outer side, and the side far from the worker's operation side is the inner side. During the separation process, the terminal air holes 21 are exposed, so the high-pressure gas enters the inside of the rubber expansion pipe along the gap between the outer core 15 and the expansion core 14, and the internal space of the rubber expansion pipe expands as the outer core 15 and the expansion core 14 separate. And as the outer core 15 and the expansion core 14 separate, the air inlet holes 27 are also exposed, so the high-pressure gas also enters the assembly groove 23 of the expansion core 14 along the air inlet holes 27, and then enters the spring cavity 31 along the inner end air holes 28. The outermost expansion core 14 separates from the other connected expansion core 14 outwards due to the high-pressure gas in the spring cavity 31. During the separation process, the terminal air holes 21 of the other expansion core 14 are exposed, so the high-pressure gas enters the inside of the rubber expansion pipe along the gap between the two expansion cores 14, and the internal space of the rubber expansion pipe expands as the two expansion cores 14 separate. Thus, each expansion core 14 extends outwards one by one from the outside to the inside, and at the same time, air inflation bulges are formed everywhere inside the rubber expansion pipe. After inflation, the functional shaft 12 is reciprocally pushed and pulled along the axial direction of each mold core 10 to compress and stretch each expansion core 14. This process further inflates the inside of the rubber expansion pipe and increases the separation force between the corrugated protrusions 18 on the surface of the rubber expansion pipe and the expansion core 14. And with the reciprocating push and pull action, it can synchronously prompt the rubber expansion pipe connected to each corrugated protrusion 18 to separate from it. Of course, in this process, the first fastening buckle 34 and the second fastening buckle 35 are connected to the outer core 15 and the inner core 13 to reduce the gas from escaping from both ends of the rubber expansion pipe. The above process can achieve faster and more efficient demolding.

[0027] In one embodiment, as Figures 2-3 shown.

[0028] For the injection mold base facilitating rapid demolding provided in this embodiment, two rings of corrugated protrusions 18 are provided on the circumferential surface of the inner core 13, and the second fastening buckle 35 is detachably connected between the two rings of corrugated protrusions 18 of the inner core 13.

[0029] In this embodiment, by providing two rings of corrugated protrusions 18 on the circumferential surface of the inner core 13 and buckling the second fastening buckle 35 between the two rings of corrugated protrusions 18 of the inner core 13, the connection can be made more firm.

[0030] In one embodiment, the inner core 13 and the innermost telescopic core 14 of the injection mold base facilitating quick demolding are fixedly connected.

[0031] In one embodiment, another connection method corresponding to the fixed connection is as Figure 6 shown. On the side of the inner core 13 of the injection mold base facilitating quick demolding facing the telescopic core 14, an inner insertion slot 36 having the same shape as the insertion slot 19 is provided. The inner column 33 is disposed in the inner insertion slot 36. At the notch of the inner insertion slot 36, an inner annular protrusion 37 having the same shape as the annular protrusion 20 is provided. A plurality of inner terminal air holes 38 connecting the inner insertion slot 36 are formed on the inner annular protrusion 37. When the inner core 13 and the innermost telescopic core 14 are assembled together, the insertion column 22 of the innermost telescopic core 14 is inserted into the inner insertion slot 36, and the assembly slot 23 of the innermost telescopic core 14 is for the inner column 33 to be inserted. And an inner spring cavity 39 for installing the spring 30 is formed between the inner insertion slot 36 and the insertion column of the innermost telescopic core 14.

[0032] In this embodiment, the connection structure between the inner core 13 and the telescopic core 14 follows the connection structure between the telescopic cores 14. Among them, the spring 30 plays a role in limiting the outward extension of the telescopic core 14 relative to the inner core 13.

[0033] In one embodiment, as Figures 2-3 shown.

[0034] For the injection mold base facilitating quick demolding provided in this embodiment, two annular corrugated protrusions 18 are provided on the circumferential surface of the outer core 15, and the first fastening buckle 34 is detachably connected between the two annular corrugated protrusions 18 of the outer core 15.

[0035] In this embodiment, by providing two annular corrugated protrusions 18 on the circumferential surface of the outer core 15 and buckling the first fastening buckle 34 between the two annular corrugated protrusions 18 of the outer core 15, the connection can be made more firm.

[0036] In one embodiment, as Figure 2 shown.

[0037] For the injection mold base facilitating quick demolding provided in this embodiment, a retraction groove 40 is provided on one side of the functional shaft 12 connecting each mold core 10. A tension spring groove 41 connecting the retraction groove 40 is further provided in the functional shaft 12. The first fastening buckle 34 is received in the retraction groove 40 through a tension spring 42 provided in the tension spring groove 41.

[0038] In this embodiment, when the first fastening buckle 34 is not used, the first fastening buckle 34 is received in the draw groove 40 by the action of the tension spring 42, and the contour of the draw groove 40 is set to match the first fastening buckle 34. When the first fastening buckle 34 is used, the first fastening buckle 34 can be pulled outward and then buckled between the two ring corrugated protrusions 18 of the outer core 15.

[0039] In one embodiment, if Figure 7 shown.

[0040] The injection mold frame provided in this embodiment is convenient for rapid demolding, and an outer plug-in column 43 of the same shape as the plug-in column 22 is provided on the side of the outer core 15 facing the telescopic core 14, and an air inlet 16 penetrates the outer plug-in column 43 along the center line of the outer plug-in column 43, and an outer section air hole 32 is provided on the outer plug-in column 43 along the radial direction of the outer plug-in column 43, and an outer annular edge 44 of the same shape as the annular edge with hole 29 is provided on the end edge of the outer plug-in column 43, and when the outer core 15 and the outermost telescopic core 14 are assembled at one place, the outer plug-in column 43 is inserted into the plug-in groove 19 of the outermost telescopic core 14, and the air inlet 16 is inserted into the assembly column 25 of the outermost telescopic core 14, and an outer spring cavity 45 for installing the spring 30 is formed between the outer plug-in column 43 and the plug-in groove 19.

[0041] In this embodiment, the outer annular edge 44 is perforated like the perforated annular edge 29 , and gas can pass through the outer annular edge 44 when the outer segment core 15 and the telescopic core 14 are separated.

[0042] Based on the above-mentioned injection mold frame that is easy to demold quickly, the following demolding method can be implemented, including a mold opening step: separating the top plate, the upper mold plate and the bottom plate, the lower mold plate; a fastening step: buckling the first fastening buckle and the second fastening buckle on the two ends of the rubber telescopic tube respectively, so that the two ends are fastened to the outer core and the inner core respectively; a blowing step: driving the functional shaft to turn each transfer part and each mold core upward around the horizontal axis, and then connecting the air source from the air inlet interface, and after blowing, the several telescopic cores of each mold core are extended section by section, and bulges are formed at each place where the rubber telescopic tube is connected between adjacent telescopic cores; a stretching step: pushing and pulling the functional shaft along the axial direction of each mold core to expand the bulge between the rubber telescopic tube and the mold core until the bulges are connected; a demolding step: after removing the first fastening buckle and the second fastening buckle, the rubber telescopic tube is peeled off the mold core.

[0043] In this embodiment, the main working principle is as follows: by simultaneously connecting a high-pressure gas source to a number of air inlet interfaces 17, the gas flows along the air inlet passage 16 into the outer core 15, and then enters the outer spring chamber 45 along the outer holes 32. The outer core 15 separates from the connected telescopic core 14 outward due to the high-pressure gas in the outer spring chamber 45. During the separation process, the terminal holes 21 are exposed, so the high-pressure gas enters the inside of the rubber telescopic tube along the gap between the outer core 15 and the telescopic core 14, and the internal space of the rubber telescopic tube expands as the outer core 15 and the telescopic core 14 separate. And as the outer core 15 and the telescopic core 14 separate, the air inlet holes 27 are also exposed, so the high-pressure gas also enters the assembly groove 23 of the telescopic core 14 along the air inlet holes 27, and then enters the spring chamber 31 along the inner end holes 28. The outermost telescopic core 14 separates from another connected telescopic core 14 outward due to the high-pressure gas in the spring chamber 31. During the separation process, the terminal holes 21 of the other telescopic core 14 are exposed, so the high-pressure gas enters the inside of the rubber telescopic tube along the gap between the two telescopic cores 14, and the internal space of the rubber telescopic tube expands as the two telescopic cores 14 separate. Thus, each telescopic core 14 extends outward from the outside to the inside one by one, and at the same time, the rubber telescopic tube is inflated and bulged everywhere inside. After inflation, the functional shaft 12 is reciprocally pushed and pulled along the axial direction of each die core 10 to compress and stretch each telescopic core 14. During this process, the rubber telescopic tube is further inflated, increasing the force to separate the rubber telescopic tube from the corrugated protrusions 18 on the surface of the telescopic core 14. And with the reciprocating push and pull action, it can synchronously cause the rubber telescopic tube connected to each corrugated protrusion 18 to separate from it. Of course, during this process, the first fastening buckle 34 and the second fastening buckle 35 are connected to the outer core 15 and the inner core 13 to reduce the gas from escaping from both ends of the rubber telescopic tube. The above process can achieve faster and more efficient demolding.

[0044] The specific embodiments described above further elaborate on the invention purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. In particular, it is pointed out that for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An injection mold base facilitating quick demolding, comprising a bottom plate (1) fixed on a workbench surface and a top plate (2) fixed on a lifting frame. A lower template (3) and an upper template (4) are respectively arranged on the bottom plate (1) and the top plate (2). A plurality of mold cavities (5) are arranged on both the lower template (3) and the upper template (4). It is characterized in that, On both sides of the bottom plate (1) and the lower template (3), side plates (6) are respectively provided. A transverse shaft (7) near the rear side of the lower template (3) is provided between the side plates (6). A plurality of rotating grooves (8) penetrated by the transverse shaft (7) are formed on the lower template (3). A rotating member (9) embedded in the lower template (3) is rotatably connected in each rotating groove (8). A mold core (10) located in each mold groove (5) is connected to each rotating member (9). A clamping groove (11) near the front side of the lower template (3) is provided on the side plate (6). A functional shaft (12) is provided in the clamping groove (11). The ends of a plurality of mold cores (10) are inserted into and fixedly connected to the functional shaft (12). The mold core (10) includes an inner section core (13), a plurality of telescopic cores (14), and an outer section core (15) connected in sequence. The inner section core (13) is connected to the rotating member (9). The outer section core (15) is connected to the functional shaft (12). An air inlet channel (16) is formed at the center line of the outer section core (15). An air inlet interface (17) connecting the air inlet channel (16) is formed on the functional shaft (12). Two ring-shaped corrugated protrusions (18) are provided on the circumferential surface of the telescopic core (14). A plugging groove (19) is formed on the side of the telescopic core (14) facing the outer section core (15). A ring-shaped protrusion (20) is provided at the notch of the plugging groove (19). A plurality of terminal air holes (21) connecting the plugging groove (19) are formed on the ring-shaped protrusion (20). A plugging column (22) is provided on the side of the telescopic core (14) facing the inner section core (13). An assembly groove (23) extending towards the plugging groove (19) is formed at the center line of the plugging column (22). An assembly column (25) with one end blocked, hollow in the middle and the hollow part (24) connected to the assembly groove (23) is provided at the bottom of the assembly groove (23). An air inlet hole (27) is provided near the sealing plate (26) of the assembly column (25). An inner end air hole (28) along its radial direction and connecting the assembly groove (23) is further formed on the plugging column (22). A perforated ring-shaped edge (29) corresponding to the ring-shaped protrusion (20) is provided at the end edge of the plugging column (22). When a plurality of telescopic cores (14) are assembled together, the plugging column (22) of one telescopic core (14) is inserted into the plugging groove (19) of an adjacent another telescopic core (14), and the assembly groove (23) of one telescopic core (14) is for the assembly column (25) of another telescopic core (14) to be inserted, and a spring cavity (31) for installing a spring (30) is formed between the plugging column (22) and the plugging groove (19). An outer section air hole (32) connecting the air inlet channel (16) and the plugging groove (19) of the outermost telescopic core (14) is provided in the outer section core (15). An inner section column (33) for the assembly groove (23) of the innermost telescopic core (14) to be inserted is provided in the inner section core (13).A first fastening buckle (34) that fits the contour surface thereof is detachably connected to each of the outer segment cores (15), and a second fastening buckle (35) that fits the contour surface thereof is detachably connected to each of the inner segment cores (13).

2. The injection mold base facilitating quick demolding according to claim 1, wherein The circumferential surface of the inner segment core (13) is provided with two annular corrugated protrusions (18), and the second fastening buckle (35) is detachably connected between the two annular corrugated protrusions (18) of the inner segment core (13).

3. The injection mold base facilitating quick demolding according to claim 2, wherein The inner segment core (13) and the innermost telescopic core (14) are fixedly connected.

4. The injection mold base facilitating quick demolding according to claim 2, wherein, On the side of the inner segment core (13) facing the telescopic core (14), an inner insertion slot (36) having the same shape as the insertion slot (19) is formed. The inner segment column (33) is arranged in the inner insertion slot (36). At the notch of the inner insertion slot (36), an inner annular protrusion (37) having the same shape as the annular protrusion (20) is provided. A plurality of inner terminal air holes (38) connecting the inner insertion slot (36) are formed on the inner annular protrusion (37). When the inner segment core (13) and the innermost telescopic core (14) are assembled together, the insertion column (22) of the innermost telescopic core (14) is inserted into the inner insertion slot (36), and the assembly slot (23) of the innermost telescopic core (14) is for the inner segment column (33) to be inserted. And an inner spring cavity (39) for installing the spring (30) is formed between the inner insertion slot (36) and the insertion column of the innermost telescopic core (14).

5. The injection mold base facilitating quick demolding according to claim 1, wherein, The circumferential surface of the outer segment core (15) is provided with two annular corrugated protrusions (18), and the first fastening buckle (34) is detachably connected between the two annular corrugated protrusions (18) of the outer segment core (15).

6. The injection mold base facilitating quick demolding according to claim 5, wherein, On the side of the functional shaft (12) connecting each die core (10), a retracting groove (40) is formed. A tension spring groove (41) connecting the retracting groove (40) is also formed in the functional shaft (12). The first fastening buckle (34) is received in the retracting groove (40) through a tension spring (42) arranged in the tension spring groove (41).

7. The injection mold base for facilitating quick demolding according to claim 5, characterized in that, On the side of the outer segment core (15) facing the telescopic core (14), an outer insertion column (43) having the same shape as the insertion column (22) is formed. The air inlet channel (16) penetrates the outer insertion column (43) along the center line of the outer insertion column (43). The outer segment air holes (32) are radially formed on the outer insertion column (43). At the end edge of the outer insertion column (43), an outer annular edge (44) having the same shape as the perforated annular edge (29) is provided. When the outer segment core (15) and the outermost telescopic core (14) are assembled together, the outer insertion column (43) is inserted into the insertion slot (19) of the outermost telescopic core (14), and the air inlet channel (16) is for the assembly column (25) of the outermost telescopic core (14) to be inserted. And an outer spring cavity (45) for installing the spring (30) is formed between the outer insertion column (43) and the insertion slot (19).

8. The injection mold base for facilitating quick demolding according to claim 1, wherein One end of the spring (30) abuts against the annular protrusion (20), and the other end abuts against the perforated annular edge (29).

9. A demolding method, characterized in that, Using the injection mold base for facilitating quick demolding according to any one of claims 1-8, comprising Mold opening step: separate the top plate, the upper template, the bottom plate, and the lower template; Fastening step: fasten the first fastening buckle and the second fastening buckle to both ends of the rubber expansion tube respectively, so that both ends are fastened to the outer core and the inner core respectively; Blowing step: drive the functional shaft to turn each of the intermediate members and each of the mold cores upward around the horizontal axis, then connect a gas source from the air inlet interface, and after blowing, make several telescopic cores of each mold core extend section by section, and form bulges at various places where the rubber expansion tube is connected between adjacent telescopic cores; Stretching step: push and pull the functional shaft along the axial direction of each mold core to expand the bulges between the rubber expansion tube and the mold core until the bulges are connected to each other; Demolding step: after removing the first fastening buckle and the second fastening buckle, peel the rubber expansion tube from the mold core.

Images