Injection mold with product cavity convenient to replace

Abstract

The utility model discloses an injection mold convenient for replacing a product cavity, which comprises a fixed mold and a movable mold, and further comprises a cavity replacing mechanism, a first clamping block and a second clamping block, and the movable mold comprises a movable mold front plate, a movable mold rear plate and a cavity mold core; the cavity mold core is detachably embedded in the movable mold front plate through the first clamping block and the second clamping block; a cavity changing mechanism is elastically mounted in the movable mold rear plate; a sliding ejector rod, a rotating push rod and a push plate are arranged in the cavity changing mechanism corresponding to the cavity mold core, the first clamping block and the second clamping block in a one-to-one correspondence manner; the ends, close to the movable mold front plate, of the sliding ejector rod and the push plate abut against the corresponding cavity mold core and the second clamping block. A shifting block located between the rotating push rod and the first clamping block is rotationally installed in the movable mold rear plate, and the rotating push rod and the first clamping block abut against the two ends of the shifting block respectively. By arranging the cavity replacing mechanism, the cavity mold core, the first clamping block and the second clamping block, when the mold needs to be replaced, only the corresponding cavity mold core needs to be replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold which is convenient for replacing a product cavity. Background Art

[0002] Injection molding machines are the main molding equipment used in industrial production to inject thermoplastic materials into molds to make plastic products of various shapes. When making products, engineers make corresponding molds according to the size of the products, and then use injection molding machines to inject thermoplastic materials into the molds to form products corresponding to the shape of the mold cavity. Therefore, one set of molds corresponds to one product. However, some products have size differences, which leads to the need to design molds of different sizes corresponding to different sizes. Not only is the cost high, but different molds also need to be replaced frequently when injection molding products.

[0003] For example, the utility model patent with application number CN202220692060.4 discloses an injection mold for an injection molding machine, an injection mold for an injection molding machine, including a bottom plate, a connecting plate, a limit rod, a limit block, a bearing, a screw, a nut seat, a rotating handle, an upper mold, and a lower mold. The top surface of the bottom plate is fixedly connected to the left and right ends with a connecting plate, and the inner surface of the connecting plate is fixedly connected to the limit rod, and the surface of the limit rod is slidably connected to the limit block. This injection mold for an injection molding machine solves the problem that the existing injection molds are manually demoulded when in use, which reduces work efficiency and affects the actual use effect. By rotating the rotating handle, the rotating handle drives the screw to rotate, and the screw drives the nut seat to slide, thereby driving the screw to slide, thereby driving the nut seat to slide, and the nut seat drives the upper mold and the lower mold to slide, which is convenient for demoulding, improves work efficiency and actual use effect, and improves stability and practicality through the U-shaped block.

[0004] Although the injection molding machine uses an injection mold to drive the upper and lower molds to slide by rotating the handle to facilitate demolding, the cavity of the mold is fixed, so the mold can only produce this kind of product. When products of other sizes need to be produced, the mold needs to be disassembled and replaced, which is time-consuming and labor-intensive and leads to increased costs; further improvement is needed. Utility Model Content

[0005] The purpose of the utility model is to provide an injection mold which is easy to replace the product cavity, aiming to improve the problem that the cavity of the injection mold is fixed and can only produce this kind of product. When products of other sizes need to be produced, the mold needs to be disassembled and replaced, which is time-consuming and labor-intensive and leads to increased costs.

[0006] The utility model is implemented as follows: an injection mold for facilitating replacement of a product cavity, comprising a fixed mold and a movable mold, and also comprising a cavity changing mechanism, a first clamping block and a second clamping block, wherein the movable mold comprises a movable mold front plate, a movable mold rear plate and a cavity mold core; the cavity mold core is detachably embedded in the movable mold front plate through the first clamping block and the second clamping block; a cavity changing mechanism is elastically installed inside the movable mold rear plate, and sliding ejector rods, rotating push rods and push plates are arranged in a one-to-one correspondence with the positions of the cavity mold core, the first clamping block and the second clamping block in the cavity changing mechanism; the ends of the sliding ejector rod and the push plate close to the movable mold front plate are both in contact with the corresponding cavity mold core and the second clamping block; a toggle block located between the rotating push rod and the first clamping block is rotatably installed in the movable mold rear plate, and the rotating push rod and the first clamping block are respectively in contact with the two ends of the toggle block.

[0007] Preferably, a first mounting cavity is opened in the front plate of the movable mold, and the cavity mold core can be detachably mounted in the first mounting cavity; the first clamping block and the second clamping block are respectively clamped on opposite sides of the cavity mold core, and the first clamping block and the second clamping block are elastically mounted on the inner wall of the first mounting cavity at one end away from the cavity mold core.

[0008] Preferably, the cavity mold core is provided with a card slot on both sides thereof, and the first card block and the second card block are provided with corresponding first bevel buckles and second bevel buckles at one end close to the card slot, and the first bevel buckles and the second bevel buckles are correspondingly connected in the adjacent card slots.

[0009] Preferably, the first clamping block and the second clamping block are both fixedly mounted with a return spring at one end away from the cavity mold core, and the return spring is fixedly mounted on the inner wall of the corresponding cavity mold core.

[0010] Preferably, the cavity changing mechanism includes a pressing block and a cross bar, a second mounting cavity is provided on the rear plate of the movable mold at a position corresponding to the first mounting cavity, the cross bar is slidably installed in the second mounting cavity, and one end of the cross bar close to the second clamping block is elastically connected to the inner wall of the second mounting cavity; a pressing block is fixedly installed on the end of the cross bar close to the first clamping block, a penetrating pressing hole is provided at the position of the second mounting cavity close to the pressing block, the pressing block is slidably installed in the pressing hole, and the positions of the cross bar corresponding to the cavity mold core, the first clamping block and the second clamping block are provided with sliding push rods, rotating push rods and push plates in a one-to-one correspondence.

[0011] Preferably, a support spring is fixedly mounted on one end of the cross bar close to the second clamping block, and the support spring is fixedly mounted on the inner wall of the adjacent second mounting cavity.

[0012] Preferably, a second pressure plate is extended from one end of the second clamping block close to the push plate, and the push plate is pressed on the second pressure plate along the pushing direction of the cavity changing mechanism; a slope slide is fixedly provided at the position of the cavity mold core corresponding to the sliding push rod, and the sliding push rod slides against the slope slide.

[0013] Preferably, the toggle block includes a rotating rod, the toggle block is rotated in the second installation cavity by the rotating rod, and the rotating push rod is pressed on one end of the side of the toggle block along the pushing direction of the cavity changing mechanism; the first clamping block is extended to a side close to the rotating push rod to provide a first pressure plate, and the first pressure plate is pressed on one end of the side of the toggle block away from the rotating push rod along the pushing direction of the cavity changing mechanism.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model is provided with a cavity changing mechanism, a cavity mold core, a first clamping block and a second clamping block; the cavity mold core can be simply loaded and unloaded through the first clamping block and the second clamping block, so that when it is necessary to produce products of other sizes, it is only necessary to replace the corresponding cavity mold core without disassembling the entire mold, which is simple, trouble-free and cost-saving.

[0016] 2. The utility model provides a slope slide and a sliding ejector rod, and the sliding ejector rod gradually moves on the slope slide to automatically eject the cavity mold core, thereby facilitating the disassembly of the cavity mold core. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional internal structure schematic diagram of the utility model;

[0018] Figure 2 It is a cross-sectional structural schematic diagram of the front side of the utility model;

[0019] Figure 3 It is a schematic diagram of the installation structure of the cavity mold core of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the cavity changing mechanism of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the second installation cavity of the utility model;

[0022] Figure 6 It is a structural schematic diagram of the cavity mold core of the utility model.

[0023] In the figure: 1, fixed mold; 2, movable mold front plate; 201, first installation cavity; 3, cavity changing mechanism; 301, pressing block; 302, cross bar; 303, rotating push rod; 304, T-shaped slider; 305, sliding push rod; 306, push plate; 307, first spring; 4, movable mold back plate; 401, second installation cavity; 402, pressing hole; 403, T-shaped slide; 5, cavity mold core; 501, slot; 502, slope slide; 6, first clamping block; 601, first pressure plate; 602, first inclined buckle; 7, second clamping block; 701, second pressure plate; 702, second inclined buckle; 8, toggle block; 9, reset spring; 10, support spring. DETAILED DESCRIPTION

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0026] Example 1

[0027] like Figure 1 , Figure 2 and Figure 4 As shown, an injection mold for facilitating replacement of a product cavity comprises a fixed mold 1 and a movable mold, and also comprises a cavity changing mechanism 3, a first clamping block 6 and a second clamping block 7. The movable mold comprises a movable mold front plate 2, a movable mold rear plate 4 and a cavity mold core 5; the cavity mold core 5 is detachably embedded in the movable mold front plate 2 through the first clamping block 6 and the second clamping block 7; a first mounting cavity 201 is provided in the movable mold front plate 2, and the cavity mold core 5 is detachably mounted in the first mounting cavity 201; the first clamping block 6 and the second clamping block 7 are respectively clamped on opposite sides of the cavity mold core 5, and the first clamping block 6 and the second clamping block 7 are away from the cavity mold core 5 are elastically mounted on the inner wall of the first mounting cavity 201; the cavity mold core 5 is provided with a slot 501 on both opposite sides, and the first clamping block 6 and the second clamping block 7 are provided with corresponding first bevel buckles 602 and second bevel buckles 702 at one end close to the slot 501, and the first bevel buckles 602 and the second bevel buckles 702 are correspondingly connected in the adjacent slots 501 one by one; the first clamping block 6 and the second clamping block 7 are fixedly mounted with a return spring 9 at one end away from the cavity mold core 5, and the return spring 9 is fixedly mounted on the inner wall of the corresponding cavity mold core 5.

[0028] like Figure 1, Figure 4 and Figure 5 As shown, a cavity changing mechanism 3 is elastically installed inside the movable mold rear plate 4, and the positions of the cavity changing mechanism 3 corresponding to the mold core 5, the first clamping block 6 and the second clamping block 7 are provided with a sliding push rod 305, a rotating push rod 303 and a push plate 306 in a one-to-one correspondence; the cavity changing mechanism 3 includes a pressing block 301 and a cross bar 302, and a second installation cavity 401 is opened at a position of the movable mold rear plate 4 corresponding to the first installation cavity 201, and the cross bar 302 is slidably installed in the second installation cavity 401, and one end of the cross bar 302 close to the second clamping block 7 is elastically connected to the inner wall of the second installation cavity 401; the cross bar 30 A pressing block 301 is fixedly installed at one end close to the first clamping block 6, a penetrating pressing hole 402 is provided at a position close to the pressing block 301 in the second installation cavity 401, the pressing block 301 is slidably installed in the pressing hole 402, and a sliding push rod 305, a rotating push rod 303 and a push plate 306 are provided at positions of the cross bar 302 corresponding to the cavity mold core 5, the first clamping block 6 and the second clamping block 7; a supporting spring 10 is fixedly installed at one end of the cross bar 302 close to the second clamping block 7, and the supporting spring 10 is fixedly installed on the inner wall of the adjacent second installation cavity 401.

[0029] like Figure 1 , Figure 4 and Figure 6 As shown, the sliding push rod 305 and the push plate 306 are both in contact with the corresponding cavity mold core 5 and the second clamping block 7 at one end close to the movable mold front plate 2; the movable mold rear plate 4 is rotatably installed with a toggle block 8 located between the rotating push rod 303 and the first clamping block 6, and the rotating push rod 303 and the first clamping block 6 are respectively abutted at both ends of the toggle block 8; the second clamping block 7 is extended to the end close to the push plate 306 with a second pressing plate 701, and the push plate 306 is pressed on the second pressing plate 701 along the pushing direction of the cavity changing mechanism 3; the cavity mold core 5 corresponds to the sliding push rod 305 and the push plate 306. A slope slide 502 is fixedly set at the position of 05, and the sliding top rod 305 slides against the slope slide 502; the toggle block 8 includes a rotating rod, and the toggle block 8 is rotated in the second mounting cavity 401 by moving the rotating rod, and the rotating push rod 303 is pressed on one end of the side of the toggle block 8 along the pushing direction of the cavity changing mechanism 3; the first clamping block 6 is extended to a side close to the rotating push rod 303 to be provided with a first pressing plate 601, and the first pressing plate 601 is pressed on one end of the side of the toggle block 8 away from the rotating push rod 303 along the pushing direction of the cavity changing mechanism 3.

[0030] Example 2

[0031] like Figure 1 , Figure 2 and Figure 4As shown, an injection mold for facilitating replacement of a product cavity comprises a fixed mold 1 and a movable mold, and also comprises a cavity changing mechanism 3, a first clamping block 6 and a second clamping block 7. The movable mold comprises a movable mold front plate 2, a movable mold rear plate 4 and a cavity mold core 5; the cavity mold core 5 is detachably embedded in the movable mold front plate 2 through the first clamping block 6 and the second clamping block 7; a first mounting cavity 201 is provided in the movable mold front plate 2, and the cavity mold core 5 is detachably mounted in the first mounting cavity 201; the first clamping block 6 and the second clamping block 7 are respectively clamped on opposite sides of the cavity mold core 5, and the first clamping block 6 and the second clamping block 7 are away from the cavity mold core 5 are elastically mounted on the inner wall of the first mounting cavity 201; the cavity mold core 5 is provided with a slot 501 on both opposite sides, and the first clamping block 6 and the second clamping block 7 are provided with corresponding first bevel buckles 602 and second bevel buckles 702 at one end close to the slot 501, and the first bevel buckles 602 and the second bevel buckles 702 are correspondingly connected in the adjacent slots 501 one by one; the first clamping block 6 and the second clamping block 7 are fixedly mounted with a return spring 9 at one end away from the cavity mold core 5, and the return spring 9 is fixedly mounted on the inner wall of the corresponding cavity mold core 5.

[0032] like Figure 1 , Figure 4 and Figure 5 As shown, a cavity changing mechanism 3 is elastically installed inside the movable mold rear plate 4, and the positions of the cavity changing mechanism 3 corresponding to the mold core 5, the first clamping block 6 and the second clamping block 7 are provided with a sliding push rod 305, a rotating push rod 303 and a push plate 306 in a one-to-one correspondence; the cavity changing mechanism 3 includes a pressing block 301 and a cross bar 302, and a second installation cavity 401 is opened at a position of the movable mold rear plate 4 corresponding to the first installation cavity 201, and the cross bar 302 is slidably installed in the second installation cavity 401, and one end of the cross bar 302 close to the second clamping block 7 is elastically connected to the inner wall of the second installation cavity 401; the cross bar 30 A pressing block 301 is fixedly installed at one end close to the first clamping block 6, a penetrating pressing hole 402 is provided at a position close to the pressing block 301 in the second installation cavity 401, the pressing block 301 is slidably installed in the pressing hole 402, and a sliding push rod 305, a rotating push rod 303 and a push plate 306 are provided at positions of the cross bar 302 corresponding to the cavity mold core 5, the first clamping block 6 and the second clamping block 7; a supporting spring 10 is fixedly installed at one end of the cross bar 302 close to the second clamping block 7, and the supporting spring 10 is fixedly installed on the inner wall of the adjacent second installation cavity 401.

[0033] like Figure 1 , Figure 4 and Figure 6As shown, the sliding push rod 305 and the push plate 306 are both in contact with the corresponding cavity mold core 5 and the second clamping block 7 at one end close to the movable mold front plate 2; the movable mold rear plate 4 is rotatably installed with a toggle block 8 located between the rotating push rod 303 and the first clamping block 6, and the rotating push rod 303 and the first clamping block 6 are respectively abutted at both ends of the toggle block 8; the second clamping block 7 is extended to the end close to the push plate 306 with a second pressing plate 701, and the push plate 306 is pressed on the second pressing plate 701 along the pushing direction of the cavity changing mechanism 3; the cavity mold core 5 corresponds to the sliding push rod 305 and the push plate 306. A slope slide 502 is fixedly set at the position of 05, and the sliding top rod 305 slides against the slope slide 502; the toggle block 8 includes a rotating rod, and the toggle block 8 is rotated in the second mounting cavity 401 by moving the rotating rod, and the rotating push rod 303 is pressed on one end of the side of the toggle block 8 along the pushing direction of the cavity changing mechanism 3; the first clamping block 6 is extended to a side close to the rotating push rod 303 to be provided with a first pressing plate 601, and the first pressing plate 601 is pressed on one end of the side of the toggle block 8 away from the rotating push rod 303 along the pushing direction of the cavity changing mechanism 3.

[0034] The working principle of the utility model is as follows: when the cavity mold core 5 needs to be replaced, the pressing block 301 is pressed, and the pressing block 301 drives the cross bar 302 to move, and then the push plate 306 on the cross bar 302 squeezes the second pressing plate 701 in the second clamping block 7, and then the second clamping block 7 is retracted toward the inside of the movable mold front plate 2, so that the second inclined surface buckle 702 is disengaged from the slot in the cavity mold core 5, and at the same time, the push rod 303 is rotated to press the toggle block 8 with the movement of the cross bar 302, so that the toggle block 8 is rotated and moves in the opposite direction by abutting against one end of the first pressing plate 601, so that the first clamping block 6 is retracted toward the inside of the movable mold front plate 2, so that the first inclined surface buckle 602 is disengaged from the slot 501 in the cavity mold core 5; secondly, as the cross bar moves, the sliding push rod 305 moves on the slope slide 502 along with the cross bar 302, and the slope slide 5 02 has a horizontal section at the front end. When the first clamping block 6 and the second clamping block 7 are both out of the corresponding clamping groove 501, the sliding push rod 305 slides to the inclined surface of the ramp slide 502, and as it slides to a higher inclined surface, the cavity mold core 5 is gradually pushed out of the first installation cavity 201; then after the cavity mold core 5 is taken out, the cavity changing mechanism 3, the first clamping block 6 and the second clamping block 7 are restored to their original positions through the corresponding supporting springs 10 and the reset springs 9; then the cavity mold core 5 to be replaced is pressed into the first installation cavity 201, and the cavity mold core 5 retracts the first clamping block 6 and the second clamping block 7 into the movable mold front plate 2 by squeezing the inclined surfaces of the first inclined surface buckle 602 and the second inclined surface buckle 702. After the cavity mold core 5 is completely pressed in, the first clamping block 6 and the second clamping block 7 automatically reset and clamp the cavity mold core 5.

[0035] In summary, the utility model provides a cavity changing mechanism 3, a cavity mold core 5, a first clamping block 6 and a second clamping block 7; the first clamping block 6 and the second clamping block 7 enable the cavity mold core 5 to be easily loaded and unloaded, so that when it is necessary to produce products of other sizes, it is only necessary to replace the corresponding cavity mold core 5, and there is no need to disassemble the entire mold, which is simple, convenient and cost-saving; by providing a ramp slide 502 and a sliding ejector rod 305, the sliding ejector rod 305 gradually moves on the ramp slide 502, so that the cavity mold core 5 is automatically ejected, and the disassembly of the cavity mold core 5 is convenient.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, 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 for facilitating replacement of a product cavity, comprising a fixed mold (1) and a movable mold, characterized in that: The movable mold further comprises a cavity changing mechanism (3), a first clamping block (6) and a second clamping block (7); the movable mold comprises a movable mold front plate (2), a movable mold rear plate (4) and a cavity mold core (5); the cavity mold core (5) is detachably embedded in the movable mold front plate (2) through the first clamping block (6) and the second clamping block (7); the movable mold rear plate (4) is elastically provided with a cavity changing mechanism (3), and the positions of the cavity mold core (5), the first clamping block (6) and the second clamping block (7) in the cavity changing mechanism (3) are one-to-one matched. A sliding push rod (305), a rotating push rod (303) and a push plate (306) are provided; the sliding push rod (305) and the push plate (306) are both in contact with the corresponding cavity mold core (5) and the second clamping block (7) at one end close to the movable mold front plate (2); a toggle block (8) located between the rotating push rod (303) and the first clamping block (6) is rotatably installed in the movable mold rear plate (4), and the rotating push rod (303) and the first clamping block (6) are respectively in contact with the two ends of the toggle block (8).

2. The injection mold for facilitating the replacement of product cavities according to claim 1, characterized in that: A first mounting cavity (201) is provided in the movable mold front plate (2), and the cavity mold core (5) is detachably mounted in the first mounting cavity (201); a first clamping block (6) and a second clamping block (7) are respectively clamped on opposite sides of the cavity mold core (5), and the ends of the first clamping block (6) and the second clamping block (7) away from the cavity mold core (5) are elastically mounted on the inner wall of the first mounting cavity (201).

3. The injection mold for facilitating replacement of product cavities according to claim 2, characterized in that: The cavity mold core (5) is provided with a card slot (501) on two opposite sides, and the first card block (6) and the second card block (7) are provided with a corresponding first bevel card buckle (602) and a second bevel card buckle (702) at one end close to the card slot (501), and the first bevel card buckle (602) and the second bevel card buckle (702) are correspondingly connected in the adjacent card slots (501).

4. The injection mold for facilitating replacement of product cavities according to claim 2, characterized in that: A return spring (9) is fixedly mounted on one end of the first clamping block (6) and the second clamping block (7) away from the cavity mold core (5); the return spring (9) is fixedly mounted on the inner wall of the corresponding cavity mold core (5).

5. The injection mold for facilitating replacement of product cavities according to claim 1, characterized in that: The cavity changing mechanism (3) comprises a pressing block (301) and a cross bar (302); a second installation cavity (401) is provided at a position of the movable mold rear plate (4) corresponding to the first installation cavity (201); the cross bar (302) is slidably installed in the second installation cavity (401); one end of the cross bar (302) close to the second clamping block (7) is elastically connected to the inner wall of the second installation cavity (401); a pressing block (301) is fixedly installed at one end of the cross bar (302) close to the first clamping block (6); a penetrating pressing hole (402) is provided at a position of the second installation cavity (401) close to the pressing block (301); the pressing block (301) is slidably installed in the pressing hole (402); and a sliding push rod (305), a rotating push rod (303) and a push plate (306) are provided on the cross bar (302) corresponding to the positions of the cavity mold core (5), the first clamping block (6) and the second clamping block (7).

6. The injection mold for facilitating replacement of product cavities according to claim 5, characterized in that: A support spring (10) is fixedly mounted on one end of the cross bar (302) close to the second clamping block (7), and the support spring (10) is fixedly mounted on the inner wall of a second adjacent mounting cavity (401).

7. The injection mold for facilitating replacement of product cavities according to claim 1, characterized in that: A second pressing plate (701) is extended from one end of the second clamping block (7) close to the push plate (306), and the push plate (306) is pressed on the second pressing plate (701) along the pushing direction of the cavity changing mechanism (3); a slope slide (502) is fixedly provided at the position of the cavity mold core (5) corresponding to the sliding push rod (305), and the sliding push rod (305) is slidably abutted on the slope slide (502).

8. The injection mold for facilitating replacement of product cavities according to claim 1, characterized in that: The toggle block (8) comprises a rotating rod, and the toggle block (8) is rotated in the second mounting cavity (401) by moving the rotating rod, and the rotating push rod (303) is pressed on one end of the side of the toggle block (8) along the pushing direction of the cavity changing mechanism (3); the first clamping block (6) is provided with a first pressing plate (601) extending from a side close to the rotating push rod (303), and the first pressing plate (601) is pressed on one end of the side of the toggle block (8) away from the rotating push rod (303) along the pushing direction of the cavity changing mechanism (3).

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