CN117584388A - Injection mold with guide structure - Google Patents

Abstract

The invention relates to the technical field of injection molds, in particular to an injection mold with a guide structure, which comprises a first mold and a second mold, wherein guide grooves which are symmetrically distributed are arranged on the side surface of the first mold, guide strips which are symmetrically distributed and are matched with the guide grooves are fixedly connected to the side surface of the second mold, gears which are symmetrically distributed are rotationally connected to the side surface of the first mold, teeth which are equidistantly distributed and can be meshed with the gears are fixedly arranged on the guide strips, a plurality of push rods are arranged in the first mold, and the push rods are connected with the gears through a transmission mechanism; according to the invention, the guide groove and the guide strip are matched to play a guide role on the two dies, so that the die grooves can be aligned, the quality of an injection molding piece after molding is ensured, the purpose of automatic demolding can be realized after the two dies are separated, the injection molding piece is not required to be taken out from the die grooves manually, the time is saved, and the production efficiency of the injection molding piece is improved.

Description

An injection mold with guide structure

Technical field

The invention relates to the technical field of injection molds, specifically an injection mold with a guide structure.

Background technique

Injection molding is also called injection molding. It is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, many colors and varieties, and the shape can be from simple to complex. The size can be from large to small, and the product size is accurate, the product is easy to replace, and can be made into parts with complex shapes. Injection molding is suitable for mass production and complex-shaped products and other molding processing fields.

Injection molds in the prior art generally consist of two moulds. The side walls of the two molds are provided with matching mold grooves. When in use, the two mold grooves are aligned and the two molds are closely fitted, and then the injection molding process is completed. The hole injects molten plastic into the mold cavity, and after cooling, an injection molded part is formed.

However, it is difficult to ensure that the two mold slots are aligned with each other when using this kind of injection mold, which can easily affect the quality of the injection molded parts. Moreover, after the injection molded parts are formed, the injection molded parts need to be manually taken out from the mold slot, which wastes time and reduces the cost of the injection molded parts. production efficiency.

Contents of the invention

The object of the present invention is to provide an injection mold with a guide structure to solve the problems raised in the above background art.

In order to achieve the above objects, the present invention provides the following technical solutions:

An injection mold with a guide structure includes a first mold and a second mold. A first mold groove is provided on the side wall of the first mold. The first mold groove is connected with an injection hole. The second mold side wall is provided with a The second mold groove is matched to the first mold groove. The side of the first mold is provided with symmetrically distributed guide grooves. The side of the second mold is fixedly connected with symmetrically distributed guide bars that are adapted to the guide grooves. There is a self-locking mechanism inside the guide groove. When the first mold and the second mold are attached, the self-locking mechanism is used to fix the first mold and the second mold. The side of the first mold is rotated and connected with symmetrically distributed The gear, the guide bar is fixed with teeth that are equidistantly distributed and can mesh with the gear. There are multiple push rods inside the first mold. The push rods are connected to the gear through a transmission mechanism. The transmission mechanism is used to convert the rotation of the gear. It is the thrust force so that the push rod can push the formed mold out from the inside of the first mold groove.

Further: the self-locking mechanism includes a limiting groove provided on the top of the guide bar. A first chute is provided on the top of the guide groove. A first wedge-shaped block is slidably connected inside the first chute. The first wedge-shaped block A first elastic component is fixedly connected to the top, and the other end of the first elastic component is fixedly connected to the top of the first chute.

Further: a tie rod is fixedly connected to the top of the first wedge-shaped block, and the tie rod penetrates the top of the first mold and is slidingly connected with the first mold.

Further: the transmission mechanism includes a support plate fixedly connected to the push rod, the support plate is connected to the inner wall of the first mold groove through a second elastic component, wherein a second slide groove is provided inside the first mold, and the second slide groove is provided inside the first mold. There is a support rod slidingly connected inside the groove. One end of the support rod is fixedly connected to the support plate. The other end of the support rod is connected to the gear through an extrusion assembly. The extrusion assembly is used to squeeze the support rod so that the support rod drives and pushes through the support plate. The rod moves outward.

Further: the extrusion assembly includes a third chute provided on the side wall of the second chute, a second wedge-shaped block is slidingly connected inside the third chute, and the slope of the second wedge-shaped block is connected with the end of the strut in conflict, The top of the second wedge-shaped block is fixedly connected with a third elastic component, the upper end of the third elastic component is fixedly connected with the top of the third chute, the top of the second wedge-shaped block is fixedly connected with a resisting rod, and the resisting rod penetrates the third chute. There is a turntable inside the first mold, the turntable is connected with the upper end of the resisting rod, and the side of the turntable is provided with protrusions. The inside of the turntable has a rotating rod, which penetrates the side wall of the first mold and is connected with the two respective sides. The gear is fixedly connected.

Further: the convex surface is provided with a groove, and the top of the support rod is provided with a rounded corner that matches the groove.

Further: both the second elastic component and the third elastic component are springs.

Compared with the prior art, the beneficial effects of the present invention are: the present invention plays a guiding role for the two molds through the cooperation of the guide groove and the guide bar, so that after the first mold and the second mold side wall are attached, the first mold The mold groove and the second mold groove can be aligned, thereby ensuring the quality of the injection molded parts after molding. When the injection molded parts are formed, the guide bar drives the gear to rotate in reverse through the teeth, and the gear drives the turntable to rotate through the rotating rod, and the turntable passes through the protrusion Squeeze the support rod so that the support rod squeezes the support rod through the second wedge-shaped block, and the support rod drives the push rod to move outward through the support plate, thereby pushing the formed injection molded part out of the first mold slot to achieve automatic demoulding. , there is no need to manually remove the injection molded parts from the first mold cavity, which saves time and improves the production efficiency of the injection molded parts. Moreover, the meshing of the gears and teeth can also play a limiting role on the guide bar, improving the guiding effect. , further ensuring stable performance between the two molds.

Description of drawings

Figure 1 is a schematic structural diagram of a second mold in an embodiment of the present invention.

Figure 2 is a schematic structural diagram of the first mold in the embodiment of the present invention.

Figure 3 is a cross-sectional view of the internal structure of the first mold in the embodiment of the present invention.

Figure 4 is an enlarged view of point A in Figure 3.

Figure 5 is a cross-sectional view of the first wedge block connection structure in the embodiment of the present invention.

In the picture: 1-first mold; 2-second mold; 3-first mold groove; 4-second mold groove; 5-self-locking mechanism; 51-limiting groove; 52-first wedge block; 53- First chute; 54-first elastic component; 55-pull rod; 6-transmission mechanism; 61-support rod; 62-support plate; 63-second elastic component; 64-rotating rod; 65-turntable; 66-convex from; 67-groove; 68-round corner; 69-butt bar; 610-third elastic component; 611-second wedge block; 612-second slide groove; 613-third slide groove; 7-guide bar; 8-Guide groove; 9-Teeth; 10-Gear; 11-Injection hole; 12-Push rod.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

In one embodiment, please refer to Figures 1, 2 and 3. An injection mold with a guide structure includes a first mold 1 and a second mold 2. A first mold is provided on the side wall of the first mold 1. Groove 3, the first mold groove 3 is connected with an injection hole 11, the side wall of the second mold 2 is provided with a second mold groove 4 that matches the first mold groove 3, and the side of the first mold 1 is provided with a symmetrical Distributed guide grooves 8, the side of the second mold 2 is fixedly connected with guide bars 7 that are symmetrically distributed and adapted to the guide grooves 8. The guide groove 8 is equipped with a self-locking mechanism 5 inside. When the first mold 1 and the second mold 2 When the two molds 2 are fitted together, the self-locking mechanism 5 is used to fix the first mold 1 and the second mold 2. The first mold 1 is rotatably connected to the side of the first mold 1 with symmetrically distributed gears 10, and the guide bars 7 are fixed with equidistantly distributed gears 10. And there are teeth 9 that can mesh with the gear 10. The first mold 1 is provided with a plurality of push rods 12. The push rods 12 are connected to the gear 10 through a transmission mechanism 6. The transmission mechanism 6 is used to convert the rotation of the gear 10. It is the thrust force so that the push rod 12 can push the formed mold out from the inside of the first mold cavity 3 .

In this embodiment, when the injection mold is in use, the guide bars 7 on both sides of the second mold 2 are inserted into the guide grooves 8 on both sides of the first mold 1 respectively, and the second mold is moved along the extension direction of the guide groove 8. Mold 2, until the side walls of the first mold 1 and the second mold 2 fit together, in which the guide groove 8 plays a guiding role for the second mold 2 through the guide bar 7, so that the first mold 1 and the side walls of the second mold 2 After fitting, the first mold groove 3 and the second mold groove 4 can be aligned, thereby ensuring the quality of the injection molded parts after molding. After the first mold 1 and the second mold 2 are fixed, the first mold groove 3 and the second mold groove 4 can be molded through the injection hole 11 to the first mold cavity 11. Molten plastic is injected into the mold cavity 3 and the second mold cavity 4 to complete the molding of the injection molded part. After the side walls of the first mold 1 and the second mold 2 are attached, the self-locking mechanism 5 inside the guide groove 8 will automatically align the guide. The strip 7 is fixed, thereby playing a fixing role for the second mold 2, so that the first mold 1 and the second mold 2 can be closely fitted, and the friction between the first mold 1 and the second mold 2 during the injection molding process can be avoided. The shaking phenomenon further ensures the quality of the injection molded parts after molding. At the same time, there are multiple push rods 12 inside the first mold 1. Initially, the ends of the push rods 12 are located inside the first mold groove 3. As the guide bars 7 move in When the inside of the guide groove 8 moves, the teeth 9 on the side wall of the guide bar 7 will mesh with the gear 10, thereby driving the gear 10 to rotate. The gear 10 drives the push rod 12 to move through the transmission mechanism 6, so that the push rod 12 enters the first position. Inside the mold 1, the impact of the push rod 12 on the injection molded part is avoided. After the injection molding is completed, the first mold 1 and the second mold 2 are separated. The teeth 9 drive the gear 10 to rotate in the reverse direction, and the gear 10 is driven by the transmission mechanism 6 The push rod 12 moves outward to push the molded injection molded part out of the first mold groove 3, and the injection molded part automatically falls off. There is no need to manually take the injection molded part out of the first mold groove 3, which saves time and improves the efficiency of injection molding. The production efficiency of the parts is improved, and the meshing of the gear 10 and the teeth 9 can also play a limiting role on the guide bar 7, improving the guiding effect and further ensuring the stability between the first mold 1 and the second mold 2.

Please refer to Figures 1 and 5. The self-locking mechanism 5 includes a limiting groove 51 provided on the top of the guide bar 7. A first chute 53 is provided on the top of the guide groove 8. The first chute 53 is slidably connected inside. The first wedge-shaped block 52 has a first elastic component 54 fixedly connected to the top of the first wedge-shaped block 52, and the other end of the first elastic component 54 is fixedly connected to the top of the first chute 53;

When guiding the second mold 2, the second mold 2 drives the guide bars 7 on both sides of the second mold 2 to slide inside the guide grooves 8 on both sides of the first mold 1. When the guide bars 7 move to a certain position, the ends of the guide bars 7 The inclined surface of the first wedge-shaped block 52 is pressed completely, so that the first wedge-shaped block 52 enters the inside of the first chute 53. When the side walls of the first mold 1 and the second mold 2 are in contact, the limiting groove 51 happens to be in contact with the first chute 53. A slide groove 53 is aligned. Under the action of the first elastic component 54, the first wedge-shaped block 52 automatically enters the inside of the limiting groove 51. The first elastic component 54 can be a spring, and the plane of the first wedge-shaped block 52 passes through the limiting groove 51. The groove 51 plays a supporting role for the guide bar 7, thereby limiting the outward movement of the guide bar 7, and then plays an automatic fixing role for the first mold 1 and the second mold 2, effectively improving the stability between the two. The quality of injection molded parts after molding is guaranteed.

Please refer to Figure 5. The top of the first wedge-shaped block 52 is fixedly connected with a tie rod 55. The tie rod 55 penetrates the top of the first mold 1 and is slidingly connected with the first mold 1;

After the injection molded part is formed, pull the pull rod 55 outward, and pull the first wedge block 52 into the first chute 53 through the pull rod 55. When the first wedge block 52 is no longer limited, the first mold 1 can be connected to the first mold 1. The second mold 2 is separated, the structure is simple, and the first mold 1 and the second mold 2 can be quickly separated.

Please refer to Figures 3 and 4. The transmission mechanism 6 includes a support plate 62 fixedly connected to the push rod 12. The support plate 62 is connected to the inner wall of the first mold cavity 3 through a second elastic component 63, wherein the first mold 1 is provided with a second chute 612 inside, and a strut 61 is slidably connected inside the second chute 612. One end of the strut 61 is fixedly connected to the support plate 62, and the other end of the strut 61 is connected to the gear 10 through an extrusion assembly. The pressing assembly is used to squeeze the support rod 61 so that the support rod 61 drives the push rod 12 to move outward through the support plate 62;

Initially, the end of the push rod 12 is located inside the first die groove 3. As the guide bar 7 slides inside the guide groove 8, the guide bar 7 drives the gear 10 to rotate through the teeth 9, and the gear 10 triggers the operation of the extrusion assembly, so that The extrusion assembly no longer squeezes the support rod 61. Under the action of the second elastic component 63, which can be a spring, the support plate 62 drives the push rod 12 to move toward the inside of the first mold 1 until it is pushed. The end of the rod 12 is aligned with the inner wall of the first mold groove 3, which avoids the influence of the push rod 12 on the molding of the injection molded part. When the molding of the injection molded part is completed, the first mold 1 and the second mold 2 are separated, and the teeth 9 drive the gear 10 in reverse. Rotate in the direction, the gear 10 squeezes the support rod 61 through the extrusion assembly, and the support rod 61 drives the push rod 12 to move outward through the support plate 62, and the injection molded part inside the first mold groove 3 is pushed out through the push rod 12, thereby achieving The automatic demoulding of the injection molded parts does not require manual removal of the injection molded parts from the inside of the first mold slot 3, which saves time and improves the production efficiency of the injection molded parts.

Please refer to Figure 4. The extrusion assembly includes a third chute 613 provided on the side wall of the second chute 612. A second wedge-shaped block 611 is slidably connected inside the third chute 613. The inclined surface of the second wedge-shaped block 611 is connected to The end of the support rod 61 is connected with friction, the top of the second wedge-shaped block 611 is fixedly connected with a third elastic component 610, the upper end of the third elastic component 610 is fixedly connected with the top of the third chute 613, and the top of the second wedge-shaped block 611 is fixed A resisting rod 69 is connected, and the resisting rod 69 penetrates the third chute 613. A turntable 65 is provided inside the first mold 1. The turntable 65 is connected with the upper end of the resisting rod 69, and a protrusion 66 is provided on the side of the turntable 65. A rotating rod 64 penetrates through the inside of the turntable 65, and the rotating rod 64 penetrates through the side wall of the first mold 1 and is fixedly connected to the two gears 10 respectively;

Initially, the end of the push rod 12 is located inside the first mold groove 3. As the guide bar 7 slides inside the guide groove 8, the guide bar 7 drives the gear 10 to rotate through the teeth 9, and the gear 10 drives the turntable 65 through the rotating rod 64. Rotation, at this time, under the action of the third elastic component 610, the third elastic component 610 can be a spring, the annular surface of the turntable 65 is connected with the end of the push rod 69, and at the same time, under the action of the second elastic component 63, the push rod The end of 12 is aligned with the inner wall of the first mold groove 3. As the second mold 2 continues to move, although the guide bar 7 can continue to drive the gear 10 to rotate through the teeth 9, the degree of squeezing of the resisting rod 69 by the turntable 65 is not will change, and the degree of extrusion of the support rod 61 will not change, thus ensuring that during the entire process, the end of the push rod 12 is always aligned with the inner wall of the first mold groove 3, and during the injection molding process, the turntable Under the extrusion of the 65 annular surface, the end of the push rod 12 is always aligned with the inner wall of the first mold groove 3. The injection molded part will not push the push rod 12 due to excessive pressure during the molding process, and enter the third mold cavity along with the push rod 12. The phenomenon inside the first mold 1 ensures the quality of the injection molded parts after molding. When the injection molded parts are formed, the second mold 2 is separated from the first mold 1, and the turntable 65 squeezes the resisting rod 69 through the protrusion 66, so that the resisting rod 69 The second wedge-shaped block 611 is driven to move downward, and the second wedge-shaped block 611 squeezes the support rod 61. The support rod 61 drives the push rod 12 to move outward through the support plate 62, and then the molded injection molded part is pushed out from the inside of the first mold slot 3. Launched to achieve the purpose of automatic demoulding, saving time and improving the production efficiency of injection molded parts.

Please refer to Figure 4. The surface of the protrusion 66 is provided with a groove 67, and the top of the resisting rod 69 is provided with a rounded corner 68 that matches the groove 67;

When the gear 10 is out of mesh with the teeth 9, the protrusion 66 on the side of the turntable 65 is just in contact with the support rod 61. At this time, the fillet 68 is located inside the groove 67, and the fillet 68 can play a role in the turntable 65 through the groove 67. A limiting function prevents the resisting rod 69 from accidentally pushing the turntable 65 to rotate, ensuring the stable performance of the turntable 65.

Working principle: When the injection mold is in use, insert the guide bars 7 on both sides of the second mold 2 into the guide grooves 8 on both sides of the first mold 1, and move the second mold 2 along the extension direction of the guide groove 8. Until the side walls of the first mold 1 and the second mold 2 fit together, the guide groove 8 can play a guiding role in the second mold 2 through the guide bars 7 so that the side walls of the first mold 1 and the second mold 2 fit together. After that, the first mold groove 3 and the second mold groove 4 can be aligned, thus ensuring the quality of the injection molded parts after molding. Initially, the end of the push rod 12 is located inside the first mold groove 3. As the guide bar 7 moves in the guide groove 8 internal sliding, the guide bar 7 drives the gear 10 to rotate through the teeth 9, and the gear 10 drives the turntable 65 to rotate through the rotating rod 64. At this time, the annular surface of the turntable 65 is connected with the end of the push rod 69, and the end of the push rod 12 is connected with the end of the push rod 69. The inner walls of the first mold groove 3 are aligned, thus avoiding the influence of the push rod 12 on the molding of the injection molded parts. When the side walls of the first mold 1 and the second mold 2 are in contact, the limiting groove 51 is exactly aligned with the first chute 53 , the first wedge-shaped block 52 automatically enters the inside of the limiting groove 51, and the plane of the first wedge-shaped block 52 plays a supporting role on the guide bar 7 through the limiting groove 51, thereby restricting the outward movement of the guide bar 7, and thereby supporting the first Mold 1 and second mold 2 play an automatic fixing role, effectively improving the stability between the two and ensuring the quality of the injection molded parts after molding. After the injection molded parts are molded, the second mold 2 is separated from the first mold 1 , the protrusion 66 on the side of the turntable 65 squeezes the resisting rod 69, the resisting rod 69 drives the second wedge block 611 to move downward, and the second wedge block 611 squeezes the support rod 61, so that the support rod 61 drives the push rod 12 through the support plate 62 Move outward to push the molded injection molded part out from the inside of the first mold slot 3 to achieve automatic demoulding, save time and improve the production efficiency of the injection molded part.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (7)

1. An injection mold with a guide structure comprises a first mold and a second mold, wherein a first mold groove is formed in the side wall of the first mold, an injection hole is communicated with the first mold groove, and a second mold groove matched with the first mold groove is formed in the side wall of the second mold; the novel mold is characterized in that guide grooves which are symmetrically distributed are formed in the side face of the first mold, guide strips which are symmetrically distributed and are matched with the guide grooves are fixedly connected to the side face of the second mold, a self-locking mechanism is arranged in the guide grooves, when the first mold is attached to the second mold, the self-locking mechanism is used for fixing the first mold and the second mold, gears which are symmetrically distributed are rotationally connected to the side face of the first mold, teeth which are equidistantly distributed and can be meshed with the gears are fixedly arranged on the guide strips, a plurality of push rods are arranged in the first mold, the push rods are connected with the gears through a transmission mechanism, and the transmission mechanism is used for converting rotation of the gears into thrust, so that the push rods can push the molded mold out of the interior of the first mold.

2. The injection mold with the guide structure according to claim 1, wherein the self-locking mechanism comprises a limit groove arranged at the top of the guide bar, a first sliding groove is arranged at the top of the guide groove, a first wedge block is slidably connected inside the first sliding groove, a first elastic component is fixedly connected to the top of the first wedge block, and the other end of the first elastic component is fixedly connected with the top of the first sliding groove.

3. The injection mold with guide structure according to claim 2, wherein the first wedge top is fixedly connected with a pull rod, and the pull rod penetrates through the first mold top and is slidably connected with the first mold.

4. The injection mold with the guide structure according to claim 1, wherein the transmission mechanism comprises a supporting plate fixedly connected with the push rod, the supporting plate is connected with the inner wall of the first mold cavity through a second elastic component, a second sliding groove is formed in the first mold, a supporting rod is slidably connected in the second sliding groove, one end of the supporting rod is fixedly connected with the supporting plate, the other end of the supporting rod is connected with the gear through an extrusion component, and the extrusion component is used for extruding the supporting rod, so that the supporting rod drives the push rod to move outwards through the supporting plate.

5. The injection mold with the guide structure according to claim 4, wherein the extrusion assembly comprises a third chute arranged on the side wall of the second chute, a second wedge block is slidably connected in the third chute, an inclined surface of the second wedge block is in abutting connection with the end part of the supporting rod, a third elastic component is fixedly connected to the top of the second wedge block, the upper end of the third elastic component is fixedly connected with the top of the third chute, a supporting rod is fixedly connected to the top of the second wedge block, the supporting rod penetrates through the third chute, a rotary table is arranged in the first mold and is in abutting connection with the upper end of the supporting rod, a protrusion is arranged on the side surface of the rotary table, a rotary rod penetrates through the side wall of the first mold, and the rotary rod penetrates through the side wall of the first mold and is respectively fixedly connected with two gears.

6. The injection mold with guide structure according to claim 5, wherein the convex surface is provided with a groove, and the top of the supporting rod is provided with a round corner matched with the groove.

7. The injection mold with guide structure according to claim 5 or 6, wherein the second elastic member and the third elastic member are springs.