A mold return mechanism

Abstract

This invention is a mold return mechanism, comprising: an upper mold plate, with a pull rod movably connected to the lower mold plate via a first elastic element and a first rotating element. The pull rod has a clearance groove and a first hook on the side away from the upper mold plate, and the first hook has a first inclined surface near the lower mold plate; a lower mold plate, with a first lever and a second lever on the side near the upper mold plate, connected by a connecting module. The fulcrum positions of the two levers are respectively rotatably connected within the lower mold plate via a second rotating element and a third rotating element. The end of the first lever away from the second lever has a positioning element that extends through the lower mold core to the product end and moves within the lower mold core via the first lever. The end of the second lever away from the first lever has a second hook, and the second hook has a second inclined surface near the upper mold plate that cooperates with the first inclined surface. The beneficial effect of this invention is that, through the above mechanism, when the mold system has many and complex mechanisms, this invention's return mechanism can make reasonable use of the mold space in conjunction with other mechanisms.

Description

[Technical Field]

[0001] This invention relates to the field of mold mechanism technology, and in particular to a mold return mechanism. [Background Technology]

[0002] Return mechanisms are often used in molds such as plastic molds or hot press molds. However, the design and use of return mechanisms are often limited by the overall spatial layout and size of the mold, as well as interference from other related structures, making it difficult to install return mechanisms in the mold.

[0003] In a typical spring ejector pin return mechanism, due to the high temperature of the mold, the spring is not resistant to high temperatures. After prolonged use, the elasticity of the spring will decrease, affecting the ejector pin's return and product ejection. In addition, as the ejector pin's working time increases, the raw material of the molded product inside the mold will flow into the gap of the ejector pin's movable hole, causing the ejector pin to get stuck. Therefore, the spring cannot push the ejector pin to return to its original position, which will affect the ejector pin's ability to eject the product.

[0004] In view of this, it is necessary to provide a mold return mechanism to solve the above problems. [Summary of the Invention]

[0005] The technical problem this invention aims to solve is that return mechanisms are frequently used in molds such as plastic molds or hot press molds. However, the design and use of return mechanisms are often limited by the overall spatial layout and size of the mold, as well as interference from other related structures, making it difficult to install return mechanisms within the mold. Therefore, this invention provides a mold return mechanism to solve the above problems.

[0006] The solution to the technical problem of this invention is: a mold return mechanism, comprising:

[0007] The upper template has an upper mold core and a connecting seat fixedly connected to the side of the upper template near the lower template. A tie rod is movably connected inside the connecting seat through a first elastic element. The side of the tie rod near the connecting seat is rotatably connected inside the connecting seat through a first rotating element. The side of the tie rod away from the connecting seat is provided with a clearance groove and a first hook. The side of the first hook near the lower template is provided with a first inclined surface.

[0008] The lower mold plate has a lower mold core fixedly connected to the side of the lower mold plate near the upper mold plate. The lower mold core and the upper mold core cooperate to form the product. A lever module is provided on the side of the lower mold plate near the lower mold core. The lever module has at least one set of first levers and at least one set of second levers. The first levers and second levers are intersecting and connected by a connecting module. The first levers and second levers are respectively provided with a first support and a second support on the side of the lower mold plate near the lower mold plate. The first support and the second support are both fixedly connected in the lower mold plate. The fulcrum positions of the first levers and the second levers are respectively rotatably connected in the first support and the second support by a second rotating component and a third rotating component. The end of the first lever away from the second lever is provided with a positioning component. The positioning component extends through the lower mold core to the product end and is movably disposed in the lower mold core. The positioning component is used for positioning and ejecting the product. The end of the second lever away from the first lever is provided with a second hook. The side of the second hook near the upper mold plate is provided with a second inclined surface. The second inclined surface cooperates with the first inclined surface of the first hook of the pull rod.

[0009] Preferably, the first elastic element includes, but is not limited to, a spring.

[0010] Preferably, a fixing hole is provided on the side of the pull rod that contacts the first rotating member, and a fixing member is fixedly connected in the fixing hole. The fixing member passes through the fixing hole and presses against the first rotating member to prevent the first rotating member from falling out of the pull rod. The fixing member includes, but is not limited to, a screw.

[0011] Preferably, the connecting module includes a movable block. The movable block has a rotating structure on the side near the first lever, and a limiting groove on the side of the rotating structure near the first lever. The movable block is rotatably connected to the first lever via a first connector in the limiting groove. The movable block is fixedly connected to the second lever via a second connector on the side near the second lever. The movable block is used to rotatably connect the second lever in different directions to the first lever. The first connector includes, but is not limited to, a spring pin. The spring pin can achieve self-locking and prevent the pin from falling out after insertion. The second connector includes, but is not limited to, a pin.

[0012] Preferably, the first rotating member, the second rotating member, and the third rotating member include, but are not limited to, rotating shafts.

[0013] Preferably, the positioning element includes, but is not limited to, a positioning pin.

[0014] Preferably, the first lever has a positioning end and a second elastic element on the side away from the upper template. The second elastic element is used to assist the positioning element in returning to its original position. The second elastic element includes, but is not limited to, a spring.

[0015] The beneficial effects of this invention are as follows: This invention provides a mold return mechanism, which employs a pull rod movably connected within the upper mold plate by a first elastic element and a first rotating element. The pull rod has a clearance groove and a first hook on the side away from the upper mold plate, and the first hook has a first inclined surface on the side near the lower mold plate. The lower mold plate contains a first lever and a second lever, which intersect and are connected by a connecting module. The fulcrum positions of the first and second levers are rotatably connected within the lower mold plate by a second rotating element and a third rotating element, respectively. The end of the first lever away from the second lever has a positioning element that extends through the lower mold core to the product end. The end of the second lever away from the first lever has a second hook, and the side of the second hook near the upper mold plate has a second inclined surface that engages with the first inclined surface of the pull rod's first hook. This allows for the placement of the return mechanism in a suitable location within the mold system when the mold system has many and complex mechanisms, and the return mechanism, along with other mechanisms in the system, makes reasonable use of the mold space. [Attached Image Description]

[0016] Figure 1 This is a schematic diagram of the mold return mechanism of the present invention during mold opening.

[0017] Figure 2 This is a schematic diagram of the structure of a mold return mechanism of the present invention when the first inclined surface of the first hook of the pull rod contacts the second inclined surface of the second hook of the second lever during the mold closing process.

[0018] Figure 3 yes Figure 2 Cross-sectional view of AA.

[0019] Figure 4 This is a schematic diagram of the mold return mechanism of the present invention during mold closing.

[0020] Figure 5 yes Figure 4 Cross-sectional view of BB in the middle.

[0021] Figure 6 yes Figure 4 Cross-sectional view of CC.

[0022] Figure 7 This is a schematic diagram of the positioning component, pull rod, and lever module in this invention.

[0023] Figure 8 This is a schematic diagram of the lever module in this invention.

[0024] Figure 9 This is an exploded view of the connecting module connecting the first lever in this invention.

[0025] Figure 10 This is a schematic diagram of the structure of the pull rod inside the connecting seat in this invention.

Detailed Implementation Methods

[0026] To further illustrate the technical means and effects of the present invention, the following detailed description is provided in conjunction with the embodiments of the present invention and their accompanying drawings.

[0027] This invention provides a mold return mechanism, comprising:

[0028] The upper template 110 is fixedly connected to the upper mold core 120 and the connecting seat 130 on the side of the upper template 110 near the lower template 210. The connecting seat 130 is movably connected to the pull rod 140 through the first elastic element 131. The pull rod 140 is rotatably connected to the connecting seat 130 on the side near the connecting seat 130 through the first rotating element 132. The pull rod 140 is provided with a clearance groove 141 and a first hook 142 on the side away from the connecting seat 130. The first hook 142 is provided with a first inclined surface 143 on the side near the lower template 210.

[0029] The lower mold plate 210 has a lower mold core 220 fixedly connected to the side of the lower mold plate 210 near the upper mold core 120. The lower mold core 220 and the upper mold core 120 cooperate to form the product. A lever module 230 is provided on the side of the lower mold plate 210 near the lower mold core 220. The lever module 230 has at least one set of first levers 240 and at least one set of second levers 250. The first levers 240 and second levers 250 are intersecting and connected by a connecting module 260. The first levers 240 and second levers 250 have a first support 241 and a second support 251 respectively on the side of the first levers 240 and second levers 250 near the lower mold plate 210. Both the first support 241 and the second support 251 are fixedly connected to the lower mold plate 210. Within 10, the fulcrum positions of the first lever 240 and the second lever 250 are rotatably connected to the first support 241 and the second support 251 respectively via the second rotating member 242 and the third rotating member 252. The end of the first lever 240 away from the second lever 250 is provided with a positioning member 270. The positioning member 270 extends through the lower mold core 220 to the product end and is movably disposed within the lower mold core 220. The positioning member 270 is used for positioning and ejecting the product. The end of the second lever 250 away from the first lever 240 is provided with a second hook 253. The side of the second hook 253 near the upper mold plate 110 is provided with a second inclined surface 254. The second inclined surface 254 cooperates with the first inclined surface 143 of the first hook 142 of the pull rod 140.

[0030] The first elastic element 131 includes, but is not limited to, a spring.

[0031] The pull rod 140 has a fixing hole 144 on the side that contacts the first rotating member 132. A fixing member 145 is fixedly connected in the fixing hole 144. The fixing member 145 passes through the fixing hole 144 and presses against the first rotating member 132 to prevent the first rotating member 132 from falling out of the pull rod 140. The fixing member 145 includes, but is not limited to, a screw.

[0032] The connecting module 260 includes a movable block 261. The movable block 261 has a rotating structure 262 on the side near the first lever 240. The rotating structure 262 has a limiting groove 263 on the side near the first lever 240. The movable block 261 is rotatably connected to the first lever 240 in the limiting groove 263 via a first connector 264. The movable block 261 is fixedly connected to the second lever 250 via a second connector 265 on the side near the second lever 250. The movable block 261 is used to rotatably connect the second lever 250 in different directions to the first lever 240. The first connector 264 includes, but is not limited to, a spring pin. The spring pin can achieve self-locking to prevent the pin from falling out after insertion. The second connector 265 includes, but is not limited to, a pin.

[0033] The first rotating member 132, the second rotating member 242 and the third rotating member 252 include, but are not limited to, rotating shafts.

[0034] The positioning element 270 includes, but is not limited to, a positioning pin.

[0035] The first lever 240 is provided with a positioning member 270. On the side away from the upper template 110, a second elastic member 271 is provided. The second elastic member 271 is used to assist the positioning member 270 in returning to its original position. The second elastic member 271 includes, but is not limited to, a spring.

[0036] The working process of this invention is as follows:

[0037] When the mold is closed, the lower mold plate 210 moves relative to the upper mold plate 110. After the positioning member 270 in the lower mold plate 210 contacts the upper mold core 120 in the upper mold plate 110, the positioning member 270 presses down the first lever 240 under the action of the upper mold core 120. This causes the connecting module 260 at the other end of the first lever 240 to be lifted up under the action of the first support 241. The connecting module 260, through the second support 251, presses down the side of the second lever 250 with the second hook 253. At the same time, the pull rod 140 in the upper mold plate 110 moves relative to the lower mold plate 210. When the second lever 250 moves within 10, and the first inclined surface 143 of the first hook 142 of the pull rod 140 contacts the second inclined surface 254 of the second hook 253 of the second lever 250, the pull rod 140 rotates along the first rotating part 132 under the action of the first elastic element 131, so that the first inclined surface 143 of the first hook 142 of the pull rod 140 moves along the second inclined surface 254 of the second hook 253 of the second lever 250 until the mold is completely closed, the second hook 253 of the second lever 250 is located in the clearance groove 141 of the pull rod 140;

[0038] When the mold opens, the lower mold plate 210 moves relative to the upper mold plate 110. When the second hook 253 of the second lever 250 inside the lower mold plate 210 moves to the first hook 142 of the pull rod 140, the pull rod 140 rotates along the first rotating member 132 under the action of the first elastic member 131. At the same time, with the cooperation of the first hook 142 of the pull rod 140 and the second hook 253 of the second lever 250, the first hook 142 of the pull rod 140 pulls the end of the second hook 253 of the second lever 250 towards the end closer to the product, so that under the action of the second support 251, the second lever 250... The connecting module 260 at the other end is pressed down, and the connecting module 260 lifts the side of the first lever 240 with the positioning element 270 through the first support 241, thereby completing the ejection of the product until the positioning element 270 returns to its original position. The first hook 142 of the pull rod 140 and the second hook 253 of the second lever 250 cooperate to reach the limit position. Under the action of the mold opening pull of the machine, the pull rod 140 rotates along the first rotating element 132 under the action of the first elastic element 131 until its first hook 142 exits into the second hook 253 of the second lever 250. Then, after the mold is fully opened, the product is taken out.

[0039] The beneficial effects of this invention are as follows: This invention provides a mold return mechanism, which employs a pull rod 140 movably connected within the upper mold plate 110 via a first elastic element 131 and a first rotating element 132. The pull rod 140 has a clearance groove 141 and a first hook 142 on the side away from the upper mold plate 110, and a first inclined surface 143 on the side of the first hook 142 near the lower mold plate 210. Furthermore, the lower mold plate 210 contains a first lever 240 and a second lever 250, which are intersecting and connected via a connecting module 260. The fulcrum positions of the first lever 240 and the second lever 250 are respectively connected by a second rotating element. Part 242 and the third rotating part 252 are rotatably connected inside the lower template 210. The end of the first lever 240 away from the second lever 250 is provided with a positioning part 270. The positioning part 270 extends through the lower mold core 220 to the product end. The end of the second lever 250 away from the first lever 240 is provided with a second hook 253. The side of the second hook 253 near the upper template 110 is provided with a second inclined surface 254. The second inclined surface 254 cooperates with the first inclined surface 143 of the first hook 142 of the pull rod 140. In this way, when there are many and complex mold system mechanisms, the return mechanism can be arranged in a suitable position in the mold system using the mechanism of the present invention. The return mechanism and other mechanisms in the system make reasonable use of the mold space.

[0040] It should be noted that the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made by those skilled in the art to the above embodiments based on the technical solutions of the present invention shall fall within the protection scope of the present invention.

Claims

1. A mold return mechanism, comprising an upper mold plate (110) and a lower mold plate (210), wherein an upper mold core (120) is provided in the upper mold plate (110), and a lower mold core (220) is provided in the lower mold plate (210), wherein the lower mold core (220) and the upper mold core (120) cooperate to form a product, characterized in that: The upper template (110) is movably connected to the pull rod (140) on the side near the lower template (210) via a first elastic element (131). The pull rod (140) is rotatably connected to the upper template (110) on the side near the upper template (110) via a first rotating element (132). The pull rod (140) is provided with a clearance groove (141) and a first hook (142) on the side away from the upper template (110). The first hook (142) is provided with a first inclined surface (143) on the side near the lower template (210). The lower template (210) has a lever module (230) on the side near the upper template (110). The lever module (230) has at least one set of first levers (240) and at least one set of second levers (250). The first levers (240) and the second levers (250) are intersecting and connected by a connecting module (260). The fulcrum positions of the first levers (240) and the second levers (250) are respectively rotatably connected by a second rotating member (242) and a third rotating member (252). Inside the lower template (210), the first lever (240) is provided with a positioning element (270) at one end away from the second lever (250). The positioning element (270) extends through the lower mold core (220) to the product end and is movably disposed inside the lower mold core (220). The second lever (250) is provided with a second hook (253) at one end away from the first lever (240). The second hook (253) is provided with a second inclined surface (254) on the side near the upper template (110). The second inclined surface (254) cooperates with the first inclined surface (143).

2. A mold return mechanism as claimed in claim 1, characterized in that: The pull rod (140) is movably connected to the connecting seat (130) through the first elastic member (131) and the first rotating member (132), and the connecting seat (130) is fixedly connected to the upper template (110).

3. A mold return mechanism as claimed in claim 1, wherein: The lower template (210) has a first support (241) and a second support (251) fixedly connected at the fulcrum positions of the first lever (240) and the second lever (250), respectively. The first lever (240) and the second lever (250) are rotatably connected in the first support (241) and the second support (251) through the second rotating member (242) and the third rotating member (252), respectively.

4. A mold return mechanism as claimed in claim 1, wherein: The pull rod (140) has a fixing hole (144) on the side that contacts the first rotating member (132). A fixing member (145) is fixedly connected in the fixing hole (144). The fixing member (145) passes through the fixing hole (144) and rests on the first rotating member (132).

5. A mold return mechanism as claimed in claim 4, characterized in that: The fastener (145) is a screw.

6. A mold return mechanism as claimed in claim 1 wherein: The connecting module (260) includes a movable block (261). The movable block (261) has a rotating structure (262) on the side near the first lever (240). The rotating structure (262) has a limiting groove (263) on the side near the first lever (240). The movable block (261) is rotatably connected to the first lever (240) through the limiting groove (263) via the first connector (264). The movable block (261) is fixedly connected to the second lever (250) through the second connector (265) on the side near the second lever (250).

7. A mold return mechanism as claimed in claim 6, characterized in that: The first connector (264) is a spring pin, and the second connector (265) is a latch.

8. A mold return mechanism as described in claim 1, characterized in that: The first rotating component (132), the second rotating component (242), and the third rotating component (252) are rotating shafts.

9. A mold return mechanism as described in claim 1, characterized in that: The first lever (240) has a second elastic element (271) on the side away from the upper template (110) where the positioning element (270) is located.

10. A mold return mechanism as described in claim 1, characterized in that: The positioning element (270) is a positioning pin.

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