Lower die floating differential pressure mold structure

Abstract

The utility model discloses a lower mould floating type differential pressure mould structure belongs to differential pressure mould technical field, aiming at the problem of poor cooling effect, low cooling efficiency and manual product, easy to damage mould, including bottom plate, floating mechanism, guide rod, top plate, air cylinder, connecting plate, upper mould and lower mould mechanism, the floating mechanism sets up the top of bottom plate, the guide rod sets up the top of floating mechanism, the top plate fixed connection is in the top of guide rod, the air cylinder fixed connection is in the top of top plate, the connecting plate sliding connection is in the outside of guide rod, the utility model discloses the floating mechanism of setting, spring and floating plate cooperation provide elastic buffer when closing mould, avoid the direct rigid impact of upper mould and lower mould, reduce mould abrasion, effectively prolong the overall service life of mould, through setting lower mould mechanism, only need to rotate handle to realize the ejection of ejector pin, do not need complex power device, convenient operation.

Description

Technical Field

[0001] This utility model belongs to the field of differential pressure forming mold technology, specifically relating to a floating lower mold differential pressure mold structure. Background Technology

[0002] In the field of injection molding, traditional fixed mold structures often struggle to meet the demands for high precision and efficiency in products with deep cavities, side recesses, or complex curved surfaces. Differential pressure molding technology, particularly mold structures utilizing pneumatic or hydraulic pressure as a power source, has emerged as a key technology for molding such complex products. Its basic principle involves creating pressure differences at different points within the mold cavity, causing the moving parts of the mold (such as the lower mold) to undergo precise displacement under controllable external forces, thereby completing a series of actions including mold closing, injection molding, mold opening, and product demolding.

[0003] The cooling system design of existing molds is relatively traditional. Cooling channels are usually machined into the fixed mold core or template by drilling. For the movable mold core that floats with the lower mold, the cooling water is usually connected flexibly by a simple sealing ring. The imperfect flow channel design can easily create cooling dead zones, resulting in uneven surface temperature of the mold cavity and inconsistent cooling rates in different parts of the product. This not only prolongs the necessary cooling and holding time and reduces the production cycle, but also easily leads to quality defects such as warping, shrinkage marks, and excessive internal stress in the product. Moreover, in the demolding process, although the floating lower mold provides a certain demolding space, for some products with high clamping force and fragile structure, production personnel must use tools or directly reach into the mold to forcibly pry or remove the product from the mold core, which can easily damage the mold or the product.

[0004] Therefore, a floating differential pressure mold structure is needed to solve the problems of poor cooling effect, low cooling efficiency, and easy damage to the mold when manually removing the product in the existing technology. Utility Model Content

[0005] The purpose of this invention is to provide a floating lower mold differential pressure mold structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a floating differential pressure mold structure, comprising a base plate, a floating mechanism, a guide rod, a top plate, a cylinder, a connecting plate, an upper mold, and a lower mold mechanism. The floating mechanism is disposed above the base plate, the guide rod is disposed above the floating mechanism, the top plate is fixedly connected to the top of the guide rod, the cylinder is fixedly connected to the top of the top plate, the connecting plate is slidably connected to the outside of the guide rod, and the output end of the cylinder is fixedly connected to the connecting plate, the upper mold is fixedly connected to the bottom of the connecting plate, and the lower mold mechanism is disposed above the floating mechanism. A cooling mechanism is provided inside the lower mold mechanism.

[0007] It should be noted in the solution that the floating mechanism consists of a fixed column, a floating plate and a spring. The fixed column is symmetrically fixedly connected to the upper perimeter of the base plate. The floating plate is slidably connected to the outside of the fixed column. The spring is fixedly connected between the base plate and the floating plate and is sleeved on the outside of the fixed column. The guide rod is fixedly connected to the top of the fixed column.

[0008] It is worth further explaining that the lower mold mechanism consists of a lower mold, a lead screw, a handle, a moving block, a slider, a connecting rod, a moving plate, a limiting block, and an ejector pin. The lower mold is fixedly connected to the upper part of the floating plate. A lower mold cavity is opened at the upper part of the lower mold, and an installation cavity is provided below the lower mold cavity. The lead screw is threadedly connected to the left side of the installation cavity, the handle is fixedly connected to the left end of the lead screw, and the moving block is rotatably connected to the right end of the lead screw.

[0009] Furthermore, it should be noted that the slider is fixedly connected to the lower part of the moving block, and the bottom surface of the mounting cavity is provided with a groove that matches the slider.

[0010] In a preferred embodiment, one end of the connecting rod is rotatably connected to the top of the moving block, the moving plate is rotatably connected to the other end of the connecting rod, the limiting blocks are symmetrically fixedly connected to the left and right sides of the moving plate, and the interior of the mounting cavity is symmetrically provided with limiting grooves that are adapted to the limiting blocks.

[0011] In a preferred embodiment, the ejector pins are uniformly and fixedly connected above the moving plate, and a through hole is provided between the lower mold cavity and the mounting cavity for the ejector pins to pass through.

[0012] In a preferred embodiment, the cooling mechanism consists of a cooling chamber, a water inlet pipe, heat dissipation fins, and a water outlet pipe. The cooling chamber is provided outside the lower mold cavity. The water inlet pipe is fixedly connected to the front left side of the cooling chamber, and the water outlet pipe is fixedly connected to the front left side of the cooling chamber.

[0013] In a preferred embodiment, the heat dissipation fins are uniformly and fixedly connected to the inside of the cooling cavity, and the heat dissipation fins are uniformly and alternately arranged.

[0014] Compared with the prior art, the floating lower mold differential pressure mold structure provided by this utility model has at least the following beneficial effects:

[0015] (1) By setting a floating mechanism, the spring and floating plate work together to provide elastic buffer when the mold is closed, avoiding direct rigid impact between the upper mold and the lower mold, reducing mold wear, and effectively extending the overall service life of the mold.

[0016] (2) With the set lower mold mechanism, the ejector pins can be ejected and demolded by simply turning the handle. No complicated power device is required, and the operation is convenient. The uniform distribution of ejector pins can ensure that the product is subjected to balanced force and avoid product deformation during demolding.

[0017] (3) The cooling mechanism is designed so that the cooling chamber surrounds the lower mold cavity and the heat dissipation fins are arranged in an interlaced manner inside, which greatly increases the heat dissipation area. When the coolant flows between the heat dissipation fins, it can fully absorb heat, accelerate the cooling speed, shorten the molding cycle, and at the same time avoid product defects such as shrinkage marks and deformation due to uneven cooling, thus improving the product quality stability. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the lower mold mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the heat dissipation fin arrangement structure of this utility model.

[0022] In the diagram: 1. Base plate; 2. Floating mechanism; 3. Guide rod; 4. Top plate; 5. Cylinder; 6. Connecting plate; 7. Upper mold; 8. Lower mold mechanism; 9. Cooling mechanism; 201. Fixed column; 202. Floating plate; 203. Spring; 801. Lower mold; 802. Lower mold cavity; 803. Mounting cavity; 804. Lead screw; 805. Handle; 806. Moving block; 807. Slider; 808. Connecting rod; 809. Moving plate; 810. Limiting block; 811. Ejector pin; 901. Cooling cavity; 902. Water inlet pipe; 903. Heat dissipation fins; 904. Water outlet pipe. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments.

[0024] Please see Figure 1-4This utility model provides a floating differential pressure mold structure, including a base plate 1, a floating mechanism 2, a guide rod 3, a top plate 4, a cylinder 5, a connecting plate 6, an upper mold 7, and a lower mold mechanism 8. The floating mechanism 2 is located above the base plate 1, the guide rod 3 is located above the floating mechanism 2, the top plate 4 is fixedly connected to the top of the guide rod 3, the cylinder 5 is fixedly connected to the top of the top plate 4, the connecting plate 6 is slidably connected to the outside of the guide rod 3, and the output end of the cylinder 5 is fixedly connected to the connecting plate 6. The upper mold 7 is fixedly connected to the bottom of the connecting plate 6, and the lower mold mechanism 8 is located above the floating mechanism 2. A cooling mechanism 9 is provided inside the lower mold mechanism 8.

[0025] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that the floating mechanism 2 consists of a fixed column 201, a floating plate 202, and a spring 203. The fixed column 201 is symmetrically fixedly connected to the upper perimeter of the base plate 1. The floating plate 202 is slidably connected to the outside of the fixed column 201. The spring 203 is fixedly connected between the base plate 1 and the floating plate 202, and the spring 203 is sleeved on the outside of the fixed column 201. The guide rod 3 is fixedly connected to the top of the fixed column 201.

[0026] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that the lower mold mechanism 8 consists of a lower mold 801, a lead screw 804, a handle 805, a moving block 806, a slider 807, a connecting rod 808, a moving plate 809, a limiting block 810, and an ejector pin 811. The lower mold 801 is fixedly connected to the upper part of the floating plate 202. The lower mold cavity 802 is opened in the upper part of the lower mold 801. The mounting cavity 803 is provided below the lower mold cavity 802. The lead screw 804 is threadedly connected to the left side of the mounting cavity 803. The handle 805 is fixedly connected to the left end of the lead screw 804. The moving block 806 is rotatably connected to the right end of the lead screw 804. The slider 807 is fixedly connected to the lower part of the moving block 806. The bottom surface of the mounting cavity 803 is provided with a groove that matches the slider 807.

[0027] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that one end of the connecting rod 808 is rotatably connected to the top of the moving block 806, the moving plate 809 is rotatably connected to the other end of the connecting rod 808, the limiting block 810 is symmetrically fixedly connected to the left and right sides of the moving plate 809, the mounting cavity 803 is symmetrically provided with limiting grooves that are compatible with the limiting block 810, the ejector pin 811 is uniformly fixedly connected to the top of the moving plate 809, and a through hole is provided between the lower mold cavity 802 and the mounting cavity 803 for the ejector pin 811 to pass through.

[0028] Handle 805 drives lead screw 804 to rotate in mounting cavity 803. Lead screw 804 drives moving block 806 to move to the right along slide groove. Moving block 806 pushes moving plate 809 upward through connecting rod 808. Limiting block 810 slides along limiting groove to play a guiding and limiting role.

[0029] As can be seen from the above working process, by using the lower mold mechanism 8, the ejector pins 811 can be ejected and demolded simply by turning the handle 805. No complex power device is required, making the operation convenient. Furthermore, the even distribution of the ejector pins 811 ensures that the product is subjected to balanced force, thus preventing product deformation during demolding.

[0030] Further as Figure 1 , Figure 2 and Figure 4 As shown, it is worth noting that the cooling mechanism 9 consists of a cooling chamber 901, a water inlet pipe 902, heat dissipation fins 903, and a water outlet pipe 904. The cooling chamber 901 is provided on the outside of the lower mold cavity 802. The water inlet pipe 902 is fixedly connected to the front left side of the cooling chamber 901, and the water outlet pipe 904 is fixedly connected to the front left side of the cooling chamber 901.

[0031] Further as Figure 1 , Figure 2 and Figure 4 As shown, it is worth noting that the heat dissipation fins 903 are uniformly and fixedly connected to the inside of the cooling cavity 901, and the heat dissipation fins 903 are uniformly and staggered.

[0032] Coolant enters the cooling chamber 901 through the inlet pipe 902 and flows between the staggered heat dissipation fins 903; the heat generated during the molding process is conducted to the heat dissipation fins 903 through the lower mold 801, and the coolant absorbs the heat and flows out from the outlet pipe 904, thus achieving rapid cooling of the mold and the molded product.

[0033] The front left side of the cooling chamber 901 is not connected to the left front side. Coolant is introduced into the cooling chamber 901 through the water inlet pipe 902. The coolant flows through the heat dissipation fins 903 in sequence until it flows out through the water outlet pipe 904 on the left side. The heat inside the mounting cavity 803 is conducted to the heat dissipation fins 903, thereby removing the heat inside the mounting cavity 803.

[0034] The working process of this solution is as follows: When in use, cylinder 5 is started, and the output end of cylinder 5 pushes the connecting plate 6 to slide down along the guide rod 3. The connecting plate 6 drives the upper mold 7 below to descend synchronously. When the upper mold 7 contacts the lower mold 801, it continues to press down. The lower mold 801 drives the floating plate 202 to slide down along the fixed column 201. The spring 203 is compressed and generates an upward elastic force, forming a floating buffer effect until the upper mold 7 and the lower mold cavity 802 are completely closed, and the mold closing is completed.

[0035] After the mold is closed, the raw material is formed in the lower mold cavity 802 under differential pressure. Then, the coolant supply device is turned on, and the coolant enters the cooling cavity 901 through the water inlet pipe 902 and flows between the staggered heat dissipation fins 903. The heat generated during the molding process is conducted to the heat dissipation fins 903 through the lower mold 801. After the coolant absorbs the heat, it flows out from the water outlet pipe 904, realizing rapid cooling of the mold and the molded product.

[0036] After cooling, the control cylinder 5 drives the upper mold 7 to reset upwards; then the handle 805 of the lower mold mechanism 8 is rotated, the handle 805 drives the lead screw 804 to rotate in the mounting cavity 803, the lead screw 804 drives the moving block 806 to move to the right along the slide groove; the moving block 806 pushes the moving plate 809 upwards through the connecting rod 808, and the limiting block 810 slides along the limiting groove to play a guiding and limiting role; the moving plate 809 drives the ejector pin 811 to pass through the through hole and extend into the lower mold cavity 802 to eject the molded product and complete the demolding.

[0037] Remove the demolded product, turn the handle 805 in the opposite direction to reset the moving block 806 to the left, and the moving plate 809 and ejector pin 811 will descend back into the mounting cavity 803; at the same time, the floating plate 202 will be reset upward under the elastic force of the spring 203, and the mold will return to its initial state, ready for the next use.

[0038] In summary: The floating mechanism 2, spring 203, and floating plate 202 work together to provide elastic buffering during mold closing, preventing direct rigid impact between the upper mold 7 and the lower mold 801, reducing mold wear, and effectively extending the overall service life of the mold; the lower mold mechanism 8 allows for ejection of the ejector pins 811 simply by turning the handle 805, eliminating the need for complex power devices, making operation convenient, and the even distribution of the ejector pins 811 ensures balanced force on the product, preventing product deformation during demolding; the cooling mechanism 9 surrounds the lower mold cavity 802 with a cooling chamber 901, and the internal heat dissipation fins 903 are staggered, significantly increasing the heat dissipation area. When the coolant flows between the heat dissipation fins 903, it can fully absorb heat, accelerate the cooling speed, shorten the molding cycle, and at the same time avoid defects such as shrinkage marks and deformation caused by uneven cooling, thus improving product quality stability.

Claims

1. A floating differential pressure mold structure, comprising a base plate (1), a floating mechanism (2), a guide rod (3), a top plate (4), a cylinder (5), a connecting plate (6), an upper mold (7), and a lower mold mechanism (8), characterized in that: The floating mechanism (2) is located above the base plate (1), the guide rod (3) is located above the floating mechanism (2), the top plate (4) is fixedly connected to the top of the guide rod (3), the cylinder (5) is fixedly connected to the top of the top plate (4), the connecting plate (6) is slidably connected to the outside of the guide rod (3), and the output end of the cylinder (5) is fixedly connected to the connecting plate (6), the upper mold (7) is fixedly connected to the bottom of the connecting plate (6), the lower mold mechanism (8) is located above the floating mechanism (2), and the lower mold mechanism (8) is provided with a cooling mechanism (9) inside.

2. The floating lower mold differential pressure mold structure according to claim 1, characterized in that: The floating mechanism (2) consists of a fixed column (201), a floating plate (202) and a spring (203). The fixed column (201) is symmetrically fixedly connected to the upper periphery of the base plate (1). The floating plate (202) is slidably connected to the outside of the fixed column (201). The spring (203) is fixedly connected between the base plate (1) and the floating plate (202), and the spring (203) is sleeved on the outside of the fixed column (201). The guide rod (3) is fixedly connected above the fixed column (201).

3. The floating lower mold differential pressure mold structure according to claim 2, characterized in that: The lower mold mechanism (8) consists of a lower mold (801), a lead screw (804), a handle (805), a moving block (806), a slider (807), a connecting rod (808), a moving plate (809), a limiting block (810), and an ejector pin (811). The lower mold (801) is fixedly connected to the upper part of the floating plate (202). The lower mold (801) has a lower mold cavity (802) on its upper part. The lower mold cavity (802) has an installation cavity (803) below it. The lead screw (804) is threadedly connected to the left side of the installation cavity (803). The handle (805) is fixedly connected to the left end of the lead screw (804). The moving block (806) is rotatably connected to the right end of the lead screw (804).

4. The floating lower mold differential pressure mold structure according to claim 3, characterized in that: The slider (807) is fixedly connected to the lower part of the moving block (806), and the bottom surface of the mounting cavity (803) is provided with a groove that is compatible with the slider (807).

5. The floating lower mold differential pressure mold structure according to claim 4, characterized in that: One end of the connecting rod (808) is rotatably connected to the top of the moving block (806), the moving plate (809) is rotatably connected to the other end of the connecting rod (808), the limiting block (810) is symmetrically fixedly connected to the left and right sides of the moving plate (809), and the interior of the mounting cavity (803) is symmetrically provided with limiting grooves that are adapted to the limiting block (810).

6. The floating lower mold differential pressure mold structure according to claim 5, characterized in that: The ejector pins (811) are uniformly and fixedly connected above the moving plate (809), and a through hole is provided between the lower mold cavity (802) and the mounting cavity (803) for the ejector pins (811) to pass through.

7. The floating lower mold differential pressure mold structure according to claim 3, characterized in that: The cooling mechanism (9) consists of a cooling chamber (901), a water inlet pipe (902), heat dissipation fins (903), and a water outlet pipe (904). The cooling chamber (901) is provided outside the lower mold cavity (802). The water inlet pipe (902) is fixedly connected to the front left side of the cooling chamber (901), and the water outlet pipe (904) is fixedly connected to the left front end of the cooling chamber (901).

8. The floating differential pressure mold structure according to claim 7, characterized in that: The heat dissipation fins (903) are uniformly and fixedly connected to the inside of the cooling cavity (901), and the heat dissipation fins (903) are uniformly and alternately arranged.

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