High-precision injection molding part mold and using method thereof

Abstract

The invention relates to the related technical field of injection molding part molds, and discloses a high-precision injection molding part mold and a using method thereof, and the high-precision injection molding part mold comprises a lower fixing seat. Through the structural design of a first sliding groove and a second sliding groove which are communicated in a first mold core fixing plate and a second mold core fixing plate, during demolding, water is injected into the first sliding groove for pressurization, a first piston plate reaches a through hole, the water pressure in the second sliding groove is increased, a second piston plate drives an insertion rod to move upwards to be separated from a separation block, and the mold core fixing plate and the second mold core fixing plate are separated from each other; injected water directly acts on the mold adhered to the second mold core fixing plate through the partition block, so that the mold is separated from the second mold core fixing plate, and compared with an existing conventional mode that the mold is ejected by an ejector pin, the problems that the surface of the mold is damaged by the ejector pin and the quality of the mold is influenced are avoided; and the second sliding groove is blocked by the inserting rod and the partition block, the sealing effect of the injection molding cavity cannot be affected, and it is guaranteed that the quality of the mold during injection molding is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field related to injection molds, and in particular to a high-precision injection mold and a use method thereof. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. In short, molds are tools used to make molded objects. Injection molds are equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting materials. Injection molds are widely used in the compression molding or injection molding of engineering plastics, rubber, ceramics and other products. Injection molds have specific contours or inner cavity shapes, and the inner cavity shape can be used to make the blank obtain the corresponding three-dimensional shape.

[0003] The existing injection mold uses positioning guide pins to match the front mold core and the rear mold core of the mold together. Once the front mold core and the rear mold core are matched, they cannot move relative to each other. The mold will not fit together after being used for a period of time. At this time, the two mold cores cannot be adjusted, resulting in deformation of the shape of the injection molded product, inaccurate size and other problems. In order to solve such problems, a high-precision injection mold and a method for using the same are proposed. Summary of the invention

[0004] The present invention provides a high-precision injection mold and a method for using the same, which solve the problems in the above-mentioned background technology.

[0005] The present invention solves the technical problem by adopting the following technical solutions:

[0006] A high-precision injection mold, comprising a lower fixed seat, an isolation plate, a first mold core fixing plate, a second mold core fixing plate, and an upper fixed seat, wherein the isolation plate is fixedly mounted on the top of the lower fixed seat, the first mold core fixing plate is fixedly mounted on the top of the isolation plate, and the second mold core fixing plate is fixedly mounted on the bottom of the upper fixed seat, a casting port is fixedly sleeved on the middle part of the upper fixed seat, and the bottom end of the casting port extends to the bottom of a cooling water tank, an injection cavity is reserved between the middle part of the second mold core fixing plate and the first mold core fixing plate, corresponding second slide grooves are respectively provided on both sides of the bottom of the second mold core fixing plate and on both sides of the top of the first mold core fixing plate, a partition block is fixedly sleeved at the notch of the second slide groove, a second spring is provided on the top of the inner cavity of the second slide groove, and the second spring The bottom end is fixedly connected with a second piston plate, the second piston plate is movably sleeved with the second slide groove, and the outer edge of the second piston plate fits with the inner wall of the second slide groove, one side of the bottom of the second piston plate is fixedly connected with a plug rod, the bottom end of the plug rod extends to the bottom of the dividing block, and the bottom surface of the plug rod is flush with the bottom surface of the dividing block, the plug rod is movably sleeved with the dividing block, and the outer edge of the plug rod fits with the inner wall of the dividing block, the second mold core fixing plate and the first mold core fixing plate are both provided with a first slide groove on both sides, and the first slide groove is communicated with the second slide groove, the top and bottom of one side of the first slide groove are provided with a through hole located on the second mold core fixing plate, the first slide groove is movably sleeved with the first piston plate located at the through hole, and the outer edge of the first piston plate fits with the inner wall of the first slide groove.

[0007] Preferably, a linkage plate is fixedly connected to the middle of the side of the first piston plate, one end of the linkage plate is fixedly connected to a baffle located in the inner cavity of the second slide groove, and a slot located at the baffle is opened in the middle of the linkage plate, and the slot is movably connected to the insertion rod.

[0008] Preferably, a first spring is fixedly connected to the side surface of the baffle, and one end of the first spring is in contact with the inner wall of the second sliding groove.

[0009] Preferably, one-way valve tubes located at the first slide groove are provided on both sides of the first mold core fixing plate and the second mold core fixing plate.

[0010] Preferably, the second mold core fixing plate is provided with cooling water grooves located on both sides of the casting port, and the cooling water grooves in the second mold core fixing plate are communicated with each other, and the first mold core fixing plate is provided with cooling water grooves located on both sides and below the injection cavity, and the cooling water grooves in the first mold core fixing plate are communicated with each other.

[0011] Preferably, the right side width of the slot is greater than the left side width, and two blocks located at the bottom of the linkage plate are fixedly connected to the insertion rod, the spacing between the outer edges of the two blocks is greater than the width of the left side of the slot, and the spacing between the outer edges of the two blocks is less than the width of the right side of the slot.

[0012] Preferably, a limiting axis is fixedly connected to the top of the inner cavity of the second slide groove, and the height of the limiting axis is greater than the height of the dividing block.

[0013] A high-precision injection mold and a method for using the same, comprising the following steps:

[0014] S1: Control the first mold core fixing plate and the second mold core fixing plate to fit together for mold closing;

[0015] S2: Inject molten raw materials into the injection cavity from the casting port until the molten material fills the injection cavity;

[0016] S3: After stopping the melt injection, circulating cooling water is injected through the cooling water tank to quickly dissipate heat;

[0017] S4: After the melt is cooled, the first mold core fixing plate is controlled to separate from the second mold core fixing plate, and the mold adhered to the first mold core fixing plate or the second mold core fixing plate is demoulded by water injection.

[0018] The advantages and positive effects of the present invention are: through the structural design of the first slide groove and the second slide groove communicated in the first mold core fixing plate and the second mold core fixing plate, when demolding, water is injected into the first slide groove to increase the pressure, so that the first piston plate reaches the through hole, so that the water pressure in the second slide groove is increased, and the second piston plate drives the insertion rod to move upward and separate from the partition block. The injected water directly acts on the mold adhered to the second mold core fixing plate through the partition block, so that the mold is separated from the second mold core fixing plate. Compared with the existing conventional ejector pin ejection method, the ejector pin avoids damaging the surface of the mold and affecting the quality of the mold. At the same time, during injection molding, the insertion rod and the partition block block the second slide groove, which will not affect the sealing effect of the injection molding cavity, thereby ensuring that the quality of the mold during injection molding is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 yes Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0022] Figure 3 yes Figure 1 Schematic diagram of the structure of the intermediate linkage plate;

[0023] The symbols in the accompanying drawings are described as follows:

[0024] 1. Lower fixing seat; 10. Separator block;

[0025] 2. Isolation board;

[0026] 3. The first mold core fixing plate;

[0027] 4. Second mold core fixing plate;

[0028] 5. Upper fixed seat;

[0029] 6. Casting mouth;

[0030] 7. Cooling water tank;

[0031] 8. first slide groove; 801. first piston plate; 802. linkage plate; 8021. clamping groove; 803. baffle plate; 804. first spring;

[0032] 9. Second slide groove; 901. Second spring; 902. Second piston plate; 903. Insert rod; 904. Stop block; 905. Limiting shaft. DETAILED DESCRIPTION

[0033] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0034] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0035] Reference Figure 1 and Figure 2 as well as Figure 3As shown, molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. In short, molds are tools used to make molded objects. Injection molds are equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting materials. Injection molds are widely used in the compression molding or injection molding of engineering plastics, rubber, ceramics and other products. Injection molds have specific contours or inner cavity shapes. The inner cavity shape can be used to make the blank obtain a corresponding three-dimensional shape. Existing injection molds use positioning guide pins to match the front mold core and the rear mold core of the mold together. Once matched, the front mold core and the rear mold core cannot move relative to each other. After a period of use, the mold will have a mismatch problem. At this time, the two mold cores cannot be adjusted, resulting in injection products. The invention relates to a high-precision injection mold and a method for using the same, which comprises a lower fixed seat 1, an isolation plate 2, a first mold core fixing plate 3, a second mold core fixing plate 4, and an upper fixed seat 5. The isolation plate 2 is fixedly mounted on the top of the lower fixed seat 1, the first mold core fixing plate 3 is fixedly mounted on the top of the isolation plate 2, and the second mold core fixing plate 4 is fixedly mounted on the bottom of the upper fixed seat 5. The middle part of the upper fixed seat 5 is fixedly sleeved with a casting port 6, and the bottom end of the casting port 6 extends to the bottom of the cooling water tank 7. The middle parts of the second mold core fixing plate 4 and the first mold core fixing plate 3 are fixedly mounted on the top of the isolation plate 2. The second mold core fixing plate 4 and the first mold core fixing plate 3 are fixedly mounted on the bottom of the upper fixed seat 5. An injection cavity is reserved between the two sides, and corresponding second slide grooves 9 are respectively provided on both sides of the bottom of the second mold core fixing plate 4 and on both sides of the top of the first mold core fixing plate 3. A partition block 10 is fixedly mounted at the notch of the second slide groove 9. A second spring 901 is provided on the top of the inner cavity of the second slide groove 9. The bottom end of the second spring 901 is fixedly connected to a second piston plate 902. The second piston plate 902 is movably sleeved with the second slide groove 9, and the outer edge of the second piston plate 902 is in contact with the inner wall of the second slide groove 9. A plug rod 903 is fixedly connected to one side of the bottom of the second piston plate 902. The bottom end of the plug rod 903 The insert rod 903 extends to the bottom of the partition block 10, and the bottom surface of the insert rod 903 is flush with the bottom surface of the partition block 10. The insert rod 903 is movably sleeved with the partition block 10, and the outer edge of the insert rod 903 fits with the inner wall of the partition block 10. The second mold core fixing plate 4 and the first mold core fixing plate 3 are both provided with a first slide groove 8 on both sides, and the first slide groove 8 is communicated with the second slide groove 9. The top and bottom of one side of the first slide groove 8 are both provided with a through hole located on the second mold core fixing plate 4. The first slide groove 8 is movably sleeved with a first piston plate 801 located at the through hole, and the outer edge of the first piston plate 801 fits with the inner wall of the first slide groove 8.Through the structural design of the first chute and the second chute communicated in the first mold core fixing plate and the second mold core fixing plate, during demoulding, water is injected into the first chute to increase the pressure, so that the first piston plate reaches the through hole, so that the water pressure in the second chute increases, and the second piston plate drives the plunger to move upward and separate from the partition block. The injected water directly acts on the mold adhered to the second mold core fixing plate through the partition block, so that the mold is separated from the second mold core fixing plate. Compared with the existing conventional ejector pin ejection method, the ejector pin avoids damage to the surface of the mold and affects the quality of the mold. At the same time, during injection molding, the plunger and the partition block block the second chute, which will not affect the sealing effect of the injection molding cavity, ensuring that the quality of the mold during injection molding is not affected. ;

[0036] It should be noted that one end of the linkage plate 802 is fixedly connected to a baffle 803 located in the inner cavity of the second slide groove 9, and a slot 8021 located at the baffle 803 is opened in the middle of the linkage plate 802, and the slot 8021 is movably sleeved with the insertion rod 903, and the side of the baffle 803 is fixedly connected to a first spring 804, one end of the first spring 804 is in contact with the inner wall of the second slide groove 9, the first core fixing plate 3 and the second core fixing plate 4 are formed by mold injection, and then the second spring 901, the second piston plate 902, and the insertion rod 903 are placed in the notch of the second slide groove 9 at the bottom of the second core fixing plate 4, and in the second slide groove 9, and then the first spring 804, the baffle plate 803, the linkage plate 802, and the first piston plate 801 as a whole are placed from the side of the first slide groove 8, and the first spring 804 contacts the inner wall of the second slide groove 9, so as to facilitate the assembly of the injection mold as a whole, and then facilitate the production and assembly of the injection mold without damage to the demolding. Both sides of the first mold core fixing plate 3 and the second mold core fixing plate 4 are provided with a one-way valve tube located at the first slide groove 8. After the first mold core fixing plate 3 and the second mold core fixing plate 4 are in contact with each other and the mold is closed, the injection molding melt is injected into the injection cavity through the casting port 6. At this time, the plug rod 903 and the partition block 10 block the second slide groove. Groove 9 is used to ensure that the quality of the injection mold is not affected. After the injection molten material fills the injection cavity, circulating cooling water is injected through the cooling water tank 7 to cool the molten material. When the first mold core fixing plate 3 and the second mold core fixing plate 4 are separated and demoulded, when the mold adheres to the second mold core fixing plate 4, cold water is injected through the one-way valve pipe mouths on both sides of the second mold core fixing plate 4, so that the water pressure in the first slide groove 8 increases, and the first piston plate 801 is pushed to move left. The first piston plate 801 moves to the through hole, and water enters the second slide groove 9. As the water pressure in the second slide groove 9 increases, the second piston plate 902 moves up, thereby driving the insertion rod 903 to move up, so that The insert rod 903 is separated from the partition block 10, and the injected water directly acts on the mold adhered to the second core fixing plate 4 through the partition block 10, and as the water pressure increases, the mold is separated from the second core fixing plate 4. Compared with the existing conventional ejector pin ejection method, it avoids the problem of the ejector pin causing damage to the surface of the mold and affecting the quality of the mold. At the same time, it will not affect the sealing effect of the injection cavity, ensuring that the quality of the mold during injection molding is not affected. When the mold is adhered to the first core fixing plate 3, cold water is injected into the one-way valve pipe mouth on both sides of the first core fixing plate 3 in the above manner, so that the mold and the first core fixing plate 3 can be separated without damage to achieve demolding.

[0037] Furthermore, the second core fixing plate 4 is provided with cooling water grooves 7 located on both sides of the casting port 6, and the cooling water grooves 7 in the second core fixing plate 4 are communicated with each other, the first core fixing plate 3 is provided with cooling water grooves 7 located on both sides and below the injection cavity, and the cooling water grooves 7 in the first core fixing plate 3 are communicated with each other, after the injection cavity is filled with molten material, circulating cooling water is injected into the cooling water grooves 7, thereby improving the heat dissipation efficiency of the injection mold and further improving the injection efficiency of the mold.

[0038] It should also be noted that the right width of the slot 8021 is greater than the left width, and the insertion rod 903 is fixedly connected with two blocks 904 located at the bottom of the linkage plate 802. The spacing between the outer edges of the two blocks 904 is greater than the width of the left side of the slot 8021, and the spacing between the outer edges of the two blocks 904 is less than the width of the right side of the slot 8021. During mold injection, the block 904 limits the molten material in the injection cavity when it is injected from the casting port 6. This ensures that the molten material in the injection cavity can be filled, thereby ensuring the integrity of the mold injection, and further ensuring the quality of the injection mold. After the injection mold is cooled, water is injected into the first slide groove 8 and the second slide groove 9 to perform damage-free demoulding. After the mold is separated from the first core fixing plate 3 or the second core fixing plate 4, the water pressure in the second slide groove 9 disappears, and under the elastic force of the second spring 901, the second piston plate 902 is reset and moved, so that the insertion rod 903 is inserted into the partition block 10, and the injection of water is canceled at the same time. Under the elastic force of the first spring 804, the first piston plate 801 is reset to block the through hole. At this time, the block 904 is reset to block the insertion rod 903, so that the injection quality of the mold will not be affected during the next injection.

[0039] Furthermore, the top of the inner cavity of the second slide groove 9 is fixedly connected with a limiting shaft 905, and the height value of the limiting shaft 905 is greater than the height value of the partition block 10. When water injection and demolding are performed, the water pressure in the second slide groove 9 increases, causing the second piston plate 902 to move upward and be limited by the limiting shaft 905 to prevent the second spring 901 from being over-compressed for a long time, thereby ensuring the service life of the second spring 901, and further ensuring that the injection mold can be effectively demolded without damage for a long time.

[0040] It should be noted that the above usage steps specifically include:

[0041] S1: Control the first mold core fixing plate 3 and the second mold core fixing plate 4 to fit together for mold closing;

[0042] S2: injecting molten raw material into the injection cavity from the casting port 6 until the molten material fills the injection cavity;

[0043] S3: After the melt injection is stopped, circulating cooling water is injected through the cooling water tank 7 to quickly dissipate heat;

[0044] S4: After the melt is cooled, the first mold core fixing plate 3 is controlled to separate from the second mold core fixing plate 4, and the mold adhered to the first mold core fixing plate 3 or the second mold core fixing plate 4 is demoulded by water injection.

[0045] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, and therefore the present invention is not limited to the embodiments described in the specific implementation manners. Any other implementation manners derived by those skilled in the art based on the technical solutions of the present invention also fall within the scope of protection of the present invention.

Claims

1. A high-precision injection mold, comprising a lower fixed seat (1), an isolation plate (2), a first mold core fixing plate (3), a second mold core fixing plate (4), and an upper fixed seat (5), wherein the isolation plate (2) is fixedly mounted on the top of the lower fixed seat (1), the first mold core fixing plate (3) is fixedly mounted on the top of the isolation plate (2), and the second mold core fixing plate (4) is fixedly mounted on the bottom of the upper fixed seat (5), characterized in that: The middle part of the upper fixed seat (5) is fixedly sleeved with a casting port (6), and the bottom end of the casting port (6) extends to the bottom of the cooling water tank (7). An injection cavity is reserved between the middle parts of the second mold core fixing plate (4) and the first mold core fixing plate (3). The two sides of the bottom of the second mold core fixing plate (4) and the two sides of the top of the first mold core fixing plate (3) are respectively provided with corresponding second slide grooves (9). The notch of the second slide groove (9) is fixedly sleeved with a partition block (10). The top of the inner cavity of the second slide groove (9) is provided with a second spring (901). The bottom end of the second spring (901) is fixedly connected with a second piston plate (902). The second piston plate (902) is movably sleeved with the second slide groove (9), and the outer edge of the second piston plate (902) is in contact with the inner wall of the second slide groove (9). The second piston A plug rod (903) is fixedly connected to one side of the bottom of the plate (902), the bottom end of the plug rod (903) extends to the bottom of the partition block (10), and the bottom surface of the plug rod (903) is flush with the bottom surface of the partition block (10), the plug rod (903) is movably sleeved with the partition block (10), and the outer edge of the plug rod (903) fits with the inner wall of the partition block (10), the second mold core fixing plate (4) and the first mold core fixing plate (3) are both provided with a first slide groove (8) on both sides, and the first slide groove (8) is communicated with the second slide groove (9), the top and bottom of one side of the first slide groove (8) are both provided with a through hole located on the second mold core fixing plate (4), the first slide groove (8) is movably sleeved with a first piston plate (801) located at the through hole, and the outer edge of the first piston plate (801) fits with the inner wall of the first slide groove (8).

2. A high-precision injection mold according to claim 1, characterized in that: A linkage plate (802) is fixedly connected to the middle of the side of the first piston plate (801), one end of the linkage plate (802) is fixedly connected to a baffle plate (803) located in the inner cavity of the second slide groove (9), and a clamping groove (8021) located at the baffle plate (803) is opened in the middle of the linkage plate (802), and the clamping groove (8021) is movably connected to the insertion rod (903).

3. A high-precision injection mold according to claim 2, characterized in that: A first spring (804) is fixedly connected to the side surface of the baffle (803), and one end of the first spring (804) is in contact with the inner wall of the second sliding groove (9).

4. A high-precision injection mold according to claim 3, characterized in that: One-way valve tubes located at the first slide groove (8) are provided on both sides of the first mold core fixing plate (3) and the second mold core fixing plate (4).

5. A high-precision injection mold according to claim 2, characterized in that: The second mold core fixing plate (4) is provided with cooling water grooves (7) located on both sides of the casting port (6), and the cooling water grooves (7) in the second mold core fixing plate (4) are interconnected; the first mold core fixing plate (3) is provided with cooling water grooves (7) located on both sides and below the injection cavity, and the cooling water grooves (7) in the first mold core fixing plate (3) are interconnected.

6. A high-precision injection mold according to claim 2, characterized in that: The right side width of the slot (8021) is greater than the left side width, and the insertion rod (903) is fixedly connected with two blocks (904) located at the bottom of the linkage plate (802), the spacing between the outer edges of the two blocks (904) is greater than the width of the left side of the slot (8021), and the spacing between the outer edges of the two blocks (904) is less than the width of the right side of the slot (8021).

7. A high-precision injection mold according to claim 1, characterized in that: A limiting axis (905) is fixedly connected to the top of the inner cavity of the second slide groove (9), and the height of the limiting axis (905) is greater than the height of the partition block (10).

8. The method for using a high-precision injection mold according to any one of claims 1 to 7, characterized in that: The steps include: S1: Controlling the first mold core fixing plate (3) and the second mold core fixing plate (4) to fit together for mold closing; S2: injecting molten raw material into the injection cavity from the casting port (6) until the molten material fills the injection cavity; S3: After the melt injection is stopped, circulating cooling water is injected through the cooling water tank (7) to quickly dissipate heat; S4: After the melt is cooled, the first mold core fixing plate (3) and the second mold core fixing plate (4) are controlled to separate, and the mold adhered to the first mold core fixing plate (3) or the second mold core fixing plate (4) is demoulded by water injection.

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