Injection mold structure convenient for component adjustment

Abstract

The invention relates to the technical field of injection molds, in particular to an injection mold structure facilitating assembly adjustment. The die comprises a female die and a male die, a plurality of cavities are formed in the side, close to the male die, of the female die, a plurality of cores are integrally arranged on the side, close to the female die, of the male die, and each cavity is matched with the corresponding core; inserting grooves are formed in the two sides, away from each other, of the cavity, the inserting grooves penetrate through the upper portion and the lower portion of the female die, and limiting assemblies are slidably connected into the two inserting grooves; the fixing plate, the mounting plate and the pressing plate which are used for fixing the position of the gasket are additionally arranged, and no protruding part exists in the cavity. Relative to the cavity, the foreign matters are only a pair of substrates with gaskets, and the substrates with adjustable transverse thickness and inclined plane inclination angles are only used for adjusting the width of the cavity and the inclined plane inclination angles. And no gap is formed between the structures. Therefore, redundant burrs cannot be generated on the surface of a finally obtained plastic product due to the fact that the fixing structure of the gasket is additionally arranged.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and more specifically, to an injection mold structure that facilitates component adjustment. Background Technology

[0002] Injection molds are core equipment for mass production of plastic parts, and the adjustment of their components is a crucial step in ensuring product quality, production stability, and mold lifespan. During product development or after mass production, design changes may be made due to market demands, functional optimizations, etc. (such as local structural modifications, dimensional fine-tuning, and the addition of holes / ribs). Directly remanufacturing the mold would be costly and time-consuming, while adjusting the mold components can quickly adapt to changes and reduce modification costs.

[0003] Currently, by adding or removing shims within the mold cavity to correct key parameters such as the hole diameter and side angle, it is possible to eliminate the need for re-machining the cavity. After adding the shims, they need to be fixed to the mold using protruding structures such as inserts or bolts. However, these protruding structures create gaps with the inner wall of the cavity. When the molten plastic is injected between the core and the cavity, it flows into these gaps under its own expansion pressure. Upon cooling, this results in numerous burrs forming on the surface of the plastic product.

[0004] In view of this, we propose an injection mold structure that facilitates component adjustment in order to improve the shortcomings of the prior art. Summary of the Invention

[0005] This invention provides an injection mold structure that facilitates component adjustment, which solves the problem that when the gasket fixing structure forms a gap with the cavity, the molten plastic flowing into it easily forms a lot of burrs on the surface of the plastic product.

[0006] To achieve the above objectives, the injection mold structure that facilitates component adjustment includes a cavity and a punch. The cavity has multiple cavities on the side near the punch, and the punch has multiple cores integrally formed on the side near the cavity. Each cavity is adapted to each core.

[0007] Slots are provided on both sides of the cavity that are far apart from each other. The slots pass through the upper and lower parts of the die. Limiting components are slidably connected in both slots. The limiting components are inserted into the slots through the side of the die away from the cavity and contact the cavity.

[0008] A pair of gaskets are engaged inside the cavity. When the limiting component slides longitudinally to the maximum depth inside the slot, the gaskets slide laterally to the edge of the inner sidewall of the cavity and engage with the limiting component to fix the position of the gaskets in the longitudinal direction.

[0009] The pad includes a base plate and a hanging block. The shape and size of the hanging block remain constant, while the thickness and tilt angle of the base plate are adjustable in the lateral direction.

[0010] In the above technical solution, by maintaining a structure where the gasket is laterally slidable while longitudinally locked, after the cavity and core are molded and molten plastic is injected, the gasket adheres tightly to one side of the limiting component under the expansion force of the molten plastic. After cooling to form a plastic product, the mold is opened longitudinally along the concave and convex molds, and the core slides out of the cavity along the longitudinal direction. The plastic product also detaches from the cavity along with the core.

[0011] Because the plastic product is demolded longitudinally and the gasket is fixed in the longitudinal direction, meaning that no external force is applied to the gasket in the movable direction, the gasket remains in close contact with the side wall of the limiting component after the product is demolded.

[0012] Based on this, the slot has a pressure groove on the side closer to the cavity, and the slot has a limit groove on the two sides away from each other. The slot is located on the side adjacent to the pressure groove.

[0013] The limiting component includes a fixing plate that slides longitudinally into a slot, a pressure plate that is slidably connected in the groove, an mounting plate that is slidably connected in the fixing plate on the side near the cavity, and a pressure plate that is inserted into the groove to fix the top of the mounting plate and the gasket.

[0014] Limiting blocks are fixedly connected to the two opposite ends of the top of the fixed plate. The limiting blocks are inserted into the limiting groove to limit the position of the fixed plate in the longitudinal direction.

[0015] The mounting plate can slide to the bottom of the fixing plate and contact the inside of the cavity. The fixing plate has an inwardly opening mounting groove on the side near the cavity, and the mounting plate is slidably connected in the mounting groove.

[0016] A pair of anti-detachment bolts are fixedly installed at the bottom of the mounting groove. The bottom of the mounting plate has an anti-detachment groove that matches the anti-detachment bolts at the corresponding position. The anti-detachment bolts are locked into the anti-detachment grooves to prevent the mounting plate from sliding further down into the cavity.

[0017] This design allows for the insertion of a limiting component through the back of the die, and its position in the sliding direction (vertical direction) is fixed by a limiting groove. This prevents the limiting component from shifting due to the outward expansion of the molten plastic after high-temperature, high-pressure plastic melt is injected into the cavity.

[0018] In another technical solution, the bottom of the mounting plate is provided with multiple hanging slots. When the anti-detachment slot and the anti-detachment bolt are engaged, the top height of the hanging slot is lower than the height of the inner top wall of the cavity. The hanging block prevents itself from moving longitudinally by inserting into the hanging slot.

[0019] The thickness of the mounting groove in the lateral direction is less than the thickness of the pressure plate in the lateral direction, which is less than the thickness of the mounting plate in the lateral direction plus the thickness of the substrate in the lateral direction.

[0020] In this technical solution, after the gasket is inserted into the hanging groove, the pressure plate is then inserted into the pressure groove to press down the top of the mounting plate and the base plate. In this way, the gasket is restricted in the longitudinal direction and cannot move. Therefore, during the demolding stage, when the core drives the plastic product out of the cavity, the gasket will not stick to the plastic product and detach from the cavity together.

[0021] Furthermore, the longitudinal projections of the fixing plate, mounting plate, and pressure plate do not overlap with the longitudinal projection of the cavity.

[0022] Based on the above description, the beneficial effects of the present invention compared with the prior art are as follows:

[0023] The added fixing plate, mounting plate, and pressure plate for fixing the gasket positions have no protruding parts within the cavity. Relative to the cavity, the only "foreign object" is the base plate of each pair of gaskets. These base plates, adjustable in lateral thickness and slope angle, are only used to adjust the width of the cavity and the slope angle, and no gaps are formed between the structures. Therefore, the surface of the final plastic product will not have excess burrs due to the addition of the aforementioned gasket fixing and limiting structure. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a perspective view of the overall structure of the present invention;

[0026] Figure 2 This is a partial cross-sectional perspective view of the present invention;

[0027] Figure 3 This is a partial sectional front view of the die and punch of the present invention;

[0028] Figure 4 This is a partially exploded cross-sectional view of the die of the present invention;

[0029] Figure 5 For the present invention Figure 2 Enlarged view of point A in the middle;

[0030] Figure 6 This is a diagram showing the positional relationship between the gasket and its limiting component according to the present invention;

[0031] Figure 7 This is a schematic diagram illustrating the structural principle of the gasket of the present invention when the substrate is added or removed;

[0032] Figure 8 This is a diagram showing the installation sequence of the gasket and its limiting component according to the present invention.

[0033] The meanings of the labels in the diagram are as follows:

[0034] 100. Die; 101. Cavity; 102. Core; 110. Punch;

[0035] 200, Fixing plate; 201, Mounting groove; 202, Limiting block; 203, Anti-detachment bolt; 210, Mounting plate; 211, Hanging groove; 212, Anti-detachment groove; 220, Gasket; 221, Hanging block; 230, Pressure plate; 240, Slot; 241, Pressure groove; 242, Limiting groove. Detailed Implementation

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] After mass production, injection molds often require design changes (such as partial structural modifications, dimensional fine-tuning, or the addition of holes / ribs) due to market demand or functional optimization. Remanufacturing the mold directly would be costly and time-consuming. Adjusting the mold components allows for rapid adaptation to these changes, reducing modification costs.

[0039] By adding or removing shims within the mold cavity, key parameters such as the hole diameter and side angle of the product can be corrected, eliminating the need to re-machine the cavity. After adding the shims into the cavity, they need to be fixed to the die using protruding structures such as inserts or bolts. However, these protruding structures create gaps with the inner wall of the cavity. When the molten plastic is injected between the core and the cavity, it flows into these gaps under its own expansion pressure. After cooling, this results in numerous burrs forming on the surface of the plastic product.

[0040] Please see Figures 1-3To address the aforementioned problems, the present invention aims to provide an injection mold structure that facilitates component adjustment. The mold structure includes a cavity 100 and a punch 110. The cavity 100 has multiple cavities 101 on the side near the punch 110, and the punch 110 has multiple cores 102 integrally provided on the side near the cavity 100. Each cavity 101 is adapted to each core 102.

[0041] Specifically, such as Figure 4 As shown, slots 240 are provided on both sides of the cavity 101 that are far apart. The slots 240 penetrate the upper and lower parts of the die 100. Limiting components are slidably connected in both slots 240. The limiting components are inserted into the slots 240 through the side of the die 100 away from the cavity 101 and contact the cavity 101.

[0042] A pair of gaskets 220 are engaged in the cavity 101. When the limiting component slides longitudinally to the maximum depth in the slot 240, the gaskets 220 slide laterally to the edge of the inner sidewall of the cavity 101 and engage with the limiting component to fix the position of the gaskets 220 in the longitudinal direction.

[0043] The pad 220 includes a substrate and a hanging block 221. The shape and size of the hanging block 221 remain unchanged, while the thickness and tilt angle of the substrate can be selected to match the product requirements.

[0044] By maintaining a structure where the gasket 220 is laterally slidable while longitudinally locked, after the cavity 101 and core 102 are molded and molten plastic is injected, the gasket 220 adheres tightly to one side of the limiting component under the expansion force of the molten plastic. After cooling to form a plastic product, the mold 100 and punch 110 are opened longitudinally, and the core 102 slides out of the cavity 101 along the longitudinal direction. The plastic product, also fitted onto the outer surface of the core 102, is also removed from the cavity 101. The demolding process of the plastic product from the cavity 101 can employ commonly used demolding methods in the art, and its specific operation is not an improvement of this invention, so it will not be described in detail.

[0045] Since the plastic product is demolded longitudinally and the gasket 220 is fixed in the longitudinal direction, that is, no external force is applied to the gasket 220 in the movable direction. Therefore, the gasket 220 remains in close contact with the side wall of the limiting component after the product is demolded.

[0046] In practice, firstly, the limiting component is inserted longitudinally into the slot 240, and then the shim 220 is slid laterally within the cavity 101 to fit tightly against the limiting component. The thickness and angle of the shim 220 can be selected according to product requirements. Next, the hydraulic system closes the die 100 and the punch 110, and molten plastic is injected into the gap between the cavity 101 and the core 102. After the molten plastic cools and solidifies, the die 100 and the punch 110 are opened. When the core 102 slides out of the cavity 101, it carries the plastic product fitted onto it out of the cavity 101, while the shim 220 remains stationary within the cavity 101.

[0047] Continue reading Figure 4 This discloses the specific structure of the die 100 on the front and back sides of the cavity 101, wherein the side of the die 100 facing the opening of the cavity 101 is the front side, and the back side is the back side. The slot 240 has a pressure groove 241 on the side closer to the cavity 101, and the two sides of the slot 240 away from each other have enlarged limiting grooves 242, with the slot 240 located on the side adjacent to the pressure groove 241.

[0048] The limiting component is inserted through the back of the die 100 and fixed in the sliding direction, i.e., the longitudinal direction, by the limiting groove 242. This prevents the limiting component from shifting due to the outward expansion of the molten plastic after high-temperature and high-pressure plastic melt is injected into the cavity 101.

[0049] The following uses Figure 5 The limiting component is disclosed as shown in the figure. The limiting component includes a fixing plate 200 that slides into the slot 240 longitudinally, a pressure plate 230 that is slidably connected in the pressure groove 241, an mounting plate 210 that is slidably connected in the fixing plate 200 on the side near the cavity 101, and a pressure plate 230 that is inserted into the pressure groove 241 to fix the top of the mounting plate 210 and the gasket 220.

[0050] Limiting blocks 202 are fixedly connected to the two ends of the top of the fixed plate 200 that are far apart. The limiting blocks 202 limit the position of the fixed plate 200 in the longitudinal direction by being inserted into the limiting groove 242.

[0051] Specifically, in this application, "longitudinal" refers to the mold closing / opening direction of the die 100 and the punch 110, and "transverse" refers to the direction perpendicular to the longitudinal direction in the vertical plane.

[0052] Then through Figure 6 The positional connection relationship and function of each structure of the limiting component are disclosed: the mounting plate 210 can slide to the bottom of the fixing plate 200 and contact the inside of the cavity 101. The fixing plate 200 has an inwardly opened mounting groove 201 on the side close to the cavity 101, and the mounting plate 210 is slidably connected in the mounting groove 201.

[0053] A pair of anti-detachment bolts 203 are fixedly installed at the bottom of the mounting slot 201. The bottom of the mounting plate 210 has an anti-detachment groove 212 that matches the anti-detachment bolts 203 at the corresponding position. The anti-detachment bolts 203 are locked into the anti-detachment groove 212 to prevent the mounting plate 210 from sliding further down into the cavity 101.

[0054] It should be noted that, as Figure 6 As shown, when mounting plate 210 is installed from the back of mold 100, the opening of cavity 101 should be downward.

[0055] Continue to combine Figure 6 and Figure 7 The bottom of the mounting plate 210 has multiple hanging slots 211. When the anti-detachment slot 212 is engaged with the anti-detachment bolt 203, the top height of the hanging slot 211 is lower than the height of the inner top wall of the cavity 101. The hanging block 221 prevents itself from moving longitudinally by inserting into the hanging slot 211.

[0056] The thickness of the mounting groove 201 in the lateral direction is less than the thickness of the pressure plate 230 in the lateral direction, and the thickness of the pressure plate 230 in the lateral direction is less than the thickness of the mounting plate 210 in the lateral direction plus the thickness of the substrate in the lateral direction.

[0057] In other words, after inserting the gasket 220 into the hanging groove 211, the pressure plate 230 is then inserted into the pressure groove 241 to press down the top of the mounting plate 210 and the substrate. In this way, the gasket 220 is restricted in the longitudinal direction and cannot move. Therefore, during the demolding stage, when the core 102 drives the plastic product to detach from the cavity 101, the gasket 220 will not stick to the plastic product and detach from the cavity 101 together.

[0058] The longitudinal projections of the fixing plate 200, mounting plate 210, and pressure plate 230 do not overlap with the longitudinal projection of the cavity 101.

[0059] Understandably, none of the aforementioned structures used to fix the position of the gasket 220 protrude within the cavity 101. Relative to the cavity 101, the only foreign object is the pair of base plates of the gasket 220. These base plates, adjustable in lateral thickness and slope angle, are only used to adjust the width and slope angle of the cavity 101. Furthermore, no gaps are formed between the structures; therefore, the final plastic product surface will not have excess burrs due to the addition of the aforementioned fixing structures for the gasket 220.

[0060] The working principle of the mold structure will be explained in detail below:

[0061] like Figure 8As shown, the first step is to insert the fixing plate 200 into the pressure groove 241 and ensure that the limiting block 202 is locked in the limiting groove 242; the second step is to slide the mounting plate 210 to the bottom along the inner wall of the mounting groove 201 and ensure that the anti-detachment groove 212 and the anti-detachment bolt 203 are locked together; the third step is to slide the lateral pad 220 towards the mounting plate 210 so that the two are tightly attached, and insert the hanging block 221 into the hanging groove 211; the fourth step is to press the pressure plate 230 on the top of the mounting plate 210 and the pad 220.

[0062] After the above structures are installed, the concave mold 100 and the convex mold 110 are closed, and the molten plastic is injected between the cavity 101 and the core 102. After cooling, the core 102 is removed from the cavity 101 to obtain a plastic product with no burrs on the surface.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold structure for easy component adjustment, comprising a cavity (100) and a punch (110), wherein the cavity (100) has a plurality of cavities (101) on the side near the punch (110), and the punch (110) has a plurality of cores (102) integrally formed on the side near the cavity (100), wherein each cavity (101) is adapted to each core (102), characterized in that: Slots (240) are provided on both sides of the cavity (101) that are far apart. The slots (240) penetrate the upper and lower parts of the die (100). Limiting components are slidably connected in both slots (240). The limiting components are inserted into the slots (240) through the side of the die (100) away from the cavity (101) and contact the cavity (101). A pair of gaskets (220) are engaged in the cavity (101). When the limiting component slides longitudinally to the maximum depth in the slot (240), the gaskets (220) slide laterally to the edge of the inner wall of the cavity (101) and engage with the limiting component to fix the position of the gaskets (220) in the longitudinal direction. The pad (220) includes a base plate and a hanging block (221), the shape and size of which remain unchanged, and the thickness and tilt angle of the base plate in the lateral direction are adjustable.

2. The injection mold structure for easy component adjustment according to claim 1, characterized in that: The slot (240) has a pressure groove (241) on the side closer to the cavity (101), and the slot (240) has an enlarged limit groove (242) on the two sides away from each other. The slot (240) is located on the side adjacent to the pressure groove (241).

3. The injection mold structure for easy component adjustment according to claim 2, characterized in that: The limiting assembly includes a fixing plate (200) that slides longitudinally into a slot (240), a pressure plate (230) that is slidably connected in the pressure groove (241), an mounting plate (210) that is slidably connected in the fixing plate (200) on the side near the cavity (101), and a pressure plate (230) that is inserted in the pressure groove (241) to fix the top of the mounting plate (210) and the gasket (220).

4. The injection mold structure for easy component adjustment according to claim 3, characterized in that: The two ends of the top of the fixing plate (200) that are far apart are fixedly connected to the limiting blocks (202), and the limiting blocks (202) fix the longitudinal position of the fixing plate (200) by snapping into the limiting groove (242).

5. The injection mold structure for easy component adjustment according to claim 3, characterized in that: The mounting plate (210) can slide to the bottom of the fixing plate (200) and contact the inside of the cavity (101).

6. The injection mold structure for easy component adjustment according to claim 3, characterized in that: The fixing plate (200) has an inwardly formed mounting groove (201) on the side near the cavity (101), and the mounting plate (210) is slidably connected in the mounting groove (201).

7. The injection mold structure for easy component adjustment according to claim 6, characterized in that: A pair of anti-detachment bolts (203) are fixedly provided at the bottom of the mounting groove (201). The bottom of the mounting plate (210) is provided with an anti-detachment groove (212) that matches the anti-detachment bolts (203). The anti-detachment bolts (203) are inserted into the anti-detachment grooves (212) to prevent the mounting plate (210) from sliding further down into the cavity (101).

8. The injection mold structure for easy component adjustment according to claim 7, characterized in that: The mounting plate (210) has multiple hanging slots (211) at the bottom. When the anti-detachment slot (212) is engaged with the anti-detachment bolt (203), the top height of the hanging slot (211) is lower than the height of the inner top wall of the cavity (101). The hanging block (221) prevents itself from moving longitudinally by inserting into the hanging slot (211).

9. The injection mold structure for easy component adjustment according to claim 6, characterized in that: The thickness of the mounting groove (201) in the lateral direction is less than the thickness of the pressure plate (230) in the lateral direction, and the thickness of the pressure plate (230) in the lateral direction is less than the thickness of the mounting plate (210) in the lateral direction plus the thickness of the substrate in the lateral direction.

10. The injection mold structure for easy component adjustment according to claim 3, characterized in that: The longitudinal projections of the fixing plate (200), mounting plate (210), and pressure plate (230) do not overlap with the longitudinal projection of the cavity (101).

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